Gamma-ray Burst 120729A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 29 Jul 12 10:56:38 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     529095,   Seg_Num: 0
GRB_RA:           13.056d {+00h 52m 13s} (J2000),
                  13.236d {+00h 52m 57s} (current),
                  12.343d {+00h 49m 22s} (1950)
GRB_DEC:         +49.940d {+49d 56' 23"} (J2000),
                 +50.008d {+50d 00' 29"} (current),
                 +49.668d {+49d 40' 06"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       6638 [cnts]    Image_Peak=720 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   146     E_range: 25-100 keV
BKG_INTEN:       27825 [cnts]
BKG_TIME:        39358.52 SOD {10:55:58.52} UT
BKG_DUR:         8 [sec]
GRB_DATE:        16137 TJD;   211 DOY;   12/07/29
GRB_TIME:        39374.07 SOD {10:56:14.07} UT
GRB_PHI:         -81.42 [deg]
GRB_THETA:        19.11 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     48.53 [sigma]
IMAGE_SIGNIF:    19.36 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +2  +6  +0  +0  +2  +0 
SUN_POSTN:       129.11d {+08h 36m 27s}  +18.59d {+18d 35' 29"}
SUN_DIST:         91.24 [deg]   Sun_angle= 7.7 [hr] (West of Sun)
MOON_POSTN:      256.80d {+17h 07m 11s}  -21.49d {-21d 29' 30"}
MOON_DIST:       123.16 [deg]
MOON_ILLUM:      83 [%]
GAL_COORDS:      123.06,-12.93 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       34.93, 40.12 [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 = 308.96,16.29 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 29 Jul 12 10:58:10 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     529095,   Seg_Num: 0
GRB_RA:           13.0721d {+00h 52m 17.30s} (J2000),
                  13.2522d {+00h 53m 00.52s} (current),
                  12.3591d {+00h 49m 26.17s} (1950)
GRB_DEC:         +49.9368d {+49d 56' 12.4"} (J2000),
                 +50.0050d {+50d 00' 17.8"} (current),
                 +49.6652d {+49d 39' 54.7"} (1950)
GRB_ERROR:       5.2 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.75e-09 [erg/cm2/sec]
GRB_SIGNIF:      7.74 [sigma]
IMG_START_DATE:  16137 TJD;   211 DOY;   12/07/29
IMG_START_TIME:  39442.22 SOD {10:57:22.22} UT,   68.2 [sec] since BAT Trigger Time
TAM[0-3]:        327.62 237.22 261.46 243.35
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       129.11d {+08h 36m 27s}  +18.59d {+18d 35' 28"}
SUN_DIST:         91.23 [deg]   Sun_angle= 7.7 [hr] (West of Sun)
MOON_POSTN:      256.81d {+17h 07m 15s}  -21.49d {-21d 29' 30"}
MOON_DIST:       123.16 [deg]
MOON_ILLUM:      83 [%]
GAL_COORDS:      123.07,-12.93 [deg] galactic lon,lat of the burst
ECL_COORDS:       34.94, 40.11 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 0.65 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 29 Jul 12 10:58:31 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     529095,   Seg_Num: 0
GRB_RA:           13.0721d {+00h 52m 17.3s} (J2000),
                  13.2522d {+00h 53m 00.5s} (current),
                  12.3591d {+00h 49m 26.1s} (1950)
GRB_DEC:         +49.9368d {+49d 56' 12.4"} (J2000),
                 +50.0050d {+50d 00' 17.8"} (current),
                 +49.6652d {+49d 39' 54.7"} (1950)
GRB_ERROR:       5.0 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       60 [cnts]
IMG_START_DATE:  16137 TJD;   211 DOY;   12/07/29
IMG_START_TIME:  39442.22 SOD {10:57:22.22} UT,   68.2 [sec] since BAT Trigger Time
CENTROID_X:      260.43,  raw= 260  [pixels]
CENTROID_Y:      279.85,  raw= 280  [pixels]
ROLL:            58.37 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -42.76
GRB_POS_XRT_Z:   -101.99
IMAGE_URL:       sw00529095000msxps_rw.img
SUN_POSTN:       129.11d {+08h 36m 27s}  +18.59d {+18d 35' 28"}
SUN_DIST:         91.23 [deg]   Sun_angle= 7.7 [hr] (West of Sun)
MOON_POSTN:      256.82d {+17h 07m 16s}  -21.49d {-21d 29' 31"}
MOON_DIST:       123.16 [deg]
MOON_ILLUM:      83 [%]
GAL_COORDS:      123.07,-12.93 [deg] galactic lon,lat of the burst
ECL_COORDS:       34.94, 40.11 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 29 Jul 12 10:58:37 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     529095,   Seg_Num: 0
GRB_RA:           13.0721d {+00h 52m 17.3s} (J2000),
                  13.2522d {+00h 53m 00.5s} (current),
                  12.3591d {+00h 49m 26.1s} (1950)
GRB_DEC:         +49.9368d {+49d 56' 12.4"} (J2000),
                 +50.0050d {+50d 00' 17.8"} (current),
                 +49.6652d {+49d 39' 54.7"} (1950)
GRB_ERROR:       5.0 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       60 [cnts]
IMG_START_DATE:  16137 TJD;   211 DOY;   12/07/29
IMG_START_TIME:  39442.22 SOD {10:57:22.22} UT,   68.2 [sec] since BAT Trigger Time
CENTROID_X:      260.43,  raw= 260  [pixels]
CENTROID_Y:      279.85,  raw= 280  [pixels]
ROLL:            58.37 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -42.76
GRB_POS_XRT_Z:   -101.99
IMAGE_URL:       sw00529095000msxps_rw.img
SUN_POSTN:       129.11d {+08h 36m 27s}  +18.59d {+18d 35' 28"}
SUN_DIST:         91.23 [deg]   Sun_angle= 7.7 [hr] (West of Sun)
MOON_POSTN:      256.82d {+17h 07m 16s}  -21.49d {-21d 29' 31"}
MOON_DIST:       123.16 [deg]
MOON_ILLUM:      83 [%]
GAL_COORDS:      123.07,-12.93 [deg] galactic lon,lat of the burst
ECL_COORDS:       34.94, 40.11 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 29 Jul 12 11:00:12 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     529095,   Seg_Num: 0
GRB_RA:           13.056d {+00h 52m 13s} (J2000),
                  13.236d {+00h 52m 57s} (current),
                  12.343d {+00h 49m 22s} (1950)
GRB_DEC:         +49.940d {+49d 56' 23"} (J2000),
                 +50.008d {+50d 00' 29"} (current),
                 +49.668d {+49d 40' 06"} (1950)
GRB_DATE:        16137 TJD;   211 DOY;   12/07/29
GRB_TIME:        39374.07 SOD {10:56:14.07} UT
TRIGGER_INDEX:   146
GRB_PHI:         -81.42 [deg]
GRB_THETA:        19.11 [deg]
DELTA_TIME:      45.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     48.53 [sigma]
IMAGE_SIGNIF:    19.36 [sigma]
LC_URL:          sw00529095000msb.lc
SUN_POSTN:       129.11d {+08h 36m 28s}  +18.59d {+18d 35' 27"}
SUN_DIST:         91.24 [deg]   Sun_angle= 7.7 [hr] (West of Sun)
MOON_POSTN:      256.83d {+17h 07m 20s}  -21.49d {-21d 29' 31"}
MOON_DIST:       123.13 [deg]
MOON_ILLUM:      83 [%]
GAL_COORDS:      123.06,-12.93 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       34.93, 40.12 [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 = 308.96,16.29 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 29 Jul 12 11:00:38 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     529095,   Seg_Num: 0
POINT_RA:         13.027d {+00h 52m 06s} (J2000)
POINT_DEC:       +49.932d {+49d 55' 57"} (J2000)
POINT_ROLL:      58.376d
IMG_START_DATE:  16137 TJD;   211 DOY;   12/07/29
IMG_START_TIME:  39451.33 SOD {10:57:31.33} UT,   77.3 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.691
N_STARS:         145
X_OFFSET:        640 [pixels]
Y_OFFSET:        504 [pixels]
X_MAX:           1599 [pixels]
Y_MAX:           1463 [pixels]
DET_THRESH:      16
PHOTO_THRESH:    9
SL_URL:          sw00529095000msufc0077.fits
SUN_POSTN:       129.12d {+08h 36m 28s}  +18.59d {+18d 35' 26"}
SUN_DIST:         91.26 [deg]   Sun_angle= 7.7 [hr] (West of Sun)
MOON_POSTN:      256.84d {+17h 07m 21s}  -21.49d {-21d 29' 31"}
MOON_DIST:       123.11 [deg]
MOON_ILLUM:      83 [%]
GAL_COORDS:      123.04,-12.94 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       34.90, 40.12 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 29 Jul 12 11:01:04 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     529095,   Seg_Num: 0
POINT_RA:         13.027d {+00h 52m 06s} (J2000)
POINT_DEC:       +49.932d {+49d 55' 57"} (J2000)
POINT_ROLL:      58.376d
IMG_START_DATE:  16137 TJD;   211 DOY;   12/07/29
IMG_START_TIME:  39451.33 SOD {10:57:31.33} UT,   77.3 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.691
N_STARS:         145
X_OFFSET:        640 [pixels]
Y_OFFSET:        504 [pixels]
X_MAX:           1599 [pixels]
Y_MAX:           1463 [pixels]
DET_THRESH:      16
PHOTO_THRESH:    9
SL_URL:          sw00529095000msufc0077.fits
SUN_POSTN:       129.12d {+08h 36m 28s}  +18.59d {+18d 35' 26"}
SUN_DIST:         91.26 [deg]   Sun_angle= 7.7 [hr] (West of Sun)
MOON_POSTN:      256.84d {+17h 07m 22s}  -21.49d {-21d 29' 31"}
MOON_DIST:       123.11 [deg]
MOON_ILLUM:      83 [%]
GAL_COORDS:      123.04,-12.94 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       34.90, 40.12 [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:     Sun 29 Jul 12 11:02:28 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     529095,   Seg_Num: 0
POINT_RA:         13.027d {+00h 52m 06s} (J2000)
POINT_DEC:       +49.932d {+49d 55' 57"} (J2000)
ROLL:            58.376d
IMG_START_DATE:  16137 TJD;   211 DOY;   12/07/29
IMG_START_TIME:  39451.33 SOD {10:57:31.33} UT,   77.3 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     365252260
X_OFFSET:        1031 [pixels]
Y_OFFSET:        843 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1191
Y_GRB_POS:       1003
BINNING_INDEX:   1
IM_URL:          sw00529095000msuni0087.fits
SUN_POSTN:       129.12d {+08h 36m 28s}  +18.59d {+18d 35' 25"}
SUN_DIST:         91.26 [deg]   Sun_angle= 7.7 [hr] (West of Sun)
MOON_POSTN:      256.86d {+17h 07m 26s}  -21.49d {-21d 29' 31"}
MOON_DIST:       123.10 [deg]
MOON_ILLUM:      83 [%]
GAL_COORDS:      123.04,-12.94 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       34.90, 40.12 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 29 Jul 12 11:02:45 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     529095,   Seg_Num: 0
POINT_RA:         13.027d {+00h 52m 06s} (J2000)
POINT_DEC:       +49.932d {+49d 55' 57"} (J2000)
ROLL:            58.376d
IMG_START_DATE:  16137 TJD;   211 DOY;   12/07/29
IMG_START_TIME:  39451.33 SOD {10:57:31.33} UT,   77.3 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     365252260
X_OFFSET:        1031 [pixels]
Y_OFFSET:        843 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1191
Y_GRB_POS:       1003
BINNING_INDEX:   1
IM_URL:          sw00529095000msuni0087.fits
SUN_POSTN:       129.12d {+08h 36m 28s}  +18.59d {+18d 35' 25"}
SUN_DIST:         91.26 [deg]   Sun_angle= 7.7 [hr] (West of Sun)
MOON_POSTN:      256.86d {+17h 07m 27s}  -21.49d {-21d 29' 31"}
MOON_DIST:       123.10 [deg]
MOON_ILLUM:      83 [%]
GAL_COORDS:      123.04,-12.94 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       34.90, 40.12 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 29 Jul 12 11:04:39 UT
NOTICE_TYPE:     Swift-UVOT Position
TRIGGER_NUM:     529095,   Seg_Num: 0
GRB_RA:           13.0743d {+00h 52m 17.83s} (J2000),
                  13.2544d {+00h 53m 01.05s} (current),
                  12.3612d {+00h 49m 26.69s} (1950)
GRB_DEC:         +49.9397d {+49d 56' 22.9"} (J2000),
                 +50.0079d {+50d 00' 28.3"} (current),
                 +49.6681d {+49d 40' 05.2"} (1950)
GRB_ERROR:       0.6 [arcsec radius, statistical only]
GRB_MAG:         15.26 +/- 0.14 [mag]
FILTER:          10, White
IMG_START_DATE:  16137 TJD;   211 DOY;   12/07/29
IMG_START_TIME:  39451.00 SOD {10:57:31.00} UT,   76.9 [sec] since BAT Trigger Time
SUN_POSTN:       129.12d {+08h 36m 28s}  +18.59d {+18d 35' 24"}
SUN_DIST:         91.23 [deg]   Sun_angle= 7.7 [hr] (West of Sun)
MOON_POSTN:      256.88d {+17h 07m 32s}  -21.49d {-21d 29' 32"}
MOON_DIST:       123.12 [deg]
MOON_ILLUM:      83 [%]
GAL_COORDS:      123.07,-12.93 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       34.94, 40.11 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT UVOT Position Notice.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        The UVOT position is 11.5 arcsec from the XRT position.  
COMMENTS:        Result based on Genie data.  
COMMENTS:        Notice generated automatically.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 29 Jul 12 11:09:30 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     529095,   Seg_Num: 0
POINT_RA:         13.022d {+00h 52m 05s} (J2000)
POINT_DEC:       +49.931d {+49d 55' 51"} (J2000)
POINT_ROLL:      58.372d
IMG_START_DATE:  16137 TJD;   211 DOY;   12/07/29
IMG_START_TIME:  39663.36 SOD {11:01:03.36} UT,   289.3 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        2.060
N_STARS:         77
X_OFFSET:        711 [pixels]
Y_OFFSET:        523 [pixels]
X_MAX:           1670 [pixels]
Y_MAX:           1482 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00529095000msufc0289.fits
SUN_POSTN:       129.12d {+08h 36m 29s}  +18.59d {+18d 35' 21"}
SUN_DIST:         91.27 [deg]   Sun_angle= 7.7 [hr] (West of Sun)
MOON_POSTN:      256.93d {+17h 07m 44s}  -21.49d {-21d 29' 33"}
MOON_DIST:       123.05 [deg]
MOON_ILLUM:      83 [%]
GAL_COORDS:      123.04,-12.94 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       34.90, 40.12 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 29 Jul 12 11:09:51 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     529095,   Seg_Num: 0
POINT_RA:         13.022d {+00h 52m 05s} (J2000)
POINT_DEC:       +49.931d {+49d 55' 51"} (J2000)
POINT_ROLL:      58.372d
IMG_START_DATE:  16137 TJD;   211 DOY;   12/07/29
IMG_START_TIME:  39663.36 SOD {11:01:03.36} UT,   289.3 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        2.060
N_STARS:         77
X_OFFSET:        711 [pixels]
Y_OFFSET:        523 [pixels]
X_MAX:           1670 [pixels]
Y_MAX:           1482 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00529095000msufc0289.fits
SUN_POSTN:       129.12d {+08h 36m 29s}  +18.59d {+18d 35' 21"}
SUN_DIST:         91.27 [deg]   Sun_angle= 7.7 [hr] (West of Sun)
MOON_POSTN:      256.94d {+17h 07m 45s}  -21.49d {-21d 29' 33"}
MOON_DIST:       123.05 [deg]
MOON_ILLUM:      83 [%]
GAL_COORDS:      123.04,-12.94 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       34.90, 40.12 [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:     Sun 29 Jul 12 11:09:57 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     529095,   Seg_Num: 0
GRB_RA:           13.0745d {+00h 52m 17.88s} (J2000),
                  13.2546d {+00h 53m 01.10s} (current),
                  12.3614d {+00h 49m 26.74s} (1950)
GRB_DEC:         +49.9401d {+49d 56' 24.3"} (J2000),
                 +50.0083d {+50d 00' 29.7"} (current),
                 +49.6685d {+49d 40' 06.6"} (1950)
GRB_ERROR:       2.4 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  16137 TJD;   211 DOY;   12/07/29
IMG_START_TIME:  39628.00 SOD {11:00:28.00} UT,   253.9 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       129.12d {+08h 36m 29s}  +18.59d {+18d 35' 21"}
SUN_DIST:         91.23 [deg]   Sun_angle= 7.7 [hr] (West of Sun)
MOON_POSTN:      256.94d {+17h 07m 45s}  -21.49d {-21d 29' 33"}
MOON_DIST:       123.08 [deg]
MOON_ILLUM:      83 [%]
GAL_COORDS:      123.07,-12.93 [deg] galactic lon,lat of the burst
ECL_COORDS:       34.94, 40.11 [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:     Sun 29 Jul 12 11:10:57 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     529095,   Seg_Num: 0
POINT_RA:         13.022d {+00h 52m 05s} (J2000)
POINT_DEC:       +49.931d {+49d 55' 51"} (J2000)
ROLL:            58.372d
IMG_START_DATE:  16137 TJD;   211 DOY;   12/07/29
IMG_START_TIME:  39663.36 SOD {11:01:03.36} UT,   289.3 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     365252472
X_OFFSET:        1031 [pixels]
Y_OFFSET:        843 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1191
Y_GRB_POS:       1003
BINNING_INDEX:   1
IM_URL:          sw00529095000msuni0299.fits
SUN_POSTN:       129.12d {+08h 36m 29s}  +18.59d {+18d 35' 20"}
SUN_DIST:         91.27 [deg]   Sun_angle= 7.7 [hr] (West of Sun)
MOON_POSTN:      256.95d {+17h 07m 48s}  -21.49d {-21d 29' 33"}
MOON_DIST:       123.04 [deg]
MOON_ILLUM:      83 [%]
GAL_COORDS:      123.04,-12.94 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       34.90, 40.12 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 29 Jul 12 11:11:11 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     529095,   Seg_Num: 0
POINT_RA:         13.022d {+00h 52m 05s} (J2000)
POINT_DEC:       +49.931d {+49d 55' 51"} (J2000)
ROLL:            58.372d
IMG_START_DATE:  16137 TJD;   211 DOY;   12/07/29
IMG_START_TIME:  39663.36 SOD {11:01:03.36} UT,   289.3 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     365252472
X_OFFSET:        1031 [pixels]
Y_OFFSET:        843 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1191
Y_GRB_POS:       1003
BINNING_INDEX:   1
IM_URL:          sw00529095000msuni0299.fits
SUN_POSTN:       129.12d {+08h 36m 29s}  +18.59d {+18d 35' 20"}
SUN_DIST:         91.27 [deg]   Sun_angle= 7.7 [hr] (West of Sun)
MOON_POSTN:      256.95d {+17h 07m 48s}  -21.49d {-21d 29' 33"}
MOON_DIST:       123.04 [deg]
MOON_ILLUM:      83 [%]
GAL_COORDS:      123.04,-12.94 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       34.90, 40.12 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN Circular #13530
T. N. Ukwatta (MSU), D. N. Burrows (PSU), M. M. Chester (PSU), S. T. Holland (STScI), H. A. Krimm (CRESST/GSFC/USRA), V. Mangano (INAF-IASFPA), A. Maselli (INAF-IASFPA), E. Sonbas (NASA/GSFC/Adiyaman Univ.) and M. Stamatikos (OSU/NASA/GSFC) report on behalf of the Swift Team:
At 10:56:14 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 120729A (trigger=529095). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 13.056, +49.940 which is
```
   RA(J2000) = 00h 52m 13s
   Dec(J2000) = +49d 56' 23"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a FRED-shaped structure with a total duration of about 25 sec. The peak count rate was ~5700 counts/sec (15-350 keV), at ~0 sec after the trigger.
The XRT began observing the field at 10:57:22.2 UT, 68.1 seconds after the BAT trigger. Using promptly downlinked data we find a bright, fading, uncatalogued X-ray source with an enhanced position: RA, Dec 13.0745, 49.9401 which is equivalent to:
```
   RA(J2000)  = 00h 52m 17.88s
   Dec(J2000) = +49d 56' 24.5"
```
with an uncertainty of 2.4 arcseconds (radius, 90% containment). This location is 43 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.
A power-law fit to a spectrum formed from promptly downlinked event data gives a column density in excess of the Galactic value (1.42 x 10^21 cm^-2, Kalberla et al. 2005), with an excess column of 2.1 (+1.91/-1.68) x 10^21 cm^-2 (90% confidence).
The initial flux in the 2.5 s image was 1.75e-09 erg cm^-2 s^-1 (0.2-10 keV).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 77 seconds after the BAT trigger. There is a candidate afterglow in the rapidly available 2.7'x2.7' sub-image at
```
  RA(J2000)  =	00:52:17.84 =  13.07433
  DEC(J2000) = +49:56:23.1  =  49.93974
```
with a 90%-confidence error radius of about 0.61 arc sec. This position is 1.4 arc sec. from the center of the XRT error circle. The estimated magnitude is 15.26 with a 1-sigma error of about 0.14. No correction has been made for the expected extinction corresponding to E(B-V) of 0.16.
Burst Advocate for this burst is T. N. Ukwatta (tilan.ukwatta AT gmail.com). 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 #13531
F.J. Virgili (LJMU), J. Japelj (U. Ljubljana), C.G. Mundell (LJMU), A. Melandri (INAF-OAB) report:
"The 2-m Faulkes Telescope North robotically followed up GRB120729A (SWIFT trigger 529095, Ukwatta et al. GCN 15530 ) 4.60 min after the GRB trigger time. The automatic "detection mode" procedure LT-TRAP (Guidorzi et al. 2006) detected a variable uncatalogued afterglow candidate consistent with the UVOT detection and within the XRT/UVOT and error circles at:
```
RA 00 52 17.82
DEC 49 56 23    (J2000)
```
with magnitude R = 16.4 mag (vs USNOB1) 4.60 min after the burst.
Observations are ongoing.
GCN Circular #13532
N. R. Tanvir (U. Leicester) and J. Ball (Gemini) report on behalf of a larger collaboration:
We observed the afterglow of GRB 120729A (Ukwatta et al. GCN 13530) using the GMOS-N spectrograph on Gemini-North.
Observations began at 2012-7-29 12:11 UT, about 75 mins post-burst. The spectrum reveals strong absorption lines of MgI, MgII, FeII, MnII. A provisional reduction gives a redshift of z=0.80, which we believe is most likely the redshift of this burst.
GCN Circular #13534
A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team.
Using 1033 s of XRT Photon Counting mode data and 2 UVOT images for GRB 120729A, 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 = 13.07446, +49.93967 which is equivalent to:
```
RA (J2000): 00h 52m 17.87s
Dec (J2000): +49d 56' 22.8"
```
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 #13536
D. M. Palmer (LANL), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA),C. B. Markwardt (GSFC), T. Sakamoto (GSFC/UMBC), G. Sato (ISAS), 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 the recent telemetry downlink, we report further analysis of BAT GRB 120729A (trigger #529095) (Ukwatta, et al., GCN Circ. 13530). The BAT ground-calculated position is RA, Dec = 13.078, 49.936 deg which is
```
    RA(J2000)  =  00h 52m 18.8s
    Dec(J2000) = +49d 56' 08.5"
```
with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 76%.
The mask-weighted light curve shows a single FRED peak with a rise of ~20 secs and a fall of ~100 seconds. There are no significant subsidiary peaks. T90 (15-350 keV) is 71.5 +- 17.5 sec (estimated error including systematics).
The time-averaged spectrum from T-3.08 to T+101.94 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.62 +- 0.08. The fluence in the 15-150 keV band is 2.4 +- 0.1 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T-0.03 sec in the 15-150 keV band is 2.9 +- 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/529095/BA/
GCN Circular #13537
L.P. Xin, J. Y. Wei, Y.L. Qiu, J. Wang, J.S. Deng, C. Wu, X. H. Han on behalf of EAFON report:
We began to observe GRB 120729A (Ukwatta et al. GCN Circ. 13530 ) with Xinglong TNT telescope at 15:23:22.671 (UT), 4.45 hour after the burst. A series of R-band images were obtained. Preliminary analysis shows that no any source was found at the location of optical counterpart (Ukwatta et al. GCN Circ. 13530; Virgili et al. GCN 13531), down to 3 sigma upper limit of R~19.5 mag, relatively to the USNO B1.0 R2 mag, at the mean time of 4.8 hour after the burst.
This message may be cited.
Thanks to the help of TNT observation assistant for this work.
For more information about Xinglong GRBs Follow-up observations, please visit the website: http://www.xinglong-naoc.org/grb/
GCN Circular #13539
S. R. Oates (MSSL-UCL) and T. N. Ukwatta (MSU) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 120729A 77 s after the BAT trigger (Ukwatta et al., GCN Circ. 13530). A source consistent with the XRT position (Beardmore et al., GCN Circ. 13534) and the optical position reported by FTN (Virgili et al., GCN Circ. 13531) is detected in the initial UVOT exposures.
The preliminary UVOT position is:
```
  RA  (J2000) =  00:52:17.83 =  13.07431 (deg.)
  Dec (J2000) = +49:56:23.1  =  49.93974 (deg.)
```
with an estimated uncertainty of 0.50 arc sec. (radius, 90% confidence).
Preliminary detections and 3-sigma upper limits using the UVOT 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               77          227          147         15.33 +/- 0.02
v                  620          640           20         15.92 +/- 0.15
b                  545          564           20         16.56 +/- 0.12
u                  289          539          246         15.78 +/- 0.04
w1                4113         4313          197         18.49 +/- 0.16
m2                3908         4108          197         18.91 +/- 0.25
w2                 595          615           20         17.57 +/- 0.32
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.16 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #13541
A. Maselli (INAF-IASFPA), D.N. Burrows (PSU), J.A. Kennea (PSU), M.C. Stroh (PSU), O.M. Littlejohns (U. Leicester), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), V. Mangano (INAF-IASFPA), A. Melandri (INAF-OAB) and T.N. Ukwatta report on behalf of the Swift-XRT team:
We have analysed 13 ks of XRT data for GRB 120729A (Ukwatta et al. GCN Circ. 13530), from 74 s to 29.5 ks after the BAT trigger. The data comprise 170 s 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 13534).
The light curve can be modelled with an initial power-law decay with an index of alpha=1.115 (+0.023, -0.022), followed by a break at T+8203 s to an alpha of 2.9 (+/-0.4).
A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 1.56 (+/-0.10). The best-fitting absorption column is 1.9 (+/-0.3) x 10^21 cm^-2, in excess of the Galactic value of 1.4 x 10^21 cm^-2 (Kalberla et al. 2005). The PC mode spectrum has a photon index of 1.87 (+0.15, -0.14) and a best-fitting absorption column of 2.1 (+0.5, -0.4) x 10^21 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 4.2 x 10^-11 (5.8 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     2.1 (+0.5, -0.4) x 10^21 cm^-2
Galactic foreground: 1.4 x 10^21 cm^-2
Excess significance: 2.5 sigma
Photon index:	     1.87 (+0.15, -0.14)
```
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00529095.
This circular is an official product of the Swift-XRT team.
GCN Circular #13543
Guver, T. (Sabanci Univ.), Sonbas, E. (GSFC, Adiyaman Univ.), S. Kaynar (Akdeniz Univ.), O. Onal (Istanbul Univ.), S. Tuncel Guctekin (Istanbul Univ.), Gogus, E. (Sabanci Univ.), S. Ak (Istanbul Univ.), Z. Eker (TUG) on behalf of a larger collaboration.
We observed the field of GRB 120729A (Ukwatta et al., GCN #13530) with the 1.0 meter T100 telescope (TUBITAK National Observatory, Antalya - Turkey), starting at 2012-07-29, 19:43:07 UT ( ~9 hours after the trigger). We obtained 4 x 300 s exposures with R filter under poor weather conditions (seeing 2.4").
Similar to the report by Xin et al. (GCN #13537) we do not detect an optical afterglow at the UVOT error circle reported by Ukwatta et al. (GCN #13530) in the combined R band image. We determine the 4-sigma detection limit of our R band image to be 20.04 mag, (calibrated to R2 of USNO-B1).
We are grateful to the TUBITAK National Observatory staff for promptly scheduling the observations and their technical support.
GCN Circular #13544
Myungshin Im and Jueun Hong (CEOU/Seoul National Univ.) on behalf of a larger collaboration.
We observed GRB 120729A (Ukwatta et al., GCN 13530) in ZYJHK using WFCAM on UKIRT.
The observation started at 2012-07-29 13:01:41 UT, or about 2.09 hours after the BAT alert. In all of the ZYJHK images, we identify the afterglow (H ~ 18.0 AB mag) which was reported earlier by several groups (Virgili et al. GCN 13531; Oates et al. GCN 13539). We also confirm fading of the object from another set of WFCAM data we took about 3 hours later.
Further observations are planned.
GCN Circular #13545
J. Wren, P. Wozniak, H. Davis, and W.T. Vestrand of Los Alamos National Laboratory report:
The RAPTOR network of robotic optical telescopes responded to Swift trigger 529095 (Ukwatta et al., GCN 13530). Observations began at 10:56:42.0 UT, 27.9 s after the initial Swift trigger and before the end of the gamma-ray emitting interval. Our observations were performed under clear skies with morning twilight just beginning. We clearly detect the optical counterpart (Ukwatta et al., GCN 13530, and Virgili et al., GCN 13531). We initially detect the counterpart at a magnitude of 13.2, and at about T+50 s it begins to fade steadily at a power law index of about 0.9 for the next 1000 seconds. Our unfiltered magnitudes are calibrated against the USNO-B1 R-band. The following table gives a sample of some of our observations. The image mid-points are given relative to the initial BAT trigger time.
```
t-mid(s)  exp(s)  mag     error
--------------------------------------
30.4      5       13.21   0.01
39.8      5       13.28   0.01
49.2      5       13.35   0.01
118.4     10      14.18   0.01
248.8     10      14.97   0.02
391.8     30      15.36   0.02
817.0     30      16.11   0.06
1071.4    30      16.46   0.11
```
GCN Circular #13546
G. Masi (Ceccano, Italy) and F. Nocentini (Frosinone, Italy) report:
On July 29.9496 2012 UT, we imaged the field around the position provided by Ukwatta et al. (GCN 13530) with the 0.43m-f/6.8 unit part of the Virtual Telescope robotic facility in Italy.
4, 300 seconds unfiltered CCD images were coadded and compared with a R plate from the DSS2: they do NOT show any obvious afterglow, down to R = 20.0 (based on USNO B1.0). The position of the afterglow mentioned on GCN 13530 is close to a R=19.2 source (with end figures 18.28s and 23.2", J2000.0).
GCN Circular #13547
T. Laskar, A. Zauderer and E. Berger (Harvard) report:
"We observed the position of GRB 120729A (Ukwatta et al. GCN 13530) with the EVLA beginning 2012 July 30.3 UT (0.84 days after the burst). No significant radio emission is detected at the enhanced Swift-XRT position (Beardmore et al. GCN 13534), the UVOT position (Oates et al. GCN 13539) or optical position (Virgili et al. GCN 13531) to three-sigma upper limits of 39 uJy and 58 uJy, at 5.8 and 21.8 GHz, respectively."
GCN Circular #13548
I. Khamitov (TUG), E.Beklen (SD Uni.), Z. Eker (TUG), U. Kiziloglu (METU), E. Gogus (Sabanci Uni.), R. Burenin, M. Pavlinsky, R. Sunyaev (IKI), I. Bikmaev, N. Sakhibullin (Kazan Federal University)
report:
We observed the field of the Swift-BAT GRB 120729A (Ukwatta et al. GCN 15530 ) with Russian-Turkish 1.5-m telescope (RTT150, Bakirlitepe, TUBITAK National Observatory, Turkey), starting at 30 Jul, 01:26 UT, i.e. approximately 14.5 hours after the burst, using TFOSC instrument.
We made 6x300s exposures in R-band under good atmospheric conditions (1.4 arcsec seeing) at the beginning of morning twilight without moonlight. We do not detect any new source on combined image at the position of OT (Virgili et al., GCN13531; Oates and Ukwatta, GCN13539). Using USNO-B1 stars we estimated the limiting magnitude of combined image as m_R =~ 23.5.
A small field around of the OT position can be found at:
http://hea.iki.rssi.ru/grb/120729a/indexeng.html
GCN Circular #13550
J. Gorosabel (IAA-CSIC), M. Jelinek (IAA-CSIC), Ch. Wang (Yunnan Observatory, China), C. Zurita (IAC), A. Sota (OSN, IAA-CSIC), J.C. Tello (IAA-CSIC), R. Sanchez-Ramirez (IAA-CSIC), A.J. Castro-Tirado (IAA-CSIC), report on behalf of a larger collaboration:
"We carried out BRI-band observations of the GRB 120729A (Ukwatta et al. GCN Circ. 13530) optical afterglow (Virgili et al. GCN Circ. 13531; Oates et al. GCN Circ. 13539) as follows:
```
Telescope	Obs.Date(UT)	Time post GRB(hr)	Exp.Time(s)	Mag.(Vega)
------------------------------------------------------------------------
0.3m Bootes-1B 	29.879537-30.022106     10.17-13.58     326x30  R > 19.0
0.6m Bootes-2	30.007951-30.042095     13.25-14.07     50x60   R > 19.4
1.5m OSN	30.077613-30.163785     14.93-16.99     18x300  R > 22.1
1.5m OSN	30.096195-30.099667     15.37-15.45     1x300   B > 21.5
0.82m IAC80	30.120174-30.205093     15.95-17.98     22x300  I = 21.9+/-0.3
```
The calibration was based on the USNO B1.0 catalogue."
GCN Circular #13551
P. D'Avanzo, A. Melandri (INAF-OAB), I. Steele, C.G. Mundell (LJMU), E. Palazzi (INAF-IASFBo) report, on behalf of larger collaborations:
We observed the optical counterpart of GRB 120729A (Ukwatta et al., GCN 13530; Virgili et al., GCN 13531; Oates et al., GCN 13539; Wren et al., GCN 13545) with the 2-m Faulkes Telescope North (FTN), the 2-m Liverpool Telescope (LT) and with the Italian 3.6m Telescopio Nazionale Galileo (TNG). Early time observations were carried out from 4.6 min to 2.1 hours after the burst with the FTN, while a later observation epoch was taken at a mid time of about 14.5 hours after the burst with the LT and the TNG.
From a preliminary analysis the overall R-band light curve can be described by an initial power-law decay with an index of alpha1=1.0 that breaks around t-t0=6000 s to a steeper decay with alpha2=1.8. The early time decay is consistent with the report of Wren et al. (GCN 13545).
The last detection was obtained with the TNG at a level of R ~ 23.3 mag (15.1 hours post burst) consistent with the marginal detections obtained with LT SDSS-r filter (image acquired ~13.6 hours after the burst). These late time values fall slightly below the best broken power-law fit described above, suggesting that the post-break decay index might be steeper than 2.
We note that the reported X-ray afterglow decay (Maselli et al., GCN 13541) shows a similar behaviour and that this may be indicative of an achromatic break in the afterglow light curve.
We thank the TNG staff for performing the ToO observations, in particular Massimo Cecconi.
GCN Circular #13554
I.A. Smith (Rice U.), R.P.J. Tilanus (JAC), N.R. Tanvir (U. of Leicester), D.A. Frail (NRAO) report:
We observed the location of GRB 120729A (Ukwatta et al., GCN Circ. 13530) using the SCUBA-2 sub-millimeter continuum camera on the James Clerk Maxwell Telescope. The observation started at 12:14 UT on 2012-07-29, corresponding to 78 minutes after the burst trigger. Exposures totaling 3.1 hours were made in reasonable weather conditions. No source was detected, with a preliminary RMS of 1.8 mJy/beam at 850 microns.
We thank Jeff Cox and Ruud Visser for their prompt support of these observations.
GCN Circular #13560
Arne Rau (MPE) reports on behalf of the Fermi GBM Team:
"At 10:56:12.67 UT on 29 July 2012, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 120729A (trigger 365252175 / 120729456) which was also detected by the Swift/BAT (Ukwatta et al. 2012, GCN 13530). The GBM on-ground location is consistent with the Swift position.
The angle from the Fermi LAT boresight is 83 degrees.
The GBM light curve shows a single pulse with a duration (T90) of about 25 s (50-300 keV). The time-averaged spectrum from T0-3.6 s to T0+17.9 s is best fit by a simple power law function with index -1.49 +/- 0.05.
The event fluence (10-1000 keV) in this time interval is (5.1 +/- 0.1)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0+1.2 s in the 10-1000 keV band is 5.2 +/- 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 Report 384.1
GCN_Report 384.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_384_1.pdf by T.N. Ukwatta at MSU titled: "Swift Observations of GRB 120729A"
GCN Circular #18184
Xianggao Wang (UC Berkeley, GXU, UNLV), WeiKang Zheng, Alexei V. Filippenko (UC Berkeley), and S. Bradley Cenko (GSFC) report on behalf of the KAIT GRB team:
The 0.76-m Katzman Automatic Imaging Telescope (KAIT), located at Lick Observatory, responded to Swift GRB 120729A (Ukwatta et al., GCN 13530) starting at 10:58:16 UT, 122 s after the burst. Observations were performed with an automatic sequence in the clear (roughly R), V, and I filters, and the exposure time was 20 s per image. The bright optical afterglow (Ukwatta et al. GCN 13530, Virgili et al. GCN 13531, Oates et al. GCN 13539, Im et al. 13544, Wren et al. 13545, Khamitov et al. GCN 13548, Gorosabel GCN 13550, D'Avanzo et al. GCN 13551, Smith et al. GCN 13554) was detected in all three filters. Useful observations lasted for about 2.4 hours. Preliminary analysis shows that the afterglow decays with a single power (with alpha = -0.87) beyond 1000 s after the burst. A light curve is posted at http://astro.berkeley.edu/~zwk/grb/GRB120729A/GRB120729A_kait.png .

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