TDRSS lightcurve for Trigger=1187199

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 25 Aug 23 18:00:53 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1187199,   Seg_Num: 0
GRB_RA:           83.872d {+05h 35m 29s} (J2000),
                  84.229d {+05h 36m 55s} (current),
                  83.119d {+05h 32m 29s} (1950)
GRB_DEC:         +22.215d {+22d 12' 52"} (J2000),
                 +22.228d {+22d 13' 41"} (current),
                 +22.183d {+22d 10' 59"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=4534 [image_cnts]
TRIGGER_DUR:     64.000 [sec] 
TRIGGER_INDEX:   20000     E_range: 15-50 keV
BKG_INTEN:       0 [cnts]
BKG_TIME:        0.00 SOD {00:00:00.00} UT
BKG_DUR:         0 [sec]
GRB_DATE:        20181 TJD;   237 DOY;   23/08/25
GRB_TIME:        64776.10 SOD {17:59:36.10} UT
GRB_PHI:         133.47 [deg]
GRB_THETA:        11.25 [deg]
SOLN_STATUS:     0x513
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    17.72 [sigma]
MERIT_PARAMS:     +1  +0  +0  +6  +1  +5  +0  +1 -37  +0 
SUN_POSTN:       154.27d {+10h 17m 04s}  +10.66d {+10d 39' 30"}
SUN_DIST:         67.63 [deg]   Sun_angle= 4.7 [hr] (West of Sun)
MOON_POSTN:      257.55d {+17h 10m 12s}  -27.13d {-27d 07' 31"}
MOON_DIST:       172.21 [deg]
MOON_ILLUM:      64 [%]
GAL_COORDS:      184.51, -5.49 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       84.33, -1.10 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This is an image trigger.  (The RATE_SIGNIF & BKG_{INTEN, TIME, DUR} are undefined.)  
COMMENTS:        A point_source was found.  
COMMENTS:        This does not match any source in the on-board catalog.  
COMMENTS:        This matches a source in the ground catalog: Crab,   delta=0.299 [deg].  
COMMENTS:        This is not a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 207.19,-13.39 [deg].  
COMMENTS:           
COMMENTS:        This trigger occured while the StarTracker had lost lock, so it is possibly bogus.  

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 25 Aug 23 18:17:46 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1187199,   Seg_Num: 0
GRB_RA:           83.872d {+05h 35m 29s} (J2000),
                  84.229d {+05h 36m 55s} (current),
                  83.119d {+05h 32m 29s} (1950)
GRB_DEC:         +22.215d {+22d 12' 52"} (J2000),
                 +22.228d {+22d 13' 41"} (current),
                 +22.183d {+22d 10' 59"} (1950)
GRB_DATE:        20181 TJD;   237 DOY;   23/08/25
GRB_TIME:        64776.10 SOD {17:59:36.10} UT
TRIGGER_INDEX:   20000
GRB_PHI:         133.47 [deg]
GRB_THETA:        11.25 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     64.000 [sec] 
SOLN_STATUS:     0x513
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    17.72 [sigma]
LC_URL:          sw01187199000msb.lc

GCN template for BAT paragraph

  • Click here!
    At 17:59:36 UT, the Swift Burst Alert Telescope (BAT) triggered and
    located GRB 230825 ***A*** (trigger=1187199).  Swift slewed immediately to the burst.
    The BAT on-board calculated location is 
    RA, Dec 83.872, +22.215 which is 
       RA(J2000) = 05h 35m 29s
       Dec(J2000) = +22d 12' 52"
    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 ~886 counts/sec (15-350 keV), at ~3 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 background rate 1:     4369.765 near MET 714679288.960000 s
      Estimated background rate 2:     4369.765 near MET 714679288.960000 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 83.872 22.215 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 83.872 22.215
    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 25 18 24.064703  59.656542
     Obj: 2023 8 25 18 103.153746  19.628580
    
  • the object visibility at GSFC, Greenbelt, Maryland
     
    MMT Observatory, Mt. Hopkins, Arizona
          TimeUT       Azimuth     Elevation
     Sun: 2023 8 25 18 311.246659  60.795279
     Obj: 2023 8 25 18 89.786663  46.391140
    
  • the object visibility at MMT, Mt. Hopkins, Arizona
     
    Hale Telescope, Palomar Mountain, California
          TimeUT       Azimuth     Elevation
     Sun: 2023 8 25 18 305.094988  55.795482
     Obj: 2023 8 25 18 84.365250  51.348150
    
  • the object visibility at Hale Telescope, Palomar Mt., California
     
    Mauna Kea, Hawaii
          TimeUT       Azimuth     Elevation
     Sun: 2023 8 25 18 267.395462  25.531777
     Obj: 2023 8 25 18 126.429085  85.906651
    
  • the object visibility at Mauna Kea, Hawaii
     
    Siding Spring Obs., Australia
          TimeUT       Azimuth     Elevation
     Sun: 2023 8 25 18 277.652605  -32.753561
     Obj: 2023 8 25 18 229.610215  16.914879
    
  • the object visibility at Siding Spring Obs., Australia
     
    Tokyo, Japan
          TimeUT       Azimuth     Elevation
     Sun: 2023 8 25 18 228.813508  -30.260355
     Obj: 2023 8 25 18 262.024925  29.526878
    
  • the object visibility at Tokyo, Japan
     
    William Herschel Telescope, La Palma, Canary Islands, Spain
          TimeUT       Azimuth     Elevation
     Sun: 2023 8 25 18 90.554617  21.568370
     Obj: 2023 8 25 18 139.430879  -26.772798
    
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
     
    Gemini South, Cerro Pachon, Chile
          TimeUT       Azimuth     Elevation
     Sun: 2023 8 25 18 154.334369  45.475732
     Obj: 2023 8 25 18 110.315818  -9.459013
    
  • the object visibility at Gemini South, Cerro Pachon, Chile
     
     
     
    The data/results are in /local/data/bat1/prebascript/trigger1187199/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:
    Fri Aug 25 14:18:02 EDT 2023