Gamma-ray Burst 111129A

(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 29 Nov 11 16:18:42 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     508712,   Seg_Num: 0
GRB_RA:          307.441d {+20h 29m 46s} (J2000),
                 307.662d {+20h 30m 39s} (current),
                 306.507d {+20h 26m 02s} (1950)
GRB_DEC:         -52.724d {-52d 43' 26"} (J2000),
                 -52.684d {-52d 41' 01"} (current),
                 -52.892d {-52d 53' 29"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       3829 [cnts]    Image_Peak=159 [image_cnts]
TRIGGER_DUR:     2.048 [sec] 
TRIGGER_INDEX:   244     E_range: 15-25 keV
BKG_INTEN:       37462 [cnts]
BKG_TIME:        58656.37 SOD {16:17:36.37} UT
BKG_DUR:         24 [sec]
GRB_DATE:        15894 TJD;   333 DOY;   11/11/29
GRB_TIME:        58694.32 SOD {16:18:14.32} UT
GRB_PHI:         -40.02 [deg]
GRB_THETA:        33.79 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     10.19 [sigma]
IMAGE_SIGNIF:    7.34 [sigma]
MERIT_PARAMS:     +1  +0  +0  +1  +0  -3  +0  +0 -55  +0 
SUN_POSTN:       245.27d {+16h 21m 04s}  -21.49d {-21d 29' 29"}
SUN_DIST:         56.44 [deg]   Sun_angle= -4.2 [hr] (East of Sun)
MOON_POSTN:      306.50d {+20h 26m 00s}  -15.03d {-15d 01' 32"}
MOON_DIST:        37.67 [deg]
MOON_ILLUM:      24 [%]
GAL_COORDS:      345.80,-35.95 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      295.92,-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 = 56.73,-8.90 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 29 Nov 11 16:19:53 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     508712,   Seg_Num: 0
POINT_RA:        307.475d {+20h 29m 54s} (J2000)
POINT_DEC:       -52.726d {-52d 43' 32"} (J2000)
IMG_START_DATE:  15894 TJD;   333 DOY;   11/11/29
IMG_START_TIME:  58786.50 SOD {16:19:46.50} UT,   92.2 [sec] since BAT Trigger Time
COUNTS:          4    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 29 Nov 11 16:21:41 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     508712,   Seg_Num: 0
GRB_RA:          307.441d {+20h 29m 46s} (J2000),
                 307.662d {+20h 30m 39s} (current),
                 306.507d {+20h 26m 02s} (1950)
GRB_DEC:         -52.724d {-52d 43' 26"} (J2000),
                 -52.684d {-52d 41' 01"} (current),
                 -52.892d {-52d 53' 29"} (1950)
GRB_DATE:        15894 TJD;   333 DOY;   11/11/29
GRB_TIME:        58694.32 SOD {16:18:14.32} UT
TRIGGER_INDEX:   244
GRB_PHI:         -40.02 [deg]
GRB_THETA:        33.79 [deg]
DELTA_TIME:      45.00 [sec]
TRIGGER_DUR:     2.048 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     10.19 [sigma]
IMAGE_SIGNIF:    7.34 [sigma]
LC_URL:          sw00508712000msb.lc
SUN_POSTN:       245.27d {+16h 21m 05s}  -21.49d {-21d 29' 30"}
SUN_DIST:         56.44 [deg]   Sun_angle= -4.2 [hr] (East of Sun)
MOON_POSTN:      306.53d {+20h 26m 06s}  -15.02d {-15d 01' 03"}
MOON_DIST:        37.68 [deg]
MOON_ILLUM:      24 [%]
GAL_COORDS:      345.80,-35.95 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      295.92,-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 = 56.73,-8.90 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 29 Nov 11 16:22:47 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     508712,   Seg_Num: 0
POINT_RA:        307.474d {+20h 29m 54s} (J2000)
POINT_DEC:       -52.726d {-52d 43' 33"} (J2000)
POINT_ROLL:      278.533d
IMG_START_DATE:  15894 TJD;   333 DOY;   11/11/29
IMG_START_TIME:  58789.92 SOD {16:19:49.92} UT,   95.6 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.416
N_STARS:         76
X_OFFSET:        621 [pixels]
Y_OFFSET:        481 [pixels]
X_MAX:           1580 [pixels]
Y_MAX:           1440 [pixels]
DET_THRESH:      15
PHOTO_THRESH:    8
SL_URL:          sw00508712000msufc0095.fits
SUN_POSTN:       245.27d {+16h 21m 05s}  -21.49d {-21d 29' 30"}
SUN_DIST:         56.46 [deg]   Sun_angle= -4.2 [hr] (East of Sun)
MOON_POSTN:      306.54d {+20h 26m 08s}  -15.01d {-15d 00' 52"}
MOON_DIST:        37.68 [deg]
MOON_ILLUM:      24 [%]
GAL_COORDS:      345.80,-35.97 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      295.94,-32.61 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 29 Nov 11 16:23:11 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     508712,   Seg_Num: 0
POINT_RA:        307.474d {+20h 29m 54s} (J2000)
POINT_DEC:       -52.726d {-52d 43' 33"} (J2000)
POINT_ROLL:      278.533d
IMG_START_DATE:  15894 TJD;   333 DOY;   11/11/29
IMG_START_TIME:  58789.92 SOD {16:19:49.92} UT,   95.6 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.416
N_STARS:         76
X_OFFSET:        621 [pixels]
Y_OFFSET:        481 [pixels]
X_MAX:           1580 [pixels]
Y_MAX:           1440 [pixels]
DET_THRESH:      15
PHOTO_THRESH:    8
SL_URL:          sw00508712000msufc0095.fits
SUN_POSTN:       245.27d {+16h 21m 05s}  -21.49d {-21d 29' 31"}
SUN_DIST:         56.46 [deg]   Sun_angle= -4.2 [hr] (East of Sun)
MOON_POSTN:      306.54d {+20h 26m 09s}  -15.01d {-15d 00' 48"}
MOON_DIST:        37.68 [deg]
MOON_ILLUM:      24 [%]
GAL_COORDS:      345.80,-35.97 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      295.94,-32.61 [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 29 Nov 11 16:24:10 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     508712,   Seg_Num: 0
POINT_RA:        307.474d {+20h 29m 54s} (J2000)
POINT_DEC:       -52.726d {-52d 43' 33"} (J2000)
ROLL:            278.533d
IMG_START_DATE:  15894 TJD;   333 DOY;   11/11/29
IMG_START_TIME:  58789.92 SOD {16:19:49.92} UT,   95.6 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     344276397
X_OFFSET:        940 [pixels]
Y_OFFSET:        800 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1100
Y_GRB_POS:       960
BINNING_INDEX:   1
IM_URL:          sw00508712000msuni0103.fits
SUN_POSTN:       245.27d {+16h 21m 05s}  -21.49d {-21d 29' 31"}
SUN_DIST:         56.46 [deg]   Sun_angle= -4.2 [hr] (East of Sun)
MOON_POSTN:      306.55d {+20h 26m 12s}  -15.01d {-15d 00' 39"}
MOON_DIST:        37.69 [deg]
MOON_ILLUM:      24 [%]
GAL_COORDS:      345.80,-35.97 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      295.94,-32.61 [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 29 Nov 11 16:24:27 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     508712,   Seg_Num: 0
POINT_RA:        307.474d {+20h 29m 54s} (J2000)
POINT_DEC:       -52.726d {-52d 43' 33"} (J2000)
ROLL:            278.533d
IMG_START_DATE:  15894 TJD;   333 DOY;   11/11/29
IMG_START_TIME:  58789.92 SOD {16:19:49.92} UT,   95.6 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     344276397
X_OFFSET:        940 [pixels]
Y_OFFSET:        800 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1100
Y_GRB_POS:       960
BINNING_INDEX:   1
IM_URL:          sw00508712000msuni0103.fits
SUN_POSTN:       245.27d {+16h 21m 05s}  -21.49d {-21d 29' 31"}
SUN_DIST:         56.46 [deg]   Sun_angle= -4.2 [hr] (East of Sun)
MOON_POSTN:      306.55d {+20h 26m 12s}  -15.01d {-15d 00' 36"}
MOON_DIST:        37.69 [deg]
MOON_ILLUM:      24 [%]
GAL_COORDS:      345.80,-35.97 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      295.94,-32.61 [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 29 Nov 11 16:24:29 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     508712,   Seg_Num: 0
GRB_RA:          307.4345d {+20h 29m 44.28s} (J2000),
                 307.6561d {+20h 30m 37.46s} (current),
                 306.5010d {+20h 26m 00.23s} (1950)
GRB_DEC:         -52.7130d {-52d 42' 46.8"} (J2000),
                 -52.6726d {-52d 40' 21.3"} (current),
                 -52.8804d {-52d 52' 49.5"} (1950)
GRB_ERROR:       3.7 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  15894 TJD;   333 DOY;   11/11/29
IMG_START_TIME:  58800.00 SOD {16:20:00.00} UT,   105.7 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       245.27d {+16h 21m 05s}  -21.49d {-21d 29' 31"}
SUN_DIST:         56.44 [deg]   Sun_angle= -4.2 [hr] (East of Sun)
MOON_POSTN:      306.55d {+20h 26m 12s}  -15.01d {-15d 00' 36"}
MOON_DIST:        37.67 [deg]
MOON_ILLUM:      24 [%]
GAL_COORDS:      345.82,-35.95 [deg] galactic lon,lat of the burst
ECL_COORDS:      295.92,-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 0.58% < P(seren) < 1.1%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 29 Nov 11 16:25:55 UT
NOTICE_TYPE:     Swift-UVOT Position
TRIGGER_NUM:     508712,   Seg_Num: 0
GRB_RA:          307.4339d {+20h 29m 44.13s} (J2000),
                 307.6555d {+20h 30m 37.31s} (current),
                 306.5004d {+20h 26m 00.08s} (1950)
GRB_DEC:         -52.7129d {-52d 42' 46.4"} (J2000),
                 -52.6725d {-52d 40' 20.9"} (current),
                 -52.8803d {-52d 52' 49.1"} (1950)
GRB_ERROR:       0.6 [arcsec radius, statistical only]
GRB_MAG:         19.05 +/- 0.14 [mag]
FILTER:          10, White
IMG_START_DATE:  15894 TJD;   333 DOY;   11/11/29
IMG_START_TIME:  58789.00 SOD {16:19:49.00} UT,   94.7 [sec] since BAT Trigger Time
SUN_POSTN:       245.27d {+16h 21m 05s}  -21.49d {-21d 29' 32"}
SUN_DIST:         56.44 [deg]   Sun_angle= -4.2 [hr] (East of Sun)
MOON_POSTN:      306.56d {+20h 26m 15s}  -15.01d {-15d 00' 22"}
MOON_DIST:        37.68 [deg]
MOON_ILLUM:      24 [%]
GAL_COORDS:      345.82,-35.95 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      295.92,-32.59 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT UVOT Position Notice.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        Result based on Genie data.  
COMMENTS:        Notice generated automatically.

GCN Circular #12600
J. L. Racusin (NASA/GSFC), S. D. Barthelmy (GSFC), A. P. Beardmore (U Leicester), D. N. Burrows (PSU), S. Campana (INAF-OAB), P. A. Evans (U Leicester), S. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU), N. P. M. Kuin (UCL-MSSL), O. M. Littlejohns (U Leicester), C. B. Markwardt (NASA/GSFC), F. E. Marshall (NASA/GSFC), K. L. Page (U Leicester), D. M. Palmer (LANL), C. J. Saxton (UCL-MSSL), B. Sbarufatti (INAF-OAB/PSU), M. H. Siegel (PSU), M. C. Stroh (PSU), C. A. Swenson (PSU), E. Troja (NASA/GSFC/ORAU) and B.-B. Zhang (PSU) report on behalf of the Swift Team:
At 16:18:14 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 111129A (trigger=508712). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 307.441, -52.724, which is
```
   RA(J2000)  =  20h 29m 46s
   Dec(J2000) = -52d 43' 26"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a few weak peaks with a total duration of about 20 sec. The peak count rate was ~800 counts/sec (15-350 keV), at ~0 sec after the trigger.
The XRT began observing the field at 16:19:46.5 UT, 92.2 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source located at RA, Dec 307.43460, -52.71300 which is equivalent to:
```
   RA(J2000)  = 20h 29m 44.30s
   Dec(J2000) = -52d 42' 46.8"
```
with an uncertainty of 3.7 arcseconds (radius, 90% containment). This location is 42 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 3.24 x 10^20 cm^-2 (Kalberla et al. 2005).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 95 seconds after the BAT trigger. There is a candidate afterglow in the rapidly available 2.7'x2.7' sub-image at
```
  RA(J2000)  =	20:29:44.15 = 307.43395
  DEC(J2000) = -52:42:46.5  = -52.71291
```
with a 90%-confidence error radius of about 0.64 arc sec. This position is 1.4 arc sec. from the center of the XRT error circle. The estimated magnitude is 19.06 with a 1-sigma error of about 0.15. No correction has been made for the expected extinction corresponding to E(B-V) of 0.04.
Burst Advocate for this burst is J. L. Racusin (judith.racusin AT 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 NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 29 Nov 11 16:44:42 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     508712,   Seg_Num: 0
POINT_RA:        307.477d {+20h 29m 55s} (J2000)
POINT_DEC:       -52.728d {-52d 43' 41"} (J2000)
POINT_ROLL:      278.532d
IMG_START_DATE:  15894 TJD;   333 DOY;   11/11/29
IMG_START_TIME:  58947.85 SOD {16:22:27.85} UT,   253.5 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.933
N_STARS:         146
X_OFFSET:        381 [pixels]
Y_OFFSET:        241 [pixels]
X_MAX:           1820 [pixels]
Y_MAX:           1680 [pixels]
DET_THRESH:      8
PHOTO_THRESH:    4
SL_URL:          sw00508712000msufc0253.fits
SUN_POSTN:       245.29d {+16h 21m 09s}  -21.49d {-21d 29' 40"}
SUN_DIST:         56.45 [deg]   Sun_angle= -4.2 [hr] (East of Sun)
MOON_POSTN:      306.73d {+20h 26m 56s}  -14.96d {-14d 57' 18"}
MOON_DIST:        37.74 [deg]
MOON_ILLUM:      24 [%]
GAL_COORDS:      345.80,-35.97 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      295.94,-32.61 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 29 Nov 11 16:45:05 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     508712,   Seg_Num: 0
POINT_RA:        307.477d {+20h 29m 55s} (J2000)
POINT_DEC:       -52.728d {-52d 43' 41"} (J2000)
POINT_ROLL:      278.532d
IMG_START_DATE:  15894 TJD;   333 DOY;   11/11/29
IMG_START_TIME:  58947.85 SOD {16:22:27.85} UT,   253.5 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.933
N_STARS:         146
X_OFFSET:        381 [pixels]
Y_OFFSET:        241 [pixels]
X_MAX:           1820 [pixels]
Y_MAX:           1680 [pixels]
DET_THRESH:      8
PHOTO_THRESH:    4
SL_URL:          sw00508712000msufc0253.fits
SUN_POSTN:       245.29d {+16h 21m 09s}  -21.49d {-21d 29' 40"}
SUN_DIST:         56.45 [deg]   Sun_angle= -4.2 [hr] (East of Sun)
MOON_POSTN:      306.74d {+20h 26m 57s}  -14.95d {-14d 57' 14"}
MOON_DIST:        37.74 [deg]
MOON_ILLUM:      24 [%]
GAL_COORDS:      345.80,-35.97 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      295.94,-32.61 [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 29 Nov 11 16:45:21 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     508712,   Seg_Num: 0
GRB_RA:          307.4345d {+20h 29m 44.28s} (J2000),
                 307.6561d {+20h 30m 37.46s} (current),
                 306.5010d {+20h 26m 00.23s} (1950)
GRB_DEC:         -52.7135d {-52d 42' 48.6"} (J2000),
                 -52.6731d {-52d 40' 23.1"} (current),
                 -52.8809d {-52d 52' 51.3"} (1950)
GRB_ERROR:       2.1 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  15894 TJD;   333 DOY;   11/11/29
IMG_START_TIME:  58800.00 SOD {16:20:00.00} UT,   105.7 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       245.29d {+16h 21m 09s}  -21.49d {-21d 29' 40"}
SUN_DIST:         56.43 [deg]   Sun_angle= -4.2 [hr] (East of Sun)
MOON_POSTN:      306.74d {+20h 26m 58s}  -14.95d {-14d 57' 11"}
MOON_DIST:        37.73 [deg]
MOON_ILLUM:      24 [%]
GAL_COORDS:      345.82,-35.95 [deg] galactic lon,lat of the burst
ECL_COORDS:      295.92,-32.59 [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 NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 29 Nov 11 16:46:03 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     508712,   Seg_Num: 0
POINT_RA:        307.477d {+20h 29m 55s} (J2000)
POINT_DEC:       -52.728d {-52d 43' 41"} (J2000)
ROLL:            278.532d
IMG_START_DATE:  15894 TJD;   333 DOY;   11/11/29
IMG_START_TIME:  58947.85 SOD {16:22:27.85} UT,   253.5 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     344276555
X_OFFSET:        940 [pixels]
Y_OFFSET:        800 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1100
Y_GRB_POS:       960
BINNING_INDEX:   1
IM_URL:          sw00508712000msuni0261.fits
SUN_POSTN:       245.29d {+16h 21m 09s}  -21.49d {-21d 29' 40"}
SUN_DIST:         56.45 [deg]   Sun_angle= -4.2 [hr] (East of Sun)
MOON_POSTN:      306.75d {+20h 26m 59s}  -14.95d {-14d 57' 04"}
MOON_DIST:        37.74 [deg]
MOON_ILLUM:      24 [%]
GAL_COORDS:      345.80,-35.97 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      295.94,-32.61 [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 29 Nov 11 16:46:23 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     508712,   Seg_Num: 0
POINT_RA:        307.477d {+20h 29m 55s} (J2000)
POINT_DEC:       -52.728d {-52d 43' 41"} (J2000)
ROLL:            278.532d
IMG_START_DATE:  15894 TJD;   333 DOY;   11/11/29
IMG_START_TIME:  58947.85 SOD {16:22:27.85} UT,   253.5 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     344276555
X_OFFSET:        940 [pixels]
Y_OFFSET:        800 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1100
Y_GRB_POS:       960
BINNING_INDEX:   1
IM_URL:          sw00508712000msuni0261.fits
SUN_POSTN:       245.29d {+16h 21m 09s}  -21.49d {-21d 29' 40"}
SUN_DIST:         56.45 [deg]   Sun_angle= -4.2 [hr] (East of Sun)
MOON_POSTN:      306.75d {+20h 27m 00s}  -14.95d {-14d 57' 01"}
MOON_DIST:        37.74 [deg]
MOON_ILLUM:      24 [%]
GAL_COORDS:      345.80,-35.97 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      295.94,-32.61 [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 #12601
J.P. Osborne, A.P. Beardmore, P.A. Evans and M.R. Goad (U. Leicester) report on behalf of the Swift-XRT team.
Using 809 s of XRT Photon Counting mode data and 1 UVOT images for GRB 111129A, 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 = 307.43385, -52.71297 which is equivalent to:
```
RA (J2000): 20h 29m 44.12s
Dec (J2000): -52d 42' 46.7"
```
with an uncertainty of 1.9 arcsec (radius, 90% confidence).
This position may be improved as more data are received. The latest position can be viewed at http://www.swift.ac.uk/xrt_positions. Position enhancement is described by Goad et al. (2007, A&A, 476, 1401) and Evans et al. (2009, MNRAS, 397, 1177).
This circular was automatically generated, and is an official product of the Swift-XRT team.
GCN Circular #12602
S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC), D. M. Palmer (LANL), J. L. Racusin (NASA/GSFC), T. Sakamoto (GSFC/UMBC), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU) (i.e. the Swift-BAT team):
Using the data set from T-61 to T+242 sec from recent telemetry downlinks, we report further analysis of BAT GRB 111129A (trigger #508712) (Racusin, et al., GCN Circ. 12600). The BAT ground-calculated position is RA, Dec = 307.415, -52.722 deg, which is
```
   RA(J2000)  =  20h 29m 39.5s 
   Dec(J2000) = -52d 43' 20.9" 
```
with an uncertainty of 2.3 arcmin, (radius, sys+stat, 90% containment). The partial coding was 61%.
The mask-weighted light curve shows two slightly overlapping peaks starting at ~T-7 sec, peaking at ~T-5 and T+1 sec, and ending at ~T+10 sec. T90 (15-350 keV) is 7.6 +- 1.4 sec (estimated error including systematics).
The time-averaged spectrum from T-6.29 to T+2.88 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 2.56 +- 0.38. The fluence in the 15-150 keV band is 1.8 +- 0.4 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T+0.41 sec in the 15-150 keV band is 0.9 +- 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/508712/BA/
GCN Circular #12604
J.A. Kennea (PSU), M.C. Stroh (PSU), D.N. Burrows (PSU), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), C. Pagani (U. Leicester), P. D'Avanzo (INAF-OAB), V. D'Elia (ASDC), V. Mangano (INAF-IASFPA) and J.L. Racusin report on behalf of the Swift-XRT team:
We have analysed 9.2 ks of XRT data for GRB 111129A (Racusin et al. GCN Circ. 12600), from 77 s to 34.7 ks after the BAT trigger. The data comprise 26 s in Windowed Timing (WT) mode (the first 8 s were taken while Swift was slewing) with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Osborne et al. (GCN. Circ 12601).
The light curve can be modelled with an initial power-law decay with an index of alpha=0.57 (+0.16, -0.17), followed by a break at T+3006 s to an alpha of 1.19 (+0.12, -0.11).
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 1.93 (+/-0.08). The best-fitting absorption column is 1.72 (+0.40, -0.24) x 10^21 cm^-2, in excess of the Galactic value of 3.2 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 4.0 x 10^-11 (5.4 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     1.72 (+0.40, -0.24) x 10^21 cm^-2
Galactic foreground: 3.2 x 10^20 cm^-2
Excess significance: 11.6 sigma
Photon index:	     1.93 (+/-0.08)
```
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00508712.
This circular is an official product of the Swift-XRT team.
GCN Circular #12605
A. Rossi, A. Nicuesa Guelbenzu (all Tautenburg) and J. Greiner (MPE) report on behalf of the GROND team:
We observed the field of GRB 111129A (Racusin, GCN 12600) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2-m MPI/ESO telescope on La Silla.
Observations started at 00:30 UT on November 30, about 8.2 hr after the burst, and continued for about 2 hrs. They were performed at an average seeing of 1 arcsec and an average airmass of 1.8.
We detect the afterglow discovered by Racusin et al. (GCN 12600) in the optical/NIR. At a mean time of November 30, 01:31 UT (9.25 hours after the trigger) with exporures times of 24.3 minutes in griz and 20 min in JHK, we measure the following preliminary magnitudes (AB system):
```
   g' = 22.9  +/- 0.1,
   r' = 22.3  +/- 0.1,
   i' = 21.8  +/- 0.1,
   z' = 21.3  +/- 0.1,
   J  = 20.5  +/- 0.2,
   H  = 19.8  +/- 0.2,
   K  = 19.1  +/- 0.3
```
Optical data are calibrated against GROND zeropoints and NIR against 2MASS field stars.
GCN Circular #12606
A. A. Breeveld (MSSL-UCL) and J. L. Racusin (NASA/GSFC) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 111129A 96 s after the BAT trigger (Racusin et al., GCN Circ. 12600). A source consistent with the XRT position (Osborne et al., GCN Circ. 12601) is detected in the initial UVOT exposures in the white and u filters. The source had already faded by the time the other filters were used.
The preliminary UVOT position is:
```
     RA  (J2000) =3D  20:29:44.15 =3D 307.43396 (deg.)
     Dec (J2000) =3D -52:42:46.5  =3D -52.71293 (deg.)
```
with an estimated uncertainty of 0.54 arc sec. (radius, 90% confidence).
Preliminary detections and 3-sigma upper limits using the UVOT=20 photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the early exposures are:
```
Filter         T_start(s)   T_stop(s)      Exp(s)           Mag

white               96          245          147         19.11 =B1 0.1
white              534          726           39        >20.32
v                  584        12305          524        >19.9
b                  509        16631         1223        >21.3
u                  254          503          246         19.10 +- 0.16
w1                 633        22753         1296        >21.2
m2                 608         6008          413        >20.4
w2                 559        12186         1120        >21.5
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) =3D 0.04 in the direction of the burst (Schlegel et al. 1998).
arXiv:1505.06743 X-shooter redshift: 1.0796

Back to JG's homepage

Jochen Greiner, last update: 25-Jun-2015 [Disclaimer]