TDRSS lightcurve for Trigger=811561

Notes:

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

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 24 Feb 18 22:21:21 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     811561,   Seg_Num: 0
GRB_RA:          202.661d {+13h 30m 39s} (J2000),
                 202.863d {+13h 31m 27s} (current),
                 202.104d {+13h 28m 25s} (1950)
GRB_DEC:         +38.088d {+38d 05' 17"} (J2000),
                 +37.995d {+37d 59' 42"} (current),
                 +38.346d {+38d 20' 44"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       3775 [cnts]    Image_Peak=232 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   137     E_range: 15-50 keV
BKG_INTEN:       22237 [cnts]
BKG_TIME:        80451.46 SOD {22:20:51.46} UT
BKG_DUR:         8 [sec]
GRB_DATE:        18173 TJD;    55 DOY;   18/02/24
GRB_TIME:        80467.72 SOD {22:21:07.72} UT
GRB_PHI:         -34.65 [deg]
GRB_THETA:        19.38 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     16.30 [sigma]
IMAGE_SIGNIF:    10.08 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +1  +0  +0  +0 +65  +0 
SUN_POSTN:       338.02d {+22h 32m 06s}   -9.21d {-09d 12' 49"}
SUN_DIST:        130.55 [deg]   Sun_angle= 9.0 [hr] (West of Sun)
MOON_POSTN:       87.15d {+05h 48m 35s}  +19.62d {+19d 37' 25"}
MOON_DIST:        96.62 [deg]
MOON_ILLUM:      68 [%]
GAL_COORDS:       88.49, 76.30 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      182.59, 43.36 [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 = 70.87,11.82 [deg].  

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 24 Feb 18 22:43:58 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     811561,   Seg_Num: 0
GRB_RA:          202.661d {+13h 30m 39s} (J2000),
                 202.863d {+13h 31m 27s} (current),
                 202.104d {+13h 28m 25s} (1950)
GRB_DEC:         +38.088d {+38d 05' 17"} (J2000),
                 +37.995d {+37d 59' 42"} (current),
                 +38.346d {+38d 20' 44"} (1950)
GRB_DATE:        18173 TJD;    55 DOY;   18/02/24
GRB_TIME:        80467.72 SOD {22:21:07.72} UT
TRIGGER_INDEX:   137
GRB_PHI:         -34.65 [deg]
GRB_THETA:        19.38 [deg]
DELTA_TIME:      -24.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     16.30 [sigma]
IMAGE_SIGNIF:    10.08 [sigma]
LC_URL:          sw00811561000msb.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:
Sat Feb 24 17:44:43 EST 2018