TDRSS lightcurve for Trigger=637765

Notes:

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

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 11 Apr 15 19:38:41 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     637765,   Seg_Num: 0
GRB_RA:          272.073d {+18h 08m 18s} (J2000),
                 272.333d {+18h 09m 20s} (current),
                 271.223d {+18h 04m 54s} (1950)
GRB_DEC:         -36.974d {-36d 58' 27"} (J2000),
                 -36.971d {-36d 58' 15"} (current),
                 -36.982d {-36d 58' 56"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       1536 [cnts]    Image_Peak=131 [image_cnts]
TRIGGER_DUR:     0.512 [sec] 
TRIGGER_INDEX:   118     E_range: 15-25 keV
BKG_INTEN:       16869 [cnts]
BKG_TIME:        70570.56 SOD {19:36:10.56} UT
BKG_DUR:         8 [sec]
GRB_DATE:        17123 TJD;   101 DOY;   15/04/11
GRB_TIME:        70585.22 SOD {19:36:25.22} UT
GRB_PHI:         -44.37 [deg]
GRB_THETA:         5.99 [deg]
SOLN_STATUS:     0x10D
RATE_SIGNIF:     13.49 [sigma]
IMAGE_SIGNIF:    8.96 [sigma]
MERIT_PARAMS:     +0  +0 +95  -1  +0  -1  +0  +1 +32  +0 
SUN_POSTN:        19.96d {+01h 19m 51s}   +8.42d {+08d 25' 08"}
SUN_DIST:        109.11 [deg]   Sun_angle= 7.2 [hr] (West of Sun)
MOON_POSTN:      287.94d {+19h 11m 47s}  -17.12d {-17d 07' 27"}
MOON_DIST:        24.16 [deg]
MOON_ILLUM:      54 [%]
GAL_COORDS:      355.37, -8.12 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      271.70,-13.55 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This Notice was delayed by more than 60 sec past the end of the trigger integration interval;  
COMMENTS:        probably due to it occurring during a Malindi downlink session.  
COMMENTS:        This is a rate trigger.  
COMMENTS:        A point_source was found.  
COMMENTS:        This matches a source in the on-board catalog: Num=10341=SAX1808.4-3658,   delta=0.030 [deg].  
COMMENTS:        This matches a source in the ground catalog: SAX1808.4-3658,   delta=0.030 [deg].  
COMMENTS:        This is not a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 12.76,-7.89 [deg].  

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 11 Apr 15 19:53:26 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     637765,   Seg_Num: 0
GRB_RA:          272.073d {+18h 08m 18s} (J2000),
                 272.333d {+18h 09m 20s} (current),
                 271.223d {+18h 04m 54s} (1950)
GRB_DEC:         -36.974d {-36d 58' 27"} (J2000),
                 -36.971d {-36d 58' 15"} (current),
                 -36.982d {-36d 58' 56"} (1950)
GRB_DATE:        17123 TJD;   101 DOY;   15/04/11
GRB_TIME:        70585.22 SOD {19:36:25.22} UT
TRIGGER_INDEX:   118
GRB_PHI:         -44.37 [deg]
GRB_THETA:         5.99 [deg]
DELTA_TIME:      -24.00 [sec]
TRIGGER_DUR:     0.512 [sec] 
SOLN_STATUS:     0x10D
RATE_SIGNIF:     13.49 [sigma]
IMAGE_SIGNIF:    8.96 [sigma]
LC_URL:          sw00637765000msb.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:
Sat Apr 11 15:53:43 EDT 2015