TDRSS lightcurve for Trigger=1069788

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 22 Aug 21 09:18:32 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1069788,   Seg_Num: 0
GRB_RA:          304.476d {+20h 17m 54s} (J2000),
                 304.744d {+20h 18m 59s} (current),
                 303.857d {+20h 15m 26s} (1950)
GRB_DEC:          +5.265d {+05d 15' 54"} (J2000),
                  +5.333d {+05d 20' 00"} (current),
                  +5.109d {+05d 06' 31"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       3069 [cnts]    Image_Peak=530 [image_cnts]
TRIGGER_DUR:     0.128 [sec] 
TRIGGER_INDEX:   122     E_range: 25-100 keV
BKG_INTEN:       18957 [cnts]
BKG_TIME:        33484.40 SOD {09:18:04.40} UT
BKG_DUR:         8 [sec]
GRB_DATE:        19448 TJD;   234 DOY;   21/08/22
GRB_TIME:        33498.16 SOD {09:18:18.16} UT
GRB_PHI:          49.49 [deg]
GRB_THETA:        24.34 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     157.56 [sigma]
IMAGE_SIGNIF:    18.75 [sigma]
MERIT_PARAMS:     +1  +0  +0  -3  +2  +6  +0  +0 +84  +0 
SUN_POSTN:       151.62d {+10h 06m 29s}  +11.64d {+11d 38' 29"}
SUN_DIST:        148.33 [deg]   Sun_angle= -10.2 [hr] (East of Sun)
MOON_POSTN:      331.94d {+22h 07m 45s}  -16.81d {-16d 48' 49"}
MOON_DIST:        34.83 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:       47.98,-16.54 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      308.19, 24.25 [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 = 193.42,17.38 [deg].

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 22 Aug 21 09:35:34 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1069788,   Seg_Num: 0
GRB_RA:          304.476d {+20h 17m 54s} (J2000),
                 304.744d {+20h 18m 59s} (current),
                 303.857d {+20h 15m 26s} (1950)
GRB_DEC:          +5.265d {+05d 15' 54"} (J2000),
                  +5.333d {+05d 20' 00"} (current),
                  +5.109d {+05d 06' 31"} (1950)
GRB_DATE:        19448 TJD;   234 DOY;   21/08/22
GRB_TIME:        33498.16 SOD {09:18:18.16} UT
TRIGGER_INDEX:   122
GRB_PHI:          49.49 [deg]
GRB_THETA:        24.34 [deg]
DELTA_TIME:      64.00 [sec]
TRIGGER_DUR:     0.128 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     157.56 [sigma]
IMAGE_SIGNIF:    18.75 [sigma]
LC_URL:          sw01069788000msb.lc

GCN template for BAT paragraph

  • Click here! 
    At 09:18:18 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 210822 ***A*** (trigger=1069788).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 304.476, +5.265 which is 
   RA(J2000) = 20h 17m 54s
   Dec(J2000) = +05d 15' 54"
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 ~38170 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: 34.816 s +/- 1.024 s
  Estimated T50 duration: 7.424 s +/- 0.202386 s
  Estimated Peak Interval: MET   651316726.27200007 +/- 0.500000 s
  Estimated background rate 1:     4741.753 near MET 651316713.920000 s
  Estimated background rate 2:     4755.283 near MET 651316861.120000 s
  Estimated total duration: 84.48 s (for data selection)
       (from MET 651316725.440000 to MET 651316809.920000)
  Estimated total fluence: 222262.090482 count
  Created GTI with 56 entries
------------------------------------------

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

    bat_grb_pos_cat.sh 304.476 5.265 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 304.476 5.265
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: 2021 8 22 9 238.973127  -16.807249
 Obj: 2021 8 22 9 90.247149  8.151727
  • the object visibility at GSFC, Greenbelt, Maryland 
     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2021 8 22 9 210.550517  -41.455047
 Obj: 2021 8 22 9 71.208884  36.553798
  • the object visibility at MMT, Mt. Hopkins, Arizona 
     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2021 8 22 9 202.624847  -42.224829
 Obj: 2021 8 22 9 65.258084  40.625428
  • the object visibility at Hale Telescope, Palomar Mt., California 
     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2021 8 22 9 144.037005  -51.984502
 Obj: 2021 8 22 9 19.884346  74.634240
  • the object visibility at Mauna Kea, Hawaii 
     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2021 8 22 9 93.560705  -16.952743
 Obj: 2021 8 22 9 241.842916  29.672008
  • the object visibility at Siding Spring Obs., Australia 
     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2021 8 22 9 97.590495  9.586483
 Obj: 2021 8 22 9 278.941259  21.985428
  • the object visibility at Tokyo, Japan 
     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2021 8 22 9 271.871437  28.144004
 Obj: 2021 8 22 9 127.539358  -40.595024
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain 
     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2021 8 22 9 273.406808  -29.264317
 Obj: 2021 8 22 9 94.770399  -2.446545
  • the object visibility at Gemini South, Cerro Pachon, Chile 
     
 
 
The data/results are in /local/data/bat1/prebascript/trigger1069788/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:
Sun Aug 22 05:36:23 EDT 2021