TDRSS lightcurve for Trigger=1031728

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 10 Feb 21 02:00:39 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1031728,   Seg_Num: 0
GRB_RA:          262.811d {+17h 31m 15s} (J2000),
                 263.051d {+17h 32m 12s} (current),
                 262.243d {+17h 28m 58s} (1950)
GRB_DEC:         +14.648d {+14d 38' 53"} (J2000),
                 +14.634d {+14d 38' 01"} (current),
                 +14.684d {+14d 41' 04"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       698 [cnts]    Image_Peak=65 [image_cnts]
TRIGGER_DUR:     0.128 [sec] 
TRIGGER_INDEX:   122     E_range: 25-100 keV
BKG_INTEN:       23672 [cnts]
BKG_TIME:        7213.51 SOD {02:00:13.51} UT
BKG_DUR:         8 [sec]
GRB_DATE:        19255 TJD;    41 DOY;   21/02/10
GRB_TIME:        7227.91 SOD {02:00:27.91} UT
GRB_PHI:         154.01 [deg]
GRB_THETA:        35.45 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     16.24 [sigma]
IMAGE_SIGNIF:    7.51 [sigma]
MERIT_PARAMS:     +1  +0  +0  -3  +2  -2  +0  +0 -38  +0 
SUN_POSTN:       323.93d {+21h 35m 43s}  -14.32d {-14d 19' 05"}
SUN_DIST:         66.81 [deg]   Sun_angle= 4.1 [hr] (West of Sun)
MOON_POSTN:      303.40d {+20h 13m 36s}  -23.48d {-23d 28' 57"}
MOON_DIST:        54.85 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:       37.58, 24.24 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      261.18, 37.87 [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 = 54.99,18.77 [deg].

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 10 Feb 21 02:19:07 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1031728,   Seg_Num: 0
GRB_RA:          262.811d {+17h 31m 15s} (J2000),
                 263.051d {+17h 32m 12s} (current),
                 262.243d {+17h 28m 58s} (1950)
GRB_DEC:         +14.648d {+14d 38' 53"} (J2000),
                 +14.634d {+14d 38' 01"} (current),
                 +14.684d {+14d 41' 04"} (1950)
GRB_DATE:        19255 TJD;    41 DOY;   21/02/10
GRB_TIME:        7227.91 SOD {02:00:27.91} UT
TRIGGER_INDEX:   122
GRB_PHI:         154.01 [deg]
GRB_THETA:        35.45 [deg]
DELTA_TIME:      2270.00 [sec]
TRIGGER_DUR:     0.128 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     16.24 [sigma]
IMAGE_SIGNIF:    7.51 [sigma]
LC_URL:          sw01031728000msb.lc

GCN template for BAT paragraph

  • Click here! 
    At 02:00:27 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 210210 ***A*** (trigger=1031728).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 262.811, +14.648 which is 
   RA(J2000) = 17h 31m 15s
   Dec(J2000) = +14d 38' 53"
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 ~5765 counts/sec (15-350 keV), at ~4 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: 6.016 s +/- 0.286217 s
  Estimated T50 duration: 4.608 s +/- 0.128 s
  Estimated Peak Interval: MET   634615259.13599992 +/- 0.500000 s
  Estimated background rate 1:     6292.883 near MET 634615242.048000 s
  Estimated background rate 2:     6702.009 near MET 634615261.504000 s
  Estimated total duration: 6.912 s (for data selection)
       (from MET 634615253.696000 to MET 634615260.608000)
  Estimated total fluence: 6624.649611 count
  Created GTI with 9 entries
------------------------------------------

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

    bat_grb_pos_cat.sh 262.811 14.648 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 262.811 14.648
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 10 2 104.322897  -39.094315
 Obj: 2021 2 10 2 191.858817  -35.592398
  • the object visibility at GSFC, Greenbelt, Maryland 
     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2021 2 10 2 80.266556  -11.733294
 Obj: 2021 2 10 2 149.857428  -38.283010
  • the object visibility at MMT, Mt. Hopkins, Arizona 
     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2021 2 10 2 77.478667  -7.104358
 Obj: 2021 2 10 2 144.203597  -34.140266
  • the object visibility at Hale Telescope, Palomar Mt., California 
     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2021 2 10 2 59.408458  29.705080
 Obj: 2021 2 10 2 111.627587  -14.268372
  • the object visibility at Mauna Kea, Hawaii 
     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2021 2 10 2 196.192175  72.420420
 Obj: 2021 2 10 2 121.843756  19.379028
  • the object visibility at Siding Spring Obs., Australia 
     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2021 2 10 2 333.426194  37.094031
 Obj: 2021 2 10 2 70.685457  49.499343
  • the object visibility at Tokyo, Japan 
     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2021 2 10 2 209.066885  -73.759237
 Obj: 2021 2 10 2 246.711897  -10.590147
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain 
     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2021 2 10 2 50.788472  -27.809237
 Obj: 2021 2 10 2 313.648703  -68.593977
  • the object visibility at Gemini South, Cerro Pachon, Chile 
     
 
 
The data/results are in /local/data/bat1/prebascript/trigger1031728/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:
Tue Feb  9 21:19:25 EST 2021