TDRSS lightcurve for Trigger=852553

Notes:

GCN BAT Position Notice



GCN BAT Lightcurve Notice


TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 09 Aug 18 20:45:36 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     852553,   Seg_Num: 0
GRB_RA:          299.712d {+19h 58m 51s} (J2000),
                 299.975d {+19h 59m 54s} (current),
                 299.005d {+19h 56m 01s} (1950)
GRB_DEC:         -15.302d {-15d 18' 06"} (J2000),
                 -15.250d {-15d 15' 01"} (current),
                 -15.438d {-15d 26' 18"} (1950)
GRB_DATE:        18339 TJD;   221 DOY;   18/08/09
GRB_TIME:        73728.10 SOD {20:28:48.10} UT
TRIGGER_INDEX:   146
GRB_PHI:         100.30 [deg]
GRB_THETA:        21.68 [deg]
DELTA_TIME:      -70.00 [sec]
TRIGGER_DUR:     


 GCN template for BAT paragraph 


  •  Click here! 

    At 20:28:48 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 180809 ***A*** (trigger=852553).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 299.712, -15.302 which is 
   RA(J2000) = 19h 58m 51s
   Dec(J2000) = -15d 18' 06"
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 ~36817 counts/sec (15-350 keV), at ~35 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
    



     Extended TDRSS lc No.4
    




    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: 46.208 s +/- 2.89772 s
  Estimated T50 duration: 19.2 s +/- 0.746362 s
  Estimated Peak Interval: MET   555539389.31199992 +/- 0.500000 s
  Estimated background rate 1:     5397.296 near MET 555539333.120000 s
  Estimated background rate 2:     4948.435 near MET 555539495.808000 s
  Estimated total duration: 115.456 s (for data selection)
       (from MET 555539341.440000 to MET 555539456.896000)
  Estimated total fluence: 766611.789585 count
  Created GTI with 59 entries
------------------------------------------
 

    

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

    bat_grb_pos_cat.sh 299.712 -15.302 0.083
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: 2018 8 9 20 68.859795  47.087237
 Obj: 2018 8 9 20 263.853941  -32.039251

    

  •  the object visibility at GSFC, Greenbelt, Maryland

     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2018 8 9 20 24.097648  72.681223
 Obj: 2018 8 9 20 242.423368  -60.503461

    

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

     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2018 8 9 20 4.007778  72.286186
 Obj: 2018 8 9 20 231.336959  -63.826246

    

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

     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2018 8 9 20 270.529747  54.252615
 Obj: 2018 8 9 20 102.418062  -72.559900

    

  •  the object visibility at Mauna Kea, Hawaii 

     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2018 8 9 20 257.872593  -10.442475
 Obj: 2018 8 9 20 68.156146  -5.922440

    

  •  the object visibility at Siding Spring Obs., Australia 

     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2018 8 9 20 246.016857  -6.427706
 Obj: 2018 8 9 20 77.453968  -8.780207

    

  •  the object visibility at Tokyo, Japan 

     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2018 8 9 20 108.633235  -1.188394
 Obj: 2018 8 9 20 298.920249  17.137858

    

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

     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2018 8 9 20 128.631367  25.342664
 Obj: 2018 8 9 20 295.283411  -11.281745

    

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

     
 
 
The data/results are in /local/data/bat1/prebascript/trigger852553/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:
Thu Aug  9 16:46:02 EDT 2018