Gamma-ray Burst 101011A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

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Results of Observations

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Mon 11 Oct 10 16:58:42 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      47
TRIGGER_NUM:     308509118
GRB_RA:           17.650d {+01h 10m 36s} (J2000),
                  17.701d {+01h 10m 48s} (current),
                  17.415d {+01h 09m 40s} (1950)
GRB_DEC:         -78.183d {-78d 10' 59"} (J2000),
                 -78.126d {-78d 07' 33"} (current),
                 -78.449d {-78d 26' 55"} (1950)
GRB_ERROR:       9.70 [deg radius, statistical plus systematic]
GRB_INTEN:       237 [cnts/sec]
DATA_SIGNIF:     6.30 [sigma]
INTEG_TIME:      2.048 [sec]
GRB_DATE:        15480 TJD;   284 DOY;   10/10/11
GRB_TIME:        61116.53 SOD {16:58:36.53} UT
GRB_PHI:         204.00 [deg]
GRB_THETA:       155.00 [deg]
DATA_TIME_SCALE: 2.0480 [sec]
HARD_RATIO:      0.42
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      95%  GRB
2nd_MOST_LIKELY:   4%  Generic Transient
DETECTORS:       0,0,0, 0,0,0, 1,0,1, 0,0,0, 0,0,
SUN_POSTN:       196.85d {+13h 07m 24s}   -7.16d {-07d 09' 42"}
SUN_DIST:         94.71 [deg]   Sun_angle= 11.9 [hr] (West of Sun)
MOON_POSTN:      248.75d {+16h 35m 01s}  -24.23d {-24d 13' 40"}
MOON_DIST:        73.52 [deg]
MOON_ILLUM:      19 [%]
GAL_COORDS:      301.67,-38.90 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      300.42,-67.33 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 148.63,25.42 [deg].

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Mon 11 Oct 10 16:59:04 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      56
TRIGGER_NUM:     308509118
GRB_RA:           17.430d {+01h 09m 43s} (J2000),
                  17.519d {+01h 10m 05s} (current),
                  17.014d {+01h 08m 03s} (1950)
GRB_DEC:         -69.690d {-69d 41' 23"} (J2000),
                 -69.633d {-69d 37' 57"} (current),
                 -69.956d {-69d 57' 20"} (1950)
GRB_ERROR:       9.10 [deg radius, statistical only]
DATA_SIGNIF:     7.70 [sigma]
DATA_INTERVAL:   2.048 [sec]
GRB_DATE:        15480 TJD;   284 DOY;   10/10/11
GRB_TIME:        61116.53 SOD {16:58:36.53} UT
GRB_PHI:         198.00 [deg]
GRB_THETA:       147.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   413 (Gnd S/W Version number)
SUN_POSTN:       196.85d {+13h 07m 24s}   -7.16d {-07d 09' 42"}
SUN_DIST:        103.20 [deg]   Sun_angle= 12.0 [hr] (West of Sun)
MOON_POSTN:      248.76d {+16h 35m 02s}  -24.23d {-24d 13' 41"}
MOON_DIST:        79.28 [deg]
MOON_ILLUM:      19 [%]
GAL_COORDS:      300.59,-47.36 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      320.02,-64.40 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 11 Oct 10 16:58:58 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     436094,   Seg_Num: 0
GRB_RA:           48.298d {+03h 13m 12s} (J2000),
                  48.336d {+03h 13m 21s} (current),
                  48.126d {+03h 12m 30s} (1950)
GRB_DEC:         -65.986d {-65d 59' 08"} (J2000),
                 -65.946d {-65d 56' 45"} (current),
                 -66.171d {-66d 10' 16"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       4728 [cnts]    Image_Peak=176 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   155     E_range: 50-350 keV
BKG_INTEN:       25259 [cnts]
BKG_TIME:        61097.73 SOD {16:58:17.73} UT
BKG_DUR:         8 [sec]
GRB_DATE:        15480 TJD;   284 DOY;   10/10/11
GRB_TIME:        61115.33 SOD {16:58:35.33} UT
GRB_PHI:           2.62 [deg]
GRB_THETA:        25.11 [deg]
SOLN_STATUS:     0x83
RATE_SIGNIF:     24.79 [sigma]
IMAGE_SIGNIF:    6.65 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +3  -4  +0  +0 +23  +0 
SUN_POSTN:       196.85d {+13h 07m 24s}   -7.16d {-07d 09' 42"}
SUN_DIST:        103.36 [deg]   Sun_angle= 9.9 [hr] (West of Sun)
MOON_POSTN:      248.76d {+16h 35m 02s}  -24.23d {-24d 13' 41"}
MOON_DIST:        88.49 [deg]
MOON_ILLUM:      19 [%]
GAL_COORDS:      283.31,-45.37 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      342.65,-73.52 [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:        Since the IMAGE_SIGNIF is less than 7 sigma, this is a questionable detection.  
COMMENTS:        This trigger occurred at longitude,latitude = 121.90,-20.50 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 11 Oct 10 17:00:21 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     436094,   Seg_Num: 0
GRB_RA:           48.2943d {+03h 13m 10.63s} (J2000),
                  48.3319d {+03h 13m 19.66s} (current),
                  48.1216d {+03h 12m 29.18s} (1950)
GRB_DEC:         -65.9805d {-65d 58' 49.8"} (J2000),
                 -65.9406d {-65d 56' 26.1"} (current),
                 -66.1660d {-66d 09' 57.7"} (1950)
GRB_ERROR:       6.1 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       6.35e-10 [erg/cm2/sec]
GRB_SIGNIF:      4.69 [sigma]
IMG_START_DATE:  15480 TJD;   284 DOY;   10/10/11
IMG_START_TIME:  61193.50 SOD {16:59:53.50} UT,   78.2 [sec] since BAT Trigger Time
TAM[0-3]:        327.68 237.25 261.61 243.73
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       196.85d {+13h 07m 24s}   -7.16d {-07d 09' 43"}
SUN_DIST:        103.36 [deg]   Sun_angle= 9.9 [hr] (West of Sun)
MOON_POSTN:      248.77d {+16h 35m 05s}  -24.23d {-24d 13' 44"}
MOON_DIST:        88.49 [deg]
MOON_ILLUM:      19 [%]
GAL_COORDS:      283.30,-45.37 [deg] galactic lon,lat of the burst
ECL_COORDS:      342.67,-73.52 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 0.34 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 11 Oct 10 17:00:32 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     436094,   Seg_Num: 0
GRB_RA:           48.2943d {+03h 13m 10.6s} (J2000),
                  48.3319d {+03h 13m 19.6s} (current),
                  48.1216d {+03h 12m 29.1s} (1950)
GRB_DEC:         -65.9805d {-65d 58' 49.8"} (J2000),
                 -65.9406d {-65d 56' 26.1"} (current),
                 -66.1660d {-66d 09' 57.7"} (1950)
GRB_ERROR:       5.8 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       22 [cnts]
IMG_START_DATE:  15480 TJD;   284 DOY;   10/10/11
IMG_START_TIME:  61193.50 SOD {16:59:53.50} UT,   78.2 [sec] since BAT Trigger Time
CENTROID_X:      319.46,  raw= 319  [pixels]
CENTROID_Y:      303.50,  raw= 304  [pixels]
ROLL:            147.87 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   12.97
GRB_POS_XRT_Z:   40.45
IMAGE_URL:       sw00436094000msxps_rw.img
SUN_POSTN:       196.85d {+13h 07m 24s}   -7.16d {-07d 09' 44"}
SUN_DIST:        103.36 [deg]   Sun_angle= 9.9 [hr] (West of Sun)
MOON_POSTN:      248.77d {+16h 35m 05s}  -24.23d {-24d 13' 44"}
MOON_DIST:        88.49 [deg]
MOON_ILLUM:      19 [%]
GAL_COORDS:      283.30,-45.37 [deg] galactic lon,lat of the burst
ECL_COORDS:      342.67,-73.52 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 11 Oct 10 17:00:39 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     436094,   Seg_Num: 0
GRB_RA:           48.2943d {+03h 13m 10.6s} (J2000),
                  48.3319d {+03h 13m 19.6s} (current),
                  48.1216d {+03h 12m 29.1s} (1950)
GRB_DEC:         -65.9805d {-65d 58' 49.8"} (J2000),
                 -65.9406d {-65d 56' 26.1"} (current),
                 -66.1660d {-66d 09' 57.7"} (1950)
GRB_ERROR:       5.8 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       22 [cnts]
IMG_START_DATE:  15480 TJD;   284 DOY;   10/10/11
IMG_START_TIME:  61193.50 SOD {16:59:53.50} UT,   78.2 [sec] since BAT Trigger Time
CENTROID_X:      319.46,  raw= 319  [pixels]
CENTROID_Y:      303.50,  raw= 304  [pixels]
ROLL:            147.87 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   12.97
GRB_POS_XRT_Z:   40.45
IMAGE_URL:       sw00436094000msxps_rw.img
SUN_POSTN:       196.85d {+13h 07m 24s}   -7.16d {-07d 09' 44"}
SUN_DIST:        103.36 [deg]   Sun_angle= 9.9 [hr] (West of Sun)
MOON_POSTN:      248.77d {+16h 35m 06s}  -24.23d {-24d 13' 44"}
MOON_DIST:        88.49 [deg]
MOON_ILLUM:      19 [%]
GAL_COORDS:      283.30,-45.37 [deg] galactic lon,lat of the burst
ECL_COORDS:      342.67,-73.52 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 11 Oct 10 17:02:19 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     436094,   Seg_Num: 0
GRB_RA:           48.298d {+03h 13m 12s} (J2000),
                  48.336d {+03h 13m 21s} (current),
                  48.126d {+03h 12m 30s} (1950)
GRB_DEC:         -65.986d {-65d 59' 08"} (J2000),
                 -65.946d {-65d 56' 45"} (current),
                 -66.171d {-66d 10' 16"} (1950)
GRB_DATE:        15480 TJD;   284 DOY;   10/10/11
GRB_TIME:        61115.33 SOD {16:58:35.33} UT
TRIGGER_INDEX:   155
GRB_PHI:           2.62 [deg]
GRB_THETA:        25.11 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x83
RATE_SIGNIF:     24.79 [sigma]
IMAGE_SIGNIF:    6.65 [sigma]
LC_URL:          sw00436094000msb.lc
SUN_POSTN:       196.85d {+13h 07m 25s}   -7.16d {-07d 09' 45"}
SUN_DIST:        103.36 [deg]   Sun_angle= 9.9 [hr] (West of Sun)
MOON_POSTN:      248.79d {+16h 35m 10s}  -24.23d {-24d 13' 48"}
MOON_DIST:        88.48 [deg]
MOON_ILLUM:      19 [%]
GAL_COORDS:      283.31,-45.37 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      342.65,-73.52 [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:        Since the IMAGE_SIGNIF is less than 7 sigma, this is a questionable detection.  
COMMENTS:        This trigger occurred at longitude,latitude = 121.90,-20.50 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 11 Oct 10 17:03:03 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     436094,   Seg_Num: 0
POINT_RA:         48.302d {+03h 13m 13s} (J2000)
POINT_DEC:       -65.992d {-65d 59' 30"} (J2000)
POINT_ROLL:      147.865d
IMG_START_DATE:  15480 TJD;   284 DOY;   10/10/11
IMG_START_TIME:  61200.08 SOD {17:00:00.08} UT,   84.8 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.540
N_STARS:         62
X_OFFSET:        440 [pixels]
Y_OFFSET:        584 [pixels]
X_MAX:           1399 [pixels]
Y_MAX:           1543 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00436094000msufc0084.fits
SUN_POSTN:       196.85d {+13h 07m 25s}   -7.16d {-07d 09' 46"}
SUN_DIST:        103.35 [deg]   Sun_angle= 9.9 [hr] (West of Sun)
MOON_POSTN:      248.80d {+16h 35m 12s}  -24.23d {-24d 13' 50"}
MOON_DIST:        88.47 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      283.31,-45.36 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      342.63,-73.53 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 11 Oct 10 17:03:23 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     436094,   Seg_Num: 0
POINT_RA:         48.302d {+03h 13m 13s} (J2000)
POINT_DEC:       -65.992d {-65d 59' 30"} (J2000)
POINT_ROLL:      147.865d
IMG_START_DATE:  15480 TJD;   284 DOY;   10/10/11
IMG_START_TIME:  61200.08 SOD {17:00:00.08} UT,   84.8 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.540
N_STARS:         62
X_OFFSET:        440 [pixels]
Y_OFFSET:        584 [pixels]
X_MAX:           1399 [pixels]
Y_MAX:           1543 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00436094000msufc0084.fits
SUN_POSTN:       196.85d {+13h 07m 25s}   -7.16d {-07d 09' 46"}
SUN_DIST:        103.35 [deg]   Sun_angle= 9.9 [hr] (West of Sun)
MOON_POSTN:      248.80d {+16h 35m 12s}  -24.23d {-24d 13' 51"}
MOON_DIST:        88.47 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      283.31,-45.36 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      342.63,-73.53 [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 11 Oct 10 17:04:23 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     436094,   Seg_Num: 0
POINT_RA:         48.302d {+03h 13m 13s} (J2000)
POINT_DEC:       -65.992d {-65d 59' 30"} (J2000)
ROLL:            147.865d
IMG_START_DATE:  15480 TJD;   284 DOY;   10/10/11
IMG_START_TIME:  61200.08 SOD {17:00:00.08} UT,   84.8 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     308509206
X_OFFSET:        720 [pixels]
Y_OFFSET:        912 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       880
Y_GRB_POS:       1072
BINNING_INDEX:   1
IM_URL:          sw00436094000msuni0091.fits
SUN_POSTN:       196.85d {+13h 07m 25s}   -7.16d {-07d 09' 47"}
SUN_DIST:        103.35 [deg]   Sun_angle= 9.9 [hr] (West of Sun)
MOON_POSTN:      248.81d {+16h 35m 15s}  -24.23d {-24d 13' 53"}
MOON_DIST:        88.47 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      283.31,-45.36 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      342.63,-73.53 [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:     Mon 11 Oct 10 17:04:37 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     436094,   Seg_Num: 0
POINT_RA:         48.302d {+03h 13m 13s} (J2000)
POINT_DEC:       -65.992d {-65d 59' 30"} (J2000)
ROLL:            147.865d
IMG_START_DATE:  15480 TJD;   284 DOY;   10/10/11
IMG_START_TIME:  61200.08 SOD {17:00:00.08} UT,   84.8 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     308509206
X_OFFSET:        720 [pixels]
Y_OFFSET:        912 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       880
Y_GRB_POS:       1072
BINNING_INDEX:   1
IM_URL:          sw00436094000msuni0091.fits
SUN_POSTN:       196.85d {+13h 07m 25s}   -7.16d {-07d 09' 48"}
SUN_DIST:        103.35 [deg]   Sun_angle= 9.9 [hr] (West of Sun)
MOON_POSTN:      248.81d {+16h 35m 16s}  -24.23d {-24d 13' 53"}
MOON_DIST:        88.47 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      283.31,-45.36 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      342.63,-73.53 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN Circular #11331
J. K. Cannizzo (NASA/UMBC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester), D. N. Burrows (PSU), M. M. Chester (PSU), N. Gehrels (NASA/GSFC), J. M. Gelbord (PSU), S. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU), N. P. M. Kuin (UCL-MSSL), V. Mangano (INAF-IASFPA), K. L. Page (U Leicester), D. M. Palmer (LANL), J. L. Racusin (NASA/GSFC), A. Rowlinson (U Leicester), T. Sakamoto (NASA/UMBC), B. Sbarufatti (INAF-OAB/IASFPA), M. H. Siegel (PSU), M. Stamatikos (OSU/NASA/GSFC) and E. Troja (NASA/GSFC/ORAU) report on behalf of the Swift Team:
At 16:58:35 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 101011A (trigger=436094). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 48.298, -65.986, which is
```
   RA(J2000)  =  03h 13m 12s
   Dec(J2000) = -65d 59' 08"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows about 5 peaks with a duration of about 50 sec. The peak count rate was ~3000 counts/sec (15-350 keV), at ~0 sec after the trigger.
The XRT began observing the field at 16:59:53.5 UT, 78.2 seconds after the BAT trigger. Using promptly downlinked data we find a bright, fading, uncatalogued X-ray source located at RA, Dec 48.29427, -65.98212 which is equivalent to:
```
   RA(J2000)  = 03h 13m 10.62s
   Dec(J2000) = -65d 58' 55.6"
```
with an uncertainty of 3.8 arcseconds (radius, 90% containment). This location is 14 arcseconds from the BAT onboard position, within the BAT error circle. This position may be improved as more data are received; the latest position is available at http://www.swift.ac.uk/sper.
A power-law fit to a spectrum formed from promptly downlinked event data gives a column density in excess of the Galactic value (3.27 x 10^20 cm^-2, Kalberla et al. 2005), with an excess column of 4.4 (+3.08/-2.53) x 10^21 cm^-2 (90% confidence).
The initial flux in the 2.5 s image was 6.35e-10 erg cm^-2 s^-1 (0.2-10 keV).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 84 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 0.03.
Burst Advocate for this burst is J. K. Cannizzo (cannizzo 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:     Mon 11 Oct 10 17:11:52 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     436094,   Seg_Num: 0
POINT_RA:         48.308d {+03h 13m 14s} (J2000)
POINT_DEC:       -65.991d {-65d 59' 26"} (J2000)
POINT_ROLL:      147.859d
IMG_START_DATE:  15480 TJD;   284 DOY;   10/10/11
IMG_START_TIME:  61412.35 SOD {17:03:32.35} UT,   297.0 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.394
N_STARS:         40
X_OFFSET:        400 [pixels]
Y_OFFSET:        592 [pixels]
X_MAX:           1359 [pixels]
Y_MAX:           1551 [pixels]
DET_THRESH:      6
PHOTO_THRESH:    2
SL_URL:          sw00436094000msufc0297.fits
SUN_POSTN:       196.86d {+13h 07m 26s}   -7.17d {-07d 09' 54"}
SUN_DIST:        103.35 [deg]   Sun_angle= 9.9 [hr] (West of Sun)
MOON_POSTN:      248.89d {+16h 35m 33s}  -24.24d {-24d 14' 09"}
MOON_DIST:        88.46 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      283.31,-45.36 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      342.64,-73.53 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 11 Oct 10 17:12:09 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     436094,   Seg_Num: 0
POINT_RA:         48.308d {+03h 13m 14s} (J2000)
POINT_DEC:       -65.991d {-65d 59' 26"} (J2000)
POINT_ROLL:      147.859d
IMG_START_DATE:  15480 TJD;   284 DOY;   10/10/11
IMG_START_TIME:  61412.35 SOD {17:03:32.35} UT,   297.0 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.394
N_STARS:         40
X_OFFSET:        400 [pixels]
Y_OFFSET:        592 [pixels]
X_MAX:           1359 [pixels]
Y_MAX:           1551 [pixels]
DET_THRESH:      6
PHOTO_THRESH:    2
SL_URL:          sw00436094000msufc0297.fits
SUN_POSTN:       196.86d {+13h 07m 26s}   -7.17d {-07d 09' 55"}
SUN_DIST:        103.35 [deg]   Sun_angle= 9.9 [hr] (West of Sun)
MOON_POSTN:      248.89d {+16h 35m 34s}  -24.24d {-24d 14' 10"}
MOON_DIST:        88.46 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      283.31,-45.36 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      342.64,-73.53 [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 11 Oct 10 17:12:34 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     436094,   Seg_Num: 0
GRB_RA:           48.2959d {+03h 13m 11.01s} (J2000),
                  48.3335d {+03h 13m 20.04s} (current),
                  48.1232d {+03h 12m 29.57s} (1950)
GRB_DEC:         -65.9819d {-65d 58' 54.8"} (J2000),
                 -65.9420d {-65d 56' 31.1"} (current),
                 -66.1674d {-66d 10' 02.7"} (1950)
GRB_ERROR:       2.4 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  15480 TJD;   284 DOY;   10/10/11
IMG_START_TIME:  61291.00 SOD {17:01:31.00} UT,   175.7 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       196.86d {+13h 07m 26s}   -7.17d {-07d 09' 55"}
SUN_DIST:        103.36 [deg]   Sun_angle= 9.9 [hr] (West of Sun)
MOON_POSTN:      248.90d {+16h 35m 35s}  -24.24d {-24d 14' 11"}
MOON_DIST:        88.46 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      283.30,-45.37 [deg] galactic lon,lat of the burst
ECL_COORDS:      342.66,-73.52 [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 0.11% < P(seren) < 0.58%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 11 Oct 10 17:13:01 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     436094,   Seg_Num: 0
POINT_RA:         48.308d {+03h 13m 14s} (J2000)
POINT_DEC:       -65.991d {-65d 59' 26"} (J2000)
ROLL:            147.859d
IMG_START_DATE:  15480 TJD;   284 DOY;   10/10/11
IMG_START_TIME:  61412.35 SOD {17:03:32.35} UT,   297.0 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     308509418
X_OFFSET:        720 [pixels]
Y_OFFSET:        912 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       880
Y_GRB_POS:       1072
BINNING_INDEX:   1
IM_URL:          sw00436094000msuni0304.fits
SUN_POSTN:       196.86d {+13h 07m 26s}   -7.17d {-07d 09' 55"}
SUN_DIST:        103.35 [deg]   Sun_angle= 9.9 [hr] (West of Sun)
MOON_POSTN:      248.90d {+16h 35m 36s}  -24.24d {-24d 14' 12"}
MOON_DIST:        88.46 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      283.31,-45.36 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      342.64,-73.53 [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:     Mon 11 Oct 10 17:13:17 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     436094,   Seg_Num: 0
POINT_RA:         48.308d {+03h 13m 14s} (J2000)
POINT_DEC:       -65.991d {-65d 59' 26"} (J2000)
ROLL:            147.859d
IMG_START_DATE:  15480 TJD;   284 DOY;   10/10/11
IMG_START_TIME:  61412.35 SOD {17:03:32.35} UT,   297.0 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     308509418
X_OFFSET:        720 [pixels]
Y_OFFSET:        912 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       880
Y_GRB_POS:       1072
BINNING_INDEX:   1
IM_URL:          sw00436094000msuni0304.fits
SUN_POSTN:       196.86d {+13h 07m 26s}   -7.17d {-07d 09' 56"}
SUN_DIST:        103.35 [deg]   Sun_angle= 9.9 [hr] (West of Sun)
MOON_POSTN:      248.90d {+16h 35m 37s}  -24.24d {-24d 14' 13"}
MOON_DIST:        88.46 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      283.31,-45.36 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      342.64,-73.53 [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:     Mon 11 Oct 10 17:19:35 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     436094,   Seg_Num: 0
POINT_RA:         48.308d {+03h 13m 14s} (J2000)
POINT_DEC:       -65.991d {-65d 59' 26"} (J2000)
POINT_ROLL:      147.859d
IMG_START_DATE:  15480 TJD;   284 DOY;   10/10/11
IMG_START_TIME:  61990.93 SOD {17:13:10.93} UT,   875.6 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.567
N_STARS:         149
X_OFFSET:        160 [pixels]
Y_OFFSET:        352 [pixels]
X_MAX:           1599 [pixels]
Y_MAX:           1791 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00436094000msufc0875.fits
SUN_POSTN:       196.86d {+13h 07m 27s}   -7.17d {-07d 10' 02"}
SUN_DIST:        103.35 [deg]   Sun_angle= 9.9 [hr] (West of Sun)
MOON_POSTN:      248.97d {+16h 35m 53s}  -24.24d {-24d 14' 27"}
MOON_DIST:        88.44 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      283.31,-45.36 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      342.64,-73.53 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 11 Oct 10 17:19:54 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     436094,   Seg_Num: 0
POINT_RA:         48.308d {+03h 13m 14s} (J2000)
POINT_DEC:       -65.991d {-65d 59' 26"} (J2000)
POINT_ROLL:      147.859d
IMG_START_DATE:  15480 TJD;   284 DOY;   10/10/11
IMG_START_TIME:  61990.93 SOD {17:13:10.93} UT,   875.6 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.567
N_STARS:         149
X_OFFSET:        160 [pixels]
Y_OFFSET:        352 [pixels]
X_MAX:           1599 [pixels]
Y_MAX:           1791 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00436094000msufc0875.fits
SUN_POSTN:       196.86d {+13h 07m 27s}   -7.17d {-07d 10' 02"}
SUN_DIST:        103.35 [deg]   Sun_angle= 9.9 [hr] (West of Sun)
MOON_POSTN:      248.97d {+16h 35m 53s}  -24.24d {-24d 14' 27"}
MOON_DIST:        88.44 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      283.31,-45.36 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      342.64,-73.53 [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 11 Oct 10 17:20:59 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     436094,   Seg_Num: 0
POINT_RA:         48.308d {+03h 13m 14s} (J2000)
POINT_DEC:       -65.991d {-65d 59' 26"} (J2000)
ROLL:            147.859d
IMG_START_DATE:  15480 TJD;   284 DOY;   10/10/11
IMG_START_TIME:  61990.93 SOD {17:13:10.93} UT,   875.6 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     308509997
X_OFFSET:        719 [pixels]
Y_OFFSET:        911 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       879
Y_GRB_POS:       1071
BINNING_INDEX:   1
IM_URL:          sw00436094000msuni0882.fits
SUN_POSTN:       196.86d {+13h 07m 28s}   -7.17d {-07d 10' 03"}
SUN_DIST:        103.35 [deg]   Sun_angle= 9.9 [hr] (West of Sun)
MOON_POSTN:      248.98d {+16h 35m 56s}  -24.24d {-24d 14' 30"}
MOON_DIST:        88.44 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      283.31,-45.36 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      342.64,-73.53 [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 11 Oct 10 17:21:15 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     436094,   Seg_Num: 0
POINT_RA:         48.308d {+03h 13m 14s} (J2000)
POINT_DEC:       -65.991d {-65d 59' 26"} (J2000)
ROLL:            147.859d
IMG_START_DATE:  15480 TJD;   284 DOY;   10/10/11
IMG_START_TIME:  61990.93 SOD {17:13:10.93} UT,   875.6 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     308509997
X_OFFSET:        719 [pixels]
Y_OFFSET:        911 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       879
Y_GRB_POS:       1071
BINNING_INDEX:   1
IM_URL:          sw00436094000msuni0882.fits
SUN_POSTN:       196.86d {+13h 07m 28s}   -7.17d {-07d 10' 03"}
SUN_DIST:        103.35 [deg]   Sun_angle= 9.9 [hr] (West of Sun)
MOON_POSTN:      248.99d {+16h 35m 57s}  -24.24d {-24d 14' 30"}
MOON_DIST:        88.44 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      283.31,-45.36 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      342.64,-73.53 [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 #11332
C. B. Markwardt (GSFC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. K. Cannizzo (NASA/UMBC), J. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), 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-240 to T+302 sec from recent telemetry downlinks, we report further analysis of BAT GRB 101011A (trigger #436094) (Cannizzo, et al., GCN Circ. 11331). The BAT ground-calculated position is RA, Dec = 48.274, -65.990 deg, which is
```
   RA(J2000)  =  03h 13m 05.7s 
   Dec(J2000) = -65d 59' 23.2" 
```
with an uncertainty of 1.2 arcmin, (radius, sys+stat, 90% containment). The partial coding was 87%.
The mask-weighted light curve shows an initial FRED-like pulse starting at ~T-0.3 sec, peaking at ~T+0.6 sec, then followed by several other weaker peaks lasting out to ~T+90 sec. T90 (15-350 keV) is 71.5 +- 18.3 sec (estimated error including systematics).
The time-averaged spectrum from T-0.4 to T+84.2 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.24 +- 0.14. The fluence in the 15-150 keV band is 1.4 +- 0.1 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T-0.22 sec in the 15-150 keV band is 1.3 +- 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/436094/BA/
GCN Circular #11333
P.A. Evans, M.R. Goad, J.P. Osborne and A.P. Beardmore (U. Leicester) report on behalf of the Swift-XRT team.
Using 1274 s of XRT Photon Counting mode data and 2 UVOT images for GRB 101011A, 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 = 48.29486, -65.98182 which is equivalent to:
```
RA (J2000): 03h 13m 10.77s
Dec (J2000): -65d 58' 54.5"
```
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 #11334
S. T. Holland (CRESST/GSFC/USRA) and M. De Pasquale (UCL-MSSL) report on the behalf of the Swift UVOT team:
The Swift/UVOT observed the field of GRB 101011A starting 66 s after the BAT trigger (Cannizzo, et al., 2010, GCN Circ. 11331). Settled observations started at 85 s. We detect an optical source that may be fading and is not present in the USNO-B1.0 catalogue, 2MASS point source catalogue, or the DSS. The preliminary UVOT position is:
```
     RA (J2000) =  03:13:10.47  =  48.29363 (deg)
    Dec (J2000) = -65:58:54.7   = -65.98186 (deg)
```
with an estimated uncertainty of 1.14 arcsec (radius, 90% confidence, statistical + systematic). This is 1.84 arcsec west of the UVOT-enhanced XRT position (Evans, et al., 2010, GCN Circ. 11333).
Preliminary white magnitudes and 3-sigma upper limits for the source are:
```
Filter      T_start   T_stop    Exp(s)      Mag  Err
-----------------------------------------------------------
white (fc)       85      235       147    21.38 0.34
white           876     1025       147   >21.7
-----------------------------------------------------------
```
The quoted magnitudes and upper limits have not been corrected for the expected Galactic extinction along the line of sight corresponding to a reddening of E_{B-V} = 0.03 mag (Schlegel, et al., 1998, ApJS, 500, 525). All photometry is on the UVOT photometry system described in Poole et al. (2008, MNRAS, 383, 627).
GCN Circular #11335
A. Rowlinson (U. Leicester) and J. K. Cannizzo (NASA/UMBC) report on behalf of the Swift-XRT team:
We have analysed 3.9 ks of XRT data for GRB 101011A (Cannizzo et al. GCN Circ. 11331), from 66 s to 7.2 ks after the BAT trigger. The data comprise 86 s in Windowed Timing (WT) mode (the first 8 s were taken while Swift was slewing) with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Evans et al. (GCN. Circ 11333).
The light curve can be modelled with a series of power-law decays. The initial decay index is alpha=0.8 (+0.5, -1.7). At T+116 s the decay steepens to an alpha of 2.49 (+0.18, -0.19) before breaking again at T+656 s to a final decay with index alpha=1.13 (+0.28, -0.25).
A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 1.41 (+0.20, -0.19). The best-fitting absorption column is 7.6 (+6.0, -4.3) x 10^20 cm^-2, consistent with the Galactic value of 3.3 x 10^20 cm^-2 (Kalberla et al. 2005). The PC mode spectrum has a photon index of 1.94 (+0.26, -0.30) and a best-fitting absorption column of 1.5 (+/-0.8) x 10^21 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 4.2 x 10^-11 (5.7 x 10^-11) erg cm^-2 count^-1.
If the light curve continues to decay with a power-law decay index of 1.13, the count rate at T+24 hours will be 4.2 x 10^-4 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 1.8 x 10^-14 (2.4 x 10^-14) erg cm^-2 s^-1.
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00436094.
This circular is an official product of the Swift-XRT team.
GCN Circular #11336
M. Laas-Bourez(UWA/ICRAR), D. Coward(UWA), D. Blair (UWA), B. Gendre (ASDC/OAR), M. Boer (OHP-CNRS), A. Klotz (CESR-UPS-CNRS), P. Thierry (CESR-UPS-CNRS) report:
We imaged the field of GRB 101011A detected by SWIFT (trigger 436094) with the Zadko robotic telescope (D=100cm) located at the observatory - Gingin, Australia.
The observations started 3932.8s after the GRB trigger (3910s after the notice). The elevation of the field increased from 55 degrees above horizon and weather conditions were good with a high level of humidity.
30 images have been maded with a duration of 180.0s each (see the description in Klotz et al., 2006, A&A 451, L39). At the position of the XRT afterglow (Evans et al., GCN 11333), we do not detect any source with a limiting magnitude of g> 19.5 on the single images.
We co-added a series of exposures between t0+3932.8s to t0+9869.4s We do not detect any afterglow, with a limiting magnitude of g> 21.5
Magnitudes were estimated with the nearby USNO-B1 stars and are not corrected for galactic dust extinction.
N.B. Galactic coordinates are lon=283.3069 lat=-45.3657
This message may be cited.
GCN Circular #11337
M. Nardini, T. Kruehler (both MPE Garching), S. Klose, A. Rossi (both TLS Tautenburg), and J. Greiner (MPE Garching) report on behalf of the GROND team:
We observed the field of GRB 101011A (Swift trigger #436094; Cannizzo et al. 2010, GCN #11331; Markwardt et al. 2010, GCN #11332) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2 m MPI/ESO telescope on LaSilla. Observations started at 00:10 UT, October 12, i.e. seven hours after the burst once the field became visible over La Silla.
In stacked images with a mid-time of 1:06 UT (seeing 2.2 arcsec; mean airmass 1.8) we do not detect any source at the position of the faint optical transient seen by UVOT (Holland et al. 2010, GCN #11334) down to the following limits (3 sigma, AB system):
```
g' > 24.4,
r' > 23.7,
i' > 22.7,
z' > 22.5,
J  > 22.1,
H  > 21.5.
```
These upper limits have been calibrated based on USNO and 2MASS stars.

GCN Circular #11338
M. De Pasquale (MSSL-UCL) and J. Cannizzo (GSFC) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 101011A 85s after the BAT trigger (Cannizzo et al., GCN Circ. 11331). Summing up white band exposures up to 1374s after the trigger, including the finding chart, we find a strong indication (2.9 sigma level) of an uncatalogued source at

 
 RA = 03h 13m 10.77s, Dec = -65d 58m 54.0s (J2000)
 RA = 48.29487, Dec = -65.98167 (J2000)

with an error of 1.1 arcseconds. This refined position is within 0.5 arcseconds from the XRT refined position (Evans et al., GCN Circ. 11333) and supersedes the previous onegiven in Holland et al. (GCN Circ. 11334). In the individual and summed UVOT exposures in other filters, no optical afterglow is detected.� Preliminary 3-sigma upper limits using the UVOT photometric system (Poole et al. 2008, MNRAS, 383, 627) for the first finding chart (FC) exposure and subsequent exposures are:

Filter  T_start(s)  T_stop(s)  Exp(s)  Mag

white(FC)���������� 85��������� 235������147      >21.3
white���������������85�������  1374������373���21.7 � 0 0.4
white�������������4311���� ��  6627������393      >22 
v������������������627��  � ��18725�����1375      >20.8
b������������������533�����   41918�����1055      >21.4
u������������������297�����   41737�����2865      >22.0
uw1��������������� 577������  47696�����2595      >21.7
um2��������������� 652�����   46017�����2996      >21.7
uw2��������������� 603������  17812����� 376      >21.5

The values quoted above are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.03 in the direction of the burst (Schlegel et al. 1998).

GCN Circular #11343
J.C. Tello, M. Jelinek, A.J. Castro-Tirado, J. Gorosabel (IAA-CSIC, Granada), A, de Ugarte Postigo (DARK/NBI), W. Allen (Vintage Lane Obs.), Ph. Yock and Kuan-Yu Lin (Auckland Univ.), report on behalf of a larger collaboration:
"We have carried out observations of the Swift GRB 101011A (Cannizzo et al. GCNC 11331) on Oct 12.4751 - 12.6972 UT (~23.76 hr after the onset of the burst, mean observing time) with the 0.6m Yock-Allen robotic telescope (BOOTES-3) located in Blenheim, New Zealand.
We do not detect any optical source within the Swift-XRT refined error circle (Evans et al. GCNC 11333). The 3 sigma limiting magnitude of the co-added unfiltered image (Texp=165x60s) is R ~ 19.0, using USNO-B1.0 as photometric reference.
GCN Report 305.1
GCN_Report 305.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_305_1.pdf by J.K. Cannizzo at NASA/UMBC titled: "Final report on Swift Observations of GRB 101011A"
GCN Circular #11344
Michael Burgess (UAH) reports on behalf of the Fermi GBM Team:
"At 16:58:36.53 UT on 11 October 2010, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 101011A (trigger 308509118 /101011707) which was also detected by the SWIFT-BAT (Cannizzo et al. 2010, GCN 11331) The GBM on-ground location is consistent with the Swift position. This burst was also independently detected by INTEGRAL SPI-ACS. The angle from the Fermi LAT boresight is 144 degrees.
The GBM light curve consists of a several moderately bright peaks with a duration (T90) of about 35.01 s (8-1000 keV). The time-averaged spectrum from T0-0.768 s to T0+35.78 s is best fit by a power law function with an exponential high energy cutoff. The power law index is -.49 +/- .25 and the cutoff energy, parameterized as Epeak, is 296.6 +/- 49.4 keV
The event fluence (8-1000 keV) in this time interval is (5.24 +/- .39)E-6 erg/cm^2. The .256-sec peak photon flux measured starting from T0+25.15 s in the 8-1000 keV band is 5.16 +/- 1.6 ph/s/cm^2.
The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN Circular #11362
M. Konishi, T. Morokuma, S. Koshida, N. Matsunaga, T. Minezaki, and Y. Yoshii (University of Tokyo) report on behalf of the TAO project team:
We observerd GRB 101011A (Cannizzo et al., GCN 11331) with the near-infrared camera ANIR mounted on the miniTAO 1.0m telescope at the University of Tokyo Atacama Observatory on the summit of Co. Chajnantor (5640m altitude) in the northern Chile.
The Ks-band observation started from 2010-10-13 06:20 UT (38hours after the burst), and total exposure time was 1620sec. No object was detected within the enhanced XRT error circle (Evans et al., GCNC 11333).
The three sigma upper limit is listed below, where the flux calibration was carried out using 2MASS stars within the FoV.
```
Band Mid-UT AB-Mag
----------------------------
Ks 06:35:02 >19.7
----------------------------
```
1512.07670 from 25 Dec 15
Jun-Jie Wei et al.: Testing Einstein's Equivalence Principle with Fast Radio Bursts
The accuracy of Einstein's Equivalence Principle (EEP) can be tested with the observed time delays between correlated particles or photons that are emitted from astronomical sources. Assuming as a lower limit that the time delays are caused mainly by the gravitational potential of the Milky Way, we prove that fast radio bursts (FRBs) of cosmological origin can be used to constrain the EEP with high accuracy. Taking FRB 110220 and two possible FRB/gamma-ray burst (GRB) association systems (FRB/GRB 101011A and FRB/GRB 100704A) as examples, we obtain a strict upper limit on the differences of the parametrized post-Newtonian parameter $\gamma$ values as low as $\left[\gamma(1.23\; \rm GHz)-\gamma(1.45\; \rm GHz)\right]<4.36\times10^{-9}$. This provides the most stringent limit up to date on the EEP through the relative differential variations of the $\gamma$ parameter at radio energies, improving by 1 to 2 orders of magnitude the previous results at other energies based on supernova 1987A and GRBs.

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Jochen Greiner, last update: 28-Dec-2015 [Disclaimer]