TDRSS lightcurve for Trigger=1400467

Notes:

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

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 01 Oct 25 14:31:20 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1400467,   Seg_Num: 0
GRB_RA:           42.665d {+02h 50m 40s} (J2000),
                  42.953d {+02h 51m 49s} (current),
                  42.104d {+02h 48m 25s} (1950)
GRB_DEC:         -23.020d {-23d 01' 09"} (J2000),
                 -22.914d {-22d 54' 51"} (current),
                 -23.225d {-23d 13' 30"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       3145 [cnts]    Image_Peak=178 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   146     E_range: 25-100 keV
BKG_INTEN:       18354 [cnts]
BKG_TIME:        51427.57 SOD {14:17:07.57} UT
BKG_DUR:         8 [sec]
GRB_DATE:        20949 TJD;   274 DOY;   25/10/01
GRB_TIME:        51440.56 SOD {14:17:20.56} UT
GRB_PHI:         168.55 [deg]
GRB_THETA:        22.43 [deg]
SOLN_STATUS:     0x20000003
RATE_SIGNIF:     15.39 [sigma]
IMAGE_SIGNIF:    7.73 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +2  -2  +0  +0 +73  +0 
SUN_POSTN:       187.96d {+12h 31m 51s}   -3.44d {-03d 26' 08"}
SUN_DIST:        136.88 [deg]   Sun_angle= 9.7 [hr] (West of Sun)
MOON_POSTN:      300.01d {+20h 00m 03s}  -24.74d {-24d 44' 10"}
MOON_DIST:        91.40 [deg]
MOON_ILLUM:      66 [%]
GAL_COORDS:      210.91,-62.76 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       31.62,-37.36 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This Notice was delayed by more than 60 sec past the end of the trigger integration interval;  
COMMENTS:        probably due to it occurring during a Malindi downlink session.  
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 = 172.68,16.75 [deg].  

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 01 Oct 25 14:40:52 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     1400467,   Seg_Num: 0
POINT_RA:         42.663d {+02h 50m 39s} (J2000)
POINT_DEC:       -23.016d {-23d 00' 57"} (J2000)
POINT_ROLL:      123.484d
IMG_START_DATE:  20949 TJD;   274 DOY;   25/10/01
IMG_START_TIME:  52301.09 SOD {14:31:41.09} UT,   860.5 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        4.392
N_STARS:         169
X_OFFSET:        264 [pixels]
Y_OFFSET:        317 [pixels]
X_MAX:           1703 [pixels]
Y_MAX:           1756 [pixels]
DET_THRESH:      17
PHOTO_THRESH:    10
SL_URL:          sw01400467000msufc0860.fits
SUN_POSTN:       187.97d {+12h 31m 52s}   -3.44d {-03d 26' 17"}
SUN_DIST:        136.88 [deg]   Sun_angle= 9.7 [hr] (West of Sun)

GCN template for BAT paragraph

At :: UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB  ***A*** (trigger=1400467).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec ,  which is 
   RA(J2000) = h m s
   Dec(J2000) = d ' "
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a [**double-peaked**]
structure with a duration of about TTT sec.  The peak count rate
was ~0 counts/sec (15-350 keV), at ~ sec after the trigger.

Test version of draft template

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

Tilan's background subtracted TDRSS light curves

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

TDRSS extended lightcurve from T0-1 to T0+2

T50 and T90 calculation

Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)

bat_grb_pos_cat.sh   0.083

Usage: bat_grb_pos_cat.sh   []

   Searches through the BAT GRB position (all numbers in degrees)

Search for this GRB position to the source locations in BAT transient monitor (search radius within 12 arcmin)

python compare_catalog.py  
No match

Link to SIMBAD

Usage elevation_grd_obs.sh (ra) (dec) (UT year) (UT month) (UT day) (UT hour)
 
 
The data/results are in /local/data/bat1/prebascript/trigger1400467/tdrss_ql/
 
bat_raw_lc.fits  : TDRSS FITS light curve from GCN
gcn_position.txt : GCN BAT position notice
ratelc_tdrss.qdp : QDP file of the TDRSS light curve
tdrss_lc.gif     : GIF TDRSS light curve
sc_att.qdp       : QDP file of the spacecraft attitude
sc_att.gif       : GIF spacecraft attitude
bb.gti           : Bayesian block GTI file (battblocks)
dur.gti          : Duration GTI file (battblocks)
battblocks.log   : Output log of battblocks
 

Plot creation:
Wed Oct  1 10:42:02 EDT 2025