TDRSS lightcurve for Trigger=853790

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 17 Aug 18 20:59:35 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     853790,   Seg_Num: 0
GRB_RA:          192.885d {+12h 51m 32s} (J2000),
                 193.112d {+12h 52m 27s} (current),
                 192.274d {+12h 49m 06s} (1950)
GRB_DEC:         +25.921d {+25d 55' 15"} (J2000),
                 +25.820d {+25d 49' 11"} (current),
                 +26.192d {+26d 11' 33"} (1950)
GRB_ERROR:       4.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=880 [image_cnts]
TRIGGER_DUR:     64.000 [sec] 
TRIGGER_INDEX:   20000     E_range: 15-50 keV
BKG_INTEN:       0 [cnts]
BKG_TIME:        0.00 SOD {00:00:00.00} UT
BKG_DUR:         0 [sec]
GRB_DATE:        18347 TJD;   229 DOY;   18/08/17
GRB_TIME:        75498.55 SOD {20:58:18.55} UT
GRB_PHI:         -13.73 [deg]
GRB_THETA:        38.05 [deg]
SOLN_STATUS:     0x1099D
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    6.12 [sigma]
MERIT_PARAMS:     +0  +0 +125  +6  +1  -4 -100  +0 -71  +1 
SUN_POSTN:       147.19d {+09h 48m 45s}  +13.22d {+13d 13' 09"}
SUN_DIST:         44.83 [deg]   Sun_angle= -3.1 [hr] (East of Sun)
MOON_POSTN:      228.81d {+15h 15m 15s}  -12.73d {-12d 43' 49"}
MOON_DIST:        51.90 [deg]
MOON_ILLUM:      46 [%]
GAL_COORDS:      304.01, 88.79 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      180.66, 28.74 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This is an image trigger.  (The RATE_SIGNIF & BKG_{INTEN, TIME, DUR} are undefined.)  
COMMENTS:        A point_source was found.  
COMMENTS:        This is a low-flux event whose position matches one of the nearby galaxy sources in the on-board catalog!  
COMMENTS:        This matches a source in the on-board catalog: Num=12675=NGC4747,   delta=0.152 [deg].  
COMMENTS:        This matches a source in the ground catalog: NGC4747,   delta=0.152 [deg].  
COMMENTS:        This is a GRB in nearby galaxy or it is noise.  
COMMENTS:        This trigger occurred at longitude,latitude = 288.47,0.44 [deg].

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 17 Aug 18 21:15:31 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     853790,   Seg_Num: 0
GRB_RA:          192.885d {+12h 51m 32s} (J2000),
                 193.112d {+12h 52m 27s} (current),
                 192.274d {+12h 49m 06s} (1950)
GRB_DEC:         +25.921d {+25d 55' 15"} (J2000),
                 +25.820d {+25d 49' 11"} (current),
                 +26.192d {+26d 11' 33"} (1950)
GRB_DATE:        18347 TJD;   229 DOY;   18/08/17
GRB_TIME:        75498.55 SOD {20:58:18.55} UT
TRIGGER_INDEX:   20000
GRB_PHI:         -13.73 [deg]
GRB_THETA:        38.05 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     64.000 [sec] 
SOLN_STATUS:     0x99D
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    6.12 [sigma]
LC_URL:          sw00853790000msb.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:
Fri Aug 17 17:16:03 EDT 2018