TDRSS lightcurve for Trigger=1000452

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 15 Oct 20 22:50:32 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1000452,   Seg_Num: 0
GRB_RA:          354.343d {+23h 37m 22s} (J2000),
                 354.594d {+23h 38m 23s} (current),
                 353.741d {+23h 34m 58s} (1950)
GRB_DEC:         +53.393d {+53d 23' 36"} (J2000),
                 +53.508d {+53d 30' 30"} (current),
                 +53.116d {+53d 06' 59"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       2630 [cnts]    Image_Peak=115 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   139     E_range: 15-50 keV
BKG_INTEN:       17267 [cnts]
BKG_TIME:        82198.18 SOD {22:49:58.18} UT
BKG_DUR:         8 [sec]
GRB_DATE:        19137 TJD;   289 DOY;   20/10/15
GRB_TIME:        82213.22 SOD {22:50:13.22} UT
GRB_PHI:         -86.30 [deg]
GRB_THETA:        32.23 [deg]
SOLN_STATUS:     0x83
RATE_SIGNIF:     12.32 [sigma]
IMAGE_SIGNIF:    6.85 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +1  -3  +0  +1 +65  +0 
SUN_POSTN:       201.32d {+13h 25m 17s}   -8.96d {-08d 57' 20"}
SUN_DIST:        130.53 [deg]   Sun_angle= -10.2 [hr] (East of Sun)
MOON_POSTN:      191.55d {+12h 46m 12s}   +0.21d {+00d 12' 37"}
MOON_DIST:       124.47 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:      111.91, -7.89 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       24.09, 49.45 [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:        Since the IMAGE_SIGNIF is less than 7 sigma, this is a questionable detection.  
COMMENTS:        This trigger occurred at longitude,latitude = 69.70,1.40 [deg].

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 15 Oct 20 23:07:24 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1000452,   Seg_Num: 0
GRB_RA:          354.343d {+23h 37m 22s} (J2000),
                 354.594d {+23h 38m 23s} (current),
                 353.741d {+23h 34m 58s} (1950)
GRB_DEC:         +53.393d {+53d 23' 36"} (J2000),
                 +53.508d {+53d 30' 30"} (current),
                 +53.116d {+53d 06' 59"} (1950)
GRB_DATE:        19137 TJD;   289 DOY;   20/10/15
GRB_TIME:        82213.22 SOD {22:50:13.22} UT
TRIGGER_INDEX:   139
GRB_PHI:         -86.30 [deg]
GRB_THETA:        32.23 [deg]
DELTA_TIME:      -63.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x83
RATE_SIGNIF:     12.32 [sigma]
IMAGE_SIGNIF:    6.85 [sigma]
LC_URL:          sw01000452000msb.lc

GCN template for BAT paragraph

  • Click here! 
    At 22:50:13 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 201015 ***A*** (trigger=1000452).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 354.343, +53.393 which is 
   RA(J2000) = 23h 37m 22s
   Dec(J2000) = +53d 23' 36"
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 ~1148 counts/sec (15-350 keV), at ~0 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: 6.016 s +/- 0.768 s
  Estimated T50 duration: 2.56 s +/- 0.256 s
  Estimated Peak Interval: MET   624495039.55200005 +/- 0.500000 s
  Estimated background rate 1:     3803.149 near MET 624495026.752000 s
  Estimated background rate 2:     3752.087 near MET 624495134.976000 s
  Estimated total duration: 6.528 s (for data selection)
       (from MET 624495039.104000 to MET 624495045.632000)
  Estimated total fluence: 1155.479959 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 354.343 53.393 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 354.343 53.393
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 15 23 83.772642  -6.612466
 Obj: 2020 10 15 23 229.460870  46.250099
  • the object visibility at GSFC, Greenbelt, Maryland 
     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2020 10 15 23 63.536603  21.874924
 Obj: 2020 10 15 23 219.518553  21.623338
  • the object visibility at MMT, Mt. Hopkins, Arizona 
     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2020 10 15 23 58.604177  25.487465
 Obj: 2020 10 15 23 218.182428  19.753659
  • the object visibility at Hale Telescope, Palomar Mt., California 
     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2020 10 15 23 24.539659  58.605203
 Obj: 2020 10 15 23 202.470508  -9.221202
  • the object visibility at Mauna Kea, Hawaii 
     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2020 10 15 23 250.096813  44.407204
 Obj: 2020 10 15 23 157.107847  -64.949717
  • the object visibility at Siding Spring Obs., Australia 
     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2020 10 15 23 295.863658  19.013678
 Obj: 2020 10 15 23 161.240194  2.333036
  • the object visibility at Tokyo, Japan 
     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2020 10 15 23 119.352515  -55.776489
 Obj: 2020 10 15 23 184.300433  65.129201
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain 
     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2020 10 15 23 78.669536  -1.589085
 Obj: 2020 10 15 23 209.830303  -6.931503
  • the object visibility at Gemini South, Cerro Pachon, Chile 
     
 
 
The data/results are in /local/data/bat1/prebascript/trigger1000452/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 Oct 15 19:07:43 EDT 2020