Gamma-ray Burst 060223

(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 23 Feb 06 06:04:43 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     192059,   Seg_Num: 0
GRB_RA:           55.216d {+03h 40m 52s} (J2000),
                  55.286d {+03h 41m 09s} (current),
                  54.646d {+03h 38m 35s} (1950)
GRB_DEC:         -17.139d {-17d 08' 19"} (J2000),
                 -17.119d {-17d 07' 09"} (current),
                 -17.299d {-17d 17' 55"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       5231 [cnts]    Image_Peak=269 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   146     E_range: 25-100 keV
BKG_INTEN:       31439 [cnts]
BKG_TIME:        21846.96 SOD {06:04:06.96} UT
BKG_DUR:         8 [sec]
GRB_DATE:        13789 TJD;    54 DOY;   06/02/23
GRB_TIME:        21863.92 SOD {06:04:23.92} UT
GRB_PHI:         178.64 [deg]
GRB_THETA:        34.35 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     17.86 [sigma]
IMAGE_SIGNIF:    9.99 [sigma]
MERIT_PARAMS:     +1  +0  +0  +1  +2  +6  +0  +0 -23  +1 
SUN_POSTN:       336.35d {+22h 25m 23s}   -9.87d {-09d 52' 00"}
SUN_DIST:         76.64 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:      268.62d {+17h 54m 28s}  -28.63d {-28d 37' 56"}
MOON_DIST:       124.04 [deg]
MOON_ILLUM:      29 [%]
GAL_COORDS:      207.63,-49.72 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       47.88,-35.63 [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 = 155.85,3.31 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 23 Feb 06 06:05:57 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     192059,   Seg_Num: 0
POINT_RA:         55.196d {+03h 40m 47s} (J2000)
POINT_DEC:       -17.140d {-17d 08' 23"} (J2000)
IMG_START_DATE:  13789 TJD;    54 DOY;   06/02/23
IMG_START_TIME:  21949.85 SOD {06:05:49.85} UT,   85.9 [sec] since BAT Trigger Time
COUNTS:          6    Min_needed= 20
STD_DEV:         0.00   Max_StdDev_for_Good=28.44 [arcsec]
PH2_ITER:        1    Max_iter_allowed= 4
ERROR_CODE:      1
COMMENTS:        SWIFT-XRT Nack Position.  
COMMENTS:        No source found in the image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 23 Feb 06 06:07:52 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     192059,   Seg_Num: 0
GRB_RA:           55.216d {+03h 40m 52s} (J2000),
                  55.286d {+03h 41m 09s} (current),
                  54.646d {+03h 38m 35s} (1950)
GRB_DEC:         -17.139d {-17d 08' 19"} (J2000),
                 -17.119d {-17d 07' 09"} (current),
                 -17.299d {-17d 17' 55"} (1950)
GRB_DATE:        13789 TJD;    54 DOY;   06/02/23
GRB_TIME:        21863.92 SOD {06:04:23.92} UT
TRIGGER_INDEX:   146
GRB_PHI:         178.64 [deg]
GRB_THETA:        34.35 [deg]
DELTA_TIME:      64.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     17.86 [sigma]
IMAGE_SIGNIF:    9.99 [sigma]
LC_URL:          sw00192059000msb.lc
SUN_POSTN:       336.35d {+22h 25m 24s}   -9.87d {-09d 51' 56"}
SUN_DIST:         76.64 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:      268.65d {+17h 54m 36s}  -28.63d {-28d 37' 58"}
MOON_DIST:       124.02 [deg]
MOON_ILLUM:      29 [%]
GAL_COORDS:      207.63,-49.72 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       47.88,-35.63 [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 = 155.85,3.31 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 23 Feb 06 06:09:33 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     192059,   Seg_Num: 0
POINT_RA:         55.196d {+03h 40m 47s} (J2000)
POINT_DEC:       -17.140d {-17d 08' 23"} (J2000)
POINT_ROLL:      263.642d
IMG_START_DATE:  13789 TJD;    54 DOY;   06/02/23
IMG_START_TIME:  21949.41 SOD {06:05:49.41} UT,   85.5 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        0.716
N_STARS:         19
X_OFFSET:        348 [pixels]
Y_OFFSET:        599 [pixels]
X_MAX:           1307 [pixels]
Y_MAX:           1558 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00192059000msufc0085.fits
SUN_POSTN:       336.35d {+22h 25m 24s}   -9.87d {-09d 51' 55"}
SUN_DIST:         76.62 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:      268.67d {+17h 54m 41s}  -28.63d {-28d 37' 59"}
MOON_DIST:       124.00 [deg]
MOON_ILLUM:      29 [%]
GAL_COORDS:      207.62,-49.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       47.85,-35.63 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 23 Feb 06 06:10:24 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     192059,   Seg_Num: 0
POINT_RA:         55.196d {+03h 40m 47s} (J2000)
POINT_DEC:       -17.140d {-17d 08' 23"} (J2000)
POINT_ROLL:      263.642d
IMG_START_DATE:  13789 TJD;    54 DOY;   06/02/23
IMG_START_TIME:  21949.41 SOD {06:05:49.41} UT,   85.5 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        0.716
N_STARS:         19
X_OFFSET:        348 [pixels]
Y_OFFSET:        599 [pixels]
X_MAX:           1307 [pixels]
Y_MAX:           1558 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00192059000msufc0085.fits
SUN_POSTN:       336.35d {+22h 25m 24s}   -9.87d {-09d 51' 54"}
SUN_DIST:         76.62 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:      268.68d {+17h 54m 43s}  -28.63d {-28d 38' 00"}
MOON_DIST:       123.99 [deg]
MOON_ILLUM:      29 [%]
GAL_COORDS:      207.62,-49.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       47.85,-35.63 [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 23 Feb 06 06:10:54 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     192059,   Seg_Num: 0
POINT_RA:         55.196d {+03h 40m 47s} (J2000)
POINT_DEC:       -17.140d {-17d 08' 23"} (J2000)
ROLL:            263.642d
IMG_START_DATE:  13789 TJD;    54 DOY;   06/02/23
IMG_START_TIME:  21949.41 SOD {06:05:49.41} UT,   85.5 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     162367550
X_OFFSET:        668 [pixels]
Y_OFFSET:        919 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       828
Y_GRB_POS:       1079
BINNING_INDEX:   1
IM_URL:          sw00192059000msuni0085.fits
SUN_POSTN:       336.35d {+22h 25m 24s}   -9.87d {-09d 51' 54"}
SUN_DIST:         76.62 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:      268.69d {+17h 54m 44s}  -28.63d {-28d 38' 00"}
MOON_DIST:       123.99 [deg]
MOON_ILLUM:      29 [%]
GAL_COORDS:      207.62,-49.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       47.85,-35.63 [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 23 Feb 06 06:12:25 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     192059,   Seg_Num: 0
POINT_RA:         55.196d {+03h 40m 47s} (J2000)
POINT_DEC:       -17.140d {-17d 08' 23"} (J2000)
ROLL:            263.642d
IMG_START_DATE:  13789 TJD;    54 DOY;   06/02/23
IMG_START_TIME:  21949.41 SOD {06:05:49.41} UT,   85.5 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     162367550
X_OFFSET:        668 [pixels]
Y_OFFSET:        919 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       828
Y_GRB_POS:       1079
BINNING_INDEX:   1
IM_URL:          sw00192059000msuni0085.fits
SUN_POSTN:       336.35d {+22h 25m 24s}   -9.86d {-09d 51' 52"}
SUN_DIST:         76.62 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:      268.70d {+17h 54m 48s}  -28.63d {-28d 38' 00"}
MOON_DIST:       123.98 [deg]
MOON_ILLUM:      29 [%]
GAL_COORDS:      207.62,-49.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       47.85,-35.63 [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:        If you have elected to receive attachments:  
COMMENTS:        The uvot_catalog_image.fits.gz file does not exist; skipping the attachment.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 23 Feb 06 06:14:48 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     192059,   Seg_Num: 0
POINT_RA:         55.197d {+03h 40m 47s} (J2000)
POINT_DEC:       -17.138d {-17d 08' 15"} (J2000)
POINT_ROLL:      263.642d
IMG_START_DATE:  13789 TJD;    54 DOY;   06/02/23
IMG_START_TIME:  22156.29 SOD {06:09:16.29} UT,   292.4 [sec] since BAT Trigger Time
FILTER:          9, B
BKG_MEAN:        1.139
N_STARS:         19
X_OFFSET:        348 [pixels]
Y_OFFSET:        599 [pixels]
X_MAX:           1307 [pixels]
Y_MAX:           1558 [pixels]
DET_THRESH:      9
PHOTO_THRESH:    4
SL_URL:          sw00192059000msufc0292.fits
SUN_POSTN:       336.35d {+22h 25m 25s}   -9.86d {-09d 51' 50"}
SUN_DIST:         76.62 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:      268.73d {+17h 54m 55s}  -28.63d {-28d 38' 01"}
MOON_DIST:       123.97 [deg]
MOON_ILLUM:      29 [%]
GAL_COORDS:      207.62,-49.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       47.86,-35.62 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 23 Feb 06 06:15:31 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     192059,   Seg_Num: 0
POINT_RA:         55.197d {+03h 40m 47s} (J2000)
POINT_DEC:       -17.138d {-17d 08' 15"} (J2000)
POINT_ROLL:      263.642d
IMG_START_DATE:  13789 TJD;    54 DOY;   06/02/23
IMG_START_TIME:  22156.29 SOD {06:09:16.29} UT,   292.4 [sec] since BAT Trigger Time
FILTER:          9, B
BKG_MEAN:        1.139
N_STARS:         19
X_OFFSET:        348 [pixels]
Y_OFFSET:        599 [pixels]
X_MAX:           1307 [pixels]
Y_MAX:           1558 [pixels]
DET_THRESH:      9
PHOTO_THRESH:    4
SL_URL:          sw00192059000msufc0292.fits
SUN_POSTN:       336.35d {+22h 25m 25s}   -9.86d {-09d 51' 49"}
SUN_DIST:         76.62 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:      268.74d {+17h 54m 57s}  -28.63d {-28d 38' 02"}
MOON_DIST:       123.96 [deg]
MOON_ILLUM:      29 [%]
GAL_COORDS:      207.62,-49.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       47.86,-35.62 [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 23 Feb 06 06:15:59 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     192059,   Seg_Num: 0
POINT_RA:         55.197d {+03h 40m 47s} (J2000)
POINT_DEC:       -17.138d {-17d 08' 15"} (J2000)
ROLL:            263.642d
IMG_START_DATE:  13789 TJD;    54 DOY;   06/02/23
IMG_START_TIME:  22156.29 SOD {06:09:16.29} UT,   292.4 [sec] since BAT Trigger Time
FILTER:          9, B
EXPOSURE_ID:     162367757
X_OFFSET:        668 [pixels]
Y_OFFSET:        919 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       828
Y_GRB_POS:       1079
BINNING_INDEX:   1
IM_URL:          sw00192059000msuni0292.fits
SUN_POSTN:       336.35d {+22h 25m 25s}   -9.86d {-09d 51' 49"}
SUN_DIST:         76.62 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:      268.74d {+17h 54m 58s}  -28.63d {-28d 38' 02"}
MOON_DIST:       123.96 [deg]
MOON_ILLUM:      29 [%]
GAL_COORDS:      207.62,-49.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       47.86,-35.62 [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 23 Feb 06 06:17:18 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     192059,   Seg_Num: 0
POINT_RA:         55.197d {+03h 40m 47s} (J2000)
POINT_DEC:       -17.138d {-17d 08' 15"} (J2000)
ROLL:            263.642d
IMG_START_DATE:  13789 TJD;    54 DOY;   06/02/23
IMG_START_TIME:  22156.29 SOD {06:09:16.29} UT,   292.4 [sec] since BAT Trigger Time
FILTER:          9, B
EXPOSURE_ID:     162367757
X_OFFSET:        668 [pixels]
Y_OFFSET:        919 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       828
Y_GRB_POS:       1079
BINNING_INDEX:   1
IM_URL:          sw00192059000msuni0292.fits
SUN_POSTN:       336.35d {+22h 25m 25s}   -9.86d {-09d 51' 48"}
SUN_DIST:         76.61 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:      268.76d {+17h 55m 01s}  -28.63d {-28d 38' 03"}
MOON_DIST:       123.95 [deg]
MOON_ILLUM:      29 [%]
GAL_COORDS:      207.62,-49.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       47.86,-35.62 [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:        If you have elected to receive attachments:  
COMMENTS:        The uvot_catalog_image.fits.gz file does not exist; skipping the attachment.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 23 Feb 06 06:22:02 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     192059,   Seg_Num: 0
POINT_RA:         55.197d {+03h 40m 47s} (J2000)
POINT_DEC:       -17.138d {-17d 08' 15"} (J2000)
POINT_ROLL:      263.642d
IMG_START_DATE:  13789 TJD;    54 DOY;   06/02/23
IMG_START_TIME:  22698.28 SOD {06:18:18.28} UT,   834.4 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        0.713
N_STARS:         25
X_OFFSET:        348 [pixels]
Y_OFFSET:        599 [pixels]
X_MAX:           1307 [pixels]
Y_MAX:           1558 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00192059000msufc0834.fits
SUN_POSTN:       336.36d {+22h 25m 26s}   -9.86d {-09d 51' 43"}
SUN_DIST:         76.61 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:      268.81d {+17h 55m 14s}  -28.64d {-28d 38' 05"}
MOON_DIST:       123.92 [deg]
MOON_ILLUM:      29 [%]
GAL_COORDS:      207.62,-49.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       47.86,-35.62 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 23 Feb 06 06:23:16 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     192059,   Seg_Num: 0
POINT_RA:         55.197d {+03h 40m 47s} (J2000)
POINT_DEC:       -17.138d {-17d 08' 15"} (J2000)
POINT_ROLL:      263.642d
IMG_START_DATE:  13789 TJD;    54 DOY;   06/02/23
IMG_START_TIME:  22698.28 SOD {06:18:18.28} UT,   834.4 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        0.713
N_STARS:         25
X_OFFSET:        348 [pixels]
Y_OFFSET:        599 [pixels]
X_MAX:           1307 [pixels]
Y_MAX:           1558 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00192059000msufc0834.fits
SUN_POSTN:       336.36d {+22h 25m 26s}   -9.86d {-09d 51' 42"}
SUN_DIST:         76.61 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:      268.82d {+17h 55m 17s}  -28.64d {-28d 38' 06"}
MOON_DIST:       123.92 [deg]
MOON_ILLUM:      29 [%]
GAL_COORDS:      207.62,-49.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       47.86,-35.62 [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 23 Feb 06 06:23:32 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     192059,   Seg_Num: 0
POINT_RA:         55.197d {+03h 40m 47s} (J2000)
POINT_DEC:       -17.138d {-17d 08' 15"} (J2000)
ROLL:            263.642d
IMG_START_DATE:  13789 TJD;    54 DOY;   06/02/23
IMG_START_TIME:  22698.28 SOD {06:18:18.28} UT,   834.4 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     162368299
X_OFFSET:        668 [pixels]
Y_OFFSET:        919 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       828
Y_GRB_POS:       1079
BINNING_INDEX:   1
IM_URL:          sw00192059000msuni0834.fits
SUN_POSTN:       336.36d {+22h 25m 26s}   -9.86d {-09d 51' 42"}
SUN_DIST:         76.61 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:      268.82d {+17h 55m 18s}  -28.64d {-28d 38' 06"}
MOON_DIST:       123.91 [deg]
MOON_ILLUM:      29 [%]
GAL_COORDS:      207.62,-49.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       47.86,-35.62 [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 23 Feb 06 06:24:34 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     192059,   Seg_Num: 0
POINT_RA:         55.197d {+03h 40m 47s} (J2000)
POINT_DEC:       -17.138d {-17d 08' 15"} (J2000)
ROLL:            263.642d
IMG_START_DATE:  13789 TJD;    54 DOY;   06/02/23
IMG_START_TIME:  22698.28 SOD {06:18:18.28} UT,   834.4 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     162368299
X_OFFSET:        668 [pixels]
Y_OFFSET:        919 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       828
Y_GRB_POS:       1079
BINNING_INDEX:   1
IM_URL:          sw00192059000msuni0834.fits
SUN_POSTN:       336.36d {+22h 25m 26s}   -9.86d {-09d 51' 41"}
SUN_DIST:         76.61 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:      268.84d {+17h 55m 21s}  -28.64d {-28d 38' 06"}
MOON_DIST:       123.91 [deg]
MOON_ILLUM:      29 [%]
GAL_COORDS:      207.62,-49.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       47.86,-35.62 [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:        If you have elected to receive attachments:  
COMMENTS:        The uvot_catalog_image.fits.gz file does not exist; skipping the attachment.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 23 Feb 06 06:25:44 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     192059,   Seg_Num: 0
POINT_RA:         55.196d {+03h 40m 47s} (J2000)
POINT_DEC:       -17.138d {-17d 08' 15"} (J2000)
POINT_ROLL:      263.642d
IMG_START_DATE:  13789 TJD;    54 DOY;   06/02/23
IMG_START_TIME:  22905.14 SOD {06:21:45.14} UT,   1041.2 [sec] since BAT Trigger Time
FILTER:          9, B
BKG_MEAN:        1.139
N_STARS:         16
X_OFFSET:        348 [pixels]
Y_OFFSET:        599 [pixels]
X_MAX:           1307 [pixels]
Y_MAX:           1558 [pixels]
DET_THRESH:      9
PHOTO_THRESH:    4
SL_URL:          sw00192059000msufc1041.fits
SUN_POSTN:       336.36d {+22h 25m 26s}   -9.86d {-09d 51' 40"}
SUN_DIST:         76.61 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:      268.85d {+17h 55m 24s}  -28.64d {-28d 38' 07"}
MOON_DIST:       123.90 [deg]
MOON_ILLUM:      29 [%]
GAL_COORDS:      207.62,-49.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       47.86,-35.62 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 23 Feb 06 06:27:02 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     192059,   Seg_Num: 0
POINT_RA:         55.196d {+03h 40m 47s} (J2000)
POINT_DEC:       -17.138d {-17d 08' 15"} (J2000)
POINT_ROLL:      263.642d
IMG_START_DATE:  13789 TJD;    54 DOY;   06/02/23
IMG_START_TIME:  22905.14 SOD {06:21:45.14} UT,   1041.2 [sec] since BAT Trigger Time
FILTER:          9, B
BKG_MEAN:        1.139
N_STARS:         16
X_OFFSET:        348 [pixels]
Y_OFFSET:        599 [pixels]
X_MAX:           1307 [pixels]
Y_MAX:           1558 [pixels]
DET_THRESH:      9
PHOTO_THRESH:    4
SL_URL:          sw00192059000msufc1041.fits
SUN_POSTN:       336.36d {+22h 25m 27s}   -9.86d {-09d 51' 39"}
SUN_DIST:         76.61 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:      268.86d {+17h 55m 27s}  -28.64d {-28d 38' 07"}
MOON_DIST:       123.89 [deg]
MOON_ILLUM:      29 [%]
GAL_COORDS:      207.62,-49.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       47.86,-35.62 [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 23 Feb 06 06:27:19 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     192059,   Seg_Num: 0
POINT_RA:         55.196d {+03h 40m 47s} (J2000)
POINT_DEC:       -17.138d {-17d 08' 15"} (J2000)
ROLL:            263.642d
IMG_START_DATE:  13789 TJD;    54 DOY;   06/02/23
IMG_START_TIME:  22905.14 SOD {06:21:45.14} UT,   1041.2 [sec] since BAT Trigger Time
FILTER:          9, B
EXPOSURE_ID:     162368506
X_OFFSET:        668 [pixels]
Y_OFFSET:        919 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       828
Y_GRB_POS:       1079
BINNING_INDEX:   1
IM_URL:          sw00192059000msuni1041.fits
SUN_POSTN:       336.36d {+22h 25m 27s}   -9.86d {-09d 51' 39"}
SUN_DIST:         76.61 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:      268.87d {+17h 55m 28s}  -28.64d {-28d 38' 08"}
MOON_DIST:       123.89 [deg]
MOON_ILLUM:      29 [%]
GAL_COORDS:      207.62,-49.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       47.86,-35.62 [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 23 Feb 06 06:28:52 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     192059,   Seg_Num: 0
POINT_RA:         55.196d {+03h 40m 47s} (J2000)
POINT_DEC:       -17.138d {-17d 08' 15"} (J2000)
ROLL:            263.642d
IMG_START_DATE:  13789 TJD;    54 DOY;   06/02/23
IMG_START_TIME:  22905.14 SOD {06:21:45.14} UT,   1041.2 [sec] since BAT Trigger Time
FILTER:          9, B
EXPOSURE_ID:     162368506
X_OFFSET:        668 [pixels]
Y_OFFSET:        919 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       828
Y_GRB_POS:       1079
BINNING_INDEX:   1
IM_URL:          sw00192059000msuni1041.fits
SUN_POSTN:       336.36d {+22h 25m 27s}   -9.86d {-09d 51' 37"}
SUN_DIST:         76.61 [deg]   Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN:      268.88d {+17h 55m 32s}  -28.64d {-28d 38' 08"}
MOON_DIST:       123.88 [deg]
MOON_ILLUM:      29 [%]
GAL_COORDS:      207.62,-49.73 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       47.86,-35.62 [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:        If you have elected to receive attachments:  
COMMENTS:        The uvot_catalog_image.fits.gz file does not exist; skipping the attachment.

GCN Circular #4813
J. R. Cummings (NASA/ORAU), S. D. Barthelmy (NASA/GSFC), P. T. Boyd (NASA/GSFC), D. N. Burrows (PSU), M. Capalbi (ASDC), M. M. Chester (PSU), J. A. Kennea (PSU), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC/UMD), F. E. Marshall (NASA/GSFC), D. M. Palmer (LANL) and M. Perri (ASDC) report on behalf of the Swift Team:
At 06:04:23 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 060223 (trigger=192059). Swift slewed immediately to the burst. The BAT on-board calculated location is RA,Dec 55.216, -17.139 {03h 40m 52s, -17d 08' 19"} (J2000) with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a multi-peaked structure with a duration of about 15 sec. The peak count rate was ~1500 counts/sec (15-350 keV), at ~0 sec after the trigger.
The XRT began taking data at 06:05:49 UT, 86 seconds after the BAT trigger. The XRT on-board centroid algorithm did not find a source in the image and no prompt position is available. We are waiting for down-linked data to detect and determine a position for the source.
In response to the Swift/BAT trigger 192059, UVOT took a finding chart exposure of nominally 200 seconds with the V filter starting 86.5 seconds after the BAT trigger. There is a candidate afterglow in the sub-imagae and the list of sources generated on-board at (RA,DEC) (J2000) of (55.2065, -17.1301) with a 1-sigma error radius of about 1 arcsec. This position is 45.9 arcsec from the center of the BAT error circle. The estimated V magnitude is 17.6 with a 1-sigma error of about 0.5 mag.
GCN Circular #4814
F. Marshall (GSFC) P. Boyd (GSFC), M. Chester (PSU), J. Cummings (ORAU) on behalf of the Swift/UVOT team report:
We have further analyzed the four individual finding chart sub-images sent via TDRSS from the Swift UVOT containing the afterglow of GRB 060223 (Cummings et al., GCN 4813).
The source is detected in the first 3 finding charts with an upper limit in the fourth finding chart as follows:
```
Filter  T_start(s)      Exp(s)  (mag/UL (detection significance))

V       86              200     18.0 +/- 0.14 (10 sigma)
B       293             200     21.0     0.5  (2.5 sigma)
V       835             200     19.6     0.4  (3.5 sigma)
B       1042            200    >21.3          (2 sigma)
```
Reported times are in seconds since the BAT trigger. These magnitudes are uncorrected for the expected Galactic extinction corresponding to E(B-V) = 0.12.
We note that the higher than expected B-V inferred from the first three images could be caused by a redshift of z=3.3 or greater.
GCN Circular #4815
E. Berger (Carnegie), S. R. Kulkarni, A. Rau (Caltech), and D. B. Fox (Penn State) report on behalf of a large collaboration:
"Starting on 2006, Feb 23.2875 UT (39 min after the burst) we obtained spectroscopic observations of the optical afterglow of GRB 060223 (GCNs 4813,4814) using LRIS on the Keck-I 10-m telescope. In a single 720 sec exposure we detect a broad absorption profile which we identify as Lyman-alpha at a redshift z=4.41, as well as metal absorption features from OI, SiII, SiII*, etc at the same redshift."
GCN Circular #4820
J. Cummings (GSFC/NRC), S. Barthelmy (GSFC), L. Barbier (GSFC), E. Fenimore (LANL), N. Gehrels (GSFC), D. Hullinger (GSFC/UMD), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), 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 partial data set from T-300 to T+302 sec from telemetry downlinks, we report further analysis of BAT GRB 060223 (trigger #192059) (Cummings, et al., GCN 4813; Marshall et al, GCN 4814). The BAT ground-calculated position is RA,Dec = 55.188,-17.130 deg {3h 40m 45.1s, -17d 7' 46.6"} (J2000) +- 1.2 arcmin, (radius, sys+stat, 90% containment). The BAT error circle contains the afterglow detected by UVOT (GCN 4813). The partial coding was 69%.
The mask-weighted light curve shows a single episode of emission from T-4 to T+10 sec. There is a possible broad, faint precursor at ~T-25 sec, but no significant emission after T+10 sec. T90 (15-350 keV) is 11 +- 2 sec (estimated error including systematics).
The time-averaged spectrum from T-2.9 to T+10.0 is best fit by a simple power-law model. The power-law index of the time-averaged spectrum is 1.74 +- 0.12. The fluence in the 15-150 keV band is 6.8 +- 0.5 x 10^-07 erg/cm2. The 1-sec peak photon flux measured from T+0.08 sec in the 15-150 keV band is 1.4 +- 0.2 ph/cm2/sec. All the quoted errors are at the 90% confidence level. Given the redshift reported for this burst (Berger et al, GCN 4815), z = 4.41, we calculate Eiso = 2.82 10^52 ergs in the 81-812 keV band in the rest frame of the source.
GCN Circular #4823
M. Capalbi, M. Perri, L. Vetere (ASDC), K.L. Page (U. Leicester), J.=20 Kennea and D. Burrows (PSU) report on behalf of the Swift XRT team:
We have analysed the Swift XRT data from the first seven orbits=20 observation of GRB 060223 (Cummings et al. GCN 4813). We find an=20 uncatalogued fading source at the following location:
```
RA(J2000) =3D 03h  40m  49.74s
Dec(J2000) =3D -17d  07'  48.0"
```
We estimate an uncertainty of 3.7 arcseconds radius (90% containment).=20 This position is 44 arcsec from the BAT position and 2.6 arcsec from the=20 UVOT position given in GCN 4813.
The large flare in the first orbit makes determination of an afterglow=20 slope and extrapolation of the flux unreliable, and we will have to wait=20 for further data before an afterglow slope can be established.
A preliminary spectral fit to the Photon Counting mode data with an=20 absorbed power law gives a photon index of 1.9 =B1 0.3 and NH consisten= t=20 with the Galactic value (5.92E+20 cm^-2).
This circular is an official product of the Swift XRT Team.
GCN Circular #4824
A. J. Blustin (UCL-MSSL), J. R. Cummings (NASA/ORAU) report on behalf of the Swift/UVOT team:
The Swift/UVOT began observing the field of GRB 060223a 72 s after the BAT trigger, detecting a red afterglow (Cummings et al., GCN 4813; Marshall et al., GCN 4814). Analysis of a more complete dataset shows that V was the only band to yield a significant detection of the afterglow, as to be expected given the redshift of the burst (z=4.41; Berger et al., GCN 4815). The magnitudes and 3-sigma upper limits from all filters are listed below.
```
Filter  T_range (MET)  Exp (s)  Mag/3sigUL

V       72-81          9        17.7 +/- 0.4
V       85-285         200      17.8 +/- 0.1
V       545-1034       239      19.4 +/- 0.3
V       1294-11097     512      >19.6

B       292-492        200      >20.2
B       641-7249       731      >20.9

U       616-7044       532      >20.4
UVW1    593-6839       355      >20.4
UVM2    569-6634       355      >20.9
UVW2    521-10892      580      >21.1
```
These are uncorrected for the estimated Galactic extinction corresponding to E(B-V) = 0.12
GCN Circular #4827
M.Zhai, W.K. Zheng, Y.L. Qiu, J.Y. Wei,J.Y. Hu and J.S Deng, report on behalf of the Xinglong GRB follow-up team:
We observed the field of the GRB 20060223A(Cummings et al.GCN 4813)with the 0.8m telescope at Xinglong Observatory, National Astronomical Observatories,Chinese Academy of Sciences. We began observations on Feb 23.4787 UT, 5.4158 hours after the trigger without any filter. Within 600s exposure image we do not see the optical counterpart(Cummings et al.GCN 4813) down to 19.5 with 3-sigma detection.
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Jochen Greiner, last update: 24-Feb-2006 [Disclaimer]