TDRSS lightcurve for Trigger=874754

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 04 Dec 18 20:29:36 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     874754,   Seg_Num: 0
GRB_RA:          188.083d {+12h 32m 20s} (J2000),
                 188.321d {+12h 33m 17s} (current),
                 187.453d {+12h 29m 49s} (1950)
GRB_DEC:         +16.309d {+16d 18' 32"} (J2000),
                 +16.205d {+16d 12' 16"} (current),
                 +16.585d {+16d 35' 05"} (1950)
GRB_ERROR:       4.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=790 [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:        18456 TJD;   338 DOY;   18/12/04
GRB_TIME:        73697.97 SOD {20:28:17.97} UT
GRB_PHI:         -16.72 [deg]
GRB_THETA:        35.09 [deg]
SOLN_STATUS:     0x1099D
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    5.99 [sigma]
MERIT_PARAMS:     +0  +0 +125  +6  +1  -5  +0  +0 -29  +1 
SUN_POSTN:       251.19d {+16h 44m 45s}  -22.31d {-22d 18' 33"}
SUN_DIST:         72.59 [deg]   Sun_angle= 4.2 [hr] (West of Sun)
MOON_POSTN:      222.57d {+14h 50m 17s}  -11.18d {-11d 10' 30"}
MOON_DIST:        43.56 [deg]
MOON_ILLUM:      6 [%]
GAL_COORDS:      279.70, 78.31 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      180.73, 18.14 [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=12571=NGC4515,   delta=0.185 [deg].  
COMMENTS:        This matches a source in the ground catalog: NGC4515,   delta=0.185 [deg].  
COMMENTS:        This is a GRB in nearby galaxy or it is noise.  
COMMENTS:        This trigger occurred at longitude,latitude = 181.31,-11.81 [deg].  

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 04 Dec 18 20:45:35 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     874754,   Seg_Num: 0
GRB_RA:          188.083d {+12h 32m 20s} (J2000),
                 188.321d {+12h 33m 17s} (current),
                 187.453d {+12h 29m 49s} (1950)
GRB_DEC:         +16.309d {+16d 18' 32"} (J2000),
                 +16.205d {+16d 12' 16"} (current),
                 +16.585d {+16d 35' 05"} (1950)
GRB_DATE:        18456 TJD;   338 DOY;   18/12/04
GRB_TIME:        73697.97 SOD {20:28:17.97} UT
TRIGGER_INDEX:   20000
GRB_PHI:         -16.72 [deg]
GRB_THETA:        35.09 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     64.000 [sec] 
SOLN_STATUS:     0x99D
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    5.99 [sigma]
LC_URL:          sw00874754000msb.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:
Tue Dec  4 15:46:02 EST 2018