Gamma-ray Burst 060202

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 02 Feb 06 08:42:11 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     179968,   Seg_Num: 0
GRB_RA:           35.843d {+02h 23m 22s} (J2000),
                  35.937d {+02h 23m 45s} (current),
                  35.075d {+02h 20m 18s} (1950)
GRB_DEC:         +38.362d {+38d 21' 43"} (J2000),
                 +38.389d {+38d 23' 22"} (current),
                 +38.135d {+38d 08' 06"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=1260 [image_cnts]
TRIGGER_DUR:     64.000 [sec] 
TRIGGER_INDEX:   20000     E_range: 15-50 keV
BKG_INTEN:       0 [cnts]
BKG_TIME:        -0.99 SOD {00:00:00.-98} UT
BKG_DUR:         0 [sec]
GRB_DATE:        13768 TJD;    33 DOY;   06/02/02
GRB_TIME:        31255.00 SOD {08:40:55.00} UT
GRB_PHI:         -156.01 [deg]
GRB_THETA:        38.13 [deg]
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    7.00 [sigma]
MERIT_PARAMS:     +1  +0  +0  +6  +1  -3  +0  +0  +4  +1 
SUN_POSTN:       315.83d {+21h 03m 19s}  -16.81d {-16d 48' 33"}
SUN_DIST:         92.91 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:        5.44d {+00h 21m 45s}   +2.21d {+02d 12' 23"}
MOON_DIST:        45.67 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      142.09,-21.07 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       46.43, 22.75 [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 = 142.07,11.42 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 02 Feb 06 08:43:54 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     179968,   Seg_Num: 0
GRB_RA:           35.8463d {+02h 23m 23.1s} (J2000),
                  35.9401d {+02h 23m 45.6s} (current),
                  35.0783d {+02h 20m 18.8s} (1950)
GRB_DEC:         +38.3859d {+38d 23' 09.2"} (J2000),
                 +38.4134d {+38d 24' 48.1"} (current),
                 +38.1591d {+38d 09' 32.8"} (1950)
GRB_ERROR:       5.8 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       39 [cnts]
IMG_START_DATE:  13768 TJD;    33 DOY;   06/02/02
IMG_START_TIME:  31398.32 SOD {08:43:18.32} UT,   143.3 [sec] since BAT Trigger Time
CENTROID_X:      343.98,  raw= 344  [pixels]
CENTROID_Y:      258.64,  raw= 259  [pixels]
ROLL:            250.70 [deg]
GAIN:            1
MODE:            2, Short Image mode
WAVEFORM:        134
EXPO_TIME:       0.10 [sec]
GRB_POS_XRT_Y:   -94.66
GRB_POS_XRT_Z:   100.61
IMAGE_URL:       sw00179968000msxim.img
SUN_POSTN:       315.83d {+21h 03m 19s}  -16.81d {-16d 48' 31"}
SUN_DIST:         92.91 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:        5.45d {+00h 21m 49s}   +2.21d {+02d 12' 53"}
MOON_DIST:        45.68 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      142.08,-21.04 [deg] galactic lon,lat of the burst
ECL_COORDS:       46.44, 22.78 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 02 Feb 06 08:43:53 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     179968,   Seg_Num: 0
GRB_RA:           35.8463d {+02h 23m 23.1s} (J2000),
                  35.9401d {+02h 23m 45.6s} (current),
                  35.0783d {+02h 20m 18.8s} (1950)
GRB_DEC:         +38.3859d {+38d 23' 09.2"} (J2000),
                 +38.4134d {+38d 24' 48.1"} (current),
                 +38.1591d {+38d 09' 32.8"} (1950)
GRB_ERROR:       5.8 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       2.46e-08 [erg/cm2/sec]
GRB_SIGNIF:      6.24 [sigma]
IMG_START_DATE:  13768 TJD;    33 DOY;   06/02/02
IMG_START_TIME:  31398.32 SOD {08:43:18.32} UT,   143.3 [sec] since BAT Trigger Time
TAM[0-3]:        327.65 237.18 261.45 242.90
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       315.83d {+21h 03m 19s}  -16.81d {-16d 48' 31"}
SUN_DIST:         92.91 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:        5.45d {+00h 21m 49s}   +2.21d {+02d 12' 52"}
MOON_DIST:        45.68 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      142.08,-21.04 [deg] galactic lon,lat of the burst
ECL_COORDS:       46.44, 22.78 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 02 Feb 06 08:44:42 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     179968,   Seg_Num: 0
GRB_RA:           35.8463d {+02h 23m 23.1s} (J2000),
                  35.9401d {+02h 23m 45.6s} (current),
                  35.0783d {+02h 20m 18.8s} (1950)
GRB_DEC:         +38.3859d {+38d 23' 09.2"} (J2000),
                 +38.4134d {+38d 24' 48.1"} (current),
                 +38.1591d {+38d 09' 32.8"} (1950)
GRB_ERROR:       5.8 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       39 [cnts]
IMG_START_DATE:  13768 TJD;    33 DOY;   06/02/02
IMG_START_TIME:  31398.32 SOD {08:43:18.32} UT,   143.3 [sec] since BAT Trigger Time
CENTROID_X:      343.98,  raw= 344  [pixels]
CENTROID_Y:      258.64,  raw= 259  [pixels]
ROLL:            250.70 [deg]
GAIN:            1
MODE:            2, Short Image mode
WAVEFORM:        134
EXPO_TIME:       0.10 [sec]
GRB_POS_XRT_Y:   -94.66
GRB_POS_XRT_Z:   100.61
IMAGE_URL:       sw00179968000msxim.img
SUN_POSTN:       315.83d {+21h 03m 19s}  -16.81d {-16d 48' 31"}
SUN_DIST:         92.91 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:        5.46d {+00h 21m 50s}   +2.22d {+02d 13' 06"}
MOON_DIST:        45.67 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      142.08,-21.04 [deg] galactic lon,lat of the burst
ECL_COORDS:       46.44, 22.78 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 02 Feb 06 08:45:11 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     179968,   Seg_Num: 0
GRB_RA:           35.843d {+02h 23m 22s} (J2000),
                  35.937d {+02h 23m 45s} (current),
                  35.075d {+02h 20m 18s} (1950)
GRB_DEC:         +38.362d {+38d 21' 43"} (J2000),
                 +38.389d {+38d 23' 22"} (current),
                 +38.135d {+38d 08' 06"} (1950)
GRB_DATE:        13768 TJD;    33 DOY;   06/02/02
GRB_TIME:        31255.00 SOD {08:40:55.00} UT
TRIGGER_INDEX:   20000
GRB_PHI:         -156.01 [deg]
GRB_THETA:        38.13 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     64.000 [sec] 
LC_URL:          sw00179968000msb.lc
SUN_POSTN:       315.83d {+21h 03m 19s}  -16.81d {-16d 48' 30"}
SUN_DIST:         92.90 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:        5.46d {+00h 21m 51s}   +2.22d {+02d 13' 15"}
MOON_DIST:        45.65 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      142.09,-21.07 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       46.43, 22.75 [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 = 142.07,11.42 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 02 Feb 06 08:47:13 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     179968,   Seg_Num: 0
POINT_RA:         35.823d {+02h 23m 18s} (J2000)
POINT_DEC:       +38.349d {+38d 20' 58"} (J2000)
POINT_ROLL:      250.696d
IMG_START_DATE:  13768 TJD;    33 DOY;   06/02/02
IMG_START_TIME:  31402.92 SOD {08:43:22.92} UT,   147.9 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        0.968
N_STARS:         140
X_OFFSET:        390 [pixels]
Y_OFFSET:        819 [pixels]
X_MAX:           1349 [pixels]
Y_MAX:           1778 [pixels]
DET_THRESH:      8
PHOTO_THRESH:    4
SL_URL:          sw00179968000msufc0147.fits
SUN_POSTN:       315.83d {+21h 03m 20s}  -16.81d {-16d 48' 29"}
SUN_DIST:         92.88 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:        5.48d {+00h 21m 56s}   +2.23d {+02d 13' 50"}
MOON_DIST:        45.61 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      142.07,-21.08 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       46.41, 22.75 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 02 Feb 06 08:48:28 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     179968,   Seg_Num: 0
POINT_RA:         35.823d {+02h 23m 18s} (J2000)
POINT_DEC:       +38.349d {+38d 20' 58"} (J2000)
POINT_ROLL:      250.696d
IMG_START_DATE:  13768 TJD;    33 DOY;   06/02/02
IMG_START_TIME:  31402.92 SOD {08:43:22.92} UT,   147.9 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        0.968
N_STARS:         140
X_OFFSET:        390 [pixels]
Y_OFFSET:        819 [pixels]
X_MAX:           1349 [pixels]
Y_MAX:           1778 [pixels]
DET_THRESH:      8
PHOTO_THRESH:    4
SL_URL:          sw00179968000msufc0147.fits
SUN_POSTN:       315.83d {+21h 03m 20s}  -16.81d {-16d 48' 28"}
SUN_DIST:         92.88 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:        5.49d {+00h 21m 58s}   +2.24d {+02d 14' 11"}
MOON_DIST:        45.60 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      142.07,-21.08 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       46.41, 22.75 [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 02 Feb 06 08:48:43 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     179968,   Seg_Num: 0
POINT_RA:         35.823d {+02h 23m 18s} (J2000)
POINT_DEC:       +38.349d {+38d 20' 58"} (J2000)
ROLL:            250.696d
IMG_START_DATE:  13768 TJD;    33 DOY;   06/02/02
IMG_START_TIME:  31402.92 SOD {08:43:22.92} UT,   147.9 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     160562603
X_OFFSET:        710 [pixels]
Y_OFFSET:        1139 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       870
Y_GRB_POS:       1299
BINNING_INDEX:   1
IM_URL:          sw00179968000msuni0147.fits
SUN_POSTN:       315.83d {+21h 03m 20s}  -16.81d {-16d 48' 28"}
SUN_DIST:         92.88 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:        5.50d {+00h 21m 59s}   +2.24d {+02d 14' 16"}
MOON_DIST:        45.59 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      142.07,-21.08 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       46.41, 22.75 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 02 Feb 06 08:49:56 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     179968,   Seg_Num: 0
POINT_RA:         35.823d {+02h 23m 18s} (J2000)
POINT_DEC:       +38.349d {+38d 20' 58"} (J2000)
ROLL:            250.696d
IMG_START_DATE:  13768 TJD;    33 DOY;   06/02/02
IMG_START_TIME:  31402.92 SOD {08:43:22.92} UT,   147.9 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     160562603
X_OFFSET:        710 [pixels]
Y_OFFSET:        1139 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       870
Y_GRB_POS:       1299
BINNING_INDEX:   1
IM_URL:          sw00179968000msuni0147.fits
SUN_POSTN:       315.83d {+21h 03m 20s}  -16.81d {-16d 48' 27"}
SUN_DIST:         92.88 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:        5.51d {+00h 22m 02s}   +2.24d {+02d 14' 37"}
MOON_DIST:        45.58 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      142.07,-21.08 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       46.41, 22.75 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 02 Feb 06 08:53:14 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     179968,   Seg_Num: 0
POINT_RA:         35.824d {+02h 23m 18s} (J2000)
POINT_DEC:       +38.352d {+38d 21' 06"} (J2000)
POINT_ROLL:      250.697d
IMG_START_DATE:  13768 TJD;    33 DOY;   06/02/02
IMG_START_TIME:  31609.76 SOD {08:46:49.76} UT,   354.8 [sec] since BAT Trigger Time
FILTER:          9, B
BKG_MEAN:        1.636
N_STARS:         129
X_OFFSET:        390 [pixels]
Y_OFFSET:        819 [pixels]
X_MAX:           1349 [pixels]
Y_MAX:           1778 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00179968000msufc0354.fits
SUN_POSTN:       315.84d {+21h 03m 21s}  -16.81d {-16d 48' 25"}
SUN_DIST:         92.88 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:        5.54d {+00h 22m 09s}   +2.26d {+02d 15' 34"}
MOON_DIST:        45.56 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      142.07,-21.08 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       46.41, 22.75 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 02 Feb 06 08:54:22 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     179968,   Seg_Num: 0
POINT_RA:         35.824d {+02h 23m 18s} (J2000)
POINT_DEC:       +38.352d {+38d 21' 06"} (J2000)
POINT_ROLL:      250.697d
IMG_START_DATE:  13768 TJD;    33 DOY;   06/02/02
IMG_START_TIME:  31609.76 SOD {08:46:49.76} UT,   354.8 [sec] since BAT Trigger Time
FILTER:          9, B
BKG_MEAN:        1.636
N_STARS:         129
X_OFFSET:        390 [pixels]
Y_OFFSET:        819 [pixels]
X_MAX:           1349 [pixels]
Y_MAX:           1778 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00179968000msufc0354.fits
SUN_POSTN:       315.84d {+21h 03m 21s}  -16.81d {-16d 48' 24"}
SUN_DIST:         92.88 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:        5.55d {+00h 22m 11s}   +2.26d {+02d 15' 53"}
MOON_DIST:        45.55 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      142.07,-21.08 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       46.41, 22.75 [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 02 Feb 06 08:54:37 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     179968,   Seg_Num: 0
POINT_RA:         35.824d {+02h 23m 18s} (J2000)
POINT_DEC:       +38.352d {+38d 21' 06"} (J2000)
ROLL:            250.697d
IMG_START_DATE:  13768 TJD;    33 DOY;   06/02/02
IMG_START_TIME:  31609.76 SOD {08:46:49.76} UT,   354.8 [sec] since BAT Trigger Time
FILTER:          9, B
EXPOSURE_ID:     160562810
X_OFFSET:        710 [pixels]
Y_OFFSET:        1139 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       870
Y_GRB_POS:       1299
BINNING_INDEX:   1
IM_URL:          sw00179968000msuni0354.fits
SUN_POSTN:       315.84d {+21h 03m 21s}  -16.81d {-16d 48' 24"}
SUN_DIST:         92.88 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:        5.55d {+00h 22m 12s}   +2.27d {+02d 15' 58"}
MOON_DIST:        45.54 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      142.07,-21.08 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       46.41, 22.75 [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 02 Feb 06 08:55:39 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     179968,   Seg_Num: 0
POINT_RA:         35.824d {+02h 23m 18s} (J2000)
POINT_DEC:       +38.352d {+38d 21' 06"} (J2000)
ROLL:            250.697d
IMG_START_DATE:  13768 TJD;    33 DOY;   06/02/02
IMG_START_TIME:  31609.76 SOD {08:46:49.76} UT,   354.8 [sec] since BAT Trigger Time
FILTER:          9, B
EXPOSURE_ID:     160562810
X_OFFSET:        710 [pixels]
Y_OFFSET:        1139 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       870
Y_GRB_POS:       1299
BINNING_INDEX:   1
IM_URL:          sw00179968000msuni0354.fits
SUN_POSTN:       315.84d {+21h 03m 21s}  -16.81d {-16d 48' 23"}
SUN_DIST:         92.88 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:        5.56d {+00h 22m 14s}   +2.27d {+02d 16' 16"}
MOON_DIST:        45.53 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      142.07,-21.08 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       46.41, 22.75 [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 02 Feb 06 09:00:57 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     179968,   Seg_Num: 0
POINT_RA:         35.824d {+02h 23m 18s} (J2000)
POINT_DEC:       +38.352d {+38d 21' 07"} (J2000)
POINT_ROLL:      250.697d
IMG_START_DATE:  13768 TJD;    33 DOY;   06/02/02
IMG_START_TIME:  32080.37 SOD {08:54:40.37} UT,   825.4 [sec] since BAT Trigger Time
FILTER:          9, B
BKG_MEAN:        1.608
N_STARS:         138
X_OFFSET:        390 [pixels]
Y_OFFSET:        819 [pixels]
X_MAX:           1349 [pixels]
Y_MAX:           1778 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00179968000msufc0825.fits
SUN_POSTN:       315.84d {+21h 03m 22s}  -16.81d {-16d 48' 19"}
SUN_DIST:         92.88 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:        5.60d {+00h 22m 25s}   +2.30d {+02d 17' 47"}
MOON_DIST:        45.49 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      142.07,-21.08 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       46.41, 22.75 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 02 Feb 06 09:02:02 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     179968,   Seg_Num: 0
POINT_RA:         35.824d {+02h 23m 18s} (J2000)
POINT_DEC:       +38.352d {+38d 21' 07"} (J2000)
POINT_ROLL:      250.697d
IMG_START_DATE:  13768 TJD;    33 DOY;   06/02/02
IMG_START_TIME:  32080.37 SOD {08:54:40.37} UT,   825.4 [sec] since BAT Trigger Time
FILTER:          9, B
BKG_MEAN:        1.608
N_STARS:         138
X_OFFSET:        390 [pixels]
Y_OFFSET:        819 [pixels]
X_MAX:           1349 [pixels]
Y_MAX:           1778 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00179968000msufc0825.fits
SUN_POSTN:       315.84d {+21h 03m 22s}  -16.81d {-16d 48' 18"}
SUN_DIST:         92.88 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:        5.61d {+00h 22m 27s}   +2.30d {+02d 18' 06"}
MOON_DIST:        45.48 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      142.07,-21.08 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       46.41, 22.75 [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 02 Feb 06 09:02:24 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     179968,   Seg_Num: 0
POINT_RA:         35.824d {+02h 23m 18s} (J2000)
POINT_DEC:       +38.352d {+38d 21' 07"} (J2000)
ROLL:            250.697d
IMG_START_DATE:  13768 TJD;    33 DOY;   06/02/02
IMG_START_TIME:  32080.37 SOD {08:54:40.37} UT,   825.4 [sec] since BAT Trigger Time
FILTER:          9, B
EXPOSURE_ID:     160563281
X_OFFSET:        710 [pixels]
Y_OFFSET:        1139 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       870
Y_GRB_POS:       1299
BINNING_INDEX:   1
IM_URL:          sw00179968000msuni0825.fits
SUN_POSTN:       315.84d {+21h 03m 22s}  -16.81d {-16d 48' 18"}
SUN_DIST:         92.88 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:        5.62d {+00h 22m 28s}   +2.30d {+02d 18' 12"}
MOON_DIST:        45.47 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      142.07,-21.08 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       46.41, 22.75 [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 02 Feb 06 09:03:50 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     179968,   Seg_Num: 0
POINT_RA:         35.824d {+02h 23m 18s} (J2000)
POINT_DEC:       +38.352d {+38d 21' 07"} (J2000)
ROLL:            250.697d
IMG_START_DATE:  13768 TJD;    33 DOY;   06/02/02
IMG_START_TIME:  32080.37 SOD {08:54:40.37} UT,   825.4 [sec] since BAT Trigger Time
FILTER:          9, B
EXPOSURE_ID:     160563281
X_OFFSET:        710 [pixels]
Y_OFFSET:        1139 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       870
Y_GRB_POS:       1299
BINNING_INDEX:   1
IM_URL:          sw00179968000msuni0825.fits
SUN_POSTN:       315.84d {+21h 03m 22s}  -16.80d {-16d 48' 17"}
SUN_DIST:         92.87 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:        5.63d {+00h 22m 31s}   +2.31d {+02d 18' 37"}
MOON_DIST:        45.46 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      142.07,-21.08 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       46.41, 22.75 [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 02 Feb 06 09:10:07 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     179968,   Seg_Num: 0
POINT_RA:         35.824d {+02h 23m 18s} (J2000)
POINT_DEC:       +38.352d {+38d 21' 06"} (J2000)
POINT_ROLL:      250.697d
IMG_START_DATE:  13768 TJD;    33 DOY;   06/02/02
IMG_START_TIME:  32286.71 SOD {08:58:06.71} UT,   1031.7 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        0.976
N_STARS:         157
X_OFFSET:        390 [pixels]
Y_OFFSET:        819 [pixels]
X_MAX:           1349 [pixels]
Y_MAX:           1778 [pixels]
DET_THRESH:      8
PHOTO_THRESH:    4
SL_URL:          sw00179968000msufc1031.fits
SUN_POSTN:       315.85d {+21h 03m 24s}  -16.80d {-16d 48' 12"}
SUN_DIST:         92.87 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:        5.69d {+00h 22m 45s}   +2.34d {+02d 20' 26"}
MOON_DIST:        45.40 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      142.07,-21.08 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       46.41, 22.75 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 02 Feb 06 09:11:22 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     179968,   Seg_Num: 0
POINT_RA:         35.824d {+02h 23m 18s} (J2000)
POINT_DEC:       +38.352d {+38d 21' 06"} (J2000)
POINT_ROLL:      250.697d
IMG_START_DATE:  13768 TJD;    33 DOY;   06/02/02
IMG_START_TIME:  32286.71 SOD {08:58:06.71} UT,   1031.7 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        0.976
N_STARS:         157
X_OFFSET:        390 [pixels]
Y_OFFSET:        819 [pixels]
X_MAX:           1349 [pixels]
Y_MAX:           1778 [pixels]
DET_THRESH:      8
PHOTO_THRESH:    4
SL_URL:          sw00179968000msufc1031.fits
SUN_POSTN:       315.85d {+21h 03m 24s}  -16.80d {-16d 48' 11"}
SUN_DIST:         92.87 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:        5.70d {+00h 22m 47s}   +2.35d {+02d 20' 47"}
MOON_DIST:        45.39 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      142.07,-21.08 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       46.41, 22.75 [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 02 Feb 06 09:11:39 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     179968,   Seg_Num: 0
POINT_RA:         35.824d {+02h 23m 18s} (J2000)
POINT_DEC:       +38.352d {+38d 21' 06"} (J2000)
ROLL:            250.697d
IMG_START_DATE:  13768 TJD;    33 DOY;   06/02/02
IMG_START_TIME:  32286.71 SOD {08:58:06.71} UT,   1031.7 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     160563487
X_OFFSET:        710 [pixels]
Y_OFFSET:        1139 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       870
Y_GRB_POS:       1299
BINNING_INDEX:   1
IM_URL:          sw00179968000msuni1031.fits
SUN_POSTN:       315.85d {+21h 03m 24s}  -16.80d {-16d 48' 11"}
SUN_DIST:         92.87 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:        5.70d {+00h 22m 48s}   +2.35d {+02d 20' 52"}
MOON_DIST:        45.39 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      142.07,-21.08 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       46.41, 22.75 [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 02 Feb 06 09:13:03 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     179968,   Seg_Num: 0
POINT_RA:         35.824d {+02h 23m 18s} (J2000)
POINT_DEC:       +38.352d {+38d 21' 06"} (J2000)
ROLL:            250.697d
IMG_START_DATE:  13768 TJD;    33 DOY;   06/02/02
IMG_START_TIME:  32286.71 SOD {08:58:06.71} UT,   1031.7 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     160563487
X_OFFSET:        710 [pixels]
Y_OFFSET:        1139 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       870
Y_GRB_POS:       1299
BINNING_INDEX:   1
IM_URL:          sw00179968000msuni1031.fits
SUN_POSTN:       315.85d {+21h 03m 24s}  -16.80d {-16d 48' 10"}
SUN_DIST:         92.87 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:        5.71d {+00h 22m 51s}   +2.35d {+02d 21' 16"}
MOON_DIST:        45.38 [deg]
MOON_ILLUM:      20 [%]
GAL_COORDS:      142.07,-21.08 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       46.41, 22.75 [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 #4629
D. Fox (PSU), S. Barthelmy (GSFC), D. Burrows (PSU), J. Cummings (GSFC/NRC), N. Gehrels (GSFC), S.T. Holland (GSFC/USRA), S. Hunsberger (PSU), H. Krimm (GSFC/USRA), D. Morris (PSU), D. Palmer (LANL) on behalf of the Swift team:
At 08:40:55 UT, Swift-BAT triggered and located GRB 060202 (trigger=179968). The spacecraft slewed immediately. The BAT on-board calculated location is RA,Dec 35.843d,+38.362d {02h 23m 22s,+38d 21' 43"} (J2000), with an uncertainty of 3 arcmin (radius, 90% containment, stat+sys). This was a 64-sec image trigger. The BAT light curve shows a broad and weak peak with a total duration of >20 sec. The peak count rate was ~500 counts/sec (15-350 keV), at ~5 seconds after the trigger.
XRT began observing the GRB at 08:43:18 UT, 143.3s after the BAT trigger. A bright, uncatalogued, fading source, was found by the on-board centroiding algorithm at
```
RA(J2000)=02h 23m 23.1s
DEC(J2000)=+38d 23' 09.2"
```
with an uncertainty of 6 arcseconds radius (90% containment). This position lies 87 arcseconds from the center of the BAT error circle. The XRT count rate clearly decreases as a power law in the first 100s. The initial XRT flux was ~2.5E-8 ergs/cm2/s.
UVOT took a finding chart exposure of 200 seconds with the V filter starting 148 seconds after the BAT trigger. No 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 18th mag. The 8'x8' region for the list of sources generated on-board covers 100% of the XRT error circle. The list of sources is typically complete to about 18.0 mag. No correction has been made for the expected extinction of about 0.2 magnitudes.
GCN Circular #4630
A. Monfardini, C.G. Mundell, C. Guidorzi, I. A. Steele, A. Gomboc, C.J. Mottram, R.J. Smith, D. Bersier, A. Melandri, S. Kobayashi, D. Carter, M.F. Bode (Liverpool JMU), P. O'Brien, E. Rol, N. Bannister (U. of Leicester) report:
"The 2-m Faulkes Telescope North robotically followed up GRB060202 (SWIFT trigger 179968) 4.2 min after the GRB trigger time. We do not detect any obvious optical candidate within the XRT error circle (Fox et al., GCN 4629). Limiting magnitudes have been derived with reference to USNOB1."
```
Exposure  Filter  Start Time    End Time     Lim. Mag.
                  (since GRB)   (since GRB)    (5sig)
-----------------------------------------------------
3x10s     R       4.2 min          5.0 min      20.0
410 s     R       4.2 min         32.5 min      21.5
400 s     i'      7.7 min         36.2 min      20.5
-----------------------------------------------------
```
GCN Circular #4631
M. Yang, K.Y. Huang, W.H. Ip (NCU), Y. Urata(RIKEN), Y. Qiu (BAO), Y.Q. Lou (THCA) on behalf of EAFON report:
"A set of R and I band imaging observation using LOT (One-meter telescope at Lulin Observatory, Taiwan) started at 10.9 UT. No variable source was detected in the XRT error region (Fox et al. GCN 4629) at our co-add R and I band images. The limiting magnitude of I and R band were calibrated against USNO-B1.0 catalog.
```
Mid-UT(hrs)   Exp-time   Filter   limiting mag. (3-sigma)
 ----------------------------------------------------------
   2.35       3x300s     R         ~21.2
   2.72       3x300s     I         ~19.5
```
This message may be cited."
GCN Circular #4632
This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools.
--0-1714918604-1138890267=:9390 Content-Type: TEXT/PLAIN; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE
D. Morris (PSU), D. Fox (PSU), D. Burrows (PSU), N. Gehrels (GSFC), F.=20 Marshall (GSFC), P. Boyd (GSFC-UMBC), J. Kennea (PSU), H. Krimm=20 (GSFC/USRA), D. Palmer (LANL) report on behalf of the Swift XRT team:
We have analyzed the Swift XRT data from the first orbit observation of=20 GRB 060202 (Fox et al., GCN4629), with a total exposure of 540 seconds.=20 The refined XRT position is:
```
RA(J2000) =3D 02h 23m 23.02s
Dec(J2000) =3D +38d 23' 05.7"
```
This position is 82.8 arcseconds from the BAT and 3.7 arcseconds from the= =20 XRT position given in GCN 4629. We estimate an uncertainty of 4 arcseconds= =20 radius (90% containment).
The 0.2-10 keV light curve in Windowed Timing (WT) mode starts 148.8=20 seconds from the BAT trigger (T0). The lightcurve shows a steep early=20 decay index of 2.7 followed by a flattening to a decay index of 0.2 at=20 T+310s.
A preliminary spectral fit to the WT data gives a spectral power law=20 photon index of 2.52 =B1 0.03 in the [0.2-10] keV band with NH of 5.8e21 +/= -=20 2e20, well above the galactic NH value for this direction of 5.1e20. The=20 unabsorbed 0.2-10 keV flux at the start of the XRT observation is=20 estimated to be about 2.5E-8 erg/cm2/s, flattening at a flux level of=20 about 2E-9 erg/cm2/s. We do not have sufficient data at this time to allow= =20 an accurate extrapolation of the flux to T+24 hr.
This Circular is an official product of the Swift XRT Team. --0-1714918604-1138890267=:9390--
GCN Circular #4633
A. J. Blustin (UCL-MSSL), D. Fox (PSU), B. Hancock (UCL-MSSL), T. Kennedy (UCL-MSSL), N. Gehrels (GSFC) on behalf of the Swift/UVOT team report:
The Swift/UVOT began taking data on the field of GRB 060202 at 08:43:09 UT on 2006-02-02, 134 s after the BAT trigger (Fox et al., GCN 4629). No afterglow candidate is detected in summed images in any filter within the refined XRT error circle (Morris et al., GCN 4632) down to the following 3-sigma magnitude upper limits.
```
Filter  T_range(s)  Exp(s)  3sigUL(mag)
V       134-1231    449     19.6
B       355-1025    419     20.5
U       656-4847    91      19.1
UVW1    633-4840    119     18.7
UVM2    608-4816    119     19.2
UVW2    561-4768    99      19.0
```
These magnitudes are uncorrected for Galactic extinction; E(B-V) = 0.047. We note that the XRT position is 19 arcseconds away from the nearest star in the DSS.
GCN Circular #4634
E.Sonoda,S.Maeno,S.Masuda,Y.Nakamura,M.Yamauchi (University of Miyazaki)
"We have observed the field covering the error circle of GRB060202 (GCN 4629) with the unfiltered CCD camera on the 30-cm telescope at University of Miyazaki. The observation was started 09:28:22 UT, 47.45 min after the Swift trigger time. After co-adding a set of 14 images (09:40:34 - 09:57:32 UT) of 30 sec exposures, we have compared with the USNO A2.0 catalog. Preliminary analysis shows there is no new source brighter than 16.9 mag."
GCN Circular #4635
D. Hullinger (GSFC/UMD), L. Barbier (GSFC), S. Barthelmy (GSFC), J. Cummings (GSFC/NRC), E. Fenimore (LANL), N. Gehrels (GSFC), D. Hinshaw (GSFC-SPSYS), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), K. McLean (LANL), D. Palmer (LANL), A. Parsons (GSFC), T. Sakamoto (GSFC/NRC), G. Sato (ISAS), J. Tueller (GSFC) on behalf of the Swift-BAT team:
Using the data set from T-300 to T+303 sec from the recent telemetry downlink, we report further analysis of BAT GRB 060202 (trigger #179968) (Fox, et al., GCN 4629). The BAT ground-calculated position is (RA,Dec) = 35.822, 38.381 deg {2h 23m 17.3s, 38d 22' 53.3"} (J2000) +- 2.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 61%.
The mask-tagged light curve shows two broad main peaks with roughly equal peak count rates. The first peak is from approximately T-40 to T+40 sec and the second roughly from T+ ~70 to T+210 sec. The second peak appears to be spectrally softer than the first peak. We note that XRT observations (Morris, et al, GCN 4632) started at T+148.8 seconds and thus overlapped with ~70 seconds of the prompt emission detected by BAT. T90 (15-350 keV) is (203.7 +- 20) sec (estimated error including systematics).
The time-averaged spectrum from T-36.1 to T+196.6 is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.78 +- 0.13. The fluence in the 15-150 keV band is (2.4 +- 0.2) x 10^-06 erg/cm2. The 1-sec peak photon flux measured from T-6.46 sec in the 15-150 keV band is (0.5 +- 0.2) ph/cm2/sec. All the quoted errors are at the 90% confidence level.
GCN Circular #4636
S. B. Cenko, D.-S. Moon, (Caltech), and B. P. Schmidt (MSO-ANU) report on behalf of a larger collaboration:
We have imaged the field GRB060202 (Fox et al., GCN 4629) with the Low-Resolution Imaging Spectrometer mounted on the 10-m Keck I telescope. Observations consisted of 2 x 300 s images taken simultaneously in the g and I filters at a mean time of approximately February 3.22. Images were taken under good seeing conditions, though shortly after sunset with a high background.
Inside the revised XRT error circle (Morris et al., GCN 4632), we find one faint source (S1) in our I-band images detected at approximately the 2-sigma level. The location of this source is (J2000):
```
	RA: 02:23:22.88
	Dec: +38:23:04.3
```
with an approximate error of 1.0" in each coordinate. The magnitude of this object, with reference to the USNO-B2 catalog, is approximately I = 22.6 +/- 0.3, with photometric calibration dominating the errors. We find no source in our g-band coadd at this location to a limiting magnitude of approximately g > 22.0. We note this position is consistent with the detection of a K-band source with UKIRT by Wang et al. (private communication, GCN forthcoming).
There is one additional source (S2), of similar magnitude and color, located just outside the edge of the XRT error circle, which we include for completeness. The location of this source (J2000.0) is:
```
	RA: 02:23:22.80
	Dec: +38:23:08.9
```
While we cannot comment on variability at this time, we propose that the source S1 is the afterglow of GRB 060202.
The early R-band limits provided by Monfardini et al. (GCN 4630) indicate a red R-I color for this potential afterglow. Given the possibility that this object is at high redshift (z > 5), we have triggered Gemini NIR imaging of the field. A report on these observations will follow in a subsequent GCN.
GCN Circular #4637
W-H. Wang (UH/IfA), Y. Kakazu (UH/IfA), B. P. Schmidt (MSO-ANU), and L. L. Cowie (UH/IfA)
We have imaged the field GRB060202 (Fox et al., GCN 4629) with the UKIRT Wide Field Camera in J and K-band filters from approximately UT 05:00 to 08:20 on Feb 03.
Observations consisted of 10s expsosures in both J and K with a 9-point dither pattern with +/-6.4" and 12.8" offsets. Total integration times for J and K are 60 and 72 minutes, respectively. Images were processed using the UKIRT real-time pipeline ORACDR and we tried to obtain a better background subtraction on the final coadded image. The final image quality is limited by the poor seeing at low elevation and telescope pointing, and has a PSF of 2".
We detected a faint source inside the revised 4" XRT error circle (Morris et al., GCN 4632) in K-band images. The location of this source is:
RA = 02:23:22.94, DEC = +38:23:03.69 (J2000.0)
This is consistent with the Keck/LRIS I-band detection reported by Cenko et al. (GCN 4636) within 1". The magnitude of this source is K = 19.86 with 3" aperture diameter, using nearby 2MASS stars for calibration. A PSF fit, however, suggests the point component may be almost a magnituder fainter and there may be some underlying diffuse emission.
In the J band image, we found no source within the XRT error circle to a 1 sigma limiting magnitude of J > 22.74 [2MASS].
GCN Circular #4638
M. Abe, K. Kitazato (ISAS/JAXA), H. Mito (U. Tokyo), Y. Urata (RIKEN), K.Y. Huang, Y. Qiu (BAO) on behalf of EAFON report:
"We have observed entire error region of GRB 060202 (Fox et al. #4629) using Kiso 1.05m Schmidt telescope. The set of B and R band images were taken from 1.67 hours after the burst. The afterglow candidates (Cenko et al. # 4636) did not appear in combined images. The 3-sigma limiting magnitude of B and R are 19.8 and 20.5, respectively."
This message may be cited.
GCN Circular #4639
B. Schmidt (ANU), Edo Berger (OCIW), Yuko Kakazu (IfA), Len Cowie (IfA) and Brad Cenko (CalTech) on behalf of a larger collaboration report,
"We have imaged the field GRB060202 (Fox et al., GCN 4629) with Gemini-N + NIRI in J, H, and K_s filters at approximately UT 06:30, 2006 Feb 03. We confirm the faint source of Cenko et al. (GCN 4636) and Wang et=20 al. (GCN 4637) inside the revised 4" XRT error circle (Morris et al.,=20 GCN 4632) in K-band images. We marginally detect the source in J. Using=20 the 2MASS star at RA=3D2:23:26.6 DEC=3D38:23:29 (J2000), we estimate the magnitude of the source in a 1" aperture to be
```
J = 23.0 =B1 0.4
H >= 21.1
K = 20.1 =B1 0.2
```
These observations, combined with the results of Cenko et al. and Wang=20 et al. indicate that GRB060202 is most likely at z<6.
We would like to thank the Staff of Gemini for their help in executing=20 these Target of Opportunity observations"
GCN Circular #4640
K. Kinugasa (Gunma Astronomical Observatory) and K. Torii (Osaka U.) report:
The error region of GRB 060202 (Fox, et al. GCN 4629) was imaged by the robotic 0.25m GETS telescope in the Gunma Astronomical Observatory. Unfiltered imaging started at 09:17:06 UT (36.2 minutes after the trigger) and 30 s integration was repeated.
We can not identify a new object within the XRT error region (Morris, et al. GCN 4632) and the afterglow candidates (Cenko et al. GCN4636). The following 3-sigma upper limits are derived relative to USNO-A1.0 R mag.
```
------------------------------------------
StartUT  EndUT    Limit  Nframes
------------------------------------------
09:17:06 09:17:36 >16.9  1
09:17:06 09:44:31 >19.0  33
------------------------------------------
```
GCN Circular #4642
C. MacLeod, J. Haislip, M. Nysewander, A. LaCluyze, D. Reichart, J. A. Crain, A. Foster, K. Ivarsen, and J. Kirschbrown report on behalf of the UNC team of the FUN GRB collaboration:
We observed the localization of GRB 060202 (Fox et al., GCN 4629; Morris et al., GCN 4632) with three of the PROMPT telescopes simultaneously in Ur'I beginning 16.1 hours after the burst under the automated control of Skynet:
```
Filter  Telescope  Start (UT)  Stop (UT)  Exposures  Total (hr)
U       PROMPT-2   00:38:20    00:57:40   12 x 80s   0.32
r'      PROMPT-4   00:37:37    00:57:57   13 x 80s   0.34
I       PROMPT-1   00:38:15    00:57:14   12 x 80s   0.32
```
No new source is found to I > 19.1 mag (3 sigma; calibrated to seven USNO-B1.0 stars).
PROMPT is currently being built and commissioned at CTIO.
GCN Circular #4653
W.-H. Wang, Y. Kakazu (UH-IfA), B. P. Schmidt (ANU), L. L. Cowie (UH-IfA), S. B. Cenko, and D.-S. Moon (Caltech)
We have reobserved the field GRB060202 (Fox et al., GCN 4629) with the Wide Field Camera on UKIRT in K-band filter at a mean epoch of approximately 5:45 UT on the February 4th. Our total integration time is 36 min.
We still see the faint source reported by Wang et al. (GCN 4638) at roughly the same magnitude (K=20.07 in 3" aperture diameter).
We have imaged the same region also with the Low-Resolution Imaging Spectrometer mounted on the 10-m Keck I telescope. Observations consisted of 4 x 150 s images taken in the I-band filter at a mean time about 5:50 UT on February 4th.
The faint source (S1) reported by Cenko et al. (GCN 4636) was detected at roughly the same magnitude (I = 22.9 +/- 0.3).
Our results suggest that the source S1 is not a GRB afterglow.
Redshift of z=0.783 (of host galaxy)
Butler N.R., 2007, ApJ 656, 1001

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Jochen Greiner, last update: 22-Jul-2007 [Disclaimer]