TDRSS lightcurve for Trigger=851855

Notes:

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

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 05 Aug 18 13:02:54 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     851855,   Seg_Num: 0
GRB_RA:           25.813d {+01h 43m 15s} (J2000),
                  26.037d {+01h 44m 09s} (current),
                  25.211d {+01h 40m 51s} (1950)
GRB_DEC:         -17.503d {-17d 30' 11"} (J2000),
                 -17.410d {-17d 24' 36"} (current),
                 -17.755d {-17d 45' 15"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       1215 [cnts]    Image_Peak=127 [image_cnts]
TRIGGER_DUR:     0.256 [sec] 
TRIGGER_INDEX:   481     E_range: 50-350 keV
BKG_INTEN:       17063 [cnts]
BKG_TIME:        46946.62 SOD {13:02:26.62} UT
BKG_DUR:         8 [sec]
GRB_DATE:        18335 TJD;   217 DOY;   18/08/05
GRB_TIME:        46956.47 SOD {13:02:36.47} UT
GRB_PHI:         -42.05 [deg]
GRB_THETA:        28.71 [deg]
SOLN_STATUS:     0x20000003
RATE_SIGNIF:     27.98 [sigma]
IMAGE_SIGNIF:    10.44 [sigma]
MERIT_PARAMS:     +1  +0  +0  -2  +3  +0  +0  +0 +39  +0 
SUN_POSTN:       135.54d {+09h 02m 09s}  +16.89d {+16d 53' 25"}
SUN_DIST:        113.06 [deg]   Sun_angle= 7.3 [hr] (West of Sun)
MOON_POSTN:       51.65d {+03h 26m 35s}  +13.58d {+13d 34' 33"}
MOON_DIST:        39.99 [deg]
MOON_ILLUM:      42 [%]
GAL_COORDS:      176.79,-74.65 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       16.93,-26.18 [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 = 176.55,-10.56 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This BAT event is temporally(0.0<100sec) coincident with the FERMI_GBM event (trignum=555166961).  

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 05 Aug 18 13:19:51 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     851855,   Seg_Num: 0
GRB_RA:           25.813d {+01h 43m 15s} (J2000),
                  26.037d {+01h 44m 09s} (current),
                  25.211d {+01h 40m 51s} (1950)
GRB_DEC:         -17.503d {-17d 30' 11"} (J2000),
                 -17.410d {-17d 24' 36"} (current),
                 -17.755d {-17d 45' 15"} (1950)
GRB_DATE:        18335 TJD;   217 DOY;   18/08/05
GRB_TIME:        46956.47 SOD {13:02:36.47} UT
TRIGGER_INDEX:   481
GRB_PHI:         -42.05 [deg]
GRB_THETA:        28.71 [deg]
DELTA_TIME:      -24.00 [sec]
TRIGGER_DUR:     0.256 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     27.98 [sigma]
IMAGE_SIGNIF:    10.44 [sigma]
LC_URL:          sw00851855000msb.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  5 09:20:02 EDT 2018