Gamma-ray Burst 160912A

(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 12 Sep 16 16:22:41 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     711914,   Seg_Num: 0
GRB_RA:          301.518d {+20h 06m 04s} (J2000),
                 301.607d {+20h 06m 26s} (current),
                 301.250d {+20h 05m 00s} (1950)
GRB_DEC:         +57.543d {+57d 32' 36"} (J2000),
                 +57.592d {+57d 35' 31"} (current),
                 +57.398d {+57d 23' 54"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=1494 [image_cnts]
TRIGGER_DUR:     64.000 [sec] 
TRIGGER_INDEX:   20000     E_range: 15-50 keV
BKG_INTEN:       0 [cnts]
BKG_TIME:        0.00 SOD {00:00:00.00} UT
BKG_DUR:         0 [sec]
GRB_DATE:        17643 TJD;   256 DOY;   16/09/12
GRB_TIME:        58063.14 SOD {16:07:43.14} UT
GRB_PHI:         -25.02 [deg]
GRB_THETA:        22.35 [deg]
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    7.97 [sigma]
MERIT_PARAMS:     +1  +0  +0  +6  +1  -2  +0  +0 +29  +0 
SUN_POSTN:       171.11d {+11h 24m 27s}   +3.83d {+03d 49' 50"}
SUN_DIST:        106.91 [deg]   Sun_angle= -8.7 [hr] (East of Sun)
MOON_POSTN:      298.39d {+19h 53m 34s}  -17.04d {-17d 02' 20"}
MOON_DIST:        74.68 [deg]
MOON_ILLUM:      80 [%]
GAL_COORDS:       91.42, 13.41 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      343.31, 72.97 [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 an image trigger.  (The RATE_SIGNIF & BKG_{INTEN, TIME, DUR} are undefined.)  
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 = 11.83,-10.11 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Mon 12 Sep 16 16:10:19 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      45
TRIGGER_NUM:     495389415
GRB_RA:          292.917d {+19h 31m 40s} (J2000),
                 293.037d {+19h 32m 09s} (current),
                 292.556d {+19h 30m 13s} (1950)
GRB_DEC:         +47.483d {+47d 28' 60"} (J2000),
                 +47.520d {+47d 31' 11"} (current),
                 +47.376d {+47d 22' 33"} (1950)
GRB_ERROR:       16.68 [deg radius, statistical plus systematic]
GRB_INTEN:       87 [cnts/sec]
DATA_SIGNIF:     5.90 [sigma]
INTEG_TIME:      2.048 [sec]
GRB_DATE:        17643 TJD;   256 DOY;   16/09/12
GRB_TIME:        58211.39 SOD {16:10:11.39} UT
GRB_PHI:         110.00 [deg]
GRB_THETA:        75.00 [deg]
DATA_TIME_SCALE: 2.0480 [sec]
HARD_RATIO:      0.00
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:     100%  Below horizon
2nd_MOST_LIKELY:   0%  n/a
DETECTORS:       0,0,0, 0,0,0, 0,0,0, 1,1,0, 0,0,
SUN_POSTN:       171.11d {+11h 24m 25s}   +3.83d {+03d 50' 02"}
SUN_DIST:        107.88 [deg]   Sun_angle= -8.1 [hr] (East of Sun)
MOON_POSTN:      298.28d {+19h 53m 06s}  -17.05d {-17d 03' 11"}
MOON_DIST:        64.74 [deg]
MOON_ILLUM:      80 [%]
GAL_COORDS:       79.78, 13.36 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      313.44, 67.50 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2016/bn160912674/quicklook/glg_lc_medres34_bn160912674.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 241.63,11.25 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 12 Sep 16 16:23:08 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     711914,   Seg_Num: 0
POINT_RA:        301.514d {+20h 06m 03s} (J2000)
POINT_DEC:       +57.541d {+57d 32' 26"} (J2000)
IMG_START_DATE:  17643 TJD;   256 DOY;   16/09/12
IMG_START_TIME:  58197.06 SOD {16:09:57.06} UT,   133.9 [sec] since BAT Trigger Time
COUNTS:          18    Min_needed= 20
STD_DEV:         0.00   Max_StdDev_for_Good=28.44 [arcsec]
PH2_ITER:        2    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 12 Sep 16 16:23:24 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     711914,   Seg_Num: 0
GRB_RA:          301.518d {+20h 06m 04s} (J2000),
                 301.607d {+20h 06m 26s} (current),
                 301.250d {+20h 05m 00s} (1950)
GRB_DEC:         +57.543d {+57d 32' 36"} (J2000),
                 +57.592d {+57d 35' 31"} (current),
                 +57.398d {+57d 23' 54"} (1950)
GRB_DATE:        17643 TJD;   256 DOY;   16/09/12
GRB_TIME:        58063.14 SOD {16:07:43.14} UT
TRIGGER_INDEX:   20000
GRB_PHI:         -25.02 [deg]
GRB_THETA:        22.35 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     64.000 [sec] 
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    7.97 [sigma]
LC_URL:          sw00711914000msb.lc
SUN_POSTN:       171.11d {+11h 24m 27s}   +3.83d {+03d 49' 50"}
SUN_DIST:        106.91 [deg]   Sun_angle= -8.7 [hr] (East of Sun)
MOON_POSTN:      298.40d {+19h 53m 36s}  -17.04d {-17d 02' 18"}
MOON_DIST:        74.68 [deg]
MOON_ILLUM:      80 [%]
GAL_COORDS:       91.42, 13.41 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      343.31, 72.97 [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 an image 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 = 11.83,-10.11 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 12 Sep 16 16:23:51 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     711914,   Seg_Num: 0
POINT_RA:        301.513d {+20h 06m 03s} (J2000)
POINT_DEC:       +57.540d {+57d 32' 25"} (J2000)
POINT_ROLL:      307.408d
IMG_START_DATE:  17643 TJD;   256 DOY;   16/09/12
IMG_START_TIME:  58200.40 SOD {16:10:00.40} UT,   137.3 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.774
N_STARS:         190
X_OFFSET:        507 [pixels]
Y_OFFSET:        589 [pixels]
X_MAX:           1466 [pixels]
Y_MAX:           1548 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00711914000msufc0137.fits
SUN_POSTN:       171.11d {+11h 24m 27s}   +3.83d {+03d 49' 49"}
SUN_DIST:        106.91 [deg]   Sun_angle= -8.7 [hr] (East of Sun)
MOON_POSTN:      298.40d {+19h 53m 37s}  -17.04d {-17d 02' 16"}
MOON_DIST:        74.67 [deg]
MOON_ILLUM:      80 [%]
GAL_COORDS:       91.41, 13.41 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      343.30, 72.97 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 12 Sep 16 16:24:29 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     711914,   Seg_Num: 0
POINT_RA:        301.513d {+20h 06m 03s} (J2000)
POINT_DEC:       +57.540d {+57d 32' 25"} (J2000)
POINT_ROLL:      307.408d
IMG_START_DATE:  17643 TJD;   256 DOY;   16/09/12
IMG_START_TIME:  58200.40 SOD {16:10:00.40} UT,   137.3 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.774
N_STARS:         190
X_OFFSET:        507 [pixels]
Y_OFFSET:        589 [pixels]
X_MAX:           1466 [pixels]
Y_MAX:           1548 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00711914000msufc0137.fits
SUN_POSTN:       171.11d {+11h 24m 27s}   +3.83d {+03d 49' 49"}
SUN_DIST:        106.91 [deg]   Sun_angle= -8.7 [hr] (East of Sun)
MOON_POSTN:      298.41d {+19h 53m 38s}  -17.04d {-17d 02' 13"}
MOON_DIST:        74.67 [deg]
MOON_ILLUM:      80 [%]
GAL_COORDS:       91.41, 13.41 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      343.30, 72.97 [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:     Mon 12 Sep 16 16:25:17 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     711914,   Seg_Num: 0
POINT_RA:        301.513d {+20h 06m 03s} (J2000)
POINT_DEC:       +57.540d {+57d 32' 25"} (J2000)
ROLL:            307.408d
IMG_START_DATE:  17643 TJD;   256 DOY;   16/09/12
IMG_START_TIME:  58200.40 SOD {16:10:00.40} UT,   137.3 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     495389417
X_OFFSET:        826 [pixels]
Y_OFFSET:        908 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       986
Y_GRB_POS:       1068
BINNING_INDEX:   1
IM_URL:          sw00711914000msuni0154.fits
SUN_POSTN:       171.12d {+11h 24m 28s}   +3.83d {+03d 49' 48"}
SUN_DIST:        106.91 [deg]   Sun_angle= -8.7 [hr] (East of Sun)
MOON_POSTN:      298.42d {+19h 53m 40s}  -17.04d {-17d 02' 10"}
MOON_DIST:        74.67 [deg]
MOON_ILLUM:      80 [%]
GAL_COORDS:       91.41, 13.41 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      343.30, 72.97 [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:     Mon 12 Sep 16 16:25:27 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     711914,   Seg_Num: 0
POINT_RA:        301.513d {+20h 06m 03s} (J2000)
POINT_DEC:       +57.540d {+57d 32' 25"} (J2000)
ROLL:            307.408d
IMG_START_DATE:  17643 TJD;   256 DOY;   16/09/12
IMG_START_TIME:  58200.40 SOD {16:10:00.40} UT,   137.3 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     495389417
X_OFFSET:        826 [pixels]
Y_OFFSET:        908 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       986
Y_GRB_POS:       1068
BINNING_INDEX:   1
IM_URL:          sw00711914000msuni0154.fits
SUN_POSTN:       171.12d {+11h 24m 28s}   +3.83d {+03d 49' 48"}
SUN_DIST:        106.91 [deg]   Sun_angle= -8.7 [hr] (East of Sun)
MOON_POSTN:      298.42d {+19h 53m 40s}  -17.04d {-17d 02' 09"}
MOON_DIST:        74.67 [deg]
MOON_ILLUM:      80 [%]
GAL_COORDS:       91.41, 13.41 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      343.30, 72.97 [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:     Mon 12 Sep 16 16:28:24 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     711914,   Seg_Num: 0
POINT_RA:        301.513d {+20h 06m 03s} (J2000)
POINT_DEC:       +57.538d {+57d 32' 15"} (J2000)
POINT_ROLL:      307.407d
IMG_START_DATE:  17643 TJD;   256 DOY;   16/09/12
IMG_START_TIME:  58358.41 SOD {16:12:38.41} UT,   295.3 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.595
N_STARS:         190
X_OFFSET:        267 [pixels]
Y_OFFSET:        349 [pixels]
X_MAX:           1706 [pixels]
Y_MAX:           1788 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00711914000msufc0295.fits
SUN_POSTN:       171.12d {+11h 24m 28s}   +3.83d {+03d 49' 45"}
SUN_DIST:        106.91 [deg]   Sun_angle= -8.7 [hr] (East of Sun)
MOON_POSTN:      298.45d {+19h 53m 47s}  -17.03d {-17d 01' 57"}
MOON_DIST:        74.67 [deg]
MOON_ILLUM:      80 [%]
GAL_COORDS:       91.41, 13.41 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      343.29, 72.97 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 12 Sep 16 16:28:36 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     711914,   Seg_Num: 0
POINT_RA:        301.513d {+20h 06m 03s} (J2000)
POINT_DEC:       +57.538d {+57d 32' 15"} (J2000)
POINT_ROLL:      307.407d
IMG_START_DATE:  17643 TJD;   256 DOY;   16/09/12
IMG_START_TIME:  58358.41 SOD {16:12:38.41} UT,   295.3 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.595
N_STARS:         190
X_OFFSET:        267 [pixels]
Y_OFFSET:        349 [pixels]
X_MAX:           1706 [pixels]
Y_MAX:           1788 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00711914000msufc0295.fits
SUN_POSTN:       171.12d {+11h 24m 28s}   +3.83d {+03d 49' 45"}
SUN_DIST:        106.91 [deg]   Sun_angle= -8.7 [hr] (East of Sun)
MOON_POSTN:      298.45d {+19h 53m 47s}  -17.03d {-17d 01' 56"}
MOON_DIST:        74.66 [deg]
MOON_ILLUM:      80 [%]
GAL_COORDS:       91.41, 13.41 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      343.29, 72.97 [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:     Mon 12 Sep 16 16:29:25 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     711914,   Seg_Num: 0
POINT_RA:        301.513d {+20h 06m 03s} (J2000)
POINT_DEC:       +57.538d {+57d 32' 15"} (J2000)
ROLL:            307.407d
IMG_START_DATE:  17643 TJD;   256 DOY;   16/09/12
IMG_START_TIME:  58358.41 SOD {16:12:38.41} UT,   295.3 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     495389575
X_OFFSET:        826 [pixels]
Y_OFFSET:        908 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       986
Y_GRB_POS:       1068
BINNING_INDEX:   1
IM_URL:          sw00711914000msuni0312.fits
SUN_POSTN:       171.12d {+11h 24m 28s}   +3.83d {+03d 49' 44"}
SUN_DIST:        106.91 [deg]   Sun_angle= -8.7 [hr] (East of Sun)
MOON_POSTN:      298.46d {+19h 53m 49s}  -17.03d {-17d 01' 53"}
MOON_DIST:        74.66 [deg]
MOON_ILLUM:      80 [%]
GAL_COORDS:       91.41, 13.41 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      343.29, 72.97 [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:     Mon 12 Sep 16 16:29:50 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     711914,   Seg_Num: 0
POINT_RA:        301.513d {+20h 06m 03s} (J2000)
POINT_DEC:       +57.538d {+57d 32' 15"} (J2000)
ROLL:            307.407d
IMG_START_DATE:  17643 TJD;   256 DOY;   16/09/12
IMG_START_TIME:  58358.41 SOD {16:12:38.41} UT,   295.3 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     495389575
X_OFFSET:        826 [pixels]
Y_OFFSET:        908 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       986
Y_GRB_POS:       1068
BINNING_INDEX:   1
IM_URL:          sw00711914000msuni0312.fits
SUN_POSTN:       171.12d {+11h 24m 28s}   +3.83d {+03d 49' 43"}
SUN_DIST:        106.91 [deg]   Sun_angle= -8.7 [hr] (East of Sun)
MOON_POSTN:      298.46d {+19h 53m 50s}  -17.03d {-17d 01' 51"}
MOON_DIST:        74.66 [deg]
MOON_ILLUM:      80 [%]
GAL_COORDS:       91.41, 13.41 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      343.29, 72.97 [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:     Mon 12 Sep 16 16:32:29 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     711914,   Seg_Num: 0
POINT_RA:        301.513d {+20h 06m 03s} (J2000)
POINT_DEC:       +57.538d {+57d 32' 15"} (J2000)
POINT_ROLL:      307.407d
IMG_START_DATE:  17643 TJD;   256 DOY;   16/09/12
IMG_START_TIME:  58936.32 SOD {16:22:16.32} UT,   873.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.661
N_STARS:         190
X_OFFSET:        267 [pixels]
Y_OFFSET:        349 [pixels]
X_MAX:           1706 [pixels]
Y_MAX:           1788 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00711914000msufc0873.fits
SUN_POSTN:       171.12d {+11h 24m 29s}   +3.83d {+03d 49' 41"}
SUN_DIST:        106.91 [deg]   Sun_angle= -8.7 [hr] (East of Sun)
MOON_POSTN:      298.48d {+19h 53m 56s}  -17.03d {-17d 01' 40"}
MOON_DIST:        74.66 [deg]
MOON_ILLUM:      80 [%]
GAL_COORDS:       91.41, 13.41 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      343.29, 72.97 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 12 Sep 16 16:32:35 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     711914,   Seg_Num: 0
GRB_RA:          301.4977d {+20h 05m 59.44s} (J2000),
                 301.5869d {+20h 06m 20.84s} (current),
                 301.2302d {+20h 04m 55.25s} (1950)
GRB_DEC:         +57.5660d {+57d 33' 57.6"} (J2000),
                 +57.6146d {+57d 36' 52.6"} (current),
                 +57.4211d {+57d 25' 15.9"} (1950)
GRB_ERROR:       3.6 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  17643 TJD;   256 DOY;   16/09/12
IMG_START_TIME:  58741.00 SOD {16:19:01.00} UT,   677.9 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       171.12d {+11h 24m 29s}   +3.83d {+03d 49' 41"}
SUN_DIST:        106.89 [deg]   Sun_angle= -8.7 [hr] (East of Sun)
MOON_POSTN:      298.48d {+19h 53m 56s}  -17.03d {-17d 01' 40"}
MOON_DIST:        74.69 [deg]
MOON_ILLUM:      80 [%]
GAL_COORDS:       91.43, 13.43 [deg] galactic lon,lat of the burst
ECL_COORDS:      343.34, 72.99 [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 1.1% < P(seren) < 2.8%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 12 Sep 16 16:32:51 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     711914,   Seg_Num: 0
POINT_RA:        301.513d {+20h 06m 03s} (J2000)
POINT_DEC:       +57.538d {+57d 32' 15"} (J2000)
POINT_ROLL:      307.407d
IMG_START_DATE:  17643 TJD;   256 DOY;   16/09/12
IMG_START_TIME:  58936.32 SOD {16:22:16.32} UT,   873.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.661
N_STARS:         190
X_OFFSET:        267 [pixels]
Y_OFFSET:        349 [pixels]
X_MAX:           1706 [pixels]
Y_MAX:           1788 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00711914000msufc0873.fits
SUN_POSTN:       171.12d {+11h 24m 29s}   +3.83d {+03d 49' 41"}
SUN_DIST:        106.91 [deg]   Sun_angle= -8.7 [hr] (East of Sun)
MOON_POSTN:      298.49d {+19h 53m 57s}  -17.03d {-17d 01' 39"}
MOON_DIST:        74.66 [deg]
MOON_ILLUM:      80 [%]
GAL_COORDS:       91.41, 13.41 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      343.29, 72.97 [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:     Mon 12 Sep 16 16:33:15 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     711914,   Seg_Num: 0
POINT_RA:        301.513d {+20h 06m 03s} (J2000)
POINT_DEC:       +57.538d {+57d 32' 15"} (J2000)
ROLL:            307.407d
IMG_START_DATE:  17643 TJD;   256 DOY;   16/09/12
IMG_START_TIME:  58936.32 SOD {16:22:16.32} UT,   873.2 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     495390153
X_OFFSET:        826 [pixels]
Y_OFFSET:        908 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       986
Y_GRB_POS:       1068
BINNING_INDEX:   1
IM_URL:          sw00711914000msuni0890.fits
SUN_POSTN:       171.12d {+11h 24m 29s}   +3.83d {+03d 49' 40"}
SUN_DIST:        106.91 [deg]   Sun_angle= -8.7 [hr] (East of Sun)
MOON_POSTN:      298.49d {+19h 53m 58s}  -17.03d {-17d 01' 37"}
MOON_DIST:        74.66 [deg]
MOON_ILLUM:      80 [%]
GAL_COORDS:       91.41, 13.41 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      343.29, 72.97 [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:     Mon 12 Sep 16 16:33:29 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     711914,   Seg_Num: 0
POINT_RA:        301.513d {+20h 06m 03s} (J2000)
POINT_DEC:       +57.538d {+57d 32' 15"} (J2000)
ROLL:            307.407d
IMG_START_DATE:  17643 TJD;   256 DOY;   16/09/12
IMG_START_TIME:  58936.32 SOD {16:22:16.32} UT,   873.2 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     495390153
X_OFFSET:        826 [pixels]
Y_OFFSET:        908 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       986
Y_GRB_POS:       1068
BINNING_INDEX:   1
IM_URL:          sw00711914000msuni0890.fits
SUN_POSTN:       171.12d {+11h 24m 29s}   +3.83d {+03d 49' 40"}
SUN_DIST:        106.91 [deg]   Sun_angle= -8.7 [hr] (East of Sun)
MOON_POSTN:      298.49d {+19h 53m 58s}  -17.03d {-17d 01' 36"}
MOON_DIST:        74.66 [deg]
MOON_ILLUM:      80 [%]
GAL_COORDS:       91.41, 13.41 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      343.29, 72.97 [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:     Mon 12 Sep 16 16:33:19 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     711914,   Seg_Num: 0
GRB_RA:          301.4975d {+20h 05m 59.40s} (J2000),
                 301.5867d {+20h 06m 20.79s} (current),
                 301.2300d {+20h 04m 55.20s} (1950)
GRB_DEC:         +57.5656d {+57d 33' 56.1"} (J2000),
                 +57.6142d {+57d 36' 51.2"} (current),
                 +57.4207d {+57d 25' 14.5"} (1950)
GRB_ERROR:       2.1 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  17643 TJD;   256 DOY;   16/09/12
IMG_START_TIME:  58741.00 SOD {16:19:01.00} UT,   677.9 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       171.12d {+11h 24m 29s}   +3.83d {+03d 49' 40"}
SUN_DIST:        106.89 [deg]   Sun_angle= -8.7 [hr] (East of Sun)
MOON_POSTN:      298.49d {+19h 53m 58s}  -17.03d {-17d 01' 37"}
MOON_DIST:        74.69 [deg]
MOON_ILLUM:      80 [%]
GAL_COORDS:       91.43, 13.43 [deg] galactic lon,lat of the burst
ECL_COORDS:      343.34, 72.99 [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 1.1% < P(seren) < 2.8%.

GCN Circular #19912
J. K. Cannizzo (NASA/UMBC), S. D. Barthelmy (GSFC), A. A. Breeveld (UCL-MSSL), D. N. Burrows (PSU), A. D'Ai (INAF-IASFPA), V. D'Elia (ASDC), S. W. K Emery (UCL-MSSL), J. A. Kennea (PSU), N. P. M. Kuin (UCL-MSSL), F. E. Marshall (NASA/GSFC), B. Mingo (U Leicester), K. L. Page (U Leicester) and M. H. Siegel (PSU) report on behalf of the Swift Team:
At 16:07:43 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 160912A (trigger=711914). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 301.518, +57.543, which is
```
   RA(J2000)  =  20h 06m 04s
   Dec(J2000) = +57d 32' 36"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). As is typical for image triggers, the BAT light curve does not show anything significant over the trigger window. However, at ~T+150 sec there is a flare in the light curve (~1300 cnts/sec).
The XRT began observing the field at 16:09:57.0 UT, 134.0 seconds after the BAT trigger. Using promptly downlinked data we find a fading, uncatalogued X-ray source with an enhanced position: RA, Dec 301.4981, 57.5655 which is equivalent to:
```
   RA(J2000)  = 20h 05m 59.56s
   Dec(J2000) = +57d 33' 55.8"
```
with an uncertainty of 2.1 arcseconds (radius, 90% containment). This location is 89 arcseconds from the BAT onboard position, within the BAT error circle. This position may be improved as more data are received; the latest position is available at http://www.swift.ac.uk/sper.
We note the presence in the XRT raw light curve of a large X-ray flare coincident with the BAT flare mentioned above.
A power-law fit to a spectrum formed from promptly downlinked event data gives a column density consistent with the Galactic value of 2.35 x 10^21 cm^-2 (Willingale et al. 2013).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 137 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers 100% 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 0.20.
Burst Advocate for this burst is J. K. Cannizzo (cannizzo AT milkyway.gsfc.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 Circular #19915
A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team.
Using 1795 s of XRT Photon Counting mode data and 1 UVOT images for GRB 160912A, 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 = 301.49915, +57.56557 which is equivalent to:
```
RA (J2000): 20h 05m 59.80s
Dec (J2000): +57d 33' 56.0"
```
with an uncertainty of 1.7 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 #19916
R. Hamburg (UAH) reports on behalf of the Fermi GBM Team:
"At 16:10:11.39 UT on 12 September 2016, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 160912A (trigger 495389415 / 160912674).
This burst was also detected by the Swift BAT approximately 150 s after the Swift trigger time and reported as an x-ray flare approximately 89 arcseconds from the BAT onboard position (Cannizzo et al. 2016, GCN 19912). At the time of the Swift trigger, the source was occulted by the Earth for Fermi. The GBM on-ground location is consistent with the Swift position.
The GBM light curve consists of multiple peaks with a duration (T90) of about 48 s (10-1000 keV). The time-averaged spectrum from T0-4 s to T0+42 s is best fit by a simple power law function with index -1.48 +/- 0.03.
The event fluence (10-1000 keV) in this time interval is (6.1 +/- 0.3)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0+8.4 s in the 10-1000 keV band is 1.6 +/- 0.2 ph/s/cm^2.
The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN Circular #19917
L.M. McCauley (PSU), J.A. Kennea (PSU), B. Sbarufatti (INAF-OAB/PSU), B. Mingo (U. Leicester), A.P. Beardmore (U. Leicester), P.A. Evans (U. Leicester), V. D'Elia (ASDC), A. D'Ai (INAF-IASFPA), A. Melandri (INAF-OAB) and J.K. Cannizzo report on behalf of the Swift-XRT team:
We have analysed 8.0 ks of XRT data for GRB 160912A (Cannizzo et al. GCN Circ. 19912), from 119 s to 36.9 ks after the BAT trigger. The data comprise 776 s in Windowed Timing (WT) mode (the first 9 s were 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. 19915).
The late-time light curve (from T0+5.8 ks) can be modelled with a power-law decay with a decay index of alpha=.
A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 1.63 (+/-0.04). The best-fitting absorption column is 2.80 (+/-0.20) x 10^21 cm^-2, in excess of the Galactic value of 2.4 x 10^21 cm^-2 (Willingale et al. 2013). The PC mode spectrum has a photon index of 1.81 (+0.11, -0.10) and a best-fitting absorption column of 3.0 (+/-0.5) x 10^21 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 4.2 x 10^-11 (5.6 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     3.0 (+/-0.5) x 10^21 cm^-2
Galactic foreground: 2.4 x 10^21 cm^-2
Excess significance: 2.1 sigma
Photon index:	     1.81 (+0.11, -0.10)
```
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00711914.
This circular is an official product of the Swift-XRT team.
GCN Circular #19918
N. R. Tanvir (U. Leicester), A. J. Levan (U. Warwick), report on behalf of a larger collaboration:
We observed the field of Swift GRB 160912A (Cannizzo et al. GCN 19912) with the 2m Liverpool Telescope on La Palma with the IO:O camera.
Images were obtained in the r and i filters at two epochs, each exposure being 25 mins in total. Within the revised X-ray error circle (Beardmore et al. GCN 19915) we find a point source with the following provisional magnitudes and start times relative to the BAT trigger time:
```
epoch1 dt=17053s i=22.10+/-0.15
epoch1 dt=18664s r=22.77+/-0.20
epoch2 dt=29285s i=22.57+/-0.17
epoch2 dt=30897s r=23.11+/-0.21
```
Given the evidence for fading, we conclude this is likely the optical afterglow of the GRB.
The J2000 position of the source is 20:05:59.68 +57:33:54.9 to an accuracy of about 0.5".
GCN Circular #19920
A. Volnova (IKI), A. Pozanenko (IKI), E. Klunko (ISTP), E. Mazaeva (IKI), I. Korobtsev (ISTP) report on behalf of larger GRB follow-up collaboration:
We observed the field of the GRB 160912A (Cannizzo et al. GCN 19912) with AZT-33IK telescope of Sayan observatory (Mondy) starting on Sep., 12 (UT) 18:14:25. We obtained several images in R-filter. We clearly detected optical afterglow (Tanvir et al., GCN 1991). Coordinates of the afterglow are (J2000) 20 05 59.64 +57 33 55.2 with uncertainty of 0.4 arcsec in both coordinates. The afterglow is 5 arcsec from nearby star (USNO-B1.0 1475-0371357 (J2000) RA = 20:06:00.32 Dec = +57:33:57.0 R2 = 18.21) and within enhanced XRT position (Beardmore et al. GCN 19915). Preliminary photometry of the afterglow is following
```
Date        UT start   t-T0      Filter Exp.   OT        UL (3 sigma)
                        (mid, days)       (s)

2016-09-12  18:14:25   0.10883    R     30*120 22.57 +/-0.08  23.5
```
Photometry is based on nearby USNO-B1.0 stars
```
ID             RA           Dec        R2
2 1475-0371275 20:05:49.83 +57:33:12.9 17.09
3 1475-0371352 20:05:59.47 +57:32:43.8 17.46
4 1475-0371174 20:05:41.08 +57:33:00.0 17.43
5 1475-0371504 20:06:16.57 +57:32:46.8 17.62
```
The finding chart can be found at http://grb.rssi.ru/GRB160912A/GRB160912A_160912_AZT33IK_fc.png
GCN Circular #19921
F. E. Marshall (NASA/GSFC) and J. K. Cannizzo (NASA/UMBC) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 160912A 138 s after the BAT trigger (Cannizzo et al., GCN Circ. 19912). There is a weak detection of a source consistent with the XRT position (Beardmore et al., GCN Circ. 19915) and the optical afterglow positions (Tanvir and Levan, GCN Circ. 19918; Mazaeva et al., GCN Circ. 19919) in the initial UVOT exposures. There is little evidence for variability.
The preliminary UVOT position is:
```
   RA  (J2000) =  20:05:59.74  = 301.49893 (deg.)
   Dec (J2000) =  +57:33:56.0  =  57.56555 (deg.)
```
with an estimated uncertainty of 1.0 arcsec. (radius, 90% confidence).
Preliminary detections and 2-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

white              138         8135          883         22.03 +/- 0.27
v                  626         7110          411         20.60 +/- 0.44
b                  552         7931          584        >22.14
u                  296         7726          814        >21.92
w1                 675         7520          588        >21.25
m2                 650         7314          391        >20.75
w2                 602         8215          484        >21.05
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.20 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #19922
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 (UVI), 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 160912A (Cannizzo et al., GCN 19912) 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 2016/09 13.14 to 2016/09 13.24 UTC (11.20 to 13.52 hours after the BAT trigger), obtaining a total of 1.76 hours exposure in the r and i bands and 0.74 hours exposure in the Z, Y, J, and H bands.
We detect the optical afterglow reported by Tanvir et al. (GCN 19918). In comparison with the USNO-B1 and 2MASS catalogs, we obtain the following detections and (3-sigma) upper limits:
```
r =3D 23.05 +/- 0.10
i =3D 22.73 +/- 0.13
Z =3D 22.62 +/- 0.31
Y =3D 22.13 +/- 0.29
J > 21.91
H > 21.72
```
These magnitudes are in the AB system and are not corrected for Galactic extinction in the direction of the GRB.
We thank the staff of the Observatorio Astron=F3mico Nacional in San Pedro M=E1rtir.
GCN Circular #19924
J. R. Cummings (GSFC/UMBC), S. D. Barthelmy (GSFC), J. K. Cannizzo (NASA/UMBC), 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-239 to T+959 sec from the recent telemetry downlink, we report further analysis of BAT GRB 160912A (trigger #711914) (Cannizzo, et al., GCN Circ. 19912). The BAT ground-calculated position is RA, Dec = 301.595, 57.585 deg which is
```
  RA(J2000)  =  20h 06m 22.7s
  Dec(J2000) = +57d 35' 04.8"
```
with an uncertainty of 2.7 arcmin, (radius, sys+stat, 90% containment). The partial coding was 96%.
The mask-weighted light curve shows some weak emissions that starts at ~ T-33 s, and a FRED-like pulse from ~T+140 s to ~T+200 s. We do not have much information of the burst emission afterwards due to some large gaps in the data after ~T+320 s.
The time-averaged spectrum using the available data from T-33 to T+211 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.43 +- 0.11. The fluence in the 15-150 keV band is 3.7 +- 0.3 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+148.56 sec in the 15-150 keV band is 1.6 +- 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/711914/BA/
GCN Circular #19950
K. P. Mooley, T. D. Staley, R. P. Fender (Oxford), G. E. Anderson (Curtin), T. Cantwell (Manchester), 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 160912A (Cannizzo et al., GCN 19912) 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 Sep 12.72, Sep 13.81, and Sep 18.87 (UT) do not reveal any radio source at the XRT location (Beardmore et al., GCN 19915), with 3sigma upper limits of 147 uJy, 258 uJy, and 102 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: 27-Sep-2016 [Disclaimer]