TDRSS lightcurve for Trigger=932608

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 31 Oct 19 21:32:19 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     932608,   Seg_Num: 0
GRB_RA:          283.275d {+18h 53m 06s} (J2000),
                 283.411d {+18h 53m 39s} (current),
                 282.932d {+18h 51m 44s} (1950)
GRB_DEC:         +47.639d {+47d 38' 19"} (J2000),
                 +47.664d {+47d 39' 51"} (current),
                 +47.576d {+47d 34' 32"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       1205 [cnts]    Image_Peak=93 [image_cnts]
TRIGGER_DUR:     0.064 [sec] 
TRIGGER_INDEX:   10427     E_range: 50-350 keV
BKG_INTEN:       20423 [cnts]
BKG_TIME:        77000.15 SOD {21:23:20.15} UT
BKG_DUR:         8 [sec]
GRB_DATE:        18787 TJD;   304 DOY;   19/10/31
GRB_TIME:        77011.03 SOD {21:23:31.03} UT
GRB_PHI:         -29.96 [deg]
GRB_THETA:        43.20 [deg]
SOLN_STATUS:     0x20000003
RATE_SIGNIF:     82.86 [sigma]
IMAGE_SIGNIF:    8.55 [sigma]
MERIT_PARAMS:     +1  +0  +0  -4  +3  -1  +0  +0  -6  +0 
SUN_POSTN:       215.80d {+14h 23m 11s}  -14.23d {-14d 13' 40"}
SUN_DIST:         86.16 [deg]   Sun_angle= -4.5 [hr] (East of Sun)
MOON_POSTN:      266.95d {+17h 47m 49s}  -22.24d {-22d 14' 20"}
MOON_DIST:        71.45 [deg]
MOON_ILLUM:      17 [%]
GAL_COORDS:       77.33, 19.43 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      296.69, 69.85 [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:        This trigger occurred at longitude,latitude = 259.17,19.09 [deg].

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 31 Oct 19 21:47:31 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     932608,   Seg_Num: 0
GRB_RA:          283.275d {+18h 53m 06s} (J2000),
                 283.411d {+18h 53m 39s} (current),
                 282.932d {+18h 51m 44s} (1950)
GRB_DEC:         +47.639d {+47d 38' 19"} (J2000),
                 +47.664d {+47d 39' 51"} (current),
                 +47.576d {+47d 34' 32"} (1950)
GRB_DATE:        18787 TJD;   304 DOY;   19/10/31
GRB_TIME:        77011.13 SOD {21:23:31.13} UT
TRIGGER_INDEX:   10427
GRB_PHI:         -29.96 [deg]
GRB_THETA:        43.20 [deg]
DELTA_TIME:      23.00 [sec]
TRIGGER_DUR:     0.064 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     82.86 [sigma]
IMAGE_SIGNIF:    8.55 [sigma]
LC_URL:          sw00932608000msb.lc

GCN template for BAT paragraph

  • Click here! 
    At 21:23:31 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 191031 ***A*** (trigger=932608).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 283.275, +47.639 which is 
   RA(J2000) = 18h 53m 06s
   Dec(J2000) = +47d 38' 19"
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 ~18031 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: 83.712 s +/- 2.89772 s
  Estimated T50 duration: 50.944 s +/- 2.89772 s
  Estimated Peak Interval: MET   594249835.45600009 +/- 0.500000 s
  Estimated background rate 1:     5392.263 near MET 594249823.104000 s
  Estimated background rate 2:     5244.318 near MET 594249976.064000 s
  Estimated total duration: 96 s (for data selection)
       (from MET 594249835.008000 to MET 594249931.008000)
  Estimated total fluence: 7180.862807 count
  Created GTI with 6 entries
------------------------------------------

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

    bat_grb_pos_cat.sh 283.275 47.639 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 283.275 47.639
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: 2019 10 31 21 60.647755  11.630345
 Obj: 2019 10 31 21 204.416524  80.330476
  • the object visibility at GSFC, Greenbelt, Maryland 
     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2019 10 31 21 34.342946  36.917356
 Obj: 2019 10 31 21 230.383522  55.857593
  • the object visibility at MMT, Mt. Hopkins, Arizona 
     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2019 10 31 21 27.137092  38.066802
 Obj: 2019 10 31 21 233.353426  52.910228
  • the object visibility at Hale Telescope, Palomar Mt., California 
     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2019 10 31 21 332.748546  52.088162
 Obj: 2019 10 31 21 224.868877  18.119871
  • the object visibility at Mauna Kea, Hawaii 
     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2019 10 31 21 273.547906  22.241863
 Obj: 2019 10 31 21 229.967133  -55.562190
  • the object visibility at Siding Spring Obs., Australia 
     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2019 10 31 21 282.387005  -7.170218
 Obj: 2019 10 31 21 195.594361  -5.328116
  • the object visibility at Tokyo, Japan 
     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2019 10 31 21 91.560366  -33.557834
 Obj: 2019 10 31 21 130.103995  45.226017
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain 
     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2019 10 31 21 88.356337  26.243079
 Obj: 2019 10 31 21 180.009433  11.963568
  • the object visibility at Gemini South, Cerro Pachon, Chile 
     
 
 
The data/results are in /local/data/bat1/prebascript/trigger932608/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 31 17:47:43 EDT 2019