Gamma-ray Burst 070509

(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 May 07 02:56:15 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     278903,   Seg_Num: 0
GRB_RA:          237.927d {+15h 51m 42s} (J2000),
                 238.194d {+15h 52m 47s} (current),
                 236.127d {+15h 44m 31s} (1950)
GRB_DEC:         -78.681d {-78d 40' 49"} (J2000),
                 -78.702d {-78d 42' 07"} (current),
                 -78.529d {-78d 31' 44"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       5482 [cnts]    Image_Peak=245 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   137     E_range: 15-50 keV
BKG_INTEN:       35226 [cnts]
BKG_TIME:        10094.05 SOD {02:48:14.05} UT
BKG_DUR:         8 [sec]
GRB_DATE:        14229 TJD;   129 DOY;   07/05/09
GRB_TIME:        10107.30 SOD {02:48:27.30} UT
GRB_PHI:          47.22 [deg]
GRB_THETA:        13.88 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     13.60 [sigma]
IMAGE_SIGNIF:    8.66 [sigma]
MERIT_PARAMS:     +1  +0  +0  +1  +1  +6  +0  +0 +47  +1 
SUN_POSTN:        45.67d {+03h 02m 40s}  +17.23d {+17d 13' 44"}
SUN_DIST:        118.24 [deg]   Sun_angle= 11.2 [hr] (West of Sun)
MOON_POSTN:      308.00d {+20h 31m 60s}  -22.11d {-22d 06' 43"}
MOON_DIST:        64.42 [deg]
MOON_ILLUM:      62 [%]
GAL_COORDS:      311.38,-18.89 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      259.13,-56.46 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This Notice was delayed by more than 60 sec past the end of the trigger integration interval;  
COMMENTS:        probably due to it occurring during a Malindi downlink session.  
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 = 13.11,-3.88 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 09 May 07 02:57:33 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     278903,   Seg_Num: 0
POINT_RA:        237.955d {+15h 51m 49s} (J2000)
POINT_DEC:       -78.687d {-78d 41' 11"} (J2000)
POINT_ROLL:      166.658d
IMG_START_DATE:  14229 TJD;   129 DOY;   07/05/09
IMG_START_TIME:  10178.91 SOD {02:49:38.91} UT,   71.6 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.062
N_STARS:         190
X_OFFSET:        441 [pixels]
Y_OFFSET:        621 [pixels]
X_MAX:           1400 [pixels]
Y_MAX:           1580 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00278903000msufc0071.fits
SUN_POSTN:        45.67d {+03h 02m 40s}  +17.23d {+17d 13' 45"}
SUN_DIST:        118.23 [deg]   Sun_angle= 11.2 [hr] (West of Sun)
MOON_POSTN:      308.01d {+20h 32m 02s}  -22.11d {-22d 06' 29"}
MOON_DIST:        64.42 [deg]
MOON_ILLUM:      62 [%]
GAL_COORDS:      311.38,-18.90 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      259.14,-56.46 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 09 May 07 02:56:31 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     278903,   Seg_Num: 0
POINT_RA:        237.955d {+15h 51m 49s} (J2000)
POINT_DEC:       -78.686d {-78d 41' 10"} (J2000)
IMG_START_DATE:  14229 TJD;   129 DOY;   07/05/09
IMG_START_TIME:  10175.56 SOD {02:49:35.56} UT,   68.3 [sec] since BAT Trigger Time
COUNTS:          1    Min_needed= 20
STD_DEV:         0.00   Max_StdDev_for_Good=28.44 [arcsec]
PH2_ITER:        0    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:     Wed 09 May 07 02:58:01 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     278903,   Seg_Num: 0
POINT_RA:        237.955d {+15h 51m 49s} (J2000)
POINT_DEC:       -78.687d {-78d 41' 11"} (J2000)
POINT_ROLL:      166.658d
IMG_START_DATE:  14229 TJD;   129 DOY;   07/05/09
IMG_START_TIME:  10178.91 SOD {02:49:38.91} UT,   71.6 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.062
N_STARS:         190
X_OFFSET:        441 [pixels]
Y_OFFSET:        621 [pixels]
X_MAX:           1400 [pixels]
Y_MAX:           1580 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00278903000msufc0071.fits
SUN_POSTN:        45.67d {+03h 02m 40s}  +17.23d {+17d 13' 45"}
SUN_DIST:        118.23 [deg]   Sun_angle= 11.2 [hr] (West of Sun)
MOON_POSTN:      308.01d {+20h 32m 04s}  -22.11d {-22d 06' 25"}
MOON_DIST:        64.42 [deg]
MOON_ILLUM:      62 [%]
GAL_COORDS:      311.38,-18.90 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      259.14,-56.46 [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 May 07 02:58:56 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     278903,   Seg_Num: 0
POINT_RA:        237.955d {+15h 51m 49s} (J2000)
POINT_DEC:       -78.687d {-78d 41' 11"} (J2000)
ROLL:            166.658d
IMG_START_DATE:  14229 TJD;   129 DOY;   07/05/09
IMG_START_TIME:  10178.91 SOD {02:49:38.91} UT,   71.6 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     200371780
X_OFFSET:        760 [pixels]
Y_OFFSET:        940 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       920
Y_GRB_POS:       1100
BINNING_INDEX:   1
IM_URL:          sw00278903000msuni0071.fits
SUN_POSTN:        45.67d {+03h 02m 41s}  +17.23d {+17d 13' 46"}
SUN_DIST:        118.23 [deg]   Sun_angle= 11.2 [hr] (West of Sun)
MOON_POSTN:      308.02d {+20h 32m 06s}  -22.10d {-22d 06' 15"}
MOON_DIST:        64.43 [deg]
MOON_ILLUM:      62 [%]
GAL_COORDS:      311.38,-18.90 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      259.14,-56.46 [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 May 07 02:59:02 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     278903,   Seg_Num: 0
GRB_RA:          237.927d {+15h 51m 42s} (J2000),
                 238.194d {+15h 52m 47s} (current),
                 236.127d {+15h 44m 31s} (1950)
GRB_DEC:         -78.681d {-78d 40' 49"} (J2000),
                 -78.702d {-78d 42' 07"} (current),
                 -78.529d {-78d 31' 44"} (1950)
GRB_DATE:        14229 TJD;   129 DOY;   07/05/09
GRB_TIME:        10107.30 SOD {02:48:27.30} UT
TRIGGER_INDEX:   137
GRB_PHI:          47.22 [deg]
GRB_THETA:        13.88 [deg]
DELTA_TIME:      -44.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     13.60 [sigma]
IMAGE_SIGNIF:    8.66 [sigma]
LC_URL:          sw00278903000msb.lc
SUN_POSTN:        45.67d {+03h 02m 41s}  +17.23d {+17d 13' 46"}
SUN_DIST:        118.24 [deg]   Sun_angle= 11.2 [hr] (West of Sun)
MOON_POSTN:      308.02d {+20h 32m 06s}  -22.10d {-22d 06' 14"}
MOON_DIST:        64.43 [deg]
MOON_ILLUM:      62 [%]
GAL_COORDS:      311.38,-18.89 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      259.13,-56.46 [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 = 13.11,-3.88 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 09 May 07 02:59:21 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     278903,   Seg_Num: 0
POINT_RA:        237.955d {+15h 51m 49s} (J2000)
POINT_DEC:       -78.687d {-78d 41' 11"} (J2000)
ROLL:            166.658d
IMG_START_DATE:  14229 TJD;   129 DOY;   07/05/09
IMG_START_TIME:  10178.91 SOD {02:49:38.91} UT,   71.6 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     200371780
X_OFFSET:        760 [pixels]
Y_OFFSET:        940 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       920
Y_GRB_POS:       1100
BINNING_INDEX:   1
IM_URL:          sw00278903000msuni0071.fits
SUN_POSTN:        45.67d {+03h 02m 41s}  +17.23d {+17d 13' 46"}
SUN_DIST:        118.23 [deg]   Sun_angle= 11.2 [hr] (West of Sun)
MOON_POSTN:      308.03d {+20h 32m 07s}  -22.10d {-22d 06' 11"}
MOON_DIST:        64.43 [deg]
MOON_ILLUM:      62 [%]
GAL_COORDS:      311.38,-18.90 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      259.14,-56.46 [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:     Wed 09 May 07 03:03:53 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     278903,   Seg_Num: 0
POINT_RA:        237.964d {+15h 51m 51s} (J2000)
POINT_DEC:       -78.688d {-78d 41' 15"} (J2000)
POINT_ROLL:      166.650d
IMG_START_DATE:  14229 TJD;   129 DOY;   07/05/09
IMG_START_TIME:  10284.66 SOD {02:51:24.66} UT,   177.4 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        1.775
N_STARS:         190
X_OFFSET:        441 [pixels]
Y_OFFSET:        621 [pixels]
X_MAX:           1400 [pixels]
Y_MAX:           1580 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00278903000msufc0177.fits
SUN_POSTN:        45.67d {+03h 02m 41s}  +17.23d {+17d 13' 49"}
SUN_DIST:        118.23 [deg]   Sun_angle= 11.2 [hr] (West of Sun)
MOON_POSTN:      308.07d {+20h 32m 17s}  -22.09d {-22d 05' 24"}
MOON_DIST:        64.45 [deg]
MOON_ILLUM:      62 [%]
GAL_COORDS:      311.38,-18.90 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      259.14,-56.46 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 09 May 07 03:04:18 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     278903,   Seg_Num: 0
POINT_RA:        237.964d {+15h 51m 51s} (J2000)
POINT_DEC:       -78.688d {-78d 41' 15"} (J2000)
POINT_ROLL:      166.650d
IMG_START_DATE:  14229 TJD;   129 DOY;   07/05/09
IMG_START_TIME:  10284.66 SOD {02:51:24.66} UT,   177.4 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        1.775
N_STARS:         190
X_OFFSET:        441 [pixels]
Y_OFFSET:        621 [pixels]
X_MAX:           1400 [pixels]
Y_MAX:           1580 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00278903000msufc0177.fits
SUN_POSTN:        45.67d {+03h 02m 41s}  +17.23d {+17d 13' 50"}
SUN_DIST:        118.23 [deg]   Sun_angle= 11.2 [hr] (West of Sun)
MOON_POSTN:      308.07d {+20h 32m 18s}  -22.09d {-22d 05' 19"}
MOON_DIST:        64.45 [deg]
MOON_ILLUM:      62 [%]
GAL_COORDS:      311.38,-18.90 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      259.14,-56.46 [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 May 07 03:05:15 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     278903,   Seg_Num: 0
POINT_RA:        237.964d {+15h 51m 51s} (J2000)
POINT_DEC:       -78.688d {-78d 41' 15"} (J2000)
ROLL:            166.650d
IMG_START_DATE:  14229 TJD;   129 DOY;   07/05/09
IMG_START_TIME:  10284.66 SOD {02:51:24.66} UT,   177.4 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     200371886
X_OFFSET:        760 [pixels]
Y_OFFSET:        940 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       920
Y_GRB_POS:       1100
BINNING_INDEX:   1
IM_URL:          sw00278903000msuni0177.fits
SUN_POSTN:        45.67d {+03h 02m 42s}  +17.23d {+17d 13' 50"}
SUN_DIST:        118.23 [deg]   Sun_angle= 11.2 [hr] (West of Sun)
MOON_POSTN:      308.08d {+20h 32m 20s}  -22.09d {-22d 05' 09"}
MOON_DIST:        64.46 [deg]
MOON_ILLUM:      62 [%]
GAL_COORDS:      311.38,-18.90 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      259.14,-56.46 [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 May 07 03:05:36 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     278903,   Seg_Num: 0
POINT_RA:        237.964d {+15h 51m 51s} (J2000)
POINT_DEC:       -78.688d {-78d 41' 15"} (J2000)
ROLL:            166.650d
IMG_START_DATE:  14229 TJD;   129 DOY;   07/05/09
IMG_START_TIME:  10284.66 SOD {02:51:24.66} UT,   177.4 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     200371886
X_OFFSET:        760 [pixels]
Y_OFFSET:        940 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       920
Y_GRB_POS:       1100
BINNING_INDEX:   1
IM_URL:          sw00278903000msuni0177.fits
SUN_POSTN:        45.67d {+03h 02m 42s}  +17.23d {+17d 13' 50"}
SUN_DIST:        118.23 [deg]   Sun_angle= 11.2 [hr] (West of Sun)
MOON_POSTN:      308.09d {+20h 32m 21s}  -22.09d {-22d 05' 06"}
MOON_DIST:        64.46 [deg]
MOON_ILLUM:      62 [%]
GAL_COORDS:      311.38,-18.90 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      259.14,-56.46 [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:     Wed 09 May 07 03:06:39 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     278903,   Seg_Num: 0
GRB_RA:          237.9591d {+15h 51m 50.1s} (J2000),
                 238.2265d {+15h 52m 54.3s} (current),
                 236.1625d {+15h 44m 39.0s} (1950)
GRB_DEC:         -78.6509d {-78d 39' 03.2"} (J2000),
                 -78.6725d {-78d 40' 21.1"} (current),
                 -78.4995d {-78d 29' 58.1"} (1950)
GRB_ERROR:       4.3 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      5.00 [sigma]
IMG_START_DATE:  14229 TJD;   129 DOY;   07/05/09
IMG_START_TIME:  10175.55 SOD {02:49:35.55} UT,   68.2 [sec] since BAT Trigger Time
TAM[0-3]:        327.61 237.19 261.35 242.66
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:        45.67d {+03h 02m 42s}  +17.23d {+17d 13' 51"}
SUN_DIST:        118.27 [deg]   Sun_angle= 11.2 [hr] (West of Sun)
MOON_POSTN:      308.10d {+20h 32m 23s}  -22.08d {-22d 04' 55"}
MOON_DIST:        64.45 [deg]
MOON_ILLUM:      62 [%]
GAL_COORDS:      311.40,-18.87 [deg] galactic lon,lat of the burst
ECL_COORDS:      259.12,-56.43 [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 May 07 03:07:30 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     278903,   Seg_Num: 0
POINT_RA:        237.965d {+15h 51m 52s} (J2000)
POINT_DEC:       -78.688d {-78d 41' 14"} (J2000)
POINT_ROLL:      166.650d
IMG_START_DATE:  14229 TJD;   129 DOY;   07/05/09
IMG_START_TIME:  10970.17 SOD {03:02:50.17} UT,   862.9 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        4.415
N_STARS:         181
X_OFFSET:        441 [pixels]
Y_OFFSET:        621 [pixels]
X_MAX:           1400 [pixels]
Y_MAX:           1580 [pixels]
DET_THRESH:      18
PHOTO_THRESH:    10
SL_URL:          sw00278903000msufc0862.fits
SUN_POSTN:        45.67d {+03h 02m 42s}  +17.23d {+17d 13' 52"}
SUN_DIST:        118.23 [deg]   Sun_angle= 11.2 [hr] (West of Sun)
MOON_POSTN:      308.10d {+20h 32m 25s}  -22.08d {-22d 04' 46"}
MOON_DIST:        64.47 [deg]
MOON_ILLUM:      62 [%]
GAL_COORDS:      311.38,-18.90 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      259.14,-56.46 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 09 May 07 03:07:58 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     278903,   Seg_Num: 0
POINT_RA:        237.965d {+15h 51m 52s} (J2000)
POINT_DEC:       -78.688d {-78d 41' 14"} (J2000)
POINT_ROLL:      166.650d
IMG_START_DATE:  14229 TJD;   129 DOY;   07/05/09
IMG_START_TIME:  10970.17 SOD {03:02:50.17} UT,   862.9 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        4.415
N_STARS:         181
X_OFFSET:        441 [pixels]
Y_OFFSET:        621 [pixels]
X_MAX:           1400 [pixels]
Y_MAX:           1580 [pixels]
DET_THRESH:      18
PHOTO_THRESH:    10
SL_URL:          sw00278903000msufc0862.fits
SUN_POSTN:        45.68d {+03h 02m 42s}  +17.23d {+17d 13' 52"}
SUN_DIST:        118.23 [deg]   Sun_angle= 11.2 [hr] (West of Sun)
MOON_POSTN:      308.11d {+20h 32m 26s}  -22.08d {-22d 04' 41"}
MOON_DIST:        64.47 [deg]
MOON_ILLUM:      62 [%]
GAL_COORDS:      311.38,-18.90 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      259.14,-56.46 [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 May 07 03:09:27 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     278903,   Seg_Num: 0
POINT_RA:        237.965d {+15h 51m 52s} (J2000)
POINT_DEC:       -78.688d {-78d 41' 14"} (J2000)
ROLL:            166.650d
IMG_START_DATE:  14229 TJD;   129 DOY;   07/05/09
IMG_START_TIME:  10970.17 SOD {03:02:50.17} UT,   862.9 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     200372572
X_OFFSET:        760 [pixels]
Y_OFFSET:        940 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       920
Y_GRB_POS:       1100
BINNING_INDEX:   1
IM_URL:          sw00278903000msuni0862.fits
SUN_POSTN:        45.68d {+03h 02m 42s}  +17.23d {+17d 13' 53"}
SUN_DIST:        118.23 [deg]   Sun_angle= 11.2 [hr] (West of Sun)
MOON_POSTN:      308.12d {+20h 32m 29s}  -22.07d {-22d 04' 26"}
MOON_DIST:        64.47 [deg]
MOON_ILLUM:      62 [%]
GAL_COORDS:      311.38,-18.90 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      259.14,-56.46 [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 May 07 03:09:48 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     278903,   Seg_Num: 0
POINT_RA:        237.965d {+15h 51m 52s} (J2000)
POINT_DEC:       -78.688d {-78d 41' 14"} (J2000)
ROLL:            166.650d
IMG_START_DATE:  14229 TJD;   129 DOY;   07/05/09
IMG_START_TIME:  10970.17 SOD {03:02:50.17} UT,   862.9 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     200372572
X_OFFSET:        760 [pixels]
Y_OFFSET:        940 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       920
Y_GRB_POS:       1100
BINNING_INDEX:   1
IM_URL:          sw00278903000msuni0862.fits
SUN_POSTN:        45.68d {+03h 02m 42s}  +17.23d {+17d 13' 53"}
SUN_DIST:        118.23 [deg]   Sun_angle= 11.2 [hr] (West of Sun)
MOON_POSTN:      308.13d {+20h 32m 30s}  -22.07d {-22d 04' 22"}
MOON_DIST:        64.48 [deg]
MOON_ILLUM:      62 [%]
GAL_COORDS:      311.38,-18.90 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      259.14,-56.46 [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:     Wed 09 May 07 03:11:37 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     278903,   Seg_Num: 0
POINT_RA:        237.966d {+15h 51m 52s} (J2000)
POINT_DEC:       -78.688d {-78d 41' 16"} (J2000)
POINT_ROLL:      166.648d
IMG_START_DATE:  14229 TJD;   129 DOY;   07/05/09
IMG_START_TIME:  11075.84 SOD {03:04:35.84} UT,   968.5 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        3.956
N_STARS:         190
X_OFFSET:        441 [pixels]
Y_OFFSET:        621 [pixels]
X_MAX:           1400 [pixels]
Y_MAX:           1580 [pixels]
DET_THRESH:      17
PHOTO_THRESH:    9
SL_URL:          sw00278903000msufc0968.fits
SUN_POSTN:        45.68d {+03h 02m 43s}  +17.23d {+17d 13' 55"}
SUN_DIST:        118.23 [deg]   Sun_angle= 11.2 [hr] (West of Sun)
MOON_POSTN:      308.14d {+20h 32m 34s}  -22.07d {-22d 04' 03"}
MOON_DIST:        64.48 [deg]
MOON_ILLUM:      62 [%]
GAL_COORDS:      311.38,-18.90 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      259.15,-56.46 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 09 May 07 03:12:05 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     278903,   Seg_Num: 0
POINT_RA:        237.966d {+15h 51m 52s} (J2000)
POINT_DEC:       -78.688d {-78d 41' 16"} (J2000)
POINT_ROLL:      166.648d
IMG_START_DATE:  14229 TJD;   129 DOY;   07/05/09
IMG_START_TIME:  11075.84 SOD {03:04:35.84} UT,   968.5 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        3.956
N_STARS:         190
X_OFFSET:        441 [pixels]
Y_OFFSET:        621 [pixels]
X_MAX:           1400 [pixels]
Y_MAX:           1580 [pixels]
DET_THRESH:      17
PHOTO_THRESH:    9
SL_URL:          sw00278903000msufc0968.fits
SUN_POSTN:        45.68d {+03h 02m 43s}  +17.23d {+17d 13' 55"}
SUN_DIST:        118.23 [deg]   Sun_angle= 11.2 [hr] (West of Sun)
MOON_POSTN:      308.15d {+20h 32m 35s}  -22.07d {-22d 03' 58"}
MOON_DIST:        64.49 [deg]
MOON_ILLUM:      62 [%]
GAL_COORDS:      311.38,-18.90 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      259.15,-56.46 [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 May 07 03:13:02 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     278903,   Seg_Num: 0
POINT_RA:        237.966d {+15h 51m 52s} (J2000)
POINT_DEC:       -78.688d {-78d 41' 16"} (J2000)
ROLL:            166.648d
IMG_START_DATE:  14229 TJD;   129 DOY;   07/05/09
IMG_START_TIME:  11075.84 SOD {03:04:35.84} UT,   968.5 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     200372677
X_OFFSET:        760 [pixels]
Y_OFFSET:        940 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       920
Y_GRB_POS:       1100
BINNING_INDEX:   1
IM_URL:          sw00278903000msuni0968.fits
SUN_POSTN:        45.68d {+03h 02m 43s}  +17.23d {+17d 13' 55"}
SUN_DIST:        118.23 [deg]   Sun_angle= 11.2 [hr] (West of Sun)
MOON_POSTN:      308.16d {+20h 32m 37s}  -22.06d {-22d 03' 48"}
MOON_DIST:        64.49 [deg]
MOON_ILLUM:      62 [%]
GAL_COORDS:      311.38,-18.90 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      259.15,-56.46 [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 May 07 03:13:23 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     278903,   Seg_Num: 0
POINT_RA:        237.966d {+15h 51m 52s} (J2000)
POINT_DEC:       -78.688d {-78d 41' 16"} (J2000)
ROLL:            166.648d
IMG_START_DATE:  14229 TJD;   129 DOY;   07/05/09
IMG_START_TIME:  11075.84 SOD {03:04:35.84} UT,   968.5 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     200372677
X_OFFSET:        760 [pixels]
Y_OFFSET:        940 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       920
Y_GRB_POS:       1100
BINNING_INDEX:   1
IM_URL:          sw00278903000msuni0968.fits
SUN_POSTN:        45.68d {+03h 02m 43s}  +17.23d {+17d 13' 56"}
SUN_DIST:        118.23 [deg]   Sun_angle= 11.2 [hr] (West of Sun)
MOON_POSTN:      308.16d {+20h 32m 38s}  -22.06d {-22d 03' 45"}
MOON_DIST:        64.49 [deg]
MOON_ILLUM:      62 [%]
GAL_COORDS:      311.38,-18.90 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      259.15,-56.46 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN Circular #6393
E.S. Rykoff (U Mich), W. Rujopakarn (Steward), B. E. Schaefer (Louisiana State), report on behalf of the ROTSE collaboration:
ROTSE-IIIc, located at the H.E.S.S. site at Mt. Gamsberg, Namibia, responded to GRB 070509 (Swift trigger 278903), producing images beginning 7.4 s after the GCN notice time. An automated response took the first image at 02:56:22.4 UT, 475.1 s after the burst, under fair conditions. We took 10 5-sec, 10 20-sec and continuing 60-sec exposures. These unfiltered images are calibrated relative to USNO A2.0 (R).
Comparison to the DSS (second epoch) reveals no new sources within the 3-sigma BAT error circle or the XRT error circle, for both single images and coadding into sets of 10. Individual images have limiting magnitudes ranging from 15.2-16.2; we set the following specific limits.
```
start UT       end UT      t_exp(s)   mlim   t_start-tGRB(s)  Coadd?
--------------------------------------------------------------------
02:56:22.4   02:56:27.4         5     15.3          475.1       N
02:56:22.4   02:57:39.6        77     16.6          475.1       Y
02:57:53.8   03:02:39.5       285     17.2          566.5       Y
```
GCN Circular #6394
L. Vetere (PSU), S. D. Barthelmy (GSFC), M. M. Chester (PSU), D. Grupe (PSU), S. T. Holland (CRESST/GSFC/USRA), J. A. Kennea (PSU), C. B. Markwardt (GSFC/UMD), F. E. Marshall (NASA/GSFC), C. Pagani (PSU), D. M. Palmer (LANL), J. L. Racusin (PSU), M. Stamatikos (NASA/ORAU) and D. E. Vanden Berk (PSU) report on behalf of the Swift Team:
At 02:48:27 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070509 (trigger=278903). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 237.927, -78.681 which is
```
   RA(J2000)  =  15h 51m 42s
   Dec(J2000) = -78d 40' 49"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a single FRED-like peak with a duration of about 10 sec. The peak count rate was ~2000 counts/sec (15-350 keV), at ~0 sec after the trigger.
The XRT began taking data at 02:49:35 UT, 68 seconds after the BAT trigger. XRT found a faint, uncatalogued X-ray source. The ground calculated location is RA, Dec 237.9592, -78.6511 which is
```
   RA(J2000) = 15h 51m 50.2s   
   Dec(J2000) = -78d 39'04.0" 
```
with an uncertainty of 4.6 arcsec (radius, 90% containment, including systematic uncertainty). This location is 1.8 arcmin from the BAT on-board position, within the BAT error circle.
UVOT took a finding chart exposure of 100 seconds with the White (160-650 nm) filter starting 72 seconds after the BAT trigger, and a finding chart exposure of 400 seconds in V starting 177 seconds after the BAT trigger. No afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers none of the XRT error circle; the 8'x8' region for the list of sources generated on-board covers 100% of the XRT error circle. The list of sources is typically complete to about 18 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.14.
GCN Circular #6395
S. Piranomonte, S. Covino, L.A. Antonelli, A. Burzi, L. Calzoletti, S. Campana, G. Chincarini, M.L. Conciatore, S. Cutini, P. D'Avanzo, V. D'Elia, F. Dalessio, F. Fiore, D. Fugazza, P. Goldoni, D. Guetta, C. Guidorzi, G.L. Israel, D. Malesani, N. Masetti, A. Melandri, E. Meurs, L. Nicastro, E. Palazzi, E. Pian, D. Rizzuto, L. Stella, G. Stratta, G. Tagliaferri, G. Tosti, V. Testa, S.D. Vergani, F. Vitali report on behalf of the REM team:
We observed the field of the GRB 070509 (Vetere et al., GCN 6394) with the robotic 60-cm REM telescope located at La Silla (Chile). A set of observations was performed automatically in the optical and near infrared filters (V, R, I and J, H, K, z) starting at 02:56:52 UT (33 sec after the Swift alert; more than 8 minutes after the burst).
Preliminary analysis does not show any source down to the 2MASS limit in the XRT error circle (Vetere et al., GCN 6394).
Further analyses are in progress.
This message may be cited.
GCN Circular #6397
J. Cummings (GSFC/UMBC), L. Barbier (GSFC), S. D. Barthelmy (GSFC), E. Fenimore (LANL), N. Gehrels (GSFC), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), D. Palmer (LANL), A. Parsons (GSFC), T. Sakamoto (GSFC/ORAU), G. Sato (GSFC/ISAS), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC), L. Vetere (PSU) on behalf of the Swift-BAT team:
Using the data set from T-239 to T+963 sec from recent telemetry downlinks, we report further analysis of BAT GRB 070509 (trigger #278903) (Vetere, et al., GCN Circ. PSU). The BAT ground-calculated position is RA, Dec = 237.874, -78.657 deg, which is
```
   RA(J2000)  =  15h 51m 29.8s 
   Dec(J2000) = -78d 39' 24.0" 
```
with an uncertainty of 1.7 arcmin, (radius, sys+stat, 90% containment). The partial coding was 92%.
The mask-weighted lightcurve shows a single FRED-like pulse starting at T-2 sec, peaking at T_0, and ending at ~T+10 sec. T90 (15-350 keV) is 7.7 +- 0.3 sec (estimated error including systematics).
The time-averaged spectrum from T-1.1 to T+7.9 is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 2.33 +- 0.25. The fluence in the 15-150 keV band is 1.7 +- 0.3 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T-0.31 sec in the 15-150 keV band is 0.7 +- 0.1 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
We note that the initial TDRSS messages for this burst were delayed ~6 min in transmission to the ground because the burst occurred during a Malindi downlink session.
GCN Circular #6400
L. Vetere, J. L. Racusin, D. Grupe, C. Pagani (PSU) and M. Perri (ASDC) report on behalf of the Swift Team:
We have analysed the first 6.2ks of Swift XRT data from GRB 070509 (trigger number 278903, GCN 6394). The first orbit Photon Counting mode image (1.5ks) provides a refined XRT position at RA,DEC(J200) = 237.9588, -78.6508 which is
```
RA(J2000)  = 15h 51m 50.1s
Dec(J2000) = -78d 39' 03.1"
```
with an uncertainty of 4.1 arcsec (radius, 90% containment). This is 0.9 arcsec from the initial X-ray position (GCN 6394) and 1.0 arcmin from BAT refined position (Cummings et al. GCN 6397).
The XRT light curve can be modeled with a broken power law with the following parameters:
```
alpha1= -0.3 +/- 0.2
tbreak=  341 +/- 120
alpha2= -1.1 +/- 0.2
```
The X-ray spectrum of the first orbit PC data can be fitted with an absorbed power law (photon index = 0.8+/-0.2) with an absorbed column density fixed to the Galactic value (0.91e21 cm^-2; Dickey & Lockman, 1990). The absorbed (unabsorbed) 0.3-10.0keV flux for this spectrum was 8.8E-12 (9.1E-12) ergs cm^-2 s^-1.
Assuming the source continues to decay at the same rate, we predict an XRT count rate of 3.5E-4 counts/s at T+24 hours, which corresponds to an observed (unabsorbed) flux of 5.1E-14 (5.3E-14) ergs cm^-2 s^-1.
This circular is an official product of the Swift XRT team.
GCN Circular #6404
S. T. Holland (CRESST/GSFC/USRA) and L. Vetere (PSU) report on the behalf of the Swift UVOT team:
The Swift/UVOT observed the field of GRB 070509 starting 73 s after the BAT trigger (Vetere et al. 2007, GCN Circ. 6394). We do not find any source, in any of the UVOT observations, inside the refined XRT error circle (Vetere et al., 2007 GCN Circ. 6400).
The 3-sigma upper limits for detecting a source anywhere inside the refined XRT error circle in the co-added frames are:
```
Filter    T_start   T_stop    Exp(s)    Mag (3-sigma upper limit)
-----------------------------------------------------------------
V             179     6074      1003    20.6
B             657     1468        39    18.6
U             633     1443        58    18.4
UVW1          609     1419        58    18.0
UVM2          584     6085        65    17.5
UVW2          686     5869       236    19.3
White          73     1482       225    21.1
-----------------------------------------------------------------
```
The values quoted above are not corrected for the expected Galactic extinction corresponding to a reddening of E_{B-V} = 0.14 mag towards the direction of the burst (Schlegel et al. 1998).
GCN Report 55.1
GCN_Report 55.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_55_1.pdf by L. Vetere at PSU titled: "Swift observations of GRB 070509"
GCN Circular #6410
D. Malesani, C.C. Thoene (DARK), A. Williams (Perth Obs.), J.P.U. Fynbo (DARK), A.O. Jaunsen (Univ. Oslo) and P.M. Vreeswijk (ESO) report on behalf of a larger collaboration:
We observed the field of GRB 070509 (Vetere et al., GCN 6394) with the ESO VLT UT2 equipped with the FORS1 instrument. Short BVRI observations were carried out between 2007 May 9.144 and 9.155 UT (starting 0.65 hr after the GRB). We detect three objects close to the XRT position, at the following coordinates (J2000, 0.5" error):
```
A:  RA = 15:51:49.29   Dec = -78:39:01.7   R = 23.48 +- 0.24
B:  RA = 15:51:50.37   Dec = -78:39:06.4   R = 23.52 +- 0.25
C:  RA = 15:51:50.91   Dec = -78:39:10.2   R = 22.71 +- 0.16
```
Objects A and B are inside the XRT error circle as reported by Vetere et al. (GCN 6400), while objects B and C are inside the XRT error circle as provided in Nat Butler's web page (revision 1.2, http://astro.berkeley.edu/~nat/swift/xrt_pos.html). Objects A and C are extended. Magnitudes are computed at the mean time 9.149 UT (0.78 hr after the GRB) and are calibrated against the USNO-B1 catalog. The 3-sigma limit is R = 23.8. A finding chart of the field can be seen here:
http://www.astro.ku.dk/~malesani/GRB/070509/finder_VLT.jpg
Further R-band observations were carried out with the 1.54m Danish telescope located in La Silla (Chile) and equipped with DFOSC on 2007 May 9.141 (4500 s) and May 13.134 UT (3000 s). Object C is marginally detected in both images, while objects A and B are below the detection limit.
At this stage, we cannot claim association between the GRB and any of the above mentioned objects.
We acknowledge excellent support from the observing staff in Paranal, in particular Alain Smette and Gael James.

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Jochen Greiner, last update: 17-May-2007 [Disclaimer]