Gamma-ray Burst 100905A

(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 05 Sep 10 15:08:37 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     433442,   Seg_Num: 0
GRB_RA:           31.530d {+02h 06m 07s} (J2000),
                  31.675d {+02h 06m 42s} (current),
                  30.851d {+02h 03m 24s} (1950)
GRB_DEC:         +14.932d {+14d 55' 54"} (J2000),
                 +14.982d {+14d 58' 57"} (current),
                 +14.694d {+14d 41' 37"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       4327 [cnts]    Image_Peak=216 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   146     E_range: 25-100 keV
BKG_INTEN:       26962 [cnts]
BKG_TIME:        54481.85 SOD {15:08:01.85} UT
BKG_DUR:         8 [sec]
GRB_DATE:        15444 TJD;   248 DOY;   10/09/05
GRB_TIME:        54494.71 SOD {15:08:14.71} UT
GRB_PHI:          12.53 [deg]
GRB_THETA:         8.77 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     14.03 [sigma]
IMAGE_SIGNIF:    8.53 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +2  -1  +0  +0 +62  +0 
SUN_POSTN:       164.28d {+10h 57m 07s}   +6.70d {+06d 41' 53"}
SUN_DIST:        128.27 [deg]   Sun_angle= 8.8 [hr] (West of Sun)
MOON_POSTN:      125.03d {+08h 20m 07s}  +17.37d {+17d 22' 19"}
MOON_DIST:        88.67 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      148.49,-44.20 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       34.50,  2.03 [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 = 141.96,-9.47 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 05 Sep 10 15:09:38 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     433442,   Seg_Num: 0
POINT_RA:         31.524d {+02h 06m 06s} (J2000)
POINT_DEC:       +14.925d {+14d 55' 31"} (J2000)
IMG_START_DATE:  15444 TJD;   248 DOY;   10/09/05
IMG_START_TIME:  54569.93 SOD {15:09:29.93} UT,   75.2 [sec] since BAT Trigger Time
COUNTS:          1    Min_needed= 20
STD_DEV:         0.00   Max_StdDev_for_Good=28.44 [arcsec]
PH2_ITER:        0    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 05 Sep 10 15:11:56 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     433442,   Seg_Num: 0
GRB_RA:           31.530d {+02h 06m 07s} (J2000),
                  31.675d {+02h 06m 42s} (current),
                  30.851d {+02h 03m 24s} (1950)
GRB_DEC:         +14.932d {+14d 55' 54"} (J2000),
                 +14.982d {+14d 58' 57"} (current),
                 +14.694d {+14d 41' 37"} (1950)
GRB_DATE:        15444 TJD;   248 DOY;   10/09/05
GRB_TIME:        54494.71 SOD {15:08:14.71} UT
TRIGGER_INDEX:   146
GRB_PHI:          12.53 [deg]
GRB_THETA:         8.77 [deg]
DELTA_TIME:      -5.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     14.03 [sigma]
IMAGE_SIGNIF:    8.53 [sigma]
LC_URL:          sw00433442000msb.lc
SUN_POSTN:       164.28d {+10h 57m 08s}   +6.70d {+06d 41' 50"}
SUN_DIST:        128.27 [deg]   Sun_angle= 8.8 [hr] (West of Sun)
MOON_POSTN:      125.06d {+08h 20m 15s}  +17.36d {+17d 21' 42"}
MOON_DIST:        88.70 [deg]
MOON_ILLUM:      11 [%]
GAL_COORDS:      148.49,-44.20 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       34.50,  2.03 [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 = 141.96,-9.47 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 05 Sep 10 15:12:32 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     433442,   Seg_Num: 0
POINT_RA:         31.524d {+02h 06m 06s} (J2000)
POINT_DEC:       +14.925d {+14d 55' 30"} (J2000)
POINT_ROLL:      68.556d
IMG_START_DATE:  15444 TJD;   248 DOY;   10/09/05
IMG_START_TIME:  54573.13 SOD {15:09:33.13} UT,   78.4 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.604
N_STARS:         27
X_OFFSET:        512 [pixels]
Y_OFFSET:        512 [pixels]
X_MAX:           1471 [pixels]
Y_MAX:           1471 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw00433442000msufc0078.fits
SUN_POSTN:       164.28d {+10h 57m 08s}   +6.70d {+06d 41' 49"}
SUN_DIST:        128.28 [deg]   Sun_angle= 8.8 [hr] (West of Sun)
MOON_POSTN:      125.07d {+08h 20m 16s}  +17.36d {+17d 21' 35"}
MOON_DIST:        88.71 [deg]
MOON_ILLUM:      11 [%]
GAL_COORDS:      148.49,-44.21 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       34.49,  2.03 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 05 Sep 10 15:13:00 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     433442,   Seg_Num: 0
POINT_RA:         31.524d {+02h 06m 06s} (J2000)
POINT_DEC:       +14.925d {+14d 55' 30"} (J2000)
POINT_ROLL:      68.556d
IMG_START_DATE:  15444 TJD;   248 DOY;   10/09/05
IMG_START_TIME:  54573.13 SOD {15:09:33.13} UT,   78.4 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.604
N_STARS:         27
X_OFFSET:        512 [pixels]
Y_OFFSET:        512 [pixels]
X_MAX:           1471 [pixels]
Y_MAX:           1471 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw00433442000msufc0078.fits
SUN_POSTN:       164.28d {+10h 57m 08s}   +6.70d {+06d 41' 49"}
SUN_DIST:        128.28 [deg]   Sun_angle= 8.8 [hr] (West of Sun)
MOON_POSTN:      125.07d {+08h 20m 18s}  +17.36d {+17d 21' 30"}
MOON_DIST:        88.72 [deg]
MOON_ILLUM:      11 [%]
GAL_COORDS:      148.49,-44.21 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       34.49,  2.03 [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 05 Sep 10 15:12:32 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     433442,   Seg_Num: 0
POINT_RA:         31.524d {+02h 06m 06s} (J2000)
POINT_DEC:       +14.925d {+14d 55' 30"} (J2000)
POINT_ROLL:      68.556d
IMG_START_DATE:  15444 TJD;   248 DOY;   10/09/05
IMG_START_TIME:  54573.13 SOD {15:09:33.13} UT,   78.4 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.604
N_STARS:         27
X_OFFSET:        512 [pixels]
Y_OFFSET:        512 [pixels]
X_MAX:           1471 [pixels]
Y_MAX:           1471 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw00433442000msufc0078.fits
SUN_POSTN:       164.28d {+10h 57m 08s}   +6.70d {+06d 41' 49"}
SUN_DIST:        128.28 [deg]   Sun_angle= 8.8 [hr] (West of Sun)
MOON_POSTN:      125.07d {+08h 20m 16s}  +17.36d {+17d 21' 35"}
MOON_DIST:        88.71 [deg]
MOON_ILLUM:      11 [%]
GAL_COORDS:      148.49,-44.21 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       34.49,  2.03 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 05 Sep 10 15:13:54 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     433442,   Seg_Num: 0
POINT_RA:         31.524d {+02h 06m 06s} (J2000)
POINT_DEC:       +14.925d {+14d 55' 30"} (J2000)
ROLL:            68.556d
IMG_START_DATE:  15444 TJD;   248 DOY;   10/09/05
IMG_START_TIME:  54573.13 SOD {15:09:33.13} UT,   78.4 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     305392179
X_OFFSET:        831 [pixels]
Y_OFFSET:        831 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       991
Y_GRB_POS:       991
BINNING_INDEX:   1
IM_URL:          sw00433442000msuni0085.fits
SUN_POSTN:       164.28d {+10h 57m 08s}   +6.70d {+06d 41' 48"}
SUN_DIST:        128.28 [deg]   Sun_angle= 8.8 [hr] (West of Sun)
MOON_POSTN:      125.08d {+08h 20m 20s}  +17.36d {+17d 21' 20"}
MOON_DIST:        88.73 [deg]
MOON_ILLUM:      11 [%]
GAL_COORDS:      148.49,-44.21 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       34.49,  2.03 [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 05 Sep 10 15:14:13 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     433442,   Seg_Num: 0
GRB_RA:           31.5497d {+02h 06m 11.92s} (J2000),
                  31.6948d {+02h 06m 46.76s} (current),
                  30.8710d {+02h 03m 29.04s} (1950)
GRB_DEC:         +14.9290d {+14d 55' 44.4"} (J2000),
                 +14.9796d {+14d 58' 46.6"} (current),
                 +14.6909d {+14d 41' 27.1"} (1950)
GRB_ERROR:       4.3 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  15444 TJD;   248 DOY;   10/09/05
IMG_START_TIME:  54581.00 SOD {15:09:41.00} UT,   86.3 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       164.28d {+10h 57m 08s}   +6.70d {+06d 41' 48"}
SUN_DIST:        128.25 [deg]   Sun_angle= 8.8 [hr] (West of Sun)
MOON_POSTN:      125.09d {+08h 20m 21s}  +17.35d {+17d 21' 17"}
MOON_DIST:        88.71 [deg]
MOON_ILLUM:      11 [%]
GAL_COORDS:      148.52,-44.20 [deg] galactic lon,lat of the burst
ECL_COORDS:       34.52,  2.02 [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:     Sun 05 Sep 10 15:14:09 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     433442,   Seg_Num: 0
POINT_RA:         31.524d {+02h 06m 06s} (J2000)
POINT_DEC:       +14.925d {+14d 55' 30"} (J2000)
ROLL:            68.556d
IMG_START_DATE:  15444 TJD;   248 DOY;   10/09/05
IMG_START_TIME:  54573.13 SOD {15:09:33.13} UT,   78.4 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     305392179
X_OFFSET:        831 [pixels]
Y_OFFSET:        831 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       991
Y_GRB_POS:       991
BINNING_INDEX:   1
IM_URL:          sw00433442000msuni0085.fits
SUN_POSTN:       164.28d {+10h 57m 08s}   +6.70d {+06d 41' 48"}
SUN_DIST:        128.28 [deg]   Sun_angle= 8.8 [hr] (West of Sun)
MOON_POSTN:      125.08d {+08h 20m 20s}  +17.35d {+17d 21' 17"}
MOON_DIST:        88.73 [deg]
MOON_ILLUM:      11 [%]
GAL_COORDS:      148.49,-44.21 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       34.49,  2.03 [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:        If you have elected to receive attachments:  
COMMENTS:        The uvot_catalog_image.fits.gz file does not exist; skipping the attachment.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 05 Sep 10 15:20:44 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     433442,   Seg_Num: 0
POINT_RA:         31.524d {+02h 06m 06s} (J2000)
POINT_DEC:       +14.927d {+14d 55' 35"} (J2000)
POINT_ROLL:      68.552d
IMG_START_DATE:  15444 TJD;   248 DOY;   10/09/05
IMG_START_TIME:  54785.35 SOD {15:13:05.35} UT,   290.6 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.734
N_STARS:         27
X_OFFSET:        272 [pixels]
Y_OFFSET:        272 [pixels]
X_MAX:           1711 [pixels]
Y_MAX:           1711 [pixels]
DET_THRESH:      8
PHOTO_THRESH:    3
SL_URL:          sw00433442000msufc0290.fits
SUN_POSTN:       164.29d {+10h 57m 09s}   +6.69d {+06d 41' 42"}
SUN_DIST:        128.28 [deg]   Sun_angle= 8.8 [hr] (West of Sun)
MOON_POSTN:      125.15d {+08h 20m 37s}  +17.33d {+17d 20' 03"}
MOON_DIST:        88.80 [deg]
MOON_ILLUM:      11 [%]
GAL_COORDS:      148.49,-44.21 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       34.50,  2.03 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 05 Sep 10 15:20:44 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     433442,   Seg_Num: 0
POINT_RA:         31.524d {+02h 06m 06s} (J2000)
POINT_DEC:       +14.927d {+14d 55' 35"} (J2000)
POINT_ROLL:      68.552d
IMG_START_DATE:  15444 TJD;   248 DOY;   10/09/05
IMG_START_TIME:  54785.35 SOD {15:13:05.35} UT,   290.6 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.734
N_STARS:         27
X_OFFSET:        272 [pixels]
Y_OFFSET:        272 [pixels]
X_MAX:           1711 [pixels]
Y_MAX:           1711 [pixels]
DET_THRESH:      8
PHOTO_THRESH:    3
SL_URL:          sw00433442000msufc0290.fits
SUN_POSTN:       164.29d {+10h 57m 09s}   +6.69d {+06d 41' 42"}
SUN_DIST:        128.28 [deg]   Sun_angle= 8.8 [hr] (West of Sun)
MOON_POSTN:      125.15d {+08h 20m 37s}  +17.33d {+17d 20' 03"}
MOON_DIST:        88.80 [deg]
MOON_ILLUM:      11 [%]
GAL_COORDS:      148.49,-44.21 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       34.50,  2.03 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 05 Sep 10 15:21:04 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     433442,   Seg_Num: 0
POINT_RA:         31.524d {+02h 06m 06s} (J2000)
POINT_DEC:       +14.927d {+14d 55' 35"} (J2000)
POINT_ROLL:      68.552d
IMG_START_DATE:  15444 TJD;   248 DOY;   10/09/05
IMG_START_TIME:  54785.35 SOD {15:13:05.35} UT,   290.6 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.734
N_STARS:         27
X_OFFSET:        272 [pixels]
Y_OFFSET:        272 [pixels]
X_MAX:           1711 [pixels]
Y_MAX:           1711 [pixels]
DET_THRESH:      8
PHOTO_THRESH:    3
SL_URL:          sw00433442000msufc0290.fits
SUN_POSTN:       164.29d {+10h 57m 09s}   +6.69d {+06d 41' 42"}
SUN_DIST:        128.28 [deg]   Sun_angle= 8.8 [hr] (West of Sun)
MOON_POSTN:      125.16d {+08h 20m 37s}  +17.33d {+17d 19' 60"}
MOON_DIST:        88.80 [deg]
MOON_ILLUM:      11 [%]
GAL_COORDS:      148.49,-44.21 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       34.50,  2.03 [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 05 Sep 10 15:22:05 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     433442,   Seg_Num: 0
POINT_RA:         31.524d {+02h 06m 06s} (J2000)
POINT_DEC:       +14.927d {+14d 55' 35"} (J2000)
ROLL:            68.552d
IMG_START_DATE:  15444 TJD;   248 DOY;   10/09/05
IMG_START_TIME:  54785.35 SOD {15:13:05.35} UT,   290.6 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     305392391
X_OFFSET:        831 [pixels]
Y_OFFSET:        831 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       991
Y_GRB_POS:       991
BINNING_INDEX:   1
IM_URL:          sw00433442000msuni0297.fits
SUN_POSTN:       164.29d {+10h 57m 09s}   +6.69d {+06d 41' 41"}
SUN_DIST:        128.28 [deg]   Sun_angle= 8.8 [hr] (West of Sun)
MOON_POSTN:      125.17d {+08h 20m 40s}  +17.33d {+17d 19' 48"}
MOON_DIST:        88.81 [deg]
MOON_ILLUM:      11 [%]
GAL_COORDS:      148.49,-44.21 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       34.50,  2.03 [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 05 Sep 10 15:21:23 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     433442,   Seg_Num: 0
GRB_RA:           31.5503d {+02h 06m 12.07s} (J2000),
                  31.6954d {+02h 06m 46.90s} (current),
                  30.8716d {+02h 03m 29.19s} (1950)
GRB_DEC:         +14.9301d {+14d 55' 48.3"} (J2000),
                 +14.9807d {+14d 58' 50.5"} (current),
                 +14.6920d {+14d 41' 31.1"} (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:  15444 TJD;   248 DOY;   10/09/05
IMG_START_TIME:  54581.00 SOD {15:09:41.00} UT,   86.3 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       164.29d {+10h 57m 09s}   +6.69d {+06d 41' 41"}
SUN_DIST:        128.26 [deg]   Sun_angle= 8.8 [hr] (West of Sun)
MOON_POSTN:      125.16d {+08h 20m 38s}  +17.33d {+17d 19' 56"}
MOON_DIST:        88.78 [deg]
MOON_ILLUM:      11 [%]
GAL_COORDS:      148.52,-44.20 [deg] galactic lon,lat of the burst
ECL_COORDS:       34.52,  2.02 [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 05 Sep 10 15:22:22 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     433442,   Seg_Num: 0
POINT_RA:         31.524d {+02h 06m 06s} (J2000)
POINT_DEC:       +14.927d {+14d 55' 35"} (J2000)
ROLL:            68.552d
IMG_START_DATE:  15444 TJD;   248 DOY;   10/09/05
IMG_START_TIME:  54785.35 SOD {15:13:05.35} UT,   290.6 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     305392391
X_OFFSET:        831 [pixels]
Y_OFFSET:        831 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       991
Y_GRB_POS:       991
BINNING_INDEX:   1
IM_URL:          sw00433442000msuni0297.fits
SUN_POSTN:       164.29d {+10h 57m 09s}   +6.69d {+06d 41' 40"}
SUN_DIST:        128.28 [deg]   Sun_angle= 8.8 [hr] (West of Sun)
MOON_POSTN:      125.17d {+08h 20m 41s}  +17.33d {+17d 19' 45"}
MOON_DIST:        88.81 [deg]
MOON_ILLUM:      11 [%]
GAL_COORDS:      148.49,-44.21 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       34.50,  2.03 [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:        If you have elected to receive attachments:  
COMMENTS:        The uvot_catalog_image.fits.gz file does not exist; skipping the attachment.

GCN Circular #11214
F. E. Marshall (NASA/GSFC), S. D. Barthelmy (GSFC), A. P. Beardmore (U Leicester), D. N. Burrows (PSU), P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), J. M. Gelbord (PSU), C. Guidorzi (U Ferrara), S. T. Holland (CRESST/USRA/GSFC), P. T. O'Brien (U Leicester), K. L. Page (U Leicester), D. M. Palmer (LANL), A. Rowlinson (U Leicester), B. Sbarufatti (INAF-OAB/IASFPA), M. H. Siegel (PSU), E. Troja (NASA/GSFC/ORAU) and T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:
At 15:08:14 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 100905A (trigger=433442). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 31.530, +14.932 which is
```
   RA(J2000) = 02h 06m 07s
   Dec(J2000) = +14d 55' 54"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a single peak structure with a duration of about 6 sec. The peak count rate was ~1500 counts/sec (15-350 keV), at ~1 sec after the trigger.
The XRT began observing the field at 15:09:29.9 UT, 75.2 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source with an enhanced position: RA, Dec 31.5505, 14.9300 which is equivalent to:
```
   RA(J2000)  = 02h 06m 12.12s
   Dec(J2000) = +14d 55' 47.9"
```
with an uncertainty of 2.3 arcseconds (radius, 90% containment). This location is 71 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 5.35 x 10^20 cm^-2 (Kalberla et al. 2005).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 77 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 upper limit is typically 19.3 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 0.06.
Burst Advocate for this burst is F. E. Marshall (marshall AT milkyway.gsfc.nasa.gov). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/too.html.)

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 05 Sep 10 15:28:23 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     433442,   Seg_Num: 0
POINT_RA:         31.524d {+02h 06m 06s} (J2000)
POINT_DEC:       +14.927d {+14d 55' 36"} (J2000)
POINT_ROLL:      68.553d
IMG_START_DATE:  15444 TJD;   248 DOY;   10/09/05
IMG_START_TIME:  55361.40 SOD {15:22:41.40} UT,   866.7 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.556
N_STARS:         63
X_OFFSET:        272 [pixels]
Y_OFFSET:        272 [pixels]
X_MAX:           1711 [pixels]
Y_MAX:           1711 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw00433442000msufc0866.fits
SUN_POSTN:       164.29d {+10h 57m 10s}   +6.69d {+06d 41' 35"}
SUN_DIST:        128.29 [deg]   Sun_angle= 8.8 [hr] (West of Sun)
MOON_POSTN:      125.23d {+08h 20m 55s}  +17.31d {+17d 18' 38"}
MOON_DIST:        88.88 [deg]
MOON_ILLUM:      11 [%]
GAL_COORDS:      148.49,-44.21 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       34.50,  2.03 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 05 Sep 10 15:28:23 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     433442,   Seg_Num: 0
POINT_RA:         31.524d {+02h 06m 06s} (J2000)
POINT_DEC:       +14.927d {+14d 55' 36"} (J2000)
POINT_ROLL:      68.553d
IMG_START_DATE:  15444 TJD;   248 DOY;   10/09/05
IMG_START_TIME:  55361.40 SOD {15:22:41.40} UT,   866.7 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.556
N_STARS:         63
X_OFFSET:        272 [pixels]
Y_OFFSET:        272 [pixels]
X_MAX:           1711 [pixels]
Y_MAX:           1711 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw00433442000msufc0866.fits
SUN_POSTN:       164.29d {+10h 57m 10s}   +6.69d {+06d 41' 35"}
SUN_DIST:        128.29 [deg]   Sun_angle= 8.8 [hr] (West of Sun)
MOON_POSTN:      125.23d {+08h 20m 55s}  +17.31d {+17d 18' 38"}
MOON_DIST:        88.88 [deg]
MOON_ILLUM:      11 [%]
GAL_COORDS:      148.49,-44.21 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       34.50,  2.03 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 05 Sep 10 15:28:47 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     433442,   Seg_Num: 0
POINT_RA:         31.524d {+02h 06m 06s} (J2000)
POINT_DEC:       +14.927d {+14d 55' 36"} (J2000)
POINT_ROLL:      68.553d
IMG_START_DATE:  15444 TJD;   248 DOY;   10/09/05
IMG_START_TIME:  55361.40 SOD {15:22:41.40} UT,   866.7 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.556
N_STARS:         63
X_OFFSET:        272 [pixels]
Y_OFFSET:        272 [pixels]
X_MAX:           1711 [pixels]
Y_MAX:           1711 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw00433442000msufc0866.fits
SUN_POSTN:       164.29d {+10h 57m 10s}   +6.69d {+06d 41' 34"}
SUN_DIST:        128.29 [deg]   Sun_angle= 8.8 [hr] (West of Sun)
MOON_POSTN:      125.23d {+08h 20m 56s}  +17.31d {+17d 18' 33"}
MOON_DIST:        88.88 [deg]
MOON_ILLUM:      11 [%]
GAL_COORDS:      148.49,-44.21 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       34.50,  2.03 [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 05 Sep 10 15:29:54 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     433442,   Seg_Num: 0
POINT_RA:         31.524d {+02h 06m 06s} (J2000)
POINT_DEC:       +14.927d {+14d 55' 36"} (J2000)
ROLL:            68.553d
IMG_START_DATE:  15444 TJD;   248 DOY;   10/09/05
IMG_START_TIME:  55361.40 SOD {15:22:41.40} UT,   866.7 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     305392967
X_OFFSET:        831 [pixels]
Y_OFFSET:        831 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       991
Y_GRB_POS:       991
BINNING_INDEX:   1
IM_URL:          sw00433442000msuni0873.fits
SUN_POSTN:       164.29d {+10h 57m 11s}   +6.69d {+06d 41' 33"}
SUN_DIST:        128.29 [deg]   Sun_angle= 8.8 [hr] (West of Sun)
MOON_POSTN:      125.25d {+08h 20m 59s}  +17.31d {+17d 18' 21"}
MOON_DIST:        88.89 [deg]
MOON_ILLUM:      11 [%]
GAL_COORDS:      148.49,-44.21 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       34.50,  2.03 [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 05 Sep 10 15:30:07 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     433442,   Seg_Num: 0
POINT_RA:         31.524d {+02h 06m 06s} (J2000)
POINT_DEC:       +14.927d {+14d 55' 36"} (J2000)
ROLL:            68.553d
IMG_START_DATE:  15444 TJD;   248 DOY;   10/09/05
IMG_START_TIME:  55361.40 SOD {15:22:41.40} UT,   866.7 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     305392967
X_OFFSET:        831 [pixels]
Y_OFFSET:        831 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       991
Y_GRB_POS:       991
BINNING_INDEX:   1
IM_URL:          sw00433442000msuni0873.fits
SUN_POSTN:       164.29d {+10h 57m 11s}   +6.69d {+06d 41' 33"}
SUN_DIST:        128.29 [deg]   Sun_angle= 8.8 [hr] (West of Sun)
MOON_POSTN:      125.25d {+08h 21m 00s}  +17.31d {+17d 18' 18"}
MOON_DIST:        88.89 [deg]
MOON_ILLUM:      11 [%]
GAL_COORDS:      148.49,-44.21 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       34.50,  2.03 [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:        If you have elected to receive attachments:  
COMMENTS:        The uvot_catalog_image.fits.gz file does not exist; skipping the attachment.

GCN Circular #11215
C. Guidorzi (U. Ferrara), I. A. Steele, C. G. Mundell (LJMU), A. Gomboc (U. Ljubljana) report on behalf of a large collaboration:
The Faulkes Telescope North automatically began observing Swift GRB 100905A (Marshall et al. GCN Circ. 11214) on September 05, 15:10:32 UT, 138 s from the GRB trigger time.
Within the XRT error circle we do not find any source down to the following limiting magnitudes:
```
Mid Time from       Exposure      Filter      Lim. Mag.
GRB (s)               (s)
-------------------------------------------------------
179                  3x10          R > 19.8
604                   120          R > 20.0
839                   100          i' > 19.0
-------------------------------------------------------
```
Magnitudes are calibrated against nearby USNOB-1 stars R2 and I values. Observations stopped soon due to twilight.
GCN Circular #11216
K.Ivanov, O.Chuvalaev, V.Poleschuk, E.Konstantinov, V.Lenok, O.Gres, S.Yazev, N.M.Budnev, Irkutsk State University
E. Gorbovskoy, V. Lipunov, V.Kornilov, A.Belinski, N.Shatskiy, N.Tyurina, D.Kuvshinov, P.Balanutsa, V.V.Chazov, P.V.Kortunov, A.Kuznetsov, D.Zimnukhov, M. Kornilov Sternberg Astronomical Institute, Moscow State University
V.Krushinski, I.Zalozhnich, T.Kopytova, A. Popov Ural State University, Kourovka
A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik Kislovodsk Solar Station of the Pulkovo Observatory
V.Yurkov, Yu.Sergienko, D.Varda, I.Kudelina Blagoveschensk Educational State University, Blagoveschensk
MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located at Tunka was pointed to the Swift GRB 100905A (Marshall et al. GCN Circ. 11214) 33 sec after Notice time (55 s after GRB trigger time) in two polarizations bands.
There is no optical transient at XRT position (Marshall et al. GCN Circ. 11214). Following data has been received:
```
start UT       end UT      t_exp(s)   mlim   t_start-tGRB(s)  Coadd? Band
--------------------------------------------------------------------------
15:09:10       15:09:20     10        16.5       55.0          N  Polariz
15:09:39       19:09:59     20        17.1       84.0          N  Polariz
15:10:45       15:11:15     30        17.3      150.0          N  Polariz
15:11:35       15:12:15     40        17.5      200.0          N  Polariz
--------------------------------------------------------------------------
```
The observations and data reductions is continued.
The message may be cited.
GCN Circular #11218
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/UMD), F. E. Marshall (NASA/GSFC), D. M. Palmer (LANL), T. Sakamoto (GSFC/UMBC), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (GWU) (i.e. the Swift-BAT team):
Using the data set from T-61 to T+242 sec from the recent telemetry downlink, we report further analysis of BAT GRB 100905A (trigger #433442) (Marshall, et al., GCN Circ. 11214). The BAT ground-calculated position is RA, Dec = 31.542, 14.919 deg, which is
```
   RA(J2000)  =  02h 06m 10.0s 
   Dec(J2000) = +14d 55' 08.2" 
```
with an uncertainty of 1.7 arcmin, (radius, sys+stat, 90% containment). The partial coding was 100%.
The mask-weighted light curve shows a single peak starting at ~T-1.7 sec, peaking at ~T+0.5 sec, and ending at ~T+3 sec. T90 (15-350 keV) is 3.4 +- 0.5 sec (estimated error including systematics).
The time-averaged spectrum from T-1.6 to T+2.1 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.09 +- 0.19. The fluence in the 15-150 keV band is 1.7 +- 0.2 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T+0.03 sec in the 15-150 keV band is 0.6 +- 0.1 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/433442/BA/
GCN Circular #11219
P.A. Evans, M.R. Goad, J.P. Osborne and A.P. Beardmore (U. Leicester) report on behalf of the Swift-XRT team.
Using 1956 s of XRT Photon Counting mode data and 2 UVOT images for GRB 100905A, 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 = 31.55023, +14.92941 which is equivalent to:
```
RA (J2000): 02h 06m 12.06s
Dec (J2000): +14d 55' 45.9"
```
with an uncertainty of 1.6 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 #11220
A. Sota (IAA-CSIC), A. de Ugarte Postigo (DARK/NBI), A.J. Castro-Tirado (IAA-CSIC) report on behalf of a larger collaboration:
"We have observed the field of GRB100905A (Marshall et al. GCNC 11214) using the 1.5m telescope of the Observatorio de Sierra Nevada, in Granada (Spain). In a 7x300s combined I-band frame, with mean epoch September 5.9792 UT (8.36 hours after the burst onset), we do not detect any new source within the enhanced XRT position (Evans et al. GCNC 11219) down to a 3-sigma limiting magnitude of 22.8. USNO-B1.0 has been used as reference catalogue."
GCN Circular #11222
Myungshin Im, Changsu Choi, Hyunsung Jun, Eugene Kang (CEOU/Seoul National University), Y. Urata (NCU), P. Choi (Pomona College), T. Sakamoto (NASA/GSFC), and N. Gehrels (NASA/GSFC) on behalf of a larger collaboration
We observed GRB 100905A (Marshall et al. GCN 11214) in z, J, H, and K filters using UKIRT. The observation started at Sept. 05, 15:22 UT or roughly 17 minutes after the BAT alert, until the sunrise. The reduced images with non-optimal calibration frames show a "possible" very faint source within the XRT error circle (Evans et al. GCN 11219) whose significance is only 2-3 sigma in each image (2-sigma limit, J=19.8, H=19.0, and K=18.7 mag). The faint smudge show up in all zJHK filter images, suggesting this could be an afterglow, but we do not exclude the possibility that this is just a spurious detection. Further analysis of the UKIRT data is ongoing.
GCN Circular #11223
P.A. Evans (U. Leicester) and F. E. Marshall (NASA/GSFC) report on behalf of the Swift-XRT team:
We have analysed 7.1 ks of XRT data for GRB 100905A (Marshall et al. GCN Circ. 11214), from 78 s to 13.6 ks after the BAT trigger. The data comprise 71 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 11219).
The light curve shows some initial flaring activity, with the flares peaking at around 290, 320 and 400 s after the trigger. The flares peak an order of magnitude brighter than the underlying emission, which can be modelled with a single power-law, with a decay index of alpha=0.86 (+/-0.06).
A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 3.0 (+/-0.3). The best-fitting absorption column is 1.9 (+0.6, -0.5) x 10^21 cm^-2, in excess of the Galactic value of 5.4 x 10^20 cm^-2 (Kalberla et al. 2005). The PC mode spectrum has a photon index of 1.97 (+0.12, -0.18) and a best-fitting absorption column of 8.4 (+4.1, -2.8) x 10^20 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.9 x 10^-11 (4.8 x 10^-11) erg cm^-2 count^-1.
If the light curve continues to decay with a power-law decay index of 0.86, the count rate at T+24 hours will be 2.7 x 10^-3 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 1.1 x 10^-13 (1.3 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/00433442.
This circular is an official product of the Swift-XRT team.
GCN Circular #11224
D. Kuroda, K. Yanagisawa, Y. Shimizu, H. Toda (OAO, NAOJ), S. Nagayama (NAOJ), M. Yoshida (Hiroshima), K. Ohta (Kyoto) and N. Kawai(Tokyo Tech) report on behalf of the MITSuME collaboration:
We observed the field of GRB 100905A (Marshall et al., GCN 11214) with the optical three color (g', Rc and Ic) CCD camera attached to the MITSuME 50cm telescope of Okayama Astrophysical Observatory.
The observation started on 2010-09-05 15:31:18 UT (~23 min after the burst). We did not find any new point source within the enhanced XRT error circle (Evans et al., GCNC 11219) in all the three bands.
Three sigma upper limits of the OT are listed below. We used SDSS catalog for flux calibration.
```
T0+[day]   MID-UT   T-EXP[sec]    g'     Rc     Ic
------------------------------------------------------
0.09641    17:27:05 10380.0     >20.9  >20.6  >19.7
------------------------------------------------------
T0+ : Elapsed time after the burst [day]
T-EXP: Total Exposure time [sec]
```
GCN Circular #11225
D. Kuroda (OAO, NAOJ), H. Hanayama, T. Miyaji, J. Watanabe (IAO, NAOJ), K. Yanagisawa (OAO, NAOJ), M. Yoshida (Hiroshima), K. Ohta (Kyoto) and N. Kawai(Tokyo Tech) report on behalf of the MITSuME collaboration:
We observed the field of GRB 100905A (Marshall et al., GCN 11214) with the optical three color (g', Rc and Ic) CCD camera attached to the Murikabushi 1m telescope of Ishigakijima Astronomical Observatory.
The observation started on 2010-09-05 18:56:36 UT (~0.16 day after the burst). We did not find any new point source within the enhanced XRT error circle (Evans et al., GCNC 11219) in all the three bands.
Three sigma upper limits of the OT are listed below. We used SDSS catalog for flux calibration.
```
T0+[day]   MID-UT   T-EXP[sec]    g'     Rc     Ic
------------------------------------------------------
0.16300    19:02:58  1440.0      >21.1  >21.4  >19.5
------------------------------------------------------
T0+ : Elapsed time after the burst [day]
T-EXP: Total Exposure time [sec]
```
GCN Circular #11237
M. H. Siegel (PSU) and F. E. Marshall (NASA/GSFC) report on behalf of the Swift/UVOT team.
The Swift/UVOT began settled observations of the field of GRB 100905A 77s after the BAT trigger (Marshall et al., GCN Circ. 11214). Data summed from the first and second orbits do not reveal a source at the enhanced position of the X-ray afterglow (Evans et al., GCN Circ. 11219).
The 3-sigma upper limits for the finding chart (fc) and summed exposures are reported below:
```
FILTER     T_start(s)  T_stop    Exposure     Mag/3UL
========================================================
white fc      78        228        147        >20.77
white         78       2055        450        >21.29
V            619       1933        155        >19.01
B            545       2031        155        >19.81
u fc         290        540        245        >20.08
u            290       2006        381        >20.17
uvw1         668       1982        155        >19.53
uvm2        5654       7290        393        >20.19
uvw2        5245      12865       1278        >21.26
=======================================================
```
The above magnitudes are not corrected for the Galactic extinction corresponding to a reddening of E_{B-V} = 0.06 (Schlegel et al., 1998, ApJS, 500, 525). The photometry is on the UVOT photometric system described in Poole et al. (2008, MNRAS, 383, 627).
GCN Report 299.1
GCN_Report 299.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_299_1.pdf by F.E. Marshall at NASA/GSFC titled: "Final report on Swift Observations of GRB 100905A"
Photometric redshift estimate of 7.88+0.75-0.95 arXiv:1709.06867, (Bolmer et al. 2017, A&A)

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Jochen Greiner, last update: 07-Nov-2017 [Disclaimer]