Gamma-ray Burst 120320A

(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 20 Mar 12 11:58:17 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     518200,   Seg_Num: 0
GRB_RA:          212.538d {+14h 10m 09s} (J2000),
                 212.689d {+14h 10m 45s} (current),
                 211.920d {+14h 07m 41s} (1950)
GRB_DEC:          +8.685d {+08d 41' 06"} (J2000),
                  +8.628d {+08d 37' 39"} (current),
                  +8.920d {+08d 55' 13"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       127222 [cnts]    Image_Peak=1373 [image_cnts]
TRIGGER_DUR:     26.880 [sec] 
TRIGGER_INDEX:   463     E_range: 15-50 keV
BKG_INTEN:       290136 [cnts]
BKG_TIME:        42863.98 SOD {11:54:23.98} UT
BKG_DUR:         64 [sec]
GRB_DATE:        16006 TJD;    80 DOY;   12/03/20
GRB_TIME:        42975.60 SOD {11:56:15.60} UT
GRB_PHI:         117.93 [deg]
GRB_THETA:        23.69 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     12.96 [sigma]
IMAGE_SIGNIF:    10.06 [sigma]
MERIT_PARAMS:     +1  +0  +0  +5  +1  +0  +0  +0 +83  +0 
SUN_POSTN:         0.26d {+00h 01m 02s}   +0.11d {+00d 06' 40"}
SUN_DIST:        146.53 [deg]   Sun_angle= 9.8 [hr] (West of Sun)
MOON_POSTN:      335.96d {+22h 23m 51s}   -4.61d {-04d 36' 19"}
MOON_DIST:       123.56 [deg]
MOON_ILLUM:      4 [%]
GAL_COORDS:      351.87, 63.80 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      207.17, 20.49 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This Notice was delayed by more than 60 sec past the end of the trigger integration interval;  
COMMENTS:        probably due to it occurring during a Malindi downlink session.  
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 = 232.47,18.71 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 20 Mar 12 12:03:45 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     518200,   Seg_Num: 0
POINT_RA:        212.567d {+14h 10m 16s} (J2000)
POINT_DEC:        +8.689d {+08d 41' 22"} (J2000)
ROLL:            76.357d
IMG_START_DATE:  16006 TJD;    80 DOY;   12/03/20
IMG_START_TIME:  43150.48 SOD {11:59:10.48} UT,   174.9 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     353937558
X_OFFSET:        601 [pixels]
Y_OFFSET:        948 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       761
Y_GRB_POS:       1108
BINNING_INDEX:   1
IM_URL:          sw00518200000msuni0183.fits
SUN_POSTN:         0.26d {+00h 01m 02s}   +0.11d {+00d 06' 46"}
SUN_DIST:        146.51 [deg]   Sun_angle= 9.8 [hr] (West of Sun)
MOON_POSTN:      336.01d {+22h 24m 02s}   -4.59d {-04d 35' 17"}
MOON_DIST:       123.57 [deg]
MOON_ILLUM:      4 [%]
GAL_COORDS:      351.92, 63.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      207.20, 20.50 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 20 Mar 12 12:00:42 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     518200,   Seg_Num: 0
GRB_RA:          212.538d {+14h 10m 09s} (J2000),
                 212.689d {+14h 10m 45s} (current),
                 211.920d {+14h 07m 41s} (1950)
GRB_DEC:          +8.685d {+08d 41' 06"} (J2000),
                  +8.628d {+08d 37' 39"} (current),
                  +8.920d {+08d 55' 13"} (1950)
GRB_DATE:        16006 TJD;    80 DOY;   12/03/20
GRB_TIME:        42975.60 SOD {11:56:15.60} UT
TRIGGER_INDEX:   463
GRB_PHI:         117.93 [deg]
GRB_THETA:        23.69 [deg]
DELTA_TIME:      39.00 [sec]
TRIGGER_DUR:     26.880 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     12.96 [sigma]
IMAGE_SIGNIF:    10.06 [sigma]
LC_URL:          sw00518200000msb.lc
SUN_POSTN:         0.26d {+00h 01m 02s}   +0.11d {+00d 06' 43"}
SUN_DIST:        146.53 [deg]   Sun_angle= 9.8 [hr] (West of Sun)
MOON_POSTN:      335.98d {+22h 23m 56s}   -4.60d {-04d 35' 52"}
MOON_DIST:       123.57 [deg]
MOON_ILLUM:      4 [%]
GAL_COORDS:      351.87, 63.80 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      207.17, 20.49 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Lightcurve.  
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 = 232.47,18.71 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 20 Mar 12 12:03:32 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     518200,   Seg_Num: 0
POINT_RA:        212.567d {+14h 10m 16s} (J2000)
POINT_DEC:        +8.689d {+08d 41' 22"} (J2000)
ROLL:            76.357d
IMG_START_DATE:  16006 TJD;    80 DOY;   12/03/20
IMG_START_TIME:  43150.48 SOD {11:59:10.48} UT,   174.9 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     353937558
X_OFFSET:        601 [pixels]
Y_OFFSET:        948 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       761
Y_GRB_POS:       1108
BINNING_INDEX:   1
IM_URL:          sw00518200000msuni0183.fits
SUN_POSTN:         0.26d {+00h 01m 02s}   +0.11d {+00d 06' 45"}
SUN_DIST:        146.50 [deg]   Sun_angle= 9.8 [hr] (West of Sun)
MOON_POSTN:      336.01d {+22h 24m 02s}   -4.59d {-04d 35' 19"}
MOON_DIST:       123.57 [deg]
MOON_ILLUM:      4 [%]
GAL_COORDS:      351.92, 63.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      207.20, 20.50 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 20 Mar 12 12:01:57 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     518200,   Seg_Num: 0
POINT_RA:        212.567d {+14h 10m 16s} (J2000)
POINT_DEC:        +8.689d {+08d 41' 22"} (J2000)
POINT_ROLL:      76.357d
IMG_START_DATE:  16006 TJD;    80 DOY;   12/03/20
IMG_START_TIME:  43150.48 SOD {11:59:10.48} UT,   174.9 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.159
N_STARS:         20
X_OFFSET:        282 [pixels]
Y_OFFSET:        629 [pixels]
X_MAX:           1241 [pixels]
Y_MAX:           1588 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00518200000msufc0174.fits
SUN_POSTN:         0.26d {+00h 01m 02s}   +0.11d {+00d 06' 44"}
SUN_DIST:        146.50 [deg]   Sun_angle= 9.8 [hr] (West of Sun)
MOON_POSTN:      335.99d {+22h 23m 59s}   -4.59d {-04d 35' 37"}
MOON_DIST:       123.56 [deg]
MOON_ILLUM:      4 [%]
GAL_COORDS:      351.92, 63.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      207.20, 20.50 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 20 Mar 12 11:59:18 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     518200,   Seg_Num: 0
POINT_RA:        212.566d {+14h 10m 16s} (J2000)
POINT_DEC:        +8.689d {+08d 41' 21"} (J2000)
IMG_START_DATE:  16006 TJD;    80 DOY;   12/03/20
IMG_START_TIME:  43147.30 SOD {11:59:07.30} UT,   171.7 [sec] since BAT Trigger Time
COUNTS:          3    Min_needed= 20
STD_DEV:         0.00   Max_StdDev_for_Good=28.44 [arcsec]
PH2_ITER:        1    Max_iter_allowed= 4
ERROR_CODE:      1
COMMENTS:        SWIFT-XRT Nack Position.  
COMMENTS:        No source found in the image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 20 Mar 12 12:02:21 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     518200,   Seg_Num: 0
POINT_RA:        212.567d {+14h 10m 16s} (J2000)
POINT_DEC:        +8.689d {+08d 41' 22"} (J2000)
POINT_ROLL:      76.357d
IMG_START_DATE:  16006 TJD;    80 DOY;   12/03/20
IMG_START_TIME:  43150.48 SOD {11:59:10.48} UT,   174.9 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.159
N_STARS:         20
X_OFFSET:        282 [pixels]
Y_OFFSET:        629 [pixels]
X_MAX:           1241 [pixels]
Y_MAX:           1588 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00518200000msufc0174.fits
SUN_POSTN:         0.26d {+00h 01m 02s}   +0.11d {+00d 06' 44"}
SUN_DIST:        146.50 [deg]   Sun_angle= 9.8 [hr] (West of Sun)
MOON_POSTN:      336.00d {+22h 23m 59s}   -4.59d {-04d 35' 33"}
MOON_DIST:       123.56 [deg]
MOON_ILLUM:      4 [%]
GAL_COORDS:      351.92, 63.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      207.20, 20.50 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 20 Mar 12 12:07:56 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     518200,   Seg_Num: 0
GRB_RA:          212.5183d {+14h 10m 04.39s} (J2000),
                 212.6692d {+14h 10m 40.61s} (current),
                 211.9008d {+14h 07m 36.18s} (1950)
GRB_DEC:          +8.6965d {+08d 41' 47.4"} (J2000),
                  +8.6392d {+08d 38' 21.1"} (current),
                  +8.9321d {+08d 55' 55.4"} (1950)
GRB_ERROR:       4.1 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  16006 TJD;    80 DOY;   12/03/20
IMG_START_TIME:  43161.00 SOD {11:59:21.00} UT,   185.4 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:         0.26d {+00h 01m 03s}   +0.11d {+00d 06' 50"}
SUN_DIST:        146.55 [deg]   Sun_angle= 9.8 [hr] (West of Sun)
MOON_POSTN:      336.04d {+22h 24m 10s}   -4.58d {-04d 34' 29"}
MOON_DIST:       123.65 [deg]
MOON_ILLUM:      4 [%]
GAL_COORDS:      351.85, 63.82 [deg] galactic lon,lat of the burst
ECL_COORDS:      207.15, 20.49 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
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 0.58% < P(seren) < 1.1%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 20 Mar 12 12:08:40 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     518200,   Seg_Num: 0
POINT_RA:        212.567d {+14h 10m 16s} (J2000)
POINT_DEC:        +8.688d {+08d 41' 16"} (J2000)
POINT_ROLL:      76.360d
IMG_START_DATE:  16006 TJD;    80 DOY;   12/03/20
IMG_START_TIME:  43308.85 SOD {12:01:48.85} UT,   333.2 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.605
N_STARS:         49
X_OFFSET:        42 [pixels]
Y_OFFSET:        389 [pixels]
X_MAX:           1481 [pixels]
Y_MAX:           1828 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00518200000msufc0333.fits
SUN_POSTN:         0.26d {+00h 01m 03s}   +0.11d {+00d 06' 51"}
SUN_DIST:        146.51 [deg]   Sun_angle= 9.8 [hr] (West of Sun)
MOON_POSTN:      336.05d {+22h 24m 12s}   -4.57d {-04d 34' 21"}
MOON_DIST:       123.61 [deg]
MOON_ILLUM:      4 [%]
GAL_COORDS:      351.92, 63.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      207.20, 20.50 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 20 Mar 12 12:08:58 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     518200,   Seg_Num: 0
POINT_RA:        212.567d {+14h 10m 16s} (J2000)
POINT_DEC:        +8.688d {+08d 41' 16"} (J2000)
POINT_ROLL:      76.360d
IMG_START_DATE:  16006 TJD;    80 DOY;   12/03/20
IMG_START_TIME:  43308.85 SOD {12:01:48.85} UT,   333.2 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.605
N_STARS:         49
X_OFFSET:        42 [pixels]
Y_OFFSET:        389 [pixels]
X_MAX:           1481 [pixels]
Y_MAX:           1828 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00518200000msufc0333.fits
SUN_POSTN:         0.26d {+00h 01m 03s}   +0.11d {+00d 06' 51"}
SUN_DIST:        146.51 [deg]   Sun_angle= 9.8 [hr] (West of Sun)
MOON_POSTN:      336.05d {+22h 24m 12s}   -4.57d {-04d 34' 17"}
MOON_DIST:       123.61 [deg]
MOON_ILLUM:      4 [%]
GAL_COORDS:      351.92, 63.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      207.20, 20.50 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 20 Mar 12 12:09:14 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     518200,   Seg_Num: 0
GRB_RA:          212.5176d {+14h 10m 04.22s} (J2000),
                 212.6685d {+14h 10m 40.44s} (current),
                 211.9001d {+14h 07m 36.02s} (1950)
GRB_DEC:          +8.6968d {+08d 41' 48.4"} (J2000),
                  +8.6395d {+08d 38' 22.1"} (current),
                  +8.9324d {+08d 55' 56.5"} (1950)
GRB_ERROR:       2.8 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  16006 TJD;    80 DOY;   12/03/20
IMG_START_TIME:  43161.00 SOD {11:59:21.00} UT,   185.4 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:         0.26d {+00h 01m 03s}   +0.11d {+00d 06' 51"}
SUN_DIST:        146.55 [deg]   Sun_angle= 9.8 [hr] (West of Sun)
MOON_POSTN:      336.05d {+22h 24m 13s}   -4.57d {-04d 34' 14"}
MOON_DIST:       123.66 [deg]
MOON_ILLUM:      4 [%]
GAL_COORDS:      351.85, 63.82 [deg] galactic lon,lat of the burst
ECL_COORDS:      207.15, 20.49 [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 0.58% < P(seren) < 1.1%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 20 Mar 12 12:10:09 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     518200,   Seg_Num: 0
POINT_RA:        212.567d {+14h 10m 16s} (J2000)
POINT_DEC:        +8.688d {+08d 41' 16"} (J2000)
ROLL:            76.360d
IMG_START_DATE:  16006 TJD;    80 DOY;   12/03/20
IMG_START_TIME:  43308.85 SOD {12:01:48.85} UT,   333.2 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     353937716
X_OFFSET:        601 [pixels]
Y_OFFSET:        948 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       761
Y_GRB_POS:       1108
BINNING_INDEX:   1
IM_URL:          sw00518200000msuni0342.fits
SUN_POSTN:         0.26d {+00h 01m 03s}   +0.11d {+00d 06' 52"}
SUN_DIST:        146.51 [deg]   Sun_angle= 9.8 [hr] (West of Sun)
MOON_POSTN:      336.06d {+22h 24m 14s}   -4.57d {-04d 34' 04"}
MOON_DIST:       123.62 [deg]
MOON_ILLUM:      4 [%]
GAL_COORDS:      351.92, 63.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      207.20, 20.50 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 20 Mar 12 12:10:30 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     518200,   Seg_Num: 0
POINT_RA:        212.567d {+14h 10m 16s} (J2000)
POINT_DEC:        +8.688d {+08d 41' 16"} (J2000)
ROLL:            76.360d
IMG_START_DATE:  16006 TJD;    80 DOY;   12/03/20
IMG_START_TIME:  43308.85 SOD {12:01:48.85} UT,   333.2 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     353937716
X_OFFSET:        601 [pixels]
Y_OFFSET:        948 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       761
Y_GRB_POS:       1108
BINNING_INDEX:   1
IM_URL:          sw00518200000msuni0342.fits
SUN_POSTN:         0.26d {+00h 01m 03s}   +0.11d {+00d 06' 52"}
SUN_DIST:        146.51 [deg]   Sun_angle= 9.8 [hr] (West of Sun)
MOON_POSTN:      336.06d {+22h 24m 15s}   -4.57d {-04d 34' 00"}
MOON_DIST:       123.62 [deg]
MOON_ILLUM:      4 [%]
GAL_COORDS:      351.92, 63.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      207.20, 20.50 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN Circular #13071
C. B. Markwardt (NASA/GSFC), W. H. Baumgartner (GSFC/UMBC), S. Campana (INAF-OAB), M. M. Chester (PSU), V. D'Elia (ASDC), P. A. Evans (U Leicester), B.P. Gompertz (U Leicester), C. Guidorzi (U Ferrara), J. A. Kennea (PSU), H. A. Krimm (CRESST/GSFC/USRA), N. P. M. Kuin (UCL-MSSL), O. M. Littlejohns (U Leicester), V. Mangano (INAF-IASFPA), F. E. Marshall (NASA/GSFC), A. Maselli (INAF-IASFPA), P. T. O'Brien (U Leicester), J. P. Osborne (U Leicester), C. Pagani (U Leicester), K. L. Page (U Leicester), J. L. Racusin (NASA/GSFC), P. Romano (INAF-IASFPA), T. Sakamoto (NASA/UMBC), B. Sbarufatti (INAF-OAB/PSU), M. H. Siegel (PSU), R. L. C. Starling (U Leicester), C. A. Swenson (PSU) and E. Troja (NASA/GSFC/ORAU) report on behalf of the Swift Team:
At 11:56:15 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 120320A (trigger=518200). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 212.538, +8.685 which is
```
   RA(J2000) = 14h 10m 09s
   Dec(J2000) = +08d 41' 06"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed what appears to be a series of peaks with a total duration of about 40 sec. The peak count rate was ~500 counts/sec (15-350 keV), at ~0 sec after the trigger.
The XRT began observing the field at 11:59:07.3 UT, 171.7 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source with an enhanced position: RA, Dec 212.5177, 8.6969 which is equivalent to:
```
   RA(J2000)  = 14h 10m 04.25s
   Dec(J2000) = +08d 41' 49.0"
```
with an uncertainty of 2.8 arcseconds (radius, 90% containment). This location is 83 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. We cannot determine whether the source is fading at the present time.
A power-law fit to a spectrum formed from promptly downlinked event data gives a column density consistent with the Galactic value of 2.02 x 10^20 cm^-2 (Kalberla et al. 2005).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 174 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers 84% of the XRT error circle. The typical 3-sigma upper limit has been about 19.6 mag. The 8'x8' region for the list of sources generated on-board covers 100% of the XRT error circle. The list of sources is typically complete to about 18 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.03.
Burst Advocate for this burst is C. B. Markwardt (Craig.Markwardt AT nasa.gov). 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 NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 20 Mar 12 12:13:51 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     518200,   Seg_Num: 0
POINT_RA:        212.567d {+14h 10m 16s} (J2000)
POINT_DEC:        +8.688d {+08d 41' 16"} (J2000)
POINT_ROLL:      76.359d
IMG_START_DATE:  16006 TJD;    80 DOY;   12/03/20
IMG_START_TIME:  43839.71 SOD {12:10:39.71} UT,   864.1 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.263
N_STARS:         60
X_OFFSET:        42 [pixels]
Y_OFFSET:        389 [pixels]
X_MAX:           1481 [pixels]
Y_MAX:           1828 [pixels]
DET_THRESH:      15
PHOTO_THRESH:    8
SL_URL:          sw00518200000msufc0864.fits
SUN_POSTN:         0.27d {+00h 01m 04s}   +0.12d {+00d 06' 56"}
SUN_DIST:        146.51 [deg]   Sun_angle= 9.8 [hr] (West of Sun)
MOON_POSTN:      336.09d {+22h 24m 22s}   -4.56d {-04d 33' 22"}
MOON_DIST:       123.65 [deg]
MOON_ILLUM:      4 [%]
GAL_COORDS:      351.92, 63.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      207.20, 20.50 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 20 Mar 12 12:14:06 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     518200,   Seg_Num: 0
POINT_RA:        212.567d {+14h 10m 16s} (J2000)
POINT_DEC:        +8.688d {+08d 41' 16"} (J2000)
POINT_ROLL:      76.359d
IMG_START_DATE:  16006 TJD;    80 DOY;   12/03/20
IMG_START_TIME:  43839.71 SOD {12:10:39.71} UT,   864.1 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.263
N_STARS:         60
X_OFFSET:        42 [pixels]
Y_OFFSET:        389 [pixels]
X_MAX:           1481 [pixels]
Y_MAX:           1828 [pixels]
DET_THRESH:      15
PHOTO_THRESH:    8
SL_URL:          sw00518200000msufc0864.fits
SUN_POSTN:         0.27d {+00h 01m 04s}   +0.12d {+00d 06' 56"}
SUN_DIST:        146.51 [deg]   Sun_angle= 9.8 [hr] (West of Sun)
MOON_POSTN:      336.09d {+22h 24m 22s}   -4.56d {-04d 33' 19"}
MOON_DIST:       123.65 [deg]
MOON_ILLUM:      4 [%]
GAL_COORDS:      351.92, 63.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      207.20, 20.50 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 20 Mar 12 12:15:29 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     518200,   Seg_Num: 0
POINT_RA:        212.567d {+14h 10m 16s} (J2000)
POINT_DEC:        +8.688d {+08d 41' 16"} (J2000)
ROLL:            76.359d
IMG_START_DATE:  16006 TJD;    80 DOY;   12/03/20
IMG_START_TIME:  43839.71 SOD {12:10:39.71} UT,   864.1 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     353938247
X_OFFSET:        601 [pixels]
Y_OFFSET:        948 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       761
Y_GRB_POS:       1108
BINNING_INDEX:   1
IM_URL:          sw00518200000msuni0873.fits
SUN_POSTN:         0.27d {+00h 01m 04s}   +0.12d {+00d 06' 57"}
SUN_DIST:        146.51 [deg]   Sun_angle= 9.8 [hr] (West of Sun)
MOON_POSTN:      336.10d {+22h 24m 25s}   -4.55d {-04d 33' 03"}
MOON_DIST:       123.66 [deg]
MOON_ILLUM:      4 [%]
GAL_COORDS:      351.92, 63.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      207.20, 20.50 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 20 Mar 12 12:15:49 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     518200,   Seg_Num: 0
POINT_RA:        212.567d {+14h 10m 16s} (J2000)
POINT_DEC:        +8.688d {+08d 41' 16"} (J2000)
ROLL:            76.359d
IMG_START_DATE:  16006 TJD;    80 DOY;   12/03/20
IMG_START_TIME:  43839.71 SOD {12:10:39.71} UT,   864.1 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     353938247
X_OFFSET:        601 [pixels]
Y_OFFSET:        948 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       761
Y_GRB_POS:       1108
BINNING_INDEX:   1
IM_URL:          sw00518200000msuni0873.fits
SUN_POSTN:         0.27d {+00h 01m 04s}   +0.12d {+00d 06' 58"}
SUN_DIST:        146.51 [deg]   Sun_angle= 9.8 [hr] (West of Sun)
MOON_POSTN:      336.11d {+22h 24m 26s}   -4.55d {-04d 33' 00"}
MOON_DIST:       123.66 [deg]
MOON_ILLUM:      4 [%]
GAL_COORDS:      351.92, 63.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      207.20, 20.50 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN Circular #13072
V.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov Blagoveschensk Educational State University, Blagoveschensk
K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk Irkutsk State University
E. Gorbovskoy, V. Lipunov, V.Kornilov, D.Kuvshinov, A.Belinski, N.Tyurina, N.Shatskiy, P.Balanutsa, D.Zimnukhov, A.Kuznetsov, V.V.Chazov, A.Kuznetsov, A.Sankovich Sternberg Astronomical Institute, Moscow State University
A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik Kislovodsk Solar Station of the Pulkovo Observatory
V.Krushinski, I.Zalozhnich, A. Popov, A. Bourdanov, A. Punanova Ural Federal University
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 Blagoveschensk was pointed to the GRB120320A (Markwardt et al., GCN 13071) 32 sec s after notice time and 156 sec after GRB time at 2012-03-20 11:58:51.633 UT. On our first (30s exposure) set we haven`t found optical transient within SWIFT BAT error-box (Markwardt et al., GCN 13071). The 5-sigma upper limit has been about 15.4 mag . The low limit is due to high zenit distance (8 degrees up to horizont).
The message may be cited.
GCN Circular #13075
A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team.
Using 995 s of XRT Photon Counting mode data and 2 UVOT images for GRB 120320A, 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 = 212.51794, +8.69646 which is equivalent to:
```
RA (J2000): 14h 10m 4.31s
Dec (J2000): +08d 41' 47.3"
```
with an uncertainty of 2.2 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 #13077
A. J. Levan (U. Warwick), N. R. Tanvir (U. Leicester), T. Wold (JACH) and R. Mason (Gemini) report on behalf of a larger collaboration:
We obtained observations of the field of GRB 120320A (Markwardt et al. GCN13071) with both Gemini-N/GMOS in i and z, and UKIRT/WFCAM in J, H and K. Our first observations began approximately 30 minutes after the burst, and continued for a further 2 hours.
Within the refined X-ray error circle (Beardmore et al. GCN 13075) we detect a very faint source in our GMOS imaging at position (accuracy ~0.5"):
```
RA(2000)=14:10:04.28
dec(2000)=08:41:47.9
```
The source has i~25.7+/-0.3 and z~25.3+/-0.3. It is undetected in the UKIRT imaging to preliminary limits of J>21.6, H>20.0 and K>19.5.
This source could therefore be related to either the afterglow or the host galaxy of GRB 120320A, but at the current time we cannot make any statements about fading.
GCN Circular #13079
A. Melandri (INAF-OAB), B. Sbarufatti (INAF-OAB/PSU), M.C. Stroh (PSU), D.N. Burrows (PSU), J.A. Kennea (PSU), P.A. Evans (U. Leicester), O.M. Littlejohns (U. Leicester), J.P. Osborne (U. Leicester), G. Stratta (ASDC) and C.B. Markwardt report on behalf of the Swift-XRT team:
We have analysed 7.5 ks of XRT data for GRB 120320A (Markwardt et al. GCN Circ. 13071), from 156 s to 24.3 ks after the BAT trigger. The data comprise 8 s in Windowed Timing (WT) mode (taken while Swift was slewing), with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Beardmore et al. (GCN. Circ 13075).
The light curve can be modelled with a power-law decay with a decay index of alpha=0.36 (+0.13, -0.15).
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 2.0 (+0.5, -0.4). The best-fitting absorption column is 1.7 (+1.4, -1.1) x 10^21 cm^-2, in excess of the Galactic value of 2.0 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 3.8 x 10^-11 (5.3 x 10^-11) erg cm^-2 count^-1.
```
A summary of the PC-mode spectrum is thus:
Total column:	     1.7 (+1.4, -1.1) x 10^21 cm^-2
Galactic foreground: 2.0 x 10^20 cm^-2
Excess significance: 2.1 sigma
Photon index:	     2.0 (+0.5, -0.4)
```
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00518200.
This circular is an official product of the Swift-XRT team.
GCN Circular #13080
J.C. Tello (IAA-CSIC), P. Kubanek (IP AS CR & IAA-CSIC), J. Gorosabel (IAA-CSIC), A.J. Castro-Tirado (IAA-CSIC), S. Guziy (Nikolaev St. Univ.), Yufeng Fan, Xiaohong Zhao, Jiming Bai (Yunnan National Astronomical Observatory) and Chenzhou Cui (Beinjing National Astronomical Observatory), report on behalf of a larger collaboration:
"We observed the field of GRB 120320A (Markwardt et al., GCNC 13071), detected by Swift/BAT, with the 0.6m BOOTES-4/MET telescope at the Lijiang Astronomical Observatory, China. Unfiltered images were obtained starting 13:48:44UT at high airmass (2h12m after the burst, limited by the local horizon). The resulting limiting magnitude (63 x 180s) is 16.3 when calibrated with the R1Mag value of USNO-B1.0 catalogue stars."
This message may be cited.
GCN Circular #13081
Brajesh Kumar, Vijay Kumar Bhatt and S.B. Pandey (ARIES, Nainital, India, on behalf of larger Indian GRB collaboration)
We observed the field of GRB 120320A (trigger=518200, Markwardt et al., GCN 13071) with the 1.04m telescope at ARIES Nainital starting at UT 18:39:42 on 20-03-2012. Three images in R_c pass-band (300 sec each) were obtained.
The photometry of the co-added R_c frame did not reveal any new source within the XRT error-box (Melandri et al., GCN 13079). The 3-sigma upper limit of the co-added frame was found to be ~ 19.5 mag. The photometry was done in comparison to nearby USNO- B1 stars.
This massage may be cited.
GCN Circular #13082
D. Kuroda, K. Yanagisawa, Y. Shimizu, H. Toda (OAO, NAOJ), S. Nagayama (NAOJ), M. Yoshida (Hiroshima), K. Ohta (Kyoto) and N. Kawai(Tokyo Tech) report on behalf of the MITSuME collaboration:
We observed the field of GRB 120320A (Markwardt et al., GCNC 13071) with the optical three color (g', Rc and Ic) CCD camera attached to the MITSuME 50cm telescope of Okayama Astrophysical Observatory.
The observation started on 2012-03-20 14:11:31 UT (~2.3 h after the burst) We did not find any new point source within the enhanced XRT circle (Beardmore et al., GCNC 13075) in all the three bands. We also could not detect the previously reported afterglow (Levan et al., GCNC 13077).
Three sigma upper limits of the OT are listed below. We used SDSS catalog for flux calibration.
```
T0+[day]   MID-UT   T-EXP[sec]    g'     Rc     Ic
------------------------------------------------------
0.13565    15:11:36    6360.0   >20.7  >20.7  >20.0
------------------------------------------------------
T0+ : Elapsed time after the burst [day]
T-EXP: Total Exposure time [sec]
```
GCN Circular #13083
M. M. Chester (PSU) and C. B. Markwardt (NASA/GSFC) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 120320A 175 s after the BAT trigger (Markwardt et al., GCN Circ 13071). No optical afterglow consistent with the enhanced XRT position (Beardmore et al., GCN Circ 13075) or optical candidate reported by Levan et al. (GCN Circ 13077) 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
White_FC    175          325        147      >20.9
White       175        11021       1435      >22.1		
v           663         6181        452      >19.8		
b           589         6965        416      >20.4		
u           333         6796        678      >20.6		
uvw1        713         6591        432      >20.4		
uvm2        688         6386        432      >20.4		
uvw2        639        11148        570      >20.9
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.03 in the direction of the burst (Schlegel et al. 1998).

GCN Circular #13086
V. Golovnya, A. Yatsenko, L. Pakuliak (Main Astro Obs, Kyiv) report:
We have undertaken the review of the sky area in vicinity of=20 GRB 120320A (A.P. Beardmore et al. GCN Circ.13075) on=20 astronegatives, collected in Ukrainian NAS Main astronomical=20 observatory plate archive (1976-1996). All the plates with=20 the possible object appearance are digitized using Microtek=20 ScanMaker 9800XL TMA and Epson Expression 10000XL flatbed=20 scanners and have been placed into Golosiiv Plate Archive=20 database DBGPA with open access to them.

 	The list of plates is given in the table:
YYYYMMDD/TimeUT	--Plates--	Exp.	LimMag	Star USNOA2=20
19820304/012601	GUA040C000022A	22.5	16.30	0975-07400209
19820304/012601	GUA040D000023A	22.5	15.25	0975-07399206
19820513/204316	GUA040C002367	59.8	16.90	0975-07398764
19820513/204322	GUA040D002368	59.7	15.65	0975-07399102
19830510/214749	GUA040C002451	32.5	15.25	0975-07399206
19900223/015615	GUA040C001585A	20.0	15.65	0975-07399102
19900301/014633	GUA040C001620	16.0	15.65	0975-07399102
19910411/231232	GUA040C001778A	22.5	15.65	0975-07399102
19910512/205130	GUA040C001783	18.0	15.25	0975-07399206
Plates: =96the plates archive identifier of DWA (D/F=3D400/2000,=20
GUA040C, M=3D103"/mm) of the Ukrainian NAS Main Astro obs.
GUA040D (Marsden's number - 83) the plate number [1].
Exp.   - Duration of the maximum exposure (minutes).=20
LimM   - Limited V mag, derived in the 28 minutes area around=20
     the location given in A. Beardmore et al. GCN Circ.13075:=20
       RA(J2000)=3D 14h 10m 04.31s, Dec(J2000)=3D +08d 41' 47.3"
Star USNOA2 - Comparison star.

The preview images of 9 areas together with =20 the 28x28 min.of arc area from SkyMap can be found in =20 http://gua.db.ukr-vo.org/img/grb/120320A/index.html The images with full resolution are available via e-mail on=20 demand. References:
1.L.Pakuliak DATABASE of GOLOSIIV PLATE ARCHIVE (DBGPA V2.0), http://gua.db.ukr-vo.org

GCN Circular #13087
D. Macpherson (UWA/ICRAR), D. Coward (UWA), A. Klotz (IRAP-CNRS-OMP), B. Gendre (ASDC/INAF-OAR), M. Todd (Curtin-ICRAR), M. Boer (UNS-CNRS-OCA), A. Williams (PO-UWA), R. Martin (PO-UWA) report:
We imaged the field of GRB 120320A detected by SWIFT (trigger 518200) with the UWA Zadko robotic telescope (D=100cm) located at Gingin, Australia.
The observations started 6.8 hr after the GRB trigger. The elevation of the field was 49 deg and humid= 63%.
9 images have been maded with a duration of 180.0s each. At the position of the XRT afterglow (Beardmore et al., GCN 13075), we do not detect any source with a limiting magnitude of r = 20.7 on the summed images.
The nearest object, which is about 14 arcsec, in our summed image to the XRT location, is a SDSS galaxy (J141005.65+084149.2 ) with a photometric z = 0.34 +- 0.167.
This message may be cited.
GCN Circular #13198
A.Volnova (SAI MSU), =A0E. Sinyakov (ISON), D. Varda (ISON), I. Molotov (KIAM), =A0A. Pozanenko (IKI) on behalf of =A0larger GRB follow up =A0collaboration rep= ort:
We observed the field of the Swift GRB 120320A =A0(Markwardt =A0et al., GCN 13071) with ORI-25 (0.25-m) telescope of=A0ISON-Blagoveschensk observatory. We took several unfiltered images of =A060 s exposure on Mar.20, starting (UT) 12:06:10, i.e. 10 min after trigger.
Within enhanced XRT position (Beardmore et al., =A0GCN 13075) we do not detect any =A0source in different combined images. Photometry is based on nearby USNO-B1.0 stars, R2-values.
```
UT start, =A0 =A0t-t0 =A0 =A0 =A0 =A0 =A0 filter =A0 =A0 =A0Exp. =A0 =A0 =
=A0 =A0OT =A0 =A0 =A0UL (3 sigma)
=A0 =A0 =A0 =A0 =A0 =A0 =A0 (mid, days) =A0 =A0 =A0 =A0 =A0 =A0 (s)

12:06:10 =A00.00874 =A0 =A0none =A0 =A0 10x30 =A0 =A0 =A0 n/d =A0 =A0 =A0=
16.7
12:06:10 =A00.08435 =A0 =A0none =A0 360x30 =A0 =A0 =A0 n/d =A0 =A0 =A019.=
2
```
GCN Circular #13199
A.Volnova (SAI MSU), =A0I. Korobtsev, E. Klunko (ISTP), A. Pozanenko (IKI) on behalf of =A0larger GRB follow up collaboration report:
We observed the field of the Swift GRB 120320A =A0(Markwardt =A0et al., GCN 13071) with AZT-33IK telescope of Sayan observatory (Mondy) =A0on Mar. 20 under mean seeing 2.6 arcsec. We took several images in R-filter of =A060 s exposure on Mar.20, between (UT) 14:45:13 - 15:58:25.
Within enhanced XRT position (Beardmore et al., =A0GCN 13075) we do not detect any =A0source in a combined image. Photometry is based on nearby USNO-B1.0 stars, R2-values.
```
UT start, =A0 =A0t-t0 =A0 =A0 =A0 =A0 =A0 filter =A0 =A0 =A0Exp. =A0 =A0 =
=A0 =A0OT =A0 =A0 =A0UL (3 sigma)
=A0 =A0 =A0 =A0 =A0 =A0 =A0 (mid, days) =A0 =A0 =A0 =A0 =A0 =A0 (s)

14:45:13 =A0 0.14275 =A0 =A0R =A0 =A0 =A0 72x60 =A0 =A0 =A0 =A0 n/d =A0 =A0=
 =A021.3
```

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Jochen Greiner, last update: 03-Apr-2012 [Disclaimer]