TDRSS lightcurve for Trigger=1031297

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 07 Feb 21 21:52:20 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1031297,   Seg_Num: 0
GRB_RA:          270.582d {+18h 02m 20s} (J2000),
                 270.693d {+18h 02m 46s} (current),
                 270.321d {+18h 01m 17s} (1950)
GRB_DEC:         +53.694d {+53d 41' 39"} (J2000),
                 +53.695d {+53d 41' 43"} (current),
                 +53.692d {+53d 41' 31"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       1889 [cnts]    Image_Peak=143 [image_cnts]
TRIGGER_DUR:     0.512 [sec] 
TRIGGER_INDEX:   124     E_range: 25-100 keV
BKG_INTEN:       19427 [cnts]
BKG_TIME:        78717.53 SOD {21:51:57.53} UT
BKG_DUR:         8 [sec]
GRB_DATE:        19252 TJD;    38 DOY;   21/02/07
GRB_TIME:        78728.15 SOD {21:52:08.15} UT
GRB_PHI:          17.13 [deg]
GRB_THETA:        32.95 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     17.74 [sigma]
IMAGE_SIGNIF:    9.59 [sigma]
MERIT_PARAMS:     +1  +0  +0  -1  +2  +0  +0  +0 -14  +0 
SUN_POSTN:       321.77d {+21h 27m 05s}  -15.02d {-15d 00' 56"}
SUN_DIST:         81.35 [deg]   Sun_angle= 3.4 [hr] (West of Sun)
MOON_POSTN:      270.65d {+18h 02m 36s}  -24.61d {-24d 36' 53"}
MOON_DIST:        78.31 [deg]
MOON_ILLUM:      17 [%]
GAL_COORDS:       81.69, 28.65 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      271.55, 77.13 [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 = 221.37,10.01 [deg].

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 07 Feb 21 22:11:05 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1031297,   Seg_Num: 0
GRB_RA:          270.582d {+18h 02m 20s} (J2000),
                 270.693d {+18h 02m 46s} (current),
                 270.321d {+18h 01m 17s} (1950)
GRB_DEC:         +53.694d {+53d 41' 39"} (J2000),
                 +53.695d {+53d 41' 43"} (current),
                 +53.692d {+53d 41' 31"} (1950)
GRB_DATE:        19252 TJD;    38 DOY;   21/02/07
GRB_TIME:        78728.15 SOD {21:52:08.15} UT
TRIGGER_INDEX:   124
GRB_PHI:          17.13 [deg]
GRB_THETA:        32.95 [deg]
DELTA_TIME:      58.00 [sec]
TRIGGER_DUR:     0.512 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     17.74 [sigma]
IMAGE_SIGNIF:    9.59 [sigma]
LC_URL:          sw01031297000msb.lc

GCN template for BAT paragraph

  • Click here! 
    At 21:52:08 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 210207 ***A*** (trigger=1031297).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 270.582, +53.694 which is 
   RA(J2000) = 18h 02m 20s
   Dec(J2000) = +53d 41' 39"
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 ~3175 counts/sec (15-350 keV), at ~45 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: 93.568 s +/- 2.89772 s
  Estimated T50 duration: 20.48 s +/- 2.98545 s
  Estimated Peak Interval: MET   634427599.80799997 +/- 0.500000 s
  Estimated background rate 1:     4888.294 near MET 634427542.784000 s
  Estimated background rate 2:     4868.433 near MET 634427700.160000 s
  Estimated total duration: 104.832 s (for data selection)
       (from MET 634427554.368000 to MET 634427659.200000)
  Estimated total fluence: 65716.865168 count
  Created GTI with 20 entries
------------------------------------------

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

    bat_grb_pos_cat.sh 270.582 53.694 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 270.582 53.694
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 2 7 22 65.119923  5.985337
 Obj: 2021 2 7 22 147.822774  15.983015
  • the object visibility at GSFC, Greenbelt, Maryland 
     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2021 2 7 22 41.130068  32.412283
 Obj: 2021 2 7 22 138.383034  27.157213
  • the object visibility at MMT, Mt. Hopkins, Arizona 
     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2021 2 7 22 34.616536  34.197530
 Obj: 2021 2 7 22 136.633863  31.795229
  • the object visibility at Hale Telescope, Palomar Mt., California 
     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2021 2 7 22 344.293082  53.894333
 Obj: 2021 2 7 22 147.113106  43.604537
  • the object visibility at Mauna Kea, Hawaii 
     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2021 2 7 22 270.603257  28.901953
 Obj: 2021 2 7 22 188.186090  4.133002
  • the object visibility at Siding Spring Obs., Australia 
     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2021 2 7 22 287.084550  -1.743590
 Obj: 2021 2 7 22 218.578772  61.178463
  • the object visibility at Tokyo, Japan 
     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2021 2 7 22 94.466583  -40.336758
 Obj: 2021 2 7 22 179.505575  -7.584920
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain 
     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2021 2 7 22 84.049745  20.262834
 Obj: 2021 2 7 22 137.346402  -45.091107
  • the object visibility at Gemini South, Cerro Pachon, Chile 
     
 
 
The data/results are in /local/data/bat1/prebascript/trigger1031297/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 Feb  7 17:11:23 EST 2021