Gamma-ray Burst 140610A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE


TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 10 Jun 14 16:32:13 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     601259,   Seg_Num: 0
GRB_RA:          286.260d {+19h 05m 02s} (J2000),
                 286.440d {+19h 05m 45s} (current),
                 285.637d {+19h 02m 33s} (1950)
GRB_DEC:          +3.907d {+03d 54' 24"} (J2000),
                  +3.929d {+03d 55' 46"} (current),
                  +3.830d {+03d 49' 49"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       15426 [cnts]    Image_Peak=748 [image_cnts]
TRIGGER_DUR:     4.096 [sec] 
TRIGGER_INDEX:   298     E_range: 25-100 keV
BKG_INTEN:       118930 [cnts]
BKG_TIME:        59435.87 SOD {16:30:35.87} UT
BKG_DUR:         40 [sec]
GRB_DATE:        16818 TJD;   161 DOY;   14/06/10
GRB_TIME:        59489.44 SOD {16:31:29.44} UT
GRB_PHI:          98.91 [deg]
GRB_THETA:        19.60 [deg]
SOLN_STATUS:     0x20000003
RATE_SIGNIF:     14.96 [sigma]
IMAGE_SIGNIF:    14.55 [sigma]
MERIT_PARAMS:     +1  +0  +0  +2  +2  +3  +0  +1 +78  +0 
SUN_POSTN:        78.82d {+05h 15m 17s}  +23.04d {+23d 02' 20"}
SUN_DIST:        141.87 [deg]   Sun_angle= 10.2 [hr] (West of Sun)
MOON_POSTN:      224.80d {+14h 59m 13s}  -15.21d {-15d 12' 34"}
MOON_DIST:        63.94 [deg]
MOON_ILLUM:      92 [%]
GAL_COORDS:       37.96, -1.24 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      288.16, 26.33 [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 = 230.24,18.68 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This BAT event is temporally(1.0<100sec) coincident with the FERMI_GBM event (trignum=424110691).

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Tue 10 Jun 14 16:31:53 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      45
TRIGGER_NUM:     424110691
GRB_RA:          325.983d {+21h 43m 56s} (J2000),
                 326.097d {+21h 44m 23s} (current),
                 325.589d {+21h 42m 21s} (1950)
GRB_DEC:         +57.650d {+57d 38' 60"} (J2000),
                 +57.717d {+57d 43' 00"} (current),
                 +57.420d {+57d 25' 11"} (1950)
GRB_ERROR:       14.28 [deg radius, statistical plus systematic]
GRB_INTEN:       144 [cnts/sec]
DATA_SIGNIF:     4.90 [sigma]
INTEG_TIME:      4.096 [sec]
GRB_DATE:        16818 TJD;   161 DOY;   14/06/10
GRB_TIME:        59488.58 SOD {16:31:28.58} UT
GRB_PHI:         204.00 [deg]
GRB_THETA:       155.00 [deg]
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO:      1.00
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      52%  GRB
2nd_MOST_LIKELY:  46%  Distant Particles
DETECTORS:       0,0,0, 0,0,0, 0,0,1, 0,1,1, 0,0,
SUN_POSTN:        78.82d {+05h 15m 17s}  +23.04d {+23d 02' 20"}
SUN_DIST:         81.89 [deg]   Sun_angle= 7.5 [hr] (West of Sun)
MOON_POSTN:      224.80d {+14h 59m 12s}  -15.21d {-15d 12' 31"}
MOON_DIST:       108.83 [deg]
MOON_ILLUM:      92 [%]
GAL_COORDS:       99.90,  3.42 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:        7.88, 63.40 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2014/bn140610689/quicklook/glg_lc_medres34_bn140610689.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 89.32,-22.57 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Tue 10 Jun 14 16:32:06 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      56
TRIGGER_NUM:     424110691
GRB_RA:          314.740d {+20h 58m 58s} (J2000),
                 314.878d {+20h 59m 31s} (current),
                 314.261d {+20h 57m 03s} (1950)
GRB_DEC:         +39.190d {+39d 11' 24"} (J2000),
                 +39.247d {+39d 14' 48"} (current),
                 +38.995d {+38d 59' 42"} (1950)
GRB_ERROR:       39.45 [deg radius, statistical only]
DATA_SIGNIF:     6.90 [sigma]
DATA_INTERVAL:   4.096 [sec]
GRB_DATE:        16818 TJD;   161 DOY;   14/06/10
GRB_TIME:        59488.58 SOD {16:31:28.58} UT
GRB_PHI:         179.00 [deg]
GRB_THETA:       140.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4143 (Gnd S/W Version number)
SUN_POSTN:        78.82d {+05h 15m 17s}  +23.04d {+23d 02' 20"}
SUN_DIST:         98.65 [deg]   Sun_angle= 8.3 [hr] (West of Sun)
MOON_POSTN:      224.80d {+14h 59m 12s}  -15.21d {-15d 12' 33"}
MOON_DIST:        99.61 [deg]
MOON_ILLUM:      92 [%]
GAL_COORDS:       81.63, -4.37 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      335.06, 53.01 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2014/bn140610689/quicklook/glg_lc_medres34_bn140610689.gif
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 10 Jun 14 16:35:00 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     601259,   Seg_Num: 0
GRB_RA:          286.260d {+19h 05m 02s} (J2000),
                 286.440d {+19h 05m 45s} (current),
                 285.637d {+19h 02m 33s} (1950)
GRB_DEC:          +3.907d {+03d 54' 24"} (J2000),
                  +3.929d {+03d 55' 46"} (current),
                  +3.830d {+03d 49' 49"} (1950)
GRB_DATE:        16818 TJD;   161 DOY;   14/06/10
GRB_TIME:        59489.44 SOD {16:31:29.44} UT
TRIGGER_INDEX:   298
GRB_PHI:          98.91 [deg]
GRB_THETA:        19.60 [deg]
DELTA_TIME:      -76.00 [sec]
TRIGGER_DUR:     4.096 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     14.96 [sigma]
IMAGE_SIGNIF:    14.55 [sigma]
LC_URL:          sw00601259000msb.lc
SUN_POSTN:        78.82d {+05h 15m 17s}  +23.04d {+23d 02' 20"}
SUN_DIST:        141.87 [deg]   Sun_angle= 10.2 [hr] (West of Sun)
MOON_POSTN:      224.83d {+14h 59m 19s}  -15.22d {-15d 12' 53"}
MOON_DIST:        63.91 [deg]
MOON_ILLUM:      92 [%]
GAL_COORDS:       37.96, -1.24 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      288.16, 26.33 [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 = 230.24,18.68 [deg].

GCN Circular #16375
P. A. Evans (U Leicester), S. D. Barthelmy (GSFC), D. N. Burrows (PSU), J. R. Cummings (NASA/UMBC), N. Gehrels (NASA/GSFC), F. E. Marshall (NASA/GSFC), D. M. Palmer (LANL), J. L. Racusin (NASA/GSFC) and M. H. Siegel (PSU) report on behalf of the Swift Team:
At 16:31:29 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 140610A (trigger=601259). Swift will have a delayed slew due to the Earth observing constraint. The BAT on-board calculated location is RA, Dec 286.260, +3.907, which is
```
   RA(J2000)  =  19h 05m 02s
   Dec(J2000) = +03d 54' 24"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a long peak with a duration of at least 110 sec. The peak count rate was ~1500 counts/sec (15-350 keV), at ~3 sec after the trigger.
Due to an observing constraint, Swift will not slew until T0+49.4 minutes. There will be no XRT or UVOT data until this time.
As the XRT is currently in Manual State due to an anomaly there will be no prompt data products for this burst once Swift slews. The XRT is still collecting data, and the usual automated analyses will be available once the data are on the ground. The XRT GCN circulars will be produced, once manual verification has taken place due to the uncertain calibration of XRT in its anomaly state. Please see GCN Circ. 16356 for details.
Burst Advocate for this burst is P. A. Evans (pae9 AT star.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 NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 10 Jun 14 17:27:29 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     601259,   Seg_Num: 0
POINT_RA:        286.282d {+19h 05m 08s} (J2000)
POINT_DEC:        +3.865d {+03d 51' 53"} (J2000)
POINT_ROLL:      43.511d
IMG_START_DATE:  16818 TJD;   161 DOY;   14/06/10
IMG_START_TIME:  62634.37 SOD {17:23:54.37} UT,   3144.9 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.230
N_STARS:         190
X_OFFSET:        420 [pixels]
Y_OFFSET:        204 [pixels]
X_MAX:           1379 [pixels]
Y_MAX:           1163 [pixels]
DET_THRESH:      15
PHOTO_THRESH:    8
SL_URL:          sw00601259000msufc3144.fits
SUN_POSTN:        78.86d {+05h 15m 27s}  +23.04d {+23d 02' 30"}
SUN_DIST:        141.91 [deg]   Sun_angle= 10.2 [hr] (West of Sun)
MOON_POSTN:      225.34d {+15h 01m 22s}  -15.32d {-15d 18' 57"}
MOON_DIST:        63.46 [deg]
MOON_ILLUM:      92 [%]
GAL_COORDS:       37.93, -1.28 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      288.18, 26.28 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 10 Jun 14 17:27:32 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     601259,   Seg_Num: 0
POINT_RA:        286.282d {+19h 05m 08s} (J2000)
POINT_DEC:        +3.865d {+03d 51' 53"} (J2000)
POINT_ROLL:      43.511d
IMG_START_DATE:  16818 TJD;   161 DOY;   14/06/10
IMG_START_TIME:  62634.37 SOD {17:23:54.37} UT,   3144.9 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.230
N_STARS:         190
X_OFFSET:        420 [pixels]
Y_OFFSET:        204 [pixels]
X_MAX:           1379 [pixels]
Y_MAX:           1163 [pixels]
DET_THRESH:      15
PHOTO_THRESH:    8
SL_URL:          sw00601259000msufc3144.fits
SUN_POSTN:        78.86d {+05h 15m 27s}  +23.04d {+23d 02' 30"}
SUN_DIST:        141.91 [deg]   Sun_angle= 10.2 [hr] (West of Sun)
MOON_POSTN:      225.34d {+15h 01m 22s}  -15.32d {-15d 18' 58"}
MOON_DIST:        63.46 [deg]
MOON_ILLUM:      92 [%]
GAL_COORDS:       37.93, -1.28 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      288.18, 26.28 [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:     Tue 10 Jun 14 17:28:36 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     601259,   Seg_Num: 0
POINT_RA:        286.282d {+19h 05m 08s} (J2000)
POINT_DEC:        +3.865d {+03d 51' 53"} (J2000)
ROLL:            43.511d
IMG_START_DATE:  16818 TJD;   161 DOY;   14/06/10
IMG_START_TIME:  62634.37 SOD {17:23:54.37} UT,   3144.9 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     424113846
X_OFFSET:        739 [pixels]
Y_OFFSET:        523 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       899
Y_GRB_POS:       683
BINNING_INDEX:   1
IM_URL:          sw00601259000msuni3157.fits
SUN_POSTN:        78.86d {+05h 15m 27s}  +23.04d {+23d 02' 30"}
SUN_DIST:        141.91 [deg]   Sun_angle= 10.2 [hr] (West of Sun)
MOON_POSTN:      225.35d {+15h 01m 25s}  -15.32d {-15d 19' 05"}
MOON_DIST:        63.45 [deg]
MOON_ILLUM:      92 [%]
GAL_COORDS:       37.93, -1.28 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      288.18, 26.28 [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:     Tue 10 Jun 14 17:28:52 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     601259,   Seg_Num: 0
POINT_RA:        286.282d {+19h 05m 08s} (J2000)
POINT_DEC:        +3.865d {+03d 51' 53"} (J2000)
ROLL:            43.511d
IMG_START_DATE:  16818 TJD;   161 DOY;   14/06/10
IMG_START_TIME:  62634.37 SOD {17:23:54.37} UT,   3144.9 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     424113846
X_OFFSET:        739 [pixels]
Y_OFFSET:        523 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       899
Y_GRB_POS:       683
BINNING_INDEX:   1
IM_URL:          sw00601259000msuni3157.fits
SUN_POSTN:        78.86d {+05h 15m 27s}  +23.04d {+23d 02' 30"}
SUN_DIST:        141.91 [deg]   Sun_angle= 10.2 [hr] (West of Sun)
MOON_POSTN:      225.35d {+15h 01m 25s}  -15.32d {-15d 19' 07"}
MOON_DIST:        63.45 [deg]
MOON_ILLUM:      92 [%]
GAL_COORDS:       37.93, -1.28 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      288.18, 26.28 [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:     Tue 10 Jun 14 17:58:25 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     601259,   Seg_Num: 0
POINT_RA:        286.282d {+19h 05m 08s} (J2000)
POINT_DEC:        +3.863d {+03d 51' 46"} (J2000)
IMG_START_DATE:  16818 TJD;   161 DOY;   14/06/10
IMG_START_TIME:  64698.38 SOD {17:58:18.38} UT,   5208.9 [sec] since BAT Trigger Time
COUNTS:          7    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:     Tue 10 Jun 14 18:02:31 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     601259,   Seg_Num: 0
GRB_RA:          286.2683d {+19h 05m 04.39s} (J2000),
                 286.4480d {+19h 05m 47.52s} (current),
                 285.6459d {+19h 02m 35.01s} (1950)
GRB_DEC:          +3.9071d {+03d 54' 25.5"} (J2000),
                  +3.9297d {+03d 55' 47.0"} (current),
                  +3.8306d {+03d 49' 50.0"} (1950)
GRB_ERROR:       5.4 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  16818 TJD;   161 DOY;   14/06/10
IMG_START_TIME:  64716.00 SOD {17:58:36.00} UT,   5226.6 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        78.89d {+05h 15m 33s}  +23.04d {+23d 02' 37"}
SUN_DIST:        141.91 [deg]   Sun_angle= 10.2 [hr] (West of Sun)
MOON_POSTN:      225.68d {+15h 02m 44s}  -15.38d {-15d 22' 58"}
MOON_DIST:        63.15 [deg]
MOON_ILLUM:      92 [%]
GAL_COORDS:       37.96, -1.25 [deg] galactic lon,lat of the burst
ECL_COORDS:      288.17, 26.33 [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 Circular #16376
J.A. Kennea (PSU), G. Cusumano (INAF-IASF PA), M. Perri (ASDC), P.A. Evans (U. Leicester), J.P. Osborne (U. Leicester) and D.N. Burrows (PSU) report on behalf of the Swift-XRT team:
The XRT began observing the field of GRB 140610A at 17:58:18.3 UT, 5209.0 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source located at RA, Dec 286.26822, 3.90743 which is equivalent to:
```
   RA(J2000)  = 19h 05m 04.37s
   Dec(J2000) = +03d 54' 26.7"
```
with an uncertainty of 4.1 arcseconds (radius, 90% containment). This location is 29 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 1.19 x 10^22 cm^-2 (Willingale et al. 2013).
GCN Circular #16379
S. Golenetskii, R.Aptekar, D. Frederiks, V. Pal'shin, P. Oleynik, M. Ulanov, D. Svinkin, A. Tsvetkova, A.Lyssenko, and T. Cline on behalf of the Konus-Wind team, report:
The long GRB 140610A (Swift-BAT trigger #601259: Evans et al., GCN 16375; T0(BAT)=3D16:31:29 UT) was detected by Konus-Wind in the waiting mode.
The light curve shows a broad emission pulse which started ~3 s before the BAT trigger, peaked at ~T0(BAT)+3 s, and lasted till ~T0(BAT)+150 s.
The K-W light curve of this burst is available at http://www.ioffe.rssi.ru/LEA/GRBs/GRB140610A/
As observed by Konus-Wind, the burst had a fluence of (1.6 =B1 0.3)x10^-5 erg/cm2 and a 2.944-s peak energy flux, measured from ~T0(BAT)+3 s, of (2.3 =B1 0.3)x10^-7 erg/cm2 (both in the 20 - 10000 keV energy range).
Modeling the KW 3-channel time-integrated spectrum (from T0(BAT)-3 s to T0(BAT)+150 s) by a power law with exponential cutoff model: dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep) yields alpha =3D -1.75 =B1 0.15, and Ep =3D 200 =B1 93 keV.
All the quoted errors are estimated at the 1 sigma confidence level. All the presented results are preliminary.
GCN Circular #16380
A. A. Breeveld (UCL-MSSL) and P. A. Evans (U Leicester) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 140610A 3145 s after the BAT trigger (Evans et al., GCN Circ. 16375). No optical afterglow consistent with the XRT position (Kennea et al. GCN Circ. 16376) is detected in the initial UVOT exposures. 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          3145         3295          147         >21.1
white             3145         9879         1229         >22.3
v                 3301         4937          393         >19.9
b                 4122         5685          320         >20.6
u                 3916         5552          393         >20.5
w1                3712         5347          393         >20.5
m2                3506         5142          393         >20.3
w2                4533        10719         1017         >21.3
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 2.56 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #16381
E. Gorbovskoy, V. Lipunov, M.Pruzhinskaya, 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)=20 located in Kislovodsk was pointed to the GRB140610A 16931 sec (~4.7 h)= =20 after trigger time at 2014-06-10 21:13:41 UT directly after weather=20 conditions became satisfactory. On our first single and coadd images we=20 haven`t found optical transient within Swift error-box (Evans et. al. GCN 16375). The 5-sigma unfiltgred upper limit has been about:
```
T_start             Exptime  dT[s]  Limit  Coadd
2014-06-10 21:13:41   180 s  17021  17.8    1
2014-06-10 21:13:41   540 s  17241  18.3    3
2014-06-10 21:13:41  3600 s  19079  18.5   20
2014-06-10 21:13:41 2x3600 s 19079  18.7   40*
```
* Coadd of images taken from two parallel tubes. dT is middle time of exposition (dT =3D T_middle - T_trigger) Our white (clear) band is well described by a parity 0.8R+0.2B (USNO B1). The very high extinction E(B-V) ~ 2.6 =D3omplicates the analysis.
The message may be cited.
GCN Circular #16382
A. Y. Lien (NASA/UMBC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), P. A. Evans (U Leicester), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU) (i.e. the Swift-BAT team):
Using the data set from T-240 to T+552 sec from the recent telemetry downlink, we report further analysis of BAT GRB 140610A (trigger #601259) (Evans, et al., GCN Circ. 16375). The BAT ground-calculated position is RA, Dec = 286.261, 3.899 deg, which is
```
   RA(J2000)  =  19h 05m 02.7s 
   Dec(J2000) = +03d 53' 56.7" 
```
with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 67%.
The mask-weighted light curve shows the emission starting at ~T-10 sec, peaking at ~T+1 sec, and continuing out to T+110 sec at which time the location left the BAT FoV when the Swift slewed to a pre-planned observing target.
The time-averaged spectrum from T-6.67 to T+105.7 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.57 +- 0.06. The 1-sec peak photon flux measured from T+0.48 sec in the 15-150 keV band is 1.4 +- 0.2 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/601259/BA/
GCN Circular #16383
Nat Butler (ASU), Alan M. Watson (UNAM), Alexander Kutyrev (GSFC), Willia= m 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 GRB 140610A (Evans, et al., GCN 16375) with the Reionization and Transients Infrared Camera (RATIR; www.ratir.org) on the 1.5m Harold Johnson Telescope at the Observatorio Astron=C3=B3mico Nacion= al on Sierra San Pedro M=C3=A1rtir from 2014/06 11.19 to 2014/06 11.20 UTC (12.= 06 to 12.26 hours after the BAT trigger), obtaining a total of 0.16 hours exposure in the r and i bands and 0.07 hours exposure in the Z, Y, J, and= H bands.
We detect no new sources within Swift-XRT error circle (Kennea et al., GC= N 16376). In comparison with 2MASS, we obtain the following 3-sigma upper limits:
```
 r > 20.22
 i > 19.15
 Z > 16.99
 Y > 17.40
 J > 16.68
 H > 17.62
```
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 #16385
Matthew Stanbro (UAH) reports on behalf of the Fermi GBM Team:
"At 16:31:28.58 UT on 10 June 2014, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 140610A (trigger 424110691 / 140610689) which was also detected by Swift BAT (Evans et al. 2014, GCN 16375). The GBM on-ground location, using the Fermi GBM trigger data, is consistent with Swift's location.
The GBM light curve shows a long burst, consisting of one main episode, with a total duration (T90) of about 134.1 s (50-300 keV). The time-averaged spectrum from T0-2.048 s to T0+133.122 s is well fit by a power law function with an exponential high-energy cutoff. The power law index is -1.32 +/- 0.08 and the cutoff energy, parameterized as Epeak, is 169 +/- 24 keV.
The event fluence (10-1000 keV) in this time interval is (1.2 +/- 0.1)E-05 erg/cm^2. The 1.024-sec peak photon flux measured starting from T0+0.00 s in the 10-1000 keV band is 2.5 +/- 0.3 ph/s/cm^2.
The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN Circular #16388
P. A. Evans (U Leicester) reports on behalf of the Swift-XRT team:
We have analysed 11 ks of XRT data for GRB 140610A (Evans et al. GCN Circ. 16375), from 3.1 ks to 115.0 ks after the BAT trigger. The data comprise 586 s in Windowed Timing (WT) mode with the remainder in Photon Counting (PC) mode. Using 463 s of PC mode data and 1 UVOT image, we find an enhanced XRT position (using the XRT-UVOT alignment and matching UVOT field sources to the USNO-B1 catalogue): RA, Dec = 286.26899, +3.90822 which is equivalent to:
```
RA (J2000): 19h 05m 04.56s
Dec(J2000): +03d 54' 29.6"
```
with an uncertainty of 3.1 arcsec (radius, 90% confidence).
The light curve from T0+3.1-10.6 ks can be modelled with a power-law decay with a decay index of alpha=0.66 (+0.26, -0.25). At T0+10.6 ks the count rate is 0.04 +/- 0.01 ct/sec. In subsequent observations, spanning T0+61-115 ks and containing 7.5 ks of exposure, the source is undetected with a 3-sigma upper limit of 0.002 ct/sec. This is substantially below the extrapolated decay detailed above, and suggests a decay index of alpha > 1.71.
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 2.3 (+0.9, -0.8). The best-fitting absorption column is 3.1 (+2.0, -1.4) x 10^22 cm^-2, in excess of the Galactic value of 1.2 x 10^22 cm^-2 (Willingale et al. 2013). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 6.0 x 10^-11 (2.0 x 10^-10) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     3.1 (+2.0, -1.4) x 10^22 cm^-2
Galactic foreground: 1.2 x 10^22 cm^-2
Excess significance: 2.2 sigma
Photon index:	     2.3 (+0.9, -0.8)
```
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00601259.
This circular is an official product of the Swift-XRT team.
GCN Circular #16422
A. Volnova (IKI), W. Mundrzyjewski (Fesenkov Astrophysical Institute), A. Kusakin (Fesenkov Astrophysical Institute), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration:
We observed the field of the Swift GRB 140610A (Evans et al., GCN 16375) with Zeiss-1000 (East) telescope of Tien Shan Astronomical Observatory starting on June 10, (UT) 16:49:37, i.e. 18 minutes after GRB trigger. We took several images in R-filter. Within enhanced XRT position (Evans et al., GCN 16388) we do not find any new source neither in the first image nor in a stacked image.
Details of the photometry are following:
```
date        UT start   t-T0       Filter  Exp.   UL(3 sigma)
                       (mid, days)          (s)
2014-06-10  16:49:37  0.04487     R       56*60  19.9
```
The photometry is based on USNO-B1.0 star
```
USNO-B1.0    RA           Dec        R2
0939-0410021 19:05:04.48 +03:54:23.3 16.75
```

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Jochen Greiner, last update: 20-Jun-2014 [Disclaimer]