TDRSS lightcurve for Trigger=989458

Notes:

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

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 16 Aug 20 04:07:57 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     989458,   Seg_Num: 0
GRB_RA:          202.461d {+13h 29m 51s} (J2000),
                 202.744d {+13h 30m 59s} (current),
                 201.777d {+13h 27m 07s} (1950)
GRB_DEC:         -22.590d {-22d 35' 22"} (J2000),
                 -22.696d {-22d 41' 44"} (current),
                 -22.332d {-22d 19' 53"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       6649 [cnts]    Image_Peak=192 [image_cnts]
TRIGGER_DUR:     2.048 [sec] 
TRIGGER_INDEX:   260     E_range: 15-50 keV
BKG_INTEN:       77282 [cnts]
BKG_TIME:        14806.53 SOD {04:06:46.53} UT
BKG_DUR:         24 [sec]
GRB_DATE:        19077 TJD;   229 DOY;   20/08/16
GRB_TIME:        14842.30 SOD {04:07:22.30} UT
GRB_PHI:         -163.27 [deg]
GRB_THETA:        30.32 [deg]
SOLN_STATUS:     0x83
RATE_SIGNIF:     7.87 [sigma]
IMAGE_SIGNIF:    6.58 [sigma]
MERIT_PARAMS:     +1  +0  +0  +1  +1  -4  +0  +0 -40  +0 
SUN_POSTN:       146.08d {+09h 44m 20s}  +13.60d {+13d 35' 51"}
SUN_DIST:         66.29 [deg]   Sun_angle= -3.8 [hr] (East of Sun)
MOON_POSTN:      106.98d {+07h 07m 55s}  +24.08d {+24d 04' 48"}
MOON_DIST:       104.00 [deg]
MOON_ILLUM:      11 [%]
GAL_COORDS:      314.43, 39.42 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      209.18,-12.25 [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 = 234.46,-18.77 [deg].  

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 16 Aug 20 04:24:12 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     989458,   Seg_Num: 0
GRB_RA:          202.461d {+13h 29m 51s} (J2000),
                 202.744d {+13h 30m 59s} (current),
                 201.777d {+13h 27m 07s} (1950)
GRB_DEC:         -22.590d {-22d 35' 22"} (J2000),
                 -22.696d {-22d 41' 44"} (current),
                 -22.332d {-22d 19' 53"} (1950)
GRB_DATE:        19077 TJD;   229 DOY;   20/08/16
GRB_TIME:        14842.30 SOD {04:07:22.30} UT
TRIGGER_INDEX:   260
GRB_PHI:         -163.27 [deg]
GRB_THETA:        30.32 [deg]
DELTA_TIME:      -56.00 [sec]
TRIGGER_DUR:     2.048 [sec] 
SOLN_STATUS:     0x83
RATE_SIGNIF:     7.87 [sigma]
IMAGE_SIGNIF:    6.58 [sigma]
LC_URL:          sw00989458000msb.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 00:24:45 EDT 2020