Gamma-ray Burst 140509A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

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Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 09 May 14 02:22:54 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     598497,   Seg_Num: 0
GRB_RA:           46.608d {+03h 06m 26s} (J2000),
                  46.680d {+03h 06m 43s} (current),
                  46.360d {+03h 05m 26s} (1950)
GRB_DEC:         -62.654d {-62d 39' 12"} (J2000),
                 -62.599d {-62d 35' 54"} (current),
                 -62.845d {-62d 50' 42"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       13632 [cnts]    Image_Peak=249 [image_cnts]
TRIGGER_DUR:     4.096 [sec] 
TRIGGER_INDEX:   303     E_range: 25-100 keV
BKG_INTEN:       118893 [cnts]
BKG_TIME:        8476.01 SOD {02:21:16.01} UT
BKG_DUR:         40 [sec]
GRB_DATE:        16786 TJD;   129 DOY;   14/05/09
GRB_TIME:        8533.61 SOD {02:22:13.61} UT
GRB_PHI:          30.05 [deg]
GRB_THETA:        44.19 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     10.14 [sigma]
IMAGE_SIGNIF:    7.60 [sigma]
MERIT_PARAMS:     +1  +0  +0  +2  +2  -2  +0  +0 -17  +0 
SUN_POSTN:        45.94d {+03h 03m 47s}  +17.30d {+17d 18' 16"}
SUN_DIST:         79.91 [deg]   Sun_angle= -0.0 [hr] (East of Sun)
MOON_POSTN:      160.02d {+10h 40m 05s}   +4.16d {+04d 09' 40"}
MOON_DIST:       104.26 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:      280.44,-48.16 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      351.52,-71.39 [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 = 128.08,-20.44 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 09 May 14 02:24:43 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     598497,   Seg_Num: 0
GRB_RA:           46.5953d {+03h 06m 22.87s} (J2000),
                  46.6671d {+03h 06m 40.09s} (current),
                  46.3465d {+03h 05m 23.14s} (1950)
GRB_DEC:         -62.6398d {-62d 38' 23.2"} (J2000),
                 -62.5849d {-62d 35' 05.7"} (current),
                 -62.8315d {-62d 49' 53.5"} (1950)
GRB_ERROR:       6.1 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       5.99e-10 [erg/cm2/sec]
GRB_SIGNIF:      4.89 [sigma]
IMG_START_DATE:  16786 TJD;   129 DOY;   14/05/09
IMG_START_TIME:  8646.10 SOD {02:24:06.10} UT,   112.5 [sec] since BAT Trigger Time
TAM[0-3]:        327.66 237.20 261.44 243.74
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:        45.95d {+03h 03m 47s}  +17.30d {+17d 18' 17"}
SUN_DIST:         79.89 [deg]   Sun_angle= -0.0 [hr] (East of Sun)
MOON_POSTN:      160.04d {+10h 40m 08s}   +4.16d {+04d 09' 23"}
MOON_DIST:       104.27 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:      280.43,-48.17 [deg] galactic lon,lat of the burst
ECL_COORDS:      351.55,-71.38 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 0.89 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 09 May 14 02:24:54 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     598497,   Seg_Num: 0
GRB_RA:           46.5953d {+03h 06m 22.8s} (J2000),
                  46.6671d {+03h 06m 40.0s} (current),
                  46.3465d {+03h 05m 23.1s} (1950)
GRB_DEC:         -62.6398d {-62d 38' 23.2"} (J2000),
                 -62.5849d {-62d 35' 05.7"} (current),
                 -62.8315d {-62d 49' 53.5"} (1950)
GRB_ERROR:       6.1 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       24 [cnts]
IMG_START_DATE:  16786 TJD;   129 DOY;   14/05/09
IMG_START_TIME:  8646.10 SOD {02:24:06.10} UT,   112.5 [sec] since BAT Trigger Time
CENTROID_X:      328.01,  raw= 328  [pixels]
CENTROID_Y:      326.50,  raw= 327  [pixels]
ROLL:            359.35 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   67.67
GRB_POS_XRT_Z:   53.53
IMAGE_URL:       sw00598497000msxps_rw.img
SUN_POSTN:        45.95d {+03h 03m 47s}  +17.30d {+17d 18' 17"}
SUN_DIST:         79.89 [deg]   Sun_angle= -0.0 [hr] (East of Sun)
MOON_POSTN:      160.04d {+10h 40m 09s}   +4.16d {+04d 09' 21"}
MOON_DIST:       104.27 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:      280.43,-48.17 [deg] galactic lon,lat of the burst
ECL_COORDS:      351.55,-71.38 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 09 May 14 02:25:06 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     598497,   Seg_Num: 0
GRB_RA:           46.5953d {+03h 06m 22.8s} (J2000),
                  46.6671d {+03h 06m 40.0s} (current),
                  46.3465d {+03h 05m 23.1s} (1950)
GRB_DEC:         -62.6398d {-62d 38' 23.2"} (J2000),
                 -62.5849d {-62d 35' 05.7"} (current),
                 -62.8315d {-62d 49' 53.5"} (1950)
GRB_ERROR:       6.1 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       24 [cnts]
IMG_START_DATE:  16786 TJD;   129 DOY;   14/05/09
IMG_START_TIME:  8646.10 SOD {02:24:06.10} UT,   112.5 [sec] since BAT Trigger Time
CENTROID_X:      328.01,  raw= 328  [pixels]
CENTROID_Y:      326.50,  raw= 327  [pixels]
ROLL:            359.35 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   67.67
GRB_POS_XRT_Z:   53.53
IMAGE_URL:       sw00598497000msxps_rw.img
SUN_POSTN:        45.95d {+03h 03m 47s}  +17.30d {+17d 18' 17"}
SUN_DIST:         79.89 [deg]   Sun_angle= -0.0 [hr] (East of Sun)
MOON_POSTN:      160.04d {+10h 40m 09s}   +4.16d {+04d 09' 19"}
MOON_DIST:       104.27 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:      280.43,-48.17 [deg] galactic lon,lat of the burst
ECL_COORDS:      351.55,-71.38 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 09 May 14 02:25:55 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     598497,   Seg_Num: 0
GRB_RA:           46.608d {+03h 06m 26s} (J2000),
                  46.680d {+03h 06m 43s} (current),
                  46.360d {+03h 05m 26s} (1950)
GRB_DEC:         -62.654d {-62d 39' 12"} (J2000),
                 -62.599d {-62d 35' 54"} (current),
                 -62.845d {-62d 50' 42"} (1950)
GRB_DATE:        16786 TJD;   129 DOY;   14/05/09
GRB_TIME:        8533.61 SOD {02:22:13.61} UT
TRIGGER_INDEX:   303
GRB_PHI:          30.05 [deg]
GRB_THETA:        44.19 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     4.096 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     10.14 [sigma]
IMAGE_SIGNIF:    7.60 [sigma]
LC_URL:          sw00598497000msb.lc
SUN_POSTN:        45.95d {+03h 03m 47s}  +17.30d {+17d 18' 18"}
SUN_DIST:         79.91 [deg]   Sun_angle= -0.0 [hr] (East of Sun)
MOON_POSTN:      160.04d {+10h 40m 11s}   +4.15d {+04d 09' 11"}
MOON_DIST:       104.26 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:      280.44,-48.16 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      351.52,-71.39 [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 = 128.08,-20.44 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 09 May 14 02:28:54 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     598497,   Seg_Num: 0
POINT_RA:         46.637d {+03h 06m 33s} (J2000)
POINT_DEC:       -62.625d {-62d 37' 28"} (J2000)
ROLL:            359.351d
IMG_START_DATE:  16786 TJD;   129 DOY;   14/05/09
IMG_START_TIME:  8654.45 SOD {02:24:14.45} UT,   120.8 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     421295066
X_OFFSET:        633 [pixels]
Y_OFFSET:        819 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       793
Y_GRB_POS:       979
BINNING_INDEX:   1
IM_URL:          sw00598497000msuni0132.fits
SUN_POSTN:        45.95d {+03h 03m 48s}  +17.31d {+17d 18' 20"}
SUN_DIST:         79.88 [deg]   Sun_angle= -0.1 [hr] (East of Sun)
MOON_POSTN:      160.07d {+10h 40m 16s}   +4.15d {+04d 08' 42"}
MOON_DIST:       104.26 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:      280.39,-48.17 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      351.62,-71.39 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 09 May 14 02:29:13 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     598497,   Seg_Num: 0
POINT_RA:         46.637d {+03h 06m 33s} (J2000)
POINT_DEC:       -62.625d {-62d 37' 28"} (J2000)
ROLL:            359.351d
IMG_START_DATE:  16786 TJD;   129 DOY;   14/05/09
IMG_START_TIME:  8654.45 SOD {02:24:14.45} UT,   120.8 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     421295066
X_OFFSET:        633 [pixels]
Y_OFFSET:        819 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       793
Y_GRB_POS:       979
BINNING_INDEX:   1
IM_URL:          sw00598497000msuni0132.fits
SUN_POSTN:        45.95d {+03h 03m 48s}  +17.31d {+17d 18' 20"}
SUN_DIST:         79.88 [deg]   Sun_angle= -0.1 [hr] (East of Sun)
MOON_POSTN:      160.07d {+10h 40m 17s}   +4.14d {+04d 08' 39"}
MOON_DIST:       104.26 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:      280.39,-48.17 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      351.62,-71.39 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the XRT Position 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:     Fri 09 May 14 02:34:51 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     598497,   Seg_Num: 0
POINT_RA:         46.634d {+03h 06m 32s} (J2000)
POINT_DEC:       -62.624d {-62d 37' 24"} (J2000)
POINT_ROLL:      359.355d
IMG_START_DATE:  16786 TJD;   129 DOY;   14/05/09
IMG_START_TIME:  8813.52 SOD {02:26:53.52} UT,   279.9 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.878
N_STARS:         25
X_OFFSET:        313 [pixels]
Y_OFFSET:        499 [pixels]
X_MAX:           1272 [pixels]
Y_MAX:           1458 [pixels]
DET_THRESH:      8
PHOTO_THRESH:    4
SL_URL:          sw00598497000msufc0279.fits
SUN_POSTN:        45.95d {+03h 03m 48s}  +17.31d {+17d 18' 24"}
SUN_DIST:         79.88 [deg]   Sun_angle= -0.1 [hr] (East of Sun)
MOON_POSTN:      160.12d {+10h 40m 28s}   +4.13d {+04d 07' 45"}
MOON_DIST:       104.27 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:      280.39,-48.17 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      351.62,-71.39 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 09 May 14 02:35:11 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     598497,   Seg_Num: 0
POINT_RA:         46.634d {+03h 06m 32s} (J2000)
POINT_DEC:       -62.624d {-62d 37' 24"} (J2000)
POINT_ROLL:      359.355d
IMG_START_DATE:  16786 TJD;   129 DOY;   14/05/09
IMG_START_TIME:  8813.52 SOD {02:26:53.52} UT,   279.9 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.878
N_STARS:         25
X_OFFSET:        313 [pixels]
Y_OFFSET:        499 [pixels]
X_MAX:           1272 [pixels]
Y_MAX:           1458 [pixels]
DET_THRESH:      8
PHOTO_THRESH:    4
SL_URL:          sw00598497000msufc0279.fits
SUN_POSTN:        45.95d {+03h 03m 49s}  +17.31d {+17d 18' 24"}
SUN_DIST:         79.88 [deg]   Sun_angle= -0.1 [hr] (East of Sun)
MOON_POSTN:      160.12d {+10h 40m 29s}   +4.13d {+04d 07' 42"}
MOON_DIST:       104.27 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:      280.39,-48.17 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      351.62,-71.39 [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 09 May 14 02:35:41 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     598497,   Seg_Num: 0
GRB_RA:           46.5955d {+03h 06m 22.92s} (J2000),
                  46.6673d {+03h 06m 40.14s} (current),
                  46.3466d {+03h 05m 23.19s} (1950)
GRB_DEC:         -62.6394d {-62d 38' 21.8"} (J2000),
                 -62.5845d {-62d 35' 04.3"} (current),
                 -62.8311d {-62d 49' 52.1"} (1950)
GRB_ERROR:       2.2 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  16786 TJD;   129 DOY;   14/05/09
IMG_START_TIME:  8800.00 SOD {02:26:40.00} UT,   266.4 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        45.95d {+03h 03m 49s}  +17.31d {+17d 18' 24"}
SUN_DIST:         79.89 [deg]   Sun_angle= -0.0 [hr] (East of Sun)
MOON_POSTN:      160.12d {+10h 40m 29s}   +4.13d {+04d 07' 37"}
MOON_DIST:       104.28 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:      280.43,-48.17 [deg] galactic lon,lat of the burst
ECL_COORDS:      351.55,-71.38 [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.  
COMMENTS:        The probability that this is a serendipitous source in the  
COMMENTS:        SPER window is 0.11% < P(seren) < 0.58%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 09 May 14 02:36:23 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     598497,   Seg_Num: 0
POINT_RA:         46.634d {+03h 06m 32s} (J2000)
POINT_DEC:       -62.624d {-62d 37' 24"} (J2000)
ROLL:            359.355d
IMG_START_DATE:  16786 TJD;   129 DOY;   14/05/09
IMG_START_TIME:  8813.52 SOD {02:26:53.52} UT,   279.9 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     421295225
X_OFFSET:        633 [pixels]
Y_OFFSET:        819 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       793
Y_GRB_POS:       979
BINNING_INDEX:   1
IM_URL:          sw00598497000msuni0291.fits
SUN_POSTN:        45.95d {+03h 03m 49s}  +17.31d {+17d 18' 25"}
SUN_DIST:         79.88 [deg]   Sun_angle= -0.1 [hr] (East of Sun)
MOON_POSTN:      160.13d {+10h 40m 31s}   +4.13d {+04d 07' 30"}
MOON_DIST:       104.27 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:      280.39,-48.17 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      351.62,-71.39 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 09 May 14 02:36:38 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     598497,   Seg_Num: 0
POINT_RA:         46.634d {+03h 06m 32s} (J2000)
POINT_DEC:       -62.624d {-62d 37' 24"} (J2000)
ROLL:            359.355d
IMG_START_DATE:  16786 TJD;   129 DOY;   14/05/09
IMG_START_TIME:  8813.52 SOD {02:26:53.52} UT,   279.9 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     421295225
X_OFFSET:        633 [pixels]
Y_OFFSET:        819 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       793
Y_GRB_POS:       979
BINNING_INDEX:   1
IM_URL:          sw00598497000msuni0291.fits
SUN_POSTN:        45.95d {+03h 03m 49s}  +17.31d {+17d 18' 25"}
SUN_DIST:         79.88 [deg]   Sun_angle= -0.1 [hr] (East of Sun)
MOON_POSTN:      160.13d {+10h 40m 31s}   +4.12d {+04d 07' 28"}
MOON_DIST:       104.27 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:      280.39,-48.17 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      351.62,-71.39 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN Circular #16230
K. L. Page (U Leicester), S. D. Barthelmy (GSFC), D. N. Burrows (PSU), J. R. Cummings (NASA/UMBC), N. Gehrels (NASA/GSFC), J. A. Kennea (PSU), V. Mangano (PSU), C. B. Markwardt (NASA/GSFC), F. E. Marshall (NASA/GSFC), C. J. Mountford (U Leicester), D. M. Palmer (LANL) and M. H. Siegel (PSU) report on behalf of the Swift Team:
At 02:22:13 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 140509A (trigger=598497). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 46.608, -62.654 which is
```
   RA(J2000)  =  03h 06m 26s
   Dec(J2000) = -62d 39' 12"
```
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 30 sec. The peak count rate was ~1200 counts/sec (15-350 keV), at ~4 sec after the trigger.
The XRT began observing the field at 02:24:06.1 UT, 112.5 seconds after the BAT trigger. Using promptly downlinked data we find a bright, uncatalogued X-ray source with an enhanced position: RA, Dec 46.5952, -62.6396 which is equivalent to:
```
   RA(J2000)  = 03h 06m 22.84s
   Dec(J2000) = -62d 38' 22.6"
```
with an uncertainty of 2.1 arcseconds (radius, 90% containment). This location is 55 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 in excess of the Galactic value (2.23 x 10^20 cm^-2, Willingale et al. 2013), with an excess column of 3.6 (+2.56/-2.25) x 10^21 cm^-2 (90% confidence).
The initial flux in the 2.5 s image was 5.99e-10 erg cm^-2 s^-1 (0.2-10 keV).
UVOT took a finding chart exposure of 250 seconds with the U filter starting 279 seconds after the BAT trigger. There is a candidate afterglow in the list of sources generated on-board at
```
 RA(J2000)  =	03:06:22.67 =  46.59444
 DEC(J2000) = -62:38:21.7  = -62.63937
```
with a 90%-confidence error radius of about 1.10 arc sec. This position is 1.7 arc sec. from the center of the XRT error circle. The estimated magnitude is 16.24. No correction has been made for the expected extinction corresponding to E(B-V) of 0.02.
Burst Advocate for this burst is K. L. Page (kpa AT star.le.ac.uk). 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 NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 09 May 14 02:39:06 UT
NOTICE_TYPE:     Swift-UVOT Position
TRIGGER_NUM:     598497,   Seg_Num: 0
GRB_RA:           46.5945d {+03h 06m 22.67s} (J2000),
                  46.6663d {+03h 06m 39.90s} (current),
                  46.3456d {+03h 05m 22.95s} (1950)
GRB_DEC:         -62.6393d {-62d 38' 21.4"} (J2000),
                 -62.5844d {-62d 35' 03.9"} (current),
                 -62.8310d {-62d 49' 51.7"} (1950)
GRB_ERROR:       0.8 [arcsec radius, statistical only]
GRB_MAG:         16.25 +/- 0.14 [mag]
FILTER:          7, U
IMG_START_DATE:  16786 TJD;   129 DOY;   14/05/09
IMG_START_TIME:  8812.00 SOD {02:26:52.00} UT,   278.4 [sec] since BAT Trigger Time
SUN_POSTN:        45.95d {+03h 03m 49s}  +17.31d {+17d 18' 27"}
SUN_DIST:         79.89 [deg]   Sun_angle= -0.0 [hr] (East of Sun)
MOON_POSTN:      160.15d {+10h 40m 36s}   +4.12d {+04d 07' 04"}
MOON_DIST:       104.29 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:      280.43,-48.17 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      351.55,-71.38 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT UVOT Position Notice.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        The UVOT position is 2.2 arcsec from the XRT position.  
COMMENTS:        Result based on Genie data.  
COMMENTS:        Notice generated automatically.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 09 May 14 02:41:29 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     598497,   Seg_Num: 0
POINT_RA:         46.634d {+03h 06m 32s} (J2000)
POINT_DEC:       -62.624d {-62d 37' 24"} (J2000)
POINT_ROLL:      359.355d
IMG_START_DATE:  16786 TJD;   129 DOY;   14/05/09
IMG_START_TIME:  9390.68 SOD {02:36:30.68} UT,   857.1 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.401
N_STARS:         66
X_OFFSET:        73 [pixels]
Y_OFFSET:        259 [pixels]
X_MAX:           1512 [pixels]
Y_MAX:           1698 [pixels]
DET_THRESH:      15
PHOTO_THRESH:    8
SL_URL:          sw00598497000msufc0857.fits
SUN_POSTN:        45.96d {+03h 03m 50s}  +17.31d {+17d 18' 28"}
SUN_DIST:         79.88 [deg]   Sun_angle= -0.0 [hr] (East of Sun)
MOON_POSTN:      160.17d {+10h 40m 41s}   +4.11d {+04d 06' 41"}
MOON_DIST:       104.28 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:      280.39,-48.17 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      351.62,-71.39 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 09 May 14 02:41:47 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     598497,   Seg_Num: 0
POINT_RA:         46.634d {+03h 06m 32s} (J2000)
POINT_DEC:       -62.624d {-62d 37' 24"} (J2000)
POINT_ROLL:      359.355d
IMG_START_DATE:  16786 TJD;   129 DOY;   14/05/09
IMG_START_TIME:  9390.68 SOD {02:36:30.68} UT,   857.1 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.401
N_STARS:         66
X_OFFSET:        73 [pixels]
Y_OFFSET:        259 [pixels]
X_MAX:           1512 [pixels]
Y_MAX:           1698 [pixels]
DET_THRESH:      15
PHOTO_THRESH:    8
SL_URL:          sw00598497000msufc0857.fits
SUN_POSTN:        45.96d {+03h 03m 50s}  +17.31d {+17d 18' 28"}
SUN_DIST:         79.88 [deg]   Sun_angle= -0.0 [hr] (East of Sun)
MOON_POSTN:      160.17d {+10h 40m 41s}   +4.11d {+04d 06' 38"}
MOON_DIST:       104.28 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:      280.39,-48.17 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      351.62,-71.39 [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 09 May 14 02:42:56 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     598497,   Seg_Num: 0
POINT_RA:         46.634d {+03h 06m 32s} (J2000)
POINT_DEC:       -62.624d {-62d 37' 24"} (J2000)
ROLL:            359.355d
IMG_START_DATE:  16786 TJD;   129 DOY;   14/05/09
IMG_START_TIME:  9390.68 SOD {02:36:30.68} UT,   857.1 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     421295802
X_OFFSET:        632 [pixels]
Y_OFFSET:        818 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       792
Y_GRB_POS:       978
BINNING_INDEX:   1
IM_URL:          sw00598497000msuni0869.fits
SUN_POSTN:        45.96d {+03h 03m 50s}  +17.31d {+17d 18' 29"}
SUN_DIST:         79.88 [deg]   Sun_angle= -0.0 [hr] (East of Sun)
MOON_POSTN:      160.18d {+10h 40m 43s}   +4.11d {+04d 06' 27"}
MOON_DIST:       104.28 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:      280.39,-48.17 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      351.62,-71.39 [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 09 May 14 02:43:13 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     598497,   Seg_Num: 0
POINT_RA:         46.634d {+03h 06m 32s} (J2000)
POINT_DEC:       -62.624d {-62d 37' 24"} (J2000)
ROLL:            359.355d
IMG_START_DATE:  16786 TJD;   129 DOY;   14/05/09
IMG_START_TIME:  9390.68 SOD {02:36:30.68} UT,   857.1 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     421295802
X_OFFSET:        632 [pixels]
Y_OFFSET:        818 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       792
Y_GRB_POS:       978
BINNING_INDEX:   1
IM_URL:          sw00598497000msuni0869.fits
SUN_POSTN:        45.96d {+03h 03m 50s}  +17.31d {+17d 18' 29"}
SUN_DIST:         79.88 [deg]   Sun_angle= -0.0 [hr] (East of Sun)
MOON_POSTN:      160.18d {+10h 40m 44s}   +4.11d {+04d 06' 24"}
MOON_DIST:       104.28 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:      280.39,-48.17 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      351.62,-71.39 [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 #16233
A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team.
Using 1253 s of XRT Photon Counting mode data and 2 UVOT images for GRB 140509A, 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 = 46.59538, -62.63941 which is equivalent to:
```
RA (J2000): 03h 06m 22.89s
Dec (J2000): -62d 38' 21.9"
```
with an uncertainty of 1.8 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) and Evans et al. (2009, MNRAS, 397, 1177).
This circular was automatically generated, and is an official product of the Swift-XRT team.
GCN Circular #16237
A.P. Beardmore (U. Leicester), P.A. Evans (U. Leicester), B.P. Gompertz (U. Leicester), P. D'Avanzo (INAF-OAB), V. D'Elia (ASDC), M. de Pasquale (INAF-IASFPA), J.A. Kennea (PSU), V. Mangano (PSU), M.C. Stroh (PSU) and K.L. Page report on behalf of the Swift-XRT team:
We have analysed 6.4 ks of XRT data for GRB 140509A (Page et al. GCN Circ. 16230), from 102 s to 13.0 ks after the BAT trigger. The data comprise 137 s in Windowed Timing (WT) mode (the first 8 s were taken while Swift was slewing) with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Beardmore et al. (GCN Circ. 16233).
The light curve can be modelled with an initial power-law decay with an index of alpha=1.43 (+0.18, -0.08), followed by a break at T+1030 s to an alpha of 0.88 (+0.12, -0.10).
A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 1.66 (+0.17, -0.16). The best-fitting absorption column is 4.9 (+4.5, -2.6) x 10^20 cm^-2, consistent with the Galactic value of 2.2 x 10^20 cm^-2 (Willingale et al. 2013). The PC mode spectrum has a photon index of 1.91 (+/-0.14) and a best-fitting absorption column of 7.4 (+3.6, -3.3) x 10^20 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.4 x 10^-11 (4.0 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     7.4 (+3.6, -3.3) x 10^20 cm^-2
Galactic foreground: 2.2 x 10^20 cm^-2
Excess significance: 2.6 sigma
Photon index:	     1.91 (+/-0.14)
```
If the light curve continues to decay with a power-law decay index of 0.88, the count rate at T+24 hours will be 8.4 x 10^-3 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 2.9 x 10^-13 (3.3 x 10^-13) erg cm^-2 s^-1.
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00598497.
This circular is an official product of the Swift-XRT team.
GCN Circular #16240
D. M. Palmer (LANL), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), A. Y. Lien (NASA/UMBC), C. B. Markwardt (GSFC), T. Sakamoto (AGU), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU) (i.e. the Swift-BAT team):
Using the data set from T-240 to T+962 sec from the recent telemetry downlink, we report further analysis of BAT GRB 140509A (trigger #598497) (Page, et al., GCN Circ. 16230). The BAT ground-calculated position is RA, Dec = 46.564, -62.662 deg which is
```
    RA(J2000)  =  03h 06m 15.3s
    Dec(J2000) = -62d 39' 43"
```
with an uncertainty of 1.9 arcmin, (radius, sys+stat, 90% containment). The partial coding was 19%.
The mask-weighted light curve shows a single FRED peak. T90 (15-350 keV) is 23.20 +- 5.17 sec (estimated error including systematics).
The time-averaged spectrum from T-3.8 to T+23.1 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.59 +- 0.20. The fluence in the 15-150 keV band is 1.2 +- 0.2 x 10^-06 erg/cm2. The 1-sec peak photon flux measured from T+1.78 sec in the 15-150 keV band is 1.6 +- 0.4 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/598497/BA/
GCN Circular #16241
F. E. Marshall (NASA/GSFC) and K. L. Page (U. Leicester) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 140509A 121 s after the BAT trigger (Page et al., GCN Circ. 16230). A source consistent with the XRT position (Beardmore et al. GCN Circ. 16233) is detected in the initial UVOT exposures.
The preliminary UVOT position is:
```
    RA  (J2000) =  03:06:22.69 =  46.59456 (deg.)
    Dec (J2000) = -62:38:21.7  = -62.63935 (deg.)
```
with an estimated uncertainty of 0.42 arc sec. (radius, 90% confidence).
Preliminary detections and 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the early exposures are:
```
Filter         T_start(s)   T_stop(s)      Exp(s)           Mag

white              121          271          147         17.00 +/- 0.03
v                  610          630           20         16.50 +/- 0.13
b                  536          556           20         17.04 +/- 0.10
u                  280          530          246         16.35 +/- 0.03
w1                 659         7011          490        >20.6
m2                 634         6806          490        >21.1
w2                 585         6396          432        >20.9
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.02 in the direction of the burst (Schlegel et al. 1998).
The lack of detections in the UV filters suggests a redshift of about 2.4.
GCN Circular #16992
P. Schady (MPE Garching), A. Nicuesa Guelbenzu (TLS Tautenburg) and J. Greiner (MPE Garching) report on behalf of the GROND team:
We observed the field of GRB 140509A (Swift trigger 598497; Page et al., GCN #16230) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2 m MPG telescope at La Silla Observatory (Chile).
Observations started at 10:07 UT on 09 May 2014, about 8 hours after the GRB trigger. They were performed at high airmass and a mean seeing of 1.4".
Using the first ~8 minutes of data with a midtime of 10.18UT after the trigger, we detect a source consistent with the UVOT position (Marshall et al., GCN #16241) with the following AB magnitudes:
```
g' = 21.6 +/- 0.2
r' = 21.1 +/- 0.1
i' = 20.9 +/- 0.1
z' = 20.7 +/- 0.1
J = 20.4 +/- 0.4
H = 20.1 +/- 0.4
K > 20.0
```
In a later epoch of observations taken on September 24th the source is no longer detected in any of the optical or NIR filters down to the following AB 3sigma limits:
```
g' > 25.8
r' > 25.3
i' > 24.7
z' > 24.3
J > 22.1
H > 21.6
K > 20.7
```
thus confirming that the source detections in our initial observations corresponded to the GRB optical afterglow and not to a potential host.
All given magnitudes are calibrated against GROND zero points in the optical, and against 2MASS field stars in the NIR, and are not corrected for the expected Galactic foreground extinction corresponding to a reddening of E_(B-V)=3D0.02 mag in the direction of the burst (Schlegel et al. 1998).

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Jochen Greiner, last update: 30-Oct-2014 [Disclaimer]