TDRSS lightcurve for Trigger=878548

Notes:

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

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 23 Dec 18 02:49:21 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     878548,   Seg_Num: 0
GRB_RA:          247.818d {+16h 31m 16s} (J2000),
                 248.169d {+16h 32m 41s} (current),
                 246.895d {+16h 27m 35s} (1950)
GRB_DEC:         -47.818d {-47d 49' 02"} (J2000),
                 -47.857d {-47d 51' 25"} (current),
                 -47.710d {-47d 42' 36"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=3676 [image_cnts]
TRIGGER_DUR:     104.000 [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:        18475 TJD;   357 DOY;   18/12/23
GRB_TIME:        10041.87 SOD {02:47:21.87} UT
GRB_PHI:         -54.04 [deg]
GRB_THETA:        20.04 [deg]
SOLN_STATUS:     0x11D
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    15.07 [sigma]
MERIT_PARAMS:     +0  +0  +2  +7  +1  +4 -100  +1 -85  +0 
SUN_POSTN:       271.32d {+18h 05m 17s}  -23.43d {-23d 25' 49"}
SUN_DIST:         30.58 [deg]   Sun_angle= 1.5 [hr] (West of Sun)
MOON_POSTN:       96.65d {+06h 26m 36s}  +21.40d {+21d 23' 44"}
MOON_DIST:       145.05 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:      336.28,  0.30 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      253.67,-25.63 [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 matches a source in the on-board catalog: Num=10552=AX_1631.9-4752,   delta=0.140 [deg].  
COMMENTS:        This matches a source in the ground catalog: AX_1631.9-4752,   delta=0.140 [deg].  
COMMENTS:        This is not a GRB.  
COMMENTS:        This is an interesting source.  
COMMENTS:        This trigger occurred at longitude,latitude = 77.49,-3.22 [deg].  

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 23 Dec 18 03:04:11 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     878548,   Seg_Num: 0
GRB_RA:          247.818d {+16h 31m 16s} (J2000),
                 248.169d {+16h 32m 41s} (current),
                 246.895d {+16h 27m 35s} (1950)
GRB_DEC:         -47.818d {-47d 49' 02"} (J2000),
                 -47.857d {-47d 51' 25"} (current),
                 -47.710d {-47d 42' 36"} (1950)
GRB_DATE:        18475 TJD;   357 DOY;   18/12/23
GRB_TIME:        10041.87 SOD {02:47:21.87} UT
TRIGGER_INDEX:   20000
GRB_PHI:         -54.04 [deg]
GRB_THETA:        20.04 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     104.000 [sec] 
SOLN_STATUS:     0x11D
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    15.07 [sigma]
LC_URL:          sw00878548000msb.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 Dec 22 22:04:43 EST 2018