TDRSS lightcurve for Trigger=846740

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 08 Jul 18 13:35:22 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     846740,   Seg_Num: 0
GRB_RA:          198.919d {+13h 15m 41s} (J2000),
                 199.126d {+13h 16m 30s} (current),
                 198.359d {+13h 13m 26s} (1950)
GRB_DEC:         +41.897d {+41d 53' 50"} (J2000),
                 +41.800d {+41d 47' 59"} (current),
                 +42.161d {+42d 09' 40"} (1950)
GRB_ERROR:       4.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=947 [image_cnts]
TRIGGER_DUR:     88.000 [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:        18307 TJD;   189 DOY;   18/07/08
GRB_TIME:        48818.76 SOD {13:33:38.76} UT
GRB_PHI:         -132.08 [deg]
GRB_THETA:        38.33 [deg]
SOLN_STATUS:     0x1099D
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    5.93 [sigma]
MERIT_PARAMS:     +0  +0 +125  +6  +1  -5  +0  +0 -24  +1 
SUN_POSTN:       107.73d {+07h 10m 56s}  +22.44d {+22d 26' 07"}
SUN_DIST:         76.25 [deg]   Sun_angle= -6.1 [hr] (East of Sun)
MOON_POSTN:       42.94d {+02h 51m 46s}  +11.03d {+11d 01' 32"}
MOON_DIST:       122.82 [deg]
MOON_ILLUM:      27 [%]
GAL_COORDS:      105.92, 74.42 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      176.41, 45.13 [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=12103=NGC5055,   delta=0.135 [deg].  
COMMENTS:        This matches a source in the ground catalog: NGC5055,   delta=0.135 [deg].  
COMMENTS:        The position is inside the galaxy NGC5055 (of total mag=8.60 and dia=12.30 arcmin).  
COMMENTS:        There is a 0.03% probability that this would happen by chance coincidence.  
COMMENTS:        This is a GRB in nearby galaxy or it is noise.

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 08 Jul 18 13:50:45 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     846740,   Seg_Num: 0
GRB_RA:          198.919d {+13h 15m 41s} (J2000),
                 199.126d {+13h 16m 30s} (current),
                 198.359d {+13h 13m 26s} (1950)
GRB_DEC:         +41.897d {+41d 53' 50"} (J2000),
                 +41.800d {+41d 47' 59"} (current),
                 +42.161d {+42d 09' 40"} (1950)
GRB_DATE:        18307 TJD;   189 DOY;   18/07/08
GRB_TIME:        48818.76 SOD {13:33:38.76} UT
TRIGGER_INDEX:   20000
GRB_PHI:         -132.08 [deg]
GRB_THETA:        38.33 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     88.000 [sec] 
SOLN_STATUS:     0x99D
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    5.93 [sigma]
LC_URL:          sw00846740000msb.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 Jul  8 09:51:23 EDT 2018