Gamma-ray Burst 120118B

(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:     Wed 18 Jan 12 17:00:40 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     512003,   Seg_Num: 0
GRB_RA:          124.866d {+08h 19m 28s} (J2000),
                 125.014d {+08h 20m 03s} (current),
                 124.254d {+08h 17m 01s} (1950)
GRB_DEC:          -7.182d {-07d 10' 53"} (J2000),
                  -7.220d {-07d 13' 11"} (current),
                  -7.024d {-07d 01' 25"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       3489 [cnts]    Image_Peak=128 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   142     E_range: 15-50 keV
BKG_INTEN:       23536 [cnts]
BKG_TIME:        61208.20 SOD {17:00:08.20} UT
BKG_DUR:         8 [sec]
GRB_DATE:        15944 TJD;    18 DOY;   12/01/18
GRB_TIME:        61221.19 SOD {17:00:21.19} UT
GRB_PHI:          31.78 [deg]
GRB_THETA:        35.57 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     9.32 [sigma]
IMAGE_SIGNIF:    7.09 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +1  -3  +0  +0 +88  +0 
SUN_POSTN:       300.09d {+20h 00m 22s}  -20.56d {-20d 33' 35"}
SUN_DIST:        151.80 [deg]   Sun_angle= 11.7 [hr] (West of Sun)
MOON_POSTN:      236.05d {+15h 44m 12s}  -21.07d {-21d 04' 14"}
MOON_DIST:       106.69 [deg]
MOON_ILLUM:      25 [%]
GAL_COORDS:      229.91, 15.89 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      129.13,-26.01 [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 = 99.79,-19.13 [deg].

red DSS finding chart ps-file

GCN NOTICE

 
TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Wed 18 Jan 12 17:00:52 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      45
TRIGGER_NUM:     348598824
GRB_RA:          115.250d {+07h 41m 00s} (J2000),
                 115.376d {+07h 41m 30s} (current),
                 114.726d {+07h 38m 54s} (1950)
GRB_DEC:         -24.883d {-24d 52' 59"} (J2000),
                 -24.912d {-24d 54' 42"} (current),
                 -24.766d {-24d 45' 55"} (1950)
GRB_ERROR:       29.38 [deg radius, statistical plus systematic]
GRB_INTEN:       63 [cnts/sec] 
DATA_SIGNIF:     5.00 [sigma]  
INTEG_TIME:      2.048 [sec]   
GRB_DATE:        15944 TJD;    18 DOY;   12/01/18
GRB_TIME:        61222.94 SOD {17:00:22.94} UT
GRB_PHI:         235.00 [deg]  
GRB_THETA:        40.00 [deg]
DATA_TIME_SCALE: 2.0480 [sec]  
HARD_RATIO:      2.15
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      75%  GRB
2nd_MOST_LIKELY:  22%  Generic SGR
SUN_POSTN:       300.09d {+20h 00m 22s}  -20.56d {-20d 33' 35"}
SUN_DIST:        134.30 [deg]   Sun_angle= -11.7 [hr] (East of Sun)
MOON_POSTN:      236.05d {+15h 44m 13s}  -21.07d {-21d 04' 15"}
MOON_DIST:       106.28 [deg]
MOON_ILLUM:      25 [%]
GAL_COORDS:      240.53, -1.07 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      123.47,-45.43 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.
COMMENTS:        
COMMENTS:        NOTE: This GBM event is temporally(1.0<100sec) coincident with
the SWIFT_BAT event (trignum=512003).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 18 Jan 12 17:02:20 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     512003,   Seg_Num: 0
POINT_RA:        124.853d {+08h 19m 25s} (J2000)
POINT_DEC:        -7.154d {-07d 09' 12"} (J2000)
IMG_START_DATE:  15944 TJD;    18 DOY;   12/01/18
IMG_START_TIME:  61333.29 SOD {17:02:13.29} UT,   112.1 [sec] since BAT Trigger Time
COUNTS:          18    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:     Wed 18 Jan 12 17:03:50 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     512003,   Seg_Num: 0
GRB_RA:          124.866d {+08h 19m 28s} (J2000),
                 125.014d {+08h 20m 03s} (current),
                 124.254d {+08h 17m 01s} (1950)
GRB_DEC:          -7.182d {-07d 10' 53"} (J2000),
                  -7.220d {-07d 13' 11"} (current),
                  -7.024d {-07d 01' 25"} (1950)
GRB_DATE:        15944 TJD;    18 DOY;   12/01/18
GRB_TIME:        61221.19 SOD {17:00:21.19} UT
TRIGGER_INDEX:   142
GRB_PHI:          31.78 [deg]
GRB_THETA:        35.57 [deg]
DELTA_TIME:      -18.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     9.32 [sigma]
IMAGE_SIGNIF:    7.09 [sigma]
LC_URL:          sw00512003000msb.lc
SUN_POSTN:       300.10d {+20h 00m 23s}  -20.56d {-20d 33' 33"}
SUN_DIST:        151.80 [deg]   Sun_angle= 11.7 [hr] (West of Sun)
MOON_POSTN:      236.08d {+15h 44m 20s}  -21.08d {-21d 04' 30"}
MOON_DIST:       106.72 [deg]
MOON_ILLUM:      25 [%]
GAL_COORDS:      229.91, 15.89 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      129.13,-26.01 [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 = 99.79,-19.13 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 18 Jan 12 17:05:11 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     512003,   Seg_Num: 0
POINT_RA:        124.853d {+08h 19m 25s} (J2000)
POINT_DEC:        -7.154d {-07d 09' 12"} (J2000)
POINT_ROLL:      170.482d
IMG_START_DATE:  15944 TJD;    18 DOY;   12/01/18
IMG_START_TIME:  61336.85 SOD {17:02:16.85} UT,   115.7 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.241
N_STARS:         83
X_OFFSET:        645 [pixels]
Y_OFFSET:        404 [pixels]
X_MAX:           1604 [pixels]
Y_MAX:           1363 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00512003000msufc0115.fits
SUN_POSTN:       300.10d {+20h 00m 23s}  -20.56d {-20d 33' 33"}
SUN_DIST:        151.83 [deg]   Sun_angle= 11.7 [hr] (West of Sun)
MOON_POSTN:      236.10d {+15h 44m 24s}  -21.08d {-21d 04' 36"}
MOON_DIST:       106.75 [deg]
MOON_ILLUM:      25 [%]
GAL_COORDS:      229.87, 15.90 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      129.11,-25.99 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 18 Jan 12 17:05:41 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     512003,   Seg_Num: 0
POINT_RA:        124.853d {+08h 19m 25s} (J2000)
POINT_DEC:        -7.154d {-07d 09' 12"} (J2000)
POINT_ROLL:      170.482d
IMG_START_DATE:  15944 TJD;    18 DOY;   12/01/18
IMG_START_TIME:  61336.85 SOD {17:02:16.85} UT,   115.7 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.241
N_STARS:         83
X_OFFSET:        645 [pixels]
Y_OFFSET:        404 [pixels]
X_MAX:           1604 [pixels]
Y_MAX:           1363 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00512003000msufc0115.fits
SUN_POSTN:       300.10d {+20h 00m 23s}  -20.56d {-20d 33' 32"}
SUN_DIST:        151.83 [deg]   Sun_angle= 11.7 [hr] (West of Sun)
MOON_POSTN:      236.10d {+15h 44m 25s}  -21.08d {-21d 04' 38"}
MOON_DIST:       106.76 [deg]
MOON_ILLUM:      25 [%]
GAL_COORDS:      229.87, 15.90 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      129.11,-25.99 [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:     Wed 18 Jan 12 17:06:39 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     512003,   Seg_Num: 0
POINT_RA:        124.853d {+08h 19m 25s} (J2000)
POINT_DEC:        -7.154d {-07d 09' 12"} (J2000)
ROLL:            170.482d
IMG_START_DATE:  15944 TJD;    18 DOY;   12/01/18
IMG_START_TIME:  61336.85 SOD {17:02:16.85} UT,   115.7 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     348598944
X_OFFSET:        964 [pixels]
Y_OFFSET:        723 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1124
Y_GRB_POS:       883
BINNING_INDEX:   1
IM_URL:          sw00512003000msuni0123.fits
SUN_POSTN:       300.10d {+20h 00m 23s}  -20.56d {-20d 33' 32"}
SUN_DIST:        151.83 [deg]   Sun_angle= 11.7 [hr] (West of Sun)
MOON_POSTN:      236.11d {+15h 44m 27s}  -21.08d {-21d 04' 43"}
MOON_DIST:       106.77 [deg]
MOON_ILLUM:      25 [%]
GAL_COORDS:      229.87, 15.90 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      129.11,-25.99 [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:     Wed 18 Jan 12 17:07:01 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     512003,   Seg_Num: 0
POINT_RA:        124.853d {+08h 19m 25s} (J2000)
POINT_DEC:        -7.154d {-07d 09' 12"} (J2000)
ROLL:            170.482d
IMG_START_DATE:  15944 TJD;    18 DOY;   12/01/18
IMG_START_TIME:  61336.85 SOD {17:02:16.85} UT,   115.7 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     348598944
X_OFFSET:        964 [pixels]
Y_OFFSET:        723 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1124
Y_GRB_POS:       883
BINNING_INDEX:   1
IM_URL:          sw00512003000msuni0123.fits
SUN_POSTN:       300.10d {+20h 00m 23s}  -20.56d {-20d 33' 32"}
SUN_DIST:        151.83 [deg]   Sun_angle= 11.7 [hr] (West of Sun)
MOON_POSTN:      236.12d {+15h 44m 28s}  -21.08d {-21d 04' 45"}
MOON_DIST:       106.77 [deg]
MOON_ILLUM:      25 [%]
GAL_COORDS:      229.87, 15.90 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      129.11,-25.99 [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 NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 18 Jan 12 17:11:56 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     512003,   Seg_Num: 0
POINT_RA:        124.854d {+08h 19m 25s} (J2000)
POINT_DEC:        -7.152d {-07d 09' 08"} (J2000)
POINT_ROLL:      170.479d
IMG_START_DATE:  15944 TJD;    18 DOY;   12/01/18
IMG_START_TIME:  61548.77 SOD {17:05:48.77} UT,   327.6 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.636
N_STARS:         144
X_OFFSET:        405 [pixels]
Y_OFFSET:        164 [pixels]
X_MAX:           1844 [pixels]
Y_MAX:           1603 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00512003000msufc0327.fits
SUN_POSTN:       300.10d {+20h 00m 24s}  -20.56d {-20d 33' 29"}
SUN_DIST:        151.84 [deg]   Sun_angle= 11.7 [hr] (West of Sun)
MOON_POSTN:      236.17d {+15h 44m 41s}  -21.09d {-21d 05' 08"}
MOON_DIST:       106.81 [deg]
MOON_ILLUM:      25 [%]
GAL_COORDS:      229.87, 15.90 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      129.11,-25.98 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 18 Jan 12 17:12:13 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     512003,   Seg_Num: 0
POINT_RA:        124.854d {+08h 19m 25s} (J2000)
POINT_DEC:        -7.152d {-07d 09' 08"} (J2000)
POINT_ROLL:      170.479d
IMG_START_DATE:  15944 TJD;    18 DOY;   12/01/18
IMG_START_TIME:  61548.77 SOD {17:05:48.77} UT,   327.6 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.636
N_STARS:         144
X_OFFSET:        405 [pixels]
Y_OFFSET:        164 [pixels]
X_MAX:           1844 [pixels]
Y_MAX:           1603 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00512003000msufc0327.fits
SUN_POSTN:       300.10d {+20h 00m 24s}  -20.56d {-20d 33' 29"}
SUN_DIST:        151.84 [deg]   Sun_angle= 11.7 [hr] (West of Sun)
MOON_POSTN:      236.17d {+15h 44m 41s}  -21.09d {-21d 05' 10"}
MOON_DIST:       106.82 [deg]
MOON_ILLUM:      25 [%]
GAL_COORDS:      229.87, 15.90 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      129.11,-25.98 [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:     Wed 18 Jan 12 17:13:28 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     512003,   Seg_Num: 0
POINT_RA:        124.854d {+08h 19m 25s} (J2000)
POINT_DEC:        -7.152d {-07d 09' 08"} (J2000)
ROLL:            170.479d
IMG_START_DATE:  15944 TJD;    18 DOY;   12/01/18
IMG_START_TIME:  61548.77 SOD {17:05:48.77} UT,   327.6 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     348599156
X_OFFSET:        964 [pixels]
Y_OFFSET:        723 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1124
Y_GRB_POS:       883
BINNING_INDEX:   1
IM_URL:          sw00512003000msuni0335.fits
SUN_POSTN:       300.10d {+20h 00m 25s}  -20.56d {-20d 33' 29"}
SUN_DIST:        151.84 [deg]   Sun_angle= 11.7 [hr] (West of Sun)
MOON_POSTN:      236.19d {+15h 44m 45s}  -21.09d {-21d 05' 15"}
MOON_DIST:       106.83 [deg]
MOON_ILLUM:      25 [%]
GAL_COORDS:      229.87, 15.90 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      129.11,-25.98 [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:     Wed 18 Jan 12 17:13:46 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     512003,   Seg_Num: 0
POINT_RA:        124.854d {+08h 19m 25s} (J2000)
POINT_DEC:        -7.152d {-07d 09' 08"} (J2000)
ROLL:            170.479d
IMG_START_DATE:  15944 TJD;    18 DOY;   12/01/18
IMG_START_TIME:  61548.77 SOD {17:05:48.77} UT,   327.6 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     348599156
X_OFFSET:        964 [pixels]
Y_OFFSET:        723 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1124
Y_GRB_POS:       883
BINNING_INDEX:   1
IM_URL:          sw00512003000msuni0335.fits
SUN_POSTN:       300.10d {+20h 00m 25s}  -20.56d {-20d 33' 28"}
SUN_DIST:        151.84 [deg]   Sun_angle= 11.7 [hr] (West of Sun)
MOON_POSTN:      236.19d {+15h 44m 45s}  -21.09d {-21d 05' 17"}
MOON_DIST:       106.83 [deg]
MOON_ILLUM:      25 [%]
GAL_COORDS:      229.87, 15.90 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      129.11,-25.98 [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 #12852
O. M. Littlejohns (U Leicester), S. D. Barthelmy (GSFC), A. P. Beardmore (U Leicester), S. Campana (INAF-OAB), M. M. Chester (PSU), C. Guidorzi (U Ferrara), S. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU), N. P. M. Kuin (UCL-MSSL), A. Y. Lien (NASA/GSFC/ORAU), V. Mangano (INAF-IASFPA), F. E. Marshall (NASA/GSFC), A. Melandri (INAF-OAB), P. T. O'Brien (U Leicester), K. L. Page (U Leicester), T. Sakamoto (NASA/UMBC), C. J. Saxton (UCL-MSSL), B. Sbarufatti (INAF-OAB/PSU), M. H. Siegel (PSU), R. L. C. Starling (U Leicester), C. A. Swenson (PSU), T. N. Ukwatta (MSU) and B.-B. Zhang (PSU) report on behalf of the Swift Team:
At 17:00:21 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 120118B (trigger=512003). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 124.866, -7.182, which is
```
   RA(J2000)  =  08h 19m 28s
   Dec(J2000) = -07d 10' 53"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows single peak with a duration of about 30 sec. The peak count rate was ~1700 counts/sec (15-350 keV), at ~6 sec after the trigger.
The XRT began observing the field at 17:02:13.2 UT, 112.1 seconds after the BAT trigger. No source was detected in the 2.5-s promptly available image. We are waiting for the full dataset to detect and localise the XRT counterpart.
UVOT took a finding chart exposure of 150 seconds with the White filter starting 115 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 25% of the BAT 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 0.15.
Burst Advocate for this burst is O. M. Littlejohns (oml2 AT star.le.ac.uk). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/too.html.)

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 18 Jan 12 17:17:39 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     512003,   Seg_Num: 0
POINT_RA:        124.854d {+08h 19m 25s} (J2000)
POINT_DEC:        -7.153d {-07d 09' 09"} (J2000)
POINT_ROLL:      170.479d
IMG_START_DATE:  15944 TJD;    18 DOY;   12/01/18
IMG_START_TIME:  62080.65 SOD {17:14:40.65} UT,   859.5 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.194
N_STARS:         190
X_OFFSET:        405 [pixels]
Y_OFFSET:        164 [pixels]
X_MAX:           1844 [pixels]
Y_MAX:           1603 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00512003000msufc0859.fits
SUN_POSTN:       300.11d {+20h 00m 25s}  -20.56d {-20d 33' 26"}
SUN_DIST:        151.84 [deg]   Sun_angle= 11.7 [hr] (West of Sun)
MOON_POSTN:      236.23d {+15h 44m 55s}  -21.09d {-21d 05' 35"}
MOON_DIST:       106.86 [deg]
MOON_ILLUM:      25 [%]
GAL_COORDS:      229.87, 15.90 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      129.11,-25.98 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 18 Jan 12 17:18:01 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     512003,   Seg_Num: 0
POINT_RA:        124.854d {+08h 19m 25s} (J2000)
POINT_DEC:        -7.153d {-07d 09' 09"} (J2000)
POINT_ROLL:      170.479d
IMG_START_DATE:  15944 TJD;    18 DOY;   12/01/18
IMG_START_TIME:  62080.65 SOD {17:14:40.65} UT,   859.5 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.194
N_STARS:         190
X_OFFSET:        405 [pixels]
Y_OFFSET:        164 [pixels]
X_MAX:           1844 [pixels]
Y_MAX:           1603 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00512003000msufc0859.fits
SUN_POSTN:       300.11d {+20h 00m 25s}  -20.56d {-20d 33' 26"}
SUN_DIST:        151.84 [deg]   Sun_angle= 11.7 [hr] (West of Sun)
MOON_POSTN:      236.23d {+15h 44m 56s}  -21.09d {-21d 05' 37"}
MOON_DIST:       106.87 [deg]
MOON_ILLUM:      25 [%]
GAL_COORDS:      229.87, 15.90 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      129.11,-25.98 [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:     Wed 18 Jan 12 17:19:06 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     512003,   Seg_Num: 0
POINT_RA:        124.854d {+08h 19m 25s} (J2000)
POINT_DEC:        -7.153d {-07d 09' 09"} (J2000)
ROLL:            170.479d
IMG_START_DATE:  15944 TJD;    18 DOY;   12/01/18
IMG_START_TIME:  62080.65 SOD {17:14:40.65} UT,   859.5 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     348599688
X_OFFSET:        964 [pixels]
Y_OFFSET:        723 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1124
Y_GRB_POS:       883
BINNING_INDEX:   1
IM_URL:          sw00512003000msuni0867.fits
SUN_POSTN:       300.11d {+20h 00m 26s}  -20.56d {-20d 33' 26"}
SUN_DIST:        151.84 [deg]   Sun_angle= 11.7 [hr] (West of Sun)
MOON_POSTN:      236.24d {+15h 44m 59s}  -21.10d {-21d 05' 42"}
MOON_DIST:       106.88 [deg]
MOON_ILLUM:      25 [%]
GAL_COORDS:      229.87, 15.90 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      129.11,-25.98 [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:     Wed 18 Jan 12 17:19:28 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     512003,   Seg_Num: 0
POINT_RA:        124.854d {+08h 19m 25s} (J2000)
POINT_DEC:        -7.153d {-07d 09' 09"} (J2000)
ROLL:            170.479d
IMG_START_DATE:  15944 TJD;    18 DOY;   12/01/18
IMG_START_TIME:  62080.65 SOD {17:14:40.65} UT,   859.5 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     348599688
X_OFFSET:        964 [pixels]
Y_OFFSET:        723 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1124
Y_GRB_POS:       883
BINNING_INDEX:   1
IM_URL:          sw00512003000msuni0867.fits
SUN_POSTN:       300.11d {+20h 00m 26s}  -20.56d {-20d 33' 25"}
SUN_DIST:        151.84 [deg]   Sun_angle= 11.7 [hr] (West of Sun)
MOON_POSTN:      236.25d {+15h 45m 00s}  -21.10d {-21d 05' 44"}
MOON_DIST:       106.88 [deg]
MOON_ILLUM:      25 [%]
GAL_COORDS:      229.87, 15.90 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      129.11,-25.98 [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 #12853
O.Gres, O.Chuvalaev,K.Ivanov, V.A.Poleshchuk, S.Yazev, N.M.Budnev Irkutsk State University
V. Lipunov, E. Gorbovskoy, V.Kornilov, D.Kuvshinov, A.Belinski, N.Tyurina, N.Shatskiy, P.Balanutsa, V.V.Chazov, A.Kuznetsov, D.Zimnukhov, M. Kornilov, A.Kuznetsov, D.Zimnukhov, M. Kornilov, A.Sankovich, S. Shurpakov Moscow State University, Sternberg Astronomical Institute
V.Krushinski, I.Zalozhnich, A. Popov Ural State University, Kourovka
E. Sinykov, V.Yurkov, Yu.Sergienko, D.Varda, Blagoveschensk Educational State University, Blagoveschensk
A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik Kislovodsk Solar Station of the Pulkovo Observatory
MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in Tunka was pointed to the GRB120118A (Littlejohns et al., GCN Circ 12852) 1417 s after notice time and 1437 sec after GRB time at 2012-01-18 17:24:53 UT in two polarizations. On our first (120s exposure) set we haven`t found optical transient within SWIFT error-box . The delay is due to weather conditions. The 5-sigma upper limit has been about 17.0 mag
This circular was generated automatically.
The message may be cited.
GCN Circular #12854
O. M. Littlejohns, K. Page and P. A. Evans (U. Leicester) report on behalf of the Swift-XRT team:
Using promptly downlinked data we find a bright, fading, uncatalogued X-ray source with an enhanced position: RA, Dec = 124.8713, -7.1848 (degrees) which is equivalent to:
```
RA (J2000.0) = 08h 19m 29.12s
DEC (J2000.0) = -07d 11' 05.2"
```
with an uncertainty of 2.2 arcsec (radius, 90% containment).
This location is 21.4 arcseconds from the BAT onboard position, inside the BAT error circle.
This message may be cited.
GCN Circular #12856
A. Melandri (INAF-OAB), C. G. Mundell (Liverpool JMU) and C. Guidorzi (U. Ferrara) report on behalf of a large collaboration:
The 2-m Faulkes Telescope South responded automatically to Swift GRB 120118B (Littlejohns et al. GCN Circ. 12852) with observations beginning at 17:03 UT 2012 January 18th (~2.8 min after the BAT trigger time).
Within the XRT error circle (Littlejohns et al. GCN Circ. 12854) we do not find any source in the R and i' filters down to the following (3sigma) limiting magnitudes:
```
Mid time from  Total Exp   Filter    Magnitude
trigger (min)    (s)
-------------------------------------------------
   34.9            720         R    > 18.9
   39.2            700         i'     > 19.1
-------------------------------------------------
```
Magnitudes have been calibrated from R2 and I nominal values of nearby USNOB1.0 stars.
GCN Circular #12857
J.P. Osborne, A.P. Beardmore, P.A. Evans and M.R. Goad (U. Leicester) report on behalf of the Swift-XRT team.
Using 1411 s of XRT Photon Counting mode data and 2 UVOT images for GRB 120118B, 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 = 124.87106, -7.18474 which is equivalent to:
```
RA (J2000): 08h 19m 29.05s
Dec (J2000): -07d 11' 05.1"
```
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 #12858
Paul Vreeswijk (U. Iceland), Tapio Pursimo (NOT) and P=E1ll Jakobsson (U. Iceland), report on behalf of a larger collaboration:
Using ALFOSC on the Nordic Optical Telescope (NOT) we have obtained Sloan r'- (3 x 600 s) and z'-band (6 x 300 s) imaging of the field of the Swift GRB 120118B (Littlejohns et al., GCN 12852), starting on 2012 January 18 at 22:48 UT, just under 6 hours after the burst. The observations were performed in non-optimal seeing conditions (~3.5").
We do not detect any object within the XRT error circle (Littlejohns et al., GCN 12854), down to approximate limiting magnitudes of r'>21.2 and z'>19.5 (calibrated against the SDSS catalog).
GCN Circular #12862
M. M. Chester (PSU) and O. M. Littlejohns (U Leicester) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 120118B 116 s after the BAT trigger (Littlejohns et al., GCN Circ. 12852). No optical afterglow consistent with the enhanced XRT position (Osborne et al., GCN Circ. 12857) is detected in the initial UVOT data. Preliminary 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first finding chart (FC) exposures and subsequent exposures are:
```
Filter         T_start(s)   T_stop(s)      Exp(s)         Mag

white_FC           116          265          147         >20.9
u_FC               328          577          246         >19.9
white              116         1528          392         >21.6
v                  657         1574          113         >19.1
b                  583         1504           97         >20.5
u                  328         1479          324         >20.2
w1                 708         1454           78         >19.0
m2                 682         1430           78         >19.9
w2                 633         1554          117         >19.8
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.15 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #12868
GRB 120118B : Lulin Optical limit
H.Y. Hsiao, Y. Urata (NCU), K.Y. Huang (ASIAA) on behalf the EAFON cooperation:
The Lulin 1-m telescope at Taiwan started optical observations on GRB 120118B at 1.8 hours after the BAT trigger (Littlejohns et al. GCN 12852). No optical counterpart was found at the Swift-XRT position (Osborne et al, GCN 12857). Our stacked images indicate 3-sigma limiting magnitudes of g'~21.9, r'~ 21.4 and i'~ 20.9. The calibrations were against two nearby sdss stars.
This message can be cited.
GCN Circular #12869
O. M. Littlejohns (U Leicester) reports on behalf of the Swift-XRT team:
We have analysed 8.6 ks of XRT data for GRB 120118B (Littlejohns et al. GCN Circ. 12852), from 96 s to 33.9 ks after the BAT trigger. The data comprise 19 s in Windowed Timing (WT) mode (the first 9 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 Osborne et al. (GCN. Circ 12857).
The light curve can be modelled with a series of power-law decays. The initial decay index is alpha=3.9 (+0.5, -0.4). At T+312 s the decay flattens to an alpha of -0.25 (+0.24, -0.21) before breaking again at T+2735 s to a final decay with index alpha=0.99 (+/-0.15).
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 2.22 (+0.20, -0.18). The best-fitting absorption column is 2.7 (+/-0.6) x 10^21 cm^-2, in excess of the Galactic value of 6.9 x 10^20 cm^-2 (Kalberla et al. 2005). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.6 x 10^-11 (6.4 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     2.7 (+/-0.6) x 10^21 cm^-2
Galactic foreground: 6.9 x 10^20 cm^-2
Excess significance: 6.0 sigma
Photon index:	     2.22 (+0.20, -0.18)
```
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00512003.
This circular is an official product of the Swift-XRT team.
GCN Circular #12870
P. D'Avanzo (INAF-OAB) and E. Palazzi (INAF/IASF Bo) report on behalf of the CIBO collaboration:
We observed the field of GRB 120118B (Littlejohns et al., GCN 12852) with the 3.6m TNG telescope located in the Canary Islands. We secured 40 min H-band and 40 min J-band imaging with the NICS instrument, carried out at a mean t-t0=9.9 hr and t-t0=10.9 hr, respectively.
Within the UVOT-enhanced XRT error circle (Osborne et al., GCN 12857), we detect no source down to the limiting magnitudes H > 20.3 and J > 20.5 (Vega, calibrated against the 2MASS catalog).
We note however, a hint for the presence of a faint, low-significance object in the H-band image, at the following position (J2000):
```
RA: 08:19:29.02
Dec: -07:11:05.1
```
(+/- 0.3"), consistent with the UVOT-enhanced XRT position. At present we cannot asses if the source is real or due to a background fluctuation.
We acknoledge the TNG staff for their support, in particular Avet Harutyunyan and Gianni Tessicini.
GCN Circular #12873
T. Sakamoto (GSFC/UMBC), 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), O. M. Littlejohns (U Leicester), C. B. Markwardt (GSFC), D. M. Palmer (LANL), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU) (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 120118B (trigger #512003) (Littlejohns, et al., GCN Circ. 12852). The BAT ground-calculated position is RA, Dec = 124.862, -7.178 deg which is
```
     RA(J2000)  =  08h 19m 26.9s
     Dec(J2000) = -07d 10' 39.5"
```
with an uncertainty of 1.3 arcmin, (radius, sys+stat, 90% containment). The partial coding was 40%.
The mask-weighted light curve shows a single smooth FRED peak lasting from T-5 sec to T+25 sec. T90 (15-350 keV) is 23.26 +- 4.02 sec (estimated error including systematics).
The time-averaged spectrum from T-1.92 to T+30.51 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 2.08 +- 0.11. The fluence in the 15-150 keV band is 1.8 +- 0.1 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+6.69 sec in the 15-150 keV band is 2.2 +- 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/512003/BA/
GCN Circular #12879
I. Bikmaev, A.Galeev , N. Sakhibullin (Kazan University), R. Burenin, M. Pavlinsky, R. Sunyaev (IKI), I. Khamitov, Z. Eker (TUG), U. Kiziloglu (METU), E. Gogus (Sabanci Uni.)
report:
The field of GRB 120118B (Littlejohns et al., GCN 12852) was observed with Russian-Turkish 1.5-m telescope (RTT150, Bakirlitepe, TUBITAK National Observatory, Turkey) in January 18/19, 2012, during UT 20:29 -- 01:01, i.e. starting approximately 3.5 hours after the burst. A serie of 3 exposures by 900 sec and 10 exposures by 600 sec each in Rc filter was obtained at moderate seeing conditions of 1.8-2.3 arcsec.
We found no optical source within the 1.8" enhanced XRT error circle (Osborne et al., GCN 12857) in our combined image at a limiting magnitude of Rc ~ 23.2 mag.
GCN Circular #12900
A. Volnova (SAI MSU), E. Litvinenko (UBAI), I. Molotov (KIAM), A. Pozanenko (IKI) on behalf of larger GRB follow up collaboration report:
We observed the field of the Swift GRB 120118B (Littlejohns et al., GCNs 12852, 12854) with ORI-40 telescope of Kitab ISON observatory on Jan. 18 between (UT) 17:39:55 and 18:10:51. We obtained several unfiltered images with exposure of 60 seconds. On the stacked image we do not detect a source reported by D'Avanzo et al. (GCN 12870). The photometry is based on nearby reference stars of USNO-B1.0 (R2 magnitudes):
```
 Tstart UT,   T0+,        Filter, Exposure, OT,   UL (3 sigma)
                 (mid, d)            (s)

 17:39:55     0.03127   none   26x60      n/d   19.5
```
GCN Report 373.1
GCN_Report 373.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_373_1.pdf by O.M. Littlejohns at U. Leicester titled: "Final Swift Observations of GRB 120118B"
GCN Circular #14225
Daniele Malesani, Thomas Kruehler (DARK/NBI), Daniel Perley (Caltech),=20 Johan P. U. Fynbo, Dong Xu, Bo Milvang-Jensen (DARK/NBI), Paolo Goldoni=20 (APC, CEA/Irfu), Steve Schulze (PUC and MCSS), report on behalf of the=20 X-shooter GTO GRB collaboration:
We observed the field of GRB 120118B (Littlejohns et al., GCN 12852)=20 with the Keck I telescope located on Mauna Kea. Observations were=20 carried out on 2013 Feb 10 (389 days after the GRB), using the LRIS=20 instrument, simultaneously in the g and I bands, for a total exposure=20 time of 750 and 720 s, respectively. Consistent with the latest XRT=20 position (Osborne et al. GCN 12857; see also=20 http://www.swift.ac.uk/xrt_positions/), we detect a bright, slightly=20 extended object (I = 23.8, Vega), which we consider to be the GRB host galaxy. Its coordinates are (J2000):
```
RA =3D 08:19:29.047
Dec =3D -07:11:05.14
```
This position is consistent with that of the tentative near-infrared counterpart reported by D'Avanzo & Palazzi (GCN 12870).
A spectrum of this source was taken on 2013 Feb 13 with the ESO VLT=20 equipped with the X-shooter spectrograph, covering the wavelength range=20 3000-20500 AA. The seeing was 0.6". In the NIR arm, we detect several=20 emission lines, interpreted as [O III] (5007), [Ne III] (3869), and=20 hints for [O III] (4959) and [O II] (3727) at a common redshift z = 2.943. The weakness/lack of other prominent lines usually seen in GRB=20 host spectra is readily explained by their location in non-favorable=20 parts of the spectrum. In the UVB arm, the host continuum is detected=20 down to ~4750 AA, which corresponds to the onset of the Lyman alpha=20 forest at z = 2.943.
At z = 2.94 the host is a fairly luminous galaxy at 2000 =C5 rest-frame= ,=20 roughly 0.5 mag brighter than L* at that redshift (e.g. Gabasch et al.=20 2004, A&A, 421, 41). The properties of this object are akin to those of=20 Lyman-break galaxies.
We acknowledge excellent support from the observing staff at Mauna Kea and Paranal, in particular Cedric Ledoux and Andrea Mehner.

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Jochen Greiner, last update: 17-Feb-2013 [Disclaimer]