Gamma-ray Burst 160410A

(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 10 Apr 16 05:10:04 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     682269,   Seg_Num: 0
GRB_RA:          150.681d {+10h 02m 43s} (J2000),
                 150.892d {+10h 03m 34s} (current),
                 150.032d {+10h 00m 08s} (1950)
GRB_DEC:          +3.443d {+03d 26' 37"} (J2000),
                  +3.364d {+03d 21' 52"} (current),
                  +3.685d {+03d 41' 08"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       2124 [cnts]    Image_Peak=127 [image_cnts]
TRIGGER_DUR:     0.256 [sec] 
TRIGGER_INDEX:   126     E_range: 50-350 keV
BKG_INTEN:       21006 [cnts]
BKG_TIME:        18575.89 SOD {05:09:35.89} UT
BKG_DUR:         8 [sec]
GRB_DATE:        17488 TJD;   101 DOY;   16/04/10
GRB_TIME:        18588.05 SOD {05:09:48.05} UT
GRB_PHI:         148.93 [deg]
GRB_THETA:        36.75 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     55.07 [sigma]
IMAGE_SIGNIF:    9.07 [sigma]
MERIT_PARAMS:     +1  +0  +0  -2  +3  +0  +0  +0 +64  +0 
SUN_POSTN:        19.19d {+01h 16m 45s}   +8.11d {+08d 06' 29"}
SUN_DIST:        130.48 [deg]   Sun_angle= -8.8 [hr] (East of Sun)
MOON_POSTN:       58.43d {+03h 53m 43s}  +15.39d {+15d 23' 08"}
MOON_DIST:        91.48 [deg]
MOON_ILLUM:      11 [%]
GAL_COORDS:      235.88, 43.29 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      151.51, -8.01 [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 = 249.59,-18.80 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 10 Apr 16 05:11:41 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     682269,   Seg_Num: 0
GRB_RA:          150.6857d {+10h 02m 44.56s} (J2000),
                 150.8969d {+10h 03m 35.24s} (current),
                 150.0365d {+10h 00m 08.76s} (1950)
GRB_DEC:          +3.4782d {+03d 28' 41.5"} (J2000),
                  +3.3991d {+03d 23' 56.8"} (current),
                  +3.7202d {+03d 43' 12.6"} (1950)
GRB_ERROR:       5.6 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.04e-09 [erg/cm2/sec]
GRB_SIGNIF:      6.48 [sigma]
IMG_START_DATE:  17488 TJD;   101 DOY;   16/04/10
IMG_START_TIME:  18670.99 SOD {05:11:10.99} UT,   82.9 [sec] since BAT Trigger Time
TAM[0-3]:        327.67 237.18 261.72 243.67
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:        19.19d {+01h 16m 45s}   +8.11d {+08d 06' 30"}
SUN_DIST:        130.48 [deg]   Sun_angle= -8.8 [hr] (East of Sun)
MOON_POSTN:       58.45d {+03h 53m 47s}  +15.39d {+15d 23' 18"}
MOON_DIST:        91.45 [deg]
MOON_ILLUM:      11 [%]
GAL_COORDS:      235.85, 43.32 [deg] galactic lon,lat of the burst
ECL_COORDS:      151.50, -7.97 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 2.10 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 10 Apr 16 05:11:51 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     682269,   Seg_Num: 0
GRB_RA:          150.6857d {+10h 02m 44.5s} (J2000),
                 150.8969d {+10h 03m 35.2s} (current),
                 150.0365d {+10h 00m 08.7s} (1950)
GRB_DEC:          +3.4782d {+03d 28' 41.5"} (J2000),
                  +3.3991d {+03d 23' 56.8"} (current),
                  +3.7202d {+03d 43' 12.6"} (1950)
GRB_ERROR:       5.4 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       42 [cnts]
IMG_START_DATE:  17488 TJD;   101 DOY;   16/04/10
IMG_START_TIME:  18670.99 SOD {05:11:10.99} UT,   82.9 [sec] since BAT Trigger Time
CENTROID_X:      323.15,  raw= 323  [pixels]
CENTROID_Y:      254.42,  raw= 254  [pixels]
ROLL:            283.67 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -102.24
GRB_POS_XRT_Z:   42.09
IMAGE_URL:       sw00682269000msxps_rw.img
SUN_POSTN:        19.19d {+01h 16m 45s}   +8.11d {+08d 06' 30"}
SUN_DIST:        130.48 [deg]   Sun_angle= -8.8 [hr] (East of Sun)
MOON_POSTN:       58.45d {+03h 53m 48s}  +15.39d {+15d 23' 19"}
MOON_DIST:        91.45 [deg]
MOON_ILLUM:      11 [%]
GAL_COORDS:      235.85, 43.32 [deg] galactic lon,lat of the burst
ECL_COORDS:      151.50, -7.97 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 10 Apr 16 05:12:00 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     682269,   Seg_Num: 0
GRB_RA:          150.6857d {+10h 02m 44.5s} (J2000),
                 150.8969d {+10h 03m 35.2s} (current),
                 150.0365d {+10h 00m 08.7s} (1950)
GRB_DEC:          +3.4782d {+03d 28' 41.5"} (J2000),
                  +3.3991d {+03d 23' 56.8"} (current),
                  +3.7202d {+03d 43' 12.6"} (1950)
GRB_ERROR:       5.4 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       42 [cnts]
IMG_START_DATE:  17488 TJD;   101 DOY;   16/04/10
IMG_START_TIME:  18670.99 SOD {05:11:10.99} UT,   82.9 [sec] since BAT Trigger Time
CENTROID_X:      323.15,  raw= 323  [pixels]
CENTROID_Y:      254.42,  raw= 254  [pixels]
ROLL:            283.67 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -102.24
GRB_POS_XRT_Z:   42.09
IMAGE_URL:       sw00682269000msxps_rw.img
SUN_POSTN:        19.19d {+01h 16m 45s}   +8.11d {+08d 06' 30"}
SUN_DIST:        130.48 [deg]   Sun_angle= -8.8 [hr] (East of Sun)
MOON_POSTN:       58.45d {+03h 53m 48s}  +15.39d {+15d 23' 20"}
MOON_DIST:        91.45 [deg]
MOON_ILLUM:      11 [%]
GAL_COORDS:      235.85, 43.32 [deg] galactic lon,lat of the burst
ECL_COORDS:      151.50, -7.97 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 10 Apr 16 05:15:01 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     682269,   Seg_Num: 0
GRB_RA:          150.681d {+10h 02m 43s} (J2000),
                 150.892d {+10h 03m 34s} (current),
                 150.032d {+10h 00m 08s} (1950)
GRB_DEC:          +3.443d {+03d 26' 37"} (J2000),
                  +3.364d {+03d 21' 52"} (current),
                  +3.685d {+03d 41' 08"} (1950)
GRB_DATE:        17488 TJD;   101 DOY;   16/04/10
GRB_TIME:        18588.05 SOD {05:09:48.05} UT
TRIGGER_INDEX:   126
GRB_PHI:         148.93 [deg]
GRB_THETA:        36.75 [deg]
DELTA_TIME:      17293.00 [sec]
TRIGGER_DUR:     0.256 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     55.07 [sigma]
IMAGE_SIGNIF:    9.07 [sigma]
LC_URL:          sw00682269000msb.lc
SUN_POSTN:        19.19d {+01h 16m 46s}   +8.11d {+08d 06' 33"}
SUN_DIST:        130.48 [deg]   Sun_angle= -8.8 [hr] (East of Sun)
MOON_POSTN:       58.48d {+03h 53m 56s}  +15.39d {+15d 23' 40"}
MOON_DIST:        91.43 [deg]
MOON_ILLUM:      11 [%]
GAL_COORDS:      235.88, 43.29 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      151.51, -8.01 [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 = 249.59,-18.80 [deg].  
COMMENTS:        The 3rd packet (of 3) was missing in the lightcurve data stream.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 10 Apr 16 05:28:02 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     682269,   Seg_Num: 0
POINT_RA:        150.667d {+10h 02m 40s} (J2000)
POINT_DEC:        +3.453d {+03d 27' 09"} (J2000)
POINT_ROLL:      283.667d
IMG_START_DATE:  17488 TJD;   101 DOY;   16/04/10
IMG_START_TIME:  18679.14 SOD {05:11:19.14} UT,   91.1 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.324
N_STARS:         32
X_OFFSET:        352 [pixels]
Y_OFFSET:        560 [pixels]
X_MAX:           1311 [pixels]
Y_MAX:           1519 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    6
SL_URL:          sw00682269000msufc0091.fits
SUN_POSTN:        19.20d {+01h 16m 48s}   +8.11d {+08d 06' 45"}
SUN_DIST:        130.46 [deg]   Sun_angle= -8.8 [hr] (East of Sun)
MOON_POSTN:       58.62d {+03h 54m 29s}  +15.42d {+15d 25' 03"}
MOON_DIST:        91.28 [deg]
MOON_ILLUM:      11 [%]
GAL_COORDS:      235.86, 43.29 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      151.49, -8.00 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 10 Apr 16 05:28:21 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     682269,   Seg_Num: 0
POINT_RA:        150.667d {+10h 02m 40s} (J2000)
POINT_DEC:        +3.453d {+03d 27' 09"} (J2000)
POINT_ROLL:      283.667d
IMG_START_DATE:  17488 TJD;   101 DOY;   16/04/10
IMG_START_TIME:  18679.14 SOD {05:11:19.14} UT,   91.1 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.324
N_STARS:         32
X_OFFSET:        352 [pixels]
Y_OFFSET:        560 [pixels]
X_MAX:           1311 [pixels]
Y_MAX:           1519 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    6
SL_URL:          sw00682269000msufc0091.fits
SUN_POSTN:        19.20d {+01h 16m 48s}   +8.11d {+08d 06' 46"}
SUN_DIST:        130.46 [deg]   Sun_angle= -8.8 [hr] (East of Sun)
MOON_POSTN:       58.62d {+03h 54m 29s}  +15.42d {+15d 25' 05"}
MOON_DIST:        91.27 [deg]
MOON_ILLUM:      11 [%]
GAL_COORDS:      235.86, 43.29 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      151.49, -8.00 [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 10 Apr 16 05:29:26 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     682269,   Seg_Num: 0
POINT_RA:        150.667d {+10h 02m 40s} (J2000)
POINT_DEC:        +3.453d {+03d 27' 09"} (J2000)
ROLL:            283.667d
IMG_START_DATE:  17488 TJD;   101 DOY;   16/04/10
IMG_START_TIME:  18679.14 SOD {05:11:19.14} UT,   91.1 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     481957895
X_OFFSET:        813 [pixels]
Y_OFFSET:        1083 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       973
Y_GRB_POS:       1243
BINNING_INDEX:   1
IM_URL:          sw00682269000msuni0108.fits
SUN_POSTN:        19.20d {+01h 16m 48s}   +8.11d {+08d 06' 47"}
SUN_DIST:        130.46 [deg]   Sun_angle= -8.8 [hr] (East of Sun)
MOON_POSTN:       58.63d {+03h 54m 32s}  +15.42d {+15d 25' 12"}
MOON_DIST:        91.26 [deg]
MOON_ILLUM:      11 [%]
GAL_COORDS:      235.86, 43.29 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      151.49, -8.00 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 10 Apr 16 05:29:36 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     682269,   Seg_Num: 0
POINT_RA:        150.668d {+10h 02m 40s} (J2000)
POINT_DEC:        +3.455d {+03d 27' 19"} (J2000)
POINT_ROLL:      283.669d
IMG_START_DATE:  17488 TJD;   101 DOY;   16/04/10
IMG_START_TIME:  18892.46 SOD {05:14:52.46} UT,   304.4 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.234
N_STARS:         21
X_OFFSET:        493 [pixels]
Y_OFFSET:        763 [pixels]
X_MAX:           1452 [pixels]
Y_MAX:           1722 [pixels]
DET_THRESH:      5
PHOTO_THRESH:    2
SL_URL:          sw00682269000msufc0304.fits
SUN_POSTN:        19.20d {+01h 16m 48s}   +8.11d {+08d 06' 47"}
SUN_DIST:        130.46 [deg]   Sun_angle= -8.8 [hr] (East of Sun)
MOON_POSTN:       58.64d {+03h 54m 32s}  +15.42d {+15d 25' 13"}
MOON_DIST:        91.26 [deg]
MOON_ILLUM:      11 [%]
GAL_COORDS:      235.86, 43.29 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      151.49, -8.00 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 10 Apr 16 05:29:49 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     682269,   Seg_Num: 0
POINT_RA:        150.667d {+10h 02m 40s} (J2000)
POINT_DEC:        +3.453d {+03d 27' 09"} (J2000)
ROLL:            283.667d
IMG_START_DATE:  17488 TJD;   101 DOY;   16/04/10
IMG_START_TIME:  18679.14 SOD {05:11:19.14} UT,   91.1 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     481957895
X_OFFSET:        813 [pixels]
Y_OFFSET:        1083 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       973
Y_GRB_POS:       1243
BINNING_INDEX:   1
IM_URL:          sw00682269000msuni0108.fits
SUN_POSTN:        19.20d {+01h 16m 48s}   +8.11d {+08d 06' 47"}
SUN_DIST:        130.46 [deg]   Sun_angle= -8.8 [hr] (East of Sun)
MOON_POSTN:       58.64d {+03h 54m 33s}  +15.42d {+15d 25' 14"}
MOON_DIST:        91.26 [deg]
MOON_ILLUM:      11 [%]
GAL_COORDS:      235.86, 43.29 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      151.49, -8.00 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 10 Apr 16 05:29:51 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     682269,   Seg_Num: 0
POINT_RA:        150.668d {+10h 02m 40s} (J2000)
POINT_DEC:        +3.455d {+03d 27' 19"} (J2000)
POINT_ROLL:      283.669d
IMG_START_DATE:  17488 TJD;   101 DOY;   16/04/10
IMG_START_TIME:  18892.46 SOD {05:14:52.46} UT,   304.4 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.234
N_STARS:         21
X_OFFSET:        493 [pixels]
Y_OFFSET:        763 [pixels]
X_MAX:           1452 [pixels]
Y_MAX:           1722 [pixels]
DET_THRESH:      5
PHOTO_THRESH:    2
SL_URL:          sw00682269000msufc0304.fits
SUN_POSTN:        19.20d {+01h 16m 48s}   +8.11d {+08d 06' 47"}
SUN_DIST:        130.46 [deg]   Sun_angle= -8.8 [hr] (East of Sun)
MOON_POSTN:       58.64d {+03h 54m 33s}  +15.42d {+15d 25' 14"}
MOON_DIST:        91.26 [deg]
MOON_ILLUM:      11 [%]
GAL_COORDS:      235.86, 43.29 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      151.49, -8.00 [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 10 Apr 16 05:30:53 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     682269,   Seg_Num: 0
POINT_RA:        150.668d {+10h 02m 40s} (J2000)
POINT_DEC:        +3.455d {+03d 27' 19"} (J2000)
ROLL:            283.669d
IMG_START_DATE:  17488 TJD;   101 DOY;   16/04/10
IMG_START_TIME:  18892.46 SOD {05:14:52.46} UT,   304.4 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     481958108
X_OFFSET:        813 [pixels]
Y_OFFSET:        1083 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       973
Y_GRB_POS:       1243
BINNING_INDEX:   1
IM_URL:          sw00682269000msuni0321.fits
SUN_POSTN:        19.20d {+01h 16m 48s}   +8.11d {+08d 06' 48"}
SUN_DIST:        130.45 [deg]   Sun_angle= -8.8 [hr] (East of Sun)
MOON_POSTN:       58.65d {+03h 54m 36s}  +15.42d {+15d 25' 21"}
MOON_DIST:        91.25 [deg]
MOON_ILLUM:      11 [%]
GAL_COORDS:      235.86, 43.29 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      151.49, -8.00 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 10 Apr 16 05:31:10 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     682269,   Seg_Num: 0
POINT_RA:        150.668d {+10h 02m 40s} (J2000)
POINT_DEC:        +3.455d {+03d 27' 19"} (J2000)
ROLL:            283.669d
IMG_START_DATE:  17488 TJD;   101 DOY;   16/04/10
IMG_START_TIME:  18892.46 SOD {05:14:52.46} UT,   304.4 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     481958108
X_OFFSET:        813 [pixels]
Y_OFFSET:        1083 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       973
Y_GRB_POS:       1243
BINNING_INDEX:   1
IM_URL:          sw00682269000msuni0321.fits
SUN_POSTN:        19.20d {+01h 16m 48s}   +8.11d {+08d 06' 48"}
SUN_DIST:        130.45 [deg]   Sun_angle= -8.8 [hr] (East of Sun)
MOON_POSTN:       58.65d {+03h 54m 36s}  +15.42d {+15d 25' 23"}
MOON_DIST:        91.25 [deg]
MOON_ILLUM:      11 [%]
GAL_COORDS:      235.86, 43.29 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      151.49, -8.00 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 10 Apr 16 05:32:37 UT
NOTICE_TYPE:     Swift-UVOT Position
TRIGGER_NUM:     682269,   Seg_Num: 0
GRB_RA:          150.6849d {+10h 02m 44.37s} (J2000),
                 150.8961d {+10h 03m 35.05s} (current),
                 150.0357d {+10h 00m 08.57s} (1950)
GRB_DEC:          +3.4785d {+03d 28' 42.5"} (J2000),
                  +3.3994d {+03d 23' 57.9"} (current),
                  +3.7205d {+03d 43' 13.7"} (1950)
GRB_ERROR:       0.8 [arcsec radius, statistical only]
GRB_MAG:         19.48 +/- 0.16 [mag]
FILTER:          10, White
IMG_START_DATE:  17488 TJD;   101 DOY;   16/04/10
IMG_START_TIME:  18677.00 SOD {05:11:17.00} UT,   89.0 [sec] since BAT Trigger Time
SUN_POSTN:        19.20d {+01h 16m 48s}   +8.11d {+08d 06' 49"}
SUN_DIST:        130.46 [deg]   Sun_angle= -8.8 [hr] (East of Sun)
MOON_POSTN:       58.67d {+03h 54m 40s}  +15.43d {+15d 25' 32"}
MOON_DIST:        91.24 [deg]
MOON_ILLUM:      11 [%]
GAL_COORDS:      235.85, 43.32 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      151.50, -7.97 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT UVOT Position Notice.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        The UVOT position is 2.9 arcsec from the XRT position.  
COMMENTS:        Result based on Genie data.  
COMMENTS:        Notice generated automatically.

GCN Circular #19271
S. L. Gibson (U Leicester), D. Malesani (DARK/NBI), K. L. Page (U Leicester), D. M. Palmer (LANL) and M. H. Siegel (PSU) report on behalf of the Swift Team:
At 05:09:48 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 160410A (trigger=682269). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 150.681, +3.443 which is
```
   RA(J2000) = 10h 02m 43s
   Dec(J2000) = +03d 26' 37"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a single-peaked structure with a duration of about 2 sec. The peak count rate was ~9000 counts/sec (15-350 keV), at ~0 sec after the trigger.
The XRT began observing the field at 05:11:10.9 UT, 82.9 seconds after the BAT trigger. XRT found a bright, uncatalogued X-ray source located at RA, Dec 150.6857, 3.4782 which is equivalent to:
```
   RA(J2000)  = +10h 02m 44.57s
   Dec(J2000) = +03d 28' 41.5"
```
with an uncertainty of 5.6 arcseconds (radius, 90% containment). This location is 127 arcseconds from the BAT onboard position, within the BAT error circle. No event data are yet available to determine the column density using X-ray spectroscopy.
The initial flux in the 2.5 s image was 1.04e-09 erg cm^-2 s^-1 (0.2-10 keV).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 91 seconds after the BAT trigger. There is a candidate afterglow in the rapidly available 2.7'x2.7' sub-image at
```
 RA(J2000)  =	10:02:44.39 = 150.68494
 DEC(J2000) = +03:28:42.9  =	3.47858
```
with a 90%-confidence error radius of about 0.78 arc sec. This position is 3.0 arc sec. from the center of the XRT error circle. The estimated magnitude is 19.49 with a 1-sigma error of about 0.16. No correction has been made for the expected extinction corresponding to E(B-V) of 0.02.
Burst Advocate for this burst is S. L. Gibson (slg44 AT le.ac.uk). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/too.html.)
GCN Circular #19272
R Yates (MPE Garching) , T Kruehler (MPE Garching), J Greiner (MPE Garching) report on behalf of the GROND team:
We observed the field of GRB 160410A (Swift trigger 682269; Gibson et al., GCN #19271) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2 m MPG telescope at ESO La Silla Observatory (Chile).
Observations started at 05:42 UT on 10-04-2016, 32mins after the GRB trigger. They were performed at an average seeing of 1.8" and at an average airmass of 2.7.
We found a single point source within the 0.7" Swift-UVOT error circle reported by Gibson et al. (GCN #19271) at
```
RA (J2000.0) = 10h 02m 44.37s
DEC (J2000.0) = +03d 28' 42.4"
```
with an uncertainty of 0.5" in each coordinate.
Based on the first 4 min of total exposures in g'r'i'z' and JHK, we estimate preliminary magnitudes (all in AB system) of
```
g' = 20.6 +/- 0.1 mag,
r' = 20.5 +/- 0.1 mag,
i' = 20.7 +/- 0.1 mag,
z' = 20.5 +/- 0.2 mag,
J > 20.0 mag,
H > 19.6 mag, and
K > 18.0 mag.
```
Given magnitudes are calibrated against SDSS/2MASS zeropoints as well as 2MASS field stars and are not corrected for the expected Galactic foreground extinction corresponding to a reddening of E_(B-V)=0.0180 mag in the direction of the burst (Schlafly & Finkbeiner 2011).
GCN Circular #19273
A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team.
Using 380 s of XRT Photon Counting mode data and 2 UVOT images for GRB 160410A, 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 = 150.68560, +3.47856 which is equivalent to:
```
RA (J2000): 10h 02m 44.54s
Dec (J2000): +03d 28' 42.8"
```
with an uncertainty of 3.0 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 #19274
J. Selsing (DARK/NBI), P.M. Vreeswijk (WIS), J. Japelj (INAF/OATs), V. D'Elia (ASI/ASDC and INAF/Roma), A. de Ugarte Postigo (IAA/CSIC and DARK/NBI), G. Pugliese (API/UvA), D. Xu (NAOC/CAS), D. Malesani (DARK/NBI), T. Kruehler (MPE), J.P.U. Fynbo (DARK/NBI), report on behalf of a larger collaboration:
We observed the optical afterglow of GRB 160410A (Gibson et al., GCN 19271; Yates et al., GCN 19272) with the ESO Very Large Telescope UT2 (Kueyen) equipped with X-shooter. Observations were triggered robotically in "rapid response mode" (RRM). Our spectroscopic integration started 8.4 min after the GRB and 3x600 s spectra were collected covering the wavelength range 3000-24,500 AA, until the target became too low on the horizon.
The optical afterglow is detected in our acquisition image (7.7 min after the GRB) with a magnitude r = 20.29 +- 0.06 (AB), calibrated against two nearby SDSS stars.
Our spectra reveal continuum over the entire spectral range redward of ~3400 AA, which constrains the redshift to be z < 1.8. Besides, a number of weak absorption features are detected, which we interpret as due to Fe II and Al II at a redshift z = 1.717. At this redshift, the Mg II 2796,2803 doublet lies into a region of strong telluric absorption (the A band) and is not detected. Two intervening C IV absorbers are also observed at z = 1.444 and z = 1.581.
We acknowledge excellent and prompt support from the ESO staff at Paranal, in particular Annalisa De Cia and Cedric Ledoux.
GCN Circular #19275
F. E. Marshall (NASA/GSFC) and S. L. Gibson (U. Leicester) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 160410A 91 s after the BAT trigger (Gibson et al., GCN Circ. 19271). A source consistent with the initial UVOT position (Gibson et al. GCN Circ. 19271), the enhanced XRT position (Beardmore et al. GCN Circ. 19273), and the GROND position (Yates et al. GCN Circ. 19272) is detected in the initial UVOT exposures.
The preliminary UVOT position is:
```
    RA  (J2000) =  10:02:44.37 = 150.68488 (deg.)
    Dec (J2000) = +03:28:42.7  =   3.47853 (deg.)
```
with an estimated uncertainty of 0.49 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
white               91          241          147         19.46 +/- 0.10
v                 4867         6503          393        >19.7
b                 4251         5887          393        >20.2
u                  304        12411          866         20.50 +/- 0.20
w1                5277        11801         1082        >20.3
m2                5072        10893         1082        >20.8
w2                4662         6298          393        >20.5
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.02 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #19276
T. Sakamoto (AGU), S. D. Barthelmy (GSFC), J. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), S. L. Gibson (U Leicester), H. A. Krimm (GSFC/USRA), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), J. P. Norris (BSU), D. M. Palmer (LANL), M. Stamatikos (OSU), T. N. Ukwatta (LANL) (i.e. the Swift-BAT team):
Using the data set from T-60 to T+243 sec from the recent telemetry downlinks, we report further analysis of BAT short GRB 160410A (trigger #682269) (Gibson, et al., GCN Circ. 19271). The BAT ground-calculated position is RA, Dec = 150.695, 3.461 deg, which is
```
   RA(J2000)  =  10h 02m 46.9s 
   Dec(J2000) = +03d 27' 40.3" 
```
with an uncertainty of 1.5 arcmin, (radius, sys+stat, 90% containment). The partial coding was 37%.
The mask-weighted light curve shows an initial spike starting at ~T-0.2 s peaking at ~T+0.1 s with a decay out to ~T+2.5 s, then a greatly reduced flux level portion out to ~T+9 s. T90 (15-350 keV) is 8.2 +- 1.6 s (estimated error including systematics).
The time-averaged spectrum from T+0.04 to T+9.60 s is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 0.93 +- 0.17. The fluence in the 15-150 keV band is 7.8 +- 0.8 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T+0.04 sec in the 15-150 keV band is 3.5 +- 0.3 ph/cm2/s. 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/682269/BA/
Using a 4-ms binned light curve for this bright burst, the lag of the initial pulse (~T0 to ~T0+2 s) for the 100-350 keV to 25-50 keV bands is -3 (+/-7) ms (with 1-sigma error) and for the 50-100 kev to 15-25 keV bands the lag is 8 (+/-14) ms. These values are consistant with zero, thus confirming that this is a short GRB. There is extended emission out to ~T+10 sec at ~0.038 counts/det/sec then dropping to ~0.0055 counts/det/sec out to ~T+92 sec.
GCN Circular #19277
A. Trotter, D. Reichart, J. Haislip, J. Moore, N. Frank, M. Maples, E. Johnson, R. Joyner, J. Martin, C. Salemi, J. A. Crain, K. Ivarsen, A. LaCluyze, and M. Nysewander report:
Skynet observed the Swift BAT/XRT localization of GRB 160410A (Gibson et al., GCN 19271, Swift trigger=682269) with with one 16" telescope (P5), and two 24" telescopes (P1, P8) of the PROMPT array at CTIO, Chile. Starting at 2016-04-10 05:10:36 UT and continuing until 05:54 UT (t=48s-45m post-trigger), Skynet took a total of 93 exposures ranging from 5-160s in the I band (P1, P5) and the B band (P8).
We detect a fading optical afterglow in individual and stacked I-band images at the position first reported by Gibson et al. (GCN 19271) and Yates et al. (GCN 19272), with I~17.3 at t=1m and I~19.4 at t=6m.
A preliminary light curve is at: http://www.skynet.unc.edu/grb/grb160410a.png
Magnitudes are in the Vega System, calibrated to 4 APASS DR9 stars in the field. Magnitudes have not been corrected for line-of-sight Milky Way dust extinction, with expected E(B-V)=0.02 (Schlafly & Finkbeiner 2011).
No further Skynet observations are scheduled.
GCN Circular #19278
Yi Cao, S. R. Kulkarni, Lin Yan, Vikram Ravi, H. K. Vedantham, Mansi M. Kasliwal (Caltech)
We obtained a spectrum of the optical afterglow of GRB 160410A with the Low Resolution Imaging Spectrometer (LRIS) on the Keck-I telescope at Mauna Kea, following the Swift UVOT localization (GCN 19271). Our spectroscopic integration started 84.25 minutes after the Swift trigger at airmass 1.05 and one 600s spectrum was obtained covering 3100-10200 Angstrom.
Our spectrum reveals a blue continuum superposed by a strong and broad absorption around centered around 3300 Angstrom as well as a number of weak and narrow absorption features. Upon obtaining the data we determined a redshift of 1.72 based primarily on the broad damped Lyman alpha and threshold detection of narrow Si II, O I, C IV and Mg II absorption lines. Our redshift is consistent to that derived from the VLT/X-shooter spectra (GCN 19274).
GCN Circular #19280
C.-J. Wang, J. Mao, and J.-M. Bai (YNAO) report:
We observed the field of GRB 160410A (Gibson et al., GCN 19271) with the 2.4-meter optical telescope at Gao-Mei-Gu (GMG) station of Yunnan Observatories. Observations began from 12:40:10 UT, Apr. 10th, 2016, about 7.5 hours after the trigger. We marginally detected one faint source in the image at the afterglow position (Yates et al. GCN 19272), and the magnitude was estimated as R~22.1+/- 0.2 mag.
GCN Circular #19282
B. Sbarufatti (INAF-OAB/PSU), K.L. Page (U. Leicester), C. Pagani (U. Leicester), A.P. Beardmore (U. Leicester), A. Maselli (INAF-IASFPA), A. Melandri (INAF-OAB), P. D'Avanzo (INAF-OAB), D.N. Burrows (PSU), T.G.R. Roegiers (PSU) and S.L. Gibson report on behalf of the Swift-XRT team:
We have analysed 5.7 ks of XRT data for GRB 160410A (Gibson et al. GCN Circ. 19271), from 72 s to 67.9 ks after the BAT trigger. The data comprise 241 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. 19273).
The light curve can be modelled with a power-law decay with a decay index of alpha=1.54 (+/-0.11).
A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 1.28 (+0.12, -0.06). The best-fitting absorption column is consistent with the Galactic value of 1.8 x 10^20 cm^-2 (Willingale et al. 2013). The PC mode spectrum has a photon index of 1.9 (+0.8, -0.5) and a best-fitting absorption column of 2 (+34, -2) x 10^21 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.5 x 10^-11 (3.8 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Galactic foreground: 1.8 x 10^20 cm^-2
Intrinsic column:    2 (+34, -2) x 10^21 cm^-2 at z=1.717
Photon index:	     1.9 (+0.8, -0.5)
```
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00682269.
This circular is an official product of the Swift-XRT team.
GCN Circular #19285
Y. Muraki, Y.Ono, T.Fujiwara, T. Yoshii, Y. Saito, Y. Tachibana, H. Ohuchi, Y. Yano, S.Harita, Y. Yatsu, and N. Kawai (Tokyo Tech) report on behalf of the MITSuME collaboration:
We searched for the optical counterpart of GRB 160410A (S. L. Gibson et al., GCN Circular #19271) with the optical three color (g', Rc, and Ic) CCD cameras attached to the MITSuME 50 cm telescope of Akeno Observatory, Yamanashi, Japan.
The observation started on 2016-04-10 12:06:25 UT (~7.1 h after the burst). We did not find any new point source within XRT circle in all three bands.
We obtained following limits for the magnitudes.
```
T0+[hour]    MID-UT     T-EXP[sec]      g'         Rc          Ic
----------------------------------------------------------------------------
   7.1        13:24:39         4694       >19.8     >19.7    >19.1
----------------------------------------------------------------------------
T0+ : Elapsed time after the burst 
T-EXP: Total Exposure time 
We used GSC2.3 catalog for flux calibration.
```
GCN Circular #19287
Klotz A., Turpin D., Atteia J.L. (CNRS-OMP-IRAP), Boer, M., Laugier, R. (CNRS-ARTEMIS), Gendre B. (UVI - Etelman Obs.) report:
We imaged the field of GRB 160410A detected by SWIFT (trigger 682269) with the TAROT robotic telescope (D=25cm) located at the European Southern Observatory, La Silla observatory, Chile.
The observations started 28s after the GRB trigger (16.8s after the notice). Due to a technical problem only the first exposure of 60s was taken.
The image is trailed (see the description in Klotz et al., 2006, A&A 451, L39). We detect the UVOT optical transcient discovered by Gibson et al. (GCNC 19271).
At the beginning of the trail (t0+28s) the magnitude is R=18.4 (+/-0.3) and decays to R=18.7 (limiting magnitude) at t0+46s. Then the OT became too faint to be detected between t0+46 and t0+88s (Rlim=18.7).
Magnitudes were estimated with the nearby NOMAD1 stars and are not corrected for galactic dust extinction.
GCN Circular #19288
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 short GRB 160410A (Swift/BAT observation: Gibson et al., GCN 19271; Sakamoto et al., GCN 19276) triggered Konus-Wind at T0=3D18592.644 s UT (05:09:52.644).
The light curve shows a short, hard pulse with a total duration is ~2 s. The emission is seen up to ~4 MeV.
As observed by Konus-Wind, the burst had a fluence of (1.20 =B1 0.3)x10^-5 erg/cm2 and a 16-ms peak energy flux, measured from T0-0.016, of (2.8 =B1 0.4)x10^-5 erg/cm2 (both in the 20 keV - 10 MeV energy range).
The spectrum of the burst (measured from T0 to T0+8.448 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 -0.71(-0.20,+0.26), and the peak energy Ep =3D 1416(-356,+528) keV, chi2 =3D 92/97 dof. Fitting this spectrum with the GRB (Band) function yields the same alpha and Ep with only an upper limit on beta of -2.1, chi2 =3D 92/96 dof.
The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB160410_T18592/
Assuming the redshift z=3D1.717 (Selsing et al., GCN 19274) and a standard cosmology model with H_0 =3D 70 km/s/Mpc, Omega_M =3D 0.27, and Omega_Lambda =3D 0.73, we estimate the following rest-frame parameters: the isotropic energy release E_iso is ~4.0x10^52 erg, the peak luminosity L_iso is ~7.5x10^52 erg/s, and the rest-frame peak energy of the time-integrated spectrum, Ep,i, is ~4660 keV.
All the quoted errors are estimated at the 1 sigma confidence level. All the presented results are preliminary.
GCN Circular #19290
W. Fong and P. Milne (University of Arizona) report:
"We observed the field of the short-duration GRB 160410A (Gibson et al., GCN 19271) with the Wide Field Camera (WFCAM) mounted on the 3.8-m United Kingdom Infrared Telescope (UKIRT) on Mauna Kea beginning on 2016 Apr 11.215 UT (25.3 hr post-burst). We obtained observations in the J- and K-bands in 0.7" seeing. Using the quick-look pipeline ORAC-DR, we do not detect any near-IR source in or around the positions of the X-ray (Beardmore et al., GCN 19273) or optical (Yates et al., GCN 19272; Selsing et al., GCN 19274; Marshall et al., GCN 19275; Trotter et al., GCN 19277) afterglows. Calibrated to 2MASS, we therefore place 3-sigma limits of J(AB)>20.0 mag and K(AB)>19.5 mag on the near-IR afterglow of GRB 160410A at 25.3 hr post-burst. We note that this analysis is preliminary and a final reduction of the images are expected to be ~1.5 mag deeper.
We thank Sam Benigni for executing these observations. In addition, we thank Watson Varricatt, Tom Kerr, and Richard Green for their assistance in re-establishing a system for a target-of-opportunity program at UKIRT."
GCN Circular #19295
D. Malesani (DARK/NBI) and C. Kirkpatrick (Univ. Helsinki) report on behalf of a larger collaboration:
We observed the optical counterpart of GRB 160410A (Gibson et al., GCN 19271) with the Nordic Optical Telescope (NOT) equipped with ALFOSC. Observations started on April 10.92 UT and consisted of 3x900 s exposures in the SDSS r band.
The optical counterpart of GRB 160410A is well detected with a magnitude r = 24.15 +- 0.09 (AB), calibrated against nearby SDSS stars, at a mean epoch April 10.936 UT (17.3 hr after the GRB). The source looks pointlike in our images (with a seeing of 0.65").
GCN Circular #19300
D. Malesani (DARK/NBI), D. Xu (NAOC/CAS), T. Kuutma (NOT and Tartu Obs.), report on behalf of a larger collaboration:
We observed again the optical counterpart of GRB 160410A (Gibson et al., GCN 19271) with the Nordic Optical Telescope (NOT) equipped with ALFOSC. Observations started on April 11.87 UT and consisted of 4x900 s exposures in the SDSS r band.
At a mid time of 40.37 hr after the GRB, we do not detect any longer the optical afterglow down to a 3-sigma limiting magnitude of r > 25 (AB), calibrated against nearby SDSS stars. The corresponding decay index (F propto t^-alpha) between our two NOT observations (Malesani & Kirkpatrick, GCN 19925) is constrained to be alpha > 0.9. The object closest to the GRB position (with r ~ 24) lies 4.7" away, so we cannot single out any obvious host galaxy candidate to the GRB, down to the quoted limiting magnitude.
GCN Circular #19306
I.A. Smith (Rice U.), N.R. Tanvir (U. of Leicester), and Y. Urata (NCU) report:
We observed the location of the short GRB 160410A (Gibson et al., GCN Circ. 19271) using the SCUBA-2 sub-millimeter continuum camera on the James Clerk Maxwell Telescope. The observation started at 05:54 UT on 2016-04-10, corresponding to 45 minutes after the burst trigger. Exposures totaling 2.0 hours were made in good weather conditions. No source was detected, with the RMS background noise being 1.3 mJy/beam at 850 microns and 12.5 mJy/beam at 450 microns.
We thank Callie Matulonis, Lianghao Lin, and Iain Coulson for the prompt support of these observations that were taken under project M16AP005.
GCN Circular #19309
I. Juvan (IWF Graz), M. Bluemcke, D. Baak (University of Jena), S. Kunz, S. Schmidl, S. Klose, D. A. Kann, A. Nicuesa Guelbenzu, and F. Ludwig (TLS Tautenburg) report:
We observed the field of GRB 160410A (Gibson et al., GCN 19271) with the Tautenburg 1.34-m Schmidt telescope at a mid-time of about 14.6 hrs after the GRB trigger, at a mean airmass of 1.5. We obtained 4 x 300s and 1 x 600s exposures in the Ic band.
We do not detect the optical afterglow reported by Gibson et al. (GCN 19271), Yates et al. (GCN 19272), Selsing et al. (GCN 19274), Trotter et al. (GCN 19277), Wang et al. (GCN 19280) and Klotz et al (GCN 19287). We estimate a preliminary upper limit of Ic > 21.1 mag (AB magnitude system), calibrated against SDSS field stars.
These observations were performed as part of the Tautenburg Observing School at the Thueringer Landessternwarte.
GCN Circular #19311
B. E. Cobb (GWU) reports:
Using the ANDICAM instrument on the 1.3m telescope at CTIO, we obtained optical/IR imaging of the error region of GRB 160410A (GCN 19271, Gibson et al.) with a mid-exposure time of 20.7 hours post-burst (2016-04-11 01:49 UT). Total summed exposure times amounted to 36 minutes in I and 30 minutes in J.
No source is detected at the position of the optical afterglow (e.g. GCN 19271, Gibson et al.; GCN 19272, Yates et al.) to approximate limiting magnitudes of I > 20.3 and J > 17.5. Magnitudes are calibrated using USNO-B1.0 stars in I, and 2MASS stars in J.
Agüí Fernández 2023
(one of the rare occasions of an) afterglow spectrum of short GRB

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