TDRSS lightcurve for Trigger=639278

Notes:

• 1) None of the TDRSS light curves are background subtracted.

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 28 Apr 15 03:12:38 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     639278,   Seg_Num: 0
GRB_RA:          292.654d {+19h 30m 37s} (J2000),
                 292.845d {+19h 31m 23s} (current),
                 292.032d {+19h 28m 08s} (1950)
GRB_DEC:          +4.116d {+04d 06' 57"} (J2000),
                  +4.149d {+04d 08' 55"} (current),
                  +4.010d {+04d 00' 36"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       6986 [cnts]    Image_Peak=204 [image_cnts]
TRIGGER_DUR:     2.048 [sec] 
TRIGGER_INDEX:   473     E_range: 25-100 keV
BKG_INTEN:       69057 [cnts]
BKG_TIME:        11490.49 SOD {03:11:30.49} UT
BKG_DUR:         24 [sec]
GRB_DATE:        17140 TJD;   118 DOY;   15/04/28
GRB_TIME:        11523.51 SOD {03:12:03.51} UT
GRB_PHI:         -154.61 [deg]
GRB_THETA:        43.55 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     10.24 [sigma]
IMAGE_SIGNIF:    7.45 [sigma]
MERIT_PARAMS:     +1  +0  +0  +1  +2  -2  +0  +1 +18  +0 
SUN_POSTN:        35.18d {+02h 20m 43s}  +14.02d {+14d 01' 25"}
SUN_DIST:        100.91 [deg]   Sun_angle= 6.8 [hr] (West of Sun)
MOON_POSTN:      151.89d {+10h 07m 35s}   +7.98d {+07d 58' 36"}
MOON_DIST:       139.20 [deg]
MOON_ILLUM:      70 [%]
GAL_COORDS:       41.11, -6.79 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      295.21, 25.59 [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 = 12.34,20.51 [deg].  

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 28 Apr 15 03:30:10 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     639278,   Seg_Num: 0
GRB_RA:          292.654d {+19h 30m 37s} (J2000),
                 292.845d {+19h 31m 23s} (current),
                 292.032d {+19h 28m 08s} (1950)
GRB_DEC:          +4.116d {+04d 06' 57"} (J2000),
                  +4.149d {+04d 08' 55"} (current),
                  +4.010d {+04d 00' 36"} (1950)
GRB_DATE:        17140 TJD;   118 DOY;   15/04/28
GRB_TIME:        11523.51 SOD {03:12:03.51} UT
TRIGGER_INDEX:   473
GRB_PHI:         -154.61 [deg]
GRB_THETA:        43.55 [deg]
DELTA_TIME:      57.00 [sec]
TRIGGER_DUR:     2.048 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     10.24 [sigma]
IMAGE_SIGNIF:    7.45 [sigma]
LC_URL:          sw00639278000msb.lc

Initial TDRSS lightcurve and spacecraft attitude plot

TDRSS lightcurve from T0-30 to T0+50 (zoom in)

TDRSS light curve from T0-1 to T0+2 (More zoom in)

1.6s binned TDRSS light curve

Extended TDRSS light curve and spacecraft attitude plot(s)

Extended TDRSS lc No.1

Extended TDRSS lc No.2

Extended TDRSS lc No.3

Plot creation:
Mon Apr 27 23:30:23 EDT 2015