Gamma-ray Burst 060805

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 05 Aug 06 04:48:44 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     222683,   Seg_Num: 0
GRB_RA:          220.919d {+14h 43m 41s} (J2000),
                 220.998d {+14h 43m 60s} (current),
                 220.319d {+14h 41m 17s} (1950)
GRB_DEC:         +12.592d {+12d 35' 32"} (J2000),
                 +12.565d {+12d 33' 53"} (current),
                 +12.804d {+12d 48' 13"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       18231 [cnts]    Image_Peak=411 [image_cnts]
TRIGGER_DUR:     4.096 [sec] 
TRIGGER_INDEX:   448     E_range: 15-50 keV
BKG_INTEN:       162520 [cnts]
BKG_TIME:        17214.63 SOD {04:46:54.63} UT
BKG_DUR:         40 [sec]
GRB_DATE:        13952 TJD;   217 DOY;   06/08/05
GRB_TIME:        17269.16 SOD {04:47:49.16} UT
GRB_PHI:         104.68 [deg]
GRB_THETA:         8.78 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     10.72 [sigma]
IMAGE_SIGNIF:    7.64 [sigma]
MERIT_PARAMS:     +1  +0  +0  +2  +1  +0  +0  +0 -13  +1 
SUN_POSTN:       135.11d {+09h 00m 27s}  +17.01d {+17d 00' 42"}
SUN_DIST:         82.49 [deg]   Sun_angle= -5.7 [hr] (East of Sun)
MOON_POSTN:      254.19d {+16h 56m 46s}  -27.77d {-27d 46' 00"}
MOON_DIST:        51.58 [deg]
MOON_ILLUM:      78 [%]
GAL_COORDS:        9.53, 59.99 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      214.12, 27.02 [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 = 224.74,17.98 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 05 Aug 06 04:50:36 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     222683,   Seg_Num: 0
POINT_RA:        220.905d {+14h 43m 37s} (J2000)
POINT_DEC:       +12.597d {+12d 35' 50"} (J2000)
IMG_START_DATE:  13952 TJD;   217 DOY;   06/08/05
IMG_START_TIME:  17362.31 SOD {04:49:22.31} UT,   93.2 [sec] since BAT Trigger Time
COUNTS:          2    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:     Sat 05 Aug 06 04:52:23 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     222683,   Seg_Num: 0
POINT_RA:        220.905d {+14h 43m 37s} (J2000)
POINT_DEC:       +12.597d {+12d 35' 50"} (J2000)
POINT_ROLL:      285.815d
IMG_START_DATE:  13952 TJD;   217 DOY;   06/08/05
IMG_START_TIME:  17365.37 SOD {04:49:25.37} UT,   96.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.546
N_STARS:         33
X_OFFSET:        363 [pixels]
Y_OFFSET:        604 [pixels]
X_MAX:           1322 [pixels]
Y_MAX:           1563 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00222683000msufc0096.fits
SUN_POSTN:       135.12d {+09h 00m 28s}  +17.01d {+17d 00' 39"}
SUN_DIST:         82.48 [deg]   Sun_angle= -5.7 [hr] (East of Sun)
MOON_POSTN:      254.23d {+16h 56m 55s}  -27.77d {-27d 46' 14"}
MOON_DIST:        51.62 [deg]
MOON_ILLUM:      78 [%]
GAL_COORDS:        9.52, 60.00 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      214.11, 27.02 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 05 Aug 06 04:52:53 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     222683,   Seg_Num: 0
GRB_RA:          220.919d {+14h 43m 41s} (J2000),
                 220.998d {+14h 43m 60s} (current),
                 220.319d {+14h 41m 17s} (1950)
GRB_DEC:         +12.592d {+12d 35' 32"} (J2000),
                 +12.565d {+12d 33' 53"} (current),
                 +12.804d {+12d 48' 13"} (1950)
GRB_DATE:        13952 TJD;   217 DOY;   06/08/05
GRB_TIME:        17269.16 SOD {04:47:49.16} UT
TRIGGER_INDEX:   448
GRB_PHI:         104.68 [deg]
GRB_THETA:         8.78 [deg]
DELTA_TIME:      -11.00 [sec]
TRIGGER_DUR:     4.096 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     10.72 [sigma]
IMAGE_SIGNIF:    7.64 [sigma]
LC_URL:          sw00222683000msb.lc
SUN_POSTN:       135.12d {+09h 00m 28s}  +17.01d {+17d 00' 39"}
SUN_DIST:         82.49 [deg]   Sun_angle= -5.7 [hr] (East of Sun)
MOON_POSTN:      254.24d {+16h 56m 57s}  -27.77d {-27d 46' 16"}
MOON_DIST:        51.61 [deg]
MOON_ILLUM:      78 [%]
GAL_COORDS:        9.53, 59.99 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      214.12, 27.02 [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 = 224.74,17.98 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 05 Aug 06 04:58:56 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     222683,   Seg_Num: 0
POINT_RA:        220.902d {+14h 43m 37s} (J2000)
POINT_DEC:       +12.598d {+12d 35' 55"} (J2000)
POINT_ROLL:      285.815d
IMG_START_DATE:  13952 TJD;   217 DOY;   06/08/05
IMG_START_TIME:  17471.13 SOD {04:51:11.13} UT,   202.0 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        1.522
N_STARS:         33
X_OFFSET:        363 [pixels]
Y_OFFSET:        604 [pixels]
X_MAX:           1322 [pixels]
Y_MAX:           1563 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00222683000msufc0201.fits
SUN_POSTN:       135.12d {+09h 00m 29s}  +17.01d {+17d 00' 35"}
SUN_DIST:         82.47 [deg]   Sun_angle= -5.7 [hr] (East of Sun)
MOON_POSTN:      254.30d {+16h 57m 12s}  -27.78d {-27d 46' 41"}
MOON_DIST:        51.67 [deg]
MOON_ILLUM:      78 [%]
GAL_COORDS:        9.52, 60.00 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      214.11, 27.02 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 05 Aug 06 04:59:50 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     222683,   Seg_Num: 0
POINT_RA:        220.902d {+14h 43m 37s} (J2000)
POINT_DEC:       +12.598d {+12d 35' 55"} (J2000)
POINT_ROLL:      285.815d
IMG_START_DATE:  13952 TJD;   217 DOY;   06/08/05
IMG_START_TIME:  17471.13 SOD {04:51:11.13} UT,   202.0 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        1.522
N_STARS:         33
X_OFFSET:        363 [pixels]
Y_OFFSET:        604 [pixels]
X_MAX:           1322 [pixels]
Y_MAX:           1563 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00222683000msufc0201.fits
SUN_POSTN:       135.12d {+09h 00m 29s}  +17.01d {+17d 00' 34"}
SUN_DIST:         82.47 [deg]   Sun_angle= -5.7 [hr] (East of Sun)
MOON_POSTN:      254.31d {+16h 57m 14s}  -27.78d {-27d 46' 44"}
MOON_DIST:        51.68 [deg]
MOON_ILLUM:      78 [%]
GAL_COORDS:        9.52, 60.00 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      214.11, 27.02 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 05 Aug 06 05:00:13 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     222683,   Seg_Num: 0
POINT_RA:        220.902d {+14h 43m 37s} (J2000)
POINT_DEC:       +12.598d {+12d 35' 55"} (J2000)
ROLL:            285.815d
IMG_START_DATE:  13952 TJD;   217 DOY;   06/08/05
IMG_START_TIME:  17471.13 SOD {04:51:11.13} UT,   202.0 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     176446272
X_OFFSET:        682 [pixels]
Y_OFFSET:        923 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       842
Y_GRB_POS:       1083
BINNING_INDEX:   1
IM_URL:          sw00222683000msuni0201.fits
SUN_POSTN:       135.12d {+09h 00m 29s}  +17.01d {+17d 00' 34"}
SUN_DIST:         82.47 [deg]   Sun_angle= -5.7 [hr] (East of Sun)
MOON_POSTN:      254.31d {+16h 57m 15s}  -27.78d {-27d 46' 46"}
MOON_DIST:        51.68 [deg]
MOON_ILLUM:      78 [%]
GAL_COORDS:        9.52, 60.00 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      214.11, 27.02 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 05 Aug 06 05:01:48 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     222683,   Seg_Num: 0
POINT_RA:        220.902d {+14h 43m 37s} (J2000)
POINT_DEC:       +12.598d {+12d 35' 55"} (J2000)
ROLL:            285.815d
IMG_START_DATE:  13952 TJD;   217 DOY;   06/08/05
IMG_START_TIME:  17471.13 SOD {04:51:11.13} UT,   202.0 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     176446272
X_OFFSET:        682 [pixels]
Y_OFFSET:        923 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       842
Y_GRB_POS:       1083
BINNING_INDEX:   1
IM_URL:          sw00222683000msuni0201.fits
SUN_POSTN:       135.12d {+09h 00m 29s}  +17.01d {+17d 00' 33"}
SUN_DIST:         82.47 [deg]   Sun_angle= -5.7 [hr] (East of Sun)
MOON_POSTN:      254.33d {+16h 57m 19s}  -27.78d {-27d 46' 52"}
MOON_DIST:        51.69 [deg]
MOON_ILLUM:      78 [%]
GAL_COORDS:        9.52, 60.00 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      214.11, 27.02 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 05 Aug 06 05:03:42 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     222683,   Seg_Num: 0
POINT_RA:        220.903d {+14h 43m 37s} (J2000)
POINT_DEC:       +12.598d {+12d 35' 54"} (J2000)
POINT_ROLL:      285.815d
IMG_START_DATE:  13952 TJD;   217 DOY;   06/08/05
IMG_START_TIME:  18125.41 SOD {05:02:05.41} UT,   856.2 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        0.321
N_STARS:         18
X_OFFSET:        363 [pixels]
Y_OFFSET:        604 [pixels]
X_MAX:           1322 [pixels]
Y_MAX:           1563 [pixels]
DET_THRESH:      6
PHOTO_THRESH:    2
SL_URL:          sw00222683000msufc0856.fits
SUN_POSTN:       135.12d {+09h 00m 30s}  +17.01d {+17d 00' 32"}
SUN_DIST:         82.47 [deg]   Sun_angle= -5.7 [hr] (East of Sun)
MOON_POSTN:      254.35d {+16h 57m 24s}  -27.78d {-27d 47' 00"}
MOON_DIST:        51.70 [deg]
MOON_ILLUM:      78 [%]
GAL_COORDS:        9.52, 60.00 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      214.11, 27.02 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 05 Aug 06 04:53:10 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     222683,   Seg_Num: 0
POINT_RA:        220.905d {+14h 43m 37s} (J2000)
POINT_DEC:       +12.597d {+12d 35' 50"} (J2000)
ROLL:            285.815d
IMG_START_DATE:  13952 TJD;   217 DOY;   06/08/05
IMG_START_TIME:  17365.37 SOD {04:49:25.37} UT,   96.2 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     176446166
X_OFFSET:        682 [pixels]
Y_OFFSET:        923 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       842
Y_GRB_POS:       1083
BINNING_INDEX:   1
IM_URL:          sw00222683000msuni0096.fits
SUN_POSTN:       135.12d {+09h 00m 28s}  +17.01d {+17d 00' 39"}
SUN_DIST:         82.48 [deg]   Sun_angle= -5.7 [hr] (East of Sun)
MOON_POSTN:      254.24d {+16h 56m 57s}  -27.77d {-27d 46' 17"}
MOON_DIST:        51.63 [deg]
MOON_ILLUM:      78 [%]
GAL_COORDS:        9.52, 60.00 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      214.11, 27.02 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 05 Aug 06 04:54:32 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     222683,   Seg_Num: 0
POINT_RA:        220.905d {+14h 43m 37s} (J2000)
POINT_DEC:       +12.597d {+12d 35' 50"} (J2000)
POINT_ROLL:      285.815d
IMG_START_DATE:  13952 TJD;   217 DOY;   06/08/05
IMG_START_TIME:  17365.37 SOD {04:49:25.37} UT,   96.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.546
N_STARS:         33
X_OFFSET:        363 [pixels]
Y_OFFSET:        604 [pixels]
X_MAX:           1322 [pixels]
Y_MAX:           1563 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00222683000msufc0096.fits
SUN_POSTN:       135.12d {+09h 00m 28s}  +17.01d {+17d 00' 38"}
SUN_DIST:         82.48 [deg]   Sun_angle= -5.7 [hr] (East of Sun)
MOON_POSTN:      254.25d {+16h 57m 01s}  -27.77d {-27d 46' 23"}
MOON_DIST:        51.64 [deg]
MOON_ILLUM:      78 [%]
GAL_COORDS:        9.52, 60.00 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      214.11, 27.02 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 05 Aug 06 04:54:44 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     222683,   Seg_Num: 0
POINT_RA:        220.905d {+14h 43m 37s} (J2000)
POINT_DEC:       +12.597d {+12d 35' 50"} (J2000)
ROLL:            285.815d
IMG_START_DATE:  13952 TJD;   217 DOY;   06/08/05
IMG_START_TIME:  17365.37 SOD {04:49:25.37} UT,   96.2 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     176446166
X_OFFSET:        682 [pixels]
Y_OFFSET:        923 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       842
Y_GRB_POS:       1083
BINNING_INDEX:   1
IM_URL:          sw00222683000msuni0096.fits
SUN_POSTN:       135.12d {+09h 00m 28s}  +17.01d {+17d 00' 38"}
SUN_DIST:         82.48 [deg]   Sun_angle= -5.7 [hr] (East of Sun)
MOON_POSTN:      254.26d {+16h 57m 01s}  -27.77d {-27d 46' 24"}
MOON_DIST:        51.64 [deg]
MOON_ILLUM:      78 [%]
GAL_COORDS:        9.52, 60.00 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      214.11, 27.02 [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:     Sat 05 Aug 06 05:05:11 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     222683,   Seg_Num: 0
POINT_RA:        220.903d {+14h 43m 37s} (J2000)
POINT_DEC:       +12.598d {+12d 35' 54"} (J2000)
POINT_ROLL:      285.815d
IMG_START_DATE:  13952 TJD;   217 DOY;   06/08/05
IMG_START_TIME:  18125.41 SOD {05:02:05.41} UT,   856.2 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        0.321
N_STARS:         18
X_OFFSET:        363 [pixels]
Y_OFFSET:        604 [pixels]
X_MAX:           1322 [pixels]
Y_MAX:           1563 [pixels]
DET_THRESH:      6
PHOTO_THRESH:    2
SL_URL:          sw00222683000msufc0856.fits
SUN_POSTN:       135.12d {+09h 00m 30s}  +17.01d {+17d 00' 31"}
SUN_DIST:         82.47 [deg]   Sun_angle= -5.7 [hr] (East of Sun)
MOON_POSTN:      254.36d {+16h 57m 27s}  -27.79d {-27d 47' 06"}
MOON_DIST:        51.71 [deg]
MOON_ILLUM:      78 [%]
GAL_COORDS:        9.52, 60.00 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      214.11, 27.02 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN Circular #5398
H. Z. Ziaeepour (UCL-MSSL), S. D. Barthelmy (GSFC), J. R. Cummings (NASA/UMD), N. Gehrels (NASA/GSFC), C. Guidorzi (Univ Bicocca&INAF-OAB), J. A. Kennea (PSU), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC/UMD), F. E. Marshall (NASA/GSFC), K. M. McLean (LANL/UTD), K. L. Page (U Leicester), M. J. Page (UCL-MSSL), D. M. Palmer (LANL) and T. Sakamoto (NASA/ORAU) report on behalf of the Swift Team:
At 04:47:49 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 060805 (trigger=222683). Swift slewed immediately to the burst. The BAT on-board calculated location is RA,Dec 220.919, +12.592 {14h 43m 41s, +12d 35' 32"} (J2000) with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a single peak with a duration of about ~5 sec. The peak count rate was ~1500 counts/sec (15-350 keV), at ~0 sec after the trigger.
The XRT began taking data at 04:49:22 UT, 93 seconds after the BAT trigger. Although the XRT on-board centroid algorithm did not find a source in the image, ground analysis reveals a faint source at RA, Dec 14h 43m 43.59s, +12 35 11.8 (J2000) with an uncertainty of 5.9 arcsec.
UVOT took a finding chart exposure of 100 seconds with the white filter starting 97 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 18.0 mag. No correction has been made for the expected extinction of about 0.1 magnitudes.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 05 Aug 06 05:13:27 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     222683,   Seg_Num: 0
GRB_RA:          220.9316d {+14h 43m 43.5s} (J2000),
                 221.0107d {+14h 44m 02.5s} (current),
                 220.3319d {+14h 41m 19.6s} (1950)
GRB_DEC:         +12.5866d {+12d 35' 11.7"} (J2000),
                 +12.5589d {+12d 33' 32.0"} (current),
                 +12.7979d {+12d 47' 52.3"} (1950)
GRB_ERROR:       5.8 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       9.99e-12 [erg/cm2/sec]
GRB_SIGNIF:      4.00 [sigma]
IMG_START_DATE:  13952 TJD;   217 DOY;   06/08/05
IMG_START_TIME:  17362.31 SOD {04:49:22.31} UT,   93.2 [sec] since BAT Trigger Time
TAM[0-3]:        327.61 237.19 261.35 242.66
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       135.13d {+09h 00m 31s}  +17.01d {+17d 00' 25"}
SUN_DIST:         82.49 [deg]   Sun_angle= -5.7 [hr] (East of Sun)
MOON_POSTN:      254.45d {+16h 57m 48s}  -27.79d {-27d 47' 39"}
MOON_DIST:        51.75 [deg]
MOON_ILLUM:      78 [%]
GAL_COORDS:        9.53, 59.97 [deg] galactic lon,lat of the burst
ECL_COORDS:      214.14, 27.02 [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.   
COMMENTS:        This position was ground-generated.

GCN Circular #5399
Richard J. Cool (Arizona), Daniel J. Eisenstein (Arizona), David W. Hogg (NYU), Michael R. Blanton (NYU), David J. Schlegel (LBNL), J. Brinkmann (APO), Donald Q. Lamb (Chicago), Donald P. Schneider (PSU), and Daniel E. Vanden Berk (PSU) report:
The Sloan Digital Sky Survey (SDSS) imaged the field of burst GRB060805 prior to the burst. As these data should be useful as a pre-burst comparison and for calibrating photometry, we are supplying the images and photometry measurements for this GRB field to the community.
Data from the SDSS, including 5 FITS images, 3 JPGS, and 3 files of photometry and astrometry, are being placed at http://mizar.as.arizona.edu/~grb/public/GRB060805
We supply FITS images in each of the 5 SDSS bands of a 8'x8' region centered on the GRB position (ra=220.932 (14:43:43.6), dec=12.5866 (12:35:11.8); Swift-BAT TRIGGER 222683), as well as 3 gri color-composite JPGs (with different stretches). The units in the FITS images are nanomaggies per pixel. A pixel is 0.396 arcsec on a side. A nanomaggie is a flux-density unit equal to 10^-9 of a magnitude 0 source or, to the extent that SDSS is an AB system, 3.631e-6 Jy. The FITS images have WCS astrometric information.
In the file GRB060805_sdss.calstar.dat, we report photometry and astrometry of 379 bright stars (r<20.5) within 15' of the burst location. The magnitudes presented in this file are asinh magnitudes as are standard in the SDSS (Lupton 1999, AJ, 118, 1406). Beware that some of these stars are not well-detected in the u-band; use the errors and object flags to monitor data quality.
In the files GRB060805_sdss.objects_flux.dat and GRB060805_sdss.objects_magnitudes.dat, we report photometry of 1683 objects detected within 6' of the GRB position. We have removed saturated objects and objects with model magnitudes fainter than 23.0 in the r-band. The fluxes listed in GRB060805_sdss.objects_flux.dat are in nanomaggies while the magnitudes listed in GRB060805_sdss.objects_magnitudes.dat are asinh magnitudes.
All quantities reported are standard SDSS photometry, meaning that they are very close to AB zeropoints and magnitudes are quoted in asinh magnitudes. Photometric zeropoints are known to about 2% rms. None of the photometry is corrected for dust extinction. The Schlegel, Finkbeiner, and Davis (1998) predictions for this region are A_U=0.124 mag, A_g=0.092 mag, A_r = 0.066 mag, A_i=0.050 mag, and A_z=0.036 mag.
The file GRB060805_sdss.spectro.dat contains a list of the 8 objects with SDSS spectroscopy within 6 arcminutes of the GRB position. In addition to the redshift and 1-sigma error for each object, this file also lists the object spectroscopic classification.
SDSS astrometry is generally better than 0.1 arcsecond per coordinate. Users requiring high precision astrometry should take note that the SDSS astrometric system can differ from other systems such as those used in other notices; we have not checked the offsets in this region.
More detailed information pertaining to our SDSS GRB releases can be found in our initial data release paper (Cool et al. 2006, astro-ph/0601218). See the SDSS DR4 documentation for more details: http://www.sdss.org/dr5.
These data have been reduced using a slightly different pipeline than that used for SDSS public data releases. We cannot guarantee that the values here will exactly match those in the data release in which these data are included. In particular, we expect the photometric calibrations to differ by of order 0.01 mag.
This note may be cited, but please also cite the SDSS data release paper, Adelman-McCarthy et al. (2006, ApJS, in press, astro-ph/0507711), when using the data or referring to the technical documentation.
GCN Circular #5400
W. Li, University of California, Berkeley, on behalf of the KAIT GRB team, reports:
The robotic 0.76-m Katzman Automatic Imaging Telescope (KAIT) at Lick Observatory observed GRB 060805 detected with Swift (Trigger 222683; Ziaeepour et al. GCN 5398). A combination of filters is used: V, I, and clear. The first 15 s unfiltered image started at 04:49:48 UT, 119 s after the BAT trigger. Our automatic image processing pipeline did not identify any new source relative to the DSS II red image. We set the following limiting magnitudes (calibrated to USNO B1.0 catalog):
```
start UT    Exposure    Filter    Limiting mag

04:49:48    15 s        clear     17.7
04:50:48    15 s        I         16.7
04:51:13    20 s        clear     18.0
04:51:45    45 s        V         16.8
```
GCN Circular #5401
S. B. Cenko (Caltech) reports on behalf of a larger collaboration:
We have imaged the field of GRB 050805 (Ziaeepour et al.; GCN 5398) with the automated Palomar 60-inch telescope. We obtained 2 x 60 s images in Kron R and Sloan i' and z' beginning approximately 3 minutes after the burst, before closing due to high humidity. We find no sources inside the XRT error circle to a limiting magnitude of R > 19.0 (calculated with respect to the USNO-B catalog).
GCN Circular #5402
S. B. Pandey, M. J. Page, H.Z. Ziaeepour and S. R. Oates (UCL-MSSL) report on behalf of the Swift/UVOT team:
The Swift/UVOT began observing the field of GRB 060805 at 04:49:25 UT, 79 s after the BAT trigger (Ziaeepour et al. GCN 5398). No optical afterglow candidate has been found in the coadded images within the XRT error circle (Ziaeepour et al. GCN 5398).
The 3-sigma limiting magnitudes for the coadded images for the 7 filters are listed below:
```
Filter       T_range(s)  Exposure(s)     3sig_Upper limit

WHITE        96-6633       511           20.1
V            79-11779      1583          20.3
B            680-6428      412           20.6
U            656-6223      432           20.2
W1           632-6019      432           19.7
M2           4182-12507    1105          20.6
W2           708-10866     1165          20.7
```
T_range is calculated from the time of the burst. These upper limits have not been corrected for the estimated Galactic reddening of E(B-V) = 0.024 mag (Schlegel et al. 1998).
GCN Circular #5403
L. Barbier (GSFC), S. Barthelmy (GSFC), J. Cummings (GSFC/ORAU), E. Fenimore (LANL), N. Gehrels (GSFC), D. Hullinger (BYU-Idaho), M. Koss (GSFC/UMD), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), D. Palmer (LANL), A. Parsons (GSFC), T. Sakamoto (GSFC/ORAU), G. Sato (GSFC/JSPS/USRA), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC), on behalf of the Swift-BAT team:
Using the data set from T-240 to T+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 060805 (trigger #222683) (Ziaeepour, et al., GCN Circ. 5398). The BAT ground-calculated position is (RA,Dec) = 220.925, 12.576 deg {14h 43m 41.9s, 12d 34' 35.0"} (J2000) +- 2.7 arcmin, (radius, sys+stat, 90% containment). The partial coding was 96%.
The currently available event data record has several gaps, most significantly from T+14.3 to T+19.5 sec. Based on the available data, the mask weighted light curve shows a single peak with a roughly square profile and a duration of ~6 sec. Emission was only seen below 100 keV, which is consistent with the very soft spectrum found. T90 (15-350 keV) is 5.4 +- 0.5 sec (estimated error including systematics).
The time-averaged spectrum from T-1.6 to T+4.7 is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 2.23 +- 0.42. The fluence in the 15-150 keV band is 7.4 +- 2.0 x 10^-8 erg/cm2. The 1-sec peak photon flux measured from T+0.71 sec in the 15-150 keV band is 0.3 +- 0.1 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
GCN Circular #5404
K.L. Page, O. Godet (U Leicester) & H.Z. Ziaeepour (UCL-MSSL) report on behalf of the Swift-XRT team:
We have analysed the first 4 orbits of the XRT data obtained for GRB 060805 (trigger 222683), comprising 8.4 ks of Photon Counting mode data between 101 s - 18.3 ks after the BAT trigger. Using these data, we obtain a refined position of:
```
RA(J2000)  =  14 43 43.59
Dec(J2000) = +12 35 13.2
```
with an uncertainty of 3.9 arcsec (90% containment). This is 47.9 and 1.4 arcsec from the initial BAT and XRT positions respectively (GCN Circ 5398; Ziaeepour et al).
The X-ray afterglow is faint, with a count rate of ~0.1 count s^-1 at 100 seconds after the trigger. After the first orbit, during which the count rate was close to constant, the afterglow decays with a slope of alpha = 1.06 +/- 0.35.
The spectrum (using the combined data from all 4 orbits) can be well fitted by a simple power-law, of Gamma = 2.39 +0.64/-0.51, with a total absorbing column of about 1e21 cm^-2 (compared to the Galactic column density of 1.57e20 cm^-2). During the first orbit (between 101 and 935 seconds after the trigger), the 0.3-10 keV unabsorbed flux was 4.72e-12 erg cm^-2 s^-1.
If the afterglow continues to fade with alpha ~ 1.06, the count rate at 24 hours is predicted to be 1.6e-3 count s^-1, corresponding to an observed (unabsorbed) flux of 5.92e-14 (8.92e-14) erg cm^-2 s^-1.
This circular is an official product of the Swift-XRT team.
GCN Circular #5405
M. Muehlegger, S. Duscha, A. Stefanescu, G. Kanbach, N. Primak, F. Schrey, H. Steinle (MPE Garching) of the OPTIMA-Burst team report from the 1.3m Skinakas Observatory (University of Crete, Heraklion, Greece):
We observed the position of the XRT errorcircle of GRB 060805 (trigger #222683, Ziaeepour, et al., GCN Circ. 5398) on 2006 Aug 05, 18:43 UT (mid-exposure; about 14 hours post burst): in a 30 min R-filter exposure we do not detect a counterpart candidate brighter than R=21.5
GCN Circular #5406
E. Rol (U of Leicester) reports on behalf of the RoboNet telescope network:
We observed the field of GRB060805 (Ziaeepour et al, GCN Circular 5398) with the 2m Liverpool Telescope during the night of 2006-08-05/06, in Sloan r' and i' filters. At the position of the refined XRT position (Page et al, GCN Circular 5404), we do not detect any source. The observations and limiting magnitude are detailed below. Calibration has been performed using the available SDSS data (Cool et al, GCN Circular 5399).
```
  start time      T-delta    exposure time  filter  limiting magnitude
     UT      (mid-obs; days)   (seconds)              (5 sigma)

  21:59:40        0.725         5 x 300       r'         22.9
  22:27:28        0.748         7 x 300       i'         22.6
```
Limit on redshift of host of <3.8 due to g-R ~ 0.0 color. See AJ 138 (2009) 1690
Limit on redshift of host of <2.5 due to trace in X-shooter spectrum. See Kruehler et al. ApJ 758 (2012) 46 and Jakobsson et al. ApJ 752 (2012) 62 (the z<2.5 is for the fainter object; spectrum of brighter object at z=0.6 in error circle shown in Fig. 8) or Rossi et al. A&A 545 (2012) A77
arXiv:1505.06743 X-shooter redshift: 2.3633

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Jochen Greiner, last update: 25-Jun-2015 [Disclaimer]