Gamma-ray Burst 120722A

(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 22 Jul 12 12:54:44 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     528195,   Seg_Num: 0
GRB_RA:          230.491d {+15h 21m 58s} (J2000),
                 230.639d {+15h 22m 33s} (current),
                 229.901d {+15h 19m 36s} (1950)
GRB_DEC:         +13.250d {+13d 15' 01"} (J2000),
                 +13.206d {+13d 12' 21"} (current),
                 +13.429d {+13d 25' 43"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=1121 [image_cnts]
TRIGGER_DUR:     64.000 [sec] 
TRIGGER_INDEX:   20000     E_range: 15-50 keV
BKG_INTEN:       0 [cnts]
BKG_TIME:        0.00 SOD {00:00:00.00} UT
BKG_DUR:         0 [sec]
GRB_DATE:        16130 TJD;   204 DOY;   12/07/22
GRB_TIME:        46406.54 SOD {12:53:26.54} UT
GRB_PHI:         155.20 [deg]
GRB_THETA:        47.01 [deg]
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    7.90 [sigma]
MERIT_PARAMS:     +1  +0  +0  +6  +1  -2  +0  +0 +20  +0 
SUN_POSTN:       122.30d {+08h 09m 11s}  +20.13d {+20d 07' 30"}
SUN_DIST:        102.07 [deg]   Sun_angle= -7.2 [hr] (East of Sun)
MOON_POSTN:      160.55d {+10h 42m 12s}   +2.75d {+02d 44' 45"}
MOON_DIST:        69.99 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:       18.99, 52.24 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      223.99, 30.60 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This is an image trigger.  (The RATE_SIGNIF & BKG_{INTEN, TIME, DUR} are undefined.)  
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 = 92.87,-19.06 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 22 Jul 12 12:56:30 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     528195,   Seg_Num: 0
POINT_RA:        230.481d {+15h 21m 55s} (J2000)
POINT_DEC:       +13.252d {+13d 15' 07"} (J2000)
IMG_START_DATE:  16130 TJD;   204 DOY;   12/07/22
IMG_START_TIME:  46559.47 SOD {12:55:59.47} UT,   152.9 [sec] since BAT Trigger Time
COUNTS:          12    Min_needed= 20
STD_DEV:         0.00   Max_StdDev_for_Good=28.44 [arcsec]
PH2_ITER:        2    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:     Sun 22 Jul 12 12:58:08 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     528195,   Seg_Num: 0
GRB_RA:          230.491d {+15h 21m 58s} (J2000),
                 230.639d {+15h 22m 33s} (current),
                 229.901d {+15h 19m 36s} (1950)
GRB_DEC:         +13.250d {+13d 15' 01"} (J2000),
                 +13.206d {+13d 12' 21"} (current),
                 +13.429d {+13d 25' 43"} (1950)
GRB_DATE:        16130 TJD;   204 DOY;   12/07/22
GRB_TIME:        46406.54 SOD {12:53:26.54} UT
TRIGGER_INDEX:   20000
GRB_PHI:         155.20 [deg]
GRB_THETA:        47.01 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     64.000 [sec] 
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    7.90 [sigma]
LC_URL:          sw00528195000msb.lc
SUN_POSTN:       122.30d {+08h 09m 12s}  +20.12d {+20d 07' 28"}
SUN_DIST:        102.07 [deg]   Sun_angle= -7.2 [hr] (East of Sun)
MOON_POSTN:      160.58d {+10h 42m 19s}   +2.73d {+02d 44' 03"}
MOON_DIST:        69.97 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:       18.99, 52.24 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      223.99, 30.60 [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 an image 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 = 92.87,-19.06 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 22 Jul 12 12:59:30 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     528195,   Seg_Num: 0
POINT_RA:        230.481d {+15h 21m 55s} (J2000)
POINT_DEC:       +13.252d {+13d 15' 06"} (J2000)
POINT_ROLL:      294.255d
IMG_START_DATE:  16130 TJD;   204 DOY;   12/07/22
IMG_START_TIME:  46563.33 SOD {12:56:03.33} UT,   156.8 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.689
N_STARS:         42
X_OFFSET:        412 [pixels]
Y_OFFSET:        587 [pixels]
X_MAX:           1371 [pixels]
Y_MAX:           1546 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00528195000msufc0156.fits
SUN_POSTN:       122.30d {+08h 09m 12s}  +20.12d {+20d 07' 28"}
SUN_DIST:        102.06 [deg]   Sun_angle= -7.2 [hr] (East of Sun)
MOON_POSTN:      160.59d {+10h 42m 22s}   +2.73d {+02d 43' 46"}
MOON_DIST:        69.95 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:       18.99, 52.25 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      223.98, 30.60 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 22 Jul 12 13:00:02 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     528195,   Seg_Num: 0
POINT_RA:        230.481d {+15h 21m 55s} (J2000)
POINT_DEC:       +13.252d {+13d 15' 06"} (J2000)
POINT_ROLL:      294.255d
IMG_START_DATE:  16130 TJD;   204 DOY;   12/07/22
IMG_START_TIME:  46563.33 SOD {12:56:03.33} UT,   156.8 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.689
N_STARS:         42
X_OFFSET:        412 [pixels]
Y_OFFSET:        587 [pixels]
X_MAX:           1371 [pixels]
Y_MAX:           1546 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00528195000msufc0156.fits
SUN_POSTN:       122.30d {+08h 09m 12s}  +20.12d {+20d 07' 27"}
SUN_DIST:        102.06 [deg]   Sun_angle= -7.2 [hr] (East of Sun)
MOON_POSTN:      160.60d {+10h 42m 23s}   +2.73d {+02d 43' 40"}
MOON_DIST:        69.94 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:       18.99, 52.25 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      223.98, 30.60 [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 22 Jul 12 13:00:59 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     528195,   Seg_Num: 0
POINT_RA:        230.481d {+15h 21m 55s} (J2000)
POINT_DEC:       +13.252d {+13d 15' 06"} (J2000)
ROLL:            294.255d
IMG_START_DATE:  16130 TJD;   204 DOY;   12/07/22
IMG_START_TIME:  46563.33 SOD {12:56:03.33} UT,   156.8 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     364654572
X_OFFSET:        731 [pixels]
Y_OFFSET:        906 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       891
Y_GRB_POS:       1066
BINNING_INDEX:   1
IM_URL:          sw00528195000msuni0166.fits
SUN_POSTN:       122.30d {+08h 09m 12s}  +20.12d {+20d 07' 27"}
SUN_DIST:        102.05 [deg]   Sun_angle= -7.2 [hr] (East of Sun)
MOON_POSTN:      160.60d {+10h 42m 25s}   +2.72d {+02d 43' 28"}
MOON_DIST:        69.94 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:       18.99, 52.25 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      223.98, 30.60 [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:     Sun 22 Jul 12 13:01:06 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     528195,   Seg_Num: 0
POINT_RA:        230.481d {+15h 21m 55s} (J2000)
POINT_DEC:       +13.252d {+13d 15' 06"} (J2000)
ROLL:            294.255d
IMG_START_DATE:  16130 TJD;   204 DOY;   12/07/22
IMG_START_TIME:  46563.33 SOD {12:56:03.33} UT,   156.8 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     364654572
X_OFFSET:        731 [pixels]
Y_OFFSET:        906 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       891
Y_GRB_POS:       1066
BINNING_INDEX:   1
IM_URL:          sw00528195000msuni0166.fits
SUN_POSTN:       122.30d {+08h 09m 12s}  +20.12d {+20d 07' 27"}
SUN_DIST:        102.05 [deg]   Sun_angle= -7.2 [hr] (East of Sun)
MOON_POSTN:      160.61d {+10h 42m 25s}   +2.72d {+02d 43' 26"}
MOON_DIST:        69.93 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:       18.99, 52.25 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      223.98, 30.60 [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:     Sun 22 Jul 12 13:01:10 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     528195,   Seg_Num: 0
GRB_RA:          230.4966d {+15h 21m 59.18s} (J2000),
                 230.6448d {+15h 22m 34.74s} (current),
                 229.9068d {+15h 19m 37.63s} (1950)
GRB_DEC:         +13.2511d {+13d 15' 03.9"} (J2000),
                 +13.2067d {+13d 12' 24.1"} (current),
                 +13.4293d {+13d 25' 45.4"} (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:  16130 TJD;   204 DOY;   12/07/22
IMG_START_TIME:  46575.00 SOD {12:56:15.00} UT,   168.5 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       122.30d {+08h 09m 12s}  +20.12d {+20d 07' 27"}
SUN_DIST:        102.07 [deg]   Sun_angle= -7.2 [hr] (East of Sun)
MOON_POSTN:      160.61d {+10h 42m 25s}   +2.72d {+02d 43' 26"}
MOON_DIST:        69.95 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:       19.00, 52.24 [deg] galactic lon,lat of the burst
ECL_COORDS:      224.00, 30.60 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        TAM values, flux and significance fields are not valid.  
COMMENTS:        This position was automatically generated on the ground using  
COMMENTS:        Photon Counting data telemetered via TDRSS (SPER data).  
COMMENTS:        See http://www.swift.ac.uk/sper/docs.php for details.  
COMMENTS:        The probability that this is a serendipitous source in the  
COMMENTS:        SPER window is 0.58% < P(seren) < 1.1%.

GCN Circular #13499
A. Melandri (INAF-OAB), S. D. Barthelmy (GSFC), P. D'Avanzo (INAF-OAB), V. D'Elia (ASDC), N. Gehrels (NASA/GSFC), J. A. Kennea (PSU), F. E. Marshall (NASA/GSFC), K. L. Page (U Leicester), D. M. Palmer (LANL), B. Sbarufatti (INAF-OAB/PSU), M. H. Siegel (PSU) and E. Sonbas (NASA/GSFC/Adiyaman Univ.) report on behalf of the Swift Team:
At 12:53:26 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 120722A (trigger=528195). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 230.491, +13.250 which is
```
   RA(J2000)  =  15h 21m 58s
   Dec(J2000) = +13d 15' 01"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a peak with a total duration of about 25 sec. The peak count rate was ~1300 counts/sec (15-350 keV), at ~5 sec after the trigger.
The XRT began observing the field at 12:55:59.4 UT, 153.0 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source located at RA, Dec 230.49665, 13.25112 which is equivalent to:
```
   RA(J2000)  = 15h 21m 59.20s
   Dec(J2000) = +13d 15' 04.0"
```
with an uncertainty of 4.1 arcseconds (radius, 90% containment). This location is 20 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 does not constrain the column density.
UVOT took a finding chart exposure of 150 seconds with the White filter starting 156 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 0.05.
Burst Advocate for this burst is A. Melandri (andrea.melandri AT brera.inaf.it). 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:     Sun 22 Jul 12 13:07:38 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     528195,   Seg_Num: 0
POINT_RA:        230.482d {+15h 21m 56s} (J2000)
POINT_DEC:       +13.255d {+13d 15' 17"} (J2000)
POINT_ROLL:      294.257d
IMG_START_DATE:  16130 TJD;   204 DOY;   12/07/22
IMG_START_TIME:  46721.30 SOD {12:58:41.30} UT,   314.8 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.494
N_STARS:         79
X_OFFSET:        172 [pixels]
Y_OFFSET:        347 [pixels]
X_MAX:           1611 [pixels]
Y_MAX:           1786 [pixels]
DET_THRESH:      6
PHOTO_THRESH:    3
SL_URL:          sw00528195000msufc0314.fits
SUN_POSTN:       122.31d {+08h 09m 13s}  +20.12d {+20d 07' 24"}
SUN_DIST:        102.05 [deg]   Sun_angle= -7.2 [hr] (East of Sun)
MOON_POSTN:      160.66d {+10h 42m 39s}   +2.70d {+02d 42' 06"}
MOON_DIST:        69.89 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:       18.99, 52.25 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      223.98, 30.60 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 22 Jul 12 13:07:52 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     528195,   Seg_Num: 0
POINT_RA:        230.482d {+15h 21m 56s} (J2000)
POINT_DEC:       +13.255d {+13d 15' 17"} (J2000)
POINT_ROLL:      294.257d
IMG_START_DATE:  16130 TJD;   204 DOY;   12/07/22
IMG_START_TIME:  46721.30 SOD {12:58:41.30} UT,   314.8 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.494
N_STARS:         79
X_OFFSET:        172 [pixels]
Y_OFFSET:        347 [pixels]
X_MAX:           1611 [pixels]
Y_MAX:           1786 [pixels]
DET_THRESH:      6
PHOTO_THRESH:    3
SL_URL:          sw00528195000msufc0314.fits
SUN_POSTN:       122.31d {+08h 09m 13s}  +20.12d {+20d 07' 24"}
SUN_DIST:        102.05 [deg]   Sun_angle= -7.2 [hr] (East of Sun)
MOON_POSTN:      160.66d {+10h 42m 39s}   +2.70d {+02d 42' 03"}
MOON_DIST:        69.88 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:       18.99, 52.25 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      223.98, 30.60 [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 22 Jul 12 13:08:42 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     528195,   Seg_Num: 0
POINT_RA:        230.482d {+15h 21m 56s} (J2000)
POINT_DEC:       +13.255d {+13d 15' 17"} (J2000)
ROLL:            294.257d
IMG_START_DATE:  16130 TJD;   204 DOY;   12/07/22
IMG_START_TIME:  46721.30 SOD {12:58:41.30} UT,   314.8 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     364654730
X_OFFSET:        731 [pixels]
Y_OFFSET:        906 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       891
Y_GRB_POS:       1066
BINNING_INDEX:   1
IM_URL:          sw00528195000msuni0324.fits
SUN_POSTN:       122.31d {+08h 09m 13s}  +20.12d {+20d 07' 23"}
SUN_DIST:        102.05 [deg]   Sun_angle= -7.2 [hr] (East of Sun)
MOON_POSTN:      160.67d {+10h 42m 41s}   +2.70d {+02d 41' 53"}
MOON_DIST:        69.88 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:       18.99, 52.25 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      223.98, 30.60 [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:     Sun 22 Jul 12 13:08:55 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     528195,   Seg_Num: 0
POINT_RA:        230.482d {+15h 21m 56s} (J2000)
POINT_DEC:       +13.255d {+13d 15' 17"} (J2000)
ROLL:            294.257d
IMG_START_DATE:  16130 TJD;   204 DOY;   12/07/22
IMG_START_TIME:  46721.30 SOD {12:58:41.30} UT,   314.8 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     364654730
X_OFFSET:        731 [pixels]
Y_OFFSET:        906 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       891
Y_GRB_POS:       1066
BINNING_INDEX:   1
IM_URL:          sw00528195000msuni0324.fits
SUN_POSTN:       122.31d {+08h 09m 13s}  +20.12d {+20d 07' 23"}
SUN_DIST:        102.05 [deg]   Sun_angle= -7.2 [hr] (East of Sun)
MOON_POSTN:      160.67d {+10h 42m 42s}   +2.70d {+02d 41' 50"}
MOON_DIST:        69.88 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:       18.99, 52.25 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      223.98, 30.60 [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:     Sun 22 Jul 12 13:08:50 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     528195,   Seg_Num: 0
GRB_RA:          230.4962d {+15h 21m 59.08s} (J2000),
                 230.6444d {+15h 22m 34.65s} (current),
                 229.9064d {+15h 19m 37.53s} (1950)
GRB_DEC:         +13.2510d {+13d 15' 03.5"} (J2000),
                 +13.2066d {+13d 12' 23.7"} (current),
                 +13.4292d {+13d 25' 45.1"} (1950)
GRB_ERROR:       2.6 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  16130 TJD;   204 DOY;   12/07/22
IMG_START_TIME:  46575.00 SOD {12:56:15.00} UT,   168.5 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       122.31d {+08h 09m 13s}  +20.12d {+20d 07' 23"}
SUN_DIST:        102.06 [deg]   Sun_angle= -7.2 [hr] (East of Sun)
MOON_POSTN:      160.67d {+10h 42m 41s}   +2.70d {+02d 41' 51"}
MOON_DIST:        69.89 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:       19.00, 52.24 [deg] galactic lon,lat of the burst
ECL_COORDS:      224.00, 30.60 [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 22 Jul 12 13:15:06 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     528195,   Seg_Num: 0
POINT_RA:        230.482d {+15h 21m 56s} (J2000)
POINT_DEC:       +13.255d {+13d 15' 17"} (J2000)
POINT_ROLL:      294.257d
IMG_START_DATE:  16130 TJD;   204 DOY;   12/07/22
IMG_START_TIME:  47278.44 SOD {13:07:58.44} UT,   871.9 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.939
N_STARS:         77
X_OFFSET:        172 [pixels]
Y_OFFSET:        347 [pixels]
X_MAX:           1611 [pixels]
Y_MAX:           1786 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00528195000msufc0871.fits
SUN_POSTN:       122.31d {+08h 09m 14s}  +20.12d {+20d 07' 20"}
SUN_DIST:        102.05 [deg]   Sun_angle= -7.2 [hr] (East of Sun)
MOON_POSTN:      160.73d {+10h 42m 54s}   +2.68d {+02d 40' 34"}
MOON_DIST:        69.83 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:       18.99, 52.25 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      223.98, 30.60 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 22 Jul 12 13:15:18 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     528195,   Seg_Num: 0
POINT_RA:        230.482d {+15h 21m 56s} (J2000)
POINT_DEC:       +13.255d {+13d 15' 17"} (J2000)
POINT_ROLL:      294.257d
IMG_START_DATE:  16130 TJD;   204 DOY;   12/07/22
IMG_START_TIME:  47278.44 SOD {13:07:58.44} UT,   871.9 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.939
N_STARS:         77
X_OFFSET:        172 [pixels]
Y_OFFSET:        347 [pixels]
X_MAX:           1611 [pixels]
Y_MAX:           1786 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00528195000msufc0871.fits
SUN_POSTN:       122.31d {+08h 09m 15s}  +20.12d {+20d 07' 20"}
SUN_DIST:        102.05 [deg]   Sun_angle= -7.2 [hr] (East of Sun)
MOON_POSTN:      160.73d {+10h 42m 55s}   +2.68d {+02d 40' 32"}
MOON_DIST:        69.83 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:       18.99, 52.25 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      223.98, 30.60 [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 22 Jul 12 13:16:42 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     528195,   Seg_Num: 0
POINT_RA:        230.482d {+15h 21m 56s} (J2000)
POINT_DEC:       +13.255d {+13d 15' 17"} (J2000)
ROLL:            294.257d
IMG_START_DATE:  16130 TJD;   204 DOY;   12/07/22
IMG_START_TIME:  47278.44 SOD {13:07:58.44} UT,   871.9 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     364655287
X_OFFSET:        731 [pixels]
Y_OFFSET:        906 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       891
Y_GRB_POS:       1066
BINNING_INDEX:   1
IM_URL:          sw00528195000msuni0881.fits
SUN_POSTN:       122.31d {+08h 09m 15s}  +20.12d {+20d 07' 19"}
SUN_DIST:        102.05 [deg]   Sun_angle= -7.2 [hr] (East of Sun)
MOON_POSTN:      160.74d {+10h 42m 58s}   +2.67d {+02d 40' 15"}
MOON_DIST:        69.82 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:       18.99, 52.25 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      223.98, 30.60 [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:     Sun 22 Jul 12 13:16:31 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     528195,   Seg_Num: 0
POINT_RA:        230.482d {+15h 21m 56s} (J2000)
POINT_DEC:       +13.255d {+13d 15' 17"} (J2000)
ROLL:            294.257d
IMG_START_DATE:  16130 TJD;   204 DOY;   12/07/22
IMG_START_TIME:  47278.44 SOD {13:07:58.44} UT,   871.9 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     364655287
X_OFFSET:        731 [pixels]
Y_OFFSET:        906 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       891
Y_GRB_POS:       1066
BINNING_INDEX:   1
IM_URL:          sw00528195000msuni0881.fits
SUN_POSTN:       122.31d {+08h 09m 15s}  +20.12d {+20d 07' 19"}
SUN_DIST:        102.05 [deg]   Sun_angle= -7.2 [hr] (East of Sun)
MOON_POSTN:      160.74d {+10h 42m 57s}   +2.67d {+02d 40' 17"}
MOON_DIST:        69.82 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:       18.99, 52.25 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      223.98, 30.60 [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 Circular #13500
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 120722A (Melandri et al. GCN 13499) with Xinglong TNT telescope in R-band at 12:56:53 (UT), 3.5 min after the burst. An optical counterpart was detected in our combined image within the errorbox of X-ray afterglow location (Melandri et al. GCN 13499) with a brightness of about 20.8 mag in R band, calibrated against the USNO B1.0 R2mag.
The coordinates and magnitude of the reference star we used are 15:21:54.116 +13:15:50.70, J2000 and R2=16.91 mag in USNO B1.0.
This message may be cited.
Further observations are encouraged.
For more information about Xinglong GRBs Follow-up observations, please visit the website: http://www.xinglong-naoc.org:8080/grb/index.html
We thank Chunlan Lu for performing these observations.
GCN Circular #13501
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 apologize for the wrong result reported in GCN circ. 13500 .
Caused by a wrong astronomical calibration, the optical candidate of GRB 120722A reported in GCN circ. 13500 should be a known object in the USNO B1.0
Therefore, no any new source within the location of XRT counterpart was detected by TNT. The 3 sigma upper limit of 21 mag was derived relatively to USNO B1.0 R2 mag.
GCN Circular #13502
P.A. Evans, M.R. Goad, J.P. Osborne and A.P. Beardmore (U. Leicester) report on behalf of the Swift-XRT team.
Using 1220 s of XRT Photon Counting mode data and 2 UVOT images for GRB 120722A, 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 = 230.49656, +13.25109 which is equivalent to:
```
RA (J2000): 15h 21m 59.17s
Dec (J2000): +13d 15' 03.9"
```
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 #13503
T. Sakamoto (GSFC/UMBC), 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), A. Melandri (INAF-OAB), D. M. Palmer (LANL), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (GWU) (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 120722A (trigger #528195) (Melandri, et al., GCN Circ. 13499). The BAT ground-calculated position is RA, Dec = 230.489, 13.249 deg, which is
```
   RA(J2000)  =  15h 21m 57.4s 
   Dec(J2000) = +13d 14' 56.8" 
```
with an uncertainty of 3.4 arcmin, (radius, sys+stat, 90% containment). The partial coding was 19%.
The mask-weighted light curve shows a couple overlapping peaks starting at ~T-10 sec, peaking at ~T+23 sec, and ending at ~T+50 sec. T90 (15-350 keV) is 42.4 +- 10.5 sec (estimated error including systematics).
The time-averaged spectrum from T-0.3 to T+47.5 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.90 +- 0.25. The fluence in the 15-150 keV band is 1.2 +- 0.2 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+24.02 sec in the 15-150 keV band is 1.0 +- 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/528195/BA/
GCN Circular #13504
C. Pagani (U. Leicester), G. Stratta (ASDC), P. D'Avanzo (INAF-OAB), V. D'Elia (ASDC), D.N. Burrows (PSU), J.A. Kennea (PSU), M.C. Stroh (PSU), A.P. Beardmore (U. Leicester), P.A. Evans (U. Leicester) and A. Melandri report on behalf of the Swift-XRT team:
We have analysed 8.4 ks of XRT data for GRB 120722A (Melandri et al. GCN Circ. 13499), from 161 s to 27.7 ks after the BAT trigger. The data are entirely in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Evans et al. (GCN. Circ 13502).
The light curve can be modelled with a power-law decay with a decay index of alpha=0.85 (+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 2.6 (+0.8, -0.7). The best-fitting absorption column is 5.1 (+1.8, -1.5) x 10^22 cm^-2, in excess of the Galactic value of 3.1 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 8.4 x 10^-11 (5.7 x 10^-10) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     5.1 (+1.8, -1.5) x 10^22 cm^-2
Galactic foreground: 3.1 x 10^20 cm^-2
Excess significance: 5.6 sigma
Photon index:	     2.6 (+0.8, -0.7)
```
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00528195.
This circular is an official product of the Swift-XRT team.
GCN Circular #13505
F. Aceituno (OSN, IAA-CSIC), R. Sanchez-Ramirez (IAA-CSIC), A. de Ugarte Postigo (IAA-CSIC, DARK), J. Gorosabel (IAA-CSIC), A.J. Castro-Tirado (IAA-CSIC), report on behalf of a larger collaboration:
"We observed the field of the GRB 120722A XRT error circle (Melandri et al., GCN 13499; Evans et al., GCN 13502) with the 1.5m telescope at the Observatorio de Sierra Nevada, Granada, Spain. The observations were conducted in the I-band with a total exposure time of 16x300s on July 22.86617-22.92716 UT (7.9--9.4 hours post GRB). No object is detected inside the XRT error circle down to I~21 (Vega mag, calibrated against USNO-B1.0). We note the presence of a faint object close to the XRT error circle border located at RA(J2000)=15:21:59.19, Dec(J2000)=+13:15:05.0 (+/-0.9") which seems also present at the SDSS."
GCN Circular #13506
V. Sudilovsky (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 120722A (Swift trigger 528195; Melandri et al., GCN #13499) simultaneously in g'r'i'z'JHK 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 23:20 UT on 2012-07-22, 10.5 hrs after the GRB trigger. They were performed at an average seeing of 1.1" arcsec and at an average airmass of 1.4.
Inside the 2.1 arcsecond XRT error circle (Evans et al., GCN #13502), we detect a fading source in g'r'i'z' at coordinates RA,DEC (J2000) = 230.4966, 13.2513 = 15:21:59.184, +13:15:04.68 (+/- 0.3 arcsec).
Based on exposures of 1600 seconds in g'r'i'z' and 1200 seconds in JHK, we measure the following preliminary magnitudes (all in the AB system)
```
   g' = 23.8 +- 0.1,
   r' = 23.6 +- 0.1,
   i' = 22.8 +- 0.1,
   z' = 22.6 +- 0.1,
   J  > 21.8,
   H  > 21.2,
   K  > 19.8.
```
The power-law like SED and fading nature of this source confirm that it is the afterglow of GRB 120722A.
All magnitudes are calibrated against SDSS (g'r'i'z') and 2MASS field stars. The magnitudes have not been corrected for the Galactic reddening of E(B-V)=0.05 mag along the line of sight towards the source (Schlegel et al. 1998).
GCN Circular #13507
V. D'Elia (ASDC/INAF-OAR), D. Xu (WIS), A. de Ugarte Postigo (IAA-CSIC, DARK), D. Malesani (DARK/NBI), , J. P. U. Fynbo (DARK/NBI), P. Goldoni (APC,CEA/Irfu), N. R. Tanvir (U. of Leicester) and T. Kruehler (DARK/NBI) report on behalf of the GRB/X-shooter collaboration
We imaged the field of GRB 120722A (Melandri et al., GCN 13499) with the ESO VLT equipped with the X-shooter spectrograph. Observations started on 2012 July 22 at 23:08 UT (10 hr after the GRB), for a total exposure time of 80 min in each of the UVB, VIS, and NIR arms, covering the wavelength range 3000-25000 AA. Within the XRT error circle we noted a SDSS object, which is coincident with the position of the afterglow reported by Sudilovsky et al. (GCN 13506). The slit was positioned on this object. The object reported by Sudilovsky et al. (GCN 13506) is faintly detected in a combined stack of the ugriz SDSS data, suggesting a significant host contribution. The object is also well detected in our R-band acquisition images.
The spectrum is dominated by several nebular emission lines from the candidate host galaxy, including [O II], [O III] and Balmer lines (Halpha, Hbeta and Hgamma), at a common redshift z = 0.9586. Given the superposition with the optical afterglow reported by Sudilovsky et al. (GCN 13506), this is likely the host galaxy of GRB120722A.
We acknowledge excellent support from the ESO staff, in particular Lorenzo Monaco, Lorena Faundez and Emanuela Pompei.
GCN Circular #13508
T. A. Pritchard (PSU) and A. Melandri (INAF-OAB) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 120722A 157 s after the BAT trigger (Melandri et al., GCN Circ. 13499). No optical afterglow consistent with the Enhanced Swift-XRT position (Evans et al., GCN Circ. 13502)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           157          307          147         >20.9
u_FC               315          565          246         >20.2
white              157         7159          685         >21.7
v                  646        11696         1356         >20.5
b                  570        18708          758         >21.4
u                  315        18411         1583         >21.6
w1                 696        16188          820         >21.3
m2                4785        12602         1279         >21.1
w2                1028         6012          216         >20.2
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.05 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #13521
A. Volnova (SAI MSU, IKI), A. Ivanov, V. Ivanov, V. Lysenko (Kuban State University), A. Pozanenko (IKI)
We observed the field of the Swift GRB 120422A (Troja et al., GCN 13243) with 20-inch telescope C40 of Kuban State University Astrophysical Observatory on April 22 between (UT) 18:51:21 - 21:54:56 under mean FWHM of about 3.5 arcsec. We took two series of 30 s and 60 s exposures using R filter. In a stacked image we do not detect any source in the enhanced XRT error circle (Evans et al., GCN 13502). A preliminary photometry is based on the nearby USNO-B1.0 stars:
```
T0+         Filter, Exposure,              OT,   uplim (3 sigma)

(mid, d)             (s)
0.28316   R       60*30s + 31*60s     n/d   21.2
```
GCN Report 382.1
GCN_Report 382.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_382_1.pdf by A. Melandri at INAF-OAB titled: "Swift Observations of GRB 120722A"

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Jochen Greiner, last update: 22-Aug-2012 [Disclaimer]