TDRSS lightcurve for Trigger=974942

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 29 May 20 00:57:35 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     974942,   Seg_Num: 0
GRB_RA:          238.751d {+15h 55m 00s} (J2000),
                 239.032d {+15h 56m 08s} (current),
                 238.065d {+15h 52m 16s} (1950)
GRB_DEC:         -11.057d {-11d 03' 25"} (J2000),
                 -11.116d {-11d 06' 57"} (current),
                 -10.911d {-10d 54' 40"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       39306 [cnts]    Image_Peak=1352 [image_cnts]
TRIGGER_DUR:     12.160 [sec] 
TRIGGER_INDEX:   478     E_range: 25-100 keV
BKG_INTEN:       177054 [cnts]
BKG_TIME:        3302.97 SOD {00:55:02.97} UT
BKG_DUR:         64 [sec]
GRB_DATE:        18998 TJD;   150 DOY;   20/05/29
GRB_TIME:        3395.77 SOD {00:56:35.77} UT
GRB_PHI:          61.47 [deg]
GRB_THETA:        29.00 [deg]
SOLN_STATUS:     0x20000003
RATE_SIGNIF:     19.26 [sigma]
IMAGE_SIGNIF:    16.33 [sigma]
MERIT_PARAMS:     +1  +0  +0  +4  +2  +4  +0  +0 +97  +0 
SUN_POSTN:        66.38d {+04h 25m 31s}  +21.66d {+21d 39' 40"}
SUN_DIST:        167.32 [deg]   Sun_angle= -11.5 [hr] (East of Sun)
MOON_POSTN:      147.67d {+09h 50m 40s}  +17.67d {+17d 40' 19"}
MOON_DIST:        94.63 [deg]
MOON_ILLUM:      38 [%]
GAL_COORDS:      358.55, 31.37 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      238.96,  9.08 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This is a rate trigger.  
COMMENTS:        A point_source was found.  
COMMENTS:        This does not match any source in the on-board catalog.  
COMMENTS:        This does not match any source in the ground catalog.  
COMMENTS:        This is a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 40.45,13.14 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This BAT event is temporally(4.0<100sec) coincident with the FERMI_GBM event (trignum=612406604).  

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 29 May 20 01:13:18 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     974942,   Seg_Num: 0
GRB_RA:          238.751d {+15h 55m 00s} (J2000),
                 239.032d {+15h 56m 08s} (current),
                 238.065d {+15h 52m 16s} (1950)
GRB_DEC:         -11.057d {-11d 03' 25"} (J2000),
                 -11.116d {-11d 06' 57"} (current),
                 -10.911d {-10d 54' 40"} (1950)
GRB_DATE:        18998 TJD;   150 DOY;   20/05/29
GRB_TIME:        3395.77 SOD {00:56:35.77} UT
TRIGGER_INDEX:   478
GRB_PHI:          61.47 [deg]
GRB_THETA:        29.00 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     12.160 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     19.26 [sigma]
IMAGE_SIGNIF:    16.33 [sigma]
LC_URL:          sw00974942000msb.lc

GCN template for BAT paragraph

  • Click here!
    At 00:56:35 UT, the Swift Burst Alert Telescope (BAT) triggered and
    located GRB 200529 ***A*** (trigger=974942).  Swift slewed immediately to the burst.
    The BAT on-board calculated location is 
    RA, Dec 238.751, -11.057 which is 
       RA(J2000) = 15h 55m 00s
       Dec(J2000) = -11d 03' 25"
    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 ~1753 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

    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: 143.616 s +/- 4.10399 s
      Estimated T50 duration: 78.592 s +/- 2.90196 s
      Estimated Peak Interval: MET   612406702.27199996 +/- 0.500000 s
      Estimated background rate 1:     5782.670 near MET 612406607.360000 s
      Estimated background rate 2:     5581.543 near MET 612406800.576000 s
      Estimated total duration: 176.512 s (for data selection)
           (from MET 612406617.920000 to MET 612406794.432000)
      Estimated total fluence: 56945.212373 count
      Created GTI with 8 entries
    ------------------------------------------
     
    

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

    bat_grb_pos_cat.sh 238.751 -11.057 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 238.751 -11.057
    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: 2020 5 29 1 124.565413  -6.326234
     Obj: 2020 5 29 1 302.565127  18.793381
    
  • the object visibility at GSFC, Greenbelt, Maryland
     
    MMT Observatory, Mt. Hopkins, Arizona
          TimeUT       Azimuth     Elevation
     Sun: 2020 5 29 1 106.017378  15.808521
     Obj: 2020 5 29 1 280.319203  -4.493705
    
  • the object visibility at MMT, Mt. Hopkins, Arizona
     
    Hale Telescope, Palomar Mountain, California
          TimeUT       Azimuth     Elevation
     Sun: 2020 5 29 1 102.676836  21.109621
     Obj: 2020 5 29 1 276.989988  -9.731258
    
  • the object visibility at Hale Telescope, Palomar Mt., California
     
    Mauna Kea, Hawaii
          TimeUT       Azimuth     Elevation
     Sun: 2020 5 29 1 100.005446  52.926309
     Obj: 2020 5 29 1 266.367568  -44.016146
    
  • the object visibility at Mauna Kea, Hawaii
     
    Siding Spring Obs., Australia
          TimeUT       Azimuth     Elevation
     Sun: 2020 5 29 1 197.959328  34.891314
     Obj: 2020 5 29 1 12.143561  -46.858071
    
  • the object visibility at Siding Spring Obs., Australia
     
    Tokyo, Japan
          TimeUT       Azimuth     Elevation
     Sun: 2020 5 29 1 285.556111  58.854524
     Obj: 2020 5 29 1 129.557792  -57.411754
    
  • the object visibility at Tokyo, Japan
     
    William Herschel Telescope, La Palma, Canary Islands, Spain
          TimeUT       Azimuth     Elevation
     Sun: 2020 5 29 1 176.703552  -39.534879
     Obj: 2020 5 29 1 7.039863  49.859144
    
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
     
    Gemini South, Cerro Pachon, Chile
          TimeUT       Azimuth     Elevation
     Sun: 2020 5 29 1 94.101494  -39.591034
     Obj: 2020 5 29 1 257.557873  41.174550
    
  • the object visibility at Gemini South, Cerro Pachon, Chile
     
     
     
    The data/results are in /local/data/bat1/prebascript/trigger974942/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 May 28 21:13:43 EDT 2020