TDRSS lightcurve for Trigger=1197506

Notes:

GCN BAT Position Notice



GCN BAT Lightcurve Notice


TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 20 Nov 23 00:25:46 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1197506,   Seg_Num: 0
GRB_RA:          299.835d {+19h 59m 20s} (J2000),
                 300.060d {+20h 00m 14s} (current),
                 299.364d {+19h 57m 27s} (1950)
GRB_DEC:         +35.103d {+35d 06' 12"} (J2000),
                 +35.170d {+35d 10' 11"} (current),
                 +34.966d {+34d 57' 57"} (1950)
GRB_DATE:        20268 TJD;   324 DOY;   23/11/20
GRB_TIME:        991.59 SOD {00:16:31.59} UT
TRIGGER_INDEX:   20000
GRB_PHI:         -175.54 [deg]
GRB_THETA:        54.95 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     352.000 [sec]   (=5.9 [min])
SOLN_STATUS:     0x513
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    8.05 [sigma]
LC_URL:          sw01197506000msb.lc




 GCN template for BAT paragraph 


  •  Click here! 

    At 00:16:31 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 231120 ***A*** (trigger=1197506).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 299.835, +35.103 which is 
   RA(J2000) = 19h 59m 20s
   Dec(J2000) = +35d 06' 12"
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 ~921 counts/sec (15-350 keV), at ~7 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 background rate 1:     3402.607 near MET 722132245.568000 s
  Estimated background rate 2:     3347.033 near MET 722132350.528000 s
  Estimated total fluence: 0.000000 count
  Created GTI with 2 entries
------------------------------------------
 

    

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

    bat_grb_pos_cat.sh 299.835 35.103 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 299.835 35.103
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 11 20 0 84.040231  -24.614945
 Obj: 2023 11 20 0 96.470952  57.079534

    

  •  the object visibility at GSFC, Greenbelt, Maryland

     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2023 11 20 0 64.087159  3.872921
 Obj: 2023 11 20 0 121.674143  82.967002

    

  •  the object visibility at MMT, Mt. Hopkins, Arizona 

     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2023 11 20 0 60.482781  7.566171
 Obj: 2023 11 20 0 149.086033  87.873321

    

  •  the object visibility at Hale Telescope, Palomar Mt., California

     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2023 11 20 0 36.180604  42.124668
 Obj: 2023 11 20 0 237.029479  53.822893

    

  •  the object visibility at Mauna Kea, Hawaii 

     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2023 11 20 0 251.564585  62.403638
 Obj: 2023 11 20 0 239.969058  -19.449480

    

  •  the object visibility at Siding Spring Obs., Australia 

     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2023 11 20 0 314.896886  21.433858
 Obj: 2023 11 20 0 230.835008  5.817635

    

  •  the object visibility at Tokyo, Japan 

     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2023 11 20 0 121.075884  -73.760337
 Obj: 2023 11 20 0 125.583067  8.515391

    

  •  the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain

     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2023 11 20 0 61.751529  -7.937115
 Obj: 2023 11 20 0 142.345577  10.816059

    

  •  the object visibility at Gemini South, Cerro Pachon, Chile 

     
 
 
The data/results are in /local/data/bat1/prebascript/trigger1197506/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:
Sun Nov 19 19:29:02 EST 2023