Gamma-ray Burst 120714A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 14 Jul 12 07:47:20 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     526593,   Seg_Num: 0
GRB_RA:          167.970d {+11h 11m 53s} (J2000),
                 168.122d {+11h 12m 29s} (current),
                 167.364d {+11h 09m 27s} (1950)
GRB_DEC:         -30.632d {-30d 37' 54"} (J2000),
                 -30.700d {-30d 42' 00"} (current),
                 -30.360d {-30d 21' 35"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       7613 [cnts]    Image_Peak=277 [image_cnts]
TRIGGER_DUR:     2.048 [sec] 
TRIGGER_INDEX:   264     E_range: 25-100 keV
BKG_INTEN:       74017 [cnts]
BKG_TIME:        27974.57 SOD {07:46:14.57} UT
BKG_DUR:         24 [sec]
GRB_DATE:        16122 TJD;   196 DOY;   12/07/14
GRB_TIME:        28006.76 SOD {07:46:46.76} UT
GRB_PHI:         -51.18 [deg]
GRB_THETA:        37.44 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     15.23 [sigma]
IMAGE_SIGNIF:    10.20 [sigma]
MERIT_PARAMS:     +1  +0  +0  +1  +2  +0  +0  +0 -28  +0 
SUN_POSTN:       114.06d {+07h 36m 13s}  +21.60d {+21d 35' 47"}
SUN_DIST:         73.66 [deg]   Sun_angle= -3.6 [hr] (East of Sun)
MOON_POSTN:       55.29d {+03h 41m 10s}  +20.29d {+20d 17' 31"}
MOON_DIST:       119.34 [deg]
MOON_ILLUM:      21 [%]
GAL_COORDS:      278.83, 27.54 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      182.59,-32.60 [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 = 207.98,-13.82 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 14 Jul 12 07:50:49 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     526593,   Seg_Num: 0
GRB_RA:          167.970d {+11h 11m 53s} (J2000),
                 168.122d {+11h 12m 29s} (current),
                 167.364d {+11h 09m 27s} (1950)
GRB_DEC:         -30.632d {-30d 37' 54"} (J2000),
                 -30.700d {-30d 42' 00"} (current),
                 -30.360d {-30d 21' 35"} (1950)
GRB_DATE:        16122 TJD;   196 DOY;   12/07/14
GRB_TIME:        28006.76 SOD {07:46:46.76} UT
TRIGGER_INDEX:   264
GRB_PHI:         -51.18 [deg]
GRB_THETA:        37.44 [deg]
DELTA_TIME:      -18.00 [sec]
TRIGGER_DUR:     2.048 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     15.23 [sigma]
IMAGE_SIGNIF:    10.20 [sigma]
LC_URL:          sw00526593000msb.lc
SUN_POSTN:       114.06d {+07h 36m 14s}  +21.60d {+21d 35' 46"}
SUN_DIST:         73.66 [deg]   Sun_angle= -3.6 [hr] (East of Sun)
MOON_POSTN:       55.32d {+03h 41m 17s}  +20.30d {+20d 17' 45"}
MOON_DIST:       119.32 [deg]
MOON_ILLUM:      21 [%]
GAL_COORDS:      278.83, 27.54 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      182.59,-32.60 [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 = 207.98,-13.82 [deg].

GCN Circular #13464
C. J. Saxton (UCL-MSSL), V. D'Elia (ASDC), S. R. Oates (UCL-MSSL), K. L. Page (U Leicester) and M. H. Siegel (PSU) report on behalf of the Swift Team:
At 07:46:46 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 120714A (trigger=526593). Swift could not immediately slew to the location due to the Earth limb constraint. The BAT on-board calculated location is RA, Dec 167.970, -30.632 which is
```
   RA(J2000) = 11h 11m 53s
   Dec(J2000) = -30d 37' 54"
```
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 20 sec. The peak count rate was ~1500 counts/sec (15-350 keV), at ~1 sec after the trigger.
Due to an observing constraint, Swift will not slew until T0+51 minutes. There will be no XRT or UVOT data until this time.
Burst Advocate for this burst is C. J. Saxton (cjs2 AT mssl.ucl.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:     Sat 14 Jul 12 08:41:09 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     526593,   Seg_Num: 0
POINT_RA:        167.957d {+11h 11m 50s} (J2000)
POINT_DEC:       -30.600d {-30d 35' 58"} (J2000)
IMG_START_DATE:  16122 TJD;   196 DOY;   12/07/14
IMG_START_TIME:  31262.26 SOD {08:41:02.26} UT,   3255.5 [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:     Sat 14 Jul 12 08:46:10 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     526593,   Seg_Num: 0
POINT_RA:        167.957d {+11h 11m 50s} (J2000)
POINT_DEC:       -30.599d {-30d 35' 57"} (J2000)
POINT_ROLL:      308.427d
IMG_START_DATE:  16122 TJD;   196 DOY;   12/07/14
IMG_START_TIME:  31265.90 SOD {08:41:05.90} UT,   3259.1 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        7.305
N_STARS:         44
X_OFFSET:        219 [pixels]
Y_OFFSET:        551 [pixels]
X_MAX:           1178 [pixels]
Y_MAX:           1510 [pixels]
DET_THRESH:      23
PHOTO_THRESH:    14
SL_URL:          sw00526593000msufc3259.fits
SUN_POSTN:       114.10d {+07h 36m 23s}  +21.59d {+21d 35' 24"}
SUN_DIST:         73.60 [deg]   Sun_angle= -3.6 [hr] (East of Sun)
MOON_POSTN:       55.80d {+03h 43m 13s}  +20.36d {+20d 21' 32"}
MOON_DIST:       118.92 [deg]
MOON_ILLUM:      21 [%]
GAL_COORDS:      278.80, 27.56 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      182.56,-32.58 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 14 Jul 12 08:46:31 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     526593,   Seg_Num: 0
POINT_RA:        167.957d {+11h 11m 50s} (J2000)
POINT_DEC:       -30.599d {-30d 35' 57"} (J2000)
POINT_ROLL:      308.427d
IMG_START_DATE:  16122 TJD;   196 DOY;   12/07/14
IMG_START_TIME:  31265.90 SOD {08:41:05.90} UT,   3259.1 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        7.305
N_STARS:         44
X_OFFSET:        219 [pixels]
Y_OFFSET:        551 [pixels]
X_MAX:           1178 [pixels]
Y_MAX:           1510 [pixels]
DET_THRESH:      23
PHOTO_THRESH:    14
SL_URL:          sw00526593000msufc3259.fits
SUN_POSTN:       114.10d {+07h 36m 23s}  +21.59d {+21d 35' 24"}
SUN_DIST:         73.60 [deg]   Sun_angle= -3.6 [hr] (East of Sun)
MOON_POSTN:       55.81d {+03h 43m 13s}  +20.36d {+20d 21' 33"}
MOON_DIST:       118.91 [deg]
MOON_ILLUM:      21 [%]
GAL_COORDS:      278.80, 27.56 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      182.56,-32.58 [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:     Sat 14 Jul 12 08:47:43 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     526593,   Seg_Num: 0
POINT_RA:        167.957d {+11h 11m 50s} (J2000)
POINT_DEC:       -30.599d {-30d 35' 57"} (J2000)
ROLL:            308.427d
IMG_START_DATE:  16122 TJD;   196 DOY;   12/07/14
IMG_START_TIME:  31265.90 SOD {08:41:05.90} UT,   3259.1 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     363948075
X_OFFSET:        538 [pixels]
Y_OFFSET:        870 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       698
Y_GRB_POS:       1030
BINNING_INDEX:   1
IM_URL:          sw00526593000msuni3269.fits
SUN_POSTN:       114.10d {+07h 36m 24s}  +21.59d {+21d 35' 24"}
SUN_DIST:         73.60 [deg]   Sun_angle= -3.6 [hr] (East of Sun)
MOON_POSTN:       55.82d {+03h 43m 16s}  +20.36d {+20d 21' 38"}
MOON_DIST:       118.91 [deg]
MOON_ILLUM:      21 [%]
GAL_COORDS:      278.80, 27.56 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      182.56,-32.58 [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:     Sat 14 Jul 12 08:47:58 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     526593,   Seg_Num: 0
POINT_RA:        167.957d {+11h 11m 50s} (J2000)
POINT_DEC:       -30.599d {-30d 35' 57"} (J2000)
ROLL:            308.427d
IMG_START_DATE:  16122 TJD;   196 DOY;   12/07/14
IMG_START_TIME:  31265.90 SOD {08:41:05.90} UT,   3259.1 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     363948075
X_OFFSET:        538 [pixels]
Y_OFFSET:        870 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       698
Y_GRB_POS:       1030
BINNING_INDEX:   1
IM_URL:          sw00526593000msuni3269.fits
SUN_POSTN:       114.10d {+07h 36m 24s}  +21.59d {+21d 35' 24"}
SUN_DIST:         73.60 [deg]   Sun_angle= -3.6 [hr] (East of Sun)
MOON_POSTN:       55.82d {+03h 43m 16s}  +20.36d {+20d 21' 39"}
MOON_DIST:       118.90 [deg]
MOON_ILLUM:      21 [%]
GAL_COORDS:      278.80, 27.56 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      182.56,-32.58 [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:     Sat 14 Jul 12 08:57:45 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     526593,   Seg_Num: 0
GRB_RA:          167.9841d {+11h 11m 56.18s} (J2000),
                 168.1361d {+11h 12m 32.67s} (current),
                 167.3786d {+11h 09m 30.85s} (1950)
GRB_DEC:         -30.6276d {-30d 37' 39.3"} (J2000),
                 -30.6959d {-30d 41' 45.1"} (current),
                 -30.3556d {-30d 21' 20.1"} (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:  16122 TJD;   196 DOY;   12/07/14
IMG_START_TIME:  31367.00 SOD {08:42:47.00} UT,   3360.2 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       114.10d {+07h 36m 25s}  +21.59d {+21d 35' 20"}
SUN_DIST:         73.63 [deg]   Sun_angle= -3.6 [hr] (East of Sun)
MOON_POSTN:       55.90d {+03h 43m 37s}  +20.37d {+20d 22' 19"}
MOON_DIST:       118.86 [deg]
MOON_ILLUM:      21 [%]
GAL_COORDS:      278.84, 27.55 [deg] galactic lon,lat of the burst
ECL_COORDS:      182.60,-32.59 [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 2.8% < P(seren) < 6.6%.

GCN Circular #13466
D.N. Burrows (PSU), J.A. Kennea (PSU), S. Campana (INAF-OAB), G. Cusumano (INAF-IASF PA), P.A. Evans (U. Leicester) and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team:
The XRT began observing the field of GRB 120714A at 08:41:02.2 UT, 3255.5 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source located at RA, Dec 167.98413, -30.62769 which is equivalent to:
```
   RA(J2000)  = 11h 11m 56.19s
   Dec(J2000) = -30d 37' 39.7"
```
with an uncertainty of 4.2 arcseconds (radius, 90% containment). This location is 46 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 6.09 x 10^20 cm^-2 (Kalberla et al. 2005).
GCN Circular #13467
N.P.M. Kuin, S.R. Oates, and C.J. Saxton (UCL/MSSL) report on behalf of the UVOT Team.
Swift UVOT took a finding chart exposure of GRB120714A (Saxton et al., GCN Circ. 13464) of 150 seconds with the White filter starting 3259 seconds after the BAT trigger. No credible afterglow candidate is found in the initial data products. At the XRT position (Burrows et al., GCN Circ. 13466) a 3-sigma upper limit of 20.4 mag. is found.
No correction has been made for the expected extinction corresponding to E(B-V) of 0.06.
GCN Circular #13470
A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team.
Using 2408 s of XRT Photon Counting mode data and 4 UVOT images for GRB 120714A, 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 = 167.98288, -30.62740 which is equivalent to:
```
RA (J2000): 11h 11m 55.89s
Dec (J2000): -30d 37' 38.6"
```
with an uncertainty of 1.8 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 #13472
W. H. Baumgartner (GSFC/UMBC), S. D. Barthelmy (GSFC), J. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (GSFC/UMBC), G. Sato (ISAS), C. J. Saxton (UCL-MSSL), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU) (i.e. the Swift-BAT team):
Using the data set from T-60 to T+243 sec from recent telemetry downlinks, we report further analysis of BAT GRB 120714A (trigger #526593) (Saxton, et al., GCN Circ. 13464). The BAT ground-calculated position is RA, Dec = 167.975, -30.625 deg, which is
```
   RA(J2000)  =  11h 11m 54.1s 
   Dec(J2000) = -30d 37' 29.8" 
```
with an uncertainty of 1.6 arcmin, (radius, sys+stat, 90% containment). The partial coding was 40%.
The mask-weighted light curve shows a single FRED-like pulse starting at ~T-1 sec, peaking at ~T+4 sec, and ending at ~T90 sec. T90 (15-350 keV) is 16.2 +- 4.0 sec (estimated error including systematics).
The time-averaged spectrum from T-0.74 to T+17.78 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.62 +- 0.16. The fluence in the 15-150 keV band is 8.2 +- 0.9 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T+3.58 sec in the 15-150 keV band is 1.5 +- 0.3 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/526593/BA/
GCN Circular #13476
K.L. Page (U. Leicester) and C. J. Saxton (UCL-MSSL) report on behalf of the Swift-XRT team:
We have analysed 16 ks of XRT data for GRB 120714A (Saxton et al. GCN Circ. 13464), from 3.3 ks to 46.3 ks after the BAT trigger. The data comprise 1.2 ks in Windowed Timing (WT) mode with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Beardmore et al. (GCN. Circ 13470).
The light curve can be modelled with a power-law decay with a decay index of alpha=0.77 (+0.18, -0.17).
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 2.9 (+0.5, -0.4). The best-fitting absorption column is 4.1 (+1.4, -1.5) x 10^21 cm^-2, in excess of the Galactic value of 6.1 x 10^20 cm^-2 (Kalberla et al. 2005). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.0 x 10^-11 (1.0 x 10^-10) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     4.1 (+1.4, -1.5) x 10^21 cm^-2
Galactic foreground: 6.1 x 10^20 cm^-2
Excess significance: 3.9 sigma
Photon index:	     2.9 (+0.5, -0.4)
```
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00526593.
This circular is an official product of the Swift-XRT team.
GCN Circular #13479
A. Nicuesa Guelbenzu, S. Klose (both TLS Tautenburg), and J. Greiner (MPE Garching) report on behalf of the GROND team:
We observed the field of GRB 120714A (Swift trigger 526593; Saxton et al., GCN 13464) simultaneously in g'r'i'z'JHKs with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2 m MPG/ESO telescope at La Silla Observatory (Chile).
Observations started at 23:12 UT on 2012-07-14, 15.5 hrs after the GRB trigger, at a airmass of 1.3, and a mean seeing of 1.6". We do not find any source in the XRT error circle (Burrows et al., GCN 13466). Based on an exposure of 1500 seconds in the optical and 1200 seconds in the NIR, at a mean time of 00:00 UT we derive the following upper limits (all AB magnitudes):
```
  g' > 23.9 
  r' > 23.9 
  i' > 23.1 
  z' > 23.1 
  J  > 20.9
  H  > 20.2
  Ks > 19.2.
```
The magnitudes are derived based on GROND zeropoints (g'r'i'z') and 2MASS stars (JHK). We note that the Galactic reddening along the line of sight is E_(B-V)= 0.06 mag (Schlegel et al. 1998).
GCN Circular #13482
N. P. M. Kuin (MSSL-UCL) and C. J. Saxton (UCL-MSSL) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 120714A 3259 s after the BAT trigger (Saxton et al., GCN Circ. 13464).
No optical afterglow consistent with the XRT position (Beardmore etal., GCN Circ. No. 13470) 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          3259         3409          147         >19.9
white             3259        28944         2696         >21.8
v                 3416        21584         2027         >20.4
b                 4237        28344         2135         >21.1
u                 4031        27431         1278         >20.7
w1                3826        23171         1058         >21.0
m2                3621        22489         1279         >21.0
w2                4648        17394         1667         >21.5
```
A possible source was marginally present in the u band during the first two images, but not seen later, nor in any of the other bands.
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.06 in the direction of the burst (Schlegel et al. 1998).

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Jochen Greiner, last update: 15-Jul-2012 [Disclaimer]