TDRSS lightcurve for Trigger=1003313

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 31 Oct 20 14:21:08 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1003313,   Seg_Num: 0
GRB_RA:          254.277d {+16h 57m 06s} (J2000),
                 254.562d {+16h 58m 15s} (current),
                 253.593d {+16h 54m 22s} (1950)
GRB_DEC:          -9.140d {-09d 08' 23"} (J2000),
                  -9.171d {-09d 10' 16"} (current),
                  -9.063d {-09d 03' 46"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       7959 [cnts]    Image_Peak=245 [image_cnts]
TRIGGER_DUR:     3.072 [sec] 
TRIGGER_INDEX:   487     E_range: 50-350 keV
BKG_INTEN:       80940 [cnts]
BKG_TIME:        51550.09 SOD {14:19:10.09} UT
BKG_DUR:         32 [sec]
GRB_DATE:        19153 TJD;   305 DOY;   20/10/31
GRB_TIME:        51595.21 SOD {14:19:55.21} UT
GRB_PHI:         -57.04 [deg]
GRB_THETA:        20.84 [deg]
SOLN_STATUS:     0x83
RATE_SIGNIF:     13.92 [sigma]
IMAGE_SIGNIF:    6.58 [sigma]
MERIT_PARAMS:     +1  +0  +0  +2  +3  -4 -100  +0 -79  +0 
SUN_POSTN:       216.24d {+14h 24m 59s}  -14.38d {-14d 22' 30"}
SUN_DIST:         37.83 [deg]   Sun_angle= -2.6 [hr] (East of Sun)
MOON_POSTN:       37.26d {+02h 29m 03s}  +11.06d {+11d 03' 32"}
MOON_DIST:       143.25 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:       10.56, 20.36 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      254.03, 13.43 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This Notice was delayed by more than 60 sec past the end of the trigger integration interval;  
COMMENTS:        probably due to it occurring during a Malindi downlink session.  
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.

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 31 Oct 20 14:37:30 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1003313,   Seg_Num: 0
GRB_RA:          254.277d {+16h 57m 06s} (J2000),
                 254.562d {+16h 58m 15s} (current),
                 253.593d {+16h 54m 22s} (1950)
GRB_DEC:          -9.140d {-09d 08' 23"} (J2000),
                  -9.171d {-09d 10' 16"} (current),
                  -9.063d {-09d 03' 46"} (1950)
GRB_DATE:        19153 TJD;   305 DOY;   20/10/31
GRB_TIME:        51595.21 SOD {14:19:55.21} UT
TRIGGER_INDEX:   487
GRB_PHI:         -57.04 [deg]
GRB_THETA:        20.84 [deg]
DELTA_TIME:      -31.00 [sec]
TRIGGER_DUR:     3.072 [sec] 
SOLN_STATUS:     0x83
RATE_SIGNIF:     13.92 [sigma]
IMAGE_SIGNIF:    6.58 [sigma]
LC_URL:          sw01003313000msb.lc

GCN template for BAT paragraph

  • Click here! 
    At 14:19:55 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 201031 ***A*** (trigger=1003313).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 254.277, -9.140 which is 
   RA(J2000) = 16h 57m 06s
   Dec(J2000) = -09d 08' 23"
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 ~2003 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: 99.328 s +/- 56.08 s
  Estimated T50 duration: 73.728 s +/- 54.896 s
  Estimated Peak Interval: MET   625846914.55999994 +/- 0.500000 s
  Estimated background rate 1:    11944.687 near MET 625846798.400000 s
  Estimated background rate 2:    12190.763 near MET 625846984.192000 s
  Estimated total duration: 161.664 s (for data selection)
       (from MET 625846800.000000 to MET 625846961.664000)
  Estimated total fluence: 23984.588499 count
  Created GTI with 7 entries
------------------------------------------

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

    bat_grb_pos_cat.sh 254.277 -9.140 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 254.277 -9.140
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 31 14 313.801233  23.030625
 Obj: 2020 10 31 14 282.391193  0.633626
  • the object visibility at GSFC, Greenbelt, Maryland 
     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2020 10 31 14 288.892478  2.892567
 Obj: 2020 10 31 14 264.324621  -26.568766
  • the object visibility at MMT, Mt. Hopkins, Arizona 
     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2020 10 31 14 285.673878  -2.419089
 Obj: 2020 10 31 14 259.808858  -31.334934
  • the object visibility at Hale Telescope, Palomar Mt., California 
     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2020 10 31 14 274.177540  -34.449376
 Obj: 2020 10 31 14 243.719406  -68.102413
  • the object visibility at Mauna Kea, Hawaii 
     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2020 10 31 14 356.383401  -44.289223
 Obj: 2020 10 31 14 46.151239  -37.095371
  • the object visibility at Siding Spring Obs., Australia 
     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2020 10 31 14 144.421337  -66.361960
 Obj: 2020 10 31 14 105.041039  -36.078976
  • the object visibility at Tokyo, Japan 
     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2020 10 31 14 21.504421  44.241594
 Obj: 2020 10 31 14 326.720914  46.222511
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain 
     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2020 10 31 14 253.475179  52.143485
 Obj: 2020 10 31 14 270.865045  16.875910
  • the object visibility at Gemini South, Cerro Pachon, Chile 
     
 
 
The data/results are in /local/data/bat1/prebascript/trigger1003313/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 31 10:38:25 EDT 2020