TDRSS lightcurve for Trigger=1186386

Notes:

GCN BAT Position Notice



GCN BAT Lightcurve Notice


TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 21 Aug 23 15:10:00 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1186386,   Seg_Num: 0
GRB_RA:          297.277d {+19h 49m 06s} (J2000),
                 297.495d {+19h 49m 59s} (current),
                 296.817d {+19h 47m 16s} (1950)
GRB_DEC:         +36.059d {+36d 03' 33"} (J2000),
                 +36.120d {+36d 07' 11"} (current),
                 +35.933d {+35d 55' 58"} (1950)
GRB_DATE:        20177 TJD;   233 DOY;   23/08/21
GRB_TIME:        53520.13 SOD {14:52:00.13} UT
TRIGGER_INDEX:   20000
GRB_PHI:         -159.29 [deg]
GRB_THETA:        51.74 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     


 GCN template for BAT paragraph 


  •  Click here! 

    At 14:52:00 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 230821 ***A*** (trigger=1186386).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 297.277, +36.059 which is 
   RA(J2000) = 19h 49m 06s
   Dec(J2000) = +36d 03' 33"
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 ~0 counts/sec (15-350 keV), at ~ 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
    




    T50 and T90 calculation
    

     

    

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

    bat_grb_pos_cat.sh 297.277 36.059 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 297.277 36.059
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 21 15 303.390235  50.113197
 Obj: 2023 8 21 15 179.838107  -14.912238

    

  •  the object visibility at GSFC, Greenbelt, Maryland

     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2023 8 21 15 271.361422  25.594978
 Obj: 2023 8 21 15 151.965716  -15.041702

    

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

     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2023 8 21 15 268.849260  20.545464
 Obj: 2023 8 21 15 147.929065  -11.073340

    

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

     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2023 8 21 15 250.613964  -15.708068
 Obj: 2023 8 21 15 127.493649  2.951699

    

  •  the object visibility at Mauna Kea, Hawaii 

     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2023 8 21 15 325.682216  -67.465839
 Obj: 2023 8 21 15 143.998345  10.073269

    

  •  the object visibility at Siding Spring Obs., Australia 

     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2023 8 21 15 174.822522  -43.418411
 Obj: 2023 8 21 15 102.571509  66.219035

    

  •  the object visibility at Tokyo, Japan 

     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2023 8 21 15 60.576524  60.704820
 Obj: 2023 8 21 15 223.900360  -4.811245

    

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

     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2023 8 21 15 215.891650  40.109127
 Obj: 2023 8 21 15 218.003692  -82.509375

    

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

     
 
 
The data/results are in /local/data/bat1/prebascript/trigger1186386/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:
Mon Aug 21 11:10:22 EDT 2023