TDRSS lightcurve for Trigger=1216078

Notes:

GCN BAT Position Notice



GCN BAT Lightcurve Notice


TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 18 Feb 24 21:37:54 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     9085451,   Seg_Num: 6
GRB_RA:          135.720d {+09h 02m 53s} (J2000),
                 135.949d {+09h 03m 48s} (current),
                 135.247d {+09h 00m 59s} (1950)
GRB_DEC:         -40.708d {-40d 42' 27"} (J2000),
                 -40.804d {-40d 48' 14"} (current),
                 -40.509d {-40d 30' 32"} (1950)
GRB_DATE:        20358 TJD;    49 DOY;   24/02/18
GRB_TIME:        77495.06 SOD {21:31:35.06} UT
TRIGGER_INDEX:   20000
GRB_PHI:         -18.46 [deg]
GRB_THETA:        30.57 [deg]
DELTA_TIME:      28859.00 [sec]
TRIGGER_DUR:     64.000 [sec] 
SOLN_STATUS:     0x513
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    0.00 [sigma]
LC_URL:          sw01216078000msb.lc




 GCN template for BAT paragraph 


  •  Click here! 

    At 21:31:35 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 240218 ***A*** (trigger=1216078).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 135.720, -40.708 which is 
   RA(J2000) = 09h 02m 53s
   Dec(J2000) = -40d 42' 27"
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 ~1018 counts/sec (15-350 keV), at ~1 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 
    






    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:     3917.594 near MET 729984720.000000 s
  Estimated background rate 2:     3917.594 near MET 729984720.000000 s
  Estimated total fluence: 0.000000 count
  Created GTI with 1 entries
------------------------------------------
 

    

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

    bat_grb_pos_cat.sh 135.720 -40.708 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 135.720 -40.708
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: 2024 2 18 21 56.922366  18.607169
 Obj: 2024 2 18 21 295.867855  -37.795908

    

  •  the object visibility at GSFC, Greenbelt, Maryland

     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2024 2 18 21 27.287850  42.600215
 Obj: 2024 2 18 21 297.782031  -59.826082

    

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

     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2024 2 18 21 19.153042  43.060019
 Obj: 2024 2 18 21 296.099058  -65.075321

    

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

     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2024 2 18 21 320.481429  50.406102
 Obj: 2024 2 18 21 17.387187  -67.803332

    

  •  the object visibility at Mauna Kea, Hawaii 

     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2024 2 18 21 274.881647  14.496155
 Obj: 2024 2 18 21 42.976780  3.190291

    

  •  the object visibility at Siding Spring Obs., Australia 

     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2024 2 18 21 276.022594  -11.880413
 Obj: 2024 2 18 21 57.830581  -28.100319

    

  •  the object visibility at Tokyo, Japan 

     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2024 2 18 21 90.587882  -25.759152
 Obj: 2024 2 18 21 323.742745  5.892463

    

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

     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2024 2 18 21 94.974344  31.543060
 Obj: 2024 2 18 21 311.831763  9.804850

    

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

     
 
 
The data/results are in /local/data/bat1/prebascript/trigger1216078/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 Feb 18 16:38:23 EST 2024