TDRSS lightcurve for Trigger=1000665

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 17 Oct 20 21:15:57 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1000665,   Seg_Num: 0
GRB_RA:          135.774d {+09h 03m 06s} (J2000),
                 135.972d {+09h 03m 53s} (current),
                 135.300d {+09h 01m 12s} (1950)
GRB_DEC:         -40.448d {-40d 26' 53"} (J2000),
                 -40.532d {-40d 31' 52"} (current),
                 -40.250d {-40d 14' 58"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=1452 [image_cnts]
TRIGGER_DUR:     128.000 [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:        19139 TJD;   291 DOY;   20/10/17
GRB_TIME:        76414.17 SOD {21:13:34.17} UT
GRB_PHI:           9.55 [deg]
GRB_THETA:        45.01 [deg]
SOLN_STATUS:     0x513
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    7.10 [sigma]
MERIT_PARAMS:     +1  +0  +0  +7  +1  -3  +0  +1 -39  +0 
SUN_POSTN:       203.13d {+13h 32m 31s}   -9.66d {-09d 39' 44"}
SUN_DIST:         66.42 [deg]   Sun_angle= 4.5 [hr] (West of Sun)
MOON_POSTN:      218.68d {+14h 34m 42s}  -11.59d {-11d 35' 34"}
MOON_DIST:        76.99 [deg]
MOON_ILLUM:      2 [%]
GAL_COORDS:      263.10,  4.14 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      157.23,-53.74 [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: Vela_X-1,   delta=0.214 [deg].  
COMMENTS:        This is not a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 137.73,-17.18 [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:     Sat 17 Oct 20 21:19:51 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1000665,   Seg_Num: 0
GRB_RA:          135.774d {+09h 03m 06s} (J2000),
                 135.972d {+09h 03m 53s} (current),
                 135.300d {+09h 01m 12s} (1950)
GRB_DEC:         -40.448d {-40d 26' 53"} (J2000),
                 -40.532d {-40d 31' 52"} (current),
                 -40.250d {-40d 14' 58"} (1950)
GRB_DATE:        19139 TJD;   291 DOY;   20/10/17
GRB_TIME:        76414.17 SOD {21:13:34.17} UT
TRIGGER_INDEX:   20000
GRB_PHI:           9.55 [deg]
GRB_THETA:        45.01 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     128.000 [sec] 
SOLN_STATUS:     0x513
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    7.10 [sigma]
LC_URL:          sw01000665000msb.lc

GCN template for BAT paragraph

  • Click here!
    At 21:13:34 UT, the Swift Burst Alert Telescope (BAT) triggered and
    located GRB 201017 ***A*** (trigger=1000665).  Swift slewed immediately to the burst.
    The BAT on-board calculated location is 
    RA, Dec 135.774, -40.448 which is 
       RA(J2000) = 09h 03m 06s
       Dec(J2000) = -40d 26' 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 ~941 counts/sec (15-350 keV), at ~2 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

    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: 156.672 s +/- 36.1785 s
      Estimated T50 duration: 156.672 s +/- 81.9728 s
      Estimated Peak Interval: MET   624662076.92799997 +/- 0.500000 s
      Estimated background rate 1:     4053.202 near MET 624662040.576000 s
      Estimated background rate 2:     4483.398 near MET 624662223.872000 s
      Estimated total duration: 156.672 s (for data selection)
           (from MET 624662065.152000 to MET 624662221.824000)
      Estimated total fluence: -22187.041178 count
      Created GTI with 4 entries
    ------------------------------------------
     
    

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

    bat_grb_pos_cat.sh 135.774 -40.448 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 135.774 -40.448
    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 10 17 21 63.662904  15.149126
     Obj: 2020 10 17 21 70.783779  -50.961790
    
  • the object visibility at GSFC, Greenbelt, Maryland
     
    MMT Observatory, Mt. Hopkins, Arizona
          TimeUT       Azimuth     Elevation
     Sun: 2020 10 17 21 36.892461  41.049001
     Obj: 2020 10 17 21 55.445082  -23.100177
    
  • the object visibility at MMT, Mt. Hopkins, Arizona
     
    Hale Telescope, Palomar Mountain, California
          TimeUT       Azimuth     Elevation
     Sun: 2020 10 17 21 29.082643  42.401621
     Obj: 2020 10 17 21 53.910436  -19.945694
    
  • the object visibility at Hale Telescope, Palomar Mt., California
     
    Mauna Kea, Hawaii
          TimeUT       Azimuth     Elevation
     Sun: 2020 10 17 21 328.506666  55.935500
     Obj: 2020 10 17 21 36.785155  13.857184
    
  • the object visibility at Mauna Kea, Hawaii
     
    Siding Spring Obs., Australia
          TimeUT       Azimuth     Elevation
     Sun: 2020 10 17 21 269.478723  19.682421
     Obj: 2020 10 17 21 335.561703  79.710221
    
  • the object visibility at Siding Spring Obs., Australia
     
    Tokyo, Japan
          TimeUT       Azimuth     Elevation
     Sun: 2020 10 17 21 278.363835  -4.940971
     Obj: 2020 10 17 21 342.910477  12.290109
    
  • the object visibility at Tokyo, Japan
     
    William Herschel Telescope, La Palma, Canary Islands, Spain
          TimeUT       Azimuth     Elevation
     Sun: 2020 10 17 21 96.187538  -31.171724
     Obj: 2020 10 17 21 334.495850  -76.734576
    
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
     
    Gemini South, Cerro Pachon, Chile
          TimeUT       Azimuth     Elevation
     Sun: 2020 10 17 21 93.012969  24.432339
     Obj: 2020 10 17 21 33.227759  -7.536187
    
  • the object visibility at Gemini South, Cerro Pachon, Chile
     
     
     
    The data/results are in /local/data/bat1/prebascript/trigger1000665/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:
    Sat Oct 17 17:24:08 EDT 2020