Gamma-ray Burst 140302A

(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:     Sun 02 Mar 14 08:13:24 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     589685,   Seg_Num: 0
GRB_RA:          253.842d {+16h 55m 22s} (J2000),
                 254.040d {+16h 56m 10s} (current),
                 253.140d {+16h 52m 34s} (1950)
GRB_DEC:         -12.865d {-12d 51' 53"} (J2000),
                 -12.887d {-12d 53' 11"} (current),
                 -12.786d {-12d 47' 08"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       5662 [cnts]    Image_Peak=476 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   146     E_range: 25-100 keV
BKG_INTEN:       28157 [cnts]
BKG_TIME:        29564.29 SOD {08:12:44.29} UT
BKG_DUR:         8 [sec]
GRB_DATE:        16718 TJD;    61 DOY;   14/03/02
GRB_TIME:        29578.81 SOD {08:12:58.81} UT
GRB_PHI:          41.03 [deg]
GRB_THETA:        18.36 [deg]
SOLN_STATUS:     0x20000003
RATE_SIGNIF:     32.20 [sigma]
IMAGE_SIGNIF:    14.66 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +2  +3  +0  +1  -3  +0 
SUN_POSTN:       343.09d {+22h 52m 21s}   -7.19d {-07d 11' 12"}
SUN_DIST:         87.48 [deg]   Sun_angle= 5.9 [hr] (West of Sun)
MOON_POSTN:      354.84d {+23h 39m 21s}   +0.84d {+00d 50' 24"}
MOON_DIST:       100.71 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:        7.04, 18.62 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      254.02,  9.68 [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 = 3.58,15.74 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This BAT event is temporally(0.0<100sec) coincident with the FERMI_GBM event (trignum=415440781).

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sun 02 Mar 14 08:13:36 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      57
TRIGGER_NUM:     415440781
GRB_RA:          255.130d {+17h 00m 31s} (J2000),
                 255.333d {+17h 01m 20s} (current),
                 254.414d {+16h 57m 39s} (1950)
GRB_DEC:         -15.680d {-15d 40' 47"} (J2000),
                 -15.700d {-15d 42' 00"} (current),
                 -15.607d {-15d 36' 24"} (1950)
GRB_ERROR:       2.25 [deg radius, statistical only]
DATA_SIGNIF:     14.00 [sigma]
DATA_INTERVAL:   4.096 [sec]
GRB_DATE:        16718 TJD;    61 DOY;   14/03/02
GRB_TIME:        29578.89 SOD {08:12:58.89} UT
GRB_PHI:         310.00 [deg]
GRB_THETA:        13.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4143 (Gnd S/W Version number)
SUN_POSTN:       343.09d {+22h 52m 21s}   -7.19d {-07d 11' 12"}
SUN_DIST:         85.91 [deg]   Sun_angle= 5.9 [hr] (West of Sun)
MOON_POSTN:      354.84d {+23h 39m 21s}   +0.84d {+00d 50' 26"}
MOON_DIST:        99.38 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:        5.37, 15.99 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      255.59,  7.02 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        In the LAT Field-of-view.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(0.0<100sec) coincident with the SWIFT_BAT event (trignum=589685).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sun 02 Mar 14 08:13:30 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      47
TRIGGER_NUM:     415440781
GRB_RA:          251.850d {+16h 47m 24s} (J2000),
                 252.050d {+16h 48m 12s} (current),
                 251.144d {+16h 44m 35s} (1950)
GRB_DEC:         -13.983d {-13d 58' 59"} (J2000),
                 -14.008d {-14d 00' 27"} (current),
                 -13.895d {-13d 53' 41"} (1950)
GRB_ERROR:       7.77 [deg radius, statistical plus systematic]
GRB_INTEN:       215 [cnts/sec]
DATA_SIGNIF:     10.00 [sigma]
INTEG_TIME:      1.024 [sec]
GRB_DATE:        16718 TJD;    61 DOY;   14/03/02
GRB_TIME:        29578.89 SOD {08:12:58.89} UT
GRB_PHI:         300.00 [deg]
GRB_THETA:        10.00 [deg]
DATA_TIME_SCALE: 1.0240 [sec]
HARD_RATIO:      0.58
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      94%  GRB
2nd_MOST_LIKELY:   4%  Generic Transient
DETECTORS:       1,0,0, 0,0,0, 1,0,0, 0,0,0, 0,0,
SUN_POSTN:       343.09d {+22h 52m 21s}   -7.19d {-07d 11' 12"}
SUN_DIST:         89.26 [deg]   Sun_angle= 6.1 [hr] (West of Sun)
MOON_POSTN:      354.84d {+23h 39m 21s}   +0.84d {+00d 50' 25"}
MOON_DIST:       102.61 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:        4.89, 19.56 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      252.21,  8.34 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 23.40,20.02 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(0.0<100sec) coincident with the SWIFT_BAT event (trignum=589685).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 02 Mar 14 08:14:48 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     589685,   Seg_Num: 0
GRB_RA:          253.8604d {+16h 55m 26.49s} (J2000),
                 254.0592d {+16h 56m 14.21s} (current),
                 253.1590d {+16h 52m 38.16s} (1950)
GRB_DEC:         -12.8786d {-12d 52' 42.9"} (J2000),
                 -12.9004d {-12d 54' 01.4"} (current),
                 -12.7996d {-12d 47' 58.4"} (1950)
GRB_ERROR:       5.3 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.49e-09 [erg/cm2/sec]
GRB_SIGNIF:      6.85 [sigma]
IMG_START_DATE:  16718 TJD;    61 DOY;   14/03/02
IMG_START_TIME:  29650.95 SOD {08:14:10.95} UT,   72.1 [sec] since BAT Trigger Time
TAM[0-3]:        327.67 237.21 261.61 243.55
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       343.09d {+22h 52m 21s}   -7.19d {-07d 11' 11"}
SUN_DIST:         87.46 [deg]   Sun_angle= 5.9 [hr] (West of Sun)
MOON_POSTN:      354.85d {+23h 39m 24s}   +0.84d {+00d 50' 41"}
MOON_DIST:       100.71 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:        7.04, 18.60 [deg] galactic lon,lat of the burst
ECL_COORDS:      254.04,  9.67 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 1.37 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 02 Mar 14 08:14:59 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     589685,   Seg_Num: 0
GRB_RA:          253.8604d {+16h 55m 26.4s} (J2000),
                 254.0592d {+16h 56m 14.2s} (current),
                 253.1590d {+16h 52m 38.1s} (1950)
GRB_DEC:         -12.8786d {-12d 52' 42.9"} (J2000),
                 -12.9004d {-12d 54' 01.4"} (current),
                 -12.7996d {-12d 47' 58.4"} (1950)
GRB_ERROR:       5.0 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       47 [cnts]
IMG_START_DATE:  16718 TJD;    61 DOY;   14/03/02
IMG_START_TIME:  29650.95 SOD {08:14:10.95} UT,   72.1 [sec] since BAT Trigger Time
CENTROID_X:      306.93,  raw= 307  [pixels]
CENTROID_Y:      282.39,  raw= 282  [pixels]
ROLL:            96.84 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -36.31
GRB_POS_XRT_Z:   3.86
IMAGE_URL:       sw00589685000msxps_rw.img
SUN_POSTN:       343.09d {+22h 52m 21s}   -7.19d {-07d 11' 10"}
SUN_DIST:         87.46 [deg]   Sun_angle= 5.9 [hr] (West of Sun)
MOON_POSTN:      354.85d {+23h 39m 24s}   +0.85d {+00d 50' 43"}
MOON_DIST:       100.71 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:        7.04, 18.60 [deg] galactic lon,lat of the burst
ECL_COORDS:      254.04,  9.67 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 02 Mar 14 08:15:07 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     589685,   Seg_Num: 0
GRB_RA:          253.8604d {+16h 55m 26.4s} (J2000),
                 254.0592d {+16h 56m 14.2s} (current),
                 253.1590d {+16h 52m 38.1s} (1950)
GRB_DEC:         -12.8786d {-12d 52' 42.9"} (J2000),
                 -12.9004d {-12d 54' 01.4"} (current),
                 -12.7996d {-12d 47' 58.4"} (1950)
GRB_ERROR:       5.0 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       47 [cnts]
IMG_START_DATE:  16718 TJD;    61 DOY;   14/03/02
IMG_START_TIME:  29650.95 SOD {08:14:10.95} UT,   72.1 [sec] since BAT Trigger Time
CENTROID_X:      306.93,  raw= 307  [pixels]
CENTROID_Y:      282.39,  raw= 282  [pixels]
ROLL:            96.84 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -36.31
GRB_POS_XRT_Z:   3.86
IMAGE_URL:       sw00589685000msxps_rw.img
SUN_POSTN:       343.09d {+22h 52m 21s}   -7.19d {-07d 11' 10"}
SUN_DIST:         87.46 [deg]   Sun_angle= 5.9 [hr] (West of Sun)
MOON_POSTN:      354.85d {+23h 39m 25s}   +0.85d {+00d 50' 45"}
MOON_DIST:       100.71 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:        7.04, 18.60 [deg] galactic lon,lat of the burst
ECL_COORDS:      254.04,  9.67 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 02 Mar 14 08:16:50 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     589685,   Seg_Num: 0
GRB_RA:          253.842d {+16h 55m 22s} (J2000),
                 254.040d {+16h 56m 10s} (current),
                 253.140d {+16h 52m 34s} (1950)
GRB_DEC:         -12.865d {-12d 51' 53"} (J2000),
                 -12.887d {-12d 53' 11"} (current),
                 -12.786d {-12d 47' 08"} (1950)
GRB_DATE:        16718 TJD;    61 DOY;   14/03/02
GRB_TIME:        29578.81 SOD {08:12:58.81} UT
TRIGGER_INDEX:   146
GRB_PHI:          41.03 [deg]
GRB_THETA:        18.36 [deg]
DELTA_TIME:      -11.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     32.20 [sigma]
IMAGE_SIGNIF:    14.66 [sigma]
LC_URL:          sw00589685000msb.lc
SUN_POSTN:       343.09d {+22h 52m 22s}   -7.19d {-07d 11' 09"}
SUN_DIST:         87.48 [deg]   Sun_angle= 5.9 [hr] (West of Sun)
MOON_POSTN:      354.87d {+23h 39m 29s}   +0.85d {+00d 51' 05"}
MOON_DIST:       100.75 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:        7.04, 18.62 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      254.02,  9.68 [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 = 3.58,15.74 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 02 Mar 14 08:18:43 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     589685,   Seg_Num: 0
POINT_RA:        253.863d {+16h 55m 27s} (J2000)
POINT_DEC:       -12.869d {-12d 52' 08"} (J2000)
POINT_ROLL:      96.839d
IMG_START_DATE:  16718 TJD;    61 DOY;   14/03/02
IMG_START_TIME:  29659.15 SOD {08:14:19.15} UT,   80.3 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        5.972
N_STARS:         86
X_OFFSET:        336 [pixels]
Y_OFFSET:        638 [pixels]
X_MAX:           1295 [pixels]
Y_MAX:           1597 [pixels]
DET_THRESH:      21
PHOTO_THRESH:    12
SL_URL:          sw00589685000msufc0080.fits
SUN_POSTN:       343.09d {+22h 52m 22s}   -7.19d {-07d 11' 07"}
SUN_DIST:         87.46 [deg]   Sun_angle= 5.9 [hr] (West of Sun)
MOON_POSTN:      354.89d {+23h 39m 33s}   +0.86d {+00d 51' 28"}
MOON_DIST:       100.74 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:        7.05, 18.60 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      254.05,  9.68 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 02 Mar 14 08:19:19 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     589685,   Seg_Num: 0
POINT_RA:        253.863d {+16h 55m 27s} (J2000)
POINT_DEC:       -12.869d {-12d 52' 08"} (J2000)
POINT_ROLL:      96.839d
IMG_START_DATE:  16718 TJD;    61 DOY;   14/03/02
IMG_START_TIME:  29659.15 SOD {08:14:19.15} UT,   80.3 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        5.972
N_STARS:         86
X_OFFSET:        336 [pixels]
Y_OFFSET:        638 [pixels]
X_MAX:           1295 [pixels]
Y_MAX:           1597 [pixels]
DET_THRESH:      21
PHOTO_THRESH:    12
SL_URL:          sw00589685000msufc0080.fits
SUN_POSTN:       343.09d {+22h 52m 22s}   -7.19d {-07d 11' 06"}
SUN_DIST:         87.46 [deg]   Sun_angle= 5.9 [hr] (West of Sun)
MOON_POSTN:      354.89d {+23h 39m 34s}   +0.86d {+00d 51' 35"}
MOON_DIST:       100.75 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:        7.05, 18.60 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      254.05,  9.68 [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:     Sun 02 Mar 14 08:21:54 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     589685,   Seg_Num: 0
POINT_RA:        253.863d {+16h 55m 27s} (J2000)
POINT_DEC:       -12.869d {-12d 52' 08"} (J2000)
ROLL:            96.839d
IMG_START_DATE:  16718 TJD;    61 DOY;   14/03/02
IMG_START_TIME:  29659.15 SOD {08:14:19.15} UT,   80.3 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     415440870
X_OFFSET:        822 [pixels]
Y_OFFSET:        958 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       982
Y_GRB_POS:       1118
BINNING_INDEX:   1
IM_URL:          sw00589685000msuni0092.fits
SUN_POSTN:       343.09d {+22h 52m 22s}   -7.18d {-07d 11' 04"}
SUN_DIST:         87.46 [deg]   Sun_angle= 5.9 [hr] (West of Sun)
MOON_POSTN:      354.92d {+23h 39m 40s}   +0.87d {+00d 52' 06"}
MOON_DIST:       100.78 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:        7.05, 18.60 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      254.05,  9.68 [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:     Sun 02 Mar 14 08:22:13 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     589685,   Seg_Num: 0
POINT_RA:        253.863d {+16h 55m 27s} (J2000)
POINT_DEC:       -12.869d {-12d 52' 08"} (J2000)
ROLL:            96.839d
IMG_START_DATE:  16718 TJD;    61 DOY;   14/03/02
IMG_START_TIME:  29659.15 SOD {08:14:19.15} UT,   80.3 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     415440870
X_OFFSET:        822 [pixels]
Y_OFFSET:        958 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       982
Y_GRB_POS:       1118
BINNING_INDEX:   1
IM_URL:          sw00589685000msuni0092.fits
SUN_POSTN:       343.09d {+22h 52m 22s}   -7.18d {-07d 11' 03"}
SUN_DIST:         87.46 [deg]   Sun_angle= 5.9 [hr] (West of Sun)
MOON_POSTN:      354.92d {+23h 39m 41s}   +0.87d {+00d 52' 10"}
MOON_DIST:       100.78 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:        7.05, 18.60 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      254.05,  9.68 [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 #15901
C. Pagani (U Leicester), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), V. D'Elia (ASDC), C. B. Markwardt (NASA/GSFC), A. Maselli (INAF-IASFPA), K. L. Page (U Leicester), M. H. Siegel (PSU) and R. L. C. Starling (U Leicester) report on behalf of the Swift Team:
At 08:12:58 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 140302A (trigger=589685). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 253.842, -12.865, which is
```
   RA(J2000)  =  16h 55m 22s
   Dec(J2000) = -12d 51' 53"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows several peaks with a total duration of about 35 sec. The peak count rate was ~5300 counts/sec (15-350 keV), at ~0 sec after the trigger.
The XRT began observing the field at 08:14:10.9 UT, 72.2 seconds after the BAT trigger. Using promptly downlinked data we find a bright, uncatalogued X-ray source located at RA, Dec 253.85859, -12.87891 which is equivalent to:
```
   RA(J2000)  = 16h 55m 26.06s
   Dec(J2000) = -12d 52' 44.1"
```
with an uncertainty of 4.1 arcseconds (radius, 90% containment). This location is 76 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. We cannot determine whether the source is fading at the present time.
A power-law fit to a spectrum formed from promptly downlinked event data gives a column density consistent with the Galactic value of 1.46 x 10^21 cm^-2 (Kalberla et al. 2005).
The initial flux in the 2.5 s image was 1.49e-09 erg cm^-2 s^-1 (0.2-10 keV).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 80 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers 100% of the XRT error circle. The typical 3-sigma upper limit has been about 19.6 mag. 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 0.52.
Burst Advocate for this burst is C. Pagani (cp232 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:     Sun 02 Mar 14 08:27:21 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     589685,   Seg_Num: 0
POINT_RA:        253.864d {+16h 55m 27s} (J2000)
POINT_DEC:       -12.867d {-12d 52' 01"} (J2000)
POINT_ROLL:      96.839d
IMG_START_DATE:  16718 TJD;    61 DOY;   14/03/02
IMG_START_TIME:  29872.25 SOD {08:17:52.25} UT,   293.4 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        2.718
N_STARS:         39
X_OFFSET:        502 [pixels]
Y_OFFSET:        638 [pixels]
X_MAX:           1461 [pixels]
Y_MAX:           1597 [pixels]
DET_THRESH:      14
PHOTO_THRESH:    7
SL_URL:          sw00589685000msufc0293.fits
SUN_POSTN:       343.10d {+22h 52m 23s}   -7.18d {-07d 10' 59"}
SUN_DIST:         87.47 [deg]   Sun_angle= 5.9 [hr] (West of Sun)
MOON_POSTN:      354.97d {+23h 39m 53s}   +0.89d {+00d 53' 11"}
MOON_DIST:       100.83 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:        7.05, 18.60 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      254.05,  9.68 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 02 Mar 14 08:27:48 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     589685,   Seg_Num: 0
POINT_RA:        253.864d {+16h 55m 27s} (J2000)
POINT_DEC:       -12.867d {-12d 52' 01"} (J2000)
POINT_ROLL:      96.839d
IMG_START_DATE:  16718 TJD;    61 DOY;   14/03/02
IMG_START_TIME:  29872.25 SOD {08:17:52.25} UT,   293.4 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        2.718
N_STARS:         39
X_OFFSET:        502 [pixels]
Y_OFFSET:        638 [pixels]
X_MAX:           1461 [pixels]
Y_MAX:           1597 [pixels]
DET_THRESH:      14
PHOTO_THRESH:    7
SL_URL:          sw00589685000msufc0293.fits
SUN_POSTN:       343.10d {+22h 52m 23s}   -7.18d {-07d 10' 58"}
SUN_DIST:         87.47 [deg]   Sun_angle= 5.9 [hr] (West of Sun)
MOON_POSTN:      354.97d {+23h 39m 54s}   +0.89d {+00d 53' 16"}
MOON_DIST:       100.83 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:        7.05, 18.60 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      254.05,  9.68 [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:     Sun 02 Mar 14 08:28:23 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     589685,   Seg_Num: 0
GRB_RA:          253.8593d {+16h 55m 26.23s} (J2000),
                 254.0581d {+16h 56m 13.95s} (current),
                 253.1579d {+16h 52m 37.90s} (1950)
GRB_DEC:         -12.8788d {-12d 52' 43.6"} (J2000),
                 -12.9006d {-12d 54' 02.1"} (current),
                 -12.7998d {-12d 47' 59.1"} (1950)
GRB_ERROR:       2.6 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  16718 TJD;    61 DOY;   14/03/02
IMG_START_TIME:  29784.00 SOD {08:16:24.00} UT,   205.2 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       343.10d {+22h 52m 23s}   -7.18d {-07d 10' 58"}
SUN_DIST:         87.47 [deg]   Sun_angle= 5.9 [hr] (West of Sun)
MOON_POSTN:      354.98d {+23h 39m 55s}   +0.89d {+00d 53' 23"}
MOON_DIST:       100.84 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:        7.04, 18.60 [deg] galactic lon,lat of the burst
ECL_COORDS:      254.04,  9.67 [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 0.58% < P(seren) < 1.1%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 02 Mar 14 08:29:02 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     589685,   Seg_Num: 0
POINT_RA:        253.864d {+16h 55m 27s} (J2000)
POINT_DEC:       -12.867d {-12d 52' 01"} (J2000)
ROLL:            96.839d
IMG_START_DATE:  16718 TJD;    61 DOY;   14/03/02
IMG_START_TIME:  29872.25 SOD {08:17:52.25} UT,   293.4 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     415441083
X_OFFSET:        822 [pixels]
Y_OFFSET:        958 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       982
Y_GRB_POS:       1118
BINNING_INDEX:   1
IM_URL:          sw00589685000msuni0305.fits
SUN_POSTN:       343.10d {+22h 52m 24s}   -7.18d {-07d 10' 57"}
SUN_DIST:         87.47 [deg]   Sun_angle= 5.9 [hr] (West of Sun)
MOON_POSTN:      354.99d {+23h 39m 57s}   +0.89d {+00d 53' 31"}
MOON_DIST:       100.85 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:        7.05, 18.60 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      254.05,  9.68 [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:     Sun 02 Mar 14 08:29:19 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     589685,   Seg_Num: 0
POINT_RA:        253.864d {+16h 55m 27s} (J2000)
POINT_DEC:       -12.867d {-12d 52' 01"} (J2000)
ROLL:            96.839d
IMG_START_DATE:  16718 TJD;    61 DOY;   14/03/02
IMG_START_TIME:  29872.25 SOD {08:17:52.25} UT,   293.4 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     415441083
X_OFFSET:        822 [pixels]
Y_OFFSET:        958 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       982
Y_GRB_POS:       1118
BINNING_INDEX:   1
IM_URL:          sw00589685000msuni0305.fits
SUN_POSTN:       343.10d {+22h 52m 24s}   -7.18d {-07d 10' 57"}
SUN_DIST:         87.47 [deg]   Sun_angle= 5.9 [hr] (West of Sun)
MOON_POSTN:      354.99d {+23h 39m 57s}   +0.89d {+00d 53' 35"}
MOON_DIST:       100.85 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:        7.05, 18.60 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      254.05,  9.68 [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 #15902
P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT team:
Using promptly downlinked XRT event data for GRB 140302A, we find an enhanced XRT position of the afterglow: RA, Dec: 253.8593, -12.8788 which is equivalent to:
```
   RA (J2000)  = 16 55 26.23
   Dec (J2000) = -12 52 43.7
```
with an uncertainty of 2.6 arcseconds (radius, 90% confidence). Analysis of the promptly available data is online at http://www.swift.ac.uk/sper/589685.
Position enhancement is is described by Goad et al. (2007, A&A, 476, 1401) and Evans et al. (2009, MNRAS, 397, 1177).
This circular is an official product of the Swift-XRT team.
GCN Circular #15903
J. Elliott (MPE Garching), S. Schmidl (TLS Tautenburg), and J. Greiner (MPE Garching) report on behalf of the GROND team:
We observed the field of GRB 140302A (Swift trigger 589685; Pagani et al., GCN #15901) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2m MPG telescope at ESO La Silla Observatory (Chile).
Observations started at 08:21:12 UT on the 2nd March 2014, 8.2 min after the GRB trigger. They were performed at an average seeing of 1.5" and at an average airmass of 1.2.
We find a faint point source inside the enhanced XRT error circle given in Evans et al. (GCN #15902)
```
RA (J2000.0) = 16:55:26.30
DEC (J2000.0) = -12:52:42.2
```
with an uncertainty of 0.5" in each coordinate.
Based on a total exposure of 1936 sec in r', at a mid-time of 0.65 hrs after the burst, we measure the following preliminary magnitude (in AB):
r = 23.7 +/- 0.2 mag.
No statement about fading can be made at this stage.
Given magnitude is calibrated against GROND zeropoint and is not corrected for the expected Galactic foreground extinction corresponding to a reddening of E_(B-V) = 0.52 mag in the direction of the burst (Schlegel et al. 1998).
GCN Circular #15907
J.P. Osborne, A.P. Beardmore, P.A. Evans and M.R. Goad (U. Leicester) report on behalf of the Swift-XRT team.
Using 478 s of XRT Photon Counting mode data and 1 UVOT images for GRB 140302A, 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 = 253.85872, -12.87823 which is equivalent to:
```
RA (J2000): 16h 55m 26.09s
Dec (J2000): -12d 52' 41.6"
```
with an uncertainty of 2.3 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 #15908
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), C. Pagani (U Leicester), D. M. Palmer (LANL), 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+303 sec from recent telemetry downlinks, we report further analysis of BAT GRB 140302A (trigger #589685) (Pagani, et al., GCN Circ. 15901). The BAT ground-calculated position is RA, Dec = 253.862, -12.875 deg, which is
```
   RA(J2000)  =  16h 55m 26.8s 
   Dec(J2000) = -12d 52' 29.8" 
```
with an uncertainty of 1.1 arcmin, (radius, sys+stat, 90% containment). The partial coding was 82%.
The mask-weighted light curve shows a sharp rise starting at ~T-0.1 sec, peaking at ~T+0.2 sec, and a roughly exponential decay with several small peaks riding on top, finally returning to baseline at ~T+190 sec. T90 (15-350 keV) is 87.5 +- 11.4 sec (estimated error including systematics).
The time-averaged spectrum from T-0.09 to T+106.25 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.09 +- 0.09. The fluence in the 15-150 keV band is 2.7 +- 0.1 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T-0.10 sec in the 15-150 keV band is 1.7 +- 0.2 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/589685/BA/
GCN Circular #15909
J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), V. D'Elia (ASDC), A. Maselli (INAF-IASFPA), A. Melandri (INAF-OAB), D.N. Burrows (PSU), J.A. Kennea (PSU), V. Mangano (PSU) and C. Pagani report on behalf of the Swift-XRT team:
We have analysed 6.0 ks of XRT data for GRB 140302A (Pagani et al. GCN Circ. 15901), from 78 s to 23.2 ks after the BAT trigger. The data comprise 136 s in Windowed Timing (WT) mode with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Osborne et al. (GCN Circ. 15902).
The light curve can be modelled with an initial power-law decay with an index of alpha=1.62 (+0.22, -0.23), followed by a break at T+183 s to an alpha of 4.0 (+/-0.4).
A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 1.08 (+0.16, -0.15). The best-fitting absorption column is 3.1 (+1.0, -0.9) x 10^21 cm^-2, in excess of the Galactic value of 1.5 x 10^21 cm^-2 (Kalberla et al. 2005). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 6.8 x 10^-11 (7.7 x 10^-11) erg cm^-2 count^-1.
A summary of the WT-mode spectrum is thus:
```
Total column:	     3.1 (+1.0, -0.9) x 10^21 cm^-2
Galactic foreground: 1.5 x 10^21 cm^-2
Excess significance: 3.2 sigma
Photon index:	     1.08 (+0.16, -0.15)
```
If the light curve continues to decay with a power-law decay index of 4.0, the count rate at T+24 hours will be 1.9 x 10^-10 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 1.3 x 10^-20 (1.4 x 10^-20) erg cm^-2 s^-1.
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00589685.
This circular is an official product of the Swift-XRT team.
GCN Circular #15910
G. Fitzpatrick (UCD) reports on behalf of the Fermi GBM Team:
At 08:12:58.89 UT on 02 March 2014, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 140302A (trigger 415440781/140302342), which was also detected by Swift (Pagani et al., GCN 15901). The GBM on-ground location is consistent with the Swift/XRT position (Pagani et al., GCN 15901).
The GBM light curve consists of a single peak with a duration (T90) of about 64 s (50-300 keV). The time-averaged spectrum from T0 s to T0+64 s is adequately fit by a power law function with an exponential high-energy cutoff. The power law index is -0.49 +/- 0.1 and the cutoff energy, parameterized as Epeak, is 462 +/- 53 keV.
The event fluence (10-1000 keV) in this time interval is (1 +/- 0.05)E-05 erg/cm^2. The 1-sec peak photon flux measured starting from T0 s in the 10-1000 keV band is 3 +/- 0.2 ph/s/cm^2.
The main emission is preceded by an apparent precursor event with an approximate duration of 20 s. This event has been tentatively associated with the GRB based on the location derived by GBM.
The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog.
GCN Circular #15911
D. Kuroda, K. Yanagisawa, Y. Shimizu, H. Toda (OAO, NAOJ), S. Nagayama (NAOJ), M. Yoshida (Hiroshima), K. Ohta (Kyoto) and N. Kawai(Tokyo Tech) report on behalf of MITSuME collaboration:
We observed the field of GRB 140302A (Pagani et al., GCNC 15901) with the optical three color (g', Rc and Ic) CCD camera attached to the MITSuME 50cm telescope of Okayama Astrophysical Observatory.
The observation started on 2014-03-02 19:19:00 UT (~11.1 h after the burst). We could not detect the previously reported afterglow (Elliot et al., GCNC 15903) in all the three bands.
Three sigma upper limits of the OT are listed below. We used GSC 2.3 catalog for flux calibration.
```
#T0+[day]  MID-UT    T-EXP[sec]   g'     Rc     Ic
-----------------------------------------------------
0.48800    19:55:41    2400.0   >19.6  >19.4  >18.7
-----------------------------------------------------
T0+ : Elapsed time after the burst [day]
T-EXP: Total Exposure time [sec]
```

GCN Circular #15912
M. H. Siegel (PSU) and C. Pagani (U Leicester) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 140302A 80 s after the BAT trigger (Pagani et al., GCN Circ. 15901). No optical afterglow consistent with the optical position (Elliott et al. GCN Circ. 15903) is detected in the initial UVOT exposures. Preliminary 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first finding chart (FC) exposure and subsequent exposures are:

Filter         T_start(s)   T_stop(s)      Exp(s)         Mag

white (fc)          80          230          147         >20.5
white               80          593          167         >20.6
white            10575        11481          590         >21.1
v                  624          643           19         >18.3
v                16940        17847          590         >19.4
b                  549          569           19         >19.3
b                 9662        10569          590         >20.5
u (fc)             293          543          246         >19.7
uvw1               672          692           19         >19.0
uvm2             17853        17993          137         >18.9
uvw2             11487        12232          732         >20.2

The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.52 in the direction of the burst (Schlegel et al. 1998).

GCN Circular #15965
J. Elliott (MPE Garching), S. Schmidl (TLS Tautenburg), J.Greiner, J. F. Graham, M. Tanga (all MPE Garching) report on behalf of the GROND team:
We re-observed the field of GRB 140302A (Swift trigger 589685; Pagani et al., GCN #15901) 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 07:18 UT on 4th March 2014, 2 days after the GRB trigger. They were performed at an average seeing of 1.1" and at an average airmass of 1.3.
We no longer detect the source noted in our previous observations (Elliott et al.; GCN #15903) that had a magnitude of r' = 23.7 +/- 0.2 mag. For a total exposure of 1.2 hours we obtain an upper limit (AB) of r' > 25.2 mag and confirm this as the afterglow of GRB 140302A.
The given limit is derived based on calibrating the image against GROND zeropoints and is not corrected for the Galactic foreground extinction corresponding to a reddening of E(B-V)= 0.52 mag in the direction of the burst (Schlegel et al. 1998).
GCN Circular #16060
Klotz A., Turpin D. (IRAP-CNRS-OMP), Boer M., Gendre B., Siellez K., Dereli H., Bardho O. (UNS-CNRS-OCA), Atteia J.L. (IRAP-CNRS-OMP) report:
We imaged the field of GRB 140302A detected by SWIFT (trigger 589685) with the TAROT robotic telescope (D=25cm) located at the European Southern Observatory, La Silla observatory, Chile.
The observations started 36.5s after the GRB trigger (14.3s after the notice). The elevation of the field increased from 48 degrees above horizon and weather conditions were excellent.
The first image is trailed with a duration of 60.0s (see the description in Klotz et al., 2006, A&A 451, L39). We do not detect any OT with a limiting magnitude of: t0+36.5s to t0+96.5s : Rlim = 15.9
The second image is 60.0s exposure in tracking mode. No afterglow candidate is seen: t0+140s to t0+200s : Rlim = 19.0
The next images does not show the candidate identified by Elliott et al. (GCNC 15903) at R=23.7 8.2 min after the trigger.
Magnitudes were estimated with the nearby USNO-B1 stars and are not corrected for galactic dust extinction.
GCN Report 461.1
GCN_Report 461.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_461_1.pdf by C. Pagani at U. Leicester titled: "Swift Observations of GRB 140302A"

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Jochen Greiner, last update: 26-Apr-2014 [Disclaimer]