Gamma-ray Burst 140304A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 04 Mar 14 13:22:50 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     590206,   Seg_Num: 0
GRB_RA:           30.668d {+02h 02m 40s} (J2000),
                  30.877d {+02h 03m 30s} (current),
                  29.935d {+01h 59m 44s} (1950)
GRB_DEC:         +33.485d {+33d 29' 07"} (J2000),
                 +33.553d {+33d 33' 11"} (current),
                 +33.245d {+33d 14' 42"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       5015 [cnts]    Image_Peak=349 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   146     E_range: 25-100 keV
BKG_INTEN:       26726 [cnts]
BKG_TIME:        48132.28 SOD {13:22:12.28} UT
BKG_DUR:         8 [sec]
GRB_DATE:        16720 TJD;    63 DOY;   14/03/04
GRB_TIME:        48151.09 SOD {13:22:31.09} UT
GRB_PHI:         152.39 [deg]
GRB_THETA:        25.20 [deg]
SOLN_STATUS:     0x20000003
RATE_SIGNIF:     25.61 [sigma]
IMAGE_SIGNIF:    11.82 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +2  +1  +0  +0 -52  +0 
SUN_POSTN:       345.15d {+23h 00m 37s}   -6.34d {-06d 20' 13"}
SUN_DIST:         58.85 [deg]   Sun_angle= -3.0 [hr] (East of Sun)
MOON_POSTN:       24.77d {+01h 39m 04s}  +10.57d {+10d 33' 55"}
MOON_DIST:        23.66 [deg]
MOON_ILLUM:      13 [%]
GAL_COORDS:      139.58,-27.07 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       40.36, 19.69 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This is a rate trigger.  
COMMENTS:        A point_source was found.  
COMMENTS:        This does not match any source in the on-board catalog.  
COMMENTS:        This does not match any source in the ground catalog.  
COMMENTS:        This is a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 4.34,12.16 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This BAT event is temporally(0.0<100sec) coincident with the FERMI_GBM event (trignum=415632154).

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Tue 04 Mar 14 13:23:17 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      56
TRIGGER_NUM:     415632154
GRB_RA:           41.390d {+02h 45m 34s} (J2000),
                  41.608d {+02h 46m 26s} (current),
                  40.622d {+02h 42m 29s} (1950)
GRB_DEC:         +35.110d {+35d 06' 36"} (J2000),
                 +35.169d {+35d 10' 09"} (current),
                 +34.900d {+34d 53' 60"} (1950)
GRB_ERROR:       7.91 [deg radius, statistical only]
DATA_SIGNIF:     7.80 [sigma]
DATA_INTERVAL:   4.096 [sec]
GRB_DATE:        16720 TJD;    63 DOY;   14/03/04
GRB_TIME:        48151.48 SOD {13:22:31.48} UT
GRB_PHI:         352.00 [deg]
GRB_THETA:        64.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4143 (Gnd S/W Version number)
SUN_POSTN:       345.15d {+23h 00m 37s}   -6.34d {-06d 20' 13"}
SUN_DIST:         67.33 [deg]   Sun_angle= -3.8 [hr] (East of Sun)
MOON_POSTN:       24.77d {+01h 39m 05s}  +10.57d {+10d 33' 59"}
MOON_DIST:        28.98 [deg]
MOON_ILLUM:      13 [%]
GAL_COORDS:      147.89,-22.17 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       49.75, 18.21 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(0.0<100sec) coincident with the SWIFT_BAT event (trignum=590206).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Tue 04 Mar 14 13:23:22 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      65
TRIGGER_NUM:     415632154
GRB_RA:           37.940d {+02h 31m 46s} (J2000),
                  38.156d {+02h 32m 37s} (current),
                  37.181d {+02h 28m 43s} (1950)
GRB_DEC:         +35.030d {+35d 01' 48"} (J2000),
                 +35.092d {+35d 05' 32"} (current),
                 +34.809d {+34d 48' 33"} (1950)
GRB_ERROR:       7.35 [deg radius, statistical only]
DATA_SIGNIF:     8.50 [sigma]
DATA_INTERVAL:   4.096 [sec]
GRB_DATE:        16720 TJD;    63 DOY;   14/03/04
GRB_TIME:        48151.48 SOD {13:22:31.48} UT
GRB_PHI:         351.00 [deg]
GRB_THETA:        67.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4143 (Gnd S/W Version number)
SUN_POSTN:       345.15d {+23h 00m 37s}   -6.34d {-06d 20' 13"}
SUN_DIST:         64.79 [deg]   Sun_angle= -3.5 [hr] (East of Sun)
MOON_POSTN:       24.77d {+01h 39m 06s}  +10.57d {+10d 33' 60"}
MOON_DIST:        27.38 [deg]
MOON_ILLUM:      13 [%]
GAL_COORDS:      145.17,-23.47 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       46.91, 19.05 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(0.0<100sec) coincident with the SWIFT_BAT event (trignum=590206).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Tue 04 Mar 14 13:22:57 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      44
TRIGGER_NUM:     415632154
GRB_RA:           35.900d {+02h 23m 36s} (J2000),
                  36.109d {+02h 24m 26s} (current),
                  35.165d {+02h 20m 40s} (1950)
GRB_DEC:         +30.267d {+30d 16' 00"} (J2000),
                 +30.331d {+30d 19' 50"} (current),
                 +30.040d {+30d 02' 24"} (1950)
GRB_ERROR:       21.28 [deg radius, statistical plus systematic]
GRB_INTEN:       93 [cnts/sec]
DATA_SIGNIF:     6.80 [sigma]
INTEG_TIME:      2.048 [sec]
GRB_DATE:        16720 TJD;    63 DOY;   14/03/04
GRB_TIME:        48151.48 SOD {13:22:31.48} UT
GRB_PHI:         355.00 [deg]
GRB_THETA:        70.00 [deg]
DATA_TIME_SCALE: 2.0480 [sec]
HARD_RATIO:      1.04
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      92%  GRB
2nd_MOST_LIKELY:   2%  Solar Flare
DETECTORS:       0,1,0, 1,1,0, 0,0,0, 0,0,0, 0,0,
SUN_POSTN:       345.15d {+23h 00m 37s}   -6.34d {-06d 20' 13"}
SUN_DIST:         61.01 [deg]   Sun_angle= -3.4 [hr] (East of Sun)
MOON_POSTN:       24.77d {+01h 39m 05s}  +10.57d {+10d 33' 56"}
MOON_DIST:        22.40 [deg]
MOON_ILLUM:      13 [%]
GAL_COORDS:      145.56,-28.52 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       43.55, 15.13 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 98.82,-17.00 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(0.0<100sec) coincident with the SWIFT_BAT event (trignum=590206).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 04 Mar 14 13:29:38 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     6563187,   Seg_Num: 64
GRB_RA:           30.668d {+02h 02m 40s} (J2000),
                  30.877d {+02h 03m 30s} (current),
                  29.935d {+01h 59m 44s} (1950)
GRB_DEC:         +33.485d {+33d 29' 07"} (J2000),
                 +33.553d {+33d 33' 11"} (current),
                 +33.245d {+33d 14' 42"} (1950)
GRB_DATE:        16720 TJD;    63 DOY;   14/03/04
GRB_TIME:        48151.09 SOD {13:22:31.09} UT
TRIGGER_INDEX:   146
GRB_PHI:         152.39 [deg]
GRB_THETA:        25.20 [deg]
DELTA_TIME:      -16815.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    0.00 [sigma]
LC_URL:          sw00590206000msb.lc
SUN_POSTN:       345.16d {+23h 00m 38s}   -6.34d {-06d 20' 06"}
SUN_DIST:         58.85 [deg]   Sun_angle= -3.0 [hr] (East of Sun)
MOON_POSTN:       24.83d {+01h 39m 20s}  +10.58d {+10d 34' 59"}
MOON_DIST:        23.63 [deg]
MOON_ILLUM:      13 [%]
GAL_COORDS:      139.58,-27.07 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       40.36, 19.69 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Lightcurve.  
COMMENTS:           
COMMENTS:        WARNING: No BAT_Position TDRSS message was received for this trigger_number!  
COMMENTS:           
COMMENTS:           
COMMENTS:        The next comments were copied from the BAT_POS Notice:  
COMMENTS:        This is a rate trigger.  
COMMENTS:        A point_source was found.  
COMMENTS:        This does not match any source in the on-board catalog.  
COMMENTS:        This does not match any source in the ground catalog.  
COMMENTS:        This is a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 4.34,12.16 [deg].  
COMMENTS:        The 3rd packet (of 3) was missing in the lightcurve data stream.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 04 Mar 14 13:24:21 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     590206,   Seg_Num: 0
GRB_RA:           30.6428d {+02h 02m 34.27s} (J2000),
                  30.8511d {+02h 03m 24.25s} (current),
                  29.9099d {+01h 59m 38.37s} (1950)
GRB_DEC:         +33.4737d {+33d 28' 25.3"} (J2000),
                 +33.5415d {+33d 32' 29.4"} (current),
                 +33.2333d {+33d 13' 59.7"} (1950)
GRB_ERROR:       6.1 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       6.28e-10 [erg/cm2/sec]
GRB_SIGNIF:      5.38 [sigma]
IMG_START_DATE:  16720 TJD;    63 DOY;   14/03/04
IMG_START_TIME:  48226.28 SOD {13:23:46.28} UT,   75.2 [sec] since BAT Trigger Time
TAM[0-3]:        327.70 237.22 261.71 243.43
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       345.16d {+23h 00m 37s}   -6.34d {-06d 20' 12"}
SUN_DIST:         58.83 [deg]   Sun_angle= -3.0 [hr] (East of Sun)
MOON_POSTN:       24.78d {+01h 39m 08s}  +10.57d {+10d 34' 09"}
MOON_DIST:        23.64 [deg]
MOON_ILLUM:      13 [%]
GAL_COORDS:      139.56,-27.09 [deg] galactic lon,lat of the burst
ECL_COORDS:       40.34, 19.69 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 1.45 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 04 Mar 14 13:24:32 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     590206,   Seg_Num: 0
GRB_RA:           30.6428d {+02h 02m 34.2s} (J2000),
                  30.8511d {+02h 03m 24.2s} (current),
                  29.9099d {+01h 59m 38.3s} (1950)
GRB_DEC:         +33.4737d {+33d 28' 25.3"} (J2000),
                 +33.5415d {+33d 32' 29.4"} (current),
                 +33.2333d {+33d 13' 59.7"} (1950)
GRB_ERROR:       5.8 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       29 [cnts]
IMG_START_DATE:  16720 TJD;    63 DOY;   14/03/04
IMG_START_TIME:  48226.28 SOD {13:23:46.28} UT,   75.2 [sec] since BAT Trigger Time
CENTROID_X:      274.59,  raw= 275  [pixels]
CENTROID_Y:      301.85,  raw= 302  [pixels]
ROLL:            236.09 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   9.54
GRB_POS_XRT_Z:   -72.38
IMAGE_URL:       sw00590206000msxps_rw.img
SUN_POSTN:       345.16d {+23h 00m 37s}   -6.34d {-06d 20' 11"}
SUN_DIST:         58.83 [deg]   Sun_angle= -3.0 [hr] (East of Sun)
MOON_POSTN:       24.78d {+01h 39m 08s}  +10.57d {+10d 34' 11"}
MOON_DIST:        23.64 [deg]
MOON_ILLUM:      13 [%]
GAL_COORDS:      139.56,-27.09 [deg] galactic lon,lat of the burst
ECL_COORDS:       40.34, 19.69 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 04 Mar 14 13:24:45 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     590206,   Seg_Num: 0
GRB_RA:           30.6428d {+02h 02m 34.2s} (J2000),
                  30.8511d {+02h 03m 24.2s} (current),
                  29.9099d {+01h 59m 38.3s} (1950)
GRB_DEC:         +33.4737d {+33d 28' 25.3"} (J2000),
                 +33.5415d {+33d 32' 29.4"} (current),
                 +33.2333d {+33d 13' 59.7"} (1950)
GRB_ERROR:       5.8 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       29 [cnts]
IMG_START_DATE:  16720 TJD;    63 DOY;   14/03/04
IMG_START_TIME:  48226.28 SOD {13:23:46.28} UT,   75.2 [sec] since BAT Trigger Time
CENTROID_X:      274.59,  raw= 275  [pixels]
CENTROID_Y:      301.85,  raw= 302  [pixels]
ROLL:            236.09 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   9.54
GRB_POS_XRT_Z:   -72.38
IMAGE_URL:       sw00590206000msxps_rw.img
SUN_POSTN:       345.16d {+23h 00m 37s}   -6.34d {-06d 20' 11"}
SUN_DIST:         58.83 [deg]   Sun_angle= -3.0 [hr] (East of Sun)
MOON_POSTN:       24.79d {+01h 39m 09s}  +10.57d {+10d 34' 13"}
MOON_DIST:        23.64 [deg]
MOON_ILLUM:      13 [%]
GAL_COORDS:      139.56,-27.09 [deg] galactic lon,lat of the burst
ECL_COORDS:       40.34, 19.69 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN Circular #15914
E. Gorbovskoy, V. Lipunov, M. Pruzhinskaya, D.Denisenko, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.V.Chazov, D.Kuvshinov Lomonosov Moscow State University, Sternberg Astronomical Institute
K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk Irkutsk State University
V.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov Blagoveschensk Educational State University, Blagoveschensk
A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik Kislovodsk Solar Station of the Pulkovo Observatory
V.Krushinski, I.Zalozhnih, A. Popov Ural Federal University, Kourovka
Hugo Levato and Carlos Saffe Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)
Claudio Mallamaci, Carlos Lopez and Federico Podest Observatorio Astronomico Felix Aguilar (OAFA)
MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in Tunka was pointed to the GRB140304A 84 sec after trigger time at 2014-03-04 13:23:55.366 UT. On our first (10s exposure) set we found optical transient within SWIFT error-box (ra=02 02 38 dec=+33 29 24 r=0.050000)
02h 02m 34.13s , +33d 28m 26s.6 mag 16.5
The message may be cited.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 04 Mar 14 13:38:20 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     590206,   Seg_Num: 0
GRB_RA:           30.6418d {+02h 02m 34.03s} (J2000),
                  30.8501d {+02h 03m 24.01s} (current),
                  29.9089d {+01h 59m 38.13s} (1950)
GRB_DEC:         +33.4722d {+33d 28' 19.9"} (J2000),
                 +33.5400d {+33d 32' 24.0"} (current),
                 +33.2318d {+33d 13' 54.3"} (1950)
GRB_ERROR:       4.8 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  16720 TJD;    63 DOY;   14/03/04
IMG_START_TIME:  48285.00 SOD {13:24:45.00} UT,   133.9 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       345.16d {+23h 00m 39s}   -6.33d {-06d 19' 58"}
SUN_DIST:         58.82 [deg]   Sun_angle= -3.0 [hr] (East of Sun)
MOON_POSTN:       24.91d {+01h 39m 39s}  +10.61d {+10d 36' 21"}
MOON_DIST:        23.57 [deg]
MOON_ILLUM:      13 [%]
GAL_COORDS:      139.56,-27.09 [deg] galactic lon,lat of the burst
ECL_COORDS:       40.34, 19.69 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        This is an Update Notice -- the RA,Dec values herein supersede the previous XRT_POS Notice.  
COMMENTS:        TAM values, flux and significance fields are not valid.  
COMMENTS:        This position was automatically generated on the ground using  
COMMENTS:        Photon Counting data telemetered via TDRSS (SPER data).  
COMMENTS:        See http://www.swift.ac.uk/sper/docs.php for details.  
COMMENTS:        The probability that this is a serendipitous source in the  
COMMENTS:        SPER window is 0.11% < P(seren) < 0.58%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 04 Mar 14 13:47:08 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     590206,   Seg_Num: 0
POINT_RA:         30.659d {+02h 02m 38s} (J2000)
POINT_DEC:       +33.488d {+33d 29' 18"} (J2000)
POINT_ROLL:      236.091d
IMG_START_DATE:  16720 TJD;    63 DOY;   14/03/04
IMG_START_TIME:  48288.89 SOD {13:24:48.89} UT,   137.8 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.653
N_STARS:         190
X_OFFSET:        0 [pixels]
Y_OFFSET:        0 [pixels]
X_MAX:           2047 [pixels]
Y_MAX:           2047 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00590206000msufc0137.fits
SUN_POSTN:       345.17d {+23h 00m 41s}   -6.33d {-06d 19' 50"}
SUN_DIST:         58.83 [deg]   Sun_angle= -3.0 [hr] (East of Sun)
MOON_POSTN:       24.99d {+01h 39m 59s}  +10.63d {+10d 37' 44"}
MOON_DIST:        23.55 [deg]
MOON_ILLUM:      14 [%]
GAL_COORDS:      139.57,-27.07 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       40.36, 19.70 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 04 Mar 14 13:47:35 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     590206,   Seg_Num: 0
POINT_RA:         30.659d {+02h 02m 38s} (J2000)
POINT_DEC:       +33.488d {+33d 29' 18"} (J2000)
POINT_ROLL:      236.091d
IMG_START_DATE:  16720 TJD;    63 DOY;   14/03/04
IMG_START_TIME:  48288.89 SOD {13:24:48.89} UT,   137.8 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.653
N_STARS:         190
X_OFFSET:        0 [pixels]
Y_OFFSET:        0 [pixels]
X_MAX:           2047 [pixels]
Y_MAX:           2047 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00590206000msufc0137.fits
SUN_POSTN:       345.17d {+23h 00m 41s}   -6.33d {-06d 19' 49"}
SUN_DIST:         58.83 [deg]   Sun_angle= -3.0 [hr] (East of Sun)
MOON_POSTN:       25.00d {+01h 40m 00s}  +10.63d {+10d 37' 48"}
MOON_DIST:        23.55 [deg]
MOON_ILLUM:      14 [%]
GAL_COORDS:      139.57,-27.07 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       40.36, 19.70 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        If you have elected to receive attachments:  
COMMENTS:        The uvot_catalog_srclist.fits.gz file does not exist; skipping the attachment.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 04 Mar 14 13:47:53 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     590206,   Seg_Num: 0
GRB_RA:           30.6412d {+02h 02m 33.88s} (J2000),
                  30.8495d {+02h 03m 23.87s} (current),
                  29.9083d {+01h 59m 37.99s} (1950)
GRB_DEC:         +33.4744d {+33d 28' 27.8"} (J2000),
                 +33.5422d {+33d 32' 31.9"} (current),
                 +33.2340d {+33d 14' 02.2"} (1950)
GRB_ERROR:       2.2 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  16720 TJD;    63 DOY;   14/03/04
IMG_START_TIME:  48285.00 SOD {13:24:45.00} UT,   133.9 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       345.17d {+23h 00m 41s}   -6.33d {-06d 19' 49"}
SUN_DIST:         58.81 [deg]   Sun_angle= -3.0 [hr] (East of Sun)
MOON_POSTN:       25.00d {+01h 40m 00s}  +10.63d {+10d 37' 51"}
MOON_DIST:        23.53 [deg]
MOON_ILLUM:      14 [%]
GAL_COORDS:      139.56,-27.09 [deg] galactic lon,lat of the burst
ECL_COORDS:       40.34, 19.69 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        This is an Update Notice -- the RA,Dec values herein supersede the previous XRT_POS Notice.  
COMMENTS:        TAM values, flux and significance fields are not valid.  
COMMENTS:        This position was automatically generated on the ground using  
COMMENTS:        Photon Counting data telemetered via TDRSS (SPER data).  
COMMENTS:        See http://www.swift.ac.uk/sper/docs.php for details.  
COMMENTS:        This position was enhanced using UVOT field astrometry.  
COMMENTS:        The probability that this is a serendipitous source in the  
COMMENTS:        SPER window is 0.11% < P(seren) < 0.58%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 04 Mar 14 13:48:33 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     590206,   Seg_Num: 0
POINT_RA:         30.659d {+02h 02m 38s} (J2000)
POINT_DEC:       +33.488d {+33d 29' 18"} (J2000)
ROLL:            236.091d
IMG_START_DATE:  16720 TJD;    63 DOY;   14/03/04
IMG_START_TIME:  48288.89 SOD {13:24:48.89} UT,   137.8 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     415632300
X_OFFSET:        899 [pixels]
Y_OFFSET:        779 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1059
Y_GRB_POS:       939
BINNING_INDEX:   1
IM_URL:          sw00590206000msuni0149.fits
SUN_POSTN:       345.17d {+23h 00m 41s}   -6.33d {-06d 19' 48"}
SUN_DIST:         58.83 [deg]   Sun_angle= -3.0 [hr] (East of Sun)
MOON_POSTN:       25.01d {+01h 40m 02s}  +10.63d {+10d 37' 57"}
MOON_DIST:        23.54 [deg]
MOON_ILLUM:      14 [%]
GAL_COORDS:      139.57,-27.07 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       40.36, 19.70 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 04 Mar 14 13:48:49 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     590206,   Seg_Num: 0
POINT_RA:         30.659d {+02h 02m 38s} (J2000)
POINT_DEC:       +33.488d {+33d 29' 18"} (J2000)
ROLL:            236.091d
IMG_START_DATE:  16720 TJD;    63 DOY;   14/03/04
IMG_START_TIME:  48288.89 SOD {13:24:48.89} UT,   137.8 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     415632300
X_OFFSET:        899 [pixels]
Y_OFFSET:        779 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1059
Y_GRB_POS:       939
BINNING_INDEX:   1
IM_URL:          sw00590206000msuni0149.fits
SUN_POSTN:       345.17d {+23h 00m 41s}   -6.33d {-06d 19' 48"}
SUN_DIST:         58.83 [deg]   Sun_angle= -3.0 [hr] (East of Sun)
MOON_POSTN:       25.01d {+01h 40m 02s}  +10.63d {+10d 37' 60"}
MOON_DIST:        23.54 [deg]
MOON_ILLUM:      14 [%]
GAL_COORDS:      139.57,-27.07 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       40.36, 19.70 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        If you have elected to receive attachments:  
COMMENTS:        The uvot_catalog_image.fits.gz file does not exist; skipping the attachment.

GCN Circular #15915
P. A. Evans (U Leicester), A. P. Beardmore (U Leicester), D. N. Burrows (PSU), N. Gehrels (NASA/GSFC), S. T. Holland (STScI), J. A. Kennea (PSU), H. A. Krimm (CRESST/GSFC/USRA), C. B. Markwardt (NASA/GSFC), F. E. Marshall (NASA/GSFC), A. Maselli (INAF-IASFPA), K. L. Page (U Leicester), D. M. Palmer (LANL), T. Sakamoto (AGU), M. H. Siegel (PSU) and T. N. Ukwatta (MSU) report on behalf of the Swift Team:
At 13:22:31 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 140304A (trigger=590206). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 30.668, +33.485 which is
```
   RA(J2000) = 02h 02m 40s
   Dec(J2000) = +33d 29' 07"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a multi-peaked structure with a total duration of about 20 sec. The peak count rate was ~3600 counts/sec (15-350 keV), at ~0 sec after the trigger.
The XRT began observing the field at 13:23:46.2 UT, 75.2 seconds after the BAT trigger. Using promptly downlinked data we find a bright, uncatalogued X-ray source with an enhanced position: RA, Dec 30.6412, 33.4744 which is equivalent to:
```
   RA(J2000)  = 02h 02m 33.90s
   Dec(J2000) = +33d 28' 27.9"
```
with an uncertainty of 2.2 arcseconds (radius, 90% containment). This location is 89 arcseconds from the BAT onboard position, within the BAT error circle. This position may be improved as more data are received; the latest position is available at http://www.swift.ac.uk/sper.
A power-law fit to a spectrum formed from promptly downlinked event data gives a column density consistent with the Galactic value of 5.98 x 10^20 cm^-2 (Kalberla et al. 2005).
The initial flux in the 2.5 s image was 6.28e-10 erg cm^-2 s^-1 (0.2-10 keV).
UVOT took a finding chart exposure of 250 seconds with the U filter starting 137 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image processing FAILED because of no aspect solution. Results from the list of sources generated on-board are not available at this time. No correction has been made for the expected extinction corresponding to E(B-V) of 0.08.
This GRB will enter a Moon observing constraint around 20:00 UT and will not be observable again by Swift until March 6 (Thursday) around 05:30 UT.
Burst Advocate for this burst is P. A. Evans (pae9 AT star.le.ac.uk). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/too.html.)
GCN Circular #15916
D. Xu (DARK/NBI), H.-B. Niu, G.-J. Feng, T.-Z. Yang, A. Esamdin, L. Ma (XAO) report:
We observed the field of GRB 140304A (Evans et al., GCN 15915) using the 1m telescope located in Nanshan, Xinjiang, China. Observations started at 13:43:26 UT on 2014-03-04 (i.e., 0.349 hr after the BAT trigger) and a series of 120s and 500s R-band images were obtained.
In the first 120s R-band image, an optical source is clearly detected at the MASTER position (Gorbovskoy et al., GCN 15914), which is also consistent with the Swift/XRT position. We thus think this is the afterglow of the burst, and it has decayed to R=19.4+/-0.2 mag, calibrated with nearby SDSS stars.
Observations are ongoing.
GCN Circular #15917
A.Volnova (IKI), A. Pozanenko (IKI), I. Korobtsev (ISTP), E. Klunko=20 (ISTP), M. Eselevich (ISTP), report on behalf of larger GRB follow-up=20 collaboration:
We observed the field of GRB 140304A (Evans et al., GCN 15915) with=20 AZT-33IK telescope of Mondy observatory starting on Mar. 04 (UT)=20 13:54:10, i.e. ~0.5 hour after burst trigger. In the first images of 60=20 s exposure we clearly detected afterglow of GRB 140304A reported by=20 Gorbovskoy et al. (GCN 15914) and Xu et al. (GCN 15916). Preliminary=20 photometry of the fading afterglow is following:
```
date       UT start   t-T0      Exp.  Filter  OT
                      (mid, days) (s)
2014-03-04 13:54:10  0.02406    6*60  R       20.29 =C2=B1 0.17
```
The photometry is based on reference stars SDSS-DR9, (R mag, transformation by Lupton 2005):
```
N  SDSS_id          R(Lupton)   err
J020233.12+332550.3 15.665 0.012
J020219.91+332738.5 14.785 0.012
```
GCN Circular #15918
A. Volnova (IKI), N. Tungalag (Research Centre of Astronomy and Geophysics MAS), S. Schmalz (AIP), V. Voropaev (KIAM), I.Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration:
We observed the field of the he field of GRB 140304A (Evans et al., GCN 15915) with ORI-40 telescope of Khureltogot observatory starting on Mar., 04 (UT)13:29:36, i.e., ~7 minutes after the GRB trigger. In the first unfiltered images of 60 s exposure we clearly detected afterglow of GRB 140304A reported by Gorbovskoy et al. (GCN 15914), Xu et al. (GCN 15916), and Volnova et al., (GCN 15917). Preliminary photometry of the fading afterglow is following:
```
date       UT start   t-T0      Exp.  Filter  OT
                       (mid, days) (s)
2014-03-04 13:29:36   0.00602   3*60  none    17.5 +/- 0.2
```
The photometry is based on reference stars SDSS-DR9, (R mag, transformation by Lupton 2005):
```
N  SDSS_id          R(Lupton)err
J020233.12+332550.3 15.665 0.012
J020219.91+332738.5 14.785 0.012
```
GCN Circular #15920
F. E. Marshall (NASA/GSFC) and P. A. Evans (U. Leicester) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 140304A 138 s after the BAT trigger (Evans et al., GCN Circ. 15915). No optical afterglow consistent with the optical position (Gorbovskoy et al. GCN Circ. 15914) is detected in the initial UVOT exposures. Preliminary 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first finding chart (FC) exposure and subsequent exposures are:
```
Filter         T_start(s)   T_stop(s)      Exp(s)         Mag

u_FC               138          388          246         >20.4
v                  420         1561          165         >19.5
u                  138         1519          529         >20.9
w1                 469         1495          156         >19.7
m2                 570         1470          117         >20.1
w2                 396         1546          156         >20.0
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.08 in the direction of the burst (Schlegel et al. 1998).
In view of the bright (16.5 mag) afterglow reported by Gorbovskoy et al., it is likely that the GRB has large intrinsic extinction or is at a redshift greater than about 3.5.
GCN Circular #15921
A. de Ugarte Postigo (IAA-CSIC, DARK/NBI), J. Gorosabel (EHU-UPV, IAA-CSIC), D. Xu (DARK/NBI), D. Malesani (DARK/NBI), A. Somero (NOT), B. Milvang-Jensen (DARK/NBI), M.I. Andersen (DARK/NBI), P. Jakobsson (U. Iceland) and J.P.U. Fynbo (DARK/NBI) report on behalf of a larger collaboration:
We have observed the afterglow of 140304A (Gorbovskoy et al. GCN 15914, Evans et al. GCN 15915) with the Nordic Optical Telescope (NOT) equipped with ALFOSC. Observations started at 20:19 UT on March 4 (i.e., 6.95 hr after the burst) in r and g-bands. The afterglow is clearly detected in r-band at 20.5 mag, but undetected in g-band down to a 3-sigma limit of 21.5, pointing towards a high-redshift event at z ~ 5 if the Lyman break is between g and r-band.
Further observations are ongoing.
GCN Circular #15922
S. Jeong, R. S=E1nchez-Ram=EDrez (IAA-CSIC), A. J. Castro-Tirado (IAA-CSIC, UMA), J. Gorosabel (EHU-UPV, IAA-CSIC), M. Jelinek, J. C. Tello, P. Ferrero, O. Lara-Gil, R. Cunniffe (IAA-CSIC), D. P=E9rez-Ram=EDrez (U. Ja= =E9n), S. Guziy (Nikolaev Univ.), J. M. Castro Cer=F3n (ESAC), A. Fern=E1ndez-Soto (UV), J. Cepa (IAC), M. A. Rivero and G. G=F3mez-Velarde (GTC), on behalf of a larger collaboration, report:
=93Following the detection of the optical afterglow (Gorbovskoy et al. GCNC 15914) to GRB 140304A (Evans et al. GCNC 15915), we have obtained an optical spectrum with the 10.4 m GTC (+OSIRIS) starting aprox. 8.2 hr postburst, covering the 5700-10000 wavelength range. The continuum is detected only redwards of aprox. 7750 A, with several absorption metallic lines (N V, Si II and Si IV amongst others) at a common redshift of z =3D 5.XX which we propose to be the redshift of GRB 140304A. This is consistent with the Swift/UVOT upper limits (Marshall et al. GCNC 15920) and the NOT optical observation (de Ugarte Postigo et al. GCNC 15921).=94
GCN Circular #15923
P. Jenke (UAH) and G. Fitzpatrick (UCD) reports on behalf of the Fermi GBM Team:
"At 13:22:31.48 UT on March 4 2014, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 140304A (trigger 415632154/140304577), which was also detected by Swift (P. A. Evans et al. 2014, GCN 15915). The GBM on-ground location, using the Fermi GBM trigger data, is consistent with the Swift/XRT location.
The angle of the burst direction to the Fermi LAT boresight is 80 degrees.
The GBM light curve consists of two main peaks with a combined duration (T90) of 32 +/- 6 s (50-300 keV). The time-averaged spectrum from T0-5 s to T0+14 s is well fit by a power law function with an exponential high energy cutoff. The power law index is -1.1 +/- 0.1 and the high energy cutoff, parameterized as EPeak, is 185 +/- 35 keV.
The event fluence (10-1000 keV) in this time interval is (2.6 +/- 0.2)E-06 erg/cm^2. The 1.0-sec peak photon flux measured starting from T0+7.2 s in the 10-1000 keV band is 2.5 +/- 0.3 ph/s/cm^2.
The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN Circular #15924
A. de Ugarte Postigo (IAA-CSIC, DARK/NBI), D. Xu (DARK/NBI), J. Gorosabel (EHU-UPV, IAA-CSIC), D. Malesani (DARK/NBI), B. Milvang-Jensen (DARK/NBI), M.I. Andersen (DARK/NBI), P. Jakobsson (U. Iceland), J.P.U. Fynbo (DARK/NBI), and A. Somero (Tuorla Obs.) report on behalf of a larger collaboration:
Following the photometry reported in GCN 15921, we have performed spectroscopy of GRB 140304A (Gorbovskoy et al. GCN 15914, Evans et al. GCN 15915) with the Nordic Optical Telescope (NOT) equipped with ALFOSC. The observation began at 21:20 UT (7.97 hr after the burst) and consisted of a single 1500 s exposure covering the range between 3200 and 9100 A.
We detect continuum emission with a deep absorption consistent with a DLA at a redshift of 5.28+/-0.02, as well as emission down to ~5800 A, which is consistent with the Ly-limit at a similar redshift. Despite the lack of metal features identified in our spectrum, a redshift of z=5.39 as reported by Jeong et al. (GCN 15922) is inconsistent with our data.
GCN Circular #15925
A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team.
Using 3335 s of XRT Photon Counting mode data and 5 UVOT images for GRB 140304A, we find an astrometrically corrected X-ray position (using the XRT-UVOT alignment and matching UVOT field sources to the USNO-B1 catalogue): RA, Dec = 30.64267, +33.47384 which is equivalent to:
```
RA (J2000): 02h 02m 34.24s
Dec (J2000): +33d 28' 25.8"
```
with an uncertainty of 1.6 arcsec (radius, 90% confidence).
This position may be improved as more data are received. The latest position can be viewed at http://www.swift.ac.uk/xrt_positions. Position enhancement is described by Goad et al. (2007, A&A, 476, 1401) and Evans et al. (2009, MNRAS, 397, 1177).
This circular was automatically generated, and is an official product of the Swift-XRT team.
GCN Circular #15926
K.L. Page (U. Leicester), C. Pagani (U. Leicester), A. Maselli (INAF-IASFPA), A. Melandri (INAF-OAB), B. Sbarufatti (INAF-OAB/PSU), J.A. Kennea (PSU), V. Mangano (PSU), M.C. Stroh (PSU), A.P. Beardmore (U. Leicester) and P.A. Evans report on behalf of the Swift-XRT team:
We have analysed 6.4 ks of XRT data for GRB 140304A (Evans et al. GCN Circ. 15915), from 81 s to 23.1 ks after the BAT trigger. The data comprise 42 s in Windowed Timing (WT) mode with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Beardmore et al. (GCN Circ. 15925). The late-time light curve (from T0+5.2 ks) is consistent with a constant source of mean count rate 1.1e+00 ct/sec. A power-law fit gives an index of 0.2 (+/-0.7).
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 2.00 (+0.15, -0.14). The best-fitting absorption column is 9.8 (+3.4, -3.1) x 10^20 cm^-2, in excess of the Galactic value of 6.0 x 10^20 cm^-2 (Kalberla et al. 2005). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.6 x 10^-11 (4.6 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     9.8 (+3.4, -3.1) x 10^20 cm^-2
Galactic foreground: 6.0 x 10^20 cm^-2
Excess significance: 2.0 sigma
Photon index:	     2.00 (+0.15, -0.14)
```
If the light curve continues to decay with a power-law decay index of 0.2, the count rate at T+24 hours will be 0.024 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 8.7 x 10^-13 (1.1 x 10^-12) erg cm^-2 s^-1.
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00590206.
This circular is an official product of the Swift-XRT team.
GCN Circular #15927
W. H. Baumgartner (GSFC/UMBC), S. D. Barthelmy (GSFC), J. R. Cummings (GSFC/UMBC), P. A. Evans (U Leicester), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), A. Y. Lien (NASA/UMBC), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU) (i.e. the Swift-BAT team):
Using the data set from T-61 to T+242 sec from recent telemetry downlinks, we report further analysis of BAT GRB 140304A (trigger #590206) (Evans, et al., GCN Circ. 15915). The BAT ground-calculated position is RA, Dec = 30.653, 33.480 deg, which is
```
   RA(J2000)  =  02h 02m 36.8s 
   Dec(J2000) = +33d 28' 47.4" 
```
with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 74%.
The mask-weighted light curve shows several overlapping peaks starting at ~T-10 sec, peaking at ~T+10 sec, and ending at ~T+30 sec. T90 (15-350 keV) is 15.6 +- 1.9 sec (estimated error including systematics).
The time-averaged spectrum from T-3.94 to T+15.77 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.29 +- 0.08. The fluence in the 15-150 keV band is 1.2 +- 0.1 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+10.22 sec in the 15-150 keV band is 1.7 +- 0.2 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/590206/BA/
GCN Circular #15928
Nat Butler (ASU), Alan M. Watson (UNAM), Alexander Kutyrev (GSFC), Willia= m H. Lee (UNAM), Michael G. Richer (UNAM), Chris Klein (UCB), Ori Fox (UCB)= , J. Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (ORAU/GSFC), Eleonora Troja (GSFC), Owen Littlejohns (ASU), Enrico Ramirez-Ruiz (UCSC), Jos=E9 A. de Diego (UNAM), Leonid Georgiev (UNAM), J= es=FAs Gonz=E1lez (UNAM), Carlos Rom=E1n-Z=FA=F1iga (UNAM), Neil Gehrels (GSFC),= and Harvey Moseley (GSFC) report:
We observed the field of GRB 140304A (Evans, et al., GCN 15915) with the Reionization and Transients Infrared Camera (RATIR; www.ratir.org) on the 1.5m Harold Johnson Telescope at the Observatorio Astron=F3mico Nacional = on Sierra San Pedro M=E1rtir from 2014/03 5.12 to 2014/03 5.16 UTC (13.50 to 14.40 hours after the BAT trigger), obtaining a total of 0.26 hours exposure in the g and r bands, 0.53 hours exposure in the i band, and 0.3= 0 hours exposure in the Z, Y, J, and H bands.
For a source within the Swift-XRT error circle (Evans, et al., GCN 15925)= , in comparison with the SDSS DR9 and 2MASS, we obtain the following detections and 3-sigma upper limit:
```
  g     > 23.07
  r     21.78 +/- 0.13
  i     20.66 +/- 0.06
  Z    19.45 +/- 0.05
  Y    19.19 +/- 0.06
  J     19.11 +/- 0.07
  H     18.71 +/- 0.08
```
These magnitudes are in the AB system and are not corrected for Galactic extinction in the direction of the GRB.
Using the procedure outlined in Littlejohns et al. 2013 (arXiv:1312.3967)= , we derive a photometric redshift z_phot =3D 5.45 (-0.2,+0.1; 90% confiden= ce). This photometric redshift is consistent with the one reported by de Ugarte-Postigo et al. (GCN 15921) and the spectroscopic redshift determinations by Jeong et al. (GCN 15922) and de Ugarte-Postigo et al. (GCN 15924).
We thank the staff of the Observatorio Astron=F3mico Nacional in San Pedr= o M=E1rtir.
GCN Circular #15930
T. Laskar, A. Zauderer, and E. Berger (Harvard) report:
"We observed the position of GRB 140304A (Evans et al; GCN 15915) with the VLA beginning on 2014 May 5.01 UT (0.45 days after the burst). At a mean frequency of 6 GHz, we detect a radio source with a preliminary flux density of ~ 0.05 mJy at
```
RA = 02:02:34.173 +/- 0.001
Dec = 33:28:26.01 +/- 0.02
```
consistent with the enhanced Swft/XRT position (Beardmore et al.; GCN 15925) and the optical position (Gorbovskoy et al.; GCN 15914). Follow-up observations are planned."
GCN Circular #15931
B. A. Zauderer, T. Laskar, and E. Berger (Harvard) report on behalf of the CARMA Key Project "A Millimeter View of the Transient Universe":
"We observed the position of GRB 140304A (Evans et al., GCN 15915) with the Combined Array for Research in Millimeter Astronomy (CARMA) beginning 2014 Mar 5.01 UT (10.8 hours post-burst) at a mean frequency of ~85 GHz.
We detect a radio source with a flux of ~0.5 mJy consistent with the enhanced Swift-XRT position (Beardmore et al., GCN 15925), the optical afterglow localization (Gorbovskoy et al., GCN 15914), and our VLA 5.8 GHz position (Laskar et al., GCN 15930). Follow-up observations are in progress.
We thank the CARMA staff and observers, Shaye Storm and Robin Dong, for their support of these rapid-response observations."
GCN Circular #15932
E. Gorbovskoy, V. Lipunov, M. Pruzhinskaya, D.Denisenko, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.V.Chazov, D.Kuvshinov Lomonosov Moscow State University, Sternberg Astronomical Institute
K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk Irkutsk State University
V.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov Blagoveschensk Educational State University, Blagoveschensk
A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik Kislovodsk Solar Station of the Pulkovo Observatory
V.Krushinski, I.Zalozhnih, A. Popov Ural Federal University, Kourovka
Hugo Levato and Carlos Saffe Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)
Claudio Mallamaci, Carlos Lopez and Federico Podest Observatorio Astronomico Felix Aguilar (OAFA)
MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in Tunka was pointed to the GRB140304A (Evans et. al GCN 15915) 26 sec after notice time and 77 sec after trigger time at 2014-03-04 13:23:49 UT. We detect OT (Gorbovskoy et. al GCN 15914) in two polarization bands during ~1 h while the source was brighter than our upper limit. The preliminary photometry result available in table 1 and here http://master.sai.msu.ru/static/GRB/grb140304A.png .
Table 1. Preliminary early GRB140304A observations.
```
T_start(JD)    T_trig-T_mid   Exptime   Mag1    Mag2   Coadd
2456721.05834       82            10    16.8    16.2    -
2456721.05931      172            30    17.2    16.9    -
2456721.06073      294            50    18.0    17.6    -
2456721.06142      358           120    18.1    17.6    2
2456721.06211      413            70    18.3    18.0    -
2456721.06724      894           580    18.5    18.5    4
2456721.08121      2070         1080    19.6    19.0    6
2456721.09812      3526         1080    19.9    19.4    6
```
Mag1 and Mag2 - Magnitude in two perpendicular polarizations. The power low index alpha is 0.77+-0.05 (F ~ t-apha).
MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in Blagoveschensk was pointed to the GRB140304A 5 sec after notice time and 46 sec after trigger time at 2014-03-04 13:23:17 UT. The observations on this site made on bad weather conditions and on high zenith distance. The 5-sigma upper limit On our first (10s exposure) image has been about 13.0 mag.
The message may be cited.
GCN Circular #15936
S. Jeong, R. S=E1nchez-Ram=EDrez (IAA-CSIC), J. Gorosabel (EHU-UPV, IAA-CSIC) and A. J. Castro-Tirado (IAA-CSIC, UMA), on behalf of a larger collaboration, report:
=93Once the calibration data have been available we have reduced again the optical spectrum taken with the 10.4 m GTC (+OSIRIS) starting aprox. 8.2 hr postburst. At the host galaxy location for GRB 140304A, we find a damped Ly-alpha system with log N(H) ~ 21.6 and z =3D 5.283. We also get the same redshift from its metal lines that we interpret as SII, SiII, SiII*, CII, CII*, SiIV and FeII. This value supersedes the preliminary measurement given in GCNC 15922 (Jeong et al.) and is consistent the one reported in GCNC 15924 (de Ugarte Postigo et al.).=94
GCN Circular #15937
Nat Butler (ASU), Alan M. Watson (UNAM), Alexander Kutyrev (GSFC), William H. Lee (UNAM), Michael G. Richer (UNAM), Chris Klein (UCB), Ori Fox (UCB) , J. Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (ORAU/GSFC), Eleonora Troja (GSFC), Owen Littlejohns (ASU), Enrico Ramirez-Ruiz (UCSC), Jos=E9 A. de Diego (UNAM), Leonid Georgiev (UNAM), Jes=FAs Gonz=E1lez (UNAM), Carlos Rom=E1n-Z=FA=F1iga (UNAM), Neil Gehrels (GSFC), and Harvey Moseley (GSFC) report:
We observed the field of GRB 140304A (Evans, et al., GCN 15915) with the Reionization and Transients Infrared Camera (RATIR; www.ratir.org) on the 1.5m Harold Johnson Telescope at the Observatorio Astron=F3mico Nacional = on Sierra San Pedro M=E1rtir from 2014/03 6.12 to 2014/03 6.14 UTC (37.55 to 38.08 hours after the BAT trigger), obtaining a total of 0.36 hours exposure in the r and i bands and 0.15 hours exposure in the Z, Y, J, and H bands.
For a source within the Swift-XRT error circle, in comparison with the SDSS DR9 and 2MASS, we obtain the following detection and upper limits (3-sigma):
```
  r     > 22.77
  i     > 22.60
  Z     20.88 +/- 0.20
  Y     > 20.96
  J     > 20.65
  H     > 20.31
```
These magnitudes are in the AB system and are not corrected for Galactic extinction in the direction of the GRB. In the Z-band, the source has faded as a powerlaw t^(-1.3) relative to our observations conducted last night (Butler et al., GCN 15928).
We thank the staff of the Observatorio Astron=F3mico Nacional in San Pedro M=E1rtir.
GCN Circular #15942
W. Iwakiri (RIKEN), M. Tashiro, Y. Terada, T. Yasuda, Y. Ishida, H. Ueno, S. Sugimoto, S. Koyama, S. Takeda, T. Nagayoshi (Saitama U.), M. Yamauchi, N. Ohmori, M. Akiyama, R. Kinoshita (Univ. of Miyazaki), M. Ohno, K. Takaki, T. Kawano, R. Nakamura, S. Furui, Y. Fukazawa (Hiroshima U.), K. Yamaoka (Nagoya U.), S. Sugita (Ehime U.), Y. E. Nakagawa, M. Kokubun, T. Takahashi (ISAS/JAXA), Y. Hanabata (ICRR), Y. Urata (NCU), K. Nakazawa, K. Makishima (Univ. of Tokyo) on behalf of the Suzaku WAM team, report:
The long GRB 140304A (Swift/BAT trigger #590206 ; Evans et al., GCN 15915; Fermi-GBM detection: Jenke and Fitzpatrick, GCN 15923) was detected by the the Suzaku Wide-band All-sky Monitor (WAM) which covers an energy range of 50 keV - 5 MeV at 13:22:33 UT (=T0).
The observed light curve shows a multi-peaked structure lasting from T0-3 s to T0+11 s with a duration (T90) of about 12 seconds. The fluence in 100 - 1000 keV was 1.69 (+0.32/-0.34) x10^-6 erg/cm^2. The 1-s peak flux measured from T0-1 s was 0.48 (+0.28, -0.23) photons/cm^2/s in the same energy range.
Preliminary result shows that the time-averaged spectrum from T0-3 s to T0+11 s is well fitted by a single power-law with a photon index of 2.09 (+0.66/-0.38) (chi^2/d.o.f = 12.3/14).
All the quoted errors are at statistical 90% confidence level, in which the systematic uncertainties are not included.
The light curves with 1-sec time resolution for this burst are available at:
http://www.astro.isas.jaxa.jp/suzaku/HXD-WAM/WAM-GRB/grb/untrig/grb_table.html

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Jochen Greiner, last update: 10-Mar-2014 [Disclaimer]