Gamma-ray Burst 090814

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 14 Aug 09 00:54:00 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     359951,   Seg_Num: 0
GRB_RA:          239.611d {+15h 58m 27s} (J2000),
                 239.712d {+15h 58m 51s} (current),
                 239.085d {+15h 56m 21s} (1950)
GRB_DEC:         +25.599d {+25d 35' 57"} (J2000),
                 +25.572d {+25d 34' 19"} (current),
                 +25.741d {+25d 44' 28"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=1837 [image_cnts]
TRIGGER_DUR:     88.000 [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:        15057 TJD;   226 DOY;   09/08/14
GRB_TIME:        3139.00 SOD {00:52:19.00} UT
GRB_PHI:          73.39 [deg]
GRB_THETA:        30.23 [deg]
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    10.01 [sigma]
MERIT_PARAMS:     +1  +0  +0  +6  +1  +0  +0  +0  -2  +0 
SUN_POSTN:       143.77d {+09h 35m 04s}  +14.37d {+14d 22' 22"}
SUN_DIST:         89.05 [deg]   Sun_angle= -6.4 [hr] (East of Sun)
MOON_POSTN:       50.83d {+03h 23m 20s}  +23.50d {+23d 29' 48"}
MOON_DIST:       130.18 [deg]
MOON_ILLUM:      47 [%]
GAL_COORDS:       41.82, 48.33 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      229.91, 44.90 [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 = 194.76,2.90 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 14 Aug 09 00:55:26 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     359951,   Seg_Num: 0
GRB_RA:          239.6108d {+15h 58m 26.59s} (J2000),
                 239.7119d {+15h 58m 50.84s} (current),
                 239.0856d {+15h 56m 20.53s} (1950)
GRB_DEC:         +25.6307d {+25d 37' 50.5"} (J2000),
                 +25.6037d {+25d 36' 13.1"} (current),
                 +25.7726d {+25d 46' 21.4"} (1950)
GRB_ERROR:       5.2 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.65e-09 [erg/cm2/sec]
GRB_SIGNIF:      8.00 [sigma]
IMG_START_DATE:  15057 TJD;   226 DOY;   09/08/14
IMG_START_TIME:  3298.30 SOD {00:54:58.30} UT,   159.3 [sec] since BAT Trigger Time
TAM[0-3]:        327.64 237.25 261.43 243.42
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       143.77d {+09h 35m 04s}  +14.37d {+14d 22' 21"}
SUN_DIST:         89.04 [deg]   Sun_angle= -6.4 [hr] (East of Sun)
MOON_POSTN:       50.85d {+03h 23m 23s}  +23.50d {+23d 29' 58"}
MOON_DIST:       130.15 [deg]
MOON_ILLUM:      47 [%]
GAL_COORDS:       41.87, 48.33 [deg] galactic lon,lat of the burst
ECL_COORDS:      229.89, 44.93 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 1.90 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 14 Aug 09 00:55:42 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     359951,   Seg_Num: 0
GRB_RA:          239.6108d {+15h 58m 26.5s} (J2000),
                 239.7119d {+15h 58m 50.8s} (current),
                 239.0856d {+15h 56m 20.5s} (1950)
GRB_DEC:         +25.6307d {+25d 37' 50.5"} (J2000),
                 +25.6037d {+25d 36' 13.1"} (current),
                 +25.7726d {+25d 46' 21.4"} (1950)
GRB_ERROR:       5.0 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       64 [cnts]
IMG_START_DATE:  15057 TJD;   226 DOY;   09/08/14
IMG_START_TIME:  3298.30 SOD {00:54:58.30} UT,   159.3 [sec] since BAT Trigger Time
CENTROID_X:      326.84,  raw= 327  [pixels]
CENTROID_Y:      259.15,  raw= 259  [pixels]
ROLL:            285.45 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -91.57
GRB_POS_XRT_Z:   57.85
IMAGE_URL:       sw00359951000msxps_rw.img
SUN_POSTN:       143.77d {+09h 35m 04s}  +14.37d {+14d 22' 21"}
SUN_DIST:         89.04 [deg]   Sun_angle= -6.4 [hr] (East of Sun)
MOON_POSTN:       50.85d {+03h 23m 24s}  +23.50d {+23d 30' 00"}
MOON_DIST:       130.15 [deg]
MOON_ILLUM:      47 [%]
GAL_COORDS:       41.87, 48.33 [deg] galactic lon,lat of the burst
ECL_COORDS:      229.89, 44.93 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 14 Aug 09 00:55:36 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     359951,   Seg_Num: 0
GRB_RA:          239.6108d {+15h 58m 26.5s} (J2000),
                 239.7119d {+15h 58m 50.8s} (current),
                 239.0856d {+15h 56m 20.5s} (1950)
GRB_DEC:         +25.6307d {+25d 37' 50.5"} (J2000),
                 +25.6037d {+25d 36' 13.1"} (current),
                 +25.7726d {+25d 46' 21.4"} (1950)
GRB_ERROR:       5.0 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       64 [cnts]
IMG_START_DATE:  15057 TJD;   226 DOY;   09/08/14
IMG_START_TIME:  3298.30 SOD {00:54:58.30} UT,   159.3 [sec] since BAT Trigger Time
CENTROID_X:      326.84,  raw= 327  [pixels]
CENTROID_Y:      259.15,  raw= 259  [pixels]
ROLL:            285.45 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -91.57
GRB_POS_XRT_Z:   57.85
IMAGE_URL:       sw00359951000msxps_rw.img
SUN_POSTN:       143.77d {+09h 35m 04s}  +14.37d {+14d 22' 21"}
SUN_DIST:         89.04 [deg]   Sun_angle= -6.4 [hr] (East of Sun)
MOON_POSTN:       50.85d {+03h 23m 24s}  +23.50d {+23d 29' 59"}
MOON_DIST:       130.15 [deg]
MOON_ILLUM:      47 [%]
GAL_COORDS:       41.87, 48.33 [deg] galactic lon,lat of the burst
ECL_COORDS:      229.89, 44.93 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 14 Aug 09 00:56:44 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     359951,   Seg_Num: 0
GRB_RA:          239.611d {+15h 58m 27s} (J2000),
                 239.712d {+15h 58m 51s} (current),
                 239.085d {+15h 56m 21s} (1950)
GRB_DEC:         +25.599d {+25d 35' 57"} (J2000),
                 +25.572d {+25d 34' 19"} (current),
                 +25.741d {+25d 44' 28"} (1950)
GRB_DATE:        15057 TJD;   226 DOY;   09/08/14
GRB_TIME:        3139.00 SOD {00:52:19.00} UT
TRIGGER_INDEX:   20000
GRB_PHI:          73.39 [deg]
GRB_THETA:        30.23 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     88.000 [sec] 
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    10.01 [sigma]
LC_URL:          sw00359951000msb.lc
SUN_POSTN:       143.77d {+09h 35m 04s}  +14.37d {+14d 22' 20"}
SUN_DIST:         89.05 [deg]   Sun_angle= -6.4 [hr] (East of Sun)
MOON_POSTN:       50.86d {+03h 23m 27s}  +23.50d {+23d 30' 08"}
MOON_DIST:       130.18 [deg]
MOON_ILLUM:      47 [%]
GAL_COORDS:       41.82, 48.33 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      229.91, 44.90 [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 = 194.76,2.90 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 14 Aug 09 00:58:20 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     359951,   Seg_Num: 0
POINT_RA:        239.586d {+15h 58m 21s} (J2000)
POINT_DEC:       +25.610d {+25d 36' 38"} (J2000)
POINT_ROLL:      285.451d
IMG_START_DATE:  15057 TJD;   226 DOY;   09/08/14
IMG_START_TIME:  3308.54 SOD {00:55:08.54} UT,   169.5 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        4.399
N_STARS:         24
X_OFFSET:        451 [pixels]
Y_OFFSET:        781 [pixels]
X_MAX:           1410 [pixels]
Y_MAX:           1740 [pixels]
DET_THRESH:      17
PHOTO_THRESH:    10
SL_URL:          sw00359951000msufc0169.fits
SUN_POSTN:       143.77d {+09h 35m 05s}  +14.37d {+14d 22' 19"}
SUN_DIST:         89.02 [deg]   Sun_angle= -6.4 [hr] (East of Sun)
MOON_POSTN:       50.88d {+03h 23m 30s}  +23.51d {+23d 30' 19"}
MOON_DIST:       130.18 [deg]
MOON_ILLUM:      47 [%]
GAL_COORDS:       41.83, 48.35 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      229.87, 44.90 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 14 Aug 09 00:58:49 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     359951,   Seg_Num: 0
POINT_RA:        239.586d {+15h 58m 21s} (J2000)
POINT_DEC:       +25.610d {+25d 36' 38"} (J2000)
POINT_ROLL:      285.451d
IMG_START_DATE:  15057 TJD;   226 DOY;   09/08/14
IMG_START_TIME:  3308.54 SOD {00:55:08.54} UT,   169.5 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        4.399
N_STARS:         24
X_OFFSET:        451 [pixels]
Y_OFFSET:        781 [pixels]
X_MAX:           1410 [pixels]
Y_MAX:           1740 [pixels]
DET_THRESH:      17
PHOTO_THRESH:    10
SL_URL:          sw00359951000msufc0169.fits
SUN_POSTN:       143.77d {+09h 35m 05s}  +14.37d {+14d 22' 18"}
SUN_DIST:         89.02 [deg]   Sun_angle= -6.4 [hr] (East of Sun)
MOON_POSTN:       50.88d {+03h 23m 32s}  +23.51d {+23d 30' 23"}
MOON_DIST:       130.18 [deg]
MOON_ILLUM:      47 [%]
GAL_COORDS:       41.83, 48.35 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      229.87, 44.90 [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:     Fri 14 Aug 09 00:58:20 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     359951,   Seg_Num: 0
POINT_RA:        239.586d {+15h 58m 21s} (J2000)
POINT_DEC:       +25.610d {+25d 36' 38"} (J2000)
POINT_ROLL:      285.451d
IMG_START_DATE:  15057 TJD;   226 DOY;   09/08/14
IMG_START_TIME:  3308.54 SOD {00:55:08.54} UT,   169.5 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        4.399
N_STARS:         24
X_OFFSET:        451 [pixels]
Y_OFFSET:        781 [pixels]
X_MAX:           1410 [pixels]
Y_MAX:           1740 [pixels]
DET_THRESH:      17
PHOTO_THRESH:    10
SL_URL:          sw00359951000msufc0169.fits
SUN_POSTN:       143.77d {+09h 35m 05s}  +14.37d {+14d 22' 19"}
SUN_DIST:         89.02 [deg]   Sun_angle= -6.4 [hr] (East of Sun)
MOON_POSTN:       50.88d {+03h 23m 30s}  +23.51d {+23d 30' 19"}
MOON_DIST:       130.18 [deg]
MOON_ILLUM:      47 [%]
GAL_COORDS:       41.83, 48.35 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      229.87, 44.90 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 14 Aug 09 01:00:18 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     359951,   Seg_Num: 0
POINT_RA:        239.586d {+15h 58m 21s} (J2000)
POINT_DEC:       +25.610d {+25d 36' 38"} (J2000)
ROLL:            285.451d
IMG_START_DATE:  15057 TJD;   226 DOY;   09/08/14
IMG_START_TIME:  3308.54 SOD {00:55:08.54} UT,   169.5 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     271904113
X_OFFSET:        771 [pixels]
Y_OFFSET:        1101 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       931
Y_GRB_POS:       1261
BINNING_INDEX:   1
IM_URL:          sw00359951000msuni0174.fits
SUN_POSTN:       143.77d {+09h 35m 05s}  +14.37d {+14d 22' 17"}
SUN_DIST:         89.02 [deg]   Sun_angle= -6.4 [hr] (East of Sun)
MOON_POSTN:       50.90d {+03h 23m 35s}  +23.51d {+23d 30' 33"}
MOON_DIST:       130.17 [deg]
MOON_ILLUM:      47 [%]
GAL_COORDS:       41.83, 48.35 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      229.87, 44.90 [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:     Fri 14 Aug 09 01:00:36 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     359951,   Seg_Num: 0
POINT_RA:        239.586d {+15h 58m 21s} (J2000)
POINT_DEC:       +25.610d {+25d 36' 38"} (J2000)
ROLL:            285.451d
IMG_START_DATE:  15057 TJD;   226 DOY;   09/08/14
IMG_START_TIME:  3308.54 SOD {00:55:08.54} UT,   169.5 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     271904113
X_OFFSET:        771 [pixels]
Y_OFFSET:        1101 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       931
Y_GRB_POS:       1261
BINNING_INDEX:   1
IM_URL:          sw00359951000msuni0174.fits
SUN_POSTN:       143.77d {+09h 35m 05s}  +14.37d {+14d 22' 17"}
SUN_DIST:         89.02 [deg]   Sun_angle= -6.4 [hr] (East of Sun)
MOON_POSTN:       50.90d {+03h 23m 36s}  +23.51d {+23d 30' 35"}
MOON_DIST:       130.17 [deg]
MOON_ILLUM:      47 [%]
GAL_COORDS:       41.83, 48.35 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      229.87, 44.90 [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:     Fri 14 Aug 09 01:02:50 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     359951,   Seg_Num: 0
POINT_RA:        239.584d {+15h 58m 20s} (J2000)
POINT_DEC:       +25.611d {+25d 36' 39"} (J2000)
POINT_ROLL:      285.451d
IMG_START_DATE:  15057 TJD;   226 DOY;   09/08/14
IMG_START_TIME:  3466.57 SOD {00:57:46.57} UT,   327.6 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.930
N_STARS:         15
X_OFFSET:        451 [pixels]
Y_OFFSET:        781 [pixels]
X_MAX:           1410 [pixels]
Y_MAX:           1740 [pixels]
DET_THRESH:      8
PHOTO_THRESH:    4
SL_URL:          sw00359951000msufc0327.fits
SUN_POSTN:       143.77d {+09h 35m 05s}  +14.37d {+14d 22' 15"}
SUN_DIST:         89.02 [deg]   Sun_angle= -6.4 [hr] (East of Sun)
MOON_POSTN:       50.92d {+03h 23m 41s}  +23.51d {+23d 30' 52"}
MOON_DIST:       130.17 [deg]
MOON_ILLUM:      47 [%]
GAL_COORDS:       41.83, 48.35 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      229.87, 44.90 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 14 Aug 09 01:02:50 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     359951,   Seg_Num: 0
POINT_RA:        239.584d {+15h 58m 20s} (J2000)
POINT_DEC:       +25.611d {+25d 36' 39"} (J2000)
POINT_ROLL:      285.451d
IMG_START_DATE:  15057 TJD;   226 DOY;   09/08/14
IMG_START_TIME:  3466.57 SOD {00:57:46.57} UT,   327.6 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.930
N_STARS:         15
X_OFFSET:        451 [pixels]
Y_OFFSET:        781 [pixels]
X_MAX:           1410 [pixels]
Y_MAX:           1740 [pixels]
DET_THRESH:      8
PHOTO_THRESH:    4
SL_URL:          sw00359951000msufc0327.fits
SUN_POSTN:       143.77d {+09h 35m 05s}  +14.37d {+14d 22' 15"}
SUN_DIST:         89.02 [deg]   Sun_angle= -6.4 [hr] (East of Sun)
MOON_POSTN:       50.92d {+03h 23m 41s}  +23.51d {+23d 30' 52"}
MOON_DIST:       130.17 [deg]
MOON_ILLUM:      47 [%]
GAL_COORDS:       41.83, 48.35 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      229.87, 44.90 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 14 Aug 09 01:03:16 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     359951,   Seg_Num: 0
POINT_RA:        239.584d {+15h 58m 20s} (J2000)
POINT_DEC:       +25.611d {+25d 36' 39"} (J2000)
POINT_ROLL:      285.451d
IMG_START_DATE:  15057 TJD;   226 DOY;   09/08/14
IMG_START_TIME:  3466.57 SOD {00:57:46.57} UT,   327.6 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.930
N_STARS:         15
X_OFFSET:        451 [pixels]
Y_OFFSET:        781 [pixels]
X_MAX:           1410 [pixels]
Y_MAX:           1740 [pixels]
DET_THRESH:      8
PHOTO_THRESH:    4
SL_URL:          sw00359951000msufc0327.fits
SUN_POSTN:       143.77d {+09h 35m 05s}  +14.37d {+14d 22' 15"}
SUN_DIST:         89.02 [deg]   Sun_angle= -6.4 [hr] (East of Sun)
MOON_POSTN:       50.93d {+03h 23m 42s}  +23.52d {+23d 30' 55"}
MOON_DIST:       130.17 [deg]
MOON_ILLUM:      47 [%]
GAL_COORDS:       41.83, 48.35 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      229.87, 44.90 [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:     Fri 14 Aug 09 01:04:13 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     359951,   Seg_Num: 0
POINT_RA:        239.584d {+15h 58m 20s} (J2000)
POINT_DEC:       +25.611d {+25d 36' 39"} (J2000)
ROLL:            285.451d
IMG_START_DATE:  15057 TJD;   226 DOY;   09/08/14
IMG_START_TIME:  3466.57 SOD {00:57:46.57} UT,   327.6 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     271904271
X_OFFSET:        771 [pixels]
Y_OFFSET:        1101 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       931
Y_GRB_POS:       1261
BINNING_INDEX:   1
IM_URL:          sw00359951000msuni0332.fits
SUN_POSTN:       143.77d {+09h 35m 06s}  +14.37d {+14d 22' 14"}
SUN_DIST:         89.02 [deg]   Sun_angle= -6.4 [hr] (East of Sun)
MOON_POSTN:       50.94d {+03h 23m 45s}  +23.52d {+23d 31' 01"}
MOON_DIST:       130.17 [deg]
MOON_ILLUM:      47 [%]
GAL_COORDS:       41.83, 48.35 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      229.87, 44.90 [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:     Fri 14 Aug 09 01:04:37 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     359951,   Seg_Num: 0
POINT_RA:        239.584d {+15h 58m 20s} (J2000)
POINT_DEC:       +25.611d {+25d 36' 39"} (J2000)
ROLL:            285.451d
IMG_START_DATE:  15057 TJD;   226 DOY;   09/08/14
IMG_START_TIME:  3466.57 SOD {00:57:46.57} UT,   327.6 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     271904271
X_OFFSET:        771 [pixels]
Y_OFFSET:        1101 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       931
Y_GRB_POS:       1261
BINNING_INDEX:   1
IM_URL:          sw00359951000msuni0332.fits
SUN_POSTN:       143.77d {+09h 35m 06s}  +14.37d {+14d 22' 14"}
SUN_DIST:         89.02 [deg]   Sun_angle= -6.4 [hr] (East of Sun)
MOON_POSTN:       50.94d {+03h 23m 46s}  +23.52d {+23d 31' 04"}
MOON_DIST:       130.17 [deg]
MOON_ILLUM:      47 [%]
GAL_COORDS:       41.83, 48.35 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      229.87, 44.90 [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:     Fri 14 Aug 09 01:06:43 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     359951,   Seg_Num: 0
GRB_RA:          239.6101d {+15h 58m 26.42s} (J2000),
                 239.7112d {+15h 58m 50.67s} (current),
                 239.0849d {+15h 56m 20.36s} (1950)
GRB_DEC:         +25.6311d {+25d 37' 51.9"} (J2000),
                 +25.6041d {+25d 36' 14.5"} (current),
                 +25.7730d {+25d 46' 22.9"} (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:  15057 TJD;   226 DOY;   09/08/14
IMG_START_TIME:  3567.00 SOD {00:59:27.00} UT,   428.0 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       143.77d {+09h 35m 06s}  +14.37d {+14d 22' 12"}
SUN_DIST:         89.03 [deg]   Sun_angle= -6.4 [hr] (East of Sun)
MOON_POSTN:       50.96d {+03h 23m 51s}  +23.52d {+23d 31' 19"}
MOON_DIST:       130.15 [deg]
MOON_ILLUM:      47 [%]
GAL_COORDS:       41.87, 48.33 [deg] galactic lon,lat of the burst
ECL_COORDS:      229.89, 44.93 [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.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 14 Aug 09 01:09:33 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     359951,   Seg_Num: 0
POINT_RA:        239.584d {+15h 58m 20s} (J2000)
POINT_DEC:       +25.611d {+25d 36' 39"} (J2000)
POINT_ROLL:      285.451d
IMG_START_DATE:  15057 TJD;   226 DOY;   09/08/14
IMG_START_TIME:  3997.23 SOD {01:06:37.23} UT,   858.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.992
N_STARS:         190
X_OFFSET:        211 [pixels]
Y_OFFSET:        541 [pixels]
X_MAX:           1650 [pixels]
Y_MAX:           1980 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00359951000msufc0858.fits
SUN_POSTN:       143.78d {+09h 35m 06s}  +14.37d {+14d 22' 10"}
SUN_DIST:         89.01 [deg]   Sun_angle= -6.4 [hr] (East of Sun)
MOON_POSTN:       50.99d {+03h 23m 58s}  +23.53d {+23d 31' 40"}
MOON_DIST:       130.17 [deg]
MOON_ILLUM:      47 [%]
GAL_COORDS:       41.83, 48.35 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      229.87, 44.90 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 14 Aug 09 01:09:33 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     359951,   Seg_Num: 0
POINT_RA:        239.584d {+15h 58m 20s} (J2000)
POINT_DEC:       +25.611d {+25d 36' 39"} (J2000)
POINT_ROLL:      285.451d
IMG_START_DATE:  15057 TJD;   226 DOY;   09/08/14
IMG_START_TIME:  3997.23 SOD {01:06:37.23} UT,   858.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.992
N_STARS:         190
X_OFFSET:        211 [pixels]
Y_OFFSET:        541 [pixels]
X_MAX:           1650 [pixels]
Y_MAX:           1980 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00359951000msufc0858.fits
SUN_POSTN:       143.78d {+09h 35m 06s}  +14.37d {+14d 22' 10"}
SUN_DIST:         89.01 [deg]   Sun_angle= -6.4 [hr] (East of Sun)
MOON_POSTN:       50.99d {+03h 23m 58s}  +23.53d {+23d 31' 40"}
MOON_DIST:       130.17 [deg]
MOON_ILLUM:      47 [%]
GAL_COORDS:       41.83, 48.35 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      229.87, 44.90 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 14 Aug 09 01:10:11 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     359951,   Seg_Num: 0
POINT_RA:        239.584d {+15h 58m 20s} (J2000)
POINT_DEC:       +25.611d {+25d 36' 39"} (J2000)
POINT_ROLL:      285.451d
IMG_START_DATE:  15057 TJD;   226 DOY;   09/08/14
IMG_START_TIME:  3997.23 SOD {01:06:37.23} UT,   858.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.992
N_STARS:         190
X_OFFSET:        211 [pixels]
Y_OFFSET:        541 [pixels]
X_MAX:           1650 [pixels]
Y_MAX:           1980 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00359951000msufc0858.fits
SUN_POSTN:       143.78d {+09h 35m 07s}  +14.37d {+14d 22' 09"}
SUN_DIST:         89.01 [deg]   Sun_angle= -6.4 [hr] (East of Sun)
MOON_POSTN:       51.00d {+03h 23m 59s}  +23.53d {+23d 31' 44"}
MOON_DIST:       130.17 [deg]
MOON_ILLUM:      47 [%]
GAL_COORDS:       41.83, 48.35 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      229.87, 44.90 [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:     Fri 14 Aug 09 01:11:00 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     359951,   Seg_Num: 0
POINT_RA:        239.584d {+15h 58m 20s} (J2000)
POINT_DEC:       +25.611d {+25d 36' 39"} (J2000)
ROLL:            285.451d
IMG_START_DATE:  15057 TJD;   226 DOY;   09/08/14
IMG_START_TIME:  3997.23 SOD {01:06:37.23} UT,   858.2 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     271904802
X_OFFSET:        770 [pixels]
Y_OFFSET:        1100 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       930
Y_GRB_POS:       1260
BINNING_INDEX:   1
IM_URL:          sw00359951000msuni0863.fits
SUN_POSTN:       143.78d {+09h 35m 07s}  +14.37d {+14d 22' 09"}
SUN_DIST:         89.01 [deg]   Sun_angle= -6.4 [hr] (East of Sun)
MOON_POSTN:       51.00d {+03h 24m 01s}  +23.53d {+23d 31' 50"}
MOON_DIST:       130.17 [deg]
MOON_ILLUM:      47 [%]
GAL_COORDS:       41.83, 48.35 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      229.87, 44.90 [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:     Fri 14 Aug 09 01:11:28 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     359951,   Seg_Num: 0
POINT_RA:        239.584d {+15h 58m 20s} (J2000)
POINT_DEC:       +25.611d {+25d 36' 39"} (J2000)
ROLL:            285.451d
IMG_START_DATE:  15057 TJD;   226 DOY;   09/08/14
IMG_START_TIME:  3997.23 SOD {01:06:37.23} UT,   858.2 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     271904802
X_OFFSET:        770 [pixels]
Y_OFFSET:        1100 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       930
Y_GRB_POS:       1260
BINNING_INDEX:   1
IM_URL:          sw00359951000msuni0863.fits
SUN_POSTN:       143.78d {+09h 35m 07s}  +14.37d {+14d 22' 08"}
SUN_DIST:         89.01 [deg]   Sun_angle= -6.4 [hr] (East of Sun)
MOON_POSTN:       51.01d {+03h 24m 02s}  +23.53d {+23d 31' 53"}
MOON_DIST:       130.17 [deg]
MOON_ILLUM:      47 [%]
GAL_COORDS:       41.83, 48.35 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      229.87, 44.90 [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 #9793
T. N. Ukwatta (GSFC/GWU), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester), D. N. Burrows (PSU), M. M. Chester (PSU), J. R. Cummings (NASA/UMBC), P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), C. Gronwall (PSU), S. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU), C. B. Markwardt (CRESST/GSFC/UMD), F. E. Marshall (NASA/GSFC), K. L. Page (U Leicester), D. M. Palmer (LANL), M. Stamatikos (OSU/NASA/GSFC) and M. A. Stark (PSU) report on behalf of the Swift Team:
At 00:52:19 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 090814 (trigger=359951). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 239.611, +25.599 which is
```
   RA(J2000) = 15h 58m 27s
   Dec(J2000) = +25d 35' 57"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows multiple weak peaks with a total duration of about 30 seconds. The peak count rate was ~500 counts/sec (15-350 keV), at 10 sec before the trigger.
The XRT began observing the field at 00:54:58.3 UT, 159.3 seconds after the BAT trigger. Using promptly downlinked data we find a bright, fading, uncatalogued X-ray source with an enhanced position: RA, Dec 239.6095, 25.6310 which is equivalent to:
```
   RA(J2000)  = 15h 58m 26.29s
   Dec(J2000) = +25d 37' 51.7"
```
with an uncertainty of 2.2 arcseconds (radius, 90% containment). This location is 115 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 consistent with the Galactic value of 4.76e+20 cm^-2 (Kalberla et al. 2005).
The initial flux in the 2.5 s image was 1.65e-09 erg cm^-2 s^-1 (0.2-10 keV).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 169 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 3-sigma UL at the XRT position is 19.2 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.08.
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 #9794
GRB 090814: GROND Detection of an Optical Afterglow Candidate
Adria Updike (Clemson University), Felipe Olivares, Paulo Afonso, Abdullah Yoldas, Jochen Greiner (all MPE Garching) report on behalf of the GROND team:
We observed the field of GRB 090814 (Swift trigger 359951; Ukwatta et al., GCN #9793) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2 m ESO/MPI telescope at La Silla Observatory (Chile).
Observations started at 00:59 UT on Aug 14 2009, 7 minutes after the GRB trigger. They were performed at an average seeing of 1" and at an average airmass of 2.2.
We found a single point source within the Swift-XRT error circle reported by Ukwatta et al. (GCN #9793) at
```
RA (J2000.0) = 15 h 58 m 26.35 s
DEC (J2000.0) = +25d 37' 52.4" 
```
with an uncertainty of 0.5". The candidate afterglow has the following preliminary AB magnitudes obtained from a first 140s g'r' exposure and 240s in the nIR:
```
g' = 21.62 +/- 0.04
r' = 21.21 +/- 0.04
J > 21.1
H > 19.2 
```
calibrated against SDSS and 2MASS catalogs. No extinction correction was applied. Ongoing data reduction suggests the source is fading.
GCN Circular #9796
A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team.
Using 2113 s of XRT Photon Counting mode data and 1 UVOT images for GRB 090814, 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 = 239.61014, +25.63088 which is equivalent to:
```
RA (J2000): 15h 58m 26.43s
Dec (J2000): +25d 37' 51.2"
```
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, arXiv:0812.3662).
This circular was automatically generated, and is an official product of the Swift-XRT team.
GCN Circular #9797
P. Jakobsson (Univ. Iceland), A. de Ugarte Postigo (INAF-OAB), J. Gorosabel (IAA-CSIC), N. Tanvir (Leicester), L. Christensen (ESO), J.P.U. Fynbo (DARK/NBI) report on behalf of a larger collaboration,
We have observed the field of GRB 090814A (Ukwatta et al. GCN 9793) using FORS2 at the VLT (Paranal observatory) starting at 02:05 UT (70 minutes after the burst). We detect the object identified by Updike et al. (GCN 9794) with a magnitude of R~21.5.
The spectrum shows continuum down to at least 3900 Angstroms. Non detection of Ly-alpha implies a limit of z < 2.2. We identify a weak absorption system at z=0.696 through the detection of MgII and CaII. This is therefore likely to be the redshift of the GRB but we note that it could also be produced by an intervening system and thus the strict redshift range for this GRB would be 0.696 < z < 2.2.
We acknowledge the excelent support from Parnal observatory, in particular J. Smoker and L. Rivas.
GCN Circular #9799
H. A. Krimm (GSFC/USRA), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC), C. B. Markwardt (GSFC/UMD), D. M. Palmer (LANL), A. M. Parsons (GSFC), T. Sakamoto (GSFC/UMBC), G. Sato (ISAS), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC), T. N. Ukwatta (GWU) (i.e. the Swift-BAT team):
Using the data set from T-239 to T+963 sec from recent telemetry downlinks, we report further analysis of BAT GRB 090814A (trigger #359951) (Ukwatta, et al., GCN Circ. 9793). The BAT ground-calculated position is RA, Dec = 239.613, 25.586 deg which is
```
   RA(J2000)  =  15h 58m 27.2s 
   Dec(J2000) = +25d 35' 09.0" 
```
with an uncertainty of 2.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 37%.
The mask-weighted light curve shows a few semi-overlapping peaks starting at ~T-18 sec, peaking at ~T-13 sec, peaking at ~T+8 sec, and ending at ~T+115 sec. There is possible 10-sec precursor peak (3 sigma) at ~T-145 sec. T90 (15-350 keV) is 80 +- 8 sec (estimated error including systematics).
The time-averaged spectrum from T-16.4 to T+73.6 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.81 +- 0.19. The fluence in the 15-150 keV band is 1.3 +- 0.2 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T-12.68 sec in the 15-150 keV band is 0.6 +- 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/359951/BA/
GCN Circular #9800
A.Daikyuji, K.Noda, H.hayasi, K.Kono, N.Ohmori, E.Sonoda, M.Yamauchi (University of Miyazaki)
We have observed the field covering the error circle of GRB 090814A (Swift trigger 359951, GCN 9793, T. N. Ukwatta et al.) with the unfiltered CCD camera on the 30-cm telescope at University of Miyazaki. The observation was started 00:59 UT, about 11 hr after the Swift trigger time. We have compared our data of 30 sec exposures with the USNO-A2.0 catalog, There is no new source at the reported position. ((GCN9794(Adria Updike et al.))
the upper limits are as follows:
```
--------------------------------------------------------------
Start(UT) End(UT) Num. of frames Limit (mag.)
--------------------------------------------------------------
11:08:33    11:09:03         1            16.2
11:08:33    11:48:08        36            17.3
---------------------------------------------------------------
```
GCN Circular #9801
K.L. Page (U. Leicester) & T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift-XRT team:
We have analysed the first four orbits of data collected for GRB 090814A, from 165 s to 25.7 ks after the BAT trigger. These data comprise 258 s in Windowed Timing (WT) mode and 7.8 ks in Photon Counting mode. The enhanced XRT position for this burst was given by Beardmore et al. in GCN Circ. 9796.
The light curve can be modelled with a series of power-law decays, starting with alpha1 = 2.60 +/- 0.08 until ~T+830 s, at which point the decay flattens slightly to alpha2 = 1.91 +/- 0.20. The light curve flattens again at ~T+5.4 ks, to a slope of alpha3 = 0.51 +/- 0.48. With the limited data at this time, alpha3 has a relatively large uncertainty.
The spectrum extracted from the WT data can be fitted with an absorbed power-law, with Gamma = 2.78 +0.12/-0.11, absorbed by the Galactic column of NH = 4.76 x 10^20 cm^-2 (Kalberla et al. 2005), together with an intrinsic column (assuming z = 0.696; Jakobsson et al., GCN Circ. 9797) of (2.0 +/- 0.4) x 10^21 cm^-2. Note, however, that this redshift determination is uncertain. The total (including Galactic) column at z = 0 would be (1.3 +/- 0.2) x 10^21 cm^-2. Alternatively, the spectrum is better fitted (at >3 sigma) by a broken power-law with Gamma1 = 0.47 +0.72/-1.59 below a break energy of 0.62 +0.09/-0.08 keV, followed by Gamma2 = 2.62 +/- 0.09; this fit only requires the Galactic column. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from the broken power-law fit is 2.5 x 10^-11 (3.0 x 10^-11) erg cm^-2 count^-1.
If the light curve continues to decay with a power-law decay index of 0.51, the count rate at T+24 hours will be 0.0041 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 1.0 x 10^-13 (1.2 x 10^-13) erg cm^-2 s^-1.
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00359951.
This circular is an official product of the Swift-XRT team.
GCN Circular #9802
P.A. Curran (MSSL-UCL), T. N. Ukwatta (GSFC/GWU), report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 090814A 170s after the BAT trigger (Ukwatta et al., GCN 9793). The proposed optical counterpart (Updike et al. , GCN 9794) is marginally detected in the u and white UVOT exposures. No optical afterglow consistent with the enhanced XRT position (Beardmore et al., GCN 9796) is detected in the other UVOT exposures.
Preliminary magnitudes and 3-sigma upper limits using the UVOT photometric system (Poole et al. 2008, MNRAS, 383, 627) for for the first finding charts (FC) and subsequent exposures are:
```
Filter  T_start(s) T_stop(s)   Exp(s)  Mag

u       328	   577          246	> 20.16 (FC)
wh      170	   319          147	> 20.70 (FC)				
u       328	   8144         834	21.05 +/- 0.35
b       584	   8340         599	> 21.30
v       658	   7528         607	> 20.18		
w1      708	   7939         529	> 20.66
m2      683	   7733         529	> 20.5
w2      708	   7939         607	> 20.81				
wh      170	   7117         699	21.54 +/- 0.27
```
The values quoted above are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.078 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #9809
D. Xu, J.P.U. Fynbo (DARK/NBI), P. Jakobsson (Univ. Iceland), Tiina Liimets (NOT) report on behalf of a larger collaboration:
We observed the field of GRB 090814A (Ukwatta et al. GCN 9793; Updike et al., GCN 9794) with the Nordic Optical Telescope equipped with ALFOSC. We obtained 3x600 s R-band frames staring on August 14th, 21:15:11 UT, 20.38 hr after the burst.
The optical afterglow is clearly detected in each frame. The magnitude is R~22.4 calibrated against the reference star, #1156-0231252 with R2=19.25, of the USNO B1 catalog.
Compared with the previous measurement of R~21.5 around 70 mins after the burst (Jakobsson et al., GCN 9797), the afterglow is decaying quite shallowly, with a power-law slope of ~0.3, being consistent with the X-ray decaying law during the same period (Page & Ukwatta, GCN 9801).
GCN Circular #9818
V. Rumyantsev (CrAO) and A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration:
We observed the field of GRB 090814A (Ukwatta et al. GCN 9793; Updike et al., GCN 9794) with Shajn telescope of CrAO on Aug. 14 between (UT) 19:02:44 - 19:56:58 under modarate seeing of about 1.9 arcsec. We detect afterglow in a stacked image. The coordinates of the afterglow are (J2000) 15 58 26.36 +25 37 52.32 in a full agreement with reported earlier (A. Updike et al., GCN 9794). The photometry against nearby USNO-B1.0 star 15 58 23.11 +25 39 07.2 16.64 R is following:
```
T0+     Filter, Exposure, mag.,     err.
(d)                (s)

   R     51x60     22.10 +/- 0.08
```
We confirm the shallow decay of the afterglow (D. Xu et al., GCN 9809) with power law index ~0.3.
GCN Report 238.1
GCN_Report 238.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_238_1.pdf by T.N. Ukwatta at GSFC/GWU titled: "Final Results on Swift GRB 090814A"
GCN Circular #9903
J. Haislip, D. Reichart, K. Ivarsen, A. Smith, D. Caton, L. Hawkins, L. Cominsky, K. McLin, T. Graves, G. Spear, A. LaCluyze, A. Foster, J. Moore, A. Oza, M. Schubel, J. Styblova, A. Trotter, J. A. Crain, and M. Nysewander report:
Skynet observed the Swift/BAT localization of GRB 090814A (Ukwatta et al., GCN 9793) with the 14" Dark Sky Observatory telescope in North Carolina beginning 71.1 minutes after the trigger in RI through variable cloud cover.
Skynet continued observing with the 14" GORT telescope at Hume Observatory in California beginning 3.3 hours after the the trigger in RI.
We do not detect the afterglow (Updike et al., GCN 9794). Stacking only images that increase the limiting magnitude yields:
```
mean
time                                    3-sigma    secondary
since                                   limiting   calibration
trigger  telescope  exposures   filter  magnitude  stars *

75.4 m   DSO-14     2 x 160 s   I       18.5       13 SDSS 6
                     + 1 x 80 s
86.4 m   DSO-14     4 x 160 s   R       19.2       9 SDSS 6
96.6 m   DSO-14     3 x 160 s   I       17.8       13 SDSS 6
105.3 m  DSO-14     1 x 160 s   R       16.9       9 SDSS 6
4.7 h    GORT       35 x 80 s   I       20.1       8 SDSS 6
5.2 h    GORT       40 x 80 s   R       20.8       7 SDSS 6
24.9 h   DSO-14     11 x 160 s  R       20.0       9 SDSS 6
```
* Transformed using Jester et al., 2005, ApJ, 130, 873.

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Jochen Greiner, last update: 09-Sep-2009 [Disclaimer]