TDRSS lightcurve for Trigger=637807

Notes:

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

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 12 Apr 15 08:33:27 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     637807,   Seg_Num: 0
GRB_RA:          273.356d {+18h 13m 25s} (J2000),
                 273.609d {+18h 14m 26s} (current),
                 272.528d {+18h 10m 07s} (1950)
GRB_DEC:         -33.940d {-33d 56' 22"} (J2000),
                 -33.935d {-33d 56' 03"} (current),
                 -33.954d {-33d 57' 13"} (1950)
GRB_ERROR:       4.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=1211 [image_cnts]
TRIGGER_DUR:     64.000 [sec] 
TRIGGER_INDEX:   20000     E_range: 15-50 keV
BKG_INTEN:       0 [cnts]
BKG_TIME:        0.00 SOD {00:00:00.00} UT
BKG_DUR:         0 [sec]
GRB_DATE:        17124 TJD;   102 DOY;   15/04/12
GRB_TIME:        30730.56 SOD {08:32:10.56} UT
GRB_PHI:         -30.49 [deg]
GRB_THETA:        10.66 [deg]
SOLN_STATUS:     0x99D
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    5.87 [sigma]
MERIT_PARAMS:     +0  +0 +100  +6  +1  -5  +0  +1 +32  +1 
SUN_POSTN:        20.46d {+01h 21m 50s}   +8.62d {+08d 36' 57"}
SUN_DIST:        108.75 [deg]   Sun_angle= 7.1 [hr] (West of Sun)
MOON_POSTN:      295.59d {+19h 42m 22s}  -16.19d {-16d 11' 08"}
MOON_DIST:        26.56 [deg]
MOON_ILLUM:      48 [%]
GAL_COORDS:      358.57, -7.62 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      272.83,-10.53 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This is an image trigger.  (The RATE_SIGNIF & BKG_{INTEN, TIME, DUR} are undefined.)  
COMMENTS:        A point_source was found.  
COMMENTS:        This matches a source in the on-board catalog: Num=15702=(null) (probably an AT_Slot).  
COMMENTS:        This matches a source in the ground catalog: XTE_J1814-338,   delta=0.173 [deg].  
COMMENTS:        This is not a GRB.  
COMMENTS:           
COMMENTS:        The IMAGE_SIGNIF is VERY LOW, this is very likely not real.  
COMMENTS:        This trigger occurred at longitude,latitude = 260.75,-19.18 [deg].  

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 12 Apr 15 08:49:10 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     637807,   Seg_Num: 0
GRB_RA:          273.356d {+18h 13m 25s} (J2000),
                 273.609d {+18h 14m 26s} (current),
                 272.528d {+18h 10m 07s} (1950)
GRB_DEC:         -33.940d {-33d 56' 22"} (J2000),
                 -33.935d {-33d 56' 03"} (current),
                 -33.954d {-33d 57' 13"} (1950)
GRB_DATE:        17124 TJD;   102 DOY;   15/04/12
GRB_TIME:        30730.56 SOD {08:32:10.56} UT
TRIGGER_INDEX:   20000
GRB_PHI:         -30.49 [deg]
GRB_THETA:        10.66 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     64.000 [sec] 
SOLN_STATUS:     0x99D
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    5.87 [sigma]
LC_URL:          sw00637807000msb.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:
Sun Apr 12 04:49:22 EDT 2015