TDRSS lightcurve for Trigger=990358

Notes:

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

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 17 Aug 20 01:53:40 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     990358,   Seg_Num: 0
GRB_RA:          154.131d {+10h 16m 31s} (J2000),
                 154.361d {+10h 17m 27s} (current),
                 153.572d {+10h 14m 17s} (1950)
GRB_DEC:         -33.921d {-33d 55' 16"} (J2000),
                 -34.025d {-34d 01' 28"} (current),
                 -33.671d {-33d 40' 16"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       742 [cnts]    Image_Peak=64 [image_cnts]
TRIGGER_DUR:     0.256 [sec] 
TRIGGER_INDEX:   94     E_range: 25-100 keV
BKG_INTEN:       23185 [cnts]
BKG_TIME:        6790.52 SOD {01:53:10.52} UT
BKG_DUR:         8 [sec]
GRB_DATE:        19078 TJD;   230 DOY;   20/08/17
GRB_TIME:        6801.08 SOD {01:53:21.08} UT
GRB_PHI:         -23.10 [deg]
GRB_THETA:        19.71 [deg]
SOLN_STATUS:     0x83
RATE_SIGNIF:     19.67 [sigma]
IMAGE_SIGNIF:    6.58 [sigma]
MERIT_PARAMS:     +1  +0  +0  -2  +2  -4  +0  +0 -67  +0 
SUN_POSTN:       146.93d {+09h 47m 43s}  +13.31d {+13d 18' 31"}
SUN_DIST:         47.86 [deg]   Sun_angle= -0.5 [hr] (East of Sun)
MOON_POSTN:      120.40d {+08h 01m 36s}  +23.09d {+23d 05' 16"}
MOON_DIST:        65.61 [deg]
MOON_ILLUM:      5 [%]
GAL_COORDS:      269.68, 18.76 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      171.60,-41.00 [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 = 143.09,1.16 [deg].  

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 17 Aug 20 02:16:56 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     990358,   Seg_Num: 0
GRB_RA:          154.131d {+10h 16m 31s} (J2000),
                 154.361d {+10h 17m 27s} (current),
                 153.572d {+10h 14m 17s} (1950)
GRB_DEC:         -33.921d {-33d 55' 16"} (J2000),
                 -34.025d {-34d 01' 28"} (current),
                 -33.671d {-33d 40' 16"} (1950)
GRB_DATE:        19078 TJD;   230 DOY;   20/08/17
GRB_TIME:        6801.08 SOD {01:53:21.08} UT
TRIGGER_INDEX:   94
GRB_PHI:         -23.10 [deg]
GRB_THETA:        19.71 [deg]
DELTA_TIME:      64.00 [sec]
TRIGGER_DUR:     0.256 [sec] 
SOLN_STATUS:     0x83
RATE_SIGNIF:     19.67 [sigma]
IMAGE_SIGNIF:    6.58 [sigma]
LC_URL:          sw00990358000msb.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 Aug 16 22:17:27 EDT 2020