Gamma-ray Burst 121201A

(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:     Sat 01 Dec 12 12:27:02 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     540178,   Seg_Num: 0
GRB_RA:           13.488d {+00h 53m 57s} (J2000),
                  13.638d {+00h 54m 33s} (current),
                  12.907d {+00h 51m 38s} (1950)
GRB_DEC:         -42.952d {-42d 57' 06"} (J2000),
                 -42.882d {-42d 52' 55"} (current),
                 -43.223d {-43d 13' 22"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=1651 [image_cnts]
TRIGGER_DUR:     64.000 [sec] 
TRIGGER_INDEX:   20000     E_range: 15-50 keV
BKG_INTEN:       0 [cnts]
BKG_TIME:        0.00 SOD {00:00:00.00} UT
BKG_DUR:         0 [sec]
GRB_DATE:        16262 TJD;   336 DOY;   12/12/01
GRB_TIME:        44742.06 SOD {12:25:42.06} UT
GRB_PHI:          -8.30 [deg]
GRB_THETA:         4.25 [deg]
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    9.28 [sigma]
MERIT_PARAMS:     +1  +0  +0  +6  +1  +0  +0  +0 +14  +0 
SUN_POSTN:       248.06d {+16h 32m 15s}  -21.91d {-21d 54' 20"}
SUN_DIST:         98.14 [deg]   Sun_angle= -8.4 [hr] (East of Sun)
MOON_POSTN:      101.90d {+06h 47m 37s}  +19.23d {+19d 13' 39"}
MOON_DIST:       101.72 [deg]
MOON_ILLUM:      93 [%]
GAL_COORDS:      301.25,-74.17 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      350.87,-43.87 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This is an image trigger.  (The RATE_SIGNIF & BKG_{INTEN, TIME, DUR} are undefined.)  
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 = 137.63,-18.94 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 01 Dec 12 12:27:47 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     540178,   Seg_Num: 0
POINT_RA:         13.488d {+00h 53m 57s} (J2000)
POINT_DEC:       -42.956d {-42d 57' 20"} (J2000)
IMG_START_DATE:  16262 TJD;   336 DOY;   12/12/01
IMG_START_TIME:  44857.13 SOD {12:27:37.13} UT,   115.1 [sec] since BAT Trigger Time
COUNTS:          10    Min_needed= 20
STD_DEV:         0.00   Max_StdDev_for_Good=28.44 [arcsec]
PH2_ITER:        2    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:     Sat 01 Dec 12 12:29:44 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     540178,   Seg_Num: 0
GRB_RA:           13.488d {+00h 53m 57s} (J2000),
                  13.638d {+00h 54m 33s} (current),
                  12.907d {+00h 51m 38s} (1950)
GRB_DEC:         -42.952d {-42d 57' 06"} (J2000),
                 -42.882d {-42d 52' 55"} (current),
                 -43.223d {-43d 13' 22"} (1950)
GRB_DATE:        16262 TJD;   336 DOY;   12/12/01
GRB_TIME:        44742.06 SOD {12:25:42.06} UT
TRIGGER_INDEX:   20000
GRB_PHI:          -8.30 [deg]
GRB_THETA:         4.25 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     64.000 [sec] 
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    9.28 [sigma]
LC_URL:          sw00540178000msb.lc
SUN_POSTN:       248.07d {+16h 32m 16s}  -21.91d {-21d 54' 22"}
SUN_DIST:         98.14 [deg]   Sun_angle= -8.4 [hr] (East of Sun)
MOON_POSTN:      101.93d {+06h 47m 42s}  +19.22d {+19d 13' 27"}
MOON_DIST:       101.74 [deg]
MOON_ILLUM:      93 [%]
GAL_COORDS:      301.25,-74.17 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      350.87,-43.87 [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 an image 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 = 137.63,-18.94 [deg].  
COMMENTS:        The 2nd packet (of 3) was missing in the lightcurve data stream.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 01 Dec 12 12:30:37 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     540178,   Seg_Num: 0
POINT_RA:         13.488d {+00h 53m 57s} (J2000)
POINT_DEC:       -42.956d {-42d 57' 20"} (J2000)
POINT_ROLL:      229.771d
IMG_START_DATE:  16262 TJD;   336 DOY;   12/12/01
IMG_START_TIME:  44861.83 SOD {12:27:41.83} UT,   119.8 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.732
N_STARS:         76
X_OFFSET:        477 [pixels]
Y_OFFSET:        586 [pixels]
X_MAX:           1436 [pixels]
Y_MAX:           1545 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00540178000msufc0119.fits
SUN_POSTN:       248.07d {+16h 32m 16s}  -21.91d {-21d 54' 22"}
SUN_DIST:         98.14 [deg]   Sun_angle= -8.4 [hr] (East of Sun)
MOON_POSTN:      101.93d {+06h 47m 44s}  +19.22d {+19d 13' 23"}
MOON_DIST:       101.74 [deg]
MOON_ILLUM:      93 [%]
GAL_COORDS:      301.25,-74.16 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      350.87,-43.88 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 01 Dec 12 12:31:55 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     540178,   Seg_Num: 0
GRB_RA:           13.4698d {+00h 53m 52.75s} (J2000),
                  13.6197d {+00h 54m 28.71s} (current),
                  12.8886d {+00h 51m 33.27s} (1950)
GRB_DEC:         -42.9429d {-42d 56' 34.4"} (J2000),
                 -42.8730d {-42d 52' 22.7"} (current),
                 -43.2140d {-43d 12' 50.2"} (1950)
GRB_ERROR:       3.8 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  16262 TJD;   336 DOY;   12/12/01
IMG_START_TIME:  44893.00 SOD {12:28:13.00} UT,   150.9 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       248.07d {+16h 32m 16s}  -21.91d {-21d 54' 22"}
SUN_DIST:         98.14 [deg]   Sun_angle= -8.4 [hr] (East of Sun)
MOON_POSTN:      101.95d {+06h 47m 47s}  +19.22d {+19d 13' 17"}
MOON_DIST:       101.76 [deg]
MOON_ILLUM:      93 [%]
GAL_COORDS:      301.29,-74.18 [deg] galactic lon,lat of the burst
ECL_COORDS:      350.86,-43.86 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        TAM values, flux and significance fields are not valid.  
COMMENTS:        This position was automatically generated on the ground using  
COMMENTS:        Photon Counting data telemetered via TDRSS (SPER data).  
COMMENTS:        See http://www.swift.ac.uk/sper/docs.php for details.  
COMMENTS:        The probability that this is a serendipitous source in the  
COMMENTS:        SPER window is 0.58% < P(seren) < 1.1%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 01 Dec 12 12:31:25 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     540178,   Seg_Num: 0
POINT_RA:         13.488d {+00h 53m 57s} (J2000)
POINT_DEC:       -42.956d {-42d 57' 20"} (J2000)
POINT_ROLL:      229.771d
IMG_START_DATE:  16262 TJD;   336 DOY;   12/12/01
IMG_START_TIME:  44861.83 SOD {12:27:41.83} UT,   119.8 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.732
N_STARS:         76
X_OFFSET:        477 [pixels]
Y_OFFSET:        586 [pixels]
X_MAX:           1436 [pixels]
Y_MAX:           1545 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00540178000msufc0119.fits
SUN_POSTN:       248.07d {+16h 32m 16s}  -21.91d {-21d 54' 22"}
SUN_DIST:         98.14 [deg]   Sun_angle= -8.4 [hr] (East of Sun)
MOON_POSTN:      101.94d {+06h 47m 46s}  +19.22d {+19d 13' 19"}
MOON_DIST:       101.75 [deg]
MOON_ILLUM:      93 [%]
GAL_COORDS:      301.25,-74.16 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      350.87,-43.88 [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:     Sat 01 Dec 12 12:32:09 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     540178,   Seg_Num: 0
POINT_RA:         13.488d {+00h 53m 57s} (J2000)
POINT_DEC:       -42.956d {-42d 57' 20"} (J2000)
ROLL:            229.771d
IMG_START_DATE:  16262 TJD;   336 DOY;   12/12/01
IMG_START_TIME:  44861.83 SOD {12:27:41.83} UT,   119.8 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     376057671
X_OFFSET:        796 [pixels]
Y_OFFSET:        905 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       956
Y_GRB_POS:       1065
BINNING_INDEX:   1
IM_URL:          sw00540178000msuni0129.fits
SUN_POSTN:       248.07d {+16h 32m 16s}  -21.91d {-21d 54' 22"}
SUN_DIST:         98.14 [deg]   Sun_angle= -8.4 [hr] (East of Sun)
MOON_POSTN:      101.95d {+06h 47m 47s}  +19.22d {+19d 13' 16"}
MOON_DIST:       101.75 [deg]
MOON_ILLUM:      93 [%]
GAL_COORDS:      301.25,-74.16 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      350.87,-43.88 [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:     Sat 01 Dec 12 12:32:20 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     540178,   Seg_Num: 0
POINT_RA:         13.488d {+00h 53m 57s} (J2000)
POINT_DEC:       -42.956d {-42d 57' 20"} (J2000)
ROLL:            229.771d
IMG_START_DATE:  16262 TJD;   336 DOY;   12/12/01
IMG_START_TIME:  44861.83 SOD {12:27:41.83} UT,   119.8 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     376057671
X_OFFSET:        796 [pixels]
Y_OFFSET:        905 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       956
Y_GRB_POS:       1065
BINNING_INDEX:   1
IM_URL:          sw00540178000msuni0129.fits
SUN_POSTN:       248.07d {+16h 32m 16s}  -21.91d {-21d 54' 22"}
SUN_DIST:         98.14 [deg]   Sun_angle= -8.4 [hr] (East of Sun)
MOON_POSTN:      101.95d {+06h 47m 48s}  +19.22d {+19d 13' 15"}
MOON_DIST:       101.75 [deg]
MOON_ILLUM:      93 [%]
GAL_COORDS:      301.25,-74.16 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      350.87,-43.88 [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:     Sat 01 Dec 12 12:34:53 UT
NOTICE_TYPE:     Swift-UVOT Position
TRIGGER_NUM:     540178,   Seg_Num: 0
GRB_RA:           13.4673d {+00h 53m 52.15s} (J2000),
                  13.6172d {+00h 54m 28.11s} (current),
                  12.8861d {+00h 51m 32.67s} (1950)
GRB_DEC:         -42.9429d {-42d 56' 34.4"} (J2000),
                 -42.8730d {-42d 52' 22.7"} (current),
                 -43.2140d {-43d 12' 50.3"} (1950)
GRB_ERROR:       0.7 [arcsec radius, statistical only]
GRB_MAG:         19.70 +/- 0.16 [mag]
FILTER:          10, White
IMG_START_DATE:  16262 TJD;   336 DOY;   12/12/01
IMG_START_TIME:  44861.00 SOD {12:27:41.00} UT,   118.9 [sec] since BAT Trigger Time
SUN_POSTN:       248.07d {+16h 32m 17s}  -21.91d {-21d 54' 23"}
SUN_DIST:         98.13 [deg]   Sun_angle= -8.4 [hr] (East of Sun)
MOON_POSTN:      101.97d {+06h 47m 53s}  +19.22d {+19d 13' 04"}
MOON_DIST:       101.78 [deg]
MOON_ILLUM:      93 [%]
GAL_COORDS:      301.30,-74.18 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      350.86,-43.86 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT UVOT Position Notice.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        Result based on Genie data.  
COMMENTS:        Notice generated automatically.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 01 Dec 12 12:38:21 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     540178,   Seg_Num: 0
POINT_RA:         13.489d {+00h 53m 57s} (J2000)
POINT_DEC:       -42.956d {-42d 57' 21"} (J2000)
POINT_ROLL:      229.773d
IMG_START_DATE:  16262 TJD;   336 DOY;   12/12/01
IMG_START_TIME:  45019.85 SOD {12:30:19.85} UT,   277.8 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.502
N_STARS:         86
X_OFFSET:        237 [pixels]
Y_OFFSET:        346 [pixels]
X_MAX:           1676 [pixels]
Y_MAX:           1785 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00540178000msufc0277.fits
SUN_POSTN:       248.07d {+16h 32m 17s}  -21.91d {-21d 54' 25"}
SUN_DIST:         98.13 [deg]   Sun_angle= -8.4 [hr] (East of Sun)
MOON_POSTN:      102.00d {+06h 48m 00s}  +19.21d {+19d 12' 49"}
MOON_DIST:       101.78 [deg]
MOON_ILLUM:      93 [%]
GAL_COORDS:      301.24,-74.16 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      350.87,-43.88 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 01 Dec 12 12:38:50 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     540178,   Seg_Num: 0
POINT_RA:         13.489d {+00h 53m 57s} (J2000)
POINT_DEC:       -42.956d {-42d 57' 21"} (J2000)
POINT_ROLL:      229.773d
IMG_START_DATE:  16262 TJD;   336 DOY;   12/12/01
IMG_START_TIME:  45019.85 SOD {12:30:19.85} UT,   277.8 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.502
N_STARS:         86
X_OFFSET:        237 [pixels]
Y_OFFSET:        346 [pixels]
X_MAX:           1676 [pixels]
Y_MAX:           1785 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00540178000msufc0277.fits
SUN_POSTN:       248.07d {+16h 32m 17s}  -21.91d {-21d 54' 25"}
SUN_DIST:         98.13 [deg]   Sun_angle= -8.4 [hr] (East of Sun)
MOON_POSTN:      102.01d {+06h 48m 01s}  +19.21d {+19d 12' 46"}
MOON_DIST:       101.78 [deg]
MOON_ILLUM:      93 [%]
GAL_COORDS:      301.24,-74.16 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      350.87,-43.88 [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:     Sat 01 Dec 12 12:38:56 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     540178,   Seg_Num: 0
GRB_RA:           13.4679d {+00h 53m 52.29s} (J2000),
                  13.6178d {+00h 54m 28.26s} (current),
                  12.8867d {+00h 51m 32.81s} (1950)
GRB_DEC:         -42.9438d {-42d 56' 37.6"} (J2000),
                 -42.8739d {-42d 52' 25.9"} (current),
                 -43.2149d {-43d 12' 53.5"} (1950)
GRB_ERROR:       2.2 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  16262 TJD;   336 DOY;   12/12/01
IMG_START_TIME:  44893.00 SOD {12:28:13.00} UT,   150.9 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       248.07d {+16h 32m 17s}  -21.91d {-21d 54' 25"}
SUN_DIST:         98.13 [deg]   Sun_angle= -8.4 [hr] (East of Sun)
MOON_POSTN:      102.01d {+06h 48m 02s}  +19.21d {+19d 12' 46"}
MOON_DIST:       101.80 [deg]
MOON_ILLUM:      93 [%]
GAL_COORDS:      301.30,-74.18 [deg] galactic lon,lat of the burst
ECL_COORDS:      350.86,-43.86 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        This is an Update Notice -- the RA,Dec values herein supersede the previous XRT_POS Notice.  
COMMENTS:        TAM values, flux and significance fields are not valid.  
COMMENTS:        This position was automatically generated on the ground using  
COMMENTS:        Photon Counting data telemetered via TDRSS (SPER data).  
COMMENTS:        See http://www.swift.ac.uk/sper/docs.php for details.  
COMMENTS:        This position was enhanced using UVOT field astrometry.  
COMMENTS:        The probability that this is a serendipitous source in the  
COMMENTS:        SPER window is 0.58% < P(seren) < 1.1%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 01 Dec 12 12:39:30 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     540178,   Seg_Num: 0
POINT_RA:         13.489d {+00h 53m 57s} (J2000)
POINT_DEC:       -42.956d {-42d 57' 21"} (J2000)
ROLL:            229.773d
IMG_START_DATE:  16262 TJD;   336 DOY;   12/12/01
IMG_START_TIME:  45019.85 SOD {12:30:19.85} UT,   277.8 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     376057829
X_OFFSET:        796 [pixels]
Y_OFFSET:        905 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       956
Y_GRB_POS:       1065
BINNING_INDEX:   1
IM_URL:          sw00540178000msuni0287.fits
SUN_POSTN:       248.07d {+16h 32m 18s}  -21.91d {-21d 54' 25"}
SUN_DIST:         98.13 [deg]   Sun_angle= -8.4 [hr] (East of Sun)
MOON_POSTN:      102.01d {+06h 48m 03s}  +19.21d {+19d 12' 43"}
MOON_DIST:       101.79 [deg]
MOON_ILLUM:      93 [%]
GAL_COORDS:      301.24,-74.16 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      350.87,-43.88 [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:     Sat 01 Dec 12 12:39:46 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     540178,   Seg_Num: 0
POINT_RA:         13.489d {+00h 53m 57s} (J2000)
POINT_DEC:       -42.956d {-42d 57' 21"} (J2000)
ROLL:            229.773d
IMG_START_DATE:  16262 TJD;   336 DOY;   12/12/01
IMG_START_TIME:  45019.85 SOD {12:30:19.85} UT,   277.8 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     376057829
X_OFFSET:        796 [pixels]
Y_OFFSET:        905 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       956
Y_GRB_POS:       1065
BINNING_INDEX:   1
IM_URL:          sw00540178000msuni0287.fits
SUN_POSTN:       248.07d {+16h 32m 18s}  -21.91d {-21d 54' 25"}
SUN_DIST:         98.13 [deg]   Sun_angle= -8.4 [hr] (East of Sun)
MOON_POSTN:      102.01d {+06h 48m 03s}  +19.21d {+19d 12' 42"}
MOON_DIST:       101.79 [deg]
MOON_ILLUM:      93 [%]
GAL_COORDS:      301.24,-74.16 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      350.87,-43.88 [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:     Sat 01 Dec 12 12:44:36 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     540178,   Seg_Num: 0
POINT_RA:         13.489d {+00h 53m 57s} (J2000)
POINT_DEC:       -42.956d {-42d 57' 22"} (J2000)
POINT_ROLL:      229.773d
IMG_START_DATE:  16262 TJD;   336 DOY;   12/12/01
IMG_START_TIME:  45621.75 SOD {12:40:21.75} UT,   879.7 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.769
N_STARS:         182
X_OFFSET:        237 [pixels]
Y_OFFSET:        346 [pixels]
X_MAX:           1676 [pixels]
Y_MAX:           1785 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00540178000msufc0879.fits
SUN_POSTN:       248.08d {+16h 32m 18s}  -21.91d {-21d 54' 27"}
SUN_DIST:         98.13 [deg]   Sun_angle= -8.4 [hr] (East of Sun)
MOON_POSTN:      102.06d {+06h 48m 13s}  +19.21d {+19d 12' 21"}
MOON_DIST:       101.82 [deg]
MOON_ILLUM:      93 [%]
GAL_COORDS:      301.24,-74.16 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      350.87,-43.88 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 01 Dec 12 12:44:56 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     540178,   Seg_Num: 0
POINT_RA:         13.489d {+00h 53m 57s} (J2000)
POINT_DEC:       -42.956d {-42d 57' 22"} (J2000)
POINT_ROLL:      229.773d
IMG_START_DATE:  16262 TJD;   336 DOY;   12/12/01
IMG_START_TIME:  45621.75 SOD {12:40:21.75} UT,   879.7 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.769
N_STARS:         182
X_OFFSET:        237 [pixels]
Y_OFFSET:        346 [pixels]
X_MAX:           1676 [pixels]
Y_MAX:           1785 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00540178000msufc0879.fits
SUN_POSTN:       248.08d {+16h 32m 19s}  -21.91d {-21d 54' 27"}
SUN_DIST:         98.13 [deg]   Sun_angle= -8.4 [hr] (East of Sun)
MOON_POSTN:      102.06d {+06h 48m 14s}  +19.21d {+19d 12' 19"}
MOON_DIST:       101.82 [deg]
MOON_ILLUM:      93 [%]
GAL_COORDS:      301.24,-74.16 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      350.87,-43.88 [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:     Sat 01 Dec 12 12:46:03 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     540178,   Seg_Num: 0
POINT_RA:         13.489d {+00h 53m 57s} (J2000)
POINT_DEC:       -42.956d {-42d 57' 22"} (J2000)
ROLL:            229.773d
IMG_START_DATE:  16262 TJD;   336 DOY;   12/12/01
IMG_START_TIME:  45621.75 SOD {12:40:21.75} UT,   879.7 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     376058431
X_OFFSET:        796 [pixels]
Y_OFFSET:        905 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       956
Y_GRB_POS:       1065
BINNING_INDEX:   1
IM_URL:          sw00540178000msuni0889.fits
SUN_POSTN:       248.08d {+16h 32m 19s}  -21.91d {-21d 54' 28"}
SUN_DIST:         98.13 [deg]   Sun_angle= -8.4 [hr] (East of Sun)
MOON_POSTN:      102.07d {+06h 48m 16s}  +19.20d {+19d 12' 14"}
MOON_DIST:       101.82 [deg]
MOON_ILLUM:      93 [%]
GAL_COORDS:      301.24,-74.16 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      350.87,-43.88 [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:     Sat 01 Dec 12 12:46:17 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     540178,   Seg_Num: 0
POINT_RA:         13.489d {+00h 53m 57s} (J2000)
POINT_DEC:       -42.956d {-42d 57' 22"} (J2000)
ROLL:            229.773d
IMG_START_DATE:  16262 TJD;   336 DOY;   12/12/01
IMG_START_TIME:  45621.75 SOD {12:40:21.75} UT,   879.7 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     376058431
X_OFFSET:        796 [pixels]
Y_OFFSET:        905 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       956
Y_GRB_POS:       1065
BINNING_INDEX:   1
IM_URL:          sw00540178000msuni0889.fits
SUN_POSTN:       248.08d {+16h 32m 19s}  -21.91d {-21d 54' 28"}
SUN_DIST:         98.13 [deg]   Sun_angle= -8.4 [hr] (East of Sun)
MOON_POSTN:      102.07d {+06h 48m 17s}  +19.20d {+19d 12' 13"}
MOON_DIST:       101.82 [deg]
MOON_ILLUM:      93 [%]
GAL_COORDS:      301.24,-74.16 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      350.87,-43.88 [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 #14025
V. N. Yershov (UCL-MSSL), D. N. Burrows (PSU), N. P. M. Kuin (UCL-MSSL), F. E. Marshall (NASA/GSFC), S. R. Oates (UCL-MSSL), C. Pagani (U Leicester), K. L. Page (U Leicester), D. M. Palmer (LANL), M. H. Siegel (PSU) and T. N. Ukwatta (MSU) report on behalf of the Swift Team:
At 12:25:42 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 121201A (trigger=540178). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 13.488, -42.952 which is
```
   RA(J2000) = 00h 53m 57s
   Dec(J2000) = -42d 57' 06"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve is incomplete at this time due to a telemetry drop out, lacking most of the time period covered by this image trigger. Activity is visible starting at T-10s, but this is coincident with a pre-planned slew.
The XRT began observing the field at 12:27:37.1 UT, 115.1 seconds after the BAT trigger. Using promptly downlinked data we find a fading, uncatalogued X-ray source with an enhanced position: RA, Dec 13.4676, -42.9432 which is equivalent to:
```
   RA(J2000)  = 00h 53m 52.22s
   Dec(J2000) = -42d 56' 35.6"
```
with an uncertainty of 2.1 arcseconds (radius, 90% containment). This location is 62 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 (1.99 x 10^20 cm^-2, Kalberla et al. 2005), with an excess column of 1.9 (+1.03/-0.96) x 10^21 cm^-2 (90% confidence).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 119 seconds after the BAT trigger. There is a candidate afterglow in the rapidly available 2.7'x2.7' sub-image at
```
  RA(J2000)  =	00:53:52.17 =  13.46736
  DEC(J2000) = -42:56:34.4  = -42.94290
```
with a 90%-confidence error radius of about 0.66 arc sec. This position is 3.4 arc sec. from the center of the XRT error circle. The estimated magnitude is 19.71 with a 1-sigma error of about 0.16. No correction has been made for the expected extinction corresponding to E(B-V) of 0.01.
Burst Advocate for this burst is V. N. Yershov (vny AT mssl.ucl.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:     Sat 01 Dec 12 12:55:33 UT
NOTICE_TYPE:     Swift-UVOT Position
TRIGGER_NUM:     540178,   Seg_Num: 0
GRB_RA:           13.4673d {+00h 53m 52.15s} (J2000),
                  13.6172d {+00h 54m 28.11s} (current),
                  12.8861d {+00h 51m 32.67s} (1950)
GRB_DEC:         -42.9429d {-42d 56' 34.4"} (J2000),
                 -42.8730d {-42d 52' 22.7"} (current),
                 -43.2140d {-43d 12' 50.3"} (1950)
GRB_ERROR:       0.7 [arcsec radius, statistical only]
GRB_MAG:         19.70 +/- 0.16 [mag]
FILTER:          10, White
IMG_START_DATE:  16262 TJD;   336 DOY;   12/12/01
IMG_START_TIME:  44869.00 SOD {12:27:49.00} UT,   126.9 [sec] since BAT Trigger Time
SUN_POSTN:       248.09d {+16h 32m 20s}  -21.91d {-21d 54' 31"}
SUN_DIST:         98.12 [deg]   Sun_angle= -8.4 [hr] (East of Sun)
MOON_POSTN:      102.15d {+06h 48m 36s}  +19.19d {+19d 11' 32"}
MOON_DIST:       101.89 [deg]
MOON_ILLUM:      93 [%]
GAL_COORDS:      301.30,-74.18 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      350.86,-43.86 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT UVOT Position Notice.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.

GCN Circular #14026
S. Guziy (Mykolaiv Nat. Univ.), R. Sanchez-Ramirez (IAA-CSIC), L. Monteagudo Narvion (IAC), O. Lara, M. Jelinek (IAA-CSIC), P. Kubanek (IP AS CR), Y. Fan, X. Zhao, J. Bai, C. Wang, Y. Xin (Yunnan National Astronomical Observatory), Chenzhou Cui (Beijing National Astronomical Observatory), R. Cunniffe, A.J. Castro-Tirado, J.C. Tello and J. Gorosabel (IAA-CSIC), on behalf of a larger collaboration, report:
We have observed the GRB 121201A optical afterglow (GCN 14025, Yershov et al.) with the 0.6m BOOTES-4/MET robotic telescope at the Lijiang Astronomical Observatory (China). The afterglow is clear detected in XRT and UVOT position.
GCN Circular #14027
A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team.
Using 2580 s of XRT Photon Counting mode data and 5 UVOT images for GRB 121201A, 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 = 13.46759, -42.94306 which is equivalent to:
```
RA (J2000): 00h 53m 52.22s
Dec (J2000): -42d 56' 35.0"
```
with an uncertainty of 1.6 arcsec (radius, 90% confidence).
This position may be improved as more data are received. The latest position can be viewed at http://www.swift.ac.uk/xrt_positions. Position enhancement is described by Goad et al. (2007, A&A, 476, 1401) and Evans et al. (2009, MNRAS, 397, 1177).
This circular was automatically generated, and is an official product of the Swift-XRT team.
GCN Circular #14028
T. Sakamoto (AGU), 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), D. M. Palmer (LANL), G. Sato (ISAS), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU), V. N. Yershov (UCL-MSSL) (i.e. the Swift-BAT team):
Using the data set from T-60 to T+243 sec from the recent telemetry downlink, we report further analysis of BAT GRB 121201A (trigger #540178) (Yershov, et al., GCN Circ. 14025). The BAT ground-calculated position is RA, Dec = 13.473, -42.929 deg, which is
```
   RA(J2000)  =  00h 53m 53.6s 
   Dec(J2000) = -42d 55' 45.9" 
```
with an uncertainty of 2.3 arcmin, (radius, sys+stat, 90% containment). The partial coding was 100%.
The mask-weighted light curve shows 3 main peaks starting at ~T-23, peaking at ~T-18, -8, & +4 sec, and ending at ~T+55 sec. T90 (15-350 keV) is 85 +- 21 sec (estimated error including systematics).
The time-averaged spectrum from T-24.00 to T+71.00 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.90 +- 0.21. The fluence in the 15-150 keV band is 7.8 +- 1.0 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T-9.00 sec in the 15-150 keV band is 0.8 +- 0.1 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/540178/BA/
GCN Circular #14029
J.A. Kennea (PSU), M.C. Stroh (PSU), D.N. Burrows (PSU), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), C. Pagani (U. Leicester), P. D'Avanzo (INAF-OAB), V. D'Elia (ASDC), A. Maselli (INAF-IASFPA) and report on behalf of the Swift-XRT team: report on behalf of the Swift-XRT team:
We have analysed 8.7 ks of XRT data for GRB 121201A (yyyyy et al. et al. GCN Circ. xxxx), from 101 s to 33.6 ks after the BAT trigger. The data comprise 24 s in Windowed Timing (WT) mode (the first 7 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 Beardmore et al. (GCN. Circ 14027).
The light curve can be modelled with a power-law decay with a decay index of alpha=1.24 (+0.06, -0.05).
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 1.62 (+0.15, -0.09). The best-fitting absorption column is 2.15 (+3.39, -0.16) x 10^20 cm^-2, consistent with the Galactic value of 2.0 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 4.3 x 10^-11 (4.4 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     2.15 (+3.39, -0.16) x 10^20 cm^-2
Galactic foreground: 2.0 x 10^20 cm^-2
Excess significance: <1.6 sigma
Photon index:	     1.62 (+0.15, -0.09)
```
If the light curve continues to decay with a power-law decay index of 1.24, the count rate at T+24 hours will be 1.4 x 10^-3 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 5.8 x 10^-14 (6.0 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/00540178.
This circular is an official product of the Swift-XRT team.

GCN Circular #14030
N. P. M. Kuin (MSSL-UCL) reports on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 121201 120 s after the BAT trigger (Yershov et al., GCN Circ. 14025). A source consistent with the XRT position is detected in the initial UVOT exposures.
The preliminary UVOT position is:

    RA  (J2000) =  00:53:52.16 =  13.46732 (deg.)
    Dec (J2000) = -42:56:34.5  = -42.94292 (deg.)

with an estimated uncertainty of 0.62 arc sec. (radius, 90% confidence).
Preliminary detections and 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the early exposures are:

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

white              120          270          147         20.3 +/- 0.2
white              558          578           20         19.9 +/- 0.4
white             5689         5888          200         21.3 +/- 0.4
v                  608         1080           59        >19.6 
b                  534         1178           58         19.4 +/- 0.2
u                  278          528          125        >24.8
u                 6714         6914          200         20.6 +/- 0.5
w1                 830         6710          432        >21.3
m2                 632         6504          413        >21.1
w2                1036         6094          413        >20.8

The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.01 in the direction of the burst (Schlegel et al. 1998).

GCN Circular #14031
T. Kruehler (DARK/NBI), S. Klose (TLS Tautenburg) and J. Greiner (MPE Garching) report on behalf of the GROND team:
We observed the field of the Swift GRB 121201A (Yershov et al., GCN 14025) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2m MPI/ESO telescope at La Silla Observatory (Chile).
Observations started on December 02, 2012, 00:28 UT which is roughly 12.0 hr after the trigger. We clearly detect the afterglow of GRB 121201A (Yershov et al., GCN 14025) in the optical filters, but not in the NIR bands. Based on stacked images at a mid-time of 01:05 UT with an effective integration time of 25 min in g'r'i'z' and 20 min in JHKs, we estimate preliminary AB magnitudes and upper limits of:
```
g' = 24.2 +- 0.2 
r' = 23.0 +- 0.1
i' = 22.7 +- 0.1
z' = 22.5 +- 0.1
J  > 21.5
H  > 21.0
Ks > 19.9
```
These magnitudes and upper limits are calibrated against SDSS standards in the optical, and 2MASS field stars in the NIR bands. After correcting for the Galactic extinction corresponding to a reddening of E(B-V)=0.01 (Schlegel et al. 1998), a fit to this SED returns a photometric redshift of 3.6 +0.2 -0.3.
GCN Circular #14035
R. Sanchez-Ramirez (IAA-CSIC), A. de Ugarte Postigo (IAA-CSIC, DARK/NBI), T. Kruehler (DARK/NBI), B. Milvang-Jensen (DARK/NBI), J.P.U. Fynbo (DARK/NBI), N. Tanvir (U. Leicester), D. Malesani (DARK/NBI), S. Schulze (PUC & MCSS), L. Kaper (U. Amsterdam), H. Flores (Obs. Paris) report on behalf of the X-shooter GTO GRB collaboration,
We observed the afterglow of GRB121201A (Yeshov et al., GCN 14025, Kruehler et al. GCN 14031) using the X-shooter spectrograph on the VLT (Paranal Observatory, Chile). Observations consisted of 4x1200s exposures in the UVB and VIS arms and 8x600s exposures in the NIR, and started on 2 December 1:17 UT (12.87 hr after the burst).
In a preliminary reduction we detect Ly-alpha in emission as well as several absorption features (SiIV, CIV, AlII, AlIII) at a common redshift of z=3.385, which we identify as the redshift of the GRB.
We acknowledge the excellent support of the VLT staff, in particular G. Carraro.
GCN Report 404.1
GCN_Report 404.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_404_1.pdf by N.P.M. Kuin at UCL-MSSL titled: "Swift Observations of GRB 121201A"

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Jochen Greiner, last update: 02-Dec-2012 [Disclaimer]