TDRSS lightcurve for Trigger=850471

Notes:

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

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 28 Jul 18 17:29:15 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     850471,   Seg_Num: 0
GRB_RA:          253.569d {+16h 54m 17s} (J2000),
                 253.944d {+16h 55m 47s} (current),
                 252.562d {+16h 50m 15s} (1950)
GRB_DEC:         -54.031d {-54d 01' 50"} (J2000),
                 -54.060d {-54d 03' 34"} (current),
                 -53.950d {-53d 56' 58"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       2308 [cnts]    Image_Peak=184 [image_cnts]
TRIGGER_DUR:     0.512 [sec] 
TRIGGER_INDEX:   70     E_range: 15-50 keV
BKG_INTEN:       23003 [cnts]
BKG_TIME:        62930.66 SOD {17:28:50.66} UT
BKG_DUR:         8 [sec]
GRB_DATE:        18327 TJD;   209 DOY;   18/07/28
GRB_TIME:        62940.71 SOD {17:29:00.71} UT
GRB_PHI:          15.40 [deg]
GRB_THETA:        35.84 [deg]
SOLN_STATUS:     0x20000003
RATE_SIGNIF:     19.64 [sigma]
IMAGE_SIGNIF:    10.51 [sigma]
MERIT_PARAMS:     +1  +0  +0  -1  +1  +0  +0  +1 +58  +0 
SUN_POSTN:       127.96d {+08h 31m 51s}  +18.87d {+18d 52' 10"}
SUN_DIST:        126.03 [deg]   Sun_angle= -8.4 [hr] (East of Sun)
MOON_POSTN:      317.96d {+21h 11m 49s}  -17.07d {-17d 04' 19"}
MOON_DIST:        61.08 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      333.97, -6.51 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      258.80,-31.23 [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 = 236.54,-20.50 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This BAT event is temporally(2.0<100sec) coincident with the FERMI_GBM event (trignum=554491747).  

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 28 Jul 18 17:46:22 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     850471,   Seg_Num: 0
GRB_RA:          253.569d {+16h 54m 17s} (J2000),
                 253.944d {+16h 55m 47s} (current),
                 252.562d {+16h 50m 15s} (1950)
GRB_DEC:         -54.031d {-54d 01' 50"} (J2000),
                 -54.060d {-54d 03' 34"} (current),
                 -53.950d {-53d 56' 58"} (1950)
GRB_DATE:        18327 TJD;   209 DOY;   18/07/28
GRB_TIME:        62940.71 SOD {17:29:00.71} UT
TRIGGER_INDEX:   70
GRB_PHI:          15.40 [deg]
GRB_THETA:        35.84 [deg]
DELTA_TIME:      -44.00 [sec]
TRIGGER_DUR:     0.512 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     19.64 [sigma]
IMAGE_SIGNIF:    10.51 [sigma]
LC_URL:          sw00850471000msb.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:
Sat Jul 28 13:46:42 EDT 2018