TDRSS lightcurve for Trigger=848584

Notes:

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

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 18 Jul 18 14:13:04 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     848584,   Seg_Num: 0
GRB_RA:          248.070d {+16h 32m 17s} (J2000),
                 248.413d {+16h 33m 39s} (current),
                 247.146d {+16h 28m 35s} (1950)
GRB_DEC:         -47.809d {-47d 48' 33"} (J2000),
                 -47.848d {-47d 50' 51"} (current),
                 -47.703d {-47d 42' 11"} (1950)
GRB_ERROR:       4.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=4457 [image_cnts]
TRIGGER_DUR:     488.000 [sec]   (=8.1 [min])
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:        18317 TJD;   199 DOY;   18/07/18
GRB_TIME:        50674.71 SOD {14:04:34.71} UT
GRB_PHI:          36.71 [deg]
GRB_THETA:        13.42 [deg]
SOLN_STATUS:     0x99D
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    6.39 [sigma]
MERIT_PARAMS:     +0  +0  +2  +8  +1  -4  +0  +1 +66  +1 
SUN_POSTN:       117.91d {+07h 51m 37s}  +20.96d {+20d 57' 40"}
SUN_DIST:        132.24 [deg]   Sun_angle= -8.7 [hr] (East of Sun)
MOON_POSTN:      191.73d {+12h 46m 56s}   +0.11d {+00d 06' 39"}
MOON_DIST:        68.46 [deg]
MOON_ILLUM:      37 [%]
GAL_COORDS:      336.41,  0.18 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      253.85,-25.59 [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=0.090 [deg].  
COMMENTS:        This matches a source in the ground catalog: AX_1631.9-4752,   delta=0.090 [deg].  
COMMENTS:        This is not a GRB.  
COMMENTS:        This is an interesting source.  
COMMENTS:           
COMMENTS:        The IMAGE_SIGNIF is VERY LOW, this is very likely not real.  

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 18 Jul 18 14:21:36 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     848584,   Seg_Num: 0
GRB_RA:          248.070d {+16h 32m 17s} (J2000),
                 248.413d {+16h 33m 39s} (current),
                 247.146d {+16h 28m 35s} (1950)
GRB_DEC:         -47.809d {-47d 48' 33"} (J2000),
                 -47.848d {-47d 50' 51"} (current),
                 -47.703d {-47d 42' 11"} (1950)
GRB_DATE:        18317 TJD;   199 DOY;   18/07/18
GRB_TIME:        50674.71 SOD {14:04:34.71} UT
TRIGGER_INDEX:   20000
GRB_PHI:          36.71 [deg]
GRB_THETA:        13.42 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     488.000 [sec]   (=8.1 [min])
SOLN_STATUS:     0x99D
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    6.39 [sigma]
LC_URL:          sw00848584000msb.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

Plot creation:
Wed Jul 18 10:22:03 EDT 2018