Gamma-ray Burst 140516A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 16 May 14 20:31:17 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     599188,   Seg_Num: 0
GRB_RA:          252.988d {+16h 51m 57s} (J2000),
                 253.108d {+16h 52m 26s} (current),
                 252.571d {+16h 50m 17s} (1950)
GRB_DEC:         +39.915d {+39d 54' 53"} (J2000),
                 +39.891d {+39d 53' 29"} (current),
                 +39.997d {+39d 59' 50"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       608 [cnts]    Image_Peak=59 [image_cnts]
TRIGGER_DUR:     0.128 [sec] 
TRIGGER_INDEX:   122     E_range: 25-100 keV
BKG_INTEN:       22079 [cnts]
BKG_TIME:        73843.98 SOD {20:30:43.98} UT
BKG_DUR:         8 [sec]
GRB_DATE:        16793 TJD;   136 DOY;   14/05/16
GRB_TIME:        73854.79 SOD {20:30:54.79} UT
GRB_PHI:          40.67 [deg]
GRB_THETA:        22.69 [deg]
SOLN_STATUS:     0x83
RATE_SIGNIF:     13.41 [sigma]
IMAGE_SIGNIF:    6.73 [sigma]
MERIT_PARAMS:     +1  +0  +0  -3  +2  -3  +0  +0 +47  +0 
SUN_POSTN:        53.57d {+03h 34m 16s}  +19.23d {+19d 13' 39"}
SUN_DIST:        118.13 [deg]   Sun_angle= 10.7 [hr] (West of Sun)
MOON_POSTN:      262.65d {+17h 30m 35s}  -19.06d {-19d 03' 19"}
MOON_DIST:        59.62 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:       63.76, 39.24 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      241.75, 61.70 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This is a rate trigger.  
COMMENTS:        A point_source was found.  
COMMENTS:        This does not match any source in the on-board catalog.  
COMMENTS:        This does not match any source in the ground catalog.  
COMMENTS:        This is a GRB.  
COMMENTS:        Since the IMAGE_SIGNIF is less than 7 sigma, this is a questionable detection.  
COMMENTS:        This trigger occurred at longitude,latitude = 338.30,20.57 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 16 May 14 20:32:22 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     599188,   Seg_Num: 0
POINT_RA:        252.983d {+16h 51m 56s} (J2000)
POINT_DEC:       +39.922d {+39d 55' 19"} (J2000)
IMG_START_DATE:  16793 TJD;   136 DOY;   14/05/16
IMG_START_TIME:  73934.06 SOD {20:32:14.06} UT,   79.3 [sec] since BAT Trigger Time
COUNTS:          1    Min_needed= 20
STD_DEV:         0.00   Max_StdDev_for_Good=28.44 [arcsec]
PH2_ITER:        0    Max_iter_allowed= 4
ERROR_CODE:      1
COMMENTS:        SWIFT-XRT Nack Position.  
COMMENTS:        No source found in the image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 16 May 14 20:34:28 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     599188,   Seg_Num: 0
GRB_RA:          252.988d {+16h 51m 57s} (J2000),
                 253.108d {+16h 52m 26s} (current),
                 252.571d {+16h 50m 17s} (1950)
GRB_DEC:         +39.915d {+39d 54' 53"} (J2000),
                 +39.891d {+39d 53' 29"} (current),
                 +39.997d {+39d 59' 50"} (1950)
GRB_DATE:        16793 TJD;   136 DOY;   14/05/16
GRB_TIME:        73854.79 SOD {20:30:54.79} UT
TRIGGER_INDEX:   122
GRB_PHI:          40.67 [deg]
GRB_THETA:        22.69 [deg]
DELTA_TIME:      39.00 [sec]
TRIGGER_DUR:     0.128 [sec] 
SOLN_STATUS:     0x83
RATE_SIGNIF:     13.41 [sigma]
IMAGE_SIGNIF:    6.73 [sigma]
LC_URL:          sw00599188000msb.lc
SUN_POSTN:        53.57d {+03h 34m 16s}  +19.23d {+19d 13' 41"}
SUN_DIST:        118.13 [deg]   Sun_angle= 10.7 [hr] (West of Sun)
MOON_POSTN:      262.68d {+17h 30m 43s}  -19.06d {-19d 03' 18"}
MOON_DIST:        59.62 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:       63.76, 39.24 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      241.75, 61.70 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Lightcurve.  
COMMENTS:           
COMMENTS:        The next comments were copied from the BAT_POS Notice:  
COMMENTS:        This is a rate trigger.  
COMMENTS:        A point_source was found.  
COMMENTS:        This does not match any source in the on-board catalog.  
COMMENTS:        This does not match any source in the ground catalog.  
COMMENTS:        This is a GRB.  
COMMENTS:        Since the IMAGE_SIGNIF is less than 7 sigma, this is a questionable detection.  
COMMENTS:        This trigger occurred at longitude,latitude = 338.30,20.57 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 16 May 14 20:35:14 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     599188,   Seg_Num: 0
POINT_RA:        252.983d {+16h 51m 56s} (J2000)
POINT_DEC:       +39.922d {+39d 55' 20"} (J2000)
POINT_ROLL:      20.876d
IMG_START_DATE:  16793 TJD;   136 DOY;   14/05/16
IMG_START_TIME:  73938.63 SOD {20:32:18.63} UT,   83.8 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.354
N_STARS:         60
X_OFFSET:        462 [pixels]
Y_OFFSET:        634 [pixels]
X_MAX:           1421 [pixels]
Y_MAX:           1593 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00599188000msufc0083.fits
SUN_POSTN:        53.57d {+03h 34m 17s}  +19.23d {+19d 13' 41"}
SUN_DIST:        118.13 [deg]   Sun_angle= 10.7 [hr] (West of Sun)
MOON_POSTN:      262.69d {+17h 30m 45s}  -19.06d {-19d 03' 18"}
MOON_DIST:        59.63 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:       63.77, 39.24 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      241.74, 61.70 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 16 May 14 20:35:52 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     599188,   Seg_Num: 0
POINT_RA:        252.983d {+16h 51m 56s} (J2000)
POINT_DEC:       +39.922d {+39d 55' 20"} (J2000)
POINT_ROLL:      20.876d
IMG_START_DATE:  16793 TJD;   136 DOY;   14/05/16
IMG_START_TIME:  73938.63 SOD {20:32:18.63} UT,   83.8 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.354
N_STARS:         60
X_OFFSET:        462 [pixels]
Y_OFFSET:        634 [pixels]
X_MAX:           1421 [pixels]
Y_MAX:           1593 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00599188000msufc0083.fits
SUN_POSTN:        53.57d {+03h 34m 17s}  +19.23d {+19d 13' 42"}
SUN_DIST:        118.13 [deg]   Sun_angle= 10.7 [hr] (West of Sun)
MOON_POSTN:      262.70d {+17h 30m 47s}  -19.06d {-19d 03' 18"}
MOON_DIST:        59.63 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:       63.77, 39.24 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      241.74, 61.70 [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 16 May 14 20:36:38 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     599188,   Seg_Num: 0
POINT_RA:        252.983d {+16h 51m 56s} (J2000)
POINT_DEC:       +39.922d {+39d 55' 20"} (J2000)
ROLL:            20.876d
IMG_START_DATE:  16793 TJD;   136 DOY;   14/05/16
IMG_START_TIME:  73938.63 SOD {20:32:18.63} UT,   83.8 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     421965150
X_OFFSET:        781 [pixels]
Y_OFFSET:        953 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       941
Y_GRB_POS:       1113
BINNING_INDEX:   1
IM_URL:          sw00599188000msuni0096.fits
SUN_POSTN:        53.57d {+03h 34m 17s}  +19.23d {+19d 13' 42"}
SUN_DIST:        118.13 [deg]   Sun_angle= 10.7 [hr] (West of Sun)
MOON_POSTN:      262.70d {+17h 30m 49s}  -19.06d {-19d 03' 18"}
MOON_DIST:        59.63 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:       63.77, 39.24 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      241.74, 61.70 [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 16 May 14 20:36:42 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     599188,   Seg_Num: 0
GRB_RA:          252.9882d {+16h 51m 57.16s} (J2000),
                 253.1082d {+16h 52m 25.97s} (current),
                 252.5708d {+16h 50m 17.00s} (1950)
GRB_DEC:         +39.9622d {+39d 57' 43.9"} (J2000),
                 +39.9389d {+39d 56' 19.9"} (current),
                 +40.0446d {+40d 02' 40.6"} (1950)
GRB_ERROR:       4.2 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  16793 TJD;   136 DOY;   14/05/16
IMG_START_TIME:  73968.00 SOD {20:32:48.00} UT,   113.2 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        53.57d {+03h 34m 17s}  +19.23d {+19d 13' 42"}
SUN_DIST:        118.09 [deg]   Sun_angle= 10.7 [hr] (West of Sun)
MOON_POSTN:      262.70d {+17h 30m 49s}  -19.06d {-19d 03' 18"}
MOON_DIST:        59.67 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:       63.82, 39.24 [deg] galactic lon,lat of the burst
ECL_COORDS:      241.73, 61.74 [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 0.58% < P(seren) < 1.1%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 16 May 14 20:36:53 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     599188,   Seg_Num: 0
POINT_RA:        252.983d {+16h 51m 56s} (J2000)
POINT_DEC:       +39.922d {+39d 55' 20"} (J2000)
ROLL:            20.876d
IMG_START_DATE:  16793 TJD;   136 DOY;   14/05/16
IMG_START_TIME:  73938.63 SOD {20:32:18.63} UT,   83.8 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     421965150
X_OFFSET:        781 [pixels]
Y_OFFSET:        953 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       941
Y_GRB_POS:       1113
BINNING_INDEX:   1
IM_URL:          sw00599188000msuni0096.fits
SUN_POSTN:        53.57d {+03h 34m 17s}  +19.23d {+19d 13' 42"}
SUN_DIST:        118.13 [deg]   Sun_angle= 10.7 [hr] (West of Sun)
MOON_POSTN:      262.71d {+17h 30m 49s}  -19.06d {-19d 03' 18"}
MOON_DIST:        59.63 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:       63.77, 39.24 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      241.74, 61.70 [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:     Fri 16 May 14 20:41:48 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     599188,   Seg_Num: 0
POINT_RA:        252.981d {+16h 51m 55s} (J2000)
POINT_DEC:       +39.924d {+39d 55' 27"} (J2000)
POINT_ROLL:      20.874d
IMG_START_DATE:  16793 TJD;   136 DOY;   14/05/16
IMG_START_TIME:  74152.34 SOD {20:35:52.34} UT,   297.6 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.359
N_STARS:         59
X_OFFSET:        222 [pixels]
Y_OFFSET:        394 [pixels]
X_MAX:           1661 [pixels]
Y_MAX:           1833 [pixels]
DET_THRESH:      6
PHOTO_THRESH:    2
SL_URL:          sw00599188000msufc0297.fits
SUN_POSTN:        53.57d {+03h 34m 18s}  +19.23d {+19d 13' 45"}
SUN_DIST:        118.13 [deg]   Sun_angle= 10.7 [hr] (West of Sun)
MOON_POSTN:      262.76d {+17h 31m 02s}  -19.06d {-19d 03' 18"}
MOON_DIST:        59.64 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:       63.77, 39.25 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      241.74, 61.70 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 16 May 14 20:42:07 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     599188,   Seg_Num: 0
POINT_RA:        252.981d {+16h 51m 55s} (J2000)
POINT_DEC:       +39.924d {+39d 55' 27"} (J2000)
POINT_ROLL:      20.874d
IMG_START_DATE:  16793 TJD;   136 DOY;   14/05/16
IMG_START_TIME:  74152.34 SOD {20:35:52.34} UT,   297.6 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.359
N_STARS:         59
X_OFFSET:        222 [pixels]
Y_OFFSET:        394 [pixels]
X_MAX:           1661 [pixels]
Y_MAX:           1833 [pixels]
DET_THRESH:      6
PHOTO_THRESH:    2
SL_URL:          sw00599188000msufc0297.fits
SUN_POSTN:        53.57d {+03h 34m 18s}  +19.23d {+19d 13' 45"}
SUN_DIST:        118.13 [deg]   Sun_angle= 10.7 [hr] (West of Sun)
MOON_POSTN:      262.76d {+17h 31m 03s}  -19.06d {-19d 03' 18"}
MOON_DIST:        59.64 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:       63.77, 39.25 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      241.74, 61.70 [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 16 May 14 20:42:36 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     599188,   Seg_Num: 0
GRB_RA:          252.9890d {+16h 51m 57.36s} (J2000),
                 253.1090d {+16h 52m 26.16s} (current),
                 252.5716d {+16h 50m 17.19s} (1950)
GRB_DEC:         +39.9626d {+39d 57' 45.3"} (J2000),
                 +39.9393d {+39d 56' 21.3"} (current),
                 +40.0450d {+40d 02' 42.0"} (1950)
GRB_ERROR:       2.7 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  16793 TJD;   136 DOY;   14/05/16
IMG_START_TIME:  73968.00 SOD {20:32:48.00} UT,   113.2 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        53.57d {+03h 34m 18s}  +19.23d {+19d 13' 46"}
SUN_DIST:        118.09 [deg]   Sun_angle= 10.7 [hr] (West of Sun)
MOON_POSTN:      262.77d {+17h 31m 04s}  -19.06d {-19d 03' 17"}
MOON_DIST:        59.68 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:       63.82, 39.24 [deg] galactic lon,lat of the burst
ECL_COORDS:      241.73, 61.74 [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 0.58% < P(seren) < 1.1%.

GCN Circular #16285
M. G. Bernardini (INAF-OAB), S. D. Barthelmy (GSFC), S. B. Cenko (GSFC), P. D'Avanzo (INAF-OAB), J. A. Kennea (PSU), N. P. M. Kuin (UCL-MSSL), A. Y. Lien (NASA/GSFC/ORAU), V. Mangano (PSU), C. B. Markwardt (NASA/GSFC), F. E. Marshall (NASA/GSFC), A. Maselli (INAF-IASFPA), A. Melandri (INAF-OAB), D. M. Palmer (LANL), J. L. Racusin (NASA/GSFC), B. Sbarufatti (INAF-OAB/PSU), M. H. Siegel (PSU) and T. N. Ukwatta (MSU) report on behalf of the Swift Team:
At 20:30:54 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 140516A (trigger=599188). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 252.988, +39.915 which is
```
   RA(J2000) = 16h 51m 57s
   Dec(J2000) = +39d 54' 53"
```
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 0.1 sec. The peak count rate was ~3000 counts/sec (15-350 keV), at ~0.1 sec after the trigger.
The XRT began observing the field at 20:32:14.0 UT, 79.3 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source with an enhanced position: RA, Dec 252.9890, 39.9626 which is equivalent to:
```
   RA(J2000)  = 16h 51m 57.35s
   Dec(J2000) = +39d 57' 45.4"
```
with an uncertainty of 2.7 arcseconds (radius, 90% containment). This location is 171 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.
A power-law fit to a spectrum formed from promptly downlinked event data gives a column density consistent with the Galactic value of 1.52 x 10^20 cm^-2 (Willingale et al. 2013).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 83 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 none of the XRT error circle. 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 0.02.
Burst Advocate for this burst is M. G. Bernardini (grazia.bernardini AT brera.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 16 May 14 20:48:32 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     599188,   Seg_Num: 0
POINT_RA:        252.981d {+16h 51m 55s} (J2000)
POINT_DEC:       +39.924d {+39d 55' 27"} (J2000)
POINT_ROLL:      20.873d
IMG_START_DATE:  16793 TJD;   136 DOY;   14/05/16
IMG_START_TIME:  74729.19 SOD {20:45:29.19} UT,   874.4 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.366
N_STARS:         124
X_OFFSET:        222 [pixels]
Y_OFFSET:        394 [pixels]
X_MAX:           1661 [pixels]
Y_MAX:           1833 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00599188000msufc0874.fits
SUN_POSTN:        53.58d {+03h 34m 19s}  +19.23d {+19d 13' 49"}
SUN_DIST:        118.13 [deg]   Sun_angle= 10.7 [hr] (West of Sun)
MOON_POSTN:      262.83d {+17h 31m 19s}  -19.05d {-19d 03' 17"}
MOON_DIST:        59.65 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:       63.77, 39.25 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      241.74, 61.70 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 16 May 14 20:48:47 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     599188,   Seg_Num: 0
POINT_RA:        252.981d {+16h 51m 55s} (J2000)
POINT_DEC:       +39.924d {+39d 55' 27"} (J2000)
POINT_ROLL:      20.873d
IMG_START_DATE:  16793 TJD;   136 DOY;   14/05/16
IMG_START_TIME:  74729.19 SOD {20:45:29.19} UT,   874.4 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.366
N_STARS:         124
X_OFFSET:        222 [pixels]
Y_OFFSET:        394 [pixels]
X_MAX:           1661 [pixels]
Y_MAX:           1833 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00599188000msufc0874.fits
SUN_POSTN:        53.58d {+03h 34m 19s}  +19.23d {+19d 13' 49"}
SUN_DIST:        118.13 [deg]   Sun_angle= 10.7 [hr] (West of Sun)
MOON_POSTN:      262.83d {+17h 31m 19s}  -19.05d {-19d 03' 17"}
MOON_DIST:        59.65 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:       63.77, 39.25 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      241.74, 61.70 [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 16 May 14 20:50:21 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     599188,   Seg_Num: 0
POINT_RA:        252.981d {+16h 51m 55s} (J2000)
POINT_DEC:       +39.924d {+39d 55' 27"} (J2000)
ROLL:            20.873d
IMG_START_DATE:  16793 TJD;   136 DOY;   14/05/16
IMG_START_TIME:  74729.19 SOD {20:45:29.19} UT,   874.4 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     421965941
X_OFFSET:        781 [pixels]
Y_OFFSET:        953 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       941
Y_GRB_POS:       1113
BINNING_INDEX:   1
IM_URL:          sw00599188000msuni0887.fits
SUN_POSTN:        53.58d {+03h 34m 19s}  +19.23d {+19d 13' 50"}
SUN_DIST:        118.13 [deg]   Sun_angle= 10.7 [hr] (West of Sun)
MOON_POSTN:      262.85d {+17h 31m 23s}  -19.05d {-19d 03' 16"}
MOON_DIST:        59.65 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:       63.77, 39.25 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      241.74, 61.70 [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 16 May 14 20:50:37 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     599188,   Seg_Num: 0
POINT_RA:        252.981d {+16h 51m 55s} (J2000)
POINT_DEC:       +39.924d {+39d 55' 27"} (J2000)
ROLL:            20.873d
IMG_START_DATE:  16793 TJD;   136 DOY;   14/05/16
IMG_START_TIME:  74729.19 SOD {20:45:29.19} UT,   874.4 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     421965941
X_OFFSET:        781 [pixels]
Y_OFFSET:        953 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       941
Y_GRB_POS:       1113
BINNING_INDEX:   1
IM_URL:          sw00599188000msuni0887.fits
SUN_POSTN:        53.58d {+03h 34m 19s}  +19.23d {+19d 13' 50"}
SUN_DIST:        118.13 [deg]   Sun_angle= 10.7 [hr] (West of Sun)
MOON_POSTN:      262.85d {+17h 31m 24s}  -19.05d {-19d 03' 16"}
MOON_DIST:        59.65 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:       63.77, 39.25 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      241.74, 61.70 [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 #16286
P D'Avanzo, A. Melandri, M. G. Bernardini (INAF-OAB), M. Cecconi, G. Mainella (INAF/TNG) report on behalf of a larger collaboration:
We observed the field of the short GRB 140516A (Bernardini et al. GCN 16285) using the DOLORES camera on the 3.6m TNG telescope sited in Canary Islands. We obtained four images with the r SDSS filter, each one lasting 180 s, at a mean time of 1.55 hours after the burst.
In the co-added image we do not detect any optical afterglow inside the XRT error circle reported by Bernardini et al. (GCN 16285). The 3sigma limiting magnitude is r = 23.0 (AB).
GCN Circular #16287
V. Nevskiy (ISON), V. Linkov (ISON), A. Volnova (IKI), I. Molotov (KIAM), A. Pozanenko (IKI), report on behalf of larger collaboration:
We observed the field of GRB 140516A (Bernardini et al., GCN 16285) with ORI-40 (0.4-m f/3) telescope of ISON-Kislovodsk observatory. Observations started on May 16 (UT) 20:39:04 and continued up to (UT) 21:11:60. We obtained several unfiltered images of 30 s and 100 s exposures. In a preliminary analysis we do not detect evident source within XRT error circle (Bernardini et al., GCN 16285) . The upper limit of a combined image is 20.5m and based on USNO-B1.0 (R2) nearby stars.
GCN Circular #16288
E. Gorbovskoy, V. Lipunov, V.Kornilov, D.Kuvshinov, A.Belinski, N.Tyurina, N.Shatskiy, P.Balanutsa, D.Zimnukhov, A.Kuznetsov, V.V.Chazov, D.Denisenko, A.Sankovich Lomonosov Moscow State University, Sternberg Astronomical Institute, Moscow State University
A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik Kislovodsk Solar Station of the Pulkovo Observatory
V.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov Blagoveschensk Educational State University, Blagoveschensk
K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk Irkutsk State University
V.Krushinski, I.Zalozhnih, A. Popov Ural Federal University, Kourovka
Hugo Levato and Carlos Saffe Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)
Claudio Mallamaci, Carlos Lopez and Federico Podest Observatorio Astronomico Felix Aguilar (OAFA)
MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in Kislovodsk was pointed to the GRB140516A 22 sec after notice time 44 sec after trigger time at 2014-05-16 20:31:39 UT in two polarizations. On our first (10s exposure) set we haven`t found optical transient within SWIFT error-box (Bernardini et. al GCN 16285). The 5-sigma upper limit has been about 17.0 mag. As we have a set of observations after that with exposures from 10 to 180 seconds during several hours. In table 1 some limits are provided.
```
Table 1
-------
T_start 	   Exptime   T-T_mead  T-T_start  T-T_stop  Filter  mlimit  Coadd
2014-05-16 20:31:39     10     49 sec     44 sec     54 sec   P|     17.0    1
2014-05-16 20:31:39     10     49 sec     44 sec     54 sec   P-     16.9    1
2014-05-16 20:31:39    780    466 sec     44 sec    889 sec   P|     19.6    13*
2014-05-16 20:31:39    780    466 sec     44 sec    889 sec   P|     19.3    13*
2014-05-16 20:45:54   3600   2914 sec    899 sec   4930 sec   P|     20.6    20
2014-05-16 20:45:54   3600   2914 sec    899 sec   4930 sec   P-     20.4    20
2014-05-16 20:45:54   7200   2914 sec    899 sec   4930 sec P| + P-  21.0    40**
---------------------------------------------------------------------------------
*  This is a set images with diffrent exposure times from 10 to 180 seconds.
** We has images synchronously in 2 channels. Therefore we can increase 
twice exptime in case of constant t_start and t_stop.
```
P- and P| is a polarization filter which are oriented at an angle 0 and 90 degrees to RA axis respectivel. T is a GRB trigger time.
The message may be cited.
GCN Circular #16289
J.P. Osborne, A.P. Beardmore, P.A. Evans and M.R. Goad (U. Leicester) report on behalf of the Swift-XRT team.
Using 461 s of XRT Photon Counting mode data and 1 UVOT images for GRB 140516A, 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 = 252.98931, +39.96284 which is equivalent to:
```
RA (J2000): 16h 51m 57.43s
Dec (J2000): +39d 57' 46.2"
```
with an uncertainty of 2.4 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 #16290
J. Gorosabel (IAA-CSIC, UPV-EHU), D. Xu (DARK/NBI), A. de Ugarte Postigo (IAA-CSIC, DARK/NBI), J.P.U. Fynbo (DARK/NBI), P. Jakobsson (U. Iceland), D. Malesani (DARK/NBI), N.R. Tanvir (U. Leicester), D. Watson (DARK/NBI), E. Gafton (OKC, Stockholm Univ.) and T. Libbrecht (Stockholm Univ.), report on behalf of a larger collaboration:
We imaged the field of GRB 140516A (Bernardini et al. GCNC 16285) with the 2.5m Nordic Optical telescope equipped with ALFOSC. The observations were carried out in the R-band on May 16.89163-16.97005 UT (0.88-2.77 hours post burst) with a total exposure time of 13x300s. We did not detect any objects brighter than R=24.5 (3 sigma Vega limit calibrated against USNO B1.0) consistent with the enhanced XRT position (Osborne et al. GCNC 16289).
GCN Circular #16291
B.P. Gompertz (U. Leicester), M. de Pasquale (INAF-IASFPA), A. Maselli (INAF-IASFPA), A. Melandri (INAF-OAB), M.C. Stroh (PSU), D.N. Burrows (PSU), J.A. Kennea (PSU), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester) and M.G. Bernardini report on behalf of the Swift-XRT team:
We have analysed 11 ks of XRT data for GRB 140516A (Bernardini et al. GCN Circ. 16285), from 64 s to 25.6 ks after the BAT trigger. The data comprise 8 s in Windowed Timing (WT) mode (taken while Swift was slewing), with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Osborne et al. (GCN Circ. 16289).
The light curve can be modelled with a power-law decay with a decay index of alpha=0.38 (+0.14, -0.12).
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 2.2 (+0.7, -0.4). The best-fitting absorption column is 2 (+14, -0) x 10^20 cm^-2, consistent with the Galactic value of 1.5 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 2.9 x 10^-11 (3.1 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     2 (+14, -0) x 10^20 cm^-2
Galactic foreground: 1.5 x 10^20 cm^-2
Excess significance: <1.6 sigma
Photon index:	     2.2 (+0.7, -0.4)
```
If the light curve continues to decay with a power-law decay index of 0.38, the count rate at T+24 hours will be 1.6 x 10^-3 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 4.7 x 10^-14 (5.0 x 10^-14) erg cm^-2 s^-1.
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00599188.
This circular is an official product of the Swift-XRT team.
GCN Circular #16292
M. Stamatikos (OSU), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), M. G. Bernardini (INAF-OAB), J. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), A. Y. Lien (NASA/UMBC), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), J. Tueller (GSFC), T. N. Ukwatta (MSU) (i.e. the Swift-BAT team):
Using the data set from T-240 to T+962 sec from recent telemetry downlinks, we report further analysis of BAT GRB 140516A (trigger #599188) (Bernardini, et al., GCN Circ. 16285). The BAT ground-calculated position is RA, Dec = 252.972, 39.958 deg, which is
```
   RA(J2000)  =  16h 51m 53.2s 
   Dec(J2000) = +39d 57' 28.5" 
```
with an uncertainty of 2.6 arcmin, (radius, sys+stat, 90% containment). The partial coding was 75%.
The mask-weighted light curve shows a single spike starting at ~T+0.0, peaking at ~T+0.05, and ending at ~T+0.3 sec. T90 (15-350 keV) is 0.19 +- 0.09 sec (estimated error including systematics).
The time-averaged spectrum from T-0.01 to T+0.18 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.87 +- 0.33. The fluence in the 15-150 keV band is 2.3 +- 0.6 x 10^-8 erg/cm2. The 1-sec peak photon flux measured from T-0.38 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/599188/BA/
GCN Circular #16293
N. P. M. Kuin (UCL-MSSL) and Bernardini (INAF-OAB) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 140516A 84 s after the BAT trigger (Bernardini et al., GCN Circ. 16285). No optical afterglow consistent with the XRT enhanced position (Osborne et al. GCN Circ. 16289) is detected in the initial UVOT exposures. The Enhanced position overlaps with the PSF wings of a star, and the light curve is consistent with a constant source. 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            84          234          147         >20.5
u_FC               298          547          246         >21.2
white               84        12686         1178         >20.6
v                  627         7762          607         >19.5
b                  553        12381         1294         >20.9
u                  298         8313          770         >21.0
w1                 676         8172          607         >21.6
m2                 651         7967          529         >21.0
w2                 602         7558          607         >21.1
```
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 #16294
W. Fong and E. Berger (Harvard) report:
"We observed the location of the short-duration GRB 140516A (Bernardini et al., GCN 16285) with the Gemini Multi-Object Spectrograph (GMOS) mounted on the Gemini-North 8-meter telescope at a mid-time of 2014 May 17.373 UT (12.38 hr post-burst). We obtained i-band observations for a total of 1800-sec in 0.5" seeing. We do not detect any optical source within the XRT position (Osborne et al., GCN 16289). Calibrated to SDSS, we therefore place a 3-sigma limit of i>26.1 AB mag on the optical afterglow of GRB 140516A at 12.38 hr after the burst.
We thank Gemini observer Lucas Fuhrman for assistance with these observations."
GCN Circular #16295
W. Fong, B. A. Zauderer and E. Berger (Harvard) report:
"We observed the field of the short-duration GRB 140516A (Bernardini et al., GCN 16285) with the Karl G. Jansky Very Large Array (VLA) beginning on 2014 May 17.48 UT (14.94 hr post-burst) at a mean frequency of 6 GHz. In 1 hour of observations, we do not detect any radio source in or around the enhanced XRT position (Osborne et al., GCN 16289). We therefore place a 3-sigma limit of 24 microJy on the radio afterglow of GRB 140516A at 14.94 hr after the burst.
We thank the VLA staff for quickly executing these observations."
GCN Circular #16296
Y. Minowa, T.-S. Pyo, J.-H. Kim (Subaru, NAOJ) and N. Kawai (Tokyo Tech) report on behalf of the Subaru GRB team:
We observed the field of the short GRB 140516A (Bernardini et al., GCN 16285) using IRCS+AO188 on the 8.2 m Subaru telescope, starting from 06:56 on May 17, 2014 UTC (about 10.4 hrs from the burst). We obtained the Kp-band images in 52 mas/pixel mode without AO correction for a total exposure time of 5880 sec under 0".7 seeing condition. We do not detect any source within the error circle reported by Osborne et al. (GCN 16289). We obtained the 3-sigma limit on the near-infrared afterglow of GRB 140516A of Kp>22.2 mag (Vega) at 10.4-12.7 hrs after the burst.
GCN Circular #16297
Nat Butler (ASU), Alan M. Watson (UNAM), Alexander Kutyrev (GSFC), William H. Lee (UNAM), Michael G. Richer (UNAM), Chris Klein (UCB), Ori Fox (UCB)= , J. Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (ORAU/GSFC), Eleonora Troja (GSFC), Owen Littlejohns (ASU), Enrico Ramirez-Ruiz (UCSC), Jos=C3=A9 A. de Diego (UNAM), Leonid Georgiev (UNAM)= , Jes=C3=BAs Gonz=C3=A1lez (UNAM), Carlos Rom=C3=A1n-Z=C3=BA=C3=B1iga (UNAM), Neil Geh= rels (GSFC), and Harvey Moseley (GSFC) report:
We observed the field of the short-duration GRB 140516A (Bernardini, et al., GCN 16285) with the Reionization and Transients Infrared Camera (RATIR; www.ratir.org) on the 1.5m Harold Johnson Telescope at the Observatorio Astron=C3=B3mico Nacional on Sierra San Pedro M=C3=A1rtir fr= om 2014/05 17.33 to 2014/05 17.46 UTC (11.41 to 14.56 hours after the BAT trigger), obtaining a total of 2.13 hours exposure in the r and i bands and 0.89 hours exposure in the Z, Y, J, and H bands.
For a source within the Swift-XRT error circle (Osborne, et al., GCN 16289), in comparison with the SDSS DR9 and 2MASS, we obtain the followin= g upper limits (3-sigma):
```
  r     > 23.57
  i     > 23.39
  Z     > 21.70
  Y     > 21.52
  J     > 22.00
  H     > 21.48
```
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=C3=B3mico Nacional in San Pedro M=C3=A1rtir.
GCN Circular #16313
M. G. Bernardini, P. D'Avanzo, A. Melandri, S. Campana (INAF-OAB), P. A. Evans, K. L. Page (U. Leicester), E. Troja (NASA/GSFC/UMCP) report on behalf of the Swift-XRT team:
We have analysed 24.4 ks of XRT data for GRB 140516A (Bernardini et al. GCN Circ. 16285), from 92 s to 397.8 ks after the BAT trigger, in Photon Counting (PC) mode.
The X-ray counterpart reported by Bernardini et al. (GCN Circ. 16285) and Gompertz et al. (GCN Circ. 16291) apparently disappeared in the data collected from t-t0=92.8 ks onwards. However, in the same dataset we find evidence for the presence of an unrelated source at the position RA, Dec = 252.99269, +39.95659 which is equivalent to:
```
RA (J2000): 16h 51m 58.25s
Dec (J2000): +39d 57' 23.7"
```
with an uncertainty of 4.0 arcsec (radius, 90% confidence).
This position is 24" away from the enhanced position for this burst reported by Osborne et al. (GCN Circ. 16289) while it is consistent with the source 165158.53+395728.9 reported in the Krawczyk et al. (2013; ApJS, 206, 4) QSO catalogue. We therefore caution that this field source is likely contaminating the late-time X-ray light curve of GRB 140516A, given the spatial proximity to its transient X-ray counterpart.

Back to JG's homepage

Jochen Greiner, last update: 22-May-2014 [Disclaimer]