Gamma-ray Burst 160703A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 03 Jul 16 12:10:22 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     702699,   Seg_Num: 0
GRB_RA:          287.392d {+19h 09m 34s} (J2000),
                 287.538d {+19h 10m 09s} (current),
                 286.951d {+19h 07m 48s} (1950)
GRB_DEC:         +36.901d {+36d 54' 04"} (J2000),
                 +36.929d {+36d 55' 43"} (current),
                 +36.819d {+36d 49' 08"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       5716 [cnts]    Image_Peak=390 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   155     E_range: 50-350 keV
BKG_INTEN:       22549 [cnts]
BKG_TIME:        43791.49 SOD {12:09:51.49} UT
BKG_DUR:         8 [sec]
GRB_DATE:        17572 TJD;   185 DOY;   16/07/03
GRB_TIME:        43805.12 SOD {12:10:05.12} UT
GRB_PHI:         153.98 [deg]
GRB_THETA:        22.06 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     49.32 [sigma]
IMAGE_SIGNIF:    12.80 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +3  +2  +0  +0 +50  +0 
SUN_POSTN:       103.03d {+06h 52m 08s}  +22.90d {+22d 53' 45"}
SUN_DIST:        120.02 [deg]   Sun_angle= 11.7 [hr] (West of Sun)
MOON_POSTN:       89.19d {+05h 56m 45s}  +18.59d {+18d 35' 06"}
MOON_DIST:       121.85 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:       68.17, 12.56 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      297.39, 58.70 [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 = 179.16,-16.58 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:          GCN/INTEGRAL NOTICE
NOTICE_DATE:    Sun 03 Jul 16 12:11:24 UT
NOTICE_TYPE:    INTEGRAL SPI ACS Trigger 
TRIGGER_NUM:    7503,   Sub_Num: 0
GRB_INTEN:      9.21 [sigma]
GRB_TIME:       43800.72 SOD {12:10:00.72} UT
GRB_DATE:       17572 TJD;   185 DOY;   16/07/03
COMMENTS:       INTEGRAL SPI_ACS GRB Trigger.
COMMENTS:       Time_Scale=2.0000 and Time_Error=1.0000.
COMMENTS:       
COMMENTS:       NOTE: This SPIACS event is temporally(5.0<100sec) coincident with the SWIFT_BAT event (trignum=702699).
COMMENTS:
COMMENTS:       The SPIACS lightcurve can be found at:
COMMENTS:       ftp://isdcarc.unige.ch/arc/FTP/ibas/spiacs/2016-07/2016-07-03T12-10-00.5633-01888-64400-0.lc

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 03 Jul 16 12:13:35 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     702699,   Seg_Num: 0
GRB_RA:          287.392d {+19h 09m 34s} (J2000),
                 287.538d {+19h 10m 09s} (current),
                 286.951d {+19h 07m 48s} (1950)
GRB_DEC:         +36.901d {+36d 54' 04"} (J2000),
                 +36.929d {+36d 55' 43"} (current),
                 +36.819d {+36d 49' 08"} (1950)
GRB_DATE:        17572 TJD;   185 DOY;   16/07/03
GRB_TIME:        43805.12 SOD {12:10:05.12} UT
TRIGGER_INDEX:   155
GRB_PHI:         153.98 [deg]
GRB_THETA:        22.06 [deg]
DELTA_TIME:      77.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     49.32 [sigma]
IMAGE_SIGNIF:    12.80 [sigma]
LC_URL:          sw00702699000msb.lc
SUN_POSTN:       103.03d {+06h 52m 08s}  +22.90d {+22d 53' 44"}
SUN_DIST:        120.03 [deg]   Sun_angle= 11.7 [hr] (West of Sun)
MOON_POSTN:       89.22d {+05h 56m 54s}  +18.59d {+18d 35' 10"}
MOON_DIST:       121.86 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:       68.17, 12.56 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      297.39, 58.70 [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 = 179.16,-16.58 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 03 Jul 16 12:14:16 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     702699,   Seg_Num: 0
POINT_RA:        287.394d {+19h 09m 35s} (J2000)
POINT_DEC:       +36.910d {+36d 54' 35"} (J2000)
POINT_ROLL:      4.641d
IMG_START_DATE:  17572 TJD;   185 DOY;   16/07/03
IMG_START_TIME:  43881.02 SOD {12:11:21.02} UT,   75.9 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.726
N_STARS:         190
X_OFFSET:        402 [pixels]
Y_OFFSET:        579 [pixels]
X_MAX:           1361 [pixels]
Y_MAX:           1538 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00702699000msufc0075.fits
SUN_POSTN:       103.03d {+06h 52m 08s}  +22.90d {+22d 53' 44"}
SUN_DIST:        120.02 [deg]   Sun_angle= 11.7 [hr] (West of Sun)
MOON_POSTN:       89.23d {+05h 56m 55s}  +18.59d {+18d 35' 10"}
MOON_DIST:       121.85 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:       68.18, 12.57 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      297.40, 58.71 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 03 Jul 16 12:14:43 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     702699,   Seg_Num: 0
POINT_RA:        287.394d {+19h 09m 35s} (J2000)
POINT_DEC:       +36.910d {+36d 54' 35"} (J2000)
POINT_ROLL:      4.641d
IMG_START_DATE:  17572 TJD;   185 DOY;   16/07/03
IMG_START_TIME:  43881.02 SOD {12:11:21.02} UT,   75.9 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.726
N_STARS:         190
X_OFFSET:        402 [pixels]
Y_OFFSET:        579 [pixels]
X_MAX:           1361 [pixels]
Y_MAX:           1538 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00702699000msufc0075.fits
SUN_POSTN:       103.04d {+06h 52m 08s}  +22.90d {+22d 53' 44"}
SUN_DIST:        120.02 [deg]   Sun_angle= 11.7 [hr] (West of Sun)
MOON_POSTN:       89.23d {+05h 56m 56s}  +18.59d {+18d 35' 11"}
MOON_DIST:       121.85 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:       68.18, 12.57 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      297.40, 58.71 [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:     Sun 03 Jul 16 12:15:39 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     702699,   Seg_Num: 0
POINT_RA:        287.394d {+19h 09m 35s} (J2000)
POINT_DEC:       +36.910d {+36d 54' 35"} (J2000)
ROLL:            4.641d
IMG_START_DATE:  17572 TJD;   185 DOY;   16/07/03
IMG_START_TIME:  43881.02 SOD {12:11:21.02} UT,   75.9 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     489240697
X_OFFSET:        721 [pixels]
Y_OFFSET:        898 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       881
Y_GRB_POS:       1058
BINNING_INDEX:   1
IM_URL:          sw00702699000msuni0092.fits
SUN_POSTN:       103.04d {+06h 52m 09s}  +22.90d {+22d 53' 44"}
SUN_DIST:        120.02 [deg]   Sun_angle= 11.7 [hr] (West of Sun)
MOON_POSTN:       89.24d {+05h 56m 59s}  +18.59d {+18d 35' 12"}
MOON_DIST:       121.85 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:       68.18, 12.57 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      297.40, 58.71 [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:     Sun 03 Jul 16 12:16:03 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     702699,   Seg_Num: 0
POINT_RA:        287.394d {+19h 09m 35s} (J2000)
POINT_DEC:       +36.910d {+36d 54' 35"} (J2000)
ROLL:            4.641d
IMG_START_DATE:  17572 TJD;   185 DOY;   16/07/03
IMG_START_TIME:  43881.02 SOD {12:11:21.02} UT,   75.9 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     489240697
X_OFFSET:        721 [pixels]
Y_OFFSET:        898 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       881
Y_GRB_POS:       1058
BINNING_INDEX:   1
IM_URL:          sw00702699000msuni0092.fits
SUN_POSTN:       103.04d {+06h 52m 09s}  +22.90d {+22d 53' 44"}
SUN_DIST:        120.02 [deg]   Sun_angle= 11.7 [hr] (West of Sun)
MOON_POSTN:       89.25d {+05h 57m 00s}  +18.59d {+18d 35' 12"}
MOON_DIST:       121.86 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:       68.18, 12.57 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      297.40, 58.71 [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:     Sun 03 Jul 16 12:20:45 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     702699,   Seg_Num: 0
POINT_RA:        287.397d {+19h 09m 35s} (J2000)
POINT_DEC:       +36.911d {+36d 54' 40"} (J2000)
POINT_ROLL:      4.642d
IMG_START_DATE:  17572 TJD;   185 DOY;   16/07/03
IMG_START_TIME:  44093.28 SOD {12:14:53.28} UT,   288.2 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.572
N_STARS:         190
X_OFFSET:        162 [pixels]
Y_OFFSET:        339 [pixels]
X_MAX:           1601 [pixels]
Y_MAX:           1778 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00702699000msufc0288.fits
SUN_POSTN:       103.04d {+06h 52m 09s}  +22.90d {+22d 53' 43"}
SUN_DIST:        120.02 [deg]   Sun_angle= 11.7 [hr] (West of Sun)
MOON_POSTN:       89.30d {+05h 57m 12s}  +18.59d {+18d 35' 17"}
MOON_DIST:       121.87 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:       68.18, 12.57 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      297.40, 58.71 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 03 Jul 16 12:21:13 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     702699,   Seg_Num: 0
POINT_RA:        287.397d {+19h 09m 35s} (J2000)
POINT_DEC:       +36.911d {+36d 54' 40"} (J2000)
POINT_ROLL:      4.642d
IMG_START_DATE:  17572 TJD;   185 DOY;   16/07/03
IMG_START_TIME:  44093.28 SOD {12:14:53.28} UT,   288.2 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.572
N_STARS:         190
X_OFFSET:        162 [pixels]
Y_OFFSET:        339 [pixels]
X_MAX:           1601 [pixels]
Y_MAX:           1778 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00702699000msufc0288.fits
SUN_POSTN:       103.04d {+06h 52m 10s}  +22.90d {+22d 53' 42"}
SUN_DIST:        120.02 [deg]   Sun_angle= 11.7 [hr] (West of Sun)
MOON_POSTN:       89.30d {+05h 57m 13s}  +18.59d {+18d 35' 18"}
MOON_DIST:       121.87 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:       68.18, 12.57 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      297.40, 58.71 [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:     Sun 03 Jul 16 12:21:53 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     702699,   Seg_Num: 0
POINT_RA:        287.397d {+19h 09m 35s} (J2000)
POINT_DEC:       +36.911d {+36d 54' 40"} (J2000)
ROLL:            4.642d
IMG_START_DATE:  17572 TJD;   185 DOY;   16/07/03
IMG_START_TIME:  44093.28 SOD {12:14:53.28} UT,   288.2 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     489240909
X_OFFSET:        721 [pixels]
Y_OFFSET:        898 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       881
Y_GRB_POS:       1058
BINNING_INDEX:   1
IM_URL:          sw00702699000msuni0305.fits
SUN_POSTN:       103.04d {+06h 52m 10s}  +22.90d {+22d 53' 42"}
SUN_DIST:        120.02 [deg]   Sun_angle= 11.7 [hr] (West of Sun)
MOON_POSTN:       89.31d {+05h 57m 14s}  +18.59d {+18d 35' 18"}
MOON_DIST:       121.87 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:       68.18, 12.57 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      297.40, 58.71 [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:     Sun 03 Jul 16 12:22:10 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     702699,   Seg_Num: 0
POINT_RA:        287.397d {+19h 09m 35s} (J2000)
POINT_DEC:       +36.911d {+36d 54' 40"} (J2000)
ROLL:            4.642d
IMG_START_DATE:  17572 TJD;   185 DOY;   16/07/03
IMG_START_TIME:  44093.28 SOD {12:14:53.28} UT,   288.2 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     489240909
X_OFFSET:        721 [pixels]
Y_OFFSET:        898 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       881
Y_GRB_POS:       1058
BINNING_INDEX:   1
IM_URL:          sw00702699000msuni0305.fits
SUN_POSTN:       103.04d {+06h 52m 10s}  +22.90d {+22d 53' 42"}
SUN_DIST:        120.02 [deg]   Sun_angle= 11.7 [hr] (West of Sun)
MOON_POSTN:       89.31d {+05h 57m 15s}  +18.59d {+18d 35' 19"}
MOON_DIST:       121.87 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:       68.18, 12.57 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      297.40, 58.71 [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 #19645
S. B. Cenko (GSFC), V. D'Elia (ASDC), N. Gehrels (NASA/GSFC), L. Izzo (IAA-CSIC), J. A. Kennea (PSU), F. E. Marshall (NASA/GSFC), K. L. Page (U Leicester), D. M. Palmer (LANL), T. Sakamoto (AGU), B. Sbarufatti (INAF-OAB/PSU) and T. N. Ukwatta (LANL) report on behalf of the Swift Team:
At 12:10:05 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 160703A (trigger=702699). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 287.392, +36.901 which is
```
   RA(J2000) = 19h 09m 34s
   Dec(J2000) = +36d 54' 04"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a complex structure with a duration of about 60 sec. The peak count rate was ~10000 counts/sec (15-350 keV), at ~22 sec after the trigger.
XRT is temporarily offline, and so there will be no immediate data from this GRB.
UVOT took a finding chart exposure of 150 seconds with the White filter starting 75 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 25% of the BAT 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 BAT 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 0.14.
Burst Advocate for this burst is S. B. Cenko (brad.cenko 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:     Sun 03 Jul 16 12:27:28 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     702699,   Seg_Num: 0
POINT_RA:        287.396d {+19h 09m 35s} (J2000)
POINT_DEC:       +36.911d {+36d 54' 41"} (J2000)
POINT_ROLL:      4.641d
IMG_START_DATE:  17572 TJD;   185 DOY;   16/07/03
IMG_START_TIME:  44669.96 SOD {12:24:29.96} UT,   864.8 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.828
N_STARS:         190
X_OFFSET:        162 [pixels]
Y_OFFSET:        339 [pixels]
X_MAX:           1601 [pixels]
Y_MAX:           1778 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    6
SL_URL:          sw00702699000msufc0864.fits
SUN_POSTN:       103.04d {+06h 52m 11s}  +22.89d {+22d 53' 41"}
SUN_DIST:        120.02 [deg]   Sun_angle= 11.7 [hr] (West of Sun)
MOON_POSTN:       89.37d {+05h 57m 29s}  +18.59d {+18d 35' 24"}
MOON_DIST:       121.88 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:       68.18, 12.57 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      297.40, 58.71 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 03 Jul 16 12:27:54 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     702699,   Seg_Num: 0
POINT_RA:        287.396d {+19h 09m 35s} (J2000)
POINT_DEC:       +36.911d {+36d 54' 41"} (J2000)
POINT_ROLL:      4.641d
IMG_START_DATE:  17572 TJD;   185 DOY;   16/07/03
IMG_START_TIME:  44669.96 SOD {12:24:29.96} UT,   864.8 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.828
N_STARS:         190
X_OFFSET:        162 [pixels]
Y_OFFSET:        339 [pixels]
X_MAX:           1601 [pixels]
Y_MAX:           1778 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    6
SL_URL:          sw00702699000msufc0864.fits
SUN_POSTN:       103.04d {+06h 52m 11s}  +22.89d {+22d 53' 41"}
SUN_DIST:        120.02 [deg]   Sun_angle= 11.7 [hr] (West of Sun)
MOON_POSTN:       89.37d {+05h 57m 30s}  +18.59d {+18d 35' 24"}
MOON_DIST:       121.88 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:       68.18, 12.57 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      297.40, 58.71 [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:     Sun 03 Jul 16 12:28:52 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     702699,   Seg_Num: 0
POINT_RA:        287.396d {+19h 09m 35s} (J2000)
POINT_DEC:       +36.911d {+36d 54' 41"} (J2000)
ROLL:            4.641d
IMG_START_DATE:  17572 TJD;   185 DOY;   16/07/03
IMG_START_TIME:  44669.96 SOD {12:24:29.96} UT,   864.8 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     489241486
X_OFFSET:        721 [pixels]
Y_OFFSET:        898 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       881
Y_GRB_POS:       1058
BINNING_INDEX:   1
IM_URL:          sw00702699000msuni0881.fits
SUN_POSTN:       103.05d {+06h 52m 11s}  +22.89d {+22d 53' 41"}
SUN_DIST:        120.02 [deg]   Sun_angle= 11.7 [hr] (West of Sun)
MOON_POSTN:       89.38d {+05h 57m 32s}  +18.59d {+18d 35' 25"}
MOON_DIST:       121.89 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:       68.18, 12.57 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      297.40, 58.71 [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:     Sun 03 Jul 16 12:29:12 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     702699,   Seg_Num: 0
POINT_RA:        287.396d {+19h 09m 35s} (J2000)
POINT_DEC:       +36.911d {+36d 54' 41"} (J2000)
ROLL:            4.641d
IMG_START_DATE:  17572 TJD;   185 DOY;   16/07/03
IMG_START_TIME:  44669.96 SOD {12:24:29.96} UT,   864.8 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     489241486
X_OFFSET:        721 [pixels]
Y_OFFSET:        898 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       881
Y_GRB_POS:       1058
BINNING_INDEX:   1
IM_URL:          sw00702699000msuni0881.fits
SUN_POSTN:       103.05d {+06h 52m 11s}  +22.89d {+22d 53' 41"}
SUN_DIST:        120.02 [deg]   Sun_angle= 11.7 [hr] (West of Sun)
MOON_POSTN:       89.39d {+05h 57m 33s}  +18.59d {+18d 35' 26"}
MOON_DIST:       121.89 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:       68.18, 12.57 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      297.40, 58.71 [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 #19647
Klotz A., Turpin D., Atteia J.L. (CNRS-OMP-IRAP), Boer, M., Laugier, R. (CNRS-ARTEMIS), Gendre B. (UVI - Etelman Obs.), Coward, D. McPherson, D. Williams A., Martin R., Moore J., Dodson R. (UWA) report:
We imaged the field of GRB 160703A detected by SWIFT (trigger 702699) with the Zadko robotic telescope (D=100cm) located at the observatory - Gingin, Australia.
The observations started 5.5h after the GRB trigger. The elevation of the field decreased from only 20 degrees above horizon and weather conditions were good.
We co-added a series of exposures. No credible source was found in the BAT error box: t0+5.5h to t0+5.6h : Rlim = 19.4
Magnitudes were estimated with the nearby USNO-B1 stars and are not corrected for galactic dust extinction.
GCN Circular #19648
A. Y. Lien (GSFC/UMBC), S. D. Barthelmy (GSFC), S. B. Cenko (GSFC), J. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), 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+963 sec from the recent telemetry downlinks, we report further analysis of BAT GRB 160703A (trigger #702699) (Cenko, et al., GCN Circ. 19645). The BAT ground-calculated position is RA, Dec = 287.414, 36.913 deg, which is
```
   RA(J2000)  =  19h 09m 39.4s 
   Dec(J2000) = +36d 54' 46.2" 
```
with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 84%.
The mask-weighted light curve shows many overlapping peaks starting at ~T-26 sec, with the brightest peak at ~T+28 sec, and ending at ~T+75 sec. T90 (15-350 keV) is 44.4 +- 2.8 sec (estimated error including systematics).
The time-averaged spectrum from T-26.43 to T+52.57 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.34 +- 0.04. The fluence in the 15-150 keV band is 9.0 +- 0.2 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+26.64 sec in the 15-150 keV band is 5.8 +- 0.3 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/702699/BA/
GCN Circular #19649
D. Frederiks, S. Golenetskii, R.Aptekar, P. Oleynik, M. Ulanov, D. Svinkin, A. Tsvetkova, A.Lysenko, A. Kozlova, and T. Cline, on behalf of the Konus-Wind team, report:
The long GRB 160703A (Swift/BAT observation: Cenko et al., GCN 19645; Lien et al., GCN 19648) triggered Konus-Wind at T0=3D43807.015 s UT (12:10:07.015).
The light curve shows multiple overlapping pulses, a total duration of the burst is ~50 s. The emission is seen up to ~4 MeV.
As observed by Konus-Wind, the burst had a fluence of (2.7 =B1 0.2)x10^-5 erg/cm2 and a 64-ms peak energy flux, measured from T0+23.360, of (2.8 =B1 0.3)x10^-6 erg/cm2 (both in the 20 keV - 10 MeV energy range).
The time-integrated spectrum (measured from T0 to T0+41.216 s) is best fit in the 20 keV - 10 MeV range by a cutoff power-law (CPL) function with the following model parameters: the photon index alpha =3D -1.01(-0.09,+0.10), and the peak energy Ep =3D 327(-36,+46) keV, chi2 =3D 93/97 dof. Fitting this spectrum with the GRB (Band) function yields the same alpha and Ep with only an upper limit on beta of -2.4, chi2 =3D 93/96 dof.
The spectrum near the peak count rate (measured from T0 to T0+41.216 s) is best fit in the 20 keV - 10 MeV range by a cutoff power-law (CPL) function with the following model parameters: the photon index alpha =3D -0.66(-0.15,+0.16), and the peak energy Ep =3D 272(-29,+35) keV, chi2 =3D 79/89 dof. Fitting this spectrum with the GRB (Band) function yields the same alpha and Ep with only an upper limit on beta of -3.1, chi2 =3D 79/88 dof.
The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB160703_T43807/
All the quoted errors are estimated at the 90% confidence level. All the presented results are preliminary.
GCN Circular #19650
U.Quadri, L.Strabla and R.Girelli report:
We imaged the field of GRB 160703A detected by SWIFT(trigger 702699) with the robotic telescope of (IAU station 565) Bassano Bresciano Observatory, Italy. Member of: AAVSO - American Association of Variable Star Observers. ISSP - Italian Supernovae Search Project. UAI/SSV - Unione Astrofili Italiani/sezione stelle variabili.
The observations started 8.31 hour after the GRB trigger, with our Schmidt telescope D=320/400 mm F/D=3.1.
Weather conditions were good.
We co-added a series of exposures of 120 sec each.
```
Start T0+      End T0+      Vlim
8.31 hour    10.28 hour      19
```
We did not found any optical counterpart in the error box of the XRTcandidate. (S. B. Cenko (GSFC), V. D'Elia (ASDC), N. Gehrels (NASA/GSFC), et al.)
Magnitudes were estimated with the UCAC4 cat. and are not corrected for galactic dust extinction.
Reference: http://www.osservatoriobassano.org/GRB.asp
The message may be cited.
GCN Circular #19652
Y. Tachibana, Y. Saito, Y. Muraki, Y. Ono, T. Fujiwara, T. Yoshii, K. Sais= ho, H. Ohuchi, Y. Yano, S. Harita, Y. Yatsu, and N. Kawai (Tokyo Tech) report on behalf of the MITSuME collaboration:
We report the optical follow-up observations of GRB 160703A (S. B. Cenko et= al., GCN Circular #19645) with a tricolor camera (g', Rc, and Ic) attached= to the MITSuME 50 cm telescope of Akeno Observatory, Yamanashi, Japan.
The observation started at 2016-07-03 12:10:54 UT (~30 sec after the burst). Although the first eight frames (each exposure time is 30 sec) are covered = by thick clouds, we detected a bright optical transient source in the refin= ed BAT error circle (A. Y. Lien et al., GCN Circular #19648) ~5 min after = the trigger. The position of the counterpart is
```
RA(J2000) =3D 19h 09m 40.1s
Dec(J2000) =3D +36d 55' 08.1"
```
with an uncertainty of ~0.5 arc sec.
Nearby the optical transient, a known source N2JN062852 (RA, Dec =3D 19h 09m 40.212s, +36d 55' 06.9816=1B$B!I=1B(B) catalogued in GSC2.3 is located. In the photometric analysis, we ignored the contamination from the nearby source because its=20 flux is substantially lower (Fmag =3D 20.27) comparing with the optical counterpart. The results were shown below:
```
  T0+[min]    MID-UT    T-EXP[sec]    g=1B$B!G=1B(B    g=1B$B!G=1B(B_err    Rc    Rc_err    Ic    Ic_err
----------------------------------------------------------------------------------------------------------------------
   5.82          12:15:54        30          15.46    0.06        14.59    0.06        14.25    0.09
   58.35        13:08:26      3900        18.18    0.05        17.08    0.04        16.87    0.06
   330.52      15:40:36      7680        19.13    0.06        17.96    0.05        17.61    0.06
----------------------------------------------------------------------------------------------------------------------
  T0+ : Elapsed time after the burst
  T-EXP: Total Exposure time
```
We used GSC2.3 catalog for flux calibration. Further analysis is ongoing.
GCN Circular #19653
D. Kuroda (OAO, NAOJ), H. Hanayama, T. Miyaji, J. Watanabe (IAO, NAOJ), K. Yanagisawa (OAO, NAOJ), S.Nagayama (NAOJ), M. Yoshida (Hiroshima), K. Ohta (Kyoto) and N. Kawai(Tokyo Tech) report on behalf of the MITSuME and OISTER collaboration:
We observed the field of GRB 160703A (Cenko et al., GCNC 19645) with the optical three color (g', Rc and Ic) CCD camera attached to the Murikabushi 1m telescope of Ishigakijima Astronomical Observatory.
The observation started on 2016-07-03 12:12:55 UT, (~2.8 min after the burst). We detected the previously reported afterglow (Tachibana et al., GCNC 19652) in in all the three bands.
The photometric results of the OT are listed below. We used GSC2.3 catalog for flux calibration.
```
#T0+[day]  MID-UT    T-EXP[sec] g'    g'_e  Rc    Rc_e  Ic    Ic_e
-------------------------------------------------------------------
0.00232    12:13:25      60.0   14.02 0.02  13.73 0.02  13.35 0.01
0.13017    15:17:31     540.0   19.32 0.07  18.37 0.04  18.22 0.08
-------------------------------------------------------------------
T0+ : Elapsed time after the burst [day]
T-EXP: Total Exposure time [sec]
```
GCN Circular #19655
V. D'Elia (INAF-OAR), L. Izzo (IAA-CSIC), D. Malesani (DARK/NBI), E. Troja (GSFC), B. Sbarufatti (INAF-OAB/PSU), D.N. Burrows (PSU), T.G.R. Roegiers (PSU), B. Mingo (U. Leicester), A.P. Beardmore (U. Leicester), A. Maselli (INAF-IASFPA), A. Melandri (INAF-OAB), P. D'Avanzo (INAF-OAB) and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team:
Swift-XRT has performed follow-up observations of the Swift/BAT-detected burst GRB 160703A (Lien et al. GCN Circ. 19648), collecting 5.0 ks of Photon Counting (PC) mode data between T0+107.8 ks and T0+120.4 ks.
An uncatalogued X-ray source is detected within the 3-sigma Swift/BAT error region and is above the RASS limit, and is therefore likely the GRB afterglow. The position of this source is RA, Dec=287.4168, +36.9175 which is equivalent to:
```
RA (J2000): 19:09:40.04
Dec(J2000): +36:55:03.0
```
with an uncertainty of 3.9 arcsec (radius, 90% confidence). This position is 92 arcsec from the Swift/BAT position and 5.1 arcsec from the optical transient reported by Tachibana et al. (GCN Circ. 19652). The light curve is consistent with a constant source of mean count rate 1.7e-02 ct/sec. A power-law fit gives an index of 2.92 (+0.03, -3.89).
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 1.9 (+0.7, -0.5). The best-fitting absorption column is 3.0 (+3.9, -1.5) x 10^21 cm^-2, consistent with the Galactic value of 1.5 x 10^21 cm^-2 (Willingale et al. 2013). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.9 x 10^-11 (5.4 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     3.0 (+3.9, -1.5) x 10^21 cm^-2
Galactic foreground: 1.5 x 10^21 cm^-2
Excess significance: <1.6 sigma
Photon index:	     1.9 (+0.7, -0.5)
```
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00702699. The results of the full analysis of the XRT observations are available at http://www.swift.ac.uk/ToO_GRBs/00702699.
This circular is an official product of the Swift-XRT team.

GCN Circular #19656
L. M. Z. Hagen (PSU) and S. B. Cenko (GSFC) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 160703A 75 s after the BAT trigger (Cenko et al., GCN Circ. 19645). We detect a fading source consistent with the XRT position (D'Elia et al. GCN Circ. 19655) and optical detections (Tachibana et al., GCN Circ. 19652; Kuroda et al., GCN Circ. 19653).
Preliminary detections 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

white               75          225          147         14.09+-0.02
white              567         1014          186         16.64+-0.03
white             4890         5090          196         18.33+-0.05
v                  617         1064           58         16.51+-0.10
v                 5300         5500          196         18.34+-0.17
b                  543          735           38         16.38+-0.06
b                 4685         4885          196         18.76+-0.11
u                  288          537          245         15.05+-0.03
u                  691          710           19         15.88+-0.09
u                 4480         4680          196         17.79+-0.08
uvw1               666         1113           58         16.80+-0.12
uvm2               642         1089           58         17.75+-0.25
uvm2              5505         5695          187         19.07+-0.29
uvw2               593         1040           58         18.38+-0.27
uvw2              5096         5295          196         19.45+-0.30

The detection in all UVOT filters is consistent with a redshift of z < ~1.5.
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.15 in the direction of the burst (Schlegel et al. 1998).

GCN Circular #19668
WeiKang Zheng, Alexei V. Filippenko (UC Berkeley), and Melissa Graham (University of Washington) report on behalf of the KAIT GRB team:
We observed the field of GRB 160703A (Cenko et al., GCN 19645) with the 10 m Keck-I telescope on July 3 starting at 13:17:55 UT, or 1.125 hours after the burst. A 180 s g'-band image and a 150 s R-band image were taken simultaneously with LRIS. We detect the optical afterglow (Tachibana et al., GCN 19652; Kuroda et al., GCN 19653; Hagen & Cenko, GCN 19656) in both the g' and R images.
The afterglow is well separated in our images from the nearby source N2JN062852 noted by Tachibana et al. (GCN 19652). We measure the afterglow to be 1.58" west and 1.30" north of N2JN062852. A finding chart is posted at website URL http://w.astro.berkeley.edu/~zwk/grb/GRB160703A/GRB160703A_keck_lris_g_fc.png .
We find that the afterglow had a brightness of R=17.9 mag at 1.125 hours after the burst, calibrated with the USNO B1.0 R2 system.
GCN Circular #19725
A.M.Amelushkin, V.O.Barinova, A.V.Bogomolov, V.V.Bogomolov, A.F.Iyudin, V.V.Kalegaev, M.I.Panasyuk, V.L. Petrov, S.I.Svertilov, I.V.Yashin Lomonosov Moscow State University, Physics Department, Skobeltsyn Institute of Nuclear Physics, Moscow, Russia
E.S. Gorbovskoy, V.G.Kornilov, V.M. Lipunov Lomonosov Moscow State University, Physics Department, Sternberg Astronomical Institute of M.V. Lomonosov Moscow, Moscow, Russia
I. Park, J. Lee, S. Jeong Department of Physics, Sungkyunkwan University, Seobu-ro, Jangangu, Suwonsi, Korea
Russian space mission "Lomonosov" (*) ( http://lomonosov.sinp.msu.ru/en/ ) was launched 28.04.2016 from new Russian Kosmodrom "Vostochny" to polar solar-synchronous orbit with altitude ~490 km. Scientific program of "Lomonosov" includes a multi-wavelength GRB study at different time scales. In particular the complex study of prompt emission will be provided based on the direct recording of readings of wide field optical cameras as well as on the fast pointing of optical and UV telescope using its moving mirror. The spacecraft "Lomonosov" contains 3 instruments for GRB study: gamma-ray burst monitor BDRG ( http://lomonosov.sinp.msu.ru/en/scientific-equipment-2/bdrg ), a wide field optical camera SHOK ( http://lomonosov.sinp.msu.ru/en/scientific-equipment-2/shok ) and UFFO ( http://lomonosov.sinp.msu.ru/en/scientific-equipment-2/uffo ) instrument consisting of coding mask X-ray telescope UBAT and UV slewing mirror telescope SMT.
The Lomonosov GRB monitor BDRG is designed to obtain temporal and spectral information about GRBs in energy range 10-3000 keV as well as to produce GRB trigger.
The trigger is used onboard to fix some amount of data before GRB stored in the internal memory of all instruments of GRB complex as well as to start the detailed data collection. Immediately after the trigger the onboard estimation of the GRB position starts. Then the telegram with trigger information is sent via Global Star transmitter to the server in MSU and, after automatic ground-based data processing (to exclude radiation belt zones etc.) to GCN (this will be realized sometime later after optimizing the trigger parameters during flight tests).
There are 3 GRBs and 5 SGR outbursts are detected to the present BDRG GRB monitor, which were also detected by other space missions and presented in GCN:
GRB 160703 12:10:02 UTC
GRB 160705 17:40:19 UTC
GRB 160720 18:27:55 UTC
Bursts from SGR1935+2154
```
18.06.2016 20:27:24 UTC,
20.06.2016 15:16:34 UTC, 
23.06.2016 21:20:45 UTC,
23.06.2016 21:23:35 UTC,
26.06.2016 13:54:29 UTC
```
Press release is available at http://lomonosov.sinp.msu.ru/wp-content/uploads/GRB_by_BDRG_engl_pdf.pdf
The message may be cited.
(*) About M.V.Lomonosov https://en.wikipedia.org/wiki/Mikhail_Lomonosov
GCN Circular #19737
K. P. Mooley, T. D. Staley, R. P. Fender (Oxford), G. E. Anderson (Curtin), T. Cantwell (Manchester), C. Rumsey, D. Titterington, S. H. 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 160703A (Cenko et al., GCN 19645) as part of the 4pisky program, and subsequent follow up observations were obtained up to 10 days post-burst. While the first observation on 2016 Jul 03.83 was severely affected by RFI, our observations at 15 GHz on 2016 Jul 04.99, Jul 07.00, and Jul 11.00 (UT) do not reveal any radio source at the XRT location (D'Elia et al., GCN 19655), with 3sigma upper limits of 150 uJy, 210 uJy, and 120 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/.
GCN Circular #19739
V. Bhalerao (IUCAA), V. Kumar (IUCAA), D. Bhattacharya (IUCAA), A. R. Rao (TIFR), S. Vadawale (PRL) report on behalf of the Astrosat CZTI collaboration:
Analysis of Astrosat data showed the CZTI detection of a long duration GRB 160703A (Swift/BAT observation:Cenko et al., GCN 19645, Swift/BAT triggered at 12:10:05 UT).
The GRB occured at an angle of 134 degrees away from the CZTI pointing direction. The source was clearly detected in the 40-200 keV energy range. The light curve shows a complex structure, with a peak at UT 12:10:27.000. The peak count rate was 360.40 counts/sec above the background (four quadrants summed together), with a total of 5022.0 counts. The local mean background count rate was 352.0 counts/sec. Using cumulative rates, we measure a T90 of 45.0 secs.
CZTI GRB detections are reported regularly on the payload site at http://astrosat.iucaa.in/czti/?q=grb . CZTI is built by a TIFR-led consortium of institutes across India, including VSSC, ISAC, IUCAA, SAC and PRL. The Indian Space Research Organisation funded, managed and facilitated the project.
GCN Circular #19849
A.J Nayana (NCRA-TIFR), Poonam Chandra (NCRA-TIFR), A. R. Rao (TIFR), Dipankar Bhattacharya (IUCAA) and Varun Bhalerao (IUCAA) report:
We carried out Giant Metrewave Radio Telescope (GMRT) observations of GRB 160703A (Cenko et al. GCN Circ. 19645) at 1460 MHz band on 2016 Aug 11.79 UT. We detect a faint source at the GRB position (Cenko et al. GCN Circ. 19645) with a flux density of 166+/-46 uJy. This is most likely the radio afterglow of GRB 160703A. Map rms is 40 uJy.
We thank GMRT staff for making these observations possible.

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