Gamma-ray Burst 080409

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 09 Apr 08 01:23:11 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     308812,   Seg_Num: 0
GRB_RA:           84.333d {+05h 37m 20s} (J2000),
                  84.443d {+05h 37m 46s} (current),
                  83.668d {+05h 34m 40s} (1950)
GRB_DEC:          +5.085d {+05d 05' 07"} (J2000),
                  +5.090d {+05d 05' 23"} (current),
                  +5.056d {+05d 03' 22"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       3124 [cnts]    Image_Peak=260 [image_cnts]
TRIGGER_DUR:     0.512 [sec] 
TRIGGER_INDEX:   124     E_range: 25-100 keV
BKG_INTEN:       33925 [cnts]
BKG_TIME:        4965.29 SOD {01:22:45.29} UT
BKG_DUR:         8 [sec]
GRB_DATE:        14565 TJD;   100 DOY;   08/04/09
GRB_TIME:        4977.58 SOD {01:22:57.58} UT
GRB_PHI:         -146.27 [deg]
GRB_THETA:        39.90 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     19.84 [sigma]
IMAGE_SIGNIF:    14.13 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +2 +12  +0  +0 -40  +1 
SUN_POSTN:        18.07d {+01h 12m 16s}   +7.66d {+07d 39' 23"}
SUN_DIST:         65.96 [deg]   Sun_angle= -4.4 [hr] (East of Sun)
MOON_POSTN:       56.57d {+03h 46m 17s}  +25.11d {+25d 06' 25"}
MOON_DIST:        33.39 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      199.64,-13.96 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       84.06,-18.24 [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 = 227.27,12.67 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 09 Apr 08 01:24:28 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     308812,   Seg_Num: 0
POINT_RA:         84.349d {+05h 37m 24s} (J2000)
POINT_DEC:        +5.085d {+05d 05' 06"} (J2000)
IMG_START_DATE:  14565 TJD;   100 DOY;   08/04/09
IMG_START_TIME:  5061.61 SOD {01:24:21.61} UT,   84.0 [sec] since BAT Trigger Time
COUNTS:          45    Min_needed= 20
STD_DEV:         0.00   Max_StdDev_for_Good=28.44 [arcsec]
PH2_ITER:        4    Max_iter_allowed= 4
ERROR_CODE:      2
COMMENTS:        SWIFT-XRT Nack Position.  
COMMENTS:        Algorithm did not converge; too many interations.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 09 Apr 08 01:26:59 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     308812,   Seg_Num: 0
POINT_RA:         84.349d {+05h 37m 24s} (J2000)
POINT_DEC:        +5.085d {+05d 05' 06"} (J2000)
POINT_ROLL:      276.117d
IMG_START_DATE:  14565 TJD;   100 DOY;   08/04/09
IMG_START_TIME:  5063.86 SOD {01:24:23.86} UT,   86.3 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.721
N_STARS:         56
X_OFFSET:        578 [pixels]
Y_OFFSET:        468 [pixels]
X_MAX:           1537 [pixels]
Y_MAX:           1427 [pixels]
DET_THRESH:      14
PHOTO_THRESH:    7
SL_URL:          sw00308812000msufc0086.fits
SUN_POSTN:        18.07d {+01h 12m 16s}   +7.66d {+07d 39' 27"}
SUN_DIST:         65.97 [deg]   Sun_angle= -4.4 [hr] (East of Sun)
MOON_POSTN:       56.61d {+03h 46m 27s}  +25.12d {+25d 06' 56"}
MOON_DIST:        33.37 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      199.64,-13.95 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       84.07,-18.24 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 09 Apr 08 01:27:09 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     308812,   Seg_Num: 0
GRB_RA:           84.333d {+05h 37m 20s} (J2000),
                  84.443d {+05h 37m 46s} (current),
                  83.668d {+05h 34m 40s} (1950)
GRB_DEC:          +5.085d {+05d 05' 07"} (J2000),
                  +5.090d {+05d 05' 23"} (current),
                  +5.056d {+05d 03' 22"} (1950)
GRB_DATE:        14565 TJD;   100 DOY;   08/04/09
GRB_TIME:        4977.58 SOD {01:22:57.58} UT
TRIGGER_INDEX:   124
GRB_PHI:         -146.27 [deg]
GRB_THETA:        39.90 [deg]
DELTA_TIME:      51.00 [sec]
TRIGGER_DUR:     0.512 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     19.84 [sigma]
IMAGE_SIGNIF:    14.13 [sigma]
LC_URL:          sw00308812000msb.lc
SUN_POSTN:        18.07d {+01h 12m 17s}   +7.66d {+07d 39' 27"}
SUN_DIST:         65.96 [deg]   Sun_angle= -4.4 [hr] (East of Sun)
MOON_POSTN:       56.61d {+03h 46m 27s}  +25.12d {+25d 06' 57"}
MOON_DIST:        33.36 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      199.64,-13.96 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       84.06,-18.24 [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 = 227.27,12.67 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 09 Apr 08 01:27:34 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     308812,   Seg_Num: 0
POINT_RA:         84.349d {+05h 37m 24s} (J2000)
POINT_DEC:        +5.085d {+05d 05' 06"} (J2000)
POINT_ROLL:      276.117d
IMG_START_DATE:  14565 TJD;   100 DOY;   08/04/09
IMG_START_TIME:  5063.86 SOD {01:24:23.86} UT,   86.3 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.721
N_STARS:         56
X_OFFSET:        578 [pixels]
Y_OFFSET:        468 [pixels]
X_MAX:           1537 [pixels]
Y_MAX:           1427 [pixels]
DET_THRESH:      14
PHOTO_THRESH:    7
SL_URL:          sw00308812000msufc0086.fits
SUN_POSTN:        18.07d {+01h 12m 17s}   +7.66d {+07d 39' 28"}
SUN_DIST:         65.97 [deg]   Sun_angle= -4.4 [hr] (East of Sun)
MOON_POSTN:       56.62d {+03h 46m 28s}  +25.12d {+25d 07' 00"}
MOON_DIST:        33.37 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      199.64,-13.95 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       84.07,-18.24 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 09 Apr 08 01:28:44 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     308812,   Seg_Num: 0
POINT_RA:         84.349d {+05h 37m 24s} (J2000)
POINT_DEC:        +5.085d {+05d 05' 06"} (J2000)
ROLL:            276.117d
IMG_START_DATE:  14565 TJD;   100 DOY;   08/04/09
IMG_START_TIME:  5063.86 SOD {01:24:23.86} UT,   86.3 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     229397066
X_OFFSET:        897 [pixels]
Y_OFFSET:        787 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1057
Y_GRB_POS:       947
BINNING_INDEX:   1
IM_URL:          sw00308812000msuni0086.fits
SUN_POSTN:        18.07d {+01h 12m 17s}   +7.66d {+07d 39' 29"}
SUN_DIST:         65.97 [deg]   Sun_angle= -4.4 [hr] (East of Sun)
MOON_POSTN:       56.63d {+03h 46m 32s}  +25.12d {+25d 07' 10"}
MOON_DIST:        33.36 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      199.64,-13.95 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       84.07,-18.24 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 09 Apr 08 01:29:09 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     308812,   Seg_Num: 0
POINT_RA:         84.349d {+05h 37m 24s} (J2000)
POINT_DEC:        +5.085d {+05d 05' 06"} (J2000)
ROLL:            276.117d
IMG_START_DATE:  14565 TJD;   100 DOY;   08/04/09
IMG_START_TIME:  5063.86 SOD {01:24:23.86} UT,   86.3 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     229397066
X_OFFSET:        897 [pixels]
Y_OFFSET:        787 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1057
Y_GRB_POS:       947
BINNING_INDEX:   1
IM_URL:          sw00308812000msuni0086.fits
SUN_POSTN:        18.07d {+01h 12m 17s}   +7.66d {+07d 39' 29"}
SUN_DIST:         65.97 [deg]   Sun_angle= -4.4 [hr] (East of Sun)
MOON_POSTN:       56.64d {+03h 46m 33s}  +25.12d {+25d 07' 13"}
MOON_DIST:        33.36 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      199.64,-13.95 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       84.07,-18.24 [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_sources_image.fits.gz file does not exist; skipping the attachment.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 09 Apr 08 01:38:34 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     308812,   Seg_Num: 0
POINT_RA:         84.352d {+05h 37m 24s} (J2000)
POINT_DEC:        +5.087d {+05d 05' 13"} (J2000)
POINT_ROLL:      276.118d
IMG_START_DATE:  14565 TJD;   100 DOY;   08/04/09
IMG_START_TIME:  5163.64 SOD {01:26:03.64} UT,   186.1 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        2.625
N_STARS:         120
X_OFFSET:        578 [pixels]
Y_OFFSET:        468 [pixels]
X_MAX:           1537 [pixels]
Y_MAX:           1427 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw00308812000msufc0186.fits
SUN_POSTN:        18.08d {+01h 12m 18s}   +7.66d {+07d 39' 38"}
SUN_DIST:         65.97 [deg]   Sun_angle= -4.4 [hr] (East of Sun)
MOON_POSTN:       56.74d {+03h 46m 58s}  +25.14d {+25d 08' 28"}
MOON_DIST:        33.29 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      199.64,-13.94 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       84.08,-18.24 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 09 Apr 08 01:39:04 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     308812,   Seg_Num: 0
POINT_RA:         84.352d {+05h 37m 24s} (J2000)
POINT_DEC:        +5.087d {+05d 05' 13"} (J2000)
POINT_ROLL:      276.118d
IMG_START_DATE:  14565 TJD;   100 DOY;   08/04/09
IMG_START_TIME:  5163.64 SOD {01:26:03.64} UT,   186.1 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        2.625
N_STARS:         120
X_OFFSET:        578 [pixels]
Y_OFFSET:        468 [pixels]
X_MAX:           1537 [pixels]
Y_MAX:           1427 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw00308812000msufc0186.fits
SUN_POSTN:        18.08d {+01h 12m 18s}   +7.66d {+07d 39' 38"}
SUN_DIST:         65.97 [deg]   Sun_angle= -4.4 [hr] (East of Sun)
MOON_POSTN:       56.75d {+03h 46m 59s}  +25.14d {+25d 08' 32"}
MOON_DIST:        33.29 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      199.64,-13.94 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       84.08,-18.24 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 09 Apr 08 01:39:11 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     308812,   Seg_Num: 0
GRB_RA:           84.3310d {+05h 37m 19.4s} (J2000),
                  84.4410d {+05h 37m 45.8s} (current),
                  83.6659d {+05h 34m 39.8s} (1950)
GRB_DEC:          +5.0846d {+05d 05' 04.5"} (J2000),
                  +5.0891d {+05d 05' 20.7"} (current),
                  +5.0555d {+05d 03' 19.7"} (1950)
GRB_ERROR:       3.2 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  14565 TJD;   100 DOY;   08/04/09
IMG_START_TIME:  5061.60 SOD {01:24:21.60} UT,   84.0 [sec] since BAT Trigger Time
TAM[0-3]:        327.61 237.19 261.35 242.66
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:        18.08d {+01h 12m 18s}   +7.66d {+07d 39' 38"}
SUN_DIST:         65.95 [deg]   Sun_angle= -4.4 [hr] (East of Sun)
MOON_POSTN:       56.75d {+03h 46m 59s}  +25.14d {+25d 08' 33"}
MOON_DIST:        33.27 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      199.63,-13.96 [deg] galactic lon,lat of the burst
ECL_COORDS:       84.05,-18.24 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        TAM values are not valid.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 09 Apr 08 01:40:02 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     308812,   Seg_Num: 0
POINT_RA:         84.352d {+05h 37m 24s} (J2000)
POINT_DEC:        +5.087d {+05d 05' 13"} (J2000)
ROLL:            276.118d
IMG_START_DATE:  14565 TJD;   100 DOY;   08/04/09
IMG_START_TIME:  5163.64 SOD {01:26:03.64} UT,   186.1 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     229397166
X_OFFSET:        897 [pixels]
Y_OFFSET:        787 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1057
Y_GRB_POS:       947
BINNING_INDEX:   1
IM_URL:          sw00308812000msuni0186.fits
SUN_POSTN:        18.08d {+01h 12m 18s}   +7.66d {+07d 39' 39"}
SUN_DIST:         65.97 [deg]   Sun_angle= -4.4 [hr] (East of Sun)
MOON_POSTN:       56.76d {+03h 47m 02s}  +25.14d {+25d 08' 40"}
MOON_DIST:        33.28 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      199.64,-13.94 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       84.08,-18.24 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 09 Apr 08 01:40:28 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     308812,   Seg_Num: 0
POINT_RA:         84.352d {+05h 37m 24s} (J2000)
POINT_DEC:        +5.087d {+05d 05' 13"} (J2000)
ROLL:            276.118d
IMG_START_DATE:  14565 TJD;   100 DOY;   08/04/09
IMG_START_TIME:  5163.64 SOD {01:26:03.64} UT,   186.1 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     229397166
X_OFFSET:        897 [pixels]
Y_OFFSET:        787 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1057
Y_GRB_POS:       947
BINNING_INDEX:   1
IM_URL:          sw00308812000msuni0186.fits
SUN_POSTN:        18.08d {+01h 12m 19s}   +7.66d {+07d 39' 40"}
SUN_DIST:         65.97 [deg]   Sun_angle= -4.4 [hr] (East of Sun)
MOON_POSTN:       56.76d {+03h 47m 03s}  +25.15d {+25d 08' 43"}
MOON_DIST:        33.28 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      199.64,-13.94 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       84.08,-18.24 [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_sources_image.fits.gz file does not exist; skipping the attachment.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 09 Apr 08 01:42:02 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     308812,   Seg_Num: 0
GRB_RA:           84.3302d {+05h 37m 19.2s} (J2000),
                  84.4402d {+05h 37m 45.6s} (current),
                  83.6651d {+05h 34m 39.6s} (1950)
GRB_DEC:          +5.0850d {+05d 05' 05.9"} (J2000),
                  +5.0895d {+05d 05' 22.2"} (current),
                  +5.0559d {+05d 03' 21.1"} (1950)
GRB_ERROR:       2.9 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  14565 TJD;   100 DOY;   08/04/09
IMG_START_TIME:  5073.00 SOD {01:24:33.00} UT,   95.4 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        18.08d {+01h 12m 19s}   +7.66d {+07d 39' 41"}
SUN_DIST:         65.94 [deg]   Sun_angle= -4.4 [hr] (East of Sun)
MOON_POSTN:       56.78d {+03h 47m 07s}  +25.15d {+25d 08' 56"}
MOON_DIST:        33.25 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      199.63,-13.96 [deg] galactic lon,lat of the burst
ECL_COORDS:       84.05,-18.24 [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

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 09 Apr 08 01:44:01 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     308812,   Seg_Num: 0
POINT_RA:         84.352d {+05h 37m 24s} (J2000)
POINT_DEC:        +5.087d {+05d 05' 14"} (J2000)
POINT_ROLL:      276.118d
IMG_START_DATE:  14565 TJD;   100 DOY;   08/04/09
IMG_START_TIME:  5853.34 SOD {01:37:33.34} UT,   875.8 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.854
N_STARS:         65
X_OFFSET:        578 [pixels]
Y_OFFSET:        468 [pixels]
X_MAX:           1537 [pixels]
Y_MAX:           1427 [pixels]
DET_THRESH:      14
PHOTO_THRESH:    7
SL_URL:          sw00308812000msufc0875.fits
SUN_POSTN:        18.08d {+01h 12m 19s}   +7.66d {+07d 39' 43"}
SUN_DIST:         65.96 [deg]   Sun_angle= -4.4 [hr] (East of Sun)
MOON_POSTN:       56.80d {+03h 47m 12s}  +25.15d {+25d 09' 12"}
MOON_DIST:        33.25 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      199.64,-13.94 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       84.08,-18.24 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 09 Apr 08 01:44:30 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     308812,   Seg_Num: 0
POINT_RA:         84.352d {+05h 37m 24s} (J2000)
POINT_DEC:        +5.087d {+05d 05' 14"} (J2000)
POINT_ROLL:      276.118d
IMG_START_DATE:  14565 TJD;   100 DOY;   08/04/09
IMG_START_TIME:  5853.34 SOD {01:37:33.34} UT,   875.8 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.854
N_STARS:         65
X_OFFSET:        578 [pixels]
Y_OFFSET:        468 [pixels]
X_MAX:           1537 [pixels]
Y_MAX:           1427 [pixels]
DET_THRESH:      14
PHOTO_THRESH:    7
SL_URL:          sw00308812000msufc0875.fits
SUN_POSTN:        18.08d {+01h 12m 19s}   +7.66d {+07d 39' 43"}
SUN_DIST:         65.96 [deg]   Sun_angle= -4.4 [hr] (East of Sun)
MOON_POSTN:       56.81d {+03h 47m 13s}  +25.15d {+25d 09' 16"}
MOON_DIST:        33.25 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      199.64,-13.94 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       84.08,-18.24 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 09 Apr 08 01:45:22 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     308812,   Seg_Num: 0
POINT_RA:         84.352d {+05h 37m 24s} (J2000)
POINT_DEC:        +5.087d {+05d 05' 14"} (J2000)
ROLL:            276.118d
IMG_START_DATE:  14565 TJD;   100 DOY;   08/04/09
IMG_START_TIME:  5853.34 SOD {01:37:33.34} UT,   875.8 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     229397856
X_OFFSET:        897 [pixels]
Y_OFFSET:        787 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1057
Y_GRB_POS:       947
BINNING_INDEX:   1
IM_URL:          sw00308812000msuni0875.fits
SUN_POSTN:        18.08d {+01h 12m 19s}   +7.66d {+07d 39' 44"}
SUN_DIST:         65.96 [deg]   Sun_angle= -4.4 [hr] (East of Sun)
MOON_POSTN:       56.82d {+03h 47m 16s}  +25.16d {+25d 09' 22"}
MOON_DIST:        33.24 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      199.64,-13.94 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       84.08,-18.24 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 09 Apr 08 01:45:44 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     308812,   Seg_Num: 0
POINT_RA:         84.352d {+05h 37m 24s} (J2000)
POINT_DEC:        +5.087d {+05d 05' 14"} (J2000)
POINT_ROLL:      276.118d
IMG_START_DATE:  14565 TJD;   100 DOY;   08/04/09
IMG_START_TIME:  5959.48 SOD {01:39:19.48} UT,   981.9 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        0.130
N_STARS:         18
X_OFFSET:        578 [pixels]
Y_OFFSET:        468 [pixels]
X_MAX:           1537 [pixels]
Y_MAX:           1427 [pixels]
DET_THRESH:      4
PHOTO_THRESH:    2
SL_URL:          sw00308812000msufc0981.fits
SUN_POSTN:        18.08d {+01h 12m 19s}   +7.66d {+07d 39' 44"}
SUN_DIST:         65.96 [deg]   Sun_angle= -4.4 [hr] (East of Sun)
MOON_POSTN:       56.82d {+03h 47m 17s}  +25.16d {+25d 09' 25"}
MOON_DIST:        33.24 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      199.64,-13.94 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       84.08,-18.24 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 09 Apr 08 01:45:51 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     308812,   Seg_Num: 0
POINT_RA:         84.352d {+05h 37m 24s} (J2000)
POINT_DEC:        +5.087d {+05d 05' 14"} (J2000)
ROLL:            276.118d
IMG_START_DATE:  14565 TJD;   100 DOY;   08/04/09
IMG_START_TIME:  5853.34 SOD {01:37:33.34} UT,   875.8 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     229397856
X_OFFSET:        897 [pixels]
Y_OFFSET:        787 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1057
Y_GRB_POS:       947
BINNING_INDEX:   1
IM_URL:          sw00308812000msuni0875.fits
SUN_POSTN:        18.08d {+01h 12m 19s}   +7.66d {+07d 39' 45"}
SUN_DIST:         65.96 [deg]   Sun_angle= -4.4 [hr] (East of Sun)
MOON_POSTN:       56.82d {+03h 47m 17s}  +25.16d {+25d 09' 26"}
MOON_DIST:        33.24 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      199.64,-13.94 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       84.08,-18.24 [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_sources_image.fits.gz file does not exist; skipping the attachment.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 09 Apr 08 01:46:12 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     308812,   Seg_Num: 0
POINT_RA:         84.352d {+05h 37m 24s} (J2000)
POINT_DEC:        +5.087d {+05d 05' 14"} (J2000)
POINT_ROLL:      276.118d
IMG_START_DATE:  14565 TJD;   100 DOY;   08/04/09
IMG_START_TIME:  5959.48 SOD {01:39:19.48} UT,   981.9 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        0.130
N_STARS:         18
X_OFFSET:        578 [pixels]
Y_OFFSET:        468 [pixels]
X_MAX:           1537 [pixels]
Y_MAX:           1427 [pixels]
DET_THRESH:      4
PHOTO_THRESH:    2
SL_URL:          sw00308812000msufc0981.fits
SUN_POSTN:        18.08d {+01h 12m 19s}   +7.66d {+07d 39' 45"}
SUN_DIST:         65.96 [deg]   Sun_angle= -4.4 [hr] (East of Sun)
MOON_POSTN:       56.82d {+03h 47m 18s}  +25.16d {+25d 09' 29"}
MOON_DIST:        33.23 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      199.64,-13.94 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       84.08,-18.24 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        If you have elected to receive attachments:  
COMMENTS:        The uvot_catalog_srclist.fits.gz file does not exist; skipping the attachment.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 09 Apr 08 01:46:35 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     308812,   Seg_Num: 0
POINT_RA:         84.352d {+05h 37m 24s} (J2000)
POINT_DEC:        +5.087d {+05d 05' 14"} (J2000)
ROLL:            276.118d
IMG_START_DATE:  14565 TJD;   100 DOY;   08/04/09
IMG_START_TIME:  5959.48 SOD {01:39:19.48} UT,   981.9 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     229397962
X_OFFSET:        897 [pixels]
Y_OFFSET:        787 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1057
Y_GRB_POS:       947
BINNING_INDEX:   1
IM_URL:          sw00308812000msuni0981.fits
SUN_POSTN:        18.08d {+01h 12m 19s}   +7.66d {+07d 39' 45"}
SUN_DIST:         65.96 [deg]   Sun_angle= -4.4 [hr] (East of Sun)
MOON_POSTN:       56.83d {+03h 47m 19s}  +25.16d {+25d 09' 32"}
MOON_DIST:        33.23 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      199.64,-13.94 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       84.08,-18.24 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 09 Apr 08 01:46:57 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     308812,   Seg_Num: 0
POINT_RA:         84.352d {+05h 37m 24s} (J2000)
POINT_DEC:        +5.087d {+05d 05' 14"} (J2000)
ROLL:            276.118d
IMG_START_DATE:  14565 TJD;   100 DOY;   08/04/09
IMG_START_TIME:  5959.48 SOD {01:39:19.48} UT,   981.9 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     229397962
X_OFFSET:        897 [pixels]
Y_OFFSET:        787 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1057
Y_GRB_POS:       947
BINNING_INDEX:   1
IM_URL:          sw00308812000msuni0981.fits
SUN_POSTN:        18.08d {+01h 12m 20s}   +7.66d {+07d 39' 46"}
SUN_DIST:         65.96 [deg]   Sun_angle= -4.4 [hr] (East of Sun)
MOON_POSTN:       56.83d {+03h 47m 20s}  +25.16d {+25d 09' 35"}
MOON_DIST:        33.23 [deg]
MOON_ILLUM:      12 [%]
GAL_COORDS:      199.64,-13.94 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       84.08,-18.24 [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_sources_image.fits.gz file does not exist; skipping the attachment.

GCN Circular #7573
S. T. Holland (CRESST/USRA/GSFC), W. H. Baumgartner (GSFC/UMBC), D. N. Burrows (PSU), J. R. Cummings (NASA/UMBC), J. A. Kennea (PSU), C. B. Markwardt (CRESST/GSFC/UMD), F. E. Marshall (NASA/GSFC), K. M. McLean (GSFC/UMD), K. L. Page (U Leicester), D. M. Palmer (LANL), R. L. C. Starling (U Leicester) and T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:
At 01:22:57 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 080409 (trigger=308812). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 84.333, +5.085 which is
```
   RA(J2000) = 05h 37m 20s
   Dec(J2000) = +05d 05' 07"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a double-peaked structure with a duration of about 10 sec. The peak count rate was ~5000 counts/sec (15-350 keV), at ~0.7 sec after the trigger.
The XRT began observing the field at 01:24:21.6 UT, 84.0 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source with an enhanced position: RA, Dec 84.33035, 5.08523 which is equivalent to:
```
  RA(J2000)  = 05h 37m 19.28s
  Dec(J2000) = +05d 05' 06.8"
```
with an uncertainty of 2.9 arcseconds (radius, 90% containment). This location is 9.5 arcseconds from the BAT onboard position, within the BAT error circle.
A power-law fit to a spectrum formed from promptly downlinked event data gives a column density in excess of the Galactic value (2.34e+21 cm^-2, Kalberla et al. 2005), with an excess column of 4.5 (+4.33/-3.19) x 10^21 cm^-2 (90% confidence). The relation of Grupe et al. (2007) implies that this burst has a redshift z<4.3, although high redshift fits to the absorbed XRT spectrum are possible if paired with an anomalously large column. A summary of the promptly downlinked data is given at http://www.swift.ac.uk/sper/308812/.
UVOT took a finding chart exposure of 95 seconds with the White (160-650 nm) filter starting 87 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 3-sigma upper limit is about 19.5 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.78 mag.
Burst Advocate for this burst is S. T. Holland (sholland AT milkyway.gsfc.nasa.gov). 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 Circular #7574
P. D'Avanzo, S. Covino, D. Malesani, D. Fugazza, L.A. Antonelli, L. Calzoletti, S. Campana, G. Chincarini, M.L. Conciatore, S. Cutini, V. D'Elia, F. D'Alessio, F. Fiore, P. Goldoni, D. Guetta, C. Guidorzi, G.L. Israel, E. Maiorano, N. Masetti, A. Melandri, E.J.A. Meurs, L. Nicastro, E. Palazzi, E. Pian, F. Piranomonte, S. Piranomonte, L. Stella, G. Stratta, G. Tagliaferri, G. Tosti, V. Testa, S.D. Vergani, and F. Vitali, report on behalf of the REM team:
The robotic 60-cm REM telescope located at La Silla (Chile) observed automatically the field of the GRB 080309 (Holland et al., GCN 7573) starting about 81 seconds after the burst. Airmass was large (about 2.9).
Preliminary photometry of our earliest images (R: 30 s, H: 50 s) reveal no new sources inside the XRT error circle down to 3sigma limiting magnitudes of H ~ 15.0 and R ~ 17.0.
GCN Circular #7575
P.A. Evans, M.R. Goad, J.P. Osborne and A.P. Beardmore (U. Leicester) report on behalf of the Swift-XRT team.
Using 91 s of overlapping XRT Photon Counting mode and UVOT data for GRB 080409, 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 = 84.32975, +5.08484 which is equivalent to:
```
RA (J2000): 05h 37m 19.14s
Dec (J2000): +05d 05' 05.4"
```
with an uncertainty of 2.0 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 http://www.swift.ac.uk/xrt_positions/Goad.pdf), the current algorithm is an extension of this method.
This circular was automatically generated, and is an official product of the Swift-XRT team.
GCN Circular #7578
R.L.C. Starling, P.A. Evans, K.L. Page (U. Leicester) and S.T. Holland (CRESST/USRA/GSFC) report, on behalf of the Swift XRT team:
We have analysed the first three orbits of Swift XRT data (5.8 ks of data from T0+96s to T0+1.29e4s) for GRB 080409 (Holland et al., GCN Circ. 7573). The enhanced position for the X-ray afterglow is given in Evans et al. (GCN Circ. 7575).
The light curve shows an initial increase with slope of alpha1~0.6 up to T~480s. The light curve then turns over to decay with a slope of alpha2=-0.8+/-0.1.
The Photon Counting mode spectrum collected from the first three orbits can be fit with an absorbed power law of photon index Gamma=2.2+0.5/-0.7 and a total absorbing column of NH=(5 +5/-4)e21 cm-2, exceeding the Galactic value of 2.4e21 cm-2. The 0.3-10 keV observed (unabsorbed) flux is 3.2e-12 (6.7e-12) erg/cm2/s, corresponding to a count rate of 5.8e-2 count/s and a count rate to flux conversion of 1 count/s = 5.6e-11 erg/cm2/s.
The predicted count rates at T0+24h and T0+48h are 6.8e-3 and 4.0e-3 count/s respectively, assuming the decay continues with alpha=-0.8.
This is an official product of the Swift XRT team.
GCN Circular #7579
Swift/UVOT began settled observations of the field of GRB 080409 starting 88s after the BAT trigger (Holland et al., GCN Circ 7573). We do not detect an optical/uv afterglow at the enhanced XRT position (Evans et al., GCN Circ. 7575) in the initial finding chart observations or subsequent summed images down to the following 3 sigma upper limits:
```
Filter  T_start T_stop  Exp.    Mag UL (3sig)
 	(s)	(s)	(s)
white   88      187     93      > 20.22
white   682     7079    494     > 21.16
v       188     587     393     > 19.45
v       721     12243   1099    > 20.03
b       667     676     412     > 20.42
u       642     661     432     > 20.13
uvw1    618     637     430     > 19.86
uvm2    593     12940   1070    > 20.23
uvw2    697     11330   1082    > 20.46
```
The above magnitudes are not corrected for the large Galactic extinction in the line of sight to GRB 080409, corresponding to a reddening of E(B-V)=0.78 mag (Schlegel et al., 1998, ApJS, 500, 525). The photometry is on the UVOT flight system described in Poole et al. (2008, MNRAS, 383, 627).
GCN Circular #7582
D. Palmer (LANL), S. D. Barthelmy (GSFC), W. Baumgartner (GSFC/UMBC) , J. Cummings (GSFC/UMBC), E. Fenimore (LANL), N. Gehrels (GSFC), S. T. Holland (CRESST/USRA/GSFC), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), K. McLean (GSFC/UMD), A. Parsons (GSFC), T. Sakamoto (GSFC/UMBC), G. Sato (GSFC/ISAS), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC), T. Ukwatta (GWU) (i.e. the Swift-BAT team):
Using the data set from T-239 to T+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 080409 (trigger #308812) (Holland, et al., GCN Circ. 7573). The BAT ground-calculated position is RA, Dec = 84.304, 5.078 deg which is
```
   RA(J2000)  =  05h 37m 12.9s
   Dec(J2000) = +05d 04' 39.9"
```
with an uncertainty of 2.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 46%.
The mask-weighted light curve shows 3 well-separated peaks, at T-13, T+0, and T+10 sec, that are about 1, 2, and, 2 sec wide respectively. The first is much smaller than the others, the second at T+0 is the largest. T90 (15-350 keV) is 20.2 +- 8.0 sec (estimated error including systematics).
The time-averaged spectrum from T-13.1 to T+10.4 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 2.10 +- 0.20. The fluence in the 15-150 keV band is 6.1 +- 0.7 x 10^-07 erg/cm2. The 1-sec peak photon flux measured from T+0.00 sec in the 15-150 keV band is 3.7 +- 0.3 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/308812/BA/
GCN Report 128.1
GCN_Report 128.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_128_1.pdf by S.T. Holland at CRESST/USRA/GSFC titled: "Final Swift Observations of GRB 080409"

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Jochen Greiner, last update: 22-Apr-2008 [Disclaimer]