TDRSS lightcurve for Trigger=889748

Notes:

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

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 19 Feb 19 19:39:37 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     889748,   Seg_Num: 0
GRB_RA:          189.757d {+12h 39m 02s} (J2000),
                 189.926d {+12h 39m 42s} (current),
                 189.312d {+12h 37m 15s} (1950)
GRB_DEC:         +76.614d {+76d 36' 50"} (J2000),
                 +76.509d {+76d 30' 32"} (current),
                 +76.888d {+76d 53' 18"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       8391 [cnts]    Image_Peak=351 [image_cnts]
TRIGGER_DUR:     4.096 [sec] 
TRIGGER_INDEX:   298     E_range: 25-100 keV
BKG_INTEN:       70664 [cnts]
BKG_TIME:        70681.55 SOD {19:38:01.55} UT
BKG_DUR:         40 [sec]
GRB_DATE:        18533 TJD;    50 DOY;   19/02/19
GRB_TIME:        70738.00 SOD {19:38:58.00} UT
GRB_PHI:         -142.88 [deg]
GRB_THETA:        26.92 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     8.54 [sigma]
IMAGE_SIGNIF:    10.13 [sigma]
MERIT_PARAMS:     +1  +0  +0  +2  +2  +0  +0  +0 +37  +0 
SUN_POSTN:       332.92d {+22h 11m 40s}  -11.16d {-11d 09' 52"}
SUN_DIST:        111.78 [deg]   Sun_angle= 9.5 [hr] (West of Sun)
MOON_POSTN:      156.37d {+10h 25m 28s}  +13.20d {+13d 12' 03"}
MOON_DIST:        65.71 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:      123.88, 40.49 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      123.03, 65.25 [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 = 109.44,8.82 [deg].  

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 19 Feb 19 20:00:38 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     889748,   Seg_Num: 0
GRB_RA:          189.757d {+12h 39m 02s} (J2000),
                 189.926d {+12h 39m 42s} (current),
                 189.312d {+12h 37m 15s} (1950)
GRB_DEC:         +76.614d {+76d 36' 50"} (J2000),
                 +76.509d {+76d 30' 32"} (current),
                 +76.888d {+76d 53' 18"} (1950)
GRB_DATE:        18533 TJD;    50 DOY;   19/02/19
GRB_TIME:        70738.00 SOD {19:38:58.00} UT
TRIGGER_INDEX:   298
GRB_PHI:         -142.88 [deg]
GRB_THETA:        26.92 [deg]
DELTA_TIME:      -43.00 [sec]
TRIGGER_DUR:     4.096 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     8.54 [sigma]
IMAGE_SIGNIF:    10.13 [sigma]
LC_URL:          sw00889748000msb.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 Feb 19 15:01:03 EST 2019