TDRSS lightcurve for Trigger=831810

Notes:

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

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 10 May 18 19:24:48 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     831810,   Seg_Num: 0
GRB_RA:          276.318d {+18h 25m 16s} (J2000),
                 276.617d {+18h 26m 28s} (current),
                 275.505d {+18h 22m 01s} (1950)
GRB_DEC:         -31.911d {-31d 54' 38"} (J2000),
                 -31.899d {-31d 53' 57"} (current),
                 -31.940d {-31d 56' 21"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       4312 [cnts]    Image_Peak=262 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   147     E_range: 25-100 keV
BKG_INTEN:       24574 [cnts]
BKG_TIME:        69859.07 SOD {19:24:19.07} UT
BKG_DUR:         8 [sec]
GRB_DATE:        18248 TJD;   130 DOY;   18/05/10
GRB_TIME:        69874.30 SOD {19:24:34.30} UT
GRB_PHI:          45.11 [deg]
GRB_THETA:        34.43 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     22.91 [sigma]
IMAGE_SIGNIF:    11.84 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +2  +1  +0  +1 +69  +0 
SUN_POSTN:        47.64d {+03h 10m 35s}  +17.76d {+17d 45' 45"}
SUN_DIST:        133.78 [deg]   Sun_angle= 8.7 [hr] (West of Sun)
MOON_POSTN:      352.72d {+23h 30m 52s}   -6.75d {-06d 45' 05"}
MOON_DIST:        74.65 [deg]
MOON_ILLUM:      25 [%]
GAL_COORDS:        1.54, -8.92 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      275.42, -8.59 [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 = 180.68,-8.46 [deg].  

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 10 May 18 19:42:09 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     831810,   Seg_Num: 0
GRB_RA:          276.318d {+18h 25m 16s} (J2000),
                 276.617d {+18h 26m 28s} (current),
                 275.505d {+18h 22m 01s} (1950)
GRB_DEC:         -31.911d {-31d 54' 38"} (J2000),
                 -31.899d {-31d 53' 57"} (current),
                 -31.940d {-31d 56' 21"} (1950)
GRB_DATE:        18248 TJD;   130 DOY;   18/05/10
GRB_TIME:        69874.30 SOD {19:24:34.30} UT
TRIGGER_INDEX:   147
GRB_PHI:          45.11 [deg]
GRB_THETA:        34.43 [deg]
DELTA_TIME:      77.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     22.91 [sigma]
IMAGE_SIGNIF:    11.84 [sigma]
LC_URL:          sw00831810000msb.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:
Thu May 10 15:42:23 EDT 2018