Gamma-ray Burst 081024

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Fri 24 Oct 08 05:53:14 UT
NOTICE_TYPE:     Fermi-GBM Alert
RECORD_NUM:      1
TRIGGER_NUM:     246520390
GRB_DATE:        14763 TJD;   298 DOY;   08/10/24
GRB_TIME:        21189.01 SOD {05:53:09.01} UT
TRIGGER_SIGNIF:  5.3 [sigma]
TRIGGER_DUR:     0.064 [sec]
E_RANGE:         3-4 [chan]   47-291 [keV]
ALGORITHM:       4
DETECTORS:       0,0,0, 0,0,0, 0,0,0, 0,1,1, 0,0,
COMMENTS:        Fermi-GBM Trigger Alert.
COMMENTS:        This trigger occurred at longitude,latitude = 268.92,-24.60 [deg].

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Fri 24 Oct 08 05:53:25 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      46
TRIGGER_NUM:     246520390
GRB_RA:           38.350d {+02h 33m 24s} (J2000),
                  38.507d {+02h 34m 02s} (current),
                  37.465d {+02h 29m 52s} (1950)
GRB_DEC:         +55.117d {+55d 06' 60"} (J2000),
                 +55.155d {+55d 09' 18"} (current),
                 +54.897d {+54d 53' 49"} (1950)
GRB_ERROR:       25.30 [deg radius, statistical only]
GRB_INTEN:       465 [cnts/sec]
DATA_SIGNIF:     6.20 [sigma]
INTEG_TIME:      0.128 [sec]
GRB_DATE:        14763 TJD;   298 DOY;   08/10/24
GRB_TIME:        21189.01 SOD {05:53:09.01} UT
GRB_PHI:         177.00 [deg]
GRB_THETA:       115.00 [deg]
HARD_RATIO:      0.49
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      78%  GRB
2nd_MOST_LIKELY:   7%  Cyg X-1
DETECTORS:       0,0,0, 0,0,0, 0,0,0, 0,1,1, 0,0,
SUN_POSTN:       209.05d {+13h 56m 13s}  -11.89d {-11d 53' 19"}
SUN_DIST:        136.10 [deg]   Sun_angle= 11.4 [hr] (West of Sun)
MOON_POSTN:      156.81d {+10h 27m 16s}   +7.82d {+07d 48' 58"}
MOON_DIST:        99.02 [deg]
MOON_ILLUM:      22 [%]
GAL_COORDS:      137.23, -4.90 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       55.47, 37.70 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 24 Oct 08 05:53:29 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     332516,   Seg_Num: 0
GRB_RA:           27.898d {+01h 51m 36s} (J2000),
                  28.053d {+01h 52m 13s} (current),
                  27.024d {+01h 48m 06s} (1950)
GRB_DEC:         +61.346d {+61d 20' 47"} (J2000),
                 +61.390d {+61d 23' 23"} (current),
                 +61.099d {+61d 05' 58"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       1204 [cnts]    Image_Peak=126 [image_cnts]
TRIGGER_DUR:     0.128 [sec] 
TRIGGER_INDEX:   122     E_range: 25-100 keV
BKG_INTEN:       32777 [cnts]
BKG_TIME:        21172.80 SOD {05:52:52.80} UT
BKG_DUR:         8 [sec]
GRB_DATE:        14763 TJD;   298 DOY;   08/10/24
GRB_TIME:        21188.86 SOD {05:53:08.86} UT
GRB_PHI:          -7.67 [deg]
GRB_THETA:        19.40 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     29.47 [sigma]
IMAGE_SIGNIF:    9.90 [sigma]
MERIT_PARAMS:     +1  +0  +0  -3  +2 +10  +0  +1 +64  +0 
SUN_POSTN:       209.05d {+13h 56m 13s}  -11.89d {-11d 53' 19"}
SUN_DIST:        130.49 [deg]   Sun_angle= -11.9 [hr] (East of Sun)
MOON_POSTN:      156.82d {+10h 27m 16s}   +7.82d {+07d 48' 57"}
MOON_DIST:       100.23 [deg]
MOON_ILLUM:      22 [%]
GAL_COORDS:      130.08, -0.69 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       52.63, 45.72 [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 = 264.81,1.75 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Fri 24 Oct 08 05:54:05 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      58
TRIGGER_NUM:     246520390
GRB_RA:           26.220d {+01h 44m 53s} (J2000),
                  26.377d {+01h 45m 31s} (current),
                  25.335d {+01h 41m 20s} (1950)
GRB_DEC:         +63.820d {+63d 49' 12"} (J2000),
                 +63.864d {+63d 51' 50"} (current),
                 +63.569d {+63d 34' 09"} (1950)
GRB_ERROR:       12.48 [deg radius, statistical only]
DATA_SIGNIF:     6.00 [sigma]
DATA_INTERVAL:   0.128 [sec]
GRB_DATE:        14763 TJD;   298 DOY;   08/10/24
GRB_TIME:        21189.01 SOD {05:53:09.01} UT
GRB_PHI:         185.00 [deg]
GRB_THETA:       123.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   1 (Gnd S/W Version number)
SUN_POSTN:       209.05d {+13h 56m 13s}  -11.89d {-11d 53' 20"}
SUN_DIST:        127.99 [deg]   Sun_angle= -11.8 [hr] (East of Sun)
MOON_POSTN:      156.82d {+10h 27m 17s}   +7.81d {+07d 48' 49"}
MOON_DIST:        99.27 [deg]
MOON_ILLUM:      22 [%]
GAL_COORDS:      128.79,  1.56 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       53.55, 48.23 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.
COMMENTS:        This Notice was ground-generated -- not flight-generated.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 24 Oct 08 05:54:33 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     332516,   Seg_Num: 0
POINT_RA:         27.901d {+01h 51m 36s} (J2000)
POINT_DEC:       +61.340d {+61d 20' 22"} (J2000)
IMG_START_DATE:  14763 TJD;   298 DOY;   08/10/24
IMG_START_TIME:  21261.12 SOD {05:54:21.12} UT,   72.3 [sec] since BAT Trigger Time
COUNTS:          13    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:     Fri 24 Oct 08 05:56:42 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     332516,   Seg_Num: 0
GRB_RA:           27.898d {+01h 51m 36s} (J2000),
                  28.053d {+01h 52m 13s} (current),
                  27.024d {+01h 48m 06s} (1950)
GRB_DEC:         +61.346d {+61d 20' 47"} (J2000),
                 +61.390d {+61d 23' 23"} (current),
                 +61.099d {+61d 05' 58"} (1950)
GRB_DATE:        14763 TJD;   298 DOY;   08/10/24
GRB_TIME:        21188.86 SOD {05:53:08.86} UT
TRIGGER_INDEX:   122
GRB_PHI:          -7.67 [deg]
GRB_THETA:        19.40 [deg]
DELTA_TIME:      -5.00 [sec]
TRIGGER_DUR:     0.128 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     29.47 [sigma]
IMAGE_SIGNIF:    9.90 [sigma]
LC_URL:          sw00332516000msb.lc
SUN_POSTN:       209.06d {+13h 56m 13s}  -11.89d {-11d 53' 22"}
SUN_DIST:        130.49 [deg]   Sun_angle= -11.9 [hr] (East of Sun)
MOON_POSTN:      156.84d {+10h 27m 22s}   +7.80d {+07d 48' 10"}
MOON_DIST:       100.25 [deg]
MOON_ILLUM:      22 [%]
GAL_COORDS:      130.08, -0.69 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       52.63, 45.72 [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 = 264.81,1.75 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 24 Oct 08 05:57:38 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     332516,   Seg_Num: 0
POINT_RA:         27.901d {+01h 51m 36s} (J2000)
POINT_DEC:       +61.339d {+61d 20' 21"} (J2000)
POINT_ROLL:      358.526d
IMG_START_DATE:  14763 TJD;   298 DOY;   08/10/24
IMG_START_TIME:  21265.63 SOD {05:54:25.63} UT,   76.8 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.875
N_STARS:         190
X_OFFSET:        528 [pixels]
Y_OFFSET:        539 [pixels]
X_MAX:           1487 [pixels]
Y_MAX:           1498 [pixels]
DET_THRESH:      14
PHOTO_THRESH:    7
SL_URL:          sw00332516000msufc0076.fits
SUN_POSTN:       209.06d {+13h 56m 14s}  -11.89d {-11d 53' 23"}
SUN_DIST:        130.50 [deg]   Sun_angle= -11.9 [hr] (East of Sun)
MOON_POSTN:      156.85d {+10h 27m 24s}   +7.80d {+07d 47' 56"}
MOON_DIST:       100.26 [deg]
MOON_ILLUM:      22 [%]
GAL_COORDS:      130.08, -0.69 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       52.63, 45.71 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 24 Oct 08 05:58:26 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     332516,   Seg_Num: 0
POINT_RA:         27.901d {+01h 51m 36s} (J2000)
POINT_DEC:       +61.339d {+61d 20' 21"} (J2000)
POINT_ROLL:      358.526d
IMG_START_DATE:  14763 TJD;   298 DOY;   08/10/24
IMG_START_TIME:  21265.63 SOD {05:54:25.63} UT,   76.8 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.875
N_STARS:         190
X_OFFSET:        528 [pixels]
Y_OFFSET:        539 [pixels]
X_MAX:           1487 [pixels]
Y_MAX:           1498 [pixels]
DET_THRESH:      14
PHOTO_THRESH:    7
SL_URL:          sw00332516000msufc0076.fits
SUN_POSTN:       209.06d {+13h 56m 14s}  -11.89d {-11d 53' 24"}
SUN_DIST:        130.50 [deg]   Sun_angle= -11.9 [hr] (East of Sun)
MOON_POSTN:      156.86d {+10h 27m 26s}   +7.80d {+07d 47' 45"}
MOON_DIST:       100.27 [deg]
MOON_ILLUM:      22 [%]
GAL_COORDS:      130.08, -0.69 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       52.63, 45.71 [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:     Fri 24 Oct 08 05:59:27 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     332516,   Seg_Num: 0
GRB_RA:           27.8741d {+01h 51m 29.78s} (J2000),
                  28.0291d {+01h 52m 06.98s} (current),
                  27.0002d {+01h 48m 00.04s} (1950)
GRB_DEC:         +61.3307d {+61d 19' 50.5"} (J2000),
                 +61.3740d {+61d 22' 26.5"} (current),
                 +61.0836d {+61d 05' 00.9"} (1950)
GRB_ERROR:       3.4 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  14763 TJD;   298 DOY;   08/10/24
IMG_START_TIME:  21293.00 SOD {05:54:53.00} UT,   104.1 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       209.06d {+13h 56m 14s}  -11.89d {-11d 53' 25"}
SUN_DIST:        130.51 [deg]   Sun_angle= -11.9 [hr] (East of Sun)
MOON_POSTN:      156.86d {+10h 27m 28s}   +7.79d {+07d 47' 30"}
MOON_DIST:       100.29 [deg]
MOON_ILLUM:      22 [%]
GAL_COORDS:      130.07, -0.71 [deg] galactic lon,lat of the burst
ECL_COORDS:       52.61, 45.71 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        TAM values, flux and significance fields are not valid  
COMMENTS:        This position was automatically generated on the ground using  
COMMENTS:        Photon Counting data telemetered via TDRSS (SPER data).  
COMMENTS:        See http://www.swift.ac.uk/sper/docs.php for details.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 24 Oct 08 06:00:22 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     332516,   Seg_Num: 0
POINT_RA:         27.901d {+01h 51m 36s} (J2000)
POINT_DEC:       +61.339d {+61d 20' 21"} (J2000)
ROLL:            358.526d
IMG_START_DATE:  14763 TJD;   298 DOY;   08/10/24
IMG_START_TIME:  21265.63 SOD {05:54:25.63} UT,   76.8 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     246520468
X_OFFSET:        847 [pixels]
Y_OFFSET:        858 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1007
Y_GRB_POS:       1018
BINNING_INDEX:   1
IM_URL:          sw00332516000msuni0076.fits
SUN_POSTN:       209.06d {+13h 56m 14s}  -11.89d {-11d 53' 25"}
SUN_DIST:        130.50 [deg]   Sun_angle= -11.9 [hr] (East of Sun)
MOON_POSTN:      156.87d {+10h 27m 29s}   +7.79d {+07d 47' 16"}
MOON_DIST:       100.28 [deg]
MOON_ILLUM:      22 [%]
GAL_COORDS:      130.08, -0.69 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       52.63, 45.71 [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:     Fri 24 Oct 08 06:00:37 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     332516,   Seg_Num: 0
POINT_RA:         27.901d {+01h 51m 36s} (J2000)
POINT_DEC:       +61.339d {+61d 20' 21"} (J2000)
ROLL:            358.526d
IMG_START_DATE:  14763 TJD;   298 DOY;   08/10/24
IMG_START_TIME:  21265.63 SOD {05:54:25.63} UT,   76.8 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     246520468
X_OFFSET:        847 [pixels]
Y_OFFSET:        858 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1007
Y_GRB_POS:       1018
BINNING_INDEX:   1
IM_URL:          sw00332516000msuni0076.fits
SUN_POSTN:       209.06d {+13h 56m 14s}  -11.89d {-11d 53' 26"}
SUN_DIST:        130.50 [deg]   Sun_angle= -11.9 [hr] (East of Sun)
MOON_POSTN:      156.87d {+10h 27m 30s}   +7.79d {+07d 47' 12"}
MOON_DIST:       100.28 [deg]
MOON_ILLUM:      22 [%]
GAL_COORDS:      130.08, -0.69 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       52.63, 45.71 [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:     Fri 24 Oct 08 06:05:55 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     332516,   Seg_Num: 0
POINT_RA:         27.896d {+01h 51m 35s} (J2000)
POINT_DEC:       +61.339d {+61d 20' 21"} (J2000)
POINT_ROLL:      358.521d
IMG_START_DATE:  14763 TJD;   298 DOY;   08/10/24
IMG_START_TIME:  21423.59 SOD {05:57:03.59} UT,   234.7 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.820
N_STARS:         190
X_OFFSET:        288 [pixels]
Y_OFFSET:        299 [pixels]
X_MAX:           1727 [pixels]
Y_MAX:           1738 [pixels]
DET_THRESH:      8
PHOTO_THRESH:    3
SL_URL:          sw00332516000msufc0234.fits
SUN_POSTN:       209.06d {+13h 56m 15s}  -11.89d {-11d 53' 30"}
SUN_DIST:        130.50 [deg]   Sun_angle= -11.9 [hr] (East of Sun)
MOON_POSTN:      156.92d {+10h 27m 40s}   +7.77d {+07d 45' 55"}
MOON_DIST:       100.32 [deg]
MOON_ILLUM:      22 [%]
GAL_COORDS:      130.08, -0.70 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       52.62, 45.71 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 24 Oct 08 06:06:45 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     332516,   Seg_Num: 0
POINT_RA:         27.896d {+01h 51m 35s} (J2000)
POINT_DEC:       +61.339d {+61d 20' 21"} (J2000)
POINT_ROLL:      358.521d
IMG_START_DATE:  14763 TJD;   298 DOY;   08/10/24
IMG_START_TIME:  21423.59 SOD {05:57:03.59} UT,   234.7 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.820
N_STARS:         190
X_OFFSET:        288 [pixels]
Y_OFFSET:        299 [pixels]
X_MAX:           1727 [pixels]
Y_MAX:           1738 [pixels]
DET_THRESH:      8
PHOTO_THRESH:    3
SL_URL:          sw00332516000msufc0234.fits
SUN_POSTN:       209.06d {+13h 56m 15s}  -11.89d {-11d 53' 31"}
SUN_DIST:        130.50 [deg]   Sun_angle= -11.9 [hr] (East of Sun)
MOON_POSTN:      156.93d {+10h 27m 42s}   +7.76d {+07d 45' 42"}
MOON_DIST:       100.33 [deg]
MOON_ILLUM:      22 [%]
GAL_COORDS:      130.08, -0.70 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       52.62, 45.71 [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:     Fri 24 Oct 08 06:07:40 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     332516,   Seg_Num: 0
POINT_RA:         27.896d {+01h 51m 35s} (J2000)
POINT_DEC:       +61.339d {+61d 20' 21"} (J2000)
ROLL:            358.521d
IMG_START_DATE:  14763 TJD;   298 DOY;   08/10/24
IMG_START_TIME:  21423.59 SOD {05:57:03.59} UT,   234.7 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     246520626
X_OFFSET:        847 [pixels]
Y_OFFSET:        858 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1007
Y_GRB_POS:       1018
BINNING_INDEX:   1
IM_URL:          sw00332516000msuni0234.fits
SUN_POSTN:       209.06d {+13h 56m 15s}  -11.89d {-11d 53' 32"}
SUN_DIST:        130.50 [deg]   Sun_angle= -11.9 [hr] (East of Sun)
MOON_POSTN:      156.93d {+10h 27m 44s}   +7.76d {+07d 45' 29"}
MOON_DIST:       100.34 [deg]
MOON_ILLUM:      22 [%]
GAL_COORDS:      130.08, -0.70 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       52.62, 45.71 [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:     Fri 24 Oct 08 06:08:08 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     332516,   Seg_Num: 0
POINT_RA:         27.896d {+01h 51m 35s} (J2000)
POINT_DEC:       +61.339d {+61d 20' 21"} (J2000)
ROLL:            358.521d
IMG_START_DATE:  14763 TJD;   298 DOY;   08/10/24
IMG_START_TIME:  21423.59 SOD {05:57:03.59} UT,   234.7 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     246520626
X_OFFSET:        847 [pixels]
Y_OFFSET:        858 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1007
Y_GRB_POS:       1018
BINNING_INDEX:   1
IM_URL:          sw00332516000msuni0234.fits
SUN_POSTN:       209.06d {+13h 56m 15s}  -11.89d {-11d 53' 32"}
SUN_DIST:        130.50 [deg]   Sun_angle= -11.9 [hr] (East of Sun)
MOON_POSTN:      156.94d {+10h 27m 45s}   +7.76d {+07d 45' 22"}
MOON_DIST:       100.34 [deg]
MOON_ILLUM:      22 [%]
GAL_COORDS:      130.08, -0.70 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       52.62, 45.71 [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:     Fri 24 Oct 08 06:11:06 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     332516,   Seg_Num: 0
POINT_RA:         27.895d {+01h 51m 35s} (J2000)
POINT_DEC:       +61.339d {+61d 20' 21"} (J2000)
POINT_ROLL:      358.521d
IMG_START_DATE:  14763 TJD;   298 DOY;   08/10/24
IMG_START_TIME:  22049.26 SOD {06:07:29.26} UT,   860.4 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.799
N_STARS:         190
X_OFFSET:        288 [pixels]
Y_OFFSET:        299 [pixels]
X_MAX:           1727 [pixels]
Y_MAX:           1738 [pixels]
DET_THRESH:      14
PHOTO_THRESH:    7
SL_URL:          sw00332516000msufc0860.fits
SUN_POSTN:       209.07d {+13h 56m 16s}  -11.89d {-11d 53' 35"}
SUN_DIST:        130.51 [deg]   Sun_angle= -11.9 [hr] (East of Sun)
MOON_POSTN:      156.96d {+10h 27m 51s}   +7.74d {+07d 44' 38"}
MOON_DIST:       100.36 [deg]
MOON_ILLUM:      22 [%]
GAL_COORDS:      130.08, -0.70 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       52.62, 45.71 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 24 Oct 08 06:11:45 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     332516,   Seg_Num: 0
POINT_RA:         27.895d {+01h 51m 35s} (J2000)
POINT_DEC:       +61.339d {+61d 20' 21"} (J2000)
POINT_ROLL:      358.521d
IMG_START_DATE:  14763 TJD;   298 DOY;   08/10/24
IMG_START_TIME:  22049.26 SOD {06:07:29.26} UT,   860.4 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.799
N_STARS:         190
X_OFFSET:        288 [pixels]
Y_OFFSET:        299 [pixels]
X_MAX:           1727 [pixels]
Y_MAX:           1738 [pixels]
DET_THRESH:      14
PHOTO_THRESH:    7
SL_URL:          sw00332516000msufc0860.fits
SUN_POSTN:       209.07d {+13h 56m 16s}  -11.89d {-11d 53' 35"}
SUN_DIST:        130.51 [deg]   Sun_angle= -11.9 [hr] (East of Sun)
MOON_POSTN:      156.97d {+10h 27m 52s}   +7.74d {+07d 44' 29"}
MOON_DIST:       100.36 [deg]
MOON_ILLUM:      22 [%]
GAL_COORDS:      130.08, -0.70 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       52.62, 45.71 [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:     Fri 24 Oct 08 06:12:13 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     332516,   Seg_Num: 0
GRB_RA:           27.8745d {+01h 51m 29.88s} (J2000),
                  28.0295d {+01h 52m 07.08s} (current),
                  27.0006d {+01h 48m 00.13s} (1950)
GRB_DEC:         +61.3316d {+61d 19' 53.7"} (J2000),
                 +61.3749d {+61d 22' 29.7"} (current),
                 +61.0845d {+61d 05' 04.2"} (1950)
GRB_ERROR:       2.3 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  14763 TJD;   298 DOY;   08/10/24
IMG_START_TIME:  21293.00 SOD {05:54:53.00} UT,   104.1 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       209.07d {+13h 56m 16s}  -11.89d {-11d 53' 36"}
SUN_DIST:        130.51 [deg]   Sun_angle= -11.9 [hr] (East of Sun)
MOON_POSTN:      156.97d {+10h 27m 53s}   +7.74d {+07d 44' 22"}
MOON_DIST:       100.38 [deg]
MOON_ILLUM:      22 [%]
GAL_COORDS:      130.07, -0.70 [deg] galactic lon,lat of the burst
ECL_COORDS:       52.61, 45.71 [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:     Fri 24 Oct 08 06:13:15 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     332516,   Seg_Num: 0
POINT_RA:         27.895d {+01h 51m 35s} (J2000)
POINT_DEC:       +61.339d {+61d 20' 21"} (J2000)
ROLL:            358.521d
IMG_START_DATE:  14763 TJD;   298 DOY;   08/10/24
IMG_START_TIME:  22049.26 SOD {06:07:29.26} UT,   860.4 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     246521252
X_OFFSET:        847 [pixels]
Y_OFFSET:        858 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1007
Y_GRB_POS:       1018
BINNING_INDEX:   1
IM_URL:          sw00332516000msuni0860.fits
SUN_POSTN:       209.07d {+13h 56m 16s}  -11.89d {-11d 53' 37"}
SUN_DIST:        130.51 [deg]   Sun_angle= -11.9 [hr] (East of Sun)
MOON_POSTN:      156.98d {+10h 27m 55s}   +7.74d {+07d 44' 07"}
MOON_DIST:       100.37 [deg]
MOON_ILLUM:      22 [%]
GAL_COORDS:      130.08, -0.70 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       52.62, 45.71 [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:     Fri 24 Oct 08 06:13:43 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     332516,   Seg_Num: 0
POINT_RA:         27.895d {+01h 51m 35s} (J2000)
POINT_DEC:       +61.339d {+61d 20' 21"} (J2000)
ROLL:            358.521d
IMG_START_DATE:  14763 TJD;   298 DOY;   08/10/24
IMG_START_TIME:  22049.26 SOD {06:07:29.26} UT,   860.4 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     246521252
X_OFFSET:        847 [pixels]
Y_OFFSET:        858 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1007
Y_GRB_POS:       1018
BINNING_INDEX:   1
IM_URL:          sw00332516000msuni0860.fits
SUN_POSTN:       209.07d {+13h 56m 16s}  -11.89d {-11d 53' 37"}
SUN_DIST:        130.51 [deg]   Sun_angle= -11.9 [hr] (East of Sun)
MOON_POSTN:      156.98d {+10h 27m 56s}   +7.73d {+07d 43' 60"}
MOON_DIST:       100.38 [deg]
MOON_ILLUM:      22 [%]
GAL_COORDS:      130.08, -0.70 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       52.62, 45.71 [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 #8398
G. Stratta (ASDC), W. H. Baumgartner (GSFC/UMBC), N. Gehrels (NASA/GSFC), E. A. Hoversten (PSU), C. B. Markwardt (CRESST/GSFC/UMD), M. Perri (ASDC) and L. Vetere (PSU) report on behalf of the Swift Team:
At 05:53:08 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 081024 (trigger=332516). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 27.898, +61.346 which is
```
   RA(J2000) = 01h 51m 36s
   Dec(J2000) = +61d 20' 47"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a short hard peak with a duration of about 0.3 sec at T+0 with a short precursor peak at T-2.5 seconds. The peak count rate was ~6,000 counts/sec (15-350 keV), at ~0 sec after the trigger.
The XRT began observing the field at 05:54:21.1 UT, 72.3 seconds after the BAT trigger. Using promptly downlinked data we find a fading, uncatalogued X-ray source with an enhanced position: RA, Dec 27.8745, 61.3317 which is equivalent to:
```
   RA(J2000)  = 01h 51m 29.88s
   Dec(J2000) = +61d 19' 54.1"
```
with an uncertainty of 2.3 arcseconds (radius, 90% containment). This location is 65 arcseconds from the BAT onboard position, within the BAT error circle. This position may be improved as more data are received; the latest position is available at http://www.swift.ac.uk/sper.
A power-law fit to a spectrum formed from promptly downlinked event data gives a column density consistent with the Galactic value of 7.71e+21 cm^-2 (Kalberla et al. 2005).
UVOT took a finding chart exposure of nominal 150 seconds with the White (160-650 nm) filter starting 76 seconds after the BAT trigger. No afterglow candidate has been found in the initial data products. Image catalog data are not available at this time. The 8'x8' region for the list of sources generated on-board covers 100% of the BAT error circle. The list of sources is typically complete to about 18 mag. No correction has been made for the large, but uncertain extinction expected.
This appears to be a short hard GRB with a precursor and a fading X-ray afterglow. We note that the position in galactic coordinates is l=130deg, b=-0.7 deg. It is not impossible that this is a galactic transient or even an SGR.
Burst Advocate for this burst is G. Stratta (giulia.stratta AT asdc.asi.it). 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 #8399
B. E. Schaefer (Louisiana State), E.S. Rykoff (UCSB), H. Swan (U Mich), W. Rujopakarn (Steward), report on behalf of the ROTSE collaboration:
ROTSE-IIIb, located at McDonald Observatory, Texas, responded to GRB 081024A (Swift trigger 332516; G. Stratta, GCN 8398), producing images beginning 9.1 s after the GCN notice time. An automated response took the first image at 05:53:37.2 UT, 28.4 s after the burst, under excellent conditions. We took 10 5-sec, 10 20-sec and 40 60-sec exposures. These unfiltered images are calibrated relative to USNO A2.0 (R). Imaging is on going.
Comparison to the DSS (second epoch) reveals no new sources within the 3-sigma Swift/BAT error circle or the XRT error circle, for both single images and coadding into sets of 10; however, we are limited as the field is somewhat crowded. Individual images have limiting magnitudes ranging from 16.1-17.1; we set the following specific limits.
```
start UT       end UT      t_exp(s)   mlim   t_start-tGRB(s)  Coadd?
--------------------------------------------------------------------
05:53:37.1   05:53:42.1         5     16.2           28.3       N
05:54:57.0   05:59:37.7       280     17.2          108.2       Y
```
GCN Circular #8400
G. G. Williams (MMTO) and P. A. Milne (Steward Observatory), on behalf of the Super-LOTIS Collaboration, report:
The robotic 0.6-m Super-LOTIS telescope began observing the error box of GRB 081024 (Swift Trigger 332516, Stratta et al. GCN 8398) at 05:53:49.9 UT, 41.9 seconds after the trigger. Our initial observations include 5 x 10s exposures, 5 x 20s exposures, and 30 x 60s exposures, all in the R-band.
We do not detect any variable sources or afterglow candidates within the XRT error box in our earliest exposure to the following 3-sigma limiting magnitude determined from the nearby USNO-B1.0 star 1513-0063175 with R2=14.24:
```
t_start (UT)	exp t (s)	t_start-t_0 (s)	Limit
------------------------------------------------------------
05:53:49.9	10 		41.9 		R > 17.6
```
The value quoted above is not corrected for the expected Galactic extinction corresponding to a reddening of E(B-V)=1.64 mag in the direction of the burst (Schlegel et al. 1998).
Additional observations and analysis are ongoing.
GCN Circular #8401
W. Li, R. Chornock, and A. V. Filippenko, University of California at Berkeley, on behalf of the KAIT GRB team, report:
The robotic 0.8-m KAIT located at Lick Observatory responded to GRB 081024 (G. Stratta, GCN 8398) automatically and started the first image at 05:54:42 UT (94 seconds after the burst). A series of images were taken in the V, I, and clear filters. No new sources were detected within the Swift/XRT error circle in the KAIT images (single or stacked frames) when compared to the DSS II. We set the following specific limiting magnitude in a stacked unfiltered image (2s x 10; USNO B1 calibration):
```
start UT       end UT      t_exp(s)   mlim 
--------------------------------------------
05:54:42.0   05:55:16.0        20     18.8  
```
GCN Circular #8402
A. Melandri, M. Burgdorf, R.J. Smith, I.A. Steele, D.F. Bersier, C.G. Mundell, (Liverpool JMU), A. Gomboc (Ljubljana), C. Guidorzi (INAF-OAB) on behalf of a larger collaboration report:
On 2008 October 24 at 05:54:45 UT (~50 seconds after the GRB trigger) we observed the field of GRB 081024 (trigger = 332516, Stratta et al., GCN 8938) with the robotic 2m Faulkes Telescope North located in Hawaii.
Observations were performed on BVRi filters. We do not detect any fadind optical source within the XRT error circle (Stratta et al., GCN 8938) down to the following limits:
```
--------------------------------------------------
  Dt_mid    T_exp     Filter      Mag_lim
   [min]    [sec]
--------------------------------------------------
   2.25      30         R         > 21.4
  112.8     600         R         > 22.6
  136.2     600         I         > 21.2
--------------------------------------------------
```
Limiting magnitudes has been estimated using the R2 and I magnitudes of the USNOB-1 catalogue. The reported values are not corrected for the Galactic extinction.
GCN Circular #8403
A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team.
Using 1443 s of XRT Photon Counting mode data and 1 UVOT images for GRB 081024, 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 = 27.8738, +61.3314 which is equivalent to:
```
RA (J2000): 01h 51m 29.72s
Dec (J2000): +61d 19' 53.0"
```
with an uncertainty of 1.9 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 #8404
S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC/UMD), K. McLean (GSFC/UMD), D. M. Palmer (LANL), A. M. Parsons (GSFC), T. Sakamoto (GSFC/UMBC), G. Sato (ISAS), M. Stamatikos (GSFC/ORAU), G. Stratta (ASDC), J. Tueller (GSFC), T. N. 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 081024 (trigger #332516) (Stratta, et al., GCN Circ. 8398). The BAT ground-calculated position is RA, Dec = 27.891, 61.352 deg which is
```
  RA(J2000)  =  01h 51m 33.8s
  Dec(J2000) = +61d 21' 08.2"
```
with an uncertainty of 1.7 arcmin, (radius, sys+stat, 90% containment). This position is 1.3 arcmin from the enhanced XRT position (Beardmore et al. GCN Circ. 8403). The partial coding was 97%.
The mask-weighted lightcurve shows a slightly softer precursor peak about 0.05 sec long at T-1.7 sec, a peak about 0.3 seconds long at T-0.2 sec and the largest peak 0.1 seconds long at T0. T90 (15-350 keV) is 1.8 +- 0.6 sec (estimated error including systematics).
The time-averaged spectrum from T-1.7 to T+0.3 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.23 +- 0.21. The fluence in the 15-150 keV band is 1.2 +- 0.2 x 10-07 erg/cm2. The 1-sec peak photon flux measured from T-0.73 sec in the 15-150 keV band is 1.1 +- 0.1 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/332516/BA/
GCN Circular #8405
G. Stratta (ASDC) reports on behalf of the Swift-XRT team:
We have analysed the first orbit of the XRT data obtained for GRB 081024 (Stratta et al., GCN Circ. 8398). From T+78 s to T+105 s after the burst, data were collected in Windowed Timing mode and then XRT switched to Photon Counting mode. The Enhanced Swift-XRT position was given by Beardmore et al. in GCN Circ. 8403.
The 0.3-10 keV flux from T+78 s to T+355 s shows a very steep decay with a possible small re-brightening between ~T+145 s to ~T+205 s. Excluding the re-brightening and assuming a power law decay, the best fit decay index is alpha = 3.7 (+0.8,-0.5).
The spectrum of the WT data, with an integration time of 27s, can be modelled with a power-law model with photon index of 1.6 (+0.6,- 0.3). The total absorbing equivalent hydrogen column density is consistent with the Galactic one NH = 7.71E+21 cm^-2 (Kalberla et al. 2005). The observed (unabsorbed) 0.3-10 keV flux is 4.1(6.1)E-10 erg/cm^-2 s^-1
No source counts are detected after the first orbit, likely due to the very steep flux decay.
This is an official product of the Swift-XRT team.
GCN Circular #8406
M. De Pasquale (MSSL/UCL) and G. Stratta (ASDC) report on behalf of the Swift UVOT team.
The Swift UltraViolet/Optical Telescope (UVOT) began its finding chart exposure of GRB081024 (Swift BAT trigger number 332516, Stratta et al., GCN Circ. 8398), 77s after the trigger.
We do not detect any new source at the XRT position reported in GCN Circ. 8403 (Beardmore et al.) either in the finding chart nor in in successive coadded observations.
The magnitude 3 sigma upper limits for detecting GRB081024 at the XRT position are given below.
```
  Filter  Tstart(s)  Tstop(s)  Exp(s)  Magnitude
  wh        77          227      147      >20.8
  wh       516        13395     1258      >22.0
  v        565          758       39      >18.5
  v       1041         7298      490      >19.9
  b        491          856       58      >19.6
  b       1140        12771     1358      >21.4
  u        235          485      250      >20.1
  u        639        11859      807      >21.0
  uvw1     615         7615      436      >20.2
  uvm2     590         7503      529      >20.5
  uvw2     541         7093      529      >20.6
```
The values quoted above are on the UVOT Photometric System (Poole et al, 2008, MNRAS 383,627). They are not corrected for the unknown but expected large Galactic extinction in the direction of this burst.
GCN Circular #8419
Poonam Chandra (RMC) and Dale A. Frail (NRAO) report on behalf of the Caltech-NRAO-Carnegie GRB Collaboration:
"We used the Very Large Array to observe the field of view toward GRB 081024 (GCN 8398) at a frequency of 8.46 GHz at 2008 Oct. 25.27 UT.=20 The GRB radio afterglow is undetected and the peak radio flux at the=20 Swift XRT afterglow position (GCN 8403) is -36 =B1 52 uJy.
The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc."
GCN Report 174.1
GCN_Report 174.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_174_1.pdf by G. Stratta at ASDC titled: "Final Swift report on GRB 081024"

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Jochen Greiner, last update: 10-Nov-2008 [Disclaimer]