TDRSS lightcurve for Trigger=1059494

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 08 Jul 21 13:35:00 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1059494,   Seg_Num: 0
GRB_RA:          142.579d {+09h 30m 19s} (J2000),
                 142.873d {+09h 31m 30s} (current),
                 141.894d {+09h 27m 35s} (1950)
GRB_DEC:         +14.471d {+14d 28' 16"} (J2000),
                 +14.376d {+14d 22' 33"} (current),
                 +14.691d {+14d 41' 29"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=1813 [image_cnts]
TRIGGER_DUR:     64.000 [sec] 
TRIGGER_INDEX:   20000     E_range: 15-50 keV
BKG_INTEN:       0 [cnts]
BKG_TIME:        0.00 SOD {00:00:00.00} UT
BKG_DUR:         0 [sec]
GRB_DATE:        19403 TJD;   189 DOY;   21/07/08
GRB_TIME:        48204.66 SOD {13:23:24.66} UT
GRB_PHI:         -72.95 [deg]
GRB_THETA:        19.85 [deg]
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    10.51 [sigma]
MERIT_PARAMS:     +1  +0  +0  +6  +1  +0 -100  +0 -83  +0 
SUN_POSTN:       108.02d {+07h 12m 04s}  +22.40d {+22d 24' 10"}
SUN_DIST:         33.95 [deg]   Sun_angle= -2.3 [hr] (East of Sun)
MOON_POSTN:       89.94d {+05h 59m 45s}  +25.08d {+25d 04' 47"}
MOON_DIST:        50.65 [deg]
MOON_ILLUM:      2 [%]
GAL_COORDS:      217.52, 41.65 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      140.26, -0.27 [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 an image trigger.  (The RATE_SIGNIF & BKG_{INTEN, TIME, DUR} are undefined.)  
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 = 14.64,-17.83 [deg].

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 08 Jul 21 13:40:52 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1059494,   Seg_Num: 0
GRB_RA:          142.579d {+09h 30m 19s} (J2000),
                 142.873d {+09h 31m 30s} (current),
                 141.894d {+09h 27m 35s} (1950)
GRB_DEC:         +14.471d {+14d 28' 16"} (J2000),
                 +14.376d {+14d 22' 33"} (current),
                 +14.691d {+14d 41' 29"} (1950)
GRB_DATE:        19403 TJD;   189 DOY;   21/07/08
GRB_TIME:        48204.66 SOD {13:23:24.66} UT
TRIGGER_INDEX:   20000
GRB_PHI:         -72.95 [deg]
GRB_THETA:        19.85 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     64.000 [sec] 
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    10.51 [sigma]
LC_URL:          sw01059494000msb.lc

GCN template for BAT paragraph

  • Click here! 
    At 13:23:24 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 210708 ***A*** (trigger=1059494).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 142.579, +14.471 which is 
   RA(J2000) = 09h 30m 19s
   Dec(J2000) = +14d 28' 16"
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 ~1459 counts/sec (15-350 keV), at ~6 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

    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: 116.224 s +/- 16.7563 s
  Estimated T50 duration: 116.224 s +/- 55.4866 s
  Estimated Peak Interval: MET   647443452.41600001 +/- 0.500000 s
  Estimated background rate 1:     5384.271 near MET 647443428.224000 s
  Estimated background rate 2:     4843.468 near MET 647443591.296000 s
  Estimated total duration: 116.224 s (for data selection)
       (from MET 647443448.448000 to MET 647443564.672000)
  Estimated total fluence: -12362.480244 count
  Created GTI with 5 entries
------------------------------------------

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

    bat_grb_pos_cat.sh 142.579 14.471 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 142.579 14.471
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 7 8 13 267.356033  33.928747
 Obj: 2021 7 8 13 253.512125  2.508213
  • the object visibility at GSFC, Greenbelt, Maryland 
     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2021 7 8 13 246.979584  5.430687
 Obj: 2021 7 8 13 232.112774  -25.307410
  • the object visibility at MMT, Mt. Hopkins, Arizona 
     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2021 7 8 13 243.982481  1.530376
 Obj: 2021 7 8 13 226.609255  -28.052303
  • the object visibility at Hale Telescope, Palomar Mt., California 
     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2021 7 8 13 223.006651  -33.965204
 Obj: 2021 7 8 13 184.935821  -55.693081
  • the object visibility at Mauna Kea, Hawaii 
     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2021 7 8 13 64.960520  -71.917048
 Obj: 2021 7 8 13 83.079451  -39.210348
  • the object visibility at Siding Spring Obs., Australia 
     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2021 7 8 13 145.042509  -24.513725
 Obj: 2021 7 8 13 113.782445  -8.279501
  • the object visibility at Tokyo, Japan 
     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2021 7 8 13 325.349731  82.385932
 Obj: 2021 7 8 13 282.934930  50.718868
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain 
     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2021 7 8 13 233.526971  13.433671
 Obj: 2021 7 8 13 258.794348  -9.474544
  • the object visibility at Gemini South, Cerro Pachon, Chile 
     
 
 
The data/results are in /local/data/bat1/prebascript/trigger1059494/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 Jul  8 09:43:04 EDT 2021