TDRSS lightcurve for Trigger=1342439

Notes:

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

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 14 Aug 25 07:36:23 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1342439,   Seg_Num: 0
GRB_RA:          306.329d {+20h 25m 19s} (J2000),
                 306.527d {+20h 26m 07s} (current),
                 305.941d {+20h 23m 46s} (1950)
GRB_DEC:         +48.391d {+48d 23' 27"} (J2000),
                 +48.476d {+48d 28' 32"} (current),
                 +48.227d {+48d 13' 36"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=2240 [image_cnts]
TRIGGER_DUR:     72.000 [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:        20901 TJD;   226 DOY;   25/08/14
GRB_TIME:        27299.85 SOD {07:34:59.85} UT
GRB_PHI:           9.33 [deg]
GRB_THETA:        38.10 [deg]
SOLN_STATUS:     0x20000013
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    10.55 [sigma]
MERIT_PARAMS:     +1  +0  +0  +6  +1  +0  +0  +1 +42  +0 
SUN_POSTN:       144.15d {+09h 36m 37s}  +14.24d {+14d 14' 39"}
SUN_DIST:        115.35 [deg]   Sun_angle= -10.8 [hr] (East of Sun)
MOON_POSTN:       23.46d {+01h 33m 49s}  +13.21d {+13d 12' 39"}
MOON_DIST:        71.51 [deg]
MOON_ILLUM:      71 [%]
GAL_COORDS:       85.16,  6.06 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      333.82, 64.00 [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 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 = 235.23,-10.37 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This BAT event is temporally(10.0<100sec) coincident with the FERMI_GBM event (trignum=0).  

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 14 Aug 25 07:52:21 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     1342439,   Seg_Num: 0
POINT_RA:        306.328d {+20h 25m 19s} (J2000)
POINT_DEC:       +48.381d {+48d 22' 52"} (J2000)
POINT_ROLL:      340.847d
IMG_START_DATE:  20901 TJD;   226 DOY;   25/08/14
IMG_START_TIME:  28164.28 SOD {07:49:24.28} UT,   864.4 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.318
N_STARS:         190
X_OFFSET:        343 [pixels]
Y_OFFSET:        198 [pixels]
X_MAX:           1782 [pixels]
Y_MAX:           1637 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    6
SL_URL:          sw01342439000msufc0864.fits
SUN_POSTN:       144.16d {+09h 36m 39s}  +14.24d {+14d 14' 26"}
SUN_DIST:        115.36 [deg]   Sun_angle= -10.8 [hr] (East of Sun)

GCN template for BAT paragraph

At :: UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB  ***A*** (trigger=1342439).  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 ~2191 counts/sec (15-350 keV), at ~26 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

******************************************
         battblocks v1.18
------------------------------------------
     Input Data: bat_raw_lc.fits
     Output GTI: bb.gti
 Events to Skip: 128     Changepoint log(prob) Prior: 6.000000
  Internal Tick: 1.000000e-04 s
  Lookback time: 0 s
 Bkg. Subtract?: yes (for fluence/T50/T90 calculations)
------------------------------------------
  Estimated T90 duration: 21.504 s +/- 0.729712 s
  Estimated T50 duration: 11.264 s +/- 0.362039 s
  Estimated Peak Interval: MET   776849762.68799996 +/- 0.500000 s
  Estimated background rate 1:     4329.433 near MET 776849725.760000 s
  Estimated background rate 2:     4400.658 near MET 776849878.912000 s
  Estimated total duration: 96.384 s (for data selection)
       (from MET 776849739.520000 to MET 776849835.904000)
  Estimated total fluence: 8793.887036 count
  Created GTI with 7 entries
------------------------------------------
 

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/trigger1342439/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:
Thu Aug 14 03:52:43 EDT 2025