Gamma-ray Burst 200907B

(All information courtesy of the instrument teams.)

Previous IAU Circulars

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Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 07 Sep 20 18:51:35 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     995004,   Seg_Num: 0
GRB_RA:           89.013d {+05h 56m 03s} (J2000),
                  89.292d {+05h 57m 10s} (current),
                  88.339d {+05h 53m 21s} (1950)
GRB_DEC:          +6.911d {+06d 54' 38"} (J2000),
                  +6.912d {+06d 54' 44"} (current),
                  +6.904d {+06d 54' 15"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       1095 [cnts]    Image_Peak=115 [image_cnts]
TRIGGER_DUR:     0.256 [sec] 
TRIGGER_INDEX:   481     E_range: 50-350 keV
BKG_INTEN:       16520 [cnts]
BKG_TIME:        67854.40 SOD {18:50:54.40} UT
BKG_DUR:         8 [sec]
GRB_DATE:        19099 TJD;   251 DOY;   20/09/07
GRB_TIME:        67871.17 SOD {18:51:11.17} UT
GRB_PHI:         149.21 [deg]
GRB_THETA:        23.59 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     23.40 [sigma]
IMAGE_SIGNIF:    9.45 [sigma]
MERIT_PARAMS:     +1  +0  +0  -2  +3  +0  +0  +1 -22  +0 
SUN_POSTN:       166.74d {+11h 06m 59s}   +5.68d {+05d 40' 32"}
SUN_DIST:         76.91 [deg]   Sun_angle= 5.2 [hr] (West of Sun)
MOON_POSTN:       45.30d {+03h 01m 13s}  +13.91d {+13d 54' 43"}
MOON_DIST:        43.76 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      200.33, -9.01 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       88.98,-16.53 [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 = 212.23,-15.00 [deg].

red DSS finding chart ps-file

GCN NOTICE

 
TITLE:           GCN/SWIFT NOTICE 
NOTICE_DATE:     Mon 07 Sep 20 18:52:40 UT 
NOTICE_TYPE:     Swift-XRT Nack-Position 
TRIGGER_NUM:     995004,   Seg_Num: 0 
POINT_RA:         89.019d {+05h 56m 04s} (J2000) 
POINT_DEC:        +6.915d {+06d 54' 55"} (J2000) 
IMG_START_DATE:  19099 TJD;   251 DOY;   20/09/07 
IMG_START_TIME:  67951.33 SOD {18:52:31.33} UT,   80.2 [sec] since BAT Trigger Time 
COUNTS:          7    Min_needed= 20 
STD_DEV:         0.00   Max_StdDev_for_Good=28.44 [arcsec] 
PH2_ITER:        1    Max_iter_allowed= 4 
ERROR_CODE:      1 
COMMENTS:        SWIFT-XRT Nack Position.   
COMMENTS:        No source found in the image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 07 Sep 20 18:55:21 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     995004,   Seg_Num: 0
GRB_RA:           89.013d {+05h 56m 03s} (J2000),
                  89.292d {+05h 57m 10s} (current),
                  88.339d {+05h 53m 21s} (1950)
GRB_DEC:          +6.911d {+06d 54' 38"} (J2000),
                  +6.912d {+06d 54' 44"} (current),
                  +6.904d {+06d 54' 15"} (1950)
GRB_DATE:        19099 TJD;   251 DOY;   20/09/07
GRB_TIME:        67871.17 SOD {18:51:11.17} UT
TRIGGER_INDEX:   481
GRB_PHI:         149.21 [deg]
GRB_THETA:        23.59 [deg]
DELTA_TIME:      -75.00 [sec]
TRIGGER_DUR:     0.256 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     23.40 [sigma]
IMAGE_SIGNIF:    9.45 [sigma]
LC_URL:          sw00995004000msb.lc
SUN_POSTN:       166.75d {+11h 06m 59s}   +5.67d {+05d 40' 29"}
SUN_DIST:         76.91 [deg]   Sun_angle= 5.2 [hr] (West of Sun)
MOON_POSTN:       45.33d {+03h 01m 20s}  +13.92d {+13d 55' 22"}
MOON_DIST:        43.73 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      200.33, -9.01 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       88.98,-16.53 [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 = 212.23,-15.00 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 07 Sep 20 18:56:25 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     995004,   Seg_Num: 0
POINT_RA:         89.019d {+05h 56m 04s} (J2000)
POINT_DEC:        +6.915d {+06d 54' 54"} (J2000)
POINT_ROLL:      85.712d
IMG_START_DATE:  19099 TJD;   251 DOY;   20/09/07
IMG_START_TIME:  67954.78 SOD {18:52:34.78} UT,   83.6 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        5.029
N_STARS:         80
X_OFFSET:        445 [pixels]
Y_OFFSET:        597 [pixels]
X_MAX:           1404 [pixels]
Y_MAX:           1556 [pixels]
DET_THRESH:      19
PHOTO_THRESH:    11
SL_URL:          sw00995004000msufc0083.fits
SUN_POSTN:       166.75d {+11h 06m 59s}   +5.67d {+05d 40' 28"}
SUN_DIST:         76.91 [deg]   Sun_angle= 5.2 [hr] (West of Sun)
MOON_POSTN:       45.34d {+03h 01m 22s}  +13.93d {+13d 55' 32"}
MOON_DIST:        43.73 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      200.33, -9.00 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       88.98,-16.52 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 07 Sep 20 18:56:46 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     995004,   Seg_Num: 0
POINT_RA:         89.019d {+05h 56m 04s} (J2000)
POINT_DEC:        +6.915d {+06d 54' 54"} (J2000)
POINT_ROLL:      85.712d
IMG_START_DATE:  19099 TJD;   251 DOY;   20/09/07
IMG_START_TIME:  67954.78 SOD {18:52:34.78} UT,   83.6 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        5.029
N_STARS:         80
X_OFFSET:        445 [pixels]
Y_OFFSET:        597 [pixels]
X_MAX:           1404 [pixels]
Y_MAX:           1556 [pixels]
DET_THRESH:      19
PHOTO_THRESH:    11
SL_URL:          sw00995004000msufc0083.fits
SUN_POSTN:       166.75d {+11h 06m 59s}   +5.67d {+05d 40' 27"}
SUN_DIST:         76.91 [deg]   Sun_angle= 5.2 [hr] (West of Sun)
MOON_POSTN:       45.34d {+03h 01m 22s}  +13.93d {+13d 55' 36"}
MOON_DIST:        43.73 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      200.33, -9.00 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       88.98,-16.52 [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:     Mon 07 Sep 20 18:56:47 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     995004,   Seg_Num: 0
GRB_RA:           89.0282d {+05h 56m 06.76s} (J2000),
                  89.3072d {+05h 57m 13.72s} (current),
                  88.3540d {+05h 53m 24.95s} (1950)
GRB_DEC:          +6.9074d {+06d 54' 26.6"} (J2000),
                  +6.9091d {+06d 54' 32.6"} (current),
                  +6.9010d {+06d 54' 03.7"} (1950)
GRB_ERROR:       3.8 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  19099 TJD;   251 DOY;   20/09/07
IMG_START_TIME:  67961.00 SOD {18:52:41.00} UT,   89.8 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       166.75d {+11h 06m 59s}   +5.67d {+05d 40' 27"}
SUN_DIST:         76.90 [deg]   Sun_angle= 5.2 [hr] (West of Sun)
MOON_POSTN:       45.34d {+03h 01m 22s}  +13.93d {+13d 55' 36"}
MOON_DIST:        43.74 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      200.34, -9.00 [deg] galactic lon,lat of the burst
ECL_COORDS:       88.99,-16.53 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        TAM values, flux and significance fields are not valid.  
COMMENTS:        This position was automatically generated on the ground using  
COMMENTS:        Photon Counting data telemetered via TDRSS (SPER data).  
COMMENTS:        See http://www.swift.ac.uk/sper/docs.php for details.  
COMMENTS:        The probability that this is a serendipitous source in the  
COMMENTS:        SPER window is 0.58% < P(seren) < 1.1%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 07 Sep 20 18:58:34 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     995004,   Seg_Num: 0
POINT_RA:         89.019d {+05h 56m 04s} (J2000)
POINT_DEC:        +6.915d {+06d 54' 54"} (J2000)
ROLL:            85.712d
IMG_START_DATE:  19099 TJD;   251 DOY;   20/09/07
IMG_START_TIME:  67954.78 SOD {18:52:34.78} UT,   83.6 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     621197580
X_OFFSET:        764 [pixels]
Y_OFFSET:        916 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       924
Y_GRB_POS:       1076
BINNING_INDEX:   1
IM_URL:          sw00995004000msuni0109.fits
SUN_POSTN:       166.75d {+11h 07m 00s}   +5.67d {+05d 40' 26"}
SUN_DIST:         76.91 [deg]   Sun_angle= 5.2 [hr] (West of Sun)
MOON_POSTN:       45.36d {+03h 01m 26s}  +13.93d {+13d 55' 54"}
MOON_DIST:        43.71 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      200.33, -9.00 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       88.98,-16.52 [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:     Mon 07 Sep 20 18:58:48 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     995004,   Seg_Num: 0
POINT_RA:         89.019d {+05h 56m 04s} (J2000)
POINT_DEC:        +6.915d {+06d 54' 54"} (J2000)
ROLL:            85.712d
IMG_START_DATE:  19099 TJD;   251 DOY;   20/09/07
IMG_START_TIME:  67954.78 SOD {18:52:34.78} UT,   83.6 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     621197580
X_OFFSET:        764 [pixels]
Y_OFFSET:        916 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       924
Y_GRB_POS:       1076
BINNING_INDEX:   1
IM_URL:          sw00995004000msuni0109.fits
SUN_POSTN:       166.75d {+11h 07m 00s}   +5.67d {+05d 40' 26"}
SUN_DIST:         76.91 [deg]   Sun_angle= 5.2 [hr] (West of Sun)
MOON_POSTN:       45.36d {+03h 01m 26s}  +13.93d {+13d 55' 57"}
MOON_DIST:        43.71 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      200.33, -9.00 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       88.98,-16.52 [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:     Mon 07 Sep 20 19:06:43 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     995004,   Seg_Num: 0
POINT_RA:         89.019d {+05h 56m 05s} (J2000)
POINT_DEC:        +6.914d {+06d 54' 51"} (J2000)
POINT_ROLL:      85.711d
IMG_START_DATE:  19099 TJD;   251 DOY;   20/09/07
IMG_START_TIME:  68167.22 SOD {18:56:07.22} UT,   296.1 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        2.260
N_STARS:         109
X_OFFSET:        205 [pixels]
Y_OFFSET:        357 [pixels]
X_MAX:           1644 [pixels]
Y_MAX:           1796 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00995004000msufc0296.fits
SUN_POSTN:       166.75d {+11h 07m 01s}   +5.67d {+05d 40' 18"}
SUN_DIST:         76.91 [deg]   Sun_angle= 5.2 [hr] (West of Sun)
MOON_POSTN:       45.42d {+03h 01m 41s}  +13.95d {+13d 57' 17"}
MOON_DIST:        43.65 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      200.33, -9.00 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       88.98,-16.52 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 07 Sep 20 19:07:20 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     995004,   Seg_Num: 0
POINT_RA:         89.019d {+05h 56m 05s} (J2000)
POINT_DEC:        +6.914d {+06d 54' 51"} (J2000)
ROLL:            85.711d
IMG_START_DATE:  19099 TJD;   251 DOY;   20/09/07
IMG_START_TIME:  68167.22 SOD {18:56:07.22} UT,   296.1 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     621197792
X_OFFSET:        764 [pixels]
Y_OFFSET:        916 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       924
Y_GRB_POS:       1076
BINNING_INDEX:   1
IM_URL:          sw00995004000msuni0322.fits
SUN_POSTN:       166.75d {+11h 07m 01s}   +5.67d {+05d 40' 18"}
SUN_DIST:         76.91 [deg]   Sun_angle= 5.2 [hr] (West of Sun)
MOON_POSTN:       45.43d {+03h 01m 43s}  +13.96d {+13d 57' 24"}
MOON_DIST:        43.65 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      200.33, -9.00 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       88.98,-16.52 [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:     Mon 07 Sep 20 19:07:36 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     995004,   Seg_Num: 0
POINT_RA:         89.019d {+05h 56m 05s} (J2000)
POINT_DEC:        +6.914d {+06d 54' 51"} (J2000)
ROLL:            85.711d
IMG_START_DATE:  19099 TJD;   251 DOY;   20/09/07
IMG_START_TIME:  68167.22 SOD {18:56:07.22} UT,   296.1 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     621197792
X_OFFSET:        764 [pixels]
Y_OFFSET:        916 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       924
Y_GRB_POS:       1076
BINNING_INDEX:   1
IM_URL:          sw00995004000msuni0322.fits
SUN_POSTN:       166.75d {+11h 07m 01s}   +5.67d {+05d 40' 17"}
SUN_DIST:         76.91 [deg]   Sun_angle= 5.2 [hr] (West of Sun)
MOON_POSTN:       45.43d {+03h 01m 43s}  +13.96d {+13d 57' 26"}
MOON_DIST:        43.65 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      200.33, -9.00 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       88.98,-16.52 [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:     Mon 07 Sep 20 19:07:12 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     995004,   Seg_Num: 0
GRB_RA:           89.0288d {+05h 56m 06.91s} (J2000),
                  89.3078d {+05h 57m 13.86s} (current),
                  88.3546d {+05h 53m 25.09s} (1950)
GRB_DEC:          +6.9062d {+06d 54' 22.3"} (J2000),
                  +6.9079d {+06d 54' 28.3"} (current),
                  +6.8998d {+06d 53' 59.4"} (1950)
GRB_ERROR:       2.2 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  19099 TJD;   251 DOY;   20/09/07
IMG_START_TIME:  67961.00 SOD {18:52:41.00} UT,   89.8 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       166.75d {+11h 07m 01s}   +5.67d {+05d 40' 18"}
SUN_DIST:         76.90 [deg]   Sun_angle= 5.2 [hr] (West of Sun)
MOON_POSTN:       45.43d {+03h 01m 42s}  +13.96d {+13d 57' 22"}
MOON_DIST:        43.66 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      200.35, -9.00 [deg] galactic lon,lat of the burst
ECL_COORDS:       88.99,-16.53 [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:     Mon 07 Sep 20 19:07:01 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     995004,   Seg_Num: 0
POINT_RA:         89.019d {+05h 56m 05s} (J2000)
POINT_DEC:        +6.914d {+06d 54' 51"} (J2000)
POINT_ROLL:      85.711d
IMG_START_DATE:  19099 TJD;   251 DOY;   20/09/07
IMG_START_TIME:  68167.22 SOD {18:56:07.22} UT,   296.1 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        2.260
N_STARS:         109
X_OFFSET:        205 [pixels]
Y_OFFSET:        357 [pixels]
X_MAX:           1644 [pixels]
Y_MAX:           1796 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00995004000msufc0296.fits
SUN_POSTN:       166.75d {+11h 07m 01s}   +5.67d {+05d 40' 18"}
SUN_DIST:         76.91 [deg]   Sun_angle= 5.2 [hr] (West of Sun)
MOON_POSTN:       45.42d {+03h 01m 42s}  +13.96d {+13d 57' 21"}
MOON_DIST:        43.65 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      200.33, -9.00 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       88.98,-16.52 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN Circular #28384
A. P. Beardmore (U Leicester), S. D. Barthelmy (GSFC), J. A. Kennea (PSU), N. J. Klingler (PSU), S. Laha (GSFC/UMBC/CRESST), A. Y. Lien (GSFC/UMBC), F. E. Marshall (NASA/GSFC), K. L. Page (U Leicester), D. M. Palmer (LANL) and A. Tohuvavohu (U Toronto) report on behalf of the Neil Gehrels Swift Observatory Team:
At 18:51:11 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 200907B (trigger=995004). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 89.013, +6.911 which is
```
   RA(J2000) = 05h 56m 03s
   Dec(J2000) = +06d 54' 38"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a multi-peaked structure with a duration of about 1 sec. The peak count rate was ~4000 counts/sec (15-350 keV), at ~0 sec after the trigger.
The XRT began observing the field at 18:52:31.3 UT, 80.1 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source located at RA, Dec 89.02837, 6.90752 which is equivalent to:
```
   RA(J2000)  = 05h 56m 06.81s
   Dec(J2000) = +06d 54' 27.1"
```
with an uncertainty of 3.8 arcseconds (radius, 90% containment). This location is 56 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 https://www.swift.ac.uk/sper. We cannot determine whether the source is fading at the present time.
A power-law fit to a spectrum formed from promptly downlinked event data gives a column density consistent with the Galactic value of 4.23 x 10^21 cm^-2 (Willingale et al. 2013).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 83 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 0.61.
Burst Advocate for this burst is A. P. Beardmore (apb AT star.le.ac.uk). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/)
GCN Circular #28385
P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT team:
Using promptly downlinked XRT event data for GRB 200907B, we find an enhanced XRT position of the afterglow: RA, Dec: 89.0289, 6.9063 which is equivalent to:
```
 
   RA (J2000)  = 05 56 06.93 
   Dec (J2000) = +06 54 22.8 
```
with an uncertainty of 2.2 arcseconds (radius, 90% confidence). Analysis of the promptly available data is online at http://www.swift.ac.uk/sper/995004.
Position enhancement is is described by Goad et al. (2007, A&A, 476, 1401) and Evans et al. (2009, MNRAS, 397, 1177).
This circular is an official product of the Swift-XRT team.
GCN Circular #28387
H. Kumar (IITB), P. Dorje (IIA), V. Bhalerao(IITB), G. C. Anupama(IIA), S. Barway(IIA), report on behalf of the GROWTH-India collaboration:
We observed GRB200907A reported by Swift-BAT (A.P. Beardmore et al., GCN #28384, P.A. Evans et al., GCN #28385) with 0.7m GROWTH-India telescope. The field was observed in the SDSS r filter starting at 2020-09-07T20:59:05.36 UT i.e. ~2.1 hrs after the event detection by Swift-BAT. We didn’t find any new source in stacked image of 7*500 sec exposure, within an uncertainty region of 2.2 arcsec around RA(J2000) = 05:56:06.93, Dec(J2000)= +06:54:22.8 (GCN 28385) up to r > 20.83 mag (5-sigma)(Calibrated against PanSTARRs PS1 data release, Flewelling et al., 2018)
The GROWTH India Telescope (GIT) is a 70-cm telescope with a 0.7-degree field of view, set up by the Indian Institute of Astrophysics and the Indian Institute of Technology Bombay with support from the Indo-US Science and Technology Forum (IUSSTF) and the Science and Engineering Research Board (SERB) of the Department of Science and Technology (DST), Government
of India (https://sites.google.com/view/growthindia/). It is located at the Indian Astronomical Observatory (Hanle), operated by the Indian Institute of Astrophysics (IIA).
GCN Circular #28388
H. Kumar (IITB), P. Dorje (IIA), V. Bhalerao(IITB), G. C. Anupama(IIA), S. Barway(IIA), report on behalf of the GROWTH-India collaboration:
We apologize for the confusion caused in GRB name. GROWTH-India Telescope followed-up GRB 200907B, not GRB 200907A.
Here is the corrected GCN:-
We observed GRB 200907B reported by Swift-BAT (A.P. Beardmore et al., GCN #28384, P.A. Evans et al., GCN #28385) with 0.7m GROWTH-India telescope. The field was observed in the SDSS r filter starting at 2020-09-07T20:59:05.36 UT i.e. ~2.1 hrs after the event detection by Swift-BAT. We didn�??t find any new source in stacked image of 7*500 sec exposure, within an uncertainty region of 2.2 arcsec around RA(J2000) = 05:56:06.93, Dec(J2000)= +06:54:22.8 (GCN 28385) up to r > 20.83 mag (5-sigma) (calibrated against PanSTARRs PS1 data release, Flewelling et al., 2018).
The GROWTH India Telescope (GIT) is a 70-cm telescope with a 0.7-degree field of view, set up by the Indian Institute of Astrophysics and the Indian Institute of Technology Bombay with support from the Indo-US Science and Technology Forum (IUSSTF) and the Science and Engineering Research Board (SERB) of the Department of Science and Technology (DST), Government of India (https://sites.google.com/view/growthindia/). It is located at the Indian Astronomical Observatory (Hanle), operated by the Indian Institute of Astrophysics (IIA).
GCN Circular #28391
P.A. Evans, M.R. Goad, J.P. Osborne and A.P. Beardmore (U. Leicester) report on behalf of the Swift-XRT team.
Using 742 s of XRT Photon Counting mode data and 1 UVOT images for GRB 200907B, 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 = 89.02906, +6.90625 which is equivalent to:
```
RA (J2000): 05h 56m 6.97s
Dec (J2000): +06d 54' 22.5"
```
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 #28392
V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, F.Balakin, V.Vladimirov, D. Vlasenko, I.Gorbunov, D.Zimnukhov, V.Senik, T.Pogrosheva, D.Kuvshinov, D. Cheryasov (Lomonosov Moscow State University, SAI, Physics Department),
R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico Felix Aguilar OAFA),
R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias),
D. Buckley (South African Astronomical Observatory),
O.A. Gres, N.M. Budnev, O.Ershova (Irkutsk State University, API),
A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory),
V. Yurkov, A. Gabovich, Yu. Sergienko (Blagoveschensk Educational State University)
MASTER-Tavrida robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, SAI Crimea astronomical station) was pointed to the Swift GRB 200907B ( A. P. Beardmore et al., GCN 28384) errorbox 22142 sec after notice time and 22169 sec after trigger time at 2020-09-08 01:00:40 UT, with upper limit up to 17.6 mag. The observations began at zenith distance = 59 deg. The sun altitude is -23.0 deg.
MASTER-SAAO robotic telescope located in South Africa (South African Astronomical Observatory) was pointed to the Swift GRB 200907B errorbox 22375 sec after notice time and 22402 sec after trigger time at 2020-09-08 01:04:33 UT, with upper limit up to 15.9 mag. The observations began at zenith distance = 73 deg. The sun altitude is -46.6 deg.
The galactic latitude b = -8 deg., longitude l = 201 deg.
Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1435309
We obtain a following upper limits.
```
Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________

   22260 |      MASTER-Tavrida |   C |   180 | 17.3 |        
   22461 |      MASTER-Tavrida |   C |   180 | 17.6 |        
   22493 |         MASTER-SAAO |   C |   180 | 15.9 |        
```
Filter C is a clear (unfiltred) band.
The observation and reduction will continue. The message may be cited.
GCN Circular #28393
R. Hosokawa, K. L. Murata, R. Adachi, M. Niwano, F. Ogawa, N. Nakamura, N. Ito, S. Ogata, H. Takamatsu, H. Hara, Y. Yatsu, and N. Kawai (TokyoTech) report on behalf of the MITSuME collaboration:
We observed the field of GRB 200907B (Beardmore et al., GCN 28384; Evans et al., GCN 28385,28391) with the optical three color (g', Rc, and Ic) CCD cameras attached to the MITSuME 50 cm telescope of Okayama Astrophysical Observatory, Okayama, Japan.
The observation with a series of 60 sec exposures started at 2020-09−07 18:52:16UT. We did not find any new point sources within the enhanced Swift/XRT error circle (Evans et al., GCN 28391) in the 60 sec exposure images and the stacked images. We obtained the 5-sigma limits of the stacked images as follows.
```
T0+[sec] MID-UT T-EXP[sec] 5-sigma limits
------------------------------------------------------------------------------------------------
65 2020-09-07T19:19:48 2100 g'>17.1, Rc>17.9, Ic>17.3
------------------------------------------------------------------------------------------------
T0+: Elapsed time after the burst
T-EXP: Total Exposure time
```
We used the PS1 catalog for flux calibration. The magnitudes are expressed in the AB system. The images were processed in real-time through the MITSuME GPU reduction pipeline (Niwano et al., accepted for publication in PASJ, https://arxiv.org/abs/2008.11486; https://github.com/MNiwano/Eclaire).
GCN Circular #28394
M. Capalbi (INAF-IASFPA), M. Perri (ASDC), V. D'Elia (ASDC), D.N. Burrows (PSU), J. D. Gropp (PSU), J.A. Kennea (PSU), P.A. Evans (U. Leicester), J.P. Osborne (U. Leicester) and A.P. Beardmore report on behalf of the Swift-XRT team:
We have analysed 6.7 ks of XRT data for GRB 200907B (Beardmore et al. GCN Circ. 28384), from 83 s to 18.0 ks after the BAT trigger. The data comprise 5 s in Windowed Timing (WT) mode with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Evans et al. (GCN Circ. 28385).
The light curve can be modelled with a power-law decay with a decay index of alpha=2.09 (+/-0.18).
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 1.9 (+0.5, -0.4). The best-fitting absorption column is 5.7 (+3.0, -1.4) x 10^21 cm^-2, consistent with the Galactic value of 4.2 x 10^21 cm^-2 (Willingale et al. 2013). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 4.4 x 10^-11 (7.1 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     5.7 (+3.0, -1.4) x 10^21 cm^-2
Galactic foreground: 4.2 x 10^21 cm^-2
Excess significance: <1.6 sigma
Photon index:	     1.9 (+0.5, -0.4)
```
If the light curve continues to decay with a power-law decay index of 2.09, the count rate at T+24 hours will be 1.3 x 10^-6 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 5.8 x 10^-17 (9.2 x 10^-17) erg cm^-2 s^-1.
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00995004.
This circular is an official product of the Swift-XRT team.
GCN Circular #28395
S. Gupta, V. Sharma and D. Bhattacharya (IUCAA), V. Bhalerao (IIT-B), A. R. Rao (IUCAA/TIFR) and S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration:
Analysis of AstroSat CZTI data showed a weak detection of a short GRB 200907B, which was also detected by Swift (Beardmore A. et al., GCN #28384), Swift-XRT (Evans P. et al., GCN #28385), GROWTH-India optical (Kumar H. et al., GCN #28388), Global MASTER-Net (Lipunov V. et al., GCN #28392), and MITSuME Okayama optical (Hosokawa R. et al., GCN #28393).
The source was clearly detected in the 40-200 keV energy range. The light curve showed a single peak of emission peaking at 2020-09-07 18:51:10.019 UT. The measured peak count rate associated with the burst is 160 +/- 24 cts/s above the background in the combined data of four quadrants, with a total of 259 +/- 3 cts. The local mean background count rate was 515+/- 1 cts/s. Using cumulative rates, we measure a T90 of 1.60 +/- 0.01 s.
It was also clearly detected in the CsI anticoincidence (Veto) detector in the 100-500 keV energy range. The light curve showed a single peak of emission peaking at 2020-09-07 18:51:09.00 UT. The measured peak count rate is 513 +/- 44 cts/s above the background in the combined Veto data of four quadrants, with a total of 560 +/- 5 cts. The local mean background count rate was 1494 +/- 2 cts/s. We measure a T90 of 1.48 +/- 0.06 s from the cumulative Veto light curve.
CZTI GRB detections are reported regularly on the payload site at http://astrosat.iucaa.in/czti/?q=grb. CZTI is built by a TIFR-led consortium of institutes across India, including VSSC, ISAC, IUCAA, SAC and PRL. The Indian Space Research Organisation funded, managed and facilitated the project.
GCN Circular #28398
H. A. Krimm (NSF), S. D. Barthelmy (GSFC), A. P. Beardmore (U Leicester), J. R. Cummings (CPI), S. Laha (GSFC/UMBC), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), M. Stamatikos (OSU), T. N. Ukwatta (LANL) (i.e. the Swift-BAT team):
Using the data set from T-240 to T+962 sec from the recent telemetry downlink, we report further analysis of BAT GRB 200907B (trigger #995004) (Beardmore et al., GCN Circ. 28384). The BAT ground-calculated position is RA, Dec = 89.019, 6.905 deg which is
```
   RA(J2000)  =  05h 56m 04.5s
   Dec(J2000) = +06d 54' 17.7"
```
with an uncertainty of 1.8 arcmin, (radius, sys+stat, 90% containment). The partial coding was 78%.
The mask-weighted light curve shows a multi-peaked structure that starts at ~T-0.6 and ends at ~T+0.3 s. The main peak occurs at ~T+0.1 s. T90 (15-350 keV) is 0.83 +- 0.13 sec (estimated error including systematics).
The time-averaged spectrum from T-0.64 to T+0.28 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 0.68 +- 0.25. The fluence in the 15-150 keV band is 1.6 +- 0.2 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T-0.68 sec in the 15-150 keV band is 1.5 +- 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/995004/BA/
GCN Circular #28400
M. H. Siegel (PSU) and A. P. Beardmore (U. Leicester) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 200907B 84 s after the BAT trigger (Beardmore et al., GCN Circ. 28384). No optical afterglow consistent with the XRT position (Evans GCN Circ. 28385) 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            84          233          147         >20.4
u_FC               296          546          246         >19.7
white               84         4892          383         >21.0
v                  625          819           39         >17.7
b                  551         4687          236         >19.4
u                  296         4482          462         >20.4
w1                 675         4277          216         >19.2
m2                 650          670           19         >18.3
w2                 601         5048          186         >19.2
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.61 in the direction of the burst (Schlegel et al. 1998).
photometric redshift z = 0.56 +1.39 -0.32
of host-galaxy: A. E. Nugent et al. 2022, ApJ, 940, 57

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