TDRSS lightcurve for Trigger=1185505

Notes:

GCN BAT Position Notice



GCN BAT Lightcurve Notice


TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 15 Aug 23 11:16:14 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1185505,   Seg_Num: 0
GRB_RA:          184.772d {+12h 19m 05s} (J2000),
                 185.093d {+12h 20m 22s} (current),
                 184.097d {+12h 16m 23s} (1950)
GRB_DEC:         -58.065d {-58d 03' 53"} (J2000),
                 -58.196d {-58d 11' 45"} (current),
                 -57.788d {-57d 47' 14"} (1950)
GRB_DATE:        20171 TJD;   227 DOY;   23/08/15
GRB_TIME:        38995.94 SOD {10:49:55.94} UT
TRIGGER_INDEX:   155
GRB_PHI:          -2.70 [deg]
GRB_THETA:        54.43 [deg]
DELTA_TIME:      -56.00 [sec]
TRIGGER_DUR:     


 GCN template for BAT paragraph 


  •  Click here! 

    At 10:49:55 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 230815 ***A*** (trigger=1185505).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 184.772, -58.065 which is 
   RA(J2000) = 12h 19m 05s
   Dec(J2000) = -58d 03' 53"
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 ~6960 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
    



     Extended TDRSS lc No.3
    




    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: 142.272 s +/- 8.79482 s
  Estimated T50 duration: 46.464 s +/- 39.264 s
  Estimated Peak Interval: MET   713789428.09599996 +/- 0.500000 s
  Estimated background rate 1:     6426.354 near MET 713789408.000000 s
  Estimated background rate 2:     6074.010 near MET 713789598.784000 s
  Estimated total duration: 171.648 s (for data selection)
       (from MET 713789412.800000 to MET 713789584.448000)
  Estimated total fluence: 27115.211914 count
  Created GTI with 13 entries
------------------------------------------
 

    

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

    bat_grb_pos_cat.sh 184.772 -58.065 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 184.772 -58.065
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 8 15 11 256.850025  6.078642
 Obj: 2023 8 15 11 318.574717  -54.975488

    

  •  the object visibility at GSFC, Greenbelt, Maryland

     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2023 8 15 11 236.101452  -22.071045
 Obj: 2023 8 15 11 346.248953  -62.249638

    

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

     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2023 8 15 11 230.988788  -25.140431
 Obj: 2023 8 15 11 352.380088  -64.829695

    

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

     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2023 8 15 11 193.512852  -55.253012
 Obj: 2023 8 15 11 23.560296  -44.992807

    

  •  the object visibility at Mauna Kea, Hawaii 

     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2023 8 15 11 79.526861  -43.294282
 Obj: 2023 8 15 11 35.579206  25.117357

    

  •  the object visibility at Siding Spring Obs., Australia 

     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2023 8 15 11 116.688944  -12.234180
 Obj: 2023 8 15 11 33.322969  -21.813441

    

  •  the object visibility at Tokyo, Japan 

     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2023 8 15 11 287.333021  54.815807
 Obj: 2023 8 15 11 327.907269  -16.785907

    

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

     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2023 8 15 11 256.655471  -5.079293
 Obj: 2023 8 15 11 335.154151  8.555536

    

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

     
 
 
The data/results are in /local/data/bat1/prebascript/trigger1185505/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:
Tue Aug 15 07:18:42 EDT 2023