TDRSS lightcurve for Trigger=900285

Notes:

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

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 24 Apr 19 10:01:01 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     900285,   Seg_Num: 0
GRB_RA:           48.681d {+03h 14m 43s} (J2000),
                  48.958d {+03h 15m 50s} (current),
                  47.964d {+03h 11m 51s} (1950)
GRB_DEC:         +20.233d {+20d 14' 00"} (J2000),
                 +20.304d {+20d 18' 15"} (current),
                 +20.048d {+20d 02' 54"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       2700 [cnts]    Image_Peak=111 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   148     E_range: 25-100 keV
BKG_INTEN:       15713 [cnts]
BKG_TIME:        36025.20 SOD {10:00:25.20} UT
BKG_DUR:         8 [sec]
GRB_DATE:        18597 TJD;   114 DOY;   19/04/24
GRB_TIME:        36043.19 SOD {10:00:43.19} UT
GRB_PHI:         -74.86 [deg]
GRB_THETA:        33.71 [deg]
SOLN_STATUS:     0x83
RATE_SIGNIF:     15.16 [sigma]
IMAGE_SIGNIF:    6.72 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +2  -3 -100  +0 -95  +0 
SUN_POSTN:        31.70d {+02h 06m 49s}  +12.83d {+12d 49' 60"}
SUN_DIST:         18.13 [deg]   Sun_angle= -1.2 [hr] (East of Sun)
MOON_POSTN:      276.39d {+18h 25m 35s}  -22.02d {-22d 00' 58"}
MOON_DIST:       135.91 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      162.92,-31.29 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       51.69,  2.12 [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:        Since the IMAGE_SIGNIF is less than 7 sigma, this is a questionable detection.  
COMMENTS:        This trigger occurred at longitude,latitude = 93.12,4.10 [deg].  

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 24 Apr 19 10:18:21 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     900285,   Seg_Num: 0
GRB_RA:           48.681d {+03h 14m 43s} (J2000),
                  48.958d {+03h 15m 50s} (current),
                  47.964d {+03h 11m 51s} (1950)
GRB_DEC:         +20.233d {+20d 14' 00"} (J2000),
                 +20.304d {+20d 18' 15"} (current),
                 +20.048d {+20d 02' 54"} (1950)
GRB_DATE:        18597 TJD;   114 DOY;   19/04/24
GRB_TIME:        36043.19 SOD {10:00:43.19} UT
TRIGGER_INDEX:   148
GRB_PHI:         -74.86 [deg]
GRB_THETA:        33.71 [deg]
DELTA_TIME:      -37.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x83
RATE_SIGNIF:     15.16 [sigma]
IMAGE_SIGNIF:    6.72 [sigma]
LC_URL:          sw00900285000msb.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

Plot creation:
Wed Apr 24 06:18:43 EDT 2019