Gamma-ray Burst 160314A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 14 Mar 16 11:33:30 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     679120,   Seg_Num: 0
GRB_RA:          112.781d {+07h 31m 07s} (J2000),
                 113.014d {+07h 32m 03s} (current),
                 112.061d {+07h 28m 15s} (1950)
GRB_DEC:         +17.001d {+17d 00' 03"} (J2000),
                 +16.966d {+16d 57' 57"} (current),
                 +17.107d {+17d 06' 26"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       8856 [cnts]    Image_Peak=294 [image_cnts]
TRIGGER_DUR:     2.048 [sec] 
TRIGGER_INDEX:   443     E_range: 15-50 keV
BKG_INTEN:       87738 [cnts]
BKG_TIME:        41536.02 SOD {11:32:16.02} UT
BKG_DUR:         24 [sec]
GRB_DATE:        17461 TJD;    74 DOY;   16/03/14
GRB_TIME:        41571.79 SOD {11:32:51.79} UT
GRB_PHI:          61.54 [deg]
GRB_THETA:        19.70 [deg]
SOLN_STATUS:     0x2003
RATE_SIGNIF:     14.17 [sigma]
IMAGE_SIGNIF:    8.54 [sigma]
MERIT_PARAMS:     +1  +0  +0  +1  +1  -1  +0  +0 +45  +0 
SUN_POSTN:       354.79d {+23h 39m 09s}   -2.26d {-02d 15' 17"}
SUN_DIST:        117.61 [deg]   Sun_angle= -7.9 [hr] (East of Sun)
MOON_POSTN:       67.61d {+04h 30m 27s}  +16.65d {+16d 39' 18"}
MOON_DIST:        43.36 [deg]
MOON_ILLUM:      37 [%]
GAL_COORDS:      201.82, 16.26 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      111.81, -4.73 [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:        There is a bright star (mag=5.42) 11.06 arcmin from this position.  
COMMENTS:        This is a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 103.35,-6.38 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 14 Mar 16 11:34:29 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     679120,   Seg_Num: 0
POINT_RA:        112.757d {+07h 31m 02s} (J2000)
POINT_DEC:       +16.998d {+16d 59' 53"} (J2000)
IMG_START_DATE:  17461 TJD;    74 DOY;   16/03/14
IMG_START_TIME:  41662.75 SOD {11:34:22.75} UT,   91.0 [sec] since BAT Trigger Time
COUNTS:          1    Min_needed= 20
STD_DEV:         0.00   Max_StdDev_for_Good=28.44 [arcsec]
PH2_ITER:        0    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:     Mon 14 Mar 16 11:36:45 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     679120,   Seg_Num: 0
GRB_RA:          112.781d {+07h 31m 07s} (J2000),
                 113.014d {+07h 32m 03s} (current),
                 112.061d {+07h 28m 15s} (1950)
GRB_DEC:         +17.001d {+17d 00' 03"} (J2000),
                 +16.966d {+16d 57' 57"} (current),
                 +17.107d {+17d 06' 26"} (1950)
GRB_DATE:        17461 TJD;    74 DOY;   16/03/14
GRB_TIME:        41571.79 SOD {11:32:51.79} UT
TRIGGER_INDEX:   443
GRB_PHI:          61.54 [deg]
GRB_THETA:        19.70 [deg]
DELTA_TIME:      -56.00 [sec]
TRIGGER_DUR:     2.048 [sec] 
SOLN_STATUS:     0x2003
RATE_SIGNIF:     14.17 [sigma]
IMAGE_SIGNIF:    8.54 [sigma]
LC_URL:          sw00679120000msb.lc
SUN_POSTN:       354.79d {+23h 39m 09s}   -2.25d {-02d 15' 14"}
SUN_DIST:        117.61 [deg]   Sun_angle= -7.9 [hr] (East of Sun)
MOON_POSTN:       67.64d {+04h 30m 35s}  +16.66d {+16d 39' 32"}
MOON_DIST:        43.33 [deg]
MOON_ILLUM:      37 [%]
GAL_COORDS:      201.82, 16.26 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      111.81, -4.73 [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:        There is a bright star (mag=5.42) 11.06 arcmin from this position.  
COMMENTS:        This is a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 103.35,-6.38 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 14 Mar 16 11:38:33 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     679120,   Seg_Num: 0
GRB_RA:          112.7912d {+07h 31m 09.88s} (J2000),
                 113.0241d {+07h 32m 05.79s} (current),
                 112.0717d {+07h 28m 17.21s} (1950)
GRB_DEC:         +16.9996d {+16d 59' 58.5"} (J2000),
                 +16.9645d {+16d 57' 52.1"} (current),
                 +17.1058d {+17d 06' 21.0"} (1950)
GRB_ERROR:       3.7 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  17461 TJD;    74 DOY;   16/03/14
IMG_START_TIME:  41676.00 SOD {11:34:36.00} UT,   104.2 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       354.79d {+23h 39m 10s}   -2.25d {-02d 15' 12"}
SUN_DIST:        117.62 [deg]   Sun_angle= -7.9 [hr] (East of Sun)
MOON_POSTN:       67.66d {+04h 30m 39s}  +16.66d {+16d 39' 40"}
MOON_DIST:        43.32 [deg]
MOON_ILLUM:      37 [%]
GAL_COORDS:      201.82, 16.27 [deg] galactic lon,lat of the burst
ECL_COORDS:      111.82, -4.73 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        There is a bright star (mag=5.42) 10.57 arcmin from the XRT position.  
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:     Mon 14 Mar 16 11:39:57 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     679120,   Seg_Num: 0
POINT_RA:        112.754d {+07h 31m 01s} (J2000)
POINT_DEC:       +16.997d {+16d 59' 49"} (J2000)
POINT_ROLL:      276.440d
IMG_START_DATE:  17461 TJD;    74 DOY;   16/03/14
IMG_START_TIME:  41723.03 SOD {11:35:23.03} UT,   151.2 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.728
N_STARS:         190
X_OFFSET:        102 [pixels]
Y_OFFSET:        444 [pixels]
X_MAX:           1541 [pixels]
Y_MAX:           1883 [pixels]
DET_THRESH:      8
PHOTO_THRESH:    3
SL_URL:          sw00679120000msufc0151.fits
SUN_POSTN:       354.79d {+23h 39m 10s}   -2.25d {-02d 15' 11"}
SUN_DIST:        117.58 [deg]   Sun_angle= -7.9 [hr] (East of Sun)
MOON_POSTN:       67.68d {+04h 30m 42s}  +16.66d {+16d 39' 46"}
MOON_DIST:        43.27 [deg]
MOON_ILLUM:      37 [%]
GAL_COORDS:      201.81, 16.23 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      111.79, -4.74 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.  
COMMENTS:        There is a bright star (mag=5.42) 11.06 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 14 Mar 16 11:40:33 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     679120,   Seg_Num: 0
GRB_RA:          112.7891d {+07h 31m 09.38s} (J2000),
                 113.0220d {+07h 32m 05.28s} (current),
                 112.0696d {+07h 28m 16.71s} (1950)
GRB_DEC:         +16.9987d {+16d 59' 55.3"} (J2000),
                 +16.9636d {+16d 57' 48.9"} (current),
                 +17.1049d {+17d 06' 17.7"} (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:  17461 TJD;    74 DOY;   16/03/14
IMG_START_TIME:  41676.00 SOD {11:34:36.00} UT,   104.2 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       354.79d {+23h 39m 10s}   -2.25d {-02d 15' 10"}
SUN_DIST:        117.62 [deg]   Sun_angle= -7.9 [hr] (East of Sun)
MOON_POSTN:       67.68d {+04h 30m 44s}  +16.66d {+16d 39' 49"}
MOON_DIST:        43.30 [deg]
MOON_ILLUM:      37 [%]
GAL_COORDS:      201.82, 16.26 [deg] galactic lon,lat of the burst
ECL_COORDS:      111.82, -4.73 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        There is a bright star (mag=5.42) 10.70 arcmin from the XRT position.  
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:     Mon 14 Mar 16 11:40:29 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     679120,   Seg_Num: 0
POINT_RA:        112.754d {+07h 31m 01s} (J2000)
POINT_DEC:       +16.997d {+16d 59' 49"} (J2000)
POINT_ROLL:      276.440d
IMG_START_DATE:  17461 TJD;    74 DOY;   16/03/14
IMG_START_TIME:  41723.03 SOD {11:35:23.03} UT,   151.2 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.728
N_STARS:         190
X_OFFSET:        102 [pixels]
Y_OFFSET:        444 [pixels]
X_MAX:           1541 [pixels]
Y_MAX:           1883 [pixels]
DET_THRESH:      8
PHOTO_THRESH:    3
SL_URL:          sw00679120000msufc0151.fits
SUN_POSTN:       354.79d {+23h 39m 10s}   -2.25d {-02d 15' 10"}
SUN_DIST:        117.58 [deg]   Sun_angle= -7.9 [hr] (East of Sun)
MOON_POSTN:       67.68d {+04h 30m 44s}  +16.66d {+16d 39' 49"}
MOON_DIST:        43.27 [deg]
MOON_ILLUM:      37 [%]
GAL_COORDS:      201.81, 16.23 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      111.79, -4.74 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.  
COMMENTS:        There is a bright star (mag=5.42) 11.06 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 14 Mar 16 11:42:58 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     679120,   Seg_Num: 0
POINT_RA:        112.754d {+07h 31m 01s} (J2000)
POINT_DEC:       +16.997d {+16d 59' 49"} (J2000)
ROLL:            276.440d
IMG_START_DATE:  17461 TJD;    74 DOY;   16/03/14
IMG_START_TIME:  41723.03 SOD {11:35:23.03} UT,   151.2 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     479648139
X_OFFSET:        661 [pixels]
Y_OFFSET:        1003 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       821
Y_GRB_POS:       1163
BINNING_INDEX:   1
IM_URL:          sw00679120000msuni0167.fits
SUN_POSTN:       354.79d {+23h 39m 10s}   -2.25d {-02d 15' 08"}
SUN_DIST:        117.58 [deg]   Sun_angle= -7.9 [hr] (East of Sun)
MOON_POSTN:       67.71d {+04h 30m 50s}  +16.67d {+16d 39' 60"}
MOON_DIST:        43.24 [deg]
MOON_ILLUM:      37 [%]
GAL_COORDS:      201.81, 16.23 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      111.79, -4.74 [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).  
COMMENTS:        There is a bright star (mag=5.42) 11.06 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 14 Mar 16 11:43:15 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     679120,   Seg_Num: 0
POINT_RA:        112.754d {+07h 31m 01s} (J2000)
POINT_DEC:       +16.997d {+16d 59' 49"} (J2000)
ROLL:            276.440d
IMG_START_DATE:  17461 TJD;    74 DOY;   16/03/14
IMG_START_TIME:  41723.03 SOD {11:35:23.03} UT,   151.2 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     479648139
X_OFFSET:        661 [pixels]
Y_OFFSET:        1003 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       821
Y_GRB_POS:       1163
BINNING_INDEX:   1
IM_URL:          sw00679120000msuni0167.fits
SUN_POSTN:       354.79d {+23h 39m 10s}   -2.25d {-02d 15' 08"}
SUN_DIST:        117.58 [deg]   Sun_angle= -7.9 [hr] (East of Sun)
MOON_POSTN:       67.71d {+04h 30m 50s}  +16.67d {+16d 40' 01"}
MOON_DIST:        43.24 [deg]
MOON_ILLUM:      37 [%]
GAL_COORDS:      201.81, 16.23 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      111.79, -4.74 [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.  
COMMENTS:        There is a bright star (mag=5.42) 11.06 arcmin from the BAT position.

GCN Circular #19182
V. D'Elia (ASDC), A. A. Breeveld (UCL-MSSL), P.A. Evans (U Leicester), L. Izzo (URoma1), J. A. Kennea (PSU), A. Y. Lien (GSFC/UMBC), F. E. Marshall (NASA/GSFC), K. L. Page (U Leicester) and B. Sbarufatti (INAF-OAB/PSU) report on behalf of the Swift Team:
At 11:32:51 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 160314A (trigger=679120). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 112.781, +17.001 which is
```
   RA(J2000) = 07h 31m 07s
   Dec(J2000) = +17d 00' 03"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a multi-peaked structure with a duration of about 20 sec. The peak count rate was ~1700 counts/sec (15-350 keV), at ~1 sec after the trigger.
The XRT began observing the field at 11:34:22.7 UT, 91.0 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source with an enhanced position: RA, Dec 112.7891, 16.9987 which is equivalent to:
```
   RA(J2000)  = 07h 31m 09.39s
   Dec(J2000) = +16d 59' 55.5"
```
with an uncertainty of 2.1 arcseconds (radius, 90% containment). This location is 29 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. No spectrum from the promptly downlinked event data is yet available to determine the column density.
UVOT took a finding chart exposure of 250 seconds with the U filter starting 151 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 100% of the XRT error circle. The typical 3-sigma upper limit has been about 19.2 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 18.0 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.08.
Burst Advocate for this burst is V. D'Elia (delia AT asdc.asi.it). 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:     Mon 14 Mar 16 11:50:04 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     679120,   Seg_Num: 0
POINT_RA:        112.754d {+07h 31m 01s} (J2000)
POINT_DEC:       +16.997d {+16d 59' 50"} (J2000)
POINT_ROLL:      276.440d
IMG_START_DATE:  17461 TJD;    74 DOY;   16/03/14
IMG_START_TIME:  42424.41 SOD {11:47:04.41} UT,   852.6 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.472
N_STARS:         190
X_OFFSET:        102 [pixels]
Y_OFFSET:        444 [pixels]
X_MAX:           1541 [pixels]
Y_MAX:           1883 [pixels]
DET_THRESH:      6
PHOTO_THRESH:    3
SL_URL:          sw00679120000msufc0852.fits
SUN_POSTN:       354.80d {+23h 39m 11s}   -2.25d {-02d 15' 01"}
SUN_DIST:        117.58 [deg]   Sun_angle= -7.9 [hr] (East of Sun)
MOON_POSTN:       67.78d {+04h 31m 07s}  +16.68d {+16d 40' 31"}
MOON_DIST:        43.18 [deg]
MOON_ILLUM:      37 [%]
GAL_COORDS:      201.81, 16.23 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      111.79, -4.74 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.  
COMMENTS:        There is a bright star (mag=5.42) 11.06 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 14 Mar 16 11:50:14 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     679120,   Seg_Num: 0
POINT_RA:        112.754d {+07h 31m 01s} (J2000)
POINT_DEC:       +16.997d {+16d 59' 50"} (J2000)
POINT_ROLL:      276.440d
IMG_START_DATE:  17461 TJD;    74 DOY;   16/03/14
IMG_START_TIME:  42424.41 SOD {11:47:04.41} UT,   852.6 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.472
N_STARS:         190
X_OFFSET:        102 [pixels]
Y_OFFSET:        444 [pixels]
X_MAX:           1541 [pixels]
Y_MAX:           1883 [pixels]
DET_THRESH:      6
PHOTO_THRESH:    3
SL_URL:          sw00679120000msufc0852.fits
SUN_POSTN:       354.80d {+23h 39m 11s}   -2.25d {-02d 15' 01"}
SUN_DIST:        117.58 [deg]   Sun_angle= -7.9 [hr] (East of Sun)
MOON_POSTN:       67.78d {+04h 31m 07s}  +16.68d {+16d 40' 32"}
MOON_DIST:        43.17 [deg]
MOON_ILLUM:      37 [%]
GAL_COORDS:      201.81, 16.23 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      111.79, -4.74 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.  
COMMENTS:        There is a bright star (mag=5.42) 11.06 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 14 Mar 16 11:51:12 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     679120,   Seg_Num: 0
POINT_RA:        112.754d {+07h 31m 01s} (J2000)
POINT_DEC:       +16.997d {+16d 59' 50"} (J2000)
ROLL:            276.440d
IMG_START_DATE:  17461 TJD;    74 DOY;   16/03/14
IMG_START_TIME:  42424.41 SOD {11:47:04.41} UT,   852.6 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     479648840
X_OFFSET:        661 [pixels]
Y_OFFSET:        1003 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       821
Y_GRB_POS:       1163
BINNING_INDEX:   1
IM_URL:          sw00679120000msuni0868.fits
SUN_POSTN:       354.80d {+23h 39m 12s}   -2.25d {-02d 15' 00"}
SUN_DIST:        117.58 [deg]   Sun_angle= -7.9 [hr] (East of Sun)
MOON_POSTN:       67.79d {+04h 31m 10s}  +16.68d {+16d 40' 37"}
MOON_DIST:        43.16 [deg]
MOON_ILLUM:      37 [%]
GAL_COORDS:      201.81, 16.23 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      111.79, -4.74 [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).  
COMMENTS:        There is a bright star (mag=5.42) 11.06 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 14 Mar 16 11:51:20 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     679120,   Seg_Num: 0
POINT_RA:        112.754d {+07h 31m 01s} (J2000)
POINT_DEC:       +16.997d {+16d 59' 50"} (J2000)
ROLL:            276.440d
IMG_START_DATE:  17461 TJD;    74 DOY;   16/03/14
IMG_START_TIME:  42424.41 SOD {11:47:04.41} UT,   852.6 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     479648840
X_OFFSET:        661 [pixels]
Y_OFFSET:        1003 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       821
Y_GRB_POS:       1163
BINNING_INDEX:   1
IM_URL:          sw00679120000msuni0868.fits
SUN_POSTN:       354.80d {+23h 39m 12s}   -2.25d {-02d 15' 00"}
SUN_DIST:        117.58 [deg]   Sun_angle= -7.9 [hr] (East of Sun)
MOON_POSTN:       67.79d {+04h 31m 10s}  +16.68d {+16d 40' 37"}
MOON_DIST:        43.16 [deg]
MOON_ILLUM:      37 [%]
GAL_COORDS:      201.81, 16.23 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      111.79, -4.74 [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.  
COMMENTS:        There is a bright star (mag=5.42) 11.06 arcmin from the BAT position.

GCN Circular #19183
D. Xu (NAOC/CAS), Y.-D. Hu (IAA-CSIC), Y. Qing (Geneva Observatory), Y.-H. Han (NAOC/CAS, HUST), C.-M. Zhang, S.-M. Hu, C. Cao (SDU) report:
We observed the field of GRB 160314A (D'Elia et al., GCN 19182) using the 1-m telescope located at Weihai, Shandong, China. Observations started at 11:51:15 UT on 2016-03-14 (i.e., 18.4 min after the burst) in cloudy weather, and 4x300s R-band frames were obtained.
No optical source is detected within the XRT error circle (D'Elia et al., GCN 19182), down to a limiting magnitude of m(R)~19.0, calibrated with the SDSS field.
GCN Circular #19184
A. Volnova (IKI), E. Chornaya (UAFO), E. Mazaeva (IKI), A. Matkin (UAFO, ISON), I. Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration:
We observed the field of the GRB 160314A (D'Elia et al., GCN 19182) with SANTEL-650 (0.65m) telescope of UAFO/ISON-Ussuriysk observatory starting on March, 14 (UT) 11:32:51. We obtained series of unfiltered images of 30 s exposure. We do not detect any optical afterglow within XRT error circle (D'Elia et al., GCN 19182). Photometry of a combined image of few first frames is following
```
Date       UT start  t-T0   Filter  Exp.  OT     U_limit (3sigma)
                      (mid, days)    (s)

2016-03-14 11:32:51  0.01728 none   3*30  n/d    18.7
```
The photometry is based on nearby SDSS star J073110.29+170129.9 assuming R_Lupton = 16.132.
GCN Circular #19185
J.P. Osborne, A.P. Beardmore, P.A. Evans and M.R. Goad (U. Leicester) report on behalf of the Swift-XRT team.
Using 1542 s of XRT Photon Counting mode data and 2 UVOT images for GRB 160314A, 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 = 112.79093, +16.99938 which is equivalent to:
```
RA (J2000): 07h 31m 9.82s
Dec (J2000): +16d 59' 57.8"
```
with an uncertainty of 3.2 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 #19187
M. H. Siegel (PSU) and V. D'Elia (ASDC) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 160314A 151 s after the BAT trigger (D'Elia et al., GCN Circ. 19182). A source consistent with the XRT position (Osborne et al. GCN Circ. 19185) is detected in the initial UVOT exposures.
The preliminary UVOT position is:
```
  RA  (J2000) =  07:31:09.73 = 112.79053 (deg.)
  Dec (J2000) = +16:59:59.1  =  16.99974 (deg.)
```
with an estimated uncertainty of 0.63 arc sec. (radius, 90% confidence).
Preliminary detections and 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the early exposures are:
```
Filter         T_start(s)   T_stop(s)      Exp(s)           Mag

v                  457         1825          175        >19.6
b                  407         1775          175        >19.6
u                  151          401          246         19.14 +/- 0.16
w1                 506         1726          156        >18.8
m2                 481         1849          174        >19.2
w2                 432         1801          175        >19.3
```
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).
GCN Circular #19188
J. R. Cummings (GSFC/UMBC), S. D. Barthelmy (GSFC), V. D'Elia (ASDC), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), M. Stamatikos (OSU), T. N. Ukwatta (LANL) (i.e. the Swift-BAT team):
Using the data set from T-240 to T+962 sec from the recent telemetry downlink, we report further analysis of BAT GRB 160314A (trigger #679120) (D'Elia et al., GCN Circ. 19182). The BAT ground-calculated position is RA, Dec = 112.766, 17.024 deg which is
```
  RA(J2000)  =  07h 31m 03.9s
  Dec(J2000) = +17d 01' 24.7"
```
with an uncertainty of 1.7 arcmin, (radius, sys+stat, 90% containment). The partial coding was 75%.
The mask-weighted light curve shows a single-pulse structure that starts at ~ T0, peaks at ~ T+1 s, and ends at ~ T+9 s. T90 (15-350 keV) is 8.73 +- 1.52 sec (estimated error including systematics).
The time-averaged spectrum from T-0.04 to T+9.31 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.53 +- 0.22. The fluence in the 15-150 keV band is 2.8 +- 0.4 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T+1.12 sec in the 15-150 keV band is 0.9 +- 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/679120/BA/
GCN Circular #19189
A. de Ugarte Postigo (IAA-CSIC, DARK/NBI), F. Aceituno (IAA-CSIC), C.C. Thoene (IAA-CSIC), L. Izzo (Uroma1), Z. Cano (U. Iceland) report:
We observed the field of GRB 160314A (D=E2=80=99Elia et al., GCN 19182) w= ith the 1.5 m=20 Telescope at the Sierra Nevada Observatory, starting at 19:07 UT (7.57 hr= after the burst). Observations were performed under non-optimal conditions, being a= ffected=20 by passing clouds. In a 5x300s exposure obtained in R-band we do not dete= ct=20 the optical counterpart candidate (Siegel et al, GCN 19187) down to a 3-s= igma=20 limiting magnitude of R ~ 21.0, as compared to USNO-B1.0 stars.
GCN Circular #19190
K.L. Page (U. Leicester), A. D'Ai (INAF-IASFPA), A. Maselli (INAF-IASFPA), A. Melandri (INAF-OAB), J.A. Kennea (PSU), B. Sbarufatti (INAF-OAB/PSU), D.N. Burrows (PSU), C. Pagani (U. Leicester), A.P. Beardmore (U. Leicester) and V. D'Elia report on behalf of the Swift-XRT team:
We have analysed 7.9 ks of XRT data for GRB 160314A (D'Elia et al. GCN Circ. 19182), from 77 s to 24.8 ks after the BAT trigger. The data comprise 6 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 Osborne et al. (GCN Circ. 19185).
The light curve can be modelled with a power-law decay with a decay index of alpha=1.38 (+/-0.11).
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 2.02 (+0.22, -0.15). The best-fitting absorption column is 6.7 (+5.2, -0.5) x 10^20 cm^-2, consistent with the Galactic value of 6.2 x 10^20 cm^-2 (Willingale et al. 2013). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.2 x 10^-11 (3.8 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     6.7 (+5.2, -0.5) x 10^20 cm^-2
Galactic foreground: 6.2 x 10^20 cm^-2
Excess significance: <1.6 sigma
Photon index:	     2.02 (+0.22, -0.15)
```
If the light curve continues to decay with a power-law decay index of 1.38, the count rate at T+24 hours will be 1.8 x 10^-4 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 6.0 x 10^-15 (7.0 x 10^-15) erg cm^-2 s^-1.
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00679120.
This circular is an official product of the Swift-XRT team.
GCN Circular #19191
D. Malesani (DARK/NBI), A. de Ugarte Postigo (IAA-CSIC and DARK/NBI), T. Kruehler (MPE Garching), A. Kvammen (Univ. Tromsoe, Norway, and NOT), report on behalf of a larger collaboration:
We observed the optical counterpart of GRB 160314A (D'Elia et al., GCN 19182; Siegel & D'Elia, GCN 19187) with the Nordic Optical Telescope (NOT) equipped with the AlFOSC imager. Our observations were carried out in the r and i bands, and started on 2016 March 14.86 (9.07 hr after the GRB).
An object at a position consistent with the UVOT object is detected in both filters. We measure its coordinates to be (J2000; 0.3" uncertainty):
```
RA =  07:31:09.73
Dec = +16:59:58.7
```
At a mean epoch of Mar 14.865 UT, we measure for the afterglow r = 22.40 +- 0.06 (AB), calibrated against nearby SDSS stars. We thus confirm the UVOT object as the afterglow of GRB 160314A.
We note that a faint object is marginally detected at the afterglow position in the SDSS data, visible after stacking the gri images. This could be a relatively bright host galaxy for GRB 160314A. A finding chart is available at the following link:
http://www.astro.ku.dk/~malesani/GRB/160314A/160314A_NOT_SDSS.jpg
GCN Circular #19192
V. D'Elia (INAF-OAR/ASI-ASDC), D. Xu (NAOC/CAS), D. Malesani, J. P. U. Fynbo (DARK/NBI), H. Flores (GEPI/Paris obs), K. Wiersema (U. of Leicester) and D. Watson (DARK/NBI) report on behalf of a larger collaboration:
We observed the afterglow of GRB 160314A (D'Elia et al., GCN 19182) with ESO's Very Large Telescope UT2 equipped with X-shooter.
Our observations started at 00:15:42 UT on 2016 March 15, about 12h 45m after the Swift trigger, and consisted of four spectra of 1200 s each. The X-shooter spectra cover the range between 3000 and 21000 AA, and were obtained at a seeing of around 0.7=EF=BF=BD.
A preliminary analysis of the spectrum shows several emission features at the position of the optical transient (Siegel and D'Elia, GCN 19187; Malesani et al. GCN 19191), which we interpret as emission lines of Halpha, Hbeta, Hgamma, [O III], [O II], [S III] and [N II] from the host galaxy at redshift 0.726. Weak absorption features due to Fe II levels are marginally detected at the same redshift.
We acknowledge the fast and efficient support provided by Paranal staff. In particular we thank Boris Haeussler, Giovanni Carraro, Jose Velasquez, Willem-Jan de Wit and Henri Boffin for their excellent job. We also thank Jens Hoeijmakers for postponing his visitor programme allowing us to perform this observation.
GCN Circular #19195
E. Mazaeva (IKI), A. Volnova (IKI), E. Klunko (ISTP), I. Korobtsev (ISTP), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration:
We observed the field of the GRB 160314A (D'Elia et al., GCN 19182) with AZT-33IK telescope of Sayan observatory (Mondy) starting on March, 14 (UT) 16:13:52. The optical counterpart of GRB 160314A (D'Elia et al., GCN 19182; Siegel & D'Elia, GCN 19187) is clearly visible in a combined image. Preliminary photometry of the combined image is following
```
Date           UT start   t-T0       Filter   Exp.   OT     OT_err
                       (mid, days)               (s)

2016-03-14  16:13:52  0.21784  R       64*60  21.82  0.18

SDSS-DR9_id                R(Lupton)

J073110.30+170129.8    16.13
J073114.43+170052.5    17.95
J073119.52+170015.1    17.13
J073110.88+170047.1    19.53
J073104.14+170112.8    19.88
```
GCN Circular #19196
Nat Butler (ASU), Alan M. Watson (UNAM), Alexander Kutyrev (GSFC), William H. Lee (UNAM), Michael G. Richer (UNAM), Ori Fox (STScI), J. Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (GSFC/STScI), 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), Harvey Moseley (GSFC), John Capone (UMD), V. Zach Golkhou (ASU), and Vicki Toy (UMD) report:
We observed the field of GRB 160314A (D'Elia et al., GCN Circ. 19182) 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 2016/03 15.13 to 2016/03 15.36 UTC (15.59 to 21.16 hours after the BAT trigger), obtaining a total of 3.56 hours exposure in the r and i bands and 1.49 hours exposure in the Z, Y, J, and H bands.
For a source within the Swift-XRT error circle (Osborne et al., GCN Circ. 19185), in comparison with the SDSS DR9 and 2MASS catalogs, we obtain the following detections and 3-sigma upper limit:
```
 r	22.83 +/- 0.10
 i	22.37 +/- 0.06
 Z	22.27 +/- 0.15
 Y	22.40 +/- 0.21
 J	21.93 +/- 0.19
 H	> 22.38
```
These magnitudes are in the AB system and are not corrected for Galactic extinction in the direction of the GRB.
Compared to the NOT observations reported by Malesani et al. (GCN Circ. 19191), we detect fading in r at the 3.7-sigma level between mean epochs of 9.2 and 18.4 hours after the bursts. This confirms that the NOT source is the optical counterpart of the GRB.
We thank the staff of the Observatorio Astron=F3mico Nacional in San Pedro M=E1rtir.
GCN Circular #19199
A. Volnova (IKI), E. Chornaya (UAFO), E. Mazaeva (IKI), A. Matkin (UAFO, ISON), I. Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration:
After receiving full data set of our observations (GCN 19184) we refine photometry and correct UT time of the observations.
The field of the GRB 160314A (D'Elia et al., GCN 19182) was observed with SANTEL-650 (0.65m) telescope of UAFO/ISON-Ussuriysk observatory starting on March, 14 (UT) 11:56:51 under clear sky but with a high ground wind speed. We obtained series of unfiltered images of 30 s exposure. In a combined image we do not detect optical afterglow (D'Elia et al., GCN 19182; Siegel & D'Elia, GCN 19187; Malesani et al., GCN 19191). Photometry of combined images is following
```
Date       UT start  t-T0   Filter  Exp.    OT     U_limit (3sigma)
                      (mid, days)    (s)

2016-03-14 11:56:51  0.01728  none    3*30  n/d    18.7
2016-03-14 11:56:51  0.04575  none   30*30  n/d    20.1
```
The photometry is based on nearby SDSS star J073110.29+170129.9 assuming R_Lupton = 16.132.
GCN Circular #19200
T. Schweyer, J. Bolmer and J. Greiner (all MPE Garching) report on behalf of the GROND team:
We observed the field of GRB 160314A (Swift trigger 679120; D'Elia et al., GCN #19182) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2m MPG telescope at the ESO La Silla Observatory (Chile).
Observations started at 23:53 UT on 2016-03-15, 36.3h after the GRB trigger. They were performed at an average seeing of 1.1" and at an average airmass of 1.5.
We clearly detect the source reported by Malesani et al. (GCN #19191) and Butler et al. (GCN #19196).
Based on 90 min of exposure in g'r'i'z' and 96 min in JHK, at a mid-time of 00:44 UT on 2016-03-16, we derive the following preliminary magnitudes and upper limits (all in the AB system):
```
g' = 23.3 +/- 0.1 mag,
r' = 23.1 +/- 0.1 mag,
i' = 22.6 +/- 0.1 mag,
z' = 22.5 +/- 0.1 mag,
J > 22.2 mag,
H > 21.8 mag, and
K > 20.4 mag.
```
Given detections and upper limits are calibrated against SDSS as well as 2MASS field stars. No correction for the expected Galactic foreground extinction corresponding to a reddening of E_(B-V)=0.07 mag in the direction of the burst (Schlafly & Finkbeiner 2011) has been applied.
Our r'-band magnitude, combined with that of RATIR (Butler et al., GCN #19196) suggests a very slow fading, possibly indicating that we are close to the brightness of the host galaxy (Malesani et al. GCN #19191, D'Elia et al., GCN #19192).
GCN Circular #19202
V. Zach Golkhou (ASU), Nat Butler (ASU), Alan M. Watson (UNAM), Alexander Kutyrev (GSFC), William H. Lee (UNAM), Michael G. Richer (UNAM), Ori Fox (STScI), J. Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (GSFC/STScI), Eleonora Troja (GSFC), Owen Littlejohns (ASU), Enrico Ramirez-Ruiz (UCSC), Jos� A. de Diego (UNAM), Leonid Georgiev (UNAM), Jes�s Gonz�lez (UNAM), Carlos Rom�n-Z��iga (UNAM), Neil Gehrels (GSFC), Harvey Moseley (GSFC), John Capone (UMD), and Vicki Toy (UMD) report:
We observed the field of GRB 160314A (D'Elia et al., GCN 19182) with the Reionization and Transients Infrared Camera (RATIR; www.ratir.org) on the 1.5m Harold Johnson Telescope at the Observatorio Astron�mico Nacional on Sierra San Pedro M�rtir from 2016/03 16.12 to 2016/03 16.35 UTC (39.43 to 44.80 hours after the BAT trigger), obtaining a total of 3.56 hours exposure in the r and i bands and 1.49 hours exposure in the Z, Y, J, and H bands.
For a source within the Swift-XRT error circle (Osborne et al., GCN 19185), in comparison with the SDSS DR9 and 2MASS catalogs, we obtain the following detections and 3-sigma upper limit:
```
r      23.48 +/- 0.26
i      22.84 +/- 0.16
Z     22.08 +/- 0.17
Y     22.32 +/- 0.22
J      >  22.45
H     21.87 +/- 0.25
 
```
These magnitudes are in the AB system and are not corrected for Galactic extinction in the direction of the GRB. Our observations (see, also, Butler et al., GCN 19196) are consistent with a continued, slow source fading as reported by the GROND team (Schweyer et al, GCN 19200).
We thank the staff of the Observatorio Astron�mico Nacional in San Pedro M�rtir.
GCN Circular #19203
V. Zach Golkhou (ASU), Nat Butler (ASU), Alan M. Watson (UNAM), Alexander Kutyrev (GSFC), William H. Lee (UNAM), Michael G. Richer (UNAM), Ori Fox (STScI), J. Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (GSFC/STScI), 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), Harvey Moseley (GSFC), John Capone (UMD), and Vicki Toy (UMD) report:
We observed the field of GRB 160314A (D'Elia et al., GCN 19182) 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 2016/03 16.12 to 2016/03 16.35 UTC (39.43 to 44.80 hours after the BAT trigger), obtaining a total of 3.56 hours exposure in the r and i bands and 1.49 hours exposure in the Z, Y, J, and H bands.
For a source within the Swift-XRT error circle (Osborne et al., GCN 19185), in comparison with the SDSS DR9 and 2MASS catalogs, we obtain the following detections and 3-sigma upper limit:
```
r      23.48 +/- 0.26
i      22.84 +/- 0.16
Z     22.08 +/- 0.17
Y     22.32 +/- 0.22
J      >  22.45
H     21.87 +/- 0.25
```
These magnitudes are in the AB system and are not corrected for Galactic extinction in the direction of the GRB. Our observations (see, also, Butler et al., GCN 19196) are consistent with a continued, slow source fading as reported by the GROND team (Schweyer et al, GCN 19200).
We thank the staff of the Observatorio Astron=F3mico Nacional in San Pedro M=E1rtir.
GCN Circular #19451
K. P. Mooley, T. D. Staley, R. P. Fender (Oxford), G. E. Anderson (Curtin), C. Rumsey, D. Titterington, S. Carey, J. Hickish, Y. C. Perrott, N. Razavi-Ghods, P. Scott (Cambridge), K. Grainge, A. Scaife (Manchester)
The AMI Large Array robotically triggered on the Swift alert for GRB 160314A (D'Elia et al., GCN 19182) as part of the 4pisky program, and subsequent follow up observations were obtained up to 10 days post-burst. Our observations at 15 GHz on 2016 Mar 14.65, Mar 15.81, Mar 17.73, Mar 21.82, and Mar 24.91 (UT) do not reveal any radio source at the XRT location (Osborne et al., GCN 19185), with 3sigma upper limits of 280 uJy, 100 uJy, 270 uJy, 100 uJy, and 320 uJy respectively.
We thank the AMI staff for scheduling these observations. The AMI-GRB database is a log of all GRB follow up observations with the AMI, and is available at http://4pisky.org/ami-grb/.

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Jochen Greiner, last update: 23-May-2016 [Disclaimer]