Gamma-ray Burst 110106A

(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:     Thu 06 Jan 11 15:25:38 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     441664,   Seg_Num: 0
GRB_RA:           79.285d {+05h 17m 08s} (J2000),
                  79.551d {+05h 18m 12s} (current),
                  78.081d {+05h 12m 19s} (1950)
GRB_DEC:         +64.184d {+64d 11' 02"} (J2000),
                 +64.195d {+64d 11' 42"} (current),
                 +64.129d {+64d 07' 45"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       3276 [cnts]    Image_Peak=149 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   150     E_range: 25-100 keV
BKG_INTEN:       21416 [cnts]
BKG_TIME:        55497.46 SOD {15:24:57.46} UT
BKG_DUR:         8 [sec]
GRB_DATE:        15567 TJD;     6 DOY;   11/01/06
GRB_TIME:        55516.21 SOD {15:25:16.21} UT
GRB_PHI:         173.54 [deg]
GRB_THETA:        44.23 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     11.53 [sigma]
IMAGE_SIGNIF:    8.16 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +2  -2  +0  +0 +69  +0 
SUN_POSTN:       287.30d {+19h 09m 13s}  -22.48d {-22d 29' 02"}
SUN_DIST:        134.45 [deg]   Sun_angle= -10.1 [hr] (East of Sun)
MOON_POSTN:      313.48d {+20h 53m 55s}  -13.92d {-13d 55' 10"}
MOON_DIST:       117.73 [deg]
MOON_ILLUM:      5 [%]
GAL_COORDS:      147.32, 14.80 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       83.84, 40.97 [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 = 132.62,-12.22 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 06 Jan 11 15:27:21 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     441664,   Seg_Num: 0
POINT_RA:         79.338d {+05h 17m 21s} (J2000)
POINT_DEC:       +64.210d {+64d 12' 36"} (J2000)
IMG_START_DATE:  15567 TJD;     6 DOY;   11/01/06
IMG_START_TIME:  55622.38 SOD {15:27:02.38} UT,   106.2 [sec] since BAT Trigger Time
COUNTS:          3    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:     Thu 06 Jan 11 15:28:46 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     441664,   Seg_Num: 0
POINT_RA:         79.337d {+05h 17m 21s} (J2000)
POINT_DEC:       +64.210d {+64d 12' 37"} (J2000)
POINT_ROLL:      322.590d
IMG_START_DATE:  15567 TJD;     6 DOY;   11/01/06
IMG_START_TIME:  55625.70 SOD {15:27:05.70} UT,   109.5 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        0.804
N_STARS:         82
X_OFFSET:        319 [pixels]
Y_OFFSET:        341 [pixels]
X_MAX:           1278 [pixels]
Y_MAX:           1300 [pixels]
DET_THRESH:      8
PHOTO_THRESH:    3
SL_URL:          sw00441664000msufc0109.fits
SUN_POSTN:       287.31d {+19h 09m 14s}  -22.48d {-22d 29' 01"}
SUN_DIST:        134.44 [deg]   Sun_angle= -10.2 [hr] (East of Sun)
MOON_POSTN:      313.51d {+20h 54m 01s}  -13.91d {-13d 54' 37"}
MOON_DIST:       117.72 [deg]
MOON_ILLUM:      5 [%]
GAL_COORDS:      147.30, 14.83 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       83.88, 41.00 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 06 Jan 11 15:29:24 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     441664,   Seg_Num: 0
POINT_RA:         79.337d {+05h 17m 21s} (J2000)
POINT_DEC:       +64.210d {+64d 12' 37"} (J2000)
POINT_ROLL:      322.590d
IMG_START_DATE:  15567 TJD;     6 DOY;   11/01/06
IMG_START_TIME:  55625.70 SOD {15:27:05.70} UT,   109.5 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        0.804
N_STARS:         82
X_OFFSET:        319 [pixels]
Y_OFFSET:        341 [pixels]
X_MAX:           1278 [pixels]
Y_MAX:           1300 [pixels]
DET_THRESH:      8
PHOTO_THRESH:    3
SL_URL:          sw00441664000msufc0109.fits
SUN_POSTN:       287.31d {+19h 09m 14s}  -22.48d {-22d 29' 01"}
SUN_DIST:        134.44 [deg]   Sun_angle= -10.2 [hr] (East of Sun)
MOON_POSTN:      313.51d {+20h 54m 03s}  -13.91d {-13d 54' 30"}
MOON_DIST:       117.72 [deg]
MOON_ILLUM:      5 [%]
GAL_COORDS:      147.30, 14.83 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       83.88, 41.00 [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:     Thu 06 Jan 11 15:30:05 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     441664,   Seg_Num: 0
POINT_RA:         79.337d {+05h 17m 21s} (J2000)
POINT_DEC:       +64.210d {+64d 12' 37"} (J2000)
ROLL:            322.590d
IMG_START_DATE:  15567 TJD;     6 DOY;   11/01/06
IMG_START_TIME:  55625.70 SOD {15:27:05.70} UT,   109.5 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     316020432
X_OFFSET:        638 [pixels]
Y_OFFSET:        660 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       798
Y_GRB_POS:       820
BINNING_INDEX:   1
IM_URL:          sw00441664000msuni0116.fits
SUN_POSTN:       287.31d {+19h 09m 14s}  -22.48d {-22d 29' 00"}
SUN_DIST:        134.44 [deg]   Sun_angle= -10.2 [hr] (East of Sun)
MOON_POSTN:      313.52d {+20h 54m 04s}  -13.91d {-13d 54' 23"}
MOON_DIST:       117.71 [deg]
MOON_ILLUM:      5 [%]
GAL_COORDS:      147.30, 14.83 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       83.88, 41.00 [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:     Thu 06 Jan 11 15:30:21 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     441664,   Seg_Num: 0
GRB_RA:           79.285d {+05h 17m 08s} (J2000),
                  79.551d {+05h 18m 12s} (current),
                  78.081d {+05h 12m 19s} (1950)
GRB_DEC:         +64.184d {+64d 11' 02"} (J2000),
                 +64.195d {+64d 11' 42"} (current),
                 +64.129d {+64d 07' 45"} (1950)
GRB_DATE:        15567 TJD;     6 DOY;   11/01/06
GRB_TIME:        55516.21 SOD {15:25:16.21} UT
TRIGGER_INDEX:   150
GRB_PHI:         173.54 [deg]
GRB_THETA:        44.23 [deg]
DELTA_TIME:      45.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     11.53 [sigma]
IMAGE_SIGNIF:    8.16 [sigma]
LC_URL:          sw00441664000msb.lc
SUN_POSTN:       287.31d {+19h 09m 14s}  -22.48d {-22d 29' 00"}
SUN_DIST:        134.44 [deg]   Sun_angle= -10.1 [hr] (East of Sun)
MOON_POSTN:      313.52d {+20h 54m 05s}  -13.91d {-13d 54' 20"}
MOON_DIST:       117.71 [deg]
MOON_ILLUM:      5 [%]
GAL_COORDS:      147.32, 14.80 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       83.84, 40.97 [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 = 132.62,-12.22 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 06 Jan 11 15:30:41 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     441664,   Seg_Num: 0
POINT_RA:         79.337d {+05h 17m 21s} (J2000)
POINT_DEC:       +64.210d {+64d 12' 37"} (J2000)
ROLL:            322.590d
IMG_START_DATE:  15567 TJD;     6 DOY;   11/01/06
IMG_START_TIME:  55625.70 SOD {15:27:05.70} UT,   109.5 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     316020432
X_OFFSET:        638 [pixels]
Y_OFFSET:        660 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       798
Y_GRB_POS:       820
BINNING_INDEX:   1
IM_URL:          sw00441664000msuni0116.fits
SUN_POSTN:       287.31d {+19h 09m 14s}  -22.48d {-22d 29' 00"}
SUN_DIST:        134.44 [deg]   Sun_angle= -10.2 [hr] (East of Sun)
MOON_POSTN:      313.52d {+20h 54m 05s}  -13.90d {-13d 54' 17"}
MOON_DIST:       117.71 [deg]
MOON_ILLUM:      5 [%]
GAL_COORDS:      147.30, 14.83 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       83.88, 41.00 [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:     Thu 06 Jan 11 15:31:20 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     441664,   Seg_Num: 0
GRB_RA:           79.3072d {+05h 17m 13.72s} (J2000),
                  79.5729d {+05h 18m 17.50s} (current),
                  78.1033d {+05h 12m 24.78s} (1950)
GRB_DEC:         +64.1739d {+64d 10' 26.0"} (J2000),
                 +64.1851d {+64d 11' 06.4"} (current),
                 +64.1194d {+64d 07' 09.7"} (1950)
GRB_ERROR:       4.8 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  15567 TJD;     6 DOY;   11/01/06
IMG_START_TIME:  55634.00 SOD {15:27:14.00} UT,   117.8 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       287.31d {+19h 09m 14s}  -22.48d {-22d 29' 00"}
SUN_DIST:        134.46 [deg]   Sun_angle= -10.2 [hr] (East of Sun)
MOON_POSTN:      313.53d {+20h 54m 07s}  -13.90d {-13d 54' 10"}
MOON_DIST:       117.71 [deg]
MOON_ILLUM:      5 [%]
GAL_COORDS:      147.33, 14.80 [deg] galactic lon,lat of the burst
ECL_COORDS:       83.86, 40.96 [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 0.11% < P(seren) < 0.58%.

GCN Circular #11520
V. Mangano (INAF-IASFPA), A. P. Beardmore (U Leicester), D. N. Burrows (PSU), P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), J. M. Gelbord (PSU), C. Gronwall (PSU), C. Guidorzi (U Ferrara), S. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU), H. A. Krimm (CRESST/GSFC/USRA), O. M. Littlejohns (U Leicester), C. B. Markwardt (NASA/GSFC), F. E. Marshall (NASA/GSFC), P. T. O'Brien (U Leicester), C. Pagani (U Leicester), K. L. Page (U Leicester), D. M. Palmer (LANL), B. Sbarufatti (INAF-OAB/IASFPA), M. H. Siegel (PSU), M. Stamatikos (OSU/NASA/GSFC), R. L. C. Starling (U Leicester), M. C. Stroh (PSU), E. Troja (NASA/GSFC/ORAU) and T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:
At 15:25:16 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 110106A (trigger=441664). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 79.285, +64.184 which is
```
   RA(J2000) = 05h 17m 08s
   Dec(J2000) = +64d 11' 02"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a double-peaked structure with a total duration of about 4 sec. The peak count rate was ~1000 counts/sec (15-350 keV), at ~0 sec after the trigger.
The XRT began observing the field at 15:27:02.4 UT, 106.2 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source located at RA, Dec 79.30730, 64.17394 which is equivalent to:
```
   RA(J2000)  = 05h 17m 13.75s
   Dec(J2000) = +64d 10' 26.2"
```
with an uncertainty of 4.8 arcseconds (radius, 90% containment). This location is 49 arcseconds from the BAT onboard position, within the BAT error circle. This position may be improved as more data are received; the latest position is available at http://www.swift.ac.uk/sper. We cannot determine whether the source is fading at the present time.
A power-law fit to a spectrum formed from promptly downlinked event data gives a column density in excess of the Galactic value (1.27 x 10^21 cm^-2, Kalberla et al. 2005), with an excess column of 4.3 (+4.88/-3.82) x 10^21 cm^-2 (90% confidence).
UVOT took a finding chart exposure of 52 seconds with the White filter starting 109 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 BAT 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 0.24.
Burst Advocate for this burst is V. Mangano (vanessa AT ifc.inaf.it). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/too.html.)

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 06 Jan 11 16:28:16 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     441664,   Seg_Num: 0
POINT_RA:         79.221d {+05h 16m 53s} (J2000)
POINT_DEC:       +64.195d {+64d 11' 41"} (J2000)
POINT_ROLL:      322.540d
IMG_START_DATE:  15567 TJD;     6 DOY;   11/01/06
IMG_START_TIME:  59045.96 SOD {16:24:05.96} UT,   3529.8 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        5.531
N_STARS:         98
X_OFFSET:        354 [pixels]
Y_OFFSET:        733 [pixels]
X_MAX:           1313 [pixels]
Y_MAX:           1692 [pixels]
DET_THRESH:      20
PHOTO_THRESH:    12
SL_URL:          sw00441664000msufc3529.fits
SUN_POSTN:       287.35d {+19h 09m 25s}  -22.48d {-22d 28' 43"}
SUN_DIST:        134.40 [deg]   Sun_angle= -10.1 [hr] (East of Sun)
MOON_POSTN:      314.00d {+20h 56m 00s}  -13.74d {-13d 44' 12"}
MOON_DIST:       117.34 [deg]
MOON_ILLUM:      5 [%]
GAL_COORDS:      147.29, 14.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       83.81, 40.99 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 06 Jan 11 16:28:32 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     441664,   Seg_Num: 0
POINT_RA:         79.221d {+05h 16m 53s} (J2000)
POINT_DEC:       +64.195d {+64d 11' 41"} (J2000)
POINT_ROLL:      322.540d
IMG_START_DATE:  15567 TJD;     6 DOY;   11/01/06
IMG_START_TIME:  59045.96 SOD {16:24:05.96} UT,   3529.8 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        5.531
N_STARS:         98
X_OFFSET:        354 [pixels]
Y_OFFSET:        733 [pixels]
X_MAX:           1313 [pixels]
Y_MAX:           1692 [pixels]
DET_THRESH:      20
PHOTO_THRESH:    12
SL_URL:          sw00441664000msufc3529.fits
SUN_POSTN:       287.35d {+19h 09m 25s}  -22.48d {-22d 28' 43"}
SUN_DIST:        134.40 [deg]   Sun_angle= -10.1 [hr] (East of Sun)
MOON_POSTN:      314.00d {+20h 56m 00s}  -13.74d {-13d 44' 10"}
MOON_DIST:       117.33 [deg]
MOON_ILLUM:      5 [%]
GAL_COORDS:      147.29, 14.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       83.81, 40.99 [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:     Thu 06 Jan 11 16:28:42 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     441664,   Seg_Num: 0
GRB_RA:           79.3075d {+05h 17m 13.80s} (J2000),
                  79.5732d {+05h 18m 17.57s} (current),
                  78.1036d {+05h 12m 24.85s} (1950)
GRB_DEC:         +64.1739d {+64d 10' 26.0"} (J2000),
                 +64.1851d {+64d 11' 06.4"} (current),
                 +64.1194d {+64d 07' 09.7"} (1950)
GRB_ERROR:       3.9 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  15567 TJD;     6 DOY;   11/01/06
IMG_START_TIME:  55634.00 SOD {15:27:14.00} UT,   117.8 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       287.35d {+19h 09m 25s}  -22.48d {-22d 28' 43"}
SUN_DIST:        134.44 [deg]   Sun_angle= -10.1 [hr] (East of Sun)
MOON_POSTN:      314.00d {+20h 56m 00s}  -13.74d {-13d 44' 08"}
MOON_DIST:       117.38 [deg]
MOON_ILLUM:      5 [%]
GAL_COORDS:      147.33, 14.80 [deg] galactic lon,lat of the burst
ECL_COORDS:       83.86, 40.96 [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:     Thu 06 Jan 11 16:30:23 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     441664,   Seg_Num: 0
POINT_RA:         79.221d {+05h 16m 53s} (J2000)
POINT_DEC:       +64.195d {+64d 11' 41"} (J2000)
ROLL:            322.540d
IMG_START_DATE:  15567 TJD;     6 DOY;   11/01/06
IMG_START_TIME:  59045.96 SOD {16:24:05.96} UT,   3529.8 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     316023852
X_OFFSET:        673 [pixels]
Y_OFFSET:        1052 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       833
Y_GRB_POS:       1212
BINNING_INDEX:   1
IM_URL:          sw00441664000msuni3536.fits
SUN_POSTN:       287.35d {+19h 09m 25s}  -22.48d {-22d 28' 42"}
SUN_DIST:        134.40 [deg]   Sun_angle= -10.1 [hr] (East of Sun)
MOON_POSTN:      314.02d {+20h 56m 04s}  -13.73d {-13d 43' 50"}
MOON_DIST:       117.32 [deg]
MOON_ILLUM:      5 [%]
GAL_COORDS:      147.29, 14.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       83.81, 40.99 [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:     Thu 06 Jan 11 16:30:35 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     441664,   Seg_Num: 0
POINT_RA:         79.221d {+05h 16m 53s} (J2000)
POINT_DEC:       +64.195d {+64d 11' 41"} (J2000)
ROLL:            322.540d
IMG_START_DATE:  15567 TJD;     6 DOY;   11/01/06
IMG_START_TIME:  59045.96 SOD {16:24:05.96} UT,   3529.8 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     316023852
X_OFFSET:        673 [pixels]
Y_OFFSET:        1052 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       833
Y_GRB_POS:       1212
BINNING_INDEX:   1
IM_URL:          sw00441664000msuni3536.fits
SUN_POSTN:       287.35d {+19h 09m 25s}  -22.48d {-22d 28' 42"}
SUN_DIST:        134.40 [deg]   Sun_angle= -10.1 [hr] (East of Sun)
MOON_POSTN:      314.02d {+20h 56m 04s}  -13.73d {-13d 43' 48"}
MOON_DIST:       117.32 [deg]
MOON_ILLUM:      5 [%]
GAL_COORDS:      147.29, 14.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       83.81, 40.99 [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 #11521
L.P. Xin, Z. X. Ling, Y.L. Qiu, J.Y. Wei, J. Wang, J.S. Deng, C. Wu, X. H. Han on behalf of EAFON report:
We began to observe GRB110106A (Mangano et al., GCN 11520 ) with Xinglong TNT telescope at 15:35:15.946 (UT), 10min after the burst. A series of white and R-band images were obtained. No any new source was found within the errorbox of X-ray counterpart (Mangano et al., GCN 11520 ), down to 3 sigma upper limit of R~19.8 mag at the mean time of 11 min after the burst.
This message may be cited.
For more information about Xinglong GRBs Follow-up observations, please visit the website: http://www.xinglong-naoc.org/grb/
GCN Circular #11523
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, A. Popov Ural State University, Kourovka
K.Ivanov, O.Chuvalaev, V.Poleschuk, E.Konstantinov, V.Lenok, O.Gres, S.Yazev, N.M.Budnev, Irkutsk State University
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 in Kislovodsk was pointed to the GRB110106A (Mangano et al., GCN Circ 1152) 17 sec s after notice time and 41 sec after GRB time at 2011-01-06 15:25:57.96 UT in two polarizations+filter R. On our first (10s exposure) set we haven`t found optical transient within SWIFT XRT error-box. The 5-sigma upper limit has been about 16.0mag We marginally see OT about 15.5 mag in XRT error box on second set at 2011-01-06 15:26:19 (starting 69 s after trigger time with 10 sec exposition).
We see the like galaxy object near (~15" distance) XRT error box ~19-20 mag on later images. But, there is no object in NASA/IPAC EXTRAGALACTIC DATABASE. The same object is presented at DSS image.
The redaction is continueted.
The message may be cited.
mailto: lipunov@sai.msu.ru
GCN Circular #11524
D. Malesani (DARK/NBI), S. Covino (INAF/Brera), L.A. Antonelli (INAF/Roma), D. Fugazza (INAF/Brera), A. Harutyunyan (INAF/TNG), on behalf of the CIBO collaboration, report:
We observed the field of GRB 110106A (Mangano et al., GCN 11520) using the 3.6m TNG telescope, located in the Canary Islands. A set of R- and I-band images were acquired starting on Jan 6.8265 UT (4.41 hr after the GRB) for a total exposure time of 20 minutes per filter. The seeing was 1.5" in the R band.
Within the XRT error circle (Mangano et al., GCN 11520), we marginally detect a source in both R and I. Its coordinates are (J2000):
```
RA = 05:17:14.14
Dec = 64:10:28.1
```
and its magnitude is R ~ 24.5. In addition, we note the presence of a galaxy just outside the current X-ray error circle (its centroid being 7.3+-3.6" away of the XRT position). It is visible also in the DSS images and has a magnitude R = 18.2 (assuming R = 17.54 for the star at RA=05:17:11.43, Dec=+64:10:10.88).
We cannot assess whether any of the sources are variable, and so their relation to GRB 110106A remains to be proven.
Further observations are in progress.
GCN Circular #11526
J.P. Osborne, A.P. Beardmore, P.A. Evans and M.R. Goad (U. Leicester) report on behalf of the Swift-XRT team.
Using 3088 s of XRT Photon Counting mode data and 6 UVOT images for GRB 110106A, 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 = 79.30578, +64.17349 which is equivalent to:
```
RA (J2000): 05h 17m 13.39s
Dec (J2000): +64d 10' 24.6"
```
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 #11527
M. Stamatikos (OSU), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC), V. Mangano (INAF-IASFPA), D. M. Palmer (LANL), A. M. Parsons (GSFC), T. Sakamoto (GSFC/UMBC), G. Sato (ISAS), 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 110106A (trigger #441664) (Mangano, et al., GCN Circ. 11520). The BAT ground-calculated position is RA, Dec = 79.295, 64.199 deg, which is
```
   RA(J2000)  =  05h 17m 10.8s 
   Dec(J2000) = +64d 11' 56.4" 
```
with an uncertainty of 2.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 34%.
The mask-weighted light curve shows a pulse starting at ~T-1 sec and lasting about 6 sec. T90 (15-350 keV) is 4.3 +- 1.1 sec (estimated error including systematics).
The time-averaged spectrum from T-1.0 to T+3.9 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.71 +- 0.28. The fluence in the 15-150 keV band is 3.0 +- 0.5 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T+0.32 sec in the 15-150 keV band is 1.9 +- 0.3 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/441664/BA/
GCN Circular #11529
V. Mangano (INAF-IASFPA) and B. Sbarufatti (INAF-OAB/INAF-IASFPA) report on behalf of the Swift-XRT team:
We have analysed 7.0 ks of XRT data for GRB 110106A (Mangano et al. GCN Circ. 11520), from 91 s to 17.3 ks after the BAT trigger. The data comprise 8 s in Windowed Timing (WT) mode (taken while Swift was slewing), with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Osborne et al. (GCN. Circ 11526).
The late-time light curve (from T0+3.5 ks) can be modelled with a power-law decay with a decay index of alpha=1.2 (+0.4, -0.3).
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 2.7 (+0.4, -0.5). The best-fitting absorption column is 4.0 (+1.6, -1.4) x 10^21 cm^-2, in excess of the Galactic value of 1.3 x 10^21 cm^-2 (Kalberla et al. 2005). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.4 x 10^-11 (1.0 x 10^-10) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     4.0 (+1.6, -1.4) x 10^21 cm^-2
Galactic foreground: 1.3 x 10^21 cm^-2
Excess significance: 4.8 sigma
Photon index:	     2.7 (+0.4, -0.5)
```
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00441664.
This circular is an official product of the Swift-XRT team.
GCN Circular #11530
S. Piranomonte (INAF/Roma), D. Malesani (DARK/NBI), V. D'Elia (ASDC and INAF/Roma), S. Covino (INAF/Brera), L.A. Antonelli (INAF/Roma), D. Fugazza (INAF/Brera), A. Harutyunyan (INAF/TNG), G. Tessicini (INAF/TNG), report on behalf of a larger collaboration:
Following the release of the refined X-ray position (Osborne et al., GCN 11526) of the afterglow of GRB 110106A (Mangano et al., GCN 11520), we further inspected our TNG images. The faint object reported by Malesani et al. (GCN 11524) is significantly outside the revised error circle, and is thus likely unrelated to the GRB.
The new X-ray position however partially covers the outskirts of the extended object mentioned in GCN 11520.
A 1-hr TNG spectrum of this galaxy, starting on Jan 6.878 UT (5.64 hr after the GRB) and covering the wavelength range 3800-8000 AA, reveals the presence of a few emission features, which we interpret as Halpha, [NII] 6583, [SII] 6730, and weak Hbeta at a common redshift z=0.093. At the same redshift, we also see Ca H and K in absorption.
While the XRT error circle (1.7" radius) overlaps the stellar light from the galaxy, its center lies 4.3" away of the galaxy nucleus (7.3 kpc in projection at z=0.093). Such large offset would be more typical of short-duration GRBs, although the duration of GRB 110106A (T90 = 4.3+-1.1 s; Stamatikos et al., GCN 11527) seems to exclude this hypothesis. The relation between the galaxy and the GRB cannot be conclusively established at this point.
GCN Circular #11531
S. T. Holland (CRESST/USRA/GSFC) and V. Mangano (INAF-IASFP) report on behalf of the Swift/UVOT team:
The Swift/UVOT observed the field of GRB 110106A starting 92 s after the BAT trigger (Mangano, et al., 2011, GCN Circ. 11520). Settled observations started at 110 s. We do no detect an optical afterglow in any of the UVOT filters. Preliminary 3-sigma upper limits for detecting a source in the finding charts and in the co-added images, are
```
Filter      T_start   T_stop    Exp(s)      Mag
-----------------------------------------------
white (fc)      110      162        52    >20.2
               3530     3680       150    >20.3

    v          3687   16,046      1278    >20.3
    b          4508   10,281      1082    >21.1
    u          4302     5939       393    >20.4
 uvw1          4097     5734       393    >20.2
 uvm2          3892     5529       393    >20.1
 uvw2          4918   11,717       706    >20.9
white           110   11,194      1280    >22.0
-----------------------------------------------
```
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} = 0.24 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 #11535
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 110106A (Mangano et al., GCN 11520) 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 2011-01-06 15:26:22 UT (~65 sec after the burst). We did not find any new point source within the enhanced XRT error circle (Osborne et al., GCNC 11526) in all the three bands.
Three sigma upper limits of the OT are listed below. We used GSC2.3 catalog for flux calibration.
```
T0+[day]   MID-UT   T-EXP[sec]    g'     Rc     Ic
------------------------------------------------------
0.00424    15:31:23     540.0   >20.0  >19.7  >18.8
0.09936    17:48:21    5040.0   >20.8  >20.4  >19.5
------------------------------------------------------
T0+ : Elapsed time after the burst [day]
T-EXP: Total Exposure time [sec]
```
GCN Circular #11536
T. Yatsu, Y. Nishikawa, D. Yonetoku, T. Murakami and S. Gima (Kanazawa University) on behalf of the ISAS-Kanazawa collaboration, report:
We observed the field of GRB 110106A (Mangano et al., GCN 11520) in Rc-band, using the 1.3m ISAS-Kanazawa telescope, located at Sagamihara. The observation started on Jan 6.64375 UT at ~2 min after the burst. No any new source was found within the revised position of X-ray counterpart (Osborne et al., GCN 11526), down to the 3 sigma upper limit of Rc~17.6 mag.
GCN Circular #11539
D. Malesani (DARK/NBI), D. Fugazza (INAF/Brera), S. Covino (INAF/Brera), L. Angelo Antonelli (INAF/Roma), A. Harutyunyan (INAF/TNG), G. Tessicini (INAF/TNG), G. Andreuzzi (INAF/TNG), report on behalf of a larger collaboration:
We observed the field of GRB 110106A (Mangano et al., GCN 11520) in the K band with the 3.6m TNG equipped with NICS. A total of 60 min integrations were obtained with a mean time Jan 7.07 UT (10.33 hr after the GRB).
We detect no sources within the refined X-ray position (Osborne et al., GCN 11526; see also http://www.swift.ac.uk/xrt_positions), down to a 3-sigma limiting magnitude K > 20.3. We clearly detect the z=0.093 galaxy just outside the error circle (Malesani et al., GCN 11524; Piranomonte et al., GCN 11530), with a magnitude K=14.90 +- 0.06 (calibration against 2MASS stars in the field).
GCN Circular #11542
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, A. Popov Ural State University, Kourovka
K.Ivanov, O.Chuvalaev, V.Poleschuk, E.Konstantinov, V.Lenok, O.Gres, S.Yazev, N.M.Budnev, Irkutsk State University
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 in Kislovodsk was pointed to the GRB110106A (Mangano et al., GCN Circ 1152) 17 sec s after notice time and 41 sec after GRB time at 2011-01-06 15:25:57.96 UT in two polarizations+filter R (Gorbovskoy et al., GCN Circ 11523).
We marginally see OT about 16.0+-0.5 mag in XRT error box on second set at 2011-01-06 15:26:19 (starting 69 s after trigger time with 10 sec exposition, Gorbovskoy et al., GCN Circ 11523).
```
The OT positon:
RA=  05 17 13.98
DEC= 64 10 23.5
```
the error +-4" and coincident with late OT TNG position (Malesani et al., GCN Circ 11524).
GRB trigger time: 15:25:16
```
Time UT             T-T_trigger    Exp         Filter         Mag


15:25:57               41           10           Cr           >16,1
15:26:19               63           10           R+P        16,0+-0.5
15:26:40               84           20           R+P          >16,6
15:27:11               115          20           R+P          >16,6
15:27:42               146          30           R+P          >17,0
15:28:23               187          40           R+P          >17,2
15:29:14               238          50           R+P          >17,4
15:30:15               299          60           R+P          >17,5
15:31:26               370          70           R+P          >17,7
15:32:47               451          90           R+P          >17,9
15:34:28               552         110           R+P          >18,0
15:36:29               673         130           R+P          >18,1
15:38:51               815         160           R+P          >18,3
15:41:42               986         180           R+P          >18,3
15:44:53              1177         180           R+P          >18,4
```
The more detailed data are available at http://observ.pereplet.ru/images/GRB110106A/grb.html
We see the galaxy near (~8" distance, in our prevous Circ 11523 we not include the binning CCD scale = 4"/pix) OT on later images with long exposition. The redshift z=0.093 (Piranomonte et al., GCN Circ 1130) is typical for short bursts.
The origin of the GRB110106A is no connected with massive star core collapse because long distance from center of the host galaxy (independently of the host galaxy type!). The origin of the GRB connected with the NS+NS or NS+BH merging (Lipunov et al.,1995, "Evolution of the Double Neutron Star Merging Rate and the Cosmological Origin of Gamma-Ray Burst Sources", Astrophysical Journal v.454, p.593.; Lipunov, 1997, Relativistic Binary Merging Rates, The Invited Review on Joint Discussion "High Energy Transients" on XXIIIrd General Assembly of IAU, Kioto, 1997, http://adsabs.harvard.edu/abs/1997astro.ph.11270L).
The message may be cited.
mailto: lipunov@sai.msu.ru
GCN Circular #11580
A. Zauderer (Harvard), D.A. Frail (NRAO), E. Berger (Harvard), and S.R. Kulkarni (Caltech) report:
We observed the position of the intermediate-duration GRB 110106A (GCN #11520) with the CARMA millimeter array starting on 2011 Jan. 16.827 UT (84 min after the burst) at a frequency of 92 GHz. A total of 32 minutes were spent integrating on source in good weather conditions (tau230 < 0.1). With baselines up to ~1 km, we obtain a beam size of 3.3'' x 0.9'' (natural weighting). We do not detect any sources within the revised XRT position (GCN#11526) to a 5-sigma upper limit of 4.1 mJy/beam. These observations are among the earliest millimeter wavelength afterglow searches at milliJansky noise levels.
We thank the CARMA staff for their support of these observations.
GCN Circular #11593
V. Rumyantsev, K. Antoniuk (CrAO), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration:
We observed the field of the Swift GRB 110106A (Mangano et al., GCN 11520) with AZT-11 telescope of CrAO starting on Jan. 06 (UT) 16:26. In the enhanced Swift-XRT position (Osborne al., GCN 11526) we do not detect optical afterglow candidate (Malesani et al., GCN 11524) up to R=21.9. We clearly detect the nearby galaxy outside the error circle (Malesani et al., GCN 11524, Piranomonte et al., GCN 11530, Gorbovskoy et al., GCN 11542). The photometry is based on the USNO B1.0 star 1541-0130790 (05:17:11.42 +64:10:11.0) assuming R=17.81. The finding chart can be found at http://grb.rssi.ru/GRB110106A/grb110106a_110106_R_azt11.png
```
T0+      Filter,   Exposure, mag.
(mid, d)              (s)

0.06398  R 20x180       >21.9
```
GCN Report 322.1
GCN_Report 322.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_322_1.pdf by V. Mangano at INAF IASF Pa titled: "Final Swift Observations of GRB 110106A"
1305.1620 from 9 May 13
E. S. Gorbovskoy et al.: The MASTER-II Network of Robotic Optical Telescopes. First Results
The main stages in the creation of the Russian segment of the MASTER network of robotic telescopes is described. This network is designed for studies of the prompt optical emission of gamma- ray bursts (GRBs; optical emission synchronous with the gamma-ray radiation) and surveys of the sky aimed at discovering uncataloged objects and photometric studies for various programs. The first results obtained by the network, during its construction and immediately after its completion in December 2010, are presented. Eighty-nine alert pointings at GRBs (in most cases, being the first ground telescopes to point at the GRBs) were made from September 2006 through July 2011. The MASTER network holds first place in the world in terms of the total number of first pointings, and currently more than half of first pointings at GRBs by ground telescopes are made by the MASTER network. Photometric light curves of GRB 091020, GRB 091127, GRB 100901A, GRB 100906A, GRB 10925A, GRB 110106A, GRB 110422A, and GRB 110530A are presented. It is especially important that prompt emission was ob- served for GRB 100901A and GRB 100906A, and thar GRB 091127, GRB 110422A, and GRB 110106A were observed from the first seconds in two polarizations. Very-wide-field cameras carried out synchronous observations of the prompt emission of GRB 081102, GRB 081130B, GRB 090305B, GRB 090320B, GRB 090328, and GRB 090424. Discoveries of Type Ia supernovae are ongoing (among them the brightest supernova in 2009): 2008gy, 2009nr, 2010V, and others. In all, photometry of 387 supernovae has been carried out, 43 of which were either discovered or first observed with MASTER telescopes; more than half of these are Type Ia supernovae. Photometric studies of the open clusters NGC 7129 and NGC 7142 have been conducted, leading to the discovery of 38 variable stars.

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