Gamma-ray Burst 160624A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

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Results of Observations

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 24 Jun 16 11:27:25 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     701288,   Seg_Num: 0
GRB_RA:          330.203d {+22h 00m 49s} (J2000),
                 330.388d {+22h 01m 33s} (current),
                 329.641d {+21h 58m 34s} (1950)
GRB_DEC:         +29.634d {+29d 38' 02"} (J2000),
                 +29.714d {+29d 42' 49"} (current),
                 +29.393d {+29d 23' 35"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       1704 [cnts]    Image_Peak=109 [image_cnts]
TRIGGER_DUR:     0.256 [sec] 
TRIGGER_INDEX:   126     E_range: 50-350 keV
BKG_INTEN:       23679 [cnts]
BKG_TIME:        41207.53 SOD {11:26:47.53} UT
BKG_DUR:         8 [sec]
GRB_DATE:        17563 TJD;   176 DOY;   16/06/24
GRB_TIME:        41221.29 SOD {11:27:01.29} UT
GRB_PHI:           6.43 [deg]
GRB_THETA:        17.35 [deg]
SOLN_STATUS:     0x20000003
RATE_SIGNIF:     33.73 [sigma]
IMAGE_SIGNIF:    7.25 [sigma]
MERIT_PARAMS:     +1  +0  +0  -2  +3  -3  +0  +0 +24  +0 
SUN_POSTN:        93.68d {+06h 14m 44s}  +23.39d {+23d 23' 36"}
SUN_DIST:        103.93 [deg]   Sun_angle= 8.2 [hr] (West of Sun)
MOON_POSTN:      323.28d {+21h 33m 08s}  -12.35d {-12d 21' 06"}
MOON_DIST:        42.62 [deg]
MOON_ILLUM:      83 [%]
GAL_COORDS:       84.09,-20.09 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      345.18, 38.72 [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 = 242.49,-11.62 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This BAT event is temporally(0.0<100sec) coincident with the FERMI_GBM event (trignum=488460425).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Fri 24 Jun 16 11:27:26 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      45
TRIGGER_NUM:     488460425
GRB_RA:          336.233d {+22h 24m 56s} (J2000),
                 336.430d {+22h 25m 43s} (current),
                 335.637d {+22h 22m 33s} (1950)
GRB_DEC:         +21.450d {+21d 26' 60"} (J2000),
                 +21.534d {+21d 32' 02"} (current),
                 +21.196d {+21d 11' 45"} (1950)
GRB_ERROR:       12.00 [deg radius, statistical plus systematic]
GRB_INTEN:       380 [cnts/sec]
DATA_SIGNIF:     9.20 [sigma]
INTEG_TIME:      0.256 [sec]
GRB_DATE:        17563 TJD;   176 DOY;   16/06/24
GRB_TIME:        41221.35 SOD {11:27:01.35} UT
GRB_PHI:          86.00 [deg]
GRB_THETA:        70.00 [deg]
DATA_TIME_SCALE: 0.2560 [sec]
HARD_RATIO:      0.33
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      86%  GRB
2nd_MOST_LIKELY:  10%  Cyg X-1
DETECTORS:       0,1,0, 0,1,0, 0,0,0, 0,0,0, 0,0,
SUN_POSTN:        93.68d {+06h 14m 44s}  +23.39d {+23d 23' 36"}
SUN_DIST:        104.19 [deg]   Sun_angle= 7.8 [hr] (West of Sun)
MOON_POSTN:      323.28d {+21h 33m 08s}  -12.35d {-12d 21' 06"}
MOON_DIST:        36.26 [deg]
MOON_ILLUM:      83 [%]
GAL_COORDS:       83.12,-29.87 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      346.87, 28.99 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2016/bn160624477/quicklook/glg_lc_medres34_bn160624477.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 194.33,0.83 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(0.0<100sec) coincident with the SWIFT_BAT event (trignum=701288).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Fri 24 Jun 16 11:27:38 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      57
TRIGGER_NUM:     488460425
GRB_RA:          337.170d {+22h 28m 41s} (J2000),
                 337.367d {+22h 29m 28s} (current),
                 336.571d {+22h 26m 17s} (1950)
GRB_DEC:         +21.080d {+21d 04' 48"} (J2000),
                 +21.165d {+21d 09' 53"} (current),
                 +20.824d {+20d 49' 26"} (1950)
GRB_ERROR:       4.85 [deg radius, statistical only]
DATA_SIGNIF:     9.20 [sigma]
DATA_INTERVAL:   0.256 [sec]
GRB_DATE:        17563 TJD;   176 DOY;   16/06/24
GRB_TIME:        41221.35 SOD {11:27:01.35} UT
GRB_PHI:          85.00 [deg]
GRB_THETA:        70.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4153 (Gnd S/W Version number)
SUN_POSTN:        93.68d {+06h 14m 44s}  +23.39d {+23d 23' 36"}
SUN_DIST:        103.66 [deg]   Sun_angle= 7.8 [hr] (West of Sun)
MOON_POSTN:      323.29d {+21h 33m 09s}  -12.35d {-12d 21' 05"}
MOON_DIST:        36.26 [deg]
MOON_ILLUM:      83 [%]
GAL_COORDS:       83.66,-30.69 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      347.60, 28.29 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2016/bn160624477/quicklook/glg_lc_medres34_bn160624477.gif
POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_488460425.fits
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        The LC_URL file will not be created/available until ~15 min after the trigger.  
COMMENTS:        The POS_MAP_URL file will not be created/available until ~1.5 min after the notice.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(0.0<100sec) coincident with the SWIFT_BAT event (trignum=701288).

GCN NOTICE

TITLE:          GCN/INTEGRAL NOTICE
NOTICE_DATE:    Fri 24 Jun 16 11:27:45 UT
NOTICE_TYPE:    INTEGRAL SPI ACS Trigger
TRIGGER_NUM:    7492,   Sub_Num: 0
GRB_INTEN:      9.03 [sigma]   
GRB_TIME:       41219.63 SOD {11:26:59.63} UT
GRB_DATE:       17563 TJD;   176 DOY;   16/06/24
COMMENTS:       INTEGRAL SPI_ACS GRB Trigger.
COMMENTS:       Time_Scale=2.0000 and Time_Error=1.0000.
COMMENTS:
COMMENTS:       NOTE: This SPIACS event is temporally(2.0<100sec) coincident with the FERMI_GBM event (trignum=488460425).
COMMENTS:
COMMENTS:       The SPIACS lightcurve can be found at:
COMMENTS:       ftp://isdcarc.unige.ch/arc/FTP/ibas/spiacs/2016-06/2016-06-24T11-26-59.5648-32412-60304-0.lc

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 24 Jun 16 11:28:27 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     701288,   Seg_Num: 0
POINT_RA:        330.196d {+22h 00m 47s} (J2000)
POINT_DEC:       +29.631d {+29d 37' 50"} (J2000)
IMG_START_DATE:  17563 TJD;   176 DOY;   16/06/24
IMG_START_TIME:  41295.02 SOD {11:28:15.02} UT,   73.7 [sec] since BAT Trigger Time
COUNTS:          13    Min_needed= 20
STD_DEV:         0.00   Max_StdDev_for_Good=28.44 [arcsec]
PH2_ITER:        1    Max_iter_allowed= 4
ERROR_CODE:      1
COMMENTS:        SWIFT-XRT Nack Position.  
COMMENTS:        No source found in the image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 24 Jun 16 11:31:06 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     701288,   Seg_Num: 0
GRB_RA:          330.203d {+22h 00m 49s} (J2000),
                 330.388d {+22h 01m 33s} (current),
                 329.641d {+21h 58m 34s} (1950)
GRB_DEC:         +29.634d {+29d 38' 02"} (J2000),
                 +29.714d {+29d 42' 49"} (current),
                 +29.393d {+29d 23' 35"} (1950)
GRB_DATE:        17563 TJD;   176 DOY;   16/06/24
GRB_TIME:        41221.29 SOD {11:27:01.29} UT
TRIGGER_INDEX:   126
GRB_PHI:           6.43 [deg]
GRB_THETA:        17.35 [deg]
DELTA_TIME:      64.00 [sec]
TRIGGER_DUR:     0.256 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     33.73 [sigma]
IMAGE_SIGNIF:    7.25 [sigma]
LC_URL:          sw00701288000msb.lc
SUN_POSTN:        93.69d {+06h 14m 44s}  +23.39d {+23d 23' 36"}
SUN_DIST:        103.93 [deg]   Sun_angle= 8.2 [hr] (West of Sun)
MOON_POSTN:      323.32d {+21h 33m 16s}  -12.34d {-12d 20' 37"}
MOON_DIST:        42.61 [deg]
MOON_ILLUM:      83 [%]
GAL_COORDS:       84.09,-20.09 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      345.18, 38.72 [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 = 242.49,-11.62 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 24 Jun 16 11:31:40 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     701288,   Seg_Num: 0
POINT_RA:        330.196d {+22h 00m 47s} (J2000)
POINT_DEC:       +29.630d {+29d 37' 49"} (J2000)
POINT_ROLL:      52.125d
IMG_START_DATE:  17563 TJD;   176 DOY;   16/06/24
IMG_START_TIME:  41298.04 SOD {11:28:18.04} UT,   76.8 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.859
N_STARS:         166
X_OFFSET:        532 [pixels]
Y_OFFSET:        555 [pixels]
X_MAX:           1491 [pixels]
Y_MAX:           1514 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    6
SL_URL:          sw00701288000msufc0076.fits
SUN_POSTN:        93.69d {+06h 14m 45s}  +23.39d {+23d 23' 36"}
SUN_DIST:        103.94 [deg]   Sun_angle= 8.2 [hr] (West of Sun)
MOON_POSTN:      323.32d {+21h 33m 18s}  -12.34d {-12d 20' 32"}
MOON_DIST:        42.60 [deg]
MOON_ILLUM:      83 [%]
GAL_COORDS:       84.09,-20.09 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      345.17, 38.72 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 24 Jun 16 11:32:08 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     701288,   Seg_Num: 0
POINT_RA:        330.196d {+22h 00m 47s} (J2000)
POINT_DEC:       +29.630d {+29d 37' 49"} (J2000)
POINT_ROLL:      52.125d
IMG_START_DATE:  17563 TJD;   176 DOY;   16/06/24
IMG_START_TIME:  41298.04 SOD {11:28:18.04} UT,   76.8 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.859
N_STARS:         166
X_OFFSET:        532 [pixels]
Y_OFFSET:        555 [pixels]
X_MAX:           1491 [pixels]
Y_MAX:           1514 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    6
SL_URL:          sw00701288000msufc0076.fits
SUN_POSTN:        93.69d {+06h 14m 45s}  +23.39d {+23d 23' 36"}
SUN_DIST:        103.94 [deg]   Sun_angle= 8.2 [hr] (West of Sun)
MOON_POSTN:      323.33d {+21h 33m 19s}  -12.34d {-12d 20' 29"}
MOON_DIST:        42.60 [deg]
MOON_ILLUM:      83 [%]
GAL_COORDS:       84.09,-20.09 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      345.17, 38.72 [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:     Fri 24 Jun 16 11:33:29 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     701288,   Seg_Num: 0
GRB_RA:          330.1912d {+22h 00m 45.88s} (J2000),
                 330.3764d {+22h 01m 30.34s} (current),
                 329.6297d {+21h 58m 31.13s} (1950)
GRB_DEC:         +29.6438d {+29d 38' 37.6"} (J2000),
                 +29.7235d {+29d 43' 24.5"} (current),
                 +29.4029d {+29d 24' 10.4"} (1950)
GRB_ERROR:       3.9 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  17563 TJD;   176 DOY;   16/06/24
IMG_START_TIME:  41372.00 SOD {11:29:32.00} UT,   150.7 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        93.69d {+06h 14m 45s}  +23.39d {+23d 23' 36"}
SUN_DIST:        103.94 [deg]   Sun_angle= 8.2 [hr] (West of Sun)
MOON_POSTN:      323.34d {+21h 33m 22s}  -12.34d {-12d 20' 18"}
MOON_DIST:        42.61 [deg]
MOON_ILLUM:      83 [%]
GAL_COORDS:       84.09,-20.07 [deg] galactic lon,lat of the burst
ECL_COORDS:      345.17, 38.73 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        TAM values, flux and significance fields are not valid.  
COMMENTS:        This position was automatically generated on the ground using  
COMMENTS:        Photon Counting data telemetered via TDRSS (SPER data).  
COMMENTS:        See http://www.swift.ac.uk/sper/docs.php for details.  
COMMENTS:        The probability that this is a serendipitous source in the  
COMMENTS:        SPER window is 0.11% < P(seren) < 0.58%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 24 Jun 16 11:34:13 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     701288,   Seg_Num: 0
POINT_RA:        330.196d {+22h 00m 47s} (J2000)
POINT_DEC:       +29.630d {+29d 37' 49"} (J2000)
ROLL:            52.125d
IMG_START_DATE:  17563 TJD;   176 DOY;   16/06/24
IMG_START_TIME:  41298.04 SOD {11:28:18.04} UT,   76.8 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     488460514
X_OFFSET:        851 [pixels]
Y_OFFSET:        874 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1011
Y_GRB_POS:       1034
BINNING_INDEX:   1
IM_URL:          sw00701288000msuni0093.fits
SUN_POSTN:        93.69d {+06h 14m 45s}  +23.39d {+23d 23' 36"}
SUN_DIST:        103.94 [deg]   Sun_angle= 8.2 [hr] (West of Sun)
MOON_POSTN:      323.35d {+21h 33m 23s}  -12.34d {-12d 20' 12"}
MOON_DIST:        42.59 [deg]
MOON_ILLUM:      83 [%]
GAL_COORDS:       84.09,-20.09 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      345.17, 38.72 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        This notice was forced out after watchdog timer expiring -- most likely due to missing packet(s);  
COMMENTS:        as a consequence some of the fields may be incoorect (eg TRIGGER_NUM,RA,DEC).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 24 Jun 16 11:34:26 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     701288,   Seg_Num: 0
POINT_RA:        330.196d {+22h 00m 47s} (J2000)
POINT_DEC:       +29.630d {+29d 37' 49"} (J2000)
ROLL:            52.125d
IMG_START_DATE:  17563 TJD;   176 DOY;   16/06/24
IMG_START_TIME:  41298.04 SOD {11:28:18.04} UT,   76.8 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     488460514
X_OFFSET:        851 [pixels]
Y_OFFSET:        874 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1011
Y_GRB_POS:       1034
BINNING_INDEX:   1
IM_URL:          sw00701288000msuni0093.fits
SUN_POSTN:        93.69d {+06h 14m 45s}  +23.39d {+23d 23' 36"}
SUN_DIST:        103.94 [deg]   Sun_angle= 8.2 [hr] (West of Sun)
MOON_POSTN:      323.35d {+21h 33m 24s}  -12.34d {-12d 20' 10"}
MOON_DIST:        42.59 [deg]
MOON_ILLUM:      83 [%]
GAL_COORDS:       84.09,-20.09 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      345.17, 38.72 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.  
COMMENTS:        This notice was forced out after watchdog timer expiring -- most likely due to missing packet(s);  
COMMENTS:        as a consequence some of the fields may be incoorect (eg TRIGGER_NUM,RA,DEC).

GCN Circular #19560
A. D'Ai (INAF-IASFPA), S. D. Barthelmy (GSFC), N. Gehrels (NASA/GSFC), C. Gronwall (PSU), H. A. Krimm (CRESST/GSFC/USRA), A. Y. Lien (GSFC/UMBC), F. E. Marshall (NASA/GSFC), A. Maselli (INAF-IASFPA) and E. Troja (NASA/GSFC/UMCP) report on behalf of the Swift Team:
At 11:27:01 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 160624A (trigger=701288). Swift slewed immediately to the short burst. The BAT on-board calculated location is RA, Dec 330.203, +29.634 which is
```
   RA(J2000)  =  22h 00m 49s
   Dec(J2000) = +29d 38' 02"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a single spike structure with a duration of about 0.25 sec. The peak count rate was ~7000 counts/sec (15-350 keV), at ~0 sec after the trigger.
The XRT began observing the field at 11:28:15.0 UT, 73.7 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source located at RA, Dec 330.19123, 29.64388 which is equivalent to:
```
   RA(J2000)  = 22h 00m 45.90s
   Dec(J2000) = +29d 38' 38.0"
```
with an uncertainty of 3.9 arcseconds (radius, 90% containment). This location is 51 arcseconds from the BAT onboard position, within the BAT error circle. This position may be improved as more data are received; the latest position is available at http://www.swift.ac.uk/sper. We cannot determine whether the source is fading at the present time. No spectrum from the promptly downlinked event data is yet available to determine the column density.
UVOT took a finding chart exposure of 150 seconds with the White filter starting 76 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 0.07.
Burst Advocate for this burst is A. D'Ai (antonino.dai AT ifc.inaf.it). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/too.html.)

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 24 Jun 16 11:52:33 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     701288,   Seg_Num: 0
POINT_RA:        330.194d {+22h 00m 47s} (J2000)
POINT_DEC:       +29.633d {+29d 37' 58"} (J2000)
POINT_ROLL:      52.123d
IMG_START_DATE:  17563 TJD;   176 DOY;   16/06/24
IMG_START_TIME:  41510.43 SOD {11:31:50.43} UT,   289.1 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.590
N_STARS:         190
X_OFFSET:        292 [pixels]
Y_OFFSET:        315 [pixels]
X_MAX:           1731 [pixels]
Y_MAX:           1754 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00701288000msufc0289.fits
SUN_POSTN:        93.70d {+06h 14m 48s}  +23.39d {+23d 23' 35"}
SUN_DIST:        103.95 [deg]   Sun_angle= 8.2 [hr] (West of Sun)
MOON_POSTN:      323.52d {+21h 34m 04s}  -12.30d {-12d 17' 45"}
MOON_DIST:        42.53 [deg]
MOON_ILLUM:      83 [%]
GAL_COORDS:       84.09,-20.08 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      345.17, 38.72 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 24 Jun 16 11:52:51 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     701288,   Seg_Num: 0
POINT_RA:        330.194d {+22h 00m 47s} (J2000)
POINT_DEC:       +29.633d {+29d 37' 58"} (J2000)
POINT_ROLL:      52.123d
IMG_START_DATE:  17563 TJD;   176 DOY;   16/06/24
IMG_START_TIME:  41510.43 SOD {11:31:50.43} UT,   289.1 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.590
N_STARS:         190
X_OFFSET:        292 [pixels]
Y_OFFSET:        315 [pixels]
X_MAX:           1731 [pixels]
Y_MAX:           1754 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00701288000msufc0289.fits
SUN_POSTN:        93.70d {+06h 14m 48s}  +23.39d {+23d 23' 35"}
SUN_DIST:        103.95 [deg]   Sun_angle= 8.2 [hr] (West of Sun)
MOON_POSTN:      323.52d {+21h 34m 04s}  -12.30d {-12d 17' 43"}
MOON_DIST:        42.53 [deg]
MOON_ILLUM:      83 [%]
GAL_COORDS:       84.09,-20.08 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      345.17, 38.72 [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:     Fri 24 Jun 16 11:52:56 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     701288,   Seg_Num: 0
GRB_RA:          330.1927d {+22h 00m 46.24s} (J2000),
                 330.3779d {+22h 01m 30.70s} (current),
                 329.6312d {+21h 58m 31.49s} (1950)
GRB_DEC:         +29.6443d {+29d 38' 39.4"} (J2000),
                 +29.7240d {+29d 43' 26.3"} (current),
                 +29.4034d {+29d 24' 12.2"} (1950)
GRB_ERROR:       2.3 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  17563 TJD;   176 DOY;   16/06/24
IMG_START_TIME:  41372.00 SOD {11:29:32.00} UT,   150.7 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        93.70d {+06h 14m 48s}  +23.39d {+23d 23' 35"}
SUN_DIST:        103.95 [deg]   Sun_angle= 8.2 [hr] (West of Sun)
MOON_POSTN:      323.52d {+21h 34m 05s}  -12.30d {-12d 17' 42"}
MOON_DIST:        42.54 [deg]
MOON_ILLUM:      83 [%]
GAL_COORDS:       84.09,-20.07 [deg] galactic lon,lat of the burst
ECL_COORDS:      345.17, 38.73 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        This is an Update Notice -- the RA,Dec values herein supersede the previous XRT_POS Notice.  
COMMENTS:        TAM values, flux and significance fields are not valid.  
COMMENTS:        This position was automatically generated on the ground using  
COMMENTS:        Photon Counting data telemetered via TDRSS (SPER data).  
COMMENTS:        See http://www.swift.ac.uk/sper/docs.php for details.  
COMMENTS:        This position was enhanced using UVOT field astrometry.  
COMMENTS:        The probability that this is a serendipitous source in the  
COMMENTS:        SPER window is 0.11% < P(seren) < 0.58%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 24 Jun 16 11:53:45 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     701288,   Seg_Num: 0
POINT_RA:        330.194d {+22h 00m 47s} (J2000)
POINT_DEC:       +29.633d {+29d 37' 58"} (J2000)
ROLL:            52.123d
IMG_START_DATE:  17563 TJD;   176 DOY;   16/06/24
IMG_START_TIME:  41510.43 SOD {11:31:50.43} UT,   289.1 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     488460726
X_OFFSET:        851 [pixels]
Y_OFFSET:        874 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1011
Y_GRB_POS:       1034
BINNING_INDEX:   1
IM_URL:          sw00701288000msuni0306.fits
SUN_POSTN:        93.70d {+06h 14m 48s}  +23.39d {+23d 23' 35"}
SUN_DIST:        103.95 [deg]   Sun_angle= 8.2 [hr] (West of Sun)
MOON_POSTN:      323.53d {+21h 34m 06s}  -12.29d {-12d 17' 36"}
MOON_DIST:        42.52 [deg]
MOON_ILLUM:      83 [%]
GAL_COORDS:       84.09,-20.08 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      345.17, 38.72 [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:     Fri 24 Jun 16 11:54:11 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     701288,   Seg_Num: 0
POINT_RA:        330.194d {+22h 00m 47s} (J2000)
POINT_DEC:       +29.633d {+29d 37' 58"} (J2000)
ROLL:            52.123d
IMG_START_DATE:  17563 TJD;   176 DOY;   16/06/24
IMG_START_TIME:  41510.43 SOD {11:31:50.43} UT,   289.1 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     488460726
X_OFFSET:        851 [pixels]
Y_OFFSET:        874 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1011
Y_GRB_POS:       1034
BINNING_INDEX:   1
IM_URL:          sw00701288000msuni0306.fits
SUN_POSTN:        93.70d {+06h 14m 48s}  +23.39d {+23d 23' 35"}
SUN_DIST:        103.95 [deg]   Sun_angle= 8.2 [hr] (West of Sun)
MOON_POSTN:      323.53d {+21h 34m 07s}  -12.29d {-12d 17' 32"}
MOON_DIST:        42.52 [deg]
MOON_ILLUM:      83 [%]
GAL_COORDS:       84.09,-20.08 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      345.17, 38.72 [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 #19562
P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT team:
Using promptly downlinked XRT event data for GRB 160624A, we find an enhanced XRT position of the afterglow: RA, Dec: 330.1928, 29.6443 which is equivalent to:
```
   RA (J2000)  = 22 00 46.27
   Dec (J2000) = +29 38 39.4
```
with an uncertainty of 2.3 arcseconds (radius, 90% confidence). Analysis of the promptly available data is online at http://www.swift.ac.uk/sper/701288.
Position enhancement is is described by Goad et al. (2007, A&A, 476, 1401) and Evans et al. (2009, MNRAS, 397, 1177).
This circular is an official product of the Swift-XRT team.
GCN Circular #19565
A. Cucchiara (STScI/GSFC) and A. J. Levan (U. Warwick) report on behalf of a larger collaboration:
On June 24, 12:12:58 UT (~T+46min after the burst) we observed the field of the Swift short GRB160624A (D=E2=80=99Ai et al. GCN 19560,=20 Evans et al. GCN 19562) with the GMOS-N camera mounted on the Gemini North telescope.
In a 180s r=E2=80=99-band acquisition image a galaxy is identified=20 within the enhanced XRT error circle. The galaxy is also visible=20 in SDSS. We performed a 900s spectroscopic observation with the=20 R400 grating covering the 3800-8100 Angstrom wavelength range.
The galaxy spectrum reveals emission features of [OIII]5007, H-beta and [OII]3727 at the common redshift of z=0.483.
We also obtained deeper r=E2=80=99 band imaging with the GMOS camera: no other source is detected in the enhanced error circle down to=20 a limiting magnitude of r=E2=80=99~25.5, although we are not sensitive to possible faint point source superposed on the galaxy light.
We thank the Gemini staff for their extremely rapid response, in particular Andrew Stephens.
GCN Circular #19566
A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team.
Using 371 s of XRT Photon Counting mode data and 1 UVOT images for GRB 160624A, 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 = 330.19271, +29.64373 which is equivalent to:
```
RA (J2000): 22h 00m 46.25s
Dec (J2000): +29d 38' 37.4"
```
with an uncertainty of 1.9 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 #19569
T. N. Ukwatta (LANL), S. D. Barthelmy (GSFC), J. R. Cummings (GSFC/UMBC), A. D'Ai (INAF-IASFPA), 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) (i.e. the Swift-BAT team):
Using the data set from T-240 to T+581 sec from the recent telemetry downlink, we report further analysis of BAT GRB 160624A (trigger #701288) (D'Ai et al., GCN Circ. 19560). The BAT ground-calculated position is RA, Dec = 330.210, 29.667 deg which is
```
  RA(J2000)  =  22h 00m 50.5s
  Dec(J2000) = +29d 40' 02.4"
```
with an uncertainty of 2.6 arcmin, (radius, sys+stat, 90% containment). The partial coding was 100%.
The mask-weighted light curve shows a single pulse that starts at ~T0, peaks at ~T+0.1 s, and ends at ~T+0.3. T90 (15-350 keV) is 0.2 +- 0.1 sec (estimated error including systematics).
The time-averaged spectrum from T+0.0 to T+0.3 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 0.57 +- 0.45. The fluence in the 15-150 keV band is 4.0 +- 0.9 x 10^-8 erg/cm2. The 1-sec peak photon flux measured from T-0.29 sec in the 15-150 keV band is 0.5 +- 0.1 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/701288/BA/
GCN Circular #19570
R. Hamburg (UAH) and A. von Kienlin (MPE) report on behalf of the Fermi GBM Team:
"At 11:27:01.35 UT on 24 June 2016, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 160624A (trigger 488460425 / 160624477), which was also detected by the Swift (D'Ai et al. 2016, GCN 19560) The GBM on-ground location is consistent with the Swift position.
The angle from the Fermi LAT boresight at the GBM trigger time is 76 degrees.
The GBM light curve consists of a single peak with a duration (T90) of about 0.4 s (50-300 keV). The time-averaged spectrum from T0-0.064 s to T0+0.192 s is well fit by a power law function with an exponential high-energy cutoff. The power law index is -0.40 +/- 0.28 and the cutoff energy, parameterized as Epeak, is 841 +/- 358 keV.
The event fluence (10-1000 keV) in this time interval is (5.2 +/- 0.5)E-07 erg/cm^2. The 0.064-sec peak photon flux measured starting from T0+0.00 s in the 10-1000 keV band is 6.4 +/- 1.3 ph/s/cm^2.
The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN Circular #19571
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 151029A (D'Ai et al., GCNC 19560) 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 2016-06-24 15:22:38 UT (~3.9h after the burst). We did not find any new point source within the enhanced XRT circle (Beardmore et al., GCNC 19566) in all the three bands.
Three sigma upper limits of the OT are listed below. We used GSC2.3 catalog for flux calibration.
```
#T0+[day]  MID-UT    T-EXP[sec]   g'     Rc     Ic
-----------------------------------------------------
0.17131    15:33:41    1740.0   >20.5  >20.1  >19.3
-----------------------------------------------------
T0+ : Elapsed time after the burst [day]
T-EXP: Total Exposure time [sec]
```
GCN Circular #19573
A.P. Beardmore (U. Leicester), P.A. Evans (U. Leicester), A. Maselli (INAF-IASFPA), A. Melandri (INAF-OAB), P. D'Avanzo (INAF-OAB), B. Sbarufatti (INAF-OAB/PSU), D.N. Burrows (PSU), T.G.R. Roegiers (PSU), S.L. Gibson (U. Leicester) and A. D'Ai report on behalf of the Swift-XRT team:
We have analysed 6.2 ks of XRT data for GRB 160624A (D'Ai et al. GCN Circ. 19560), from 58 s to 45.7 ks after the BAT trigger. The data comprise 72 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. 19562).
The light curve can be modelled with a series of power-law decays. The initial decay index is alpha=0.8 (+0.4, -0.5). At T+126 s the decay steepens to an alpha of 3.0 (+1.1, -0.8) before breaking again at T+217 s to a final decay with index alpha=6.7 (+1.3, -0.7).
A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 1.73 (+0.31, -0.29). The best-fitting absorption column is 5.5 (+2.6, -2.2) x 10^21 cm^-2, in excess of the Galactic value of 9.1 x 10^20 cm^-2 (Willingale et al. 2013). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 4.6 x 10^-11 (6.5 x 10^-11) erg cm^-2 count^-1.
A summary of the WT-mode spectrum is thus:
```
Total column:	     5.5 (+2.6, -2.2) x 10^21 cm^-2
Galactic foreground: 9.1 x 10^20 cm^-2
Excess significance: 3.4 sigma
Photon index:	     1.73 (+0.31, -0.29)
```
If the light curve continues to decay with a power-law decay index of 6.7, the count rate at T+24 hours will be 3.8 x 10^-18 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 1.7 x 10^-28 (2.4 x 10^-28) erg cm^-2 s^-1.
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00701288.
This circular is an official product of the Swift-XRT team.
GCN Circular #19575
A.K.H. Kong (NTHU), M.Y. Lee, Y.-M. Lin (TFGHS), X. Hou (NTHU/YAO), C.Y. Liu (NTHU)
We observed the field of GRB 160624A (D'Ai et al. GCN #19560) with the 1m telescope at the Lulin Observatory in Taiwan. We obtained a 600-s image with the SDSS r-band filter on 2016 June 24, 17:32 UT (~ 6 hours after the burst). Apart from the possible host galaxy that is also seen in SDSS (Cucchiara et al. GCN #19565), no new point source was detected at the enhanced XRT position (Beardmore et al. GCN #19566) with r > 22.2 mag.
GCN Circular #19576
M. De Pasquale (UCL-MSSL) and A. D'Ai (INAF-IASFPA) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 160624A 77 s after the BAT trigger (D'Ai et al., GCN Circ. 19560). No optical afterglow consistent with the XRT position (Beardmore et al. GCN Circ. 19566) is detected in the initial and summed UVOT exposures, nor at the position of the SDSS galaxy mentioned by Cucchiara et al. (GCN Circ. 19565). Preliminary 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first finding chart (FC) exposure and subsequent exposures are:
```
Filter         T_start(s)   T_stop(s)      Exp(s)         Mag

white_FC            77          227          147         >20.8
u_FC               289          527          234         >20.0
white               77         6288          541         >21.5
v                 5060         6657          352         >19.5
b                 4445         6082          393         >20.7
u                  289        12622         1073         >20.7
w1                5471        11954         1082         >20.8
m2                5266        11048         1082         >20.7
w2                4855         6494          393         >20.3
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.07 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #19688
K. P. Mooley, T. D. Staley, R. P. Fender (Oxford), G. E. Anderson (Curtin), T. Cantwell (Manchester), C. Rumsey, D. Titterington, S. Carey, J. Hickish, Y. C. Perrott, N. Razavi-Ghods, P. Scott (Cambridge), K. Grainge, A. Scaife (Manchester)
The AMI Large Array robotically triggered on the Swift alert for GRB 160624A (D'Ai et al., GCN 19560) 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 Jun 24.97, Jun 29.18, and Jul 02.05 (UT) do not reveal any radio source at the XRT location (Beardmore et al., GCN 19566), with 3sigma upper limits of 268 uJy, 93 uJy, and 114 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: 13-Jul-2016 [Disclaimer]