TDRSS lightcurve for Trigger=987016

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 06 Aug 20 15:29:08 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     987016,   Seg_Num: 0
GRB_RA:           52.905d {+03h 31m 37s} (J2000),
                  53.238d {+03h 32m 57s} (current),
                  52.098d {+03h 28m 24s} (1950)
GRB_DEC:         +37.082d {+37d 04' 55"} (J2000),
                 +37.151d {+37d 09' 03"} (current),
                 +36.912d {+36d 54' 45"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       2665 [cnts]    Image_Peak=195 [image_cnts]
TRIGGER_DUR:     0.512 [sec] 
TRIGGER_INDEX:   124     E_range: 25-100 keV
BKG_INTEN:       25600 [cnts]
BKG_TIME:        55718.58 SOD {15:28:38.58} UT
BKG_DUR:         8 [sec]
GRB_DATE:        19067 TJD;   219 DOY;   20/08/06
GRB_TIME:        55729.91 SOD {15:28:49.91} UT
GRB_PHI:         -24.74 [deg]
GRB_THETA:        38.50 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     24.57 [sigma]
IMAGE_SIGNIF:    11.05 [sigma]
MERIT_PARAMS:     +1  +0  +0  -1  +2  +1  +0  +0 -24  +0 
SUN_POSTN:       137.09d {+09h 08m 21s}  +16.44d {+16d 26' 40"}
SUN_DIST:         75.35 [deg]   Sun_angle= 5.6 [hr] (West of Sun)
MOON_POSTN:      351.96d {+23h 27m 51s}   -8.97d {-08d 57' 59"}
MOON_DIST:        73.49 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:      155.13,-15.58 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       59.71, 17.46 [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 = 252.35,15.31 [deg].

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 06 Aug 20 15:34:08 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     14532607,   Seg_Num: 0
GRB_RA:           52.905d {+03h 31m 37s} (J2000),
                  53.238d {+03h 32m 57s} (current),
                  52.098d {+03h 28m 24s} (1950)
GRB_DEC:         +37.082d {+37d 04' 55"} (J2000),
                 +37.151d {+37d 09' 03"} (current),
                 +36.912d {+36d 54' 45"} (1950)
GRB_DATE:        19067 TJD;   219 DOY;   20/08/06
GRB_TIME:        55729.91 SOD {15:28:49.91} UT
TRIGGER_INDEX:   124
GRB_PHI:         -24.74 [deg]
GRB_THETA:        38.50 [deg]
DELTA_TIME:      1480.00 [sec]
TRIGGER_DUR:     0.512 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    0.00 [sigma]
LC_URL:          sw00987016000msb.lc

GCN template for BAT paragraph

  • Click here! 
    At 15:28:49 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 200806 ***A*** (trigger=987016).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 52.905, +37.082 which is 
   RA(J2000) = 03h 31m 37s
   Dec(J2000) = +37d 04' 55"
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 ~4804 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

    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: 5.376 s +/- 0.181019 s
  Estimated T50 duration: 2.688 s +/- 0.128 s
  Estimated Peak Interval: MET   618420556.22399998 +/- 0.500000 s
  Estimated background rate 1:     6406.124 near MET 618420543.104000 s
  Estimated background rate 2:     8134.943 near MET 618420562.496000 s
  Estimated total duration: 6.784 s (for data selection)
       (from MET 618420555.008000 to MET 618420561.792000)
  Estimated total fluence: 9352.846224 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 52.905 37.082 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 52.905 37.082
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 8 6 15 297.767146  52.849356
 Obj: 2020 8 6 15 103.522414  51.079600
  • the object visibility at GSFC, Greenbelt, Maryland 
     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2020 8 6 15 266.711603  27.134000
 Obj: 2020 8 6 15 116.903767  75.733964
  • the object visibility at MMT, Mt. Hopkins, Arizona 
     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2020 8 6 15 264.436528  22.230787
 Obj: 2020 8 6 15 117.753635  80.986738
  • the object visibility at Hale Telescope, Palomar Mt., California 
     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2020 8 6 15 246.222182  -14.396990
 Obj: 2020 8 6 15 229.081029  59.666659
  • the object visibility at Mauna Kea, Hawaii 
     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2020 8 6 15 320.600769  -71.534272
 Obj: 2020 8 6 15 234.813070  -14.104048
  • the object visibility at Siding Spring Obs., Australia 
     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2020 8 6 15 174.435723  -38.990129
 Obj: 2020 8 6 15 233.400849  12.639907
  • the object visibility at Tokyo, Japan 
     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2020 8 6 15 67.456128  63.788475
 Obj: 2020 8 6 15 130.961212  3.579723
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain 
     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2020 8 6 15 213.756835  35.997685
 Obj: 2020 8 6 15 138.538422  4.592831
  • the object visibility at Gemini South, Cerro Pachon, Chile 
     
 
 
The data/results are in /local/data/bat1/prebascript/trigger987016/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 Aug  6 11:34:53 EDT 2020