TDRSS lightcurve for Trigger=639275

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 01:31:42 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     639275,   Seg_Num: 0
GRB_RA:          188.543d {+12h 34m 10s} (J2000),
                 188.738d {+12h 34m 57s} (current),
                 187.907d {+12h 31m 38s} (1950)
GRB_DEC:          +6.981d {+06d 58' 51"} (J2000),
                  +6.896d {+06d 53' 47"} (current),
                  +7.256d {+07d 15' 23"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       32842 [cnts]    Image_Peak=657 [image_cnts]
TRIGGER_DUR:     12.160 [sec] 
TRIGGER_INDEX:   491     E_range: 50-350 keV
BKG_INTEN:       137147 [cnts]
BKG_TIME:        5346.49 SOD {01:29:06.49} UT
BKG_DUR:         64 [sec]
GRB_DATE:        17140 TJD;   118 DOY;   15/04/28
GRB_TIME:        5440.83 SOD {01:30:40.83} UT
GRB_PHI:          36.79 [deg]
GRB_THETA:        43.71 [deg]
SOLN_STATUS:     0x10103
RATE_SIGNIF:     29.83 [sigma]
IMAGE_SIGNIF:    12.63 [sigma]
MERIT_PARAMS:     +1  +0  +0  +4  +3  +2  +0  +0 +83  +0 
SUN_POSTN:        35.11d {+02h 20m 27s}  +14.00d {+14d 00' 06"}
SUN_DIST:        146.51 [deg]   Sun_angle= -10.2 [hr] (East of Sun)
MOON_POSTN:      151.09d {+10h 04m 22s}   +8.21d {+08d 12' 40"}
MOON_DIST:        37.33 [deg]
MOON_ILLUM:      69 [%]
GAL_COORDS:      290.65, 69.44 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      185.06,  9.80 [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 position matches one of the nearby galaxy sources in the on-board catalog!  
COMMENTS:        This does not match any source in the on-board catalog.  
COMMENTS:        This matches a source in the ground catalog: I3521,   delta=0.211 [deg].  
COMMENTS:        This is a GRB in nearby galaxy or it is noise.  
COMMENTS:        This trigger occurred at longitude,latitude = 16.92,19.05 [deg].  

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 28 Apr 15 01:47:23 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     639275,   Seg_Num: 0
GRB_RA:          188.543d {+12h 34m 10s} (J2000),
                 188.738d {+12h 34m 57s} (current),
                 187.907d {+12h 31m 38s} (1950)
GRB_DEC:          +6.981d {+06d 58' 51"} (J2000),
                  +6.896d {+06d 53' 47"} (current),
                  +7.256d {+07d 15' 23"} (1950)
GRB_DATE:        17140 TJD;   118 DOY;   15/04/28
GRB_TIME:        5440.83 SOD {01:30:40.83} UT
TRIGGER_INDEX:   491
GRB_PHI:          36.79 [deg]
GRB_THETA:        43.71 [deg]
DELTA_TIME:      6.00 [sec]
TRIGGER_DUR:     12.160 [sec] 
SOLN_STATUS:     0x103
RATE_SIGNIF:     29.83 [sigma]
IMAGE_SIGNIF:    12.63 [sigma]
LC_URL:          sw00639275000msb.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

Extended TDRSS lc No.4

Plot creation:
Mon Apr 27 21:47:43 EDT 2015