TDRSS lightcurve for Trigger=900730

Notes:

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

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 27 Apr 19 04:34:29 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     900730,   Seg_Num: 0
GRB_RA:          280.213d {+18h 40m 51s} (J2000),
                 280.370d {+18h 41m 29s} (current),
                 279.805d {+18h 39m 13s} (1950)
GRB_DEC:         +40.322d {+40d 19' 20"} (J2000),
                 +40.342d {+40d 20' 29"} (current),
                 +40.274d {+40d 16' 26"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       542 [cnts]    Image_Peak=90 [image_cnts]
TRIGGER_DUR:     0.032 [sec] 
TRIGGER_INDEX:   10318     E_range: 25-100 keV
BKG_INTEN:       14420 [cnts]
BKG_TIME:        16441.19 SOD {04:34:01.19} UT
BKG_DUR:         8 [sec]
GRB_DATE:        18600 TJD;   117 DOY;   19/04/27
GRB_TIME:        16454.95 SOD {04:34:14.95} UT
GRB_PHI:         148.52 [deg]
GRB_THETA:        24.57 [deg]
SOLN_STATUS:     0x20000003
RATE_SIGNIF:     54.54 [sigma]
IMAGE_SIGNIF:    11.10 [sigma]
MERIT_PARAMS:     +1  +0  +0  -5  +2  +1  +0  +0 +14  +0 
SUN_POSTN:        34.32d {+02h 17m 16s}  +13.73d {+13d 44' 02"}
SUN_DIST:         98.44 [deg]   Sun_angle= 7.6 [hr] (West of Sun)
MOON_POSTN:      312.34d {+20h 49m 22s}  -19.44d {-19d 26' 32"}
MOON_DIST:        66.78 [deg]
MOON_ILLUM:      48 [%]
GAL_COORDS:       69.25, 19.05 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      287.41, 63.15 [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 = 88.92,-16.71 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This BAT event is temporally(1.0<100sec) coincident with the FERMI_GBM event (trignum=578032460).  

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 27 Apr 19 04:50:54 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     900730,   Seg_Num: 0
GRB_RA:          280.213d {+18h 40m 51s} (J2000),
                 280.370d {+18h 41m 29s} (current),
                 279.805d {+18h 39m 13s} (1950)
GRB_DEC:         +40.322d {+40d 19' 20"} (J2000),
                 +40.342d {+40d 20' 29"} (current),
                 +40.274d {+40d 16' 26"} (1950)
GRB_DATE:        18600 TJD;   117 DOY;   19/04/27
GRB_TIME:        16455.07 SOD {04:34:15.07} UT
TRIGGER_INDEX:   10318
GRB_PHI:         148.52 [deg]
GRB_THETA:        24.57 [deg]
DELTA_TIME:      52.00 [sec]
TRIGGER_DUR:     0.032 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     54.54 [sigma]
IMAGE_SIGNIF:    11.10 [sigma]
LC_URL:          sw00900730000msb.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 27 00:51:22 EDT 2019