TDRSS lightcurve for Trigger=1417793

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 26 Nov 25 19:10:49 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1417793,   Seg_Num: 0
GRB_RA:           99.910d {+06h 39m 39s} (J2000),
                 100.445d {+06h 41m 47s} (current),
                  98.878d {+06h 35m 31s} (1950)
GRB_DEC:         +54.987d {+54d 59' 13"} (J2000),
                 +54.961d {+54d 57' 41"} (current),
                 +55.032d {+55d 01' 56"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       3162 [cnts]    Image_Peak=263 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   146     E_range: 25-100 keV
BKG_INTEN:       15855 [cnts]
BKG_TIME:        69019.24 SOD {19:10:19.24} UT
BKG_DUR:         8 [sec]
GRB_DATE:        21005 TJD;   330 DOY;   25/11/26
GRB_TIME:        69036.65 SOD {19:10:36.65} UT
GRB_PHI:         -32.77 [deg]
GRB_THETA:        17.59 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     23.62 [sigma]
IMAGE_SIGNIF:    12.31 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +2  +2  +0  +0 +72  +0 
SUN_POSTN:       242.83d {+16h 11m 19s}  -21.09d {-21d 05' 17"}
SUN_DIST:        135.97 [deg]   Sun_angle= 9.5 [hr] (West of Sun)
MOON_POSTN:      320.32d {+21h 21m 17s}  -17.84d {-17d 50' 40"}
MOON_DIST:       132.09 [deg]
MOON_ILLUM:      35 [%]
GAL_COORDS:      160.59, 20.32 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       96.67, 31.78 [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 = 64.79,14.86 [deg].

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 26 Nov 25 19:37:05 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     1417793,   Seg_Num: 0
POINT_RA:         99.904d {+06h 39m 37s} (J2000)
POINT_DEC:       +54.985d {+54d 59' 06"} (J2000)
POINT_ROLL:      54.367d
IMG_START_DATE:  21005 TJD;   330 DOY;   25/11/26
IMG_START_TIME:  69334.59 SOD {19:15:34.59} UT,   297.9 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.526
N_STARS:         190
X_OFFSET:        265 [pixels]
Y_OFFSET:        305 [pixels]
X_MAX:           1704 [pixels]
Y_MAX:           1744 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw01417793000msufc0297.fits
SUN_POSTN:       242.85d {+16h 11m 24s}  -21.09d {-21d 05' 29"}
SUN_DIST:        135.98 [deg]   Sun_angle= 9.5 [hr] (West of Sun)

GCN template for BAT paragraph

  • Click here! 
    At :: UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB  ***A*** (trigger=1417793).  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 ~2617 counts/sec (15-350 keV), at ~0 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

    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: 19.328 s +/- 7.552 s
  Estimated T50 duration: 4.992 s +/- 0.384 s
  Estimated Peak Interval: MET   785877073.98399997 +/- 0.500000 s
  Estimated background rate 1:     3807.813 near MET 785877061.440000 s
  Estimated background rate 2:     3731.087 near MET 785877146.880000 s
  Estimated total duration: 42.88 s (for data selection)
       (from MET 785877073.280000 to MET 785877116.160000)
  Estimated total fluence: 9148.494600 count
  Created GTI with 6 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

  • Click here for the SIMBAD search!

    Frank's UVOT result

  • Click here!

    Frank's UVOT Blinking images

  • Click here!

    Elevation angle of GRB/Sun at the ground telescope locations

    Usage elevation_grd_obs.sh (ra) (dec) (UT year) (UT month) (UT day) (UT hour)
 
 
The data/results are in /local/data/bat1/prebascript/trigger1417793/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 Nov 26 14:37:23 EST 2025