Gamma-ray Burst 140626A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

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Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 26 Jun 14 00:34:00 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     602604,   Seg_Num: 0
GRB_RA:           77.350d {+05h 09m 24s} (J2000),
                  76.929d {+05h 07m 43s} (current),
                  78.824d {+05h 15m 18s} (1950)
GRB_DEC:         -82.630d {-82d 37' 46"} (J2000),
                 -82.612d {-82d 36' 42"} (current),
                 -82.687d {-82d 41' 13"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       26602 [cnts]    Image_Peak=772 [image_cnts]
TRIGGER_DUR:     8.192 [sec] 
TRIGGER_INDEX:   453     E_range: 15-50 keV
BKG_INTEN:       184474 [cnts]
BKG_TIME:        1891.81 SOD {00:31:31.81} UT
BKG_DUR:         64 [sec]
GRB_DATE:        16834 TJD;   177 DOY;   14/06/26
GRB_TIME:        1981.79 SOD {00:33:01.79} UT
GRB_PHI:          -9.11 [deg]
GRB_THETA:        13.60 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     15.96 [sigma]
IMAGE_SIGNIF:    11.59 [sigma]
MERIT_PARAMS:     +1  +0  +0  +3  +1  +1  +0  +0 +28  +0 
SUN_POSTN:        94.75d {+06h 19m 00s}  +23.36d {+23d 21' 54"}
SUN_DIST:        106.31 [deg]   Sun_angle= 1.2 [hr] (West of Sun)
MOON_POSTN:       78.73d {+05h 14m 56s}  +18.95d {+18d 56' 49"}
MOON_DIST:       101.56 [deg]
MOON_ILLUM:      2 [%]
GAL_COORDS:      295.24,-30.09 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      275.74,-73.68 [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 = 123.87,-19.52 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 26 Jun 14 00:34:50 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     602604,   Seg_Num: 0
POINT_RA:         77.335d {+05h 09m 20s} (J2000)
POINT_DEC:       -82.628d {-82d 37' 39"} (J2000)
IMG_START_DATE:  16834 TJD;   177 DOY;   14/06/26
IMG_START_TIME:  2081.72 SOD {00:34:41.72} UT,   99.9 [sec] since BAT Trigger Time
COUNTS:          3    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:     Thu 26 Jun 14 00:36:37 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     602604,   Seg_Num: 0
GRB_RA:           77.350d {+05h 09m 24s} (J2000),
                  76.929d {+05h 07m 43s} (current),
                  78.824d {+05h 15m 18s} (1950)
GRB_DEC:         -82.630d {-82d 37' 46"} (J2000),
                 -82.612d {-82d 36' 42"} (current),
                 -82.687d {-82d 41' 13"} (1950)
GRB_DATE:        16834 TJD;   177 DOY;   14/06/26
GRB_TIME:        1981.79 SOD {00:33:01.79} UT
TRIGGER_INDEX:   453
GRB_PHI:          -9.11 [deg]
GRB_THETA:        13.60 [deg]
DELTA_TIME:      -37.00 [sec]
TRIGGER_DUR:     8.192 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     15.96 [sigma]
IMAGE_SIGNIF:    11.59 [sigma]
LC_URL:          sw00602604000msb.lc
SUN_POSTN:        94.75d {+06h 19m 01s}  +23.36d {+23d 21' 54"}
SUN_DIST:        106.31 [deg]   Sun_angle= 1.2 [hr] (West of Sun)
MOON_POSTN:       78.76d {+05h 15m 02s}  +18.95d {+18d 56' 51"}
MOON_DIST:       101.56 [deg]
MOON_ILLUM:      2 [%]
GAL_COORDS:      295.24,-30.09 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      275.74,-73.68 [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 = 123.87,-19.52 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 26 Jun 14 00:37:49 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     602604,   Seg_Num: 0
POINT_RA:         77.332d {+05h 09m 20s} (J2000)
POINT_DEC:       -82.628d {-82d 37' 38"} (J2000)
POINT_ROLL:      16.657d
IMG_START_DATE:  16834 TJD;   177 DOY;   14/06/26
IMG_START_TIME:  2085.10 SOD {00:34:45.10} UT,   103.3 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.386
N_STARS:         50
X_OFFSET:        490 [pixels]
Y_OFFSET:        591 [pixels]
X_MAX:           1449 [pixels]
Y_MAX:           1550 [pixels]
DET_THRESH:      15
PHOTO_THRESH:    8
SL_URL:          sw00602604000msufc0103.fits
SUN_POSTN:        94.75d {+06h 19m 01s}  +23.36d {+23d 21' 54"}
SUN_DIST:        106.31 [deg]   Sun_angle= 1.2 [hr] (West of Sun)
MOON_POSTN:       78.77d {+05h 15m 05s}  +18.95d {+18d 56' 52"}
MOON_DIST:       101.56 [deg]
MOON_ILLUM:      2 [%]
GAL_COORDS:      295.24,-30.09 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      275.75,-73.68 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 26 Jun 14 00:38:27 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     602604,   Seg_Num: 0
POINT_RA:         77.332d {+05h 09m 20s} (J2000)
POINT_DEC:       -82.628d {-82d 37' 38"} (J2000)
POINT_ROLL:      16.657d
IMG_START_DATE:  16834 TJD;   177 DOY;   14/06/26
IMG_START_TIME:  2085.10 SOD {00:34:45.10} UT,   103.3 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.386
N_STARS:         50
X_OFFSET:        490 [pixels]
Y_OFFSET:        591 [pixels]
X_MAX:           1449 [pixels]
Y_MAX:           1550 [pixels]
DET_THRESH:      15
PHOTO_THRESH:    8
SL_URL:          sw00602604000msufc0103.fits
SUN_POSTN:        94.76d {+06h 19m 01s}  +23.36d {+23d 21' 53"}
SUN_DIST:        106.31 [deg]   Sun_angle= 1.2 [hr] (West of Sun)
MOON_POSTN:       78.77d {+05h 15m 06s}  +18.95d {+18d 56' 53"}
MOON_DIST:       101.56 [deg]
MOON_ILLUM:      2 [%]
GAL_COORDS:      295.24,-30.09 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      275.75,-73.68 [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:     Thu 26 Jun 14 00:39:12 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     602604,   Seg_Num: 0
GRB_RA:           77.3752d {+05h 09m 30.04s} (J2000),
                  76.9536d {+05h 07m 48.85s} (current),
                  78.8498d {+05h 15m 23.94s} (1950)
GRB_DEC:         -82.6320d {-82d 37' 55.2"} (J2000),
                 -82.6141d {-82d 36' 50.7"} (current),
                 -82.6894d {-82d 41' 21.7"} (1950)
GRB_ERROR:       4.1 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  16834 TJD;   177 DOY;   14/06/26
IMG_START_TIME:  2106.00 SOD {00:35:06.00} UT,   124.2 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        94.76d {+06h 19m 01s}  +23.36d {+23d 21' 53"}
SUN_DIST:        106.32 [deg]   Sun_angle= 1.2 [hr] (West of Sun)
MOON_POSTN:       78.78d {+05h 15m 08s}  +18.95d {+18d 56' 53"}
MOON_DIST:       101.57 [deg]
MOON_ILLUM:      2 [%]
GAL_COORDS:      295.24,-30.09 [deg] galactic lon,lat of the burst
ECL_COORDS:      275.72,-73.68 [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:     Thu 26 Jun 14 00:40:34 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     602604,   Seg_Num: 0
POINT_RA:         77.332d {+05h 09m 20s} (J2000)
POINT_DEC:       -82.628d {-82d 37' 38"} (J2000)
ROLL:            16.657d
IMG_START_DATE:  16834 TJD;   177 DOY;   14/06/26
IMG_START_TIME:  2085.10 SOD {00:34:45.10} UT,   103.3 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     425435697
X_OFFSET:        809 [pixels]
Y_OFFSET:        910 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       969
Y_GRB_POS:       1070
BINNING_INDEX:   1
IM_URL:          sw00602604000msuni0116.fits
SUN_POSTN:        94.76d {+06h 19m 02s}  +23.36d {+23d 21' 53"}
SUN_DIST:        106.31 [deg]   Sun_angle= 1.2 [hr] (West of Sun)
MOON_POSTN:       78.79d {+05h 15m 11s}  +18.95d {+18d 56' 54"}
MOON_DIST:       101.56 [deg]
MOON_ILLUM:      2 [%]
GAL_COORDS:      295.24,-30.09 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      275.75,-73.68 [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:     Thu 26 Jun 14 00:40:56 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     602604,   Seg_Num: 0
POINT_RA:         77.332d {+05h 09m 20s} (J2000)
POINT_DEC:       -82.628d {-82d 37' 38"} (J2000)
ROLL:            16.657d
IMG_START_DATE:  16834 TJD;   177 DOY;   14/06/26
IMG_START_TIME:  2085.10 SOD {00:34:45.10} UT,   103.3 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     425435697
X_OFFSET:        809 [pixels]
Y_OFFSET:        910 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       969
Y_GRB_POS:       1070
BINNING_INDEX:   1
IM_URL:          sw00602604000msuni0116.fits
SUN_POSTN:        94.76d {+06h 19m 02s}  +23.36d {+23d 21' 53"}
SUN_DIST:        106.31 [deg]   Sun_angle= 1.2 [hr] (West of Sun)
MOON_POSTN:       78.80d {+05h 15m 11s}  +18.95d {+18d 56' 55"}
MOON_DIST:       101.56 [deg]
MOON_ILLUM:      2 [%]
GAL_COORDS:      295.24,-30.09 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      275.75,-73.68 [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 #16456
J. R. Cummings (NASA/UMBC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), V. D'Elia (ASDC), N. Gehrels (NASA/GSFC), J. A. Kennea (PSU), H. A. Krimm (CRESST/GSFC/USRA), N. P. M. Kuin (UCL-MSSL), C. B. Markwardt (NASA/GSFC), F. E. Marshall (NASA/GSFC) and D. M. Palmer (LANL) report on behalf of the Swift Team:
At 00:33:01 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 140626A (trigger=602604). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 77.350, -82.630 which is
```
   RA(J2000)  =  05h 09m 24s
   Dec(J2000) = -82d 37' 46"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a double pulse structure with a duration of about 35 sec. The peak count rate was ~1500 counts/sec (15-350 keV), at ~5 sec after the trigger.
The XRT began observing the field at 00:34:41.7 UT, 99.9 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source located at RA, Dec 77.37387, -82.63218 which is equivalent
```
   RA(J2000)  = 05h 09m 29.73s
   Dec(J2000) = -82d 37' 55.8"
```
with an uncertainty of 4.0 arcseconds (radius, 90% containment). This location is 13 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 1.42 x 10^21 cm^-2 (Willingale et al. 2013).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 103 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 0.15.
Burst Advocate for this burst is J. R. Cummings (jayc AT milkyway.gsfc.nasa.gov). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/too.html.)
GCN Circular #16458
M. Tanga, J. F. Graham (both MPE Garching), D. A. Kann (TLS Tautenburg), and J. Greiner (MPE Garching) report on behalf of the GROND team:
We observed the field of GRB 140626A (Swift trigger 602604; Cummings et al., GCN #16456) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2 m MPG telescope at ESO La Silla Observatory (Chile).
Observations started at 00:45:12 UT on June 22, 2014, 12 minutes after the GRB trigger. They were performed at an average seeing of 2.4 and at an average airmass of 2.5.
We detect a source at the north-eastern edge of the the Swift-XRT error circle reported by Cummings et al., GCN #16456 at RA (J2000) = 05:09:30.79, Dec. (J2000) = -82:37:50.2, at AB magnitude:
```
g' = 21.9 +/- 0.1 mag,
r' = 20.9 +/- 0.1 mag,
i' = 20.4 +/- 0.1 mag, and
z' = 19.8 +/- 0.1 mag.
```
This object is not detected in the DSS. We propose it to be the afterglow of GRB 140626A but at this time cannot ascertain fading.
The magnitude was derived based on calibrating the image against the GROND zeropoint and is not corrected for the Galactic foreground extinction corresponding to a reddening of E_(B-V)= 0.15 mag in the direction of the burst (Schlegel et al. 1998).
GCN Circular #16459
A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team.
Using 1162 s of XRT Photon Counting mode data and 3 UVOT images for GRB 140626A, 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 = 77.38009, -82.63084 which is equivalent to:
```
RA (J2000): 05h 09m 31.22s
Dec (J2000): -82d 37' 51.0"
```
with an uncertainty of 2.1 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 #16460
N. P. M. Kuin (UCL-MSSL) and J. R. Cummings (NASA/UMBC) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 140626A 103 s after the BAT trigger (Cummings et al., GCN Circ. 16456). No optical afterglow consistent with the XRT position (Beardmore et al. GCN Circ. 16459) 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           103          253          147         >20.9
u_FC               262          511          246         >20.3
white              103         1538          392         >21.1
v                  592         1590          117         >19.0
b                  517         1514           97         >20.0
u                  262         1489          343         >20.4
w1                 642         1639          117         >19.4
m2                 617         1440           39         >19.1
w2                 568         1563          117         >19.9
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.15 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #16461
J.A. Kennea (PSU), B.P. Gompertz (U. Leicester), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), M. de Pasquale (INAF-IASFPA), A. Maselli (INAF-IASFPA), A. Melandri (INAF-OAB), V. Mangano (PSU), M.C. Stroh (PSU) and J.R. Cummings report on behalf of the Swift-XRT team:
We have analysed 8.5 ks of XRT data for GRB 140626A (Cummings et al. GCN Circ. 16456), from 86 s to 18.9 ks after the BAT trigger. The data comprise 7 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 Beardmore et al. (GCN Circ. 16459).
The light curve can be modelled with a power-law decay with a decay index of alpha=0.52 (+/-0.11).
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 2.06 (+0.34, -0.27). The best-fitting absorption column is 1.8 (+1.2, -0.4) x 10^21 cm^-2, consistent with the Galactic value of 1.4 x 10^21 cm^-2 (Willingale et al. 2013). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.4 x 10^-11 (4.6 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     1.8 (+1.2, -0.4) x 10^21 cm^-2
Galactic foreground: 1.4 x 10^21 cm^-2
Excess significance: <1.6 sigma
Photon index:	     2.06 (+0.34, -0.27)
```
If the light curve continues to decay with a power-law decay index of 0.52, the count rate at T+24 hours will be 7.5 x 10^-3 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 2.5 x 10^-13 (3.4 x 10^-13) erg cm^-2 s^-1.
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00602604.
This circular is an official product of the Swift-XRT team.
GCN Circular #16462
M. Stamatikos (OSU), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), 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 the recent telemetry downlink, we report further analysis of BAT GRB 140626A (trigger #602604) (Cummings, et al., GCN Circ. 16456). The BAT ground-calculated position is RA, Dec = 77.163, -82.625 deg which is
```
    RA(J2000)  =  05h 08m 39.1s
    Dec(J2000) = -82d 37' 29.5"
```
with an uncertainty of 1.5 arcmin, (radius, sys+stat, 90% containment). The partial coding was 100%.
The mask-weighted light curve shows a double-peaked structure. The first peak extends from T-10 sec to T+0 sec, while the second, comparably-sized peak extends from T+0 sec to T+10 sec. T90 (15-350 keV) is 16.4 +- 1.4 sec (estimated error including systematics).
The time-averaged spectrum from T-8.94 to T+9.08 sec is best fit by a power law with an exponential cutoff. This fit gives a photon index 0.61 +- 0.88, and Epeak of 44.7 +- 9.5 keV (chi squared 45.83 for 56 d.o.f.). For this model the total fluence in the 15-150 keV band is 3.6 +- 0.5 x 10^-7 erg/cm2 and the 1-sec peak flux measured from T+5.68 sec in the 15-150 keV band is 0.7 +- 0.1 ph/cm2/sec. A fit to a simple power law gives a photon index of 1.91 +- 0.17 (chi squared 54.28 for 57 d.o.f.). 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/602604/BA/
GCN Circular #16469
Klotz A., Turpin D. (IRAP-CNRS-OMP), Boer M., Gendre B., Siellez K., Dereli H., Bardho O. (UNS-CNRS-OCA), Atteia J.L. (IRAP-CNRS-OMP) report:
We imaged the field of GRB 140626A detected by SWIFT (trigger 602604) with the TAROT robotic telescope (D=25cm) located at the European Southern Observatory, La Silla observatory, Chile.
The observations started 72.1s after the GRB trigger (15.9s after the notice). The elevation of the field decreased from 23 degrees above horizon and weather conditions were good. Images were not accessible during two days due to a disk access problem.
The first image is trailed with a duration of 60.0s (see the description in Klotz et al., 2006, A&A 451, L39). We do not detect any OT with a limiting magnitude of: t0+72.1s to t0+132.1s : R > 16.6
The second image is 30.0s exposure in tracking mode: t0+145.4s to t0+175.4s : R > 17.6
We co-added a series of exposures: t0+145.4s to t0+437.3s : R > 19.2
Magnitudes were estimated with the nearby USNO-B1 stars and are not corrected for galactic dust extinction.

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Jochen Greiner, last update: 28-Jun-2014 [Disclaimer]