TDRSS lightcurve for Trigger=1192251

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 16 Sep 23 04:13:31 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1192251,   Seg_Num: 0
GRB_RA:          261.774d {+17h 27m 06s} (J2000),
                 262.118d {+17h 28m 28s} (current),
                 261.049d {+17h 24m 12s} (1950)
GRB_DEC:         -17.032d {-17d 01' 55"} (J2000),
                 -17.051d {-17d 03' 01"} (current),
                 -16.991d {-16d 59' 25"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=8066 [image_cnts]
TRIGGER_DUR:     64.000 [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:        20203 TJD;   259 DOY;   23/09/16
GRB_TIME:        15135.98 SOD {04:12:15.98} UT
GRB_PHI:           3.02 [deg]
GRB_THETA:        32.13 [deg]
SOLN_STATUS:     0x413
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    21.96 [sigma]
MERIT_PARAMS:     +1  +0  +0  +6  +1  +7  +0  +1  -1  +0 
SUN_POSTN:       173.62d {+11h 34m 30s}   +2.76d {+02d 45' 20"}
SUN_DIST:         89.37 [deg]   Sun_angle= -5.9 [hr] (East of Sun)
MOON_POSTN:      185.71d {+12h 22m 50s}   -0.49d {-00d 29' 37"}
MOON_DIST:        76.87 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:        7.85,  9.94 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      262.09,  6.18 [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 = 139.62,-13.14 [deg].  
COMMENTS:           
COMMENTS:        This trigger occured while the StarTracker had lost lock, so it is possibly bogus.

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 16 Sep 23 04:16:21 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1192251,   Seg_Num: 0
GRB_RA:          261.774d {+17h 27m 06s} (J2000),
                 262.118d {+17h 28m 28s} (current),
                 261.049d {+17h 24m 12s} (1950)
GRB_DEC:         -17.032d {-17d 01' 55"} (J2000),
                 -17.051d {-17d 03' 01"} (current),
                 -16.991d {-16d 59' 25"} (1950)
GRB_DATE:        20203 TJD;   259 DOY;   23/09/16
GRB_TIME:        15135.98 SOD {04:12:15.98} UT
TRIGGER_INDEX:   20000
GRB_PHI:           3.02 [deg]
GRB_THETA:        32.13 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     64.000 [sec] 
SOLN_STATUS:     0x413
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    21.96 [sigma]
LC_URL:          sw01192251000msb.lc

GCN template for BAT paragraph

  • Click here! 
    At 04:12:15 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 230916 ***A*** (trigger=1192251).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 261.774, -17.032 which is 
   RA(J2000) = 17h 27m 06s
   Dec(J2000) = -17d 01' 55"
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 ~1210 counts/sec (15-350 keV), at ~138 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

    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: 45.056 s +/- 16.8882 s
  Estimated T50 duration: 45.056 s +/- 29.5367 s
  Estimated Peak Interval: MET   716530478.14399993 +/- 0.500000 s
  Estimated background rate 1:     4830.400 near MET 716530387.520000 s
  Estimated background rate 2:     5300.743 near MET 716530515.008000 s
  Estimated total duration: 45.056 s (for data selection)
       (from MET 716530431.040000 to MET 716530476.096000)
  Estimated total fluence: -4584.137256 count
  Created GTI with 4 entries
------------------------------------------

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

    bat_grb_pos_cat.sh 261.774 -17.032 0.083
No match

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

    python compare_catalog.py 261.774 -17.032
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

    GSFC, Greenbelt, Maryland
      TimeUT       Azimuth     Elevation
 Sun: 2023 9 16 4 156.579819  -45.694652
 Obj: 2023 9 16 4 67.669009  0.150324
  • the object visibility at GSFC, Greenbelt, Maryland 
     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2023 9 16 4 116.191533  -31.324113
 Obj: 2023 9 16 4 45.240543  27.136532
  • the object visibility at MMT, Mt. Hopkins, Arizona 
     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2023 9 16 4 112.660765  -26.043917
 Obj: 2023 9 16 4 39.412649  29.304982
  • the object visibility at Hale Telescope, Palomar Mt., California 
     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2023 9 16 4 90.996547  5.344884
 Obj: 2023 9 16 4 354.874977  52.956302
  • the object visibility at Mauna Kea, Hawaii 
     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2023 9 16 4 134.695216  45.675094
 Obj: 2023 9 16 4 269.479500  35.198013
  • the object visibility at Siding Spring Obs., Australia 
     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2023 9 16 4 24.085656  56.034750
 Obj: 2023 9 16 4 292.280904  1.934119
  • the object visibility at Tokyo, Japan 
     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2023 9 16 4 239.862219  -38.257794
 Obj: 2023 9 16 4 95.387646  -46.664317
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain 
     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2023 9 16 4 21.331881  -60.783590
 Obj: 2023 9 16 4 79.233850  15.837568
  • the object visibility at Gemini South, Cerro Pachon, Chile 
     
 
 
The data/results are in /local/data/bat1/prebascript/trigger1192251/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:
Sat Sep 16 00:19:03 EDT 2023