TDRSS lightcurve for Trigger=748947

Notes:

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

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 19 Apr 17 21:47:50 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     748947,   Seg_Num: 0
GRB_RA:           60.498d {+04h 01m 59s} (J2000),
                  60.697d {+04h 02m 47s} (current),
                  59.923d {+03h 59m 42s} (1950)
GRB_DEC:         -15.143d {-15d 08' 32"} (J2000),
                 -15.095d {-15d 05' 42"} (current),
                 -15.281d {-15d 16' 50"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       4147 [cnts]    Image_Peak=206 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   148     E_range: 25-100 keV
BKG_INTEN:       25172 [cnts]
BKG_TIME:        77613.06 SOD {21:33:33.06} UT
BKG_DUR:         8 [sec]
GRB_DATE:        17862 TJD;   109 DOY;   17/04/19
GRB_TIME:        77626.05 SOD {21:33:46.05} UT
GRB_PHI:         -38.57 [deg]
GRB_THETA:        35.16 [deg]
SOLN_STATUS:     0x20000003
RATE_SIGNIF:     15.62 [sigma]
IMAGE_SIGNIF:    9.51 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +2  +0 -100  +0 -74  +0 
SUN_POSTN:        27.93d {+01h 51m 44s}  +11.48d {+11d 28' 43"}
SUN_DIST:         41.94 [deg]   Sun_angle= -2.2 [hr] (East of Sun)
MOON_POSTN:      307.25d {+20h 28m 59s}  -16.76d {-16d 45' 45"}
MOON_DIST:       107.02 [deg]
MOON_ILLUM:      45 [%]
GAL_COORDS:      207.80,-44.26 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       54.52,-35.02 [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 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 = 259.39,-19.26 [deg].  

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 19 Apr 17 21:50:26 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     748947,   Seg_Num: 0
GRB_RA:           60.498d {+04h 01m 59s} (J2000),
                  60.697d {+04h 02m 47s} (current),
                  59.923d {+03h 59m 42s} (1950)
GRB_DEC:         -15.143d {-15d 08' 32"} (J2000),
                 -15.095d {-15d 05' 42"} (current),
                 -15.281d {-15d 16' 50"} (1950)
GRB_DATE:        17862 TJD;   109 DOY;   17/04/19
GRB_TIME:        77626.05 SOD {21:33:46.05} UT
TRIGGER_INDEX:   148
GRB_PHI:         -38.57 [deg]
GRB_THETA:        35.16 [deg]
DELTA_TIME:      -18.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     15.62 [sigma]
IMAGE_SIGNIF:    9.51 [sigma]
LC_URL:          sw00748947000msb.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

Plot creation:
Wed Apr 19 18:15:57 EDT 2017