TDRSS lightcurve for Trigger=1072706

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 10 Sep 21 10:12:06 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1072706,   Seg_Num: 0
GRB_RA:          238.773d {+15h 55m 05s} (J2000),
                 239.194d {+15h 56m 46s} (current),
                 237.807d {+15h 51m 14s} (1950)
GRB_DEC:         -54.055d {-54d 03' 16"} (J2000),
                 -54.117d {-54d 07' 00"} (current),
                 -53.908d {-53d 54' 29"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       119 [cnts]    Image_Peak=33 [image_cnts]
TRIGGER_DUR:     0.004 [sec] 
TRIGGER_INDEX:   10009     E_range: 15-50 keV
BKG_INTEN:       23756 [cnts]
BKG_TIME:        36700.29 SOD {10:11:40.29} UT
BKG_DUR:         8 [sec]
GRB_DATE:        19467 TJD;   253 DOY;   21/09/10
GRB_TIME:        36715.65 SOD {10:11:55.65} UT
GRB_PHI:         -143.61 [deg]
GRB_THETA:        33.57 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     29.83 [sigma]
IMAGE_SIGNIF:    8.71 [sigma]
MERIT_PARAMS:     +1  +0  +0  -8  +1  -1  +0  +1 -13  +0 
SUN_POSTN:       168.90d {+11h 15m 36s}   +4.77d {+04d 46' 13"}
SUN_DIST:         82.56 [deg]   Sun_angle= -4.7 [hr] (East of Sun)
MOON_POSTN:      211.19d {+14h 04m 47s}   -9.69d {-09d 41' 20"}
MOON_DIST:        49.72 [deg]
MOON_ILLUM:      14 [%]
GAL_COORDS:      327.87, -0.33 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      248.75,-32.90 [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 = 102.21,15.76 [deg].

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 10 Sep 21 10:32:30 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1072706,   Seg_Num: 0
GRB_RA:          238.773d {+15h 55m 05s} (J2000),
                 239.194d {+15h 56m 46s} (current),
                 237.807d {+15h 51m 14s} (1950)
GRB_DEC:         -54.055d {-54d 03' 16"} (J2000),
                 -54.117d {-54d 07' 00"} (current),
                 -53.908d {-53d 54' 29"} (1950)
GRB_DATE:        19467 TJD;   253 DOY;   21/09/10
GRB_TIME:        36715.90 SOD {10:11:55.90} UT
TRIGGER_INDEX:   10009
GRB_PHI:         -143.61 [deg]
GRB_THETA:        33.57 [deg]
DELTA_TIME:      39.00 [sec]
TRIGGER_DUR:     0.004 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     29.83 [sigma]
IMAGE_SIGNIF:    8.71 [sigma]
LC_URL:          sw01072706000msb.lc

GCN template for BAT paragraph

  • Click here! 
    At 10:11:55 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 210910 ***A*** (trigger=1072706).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 238.773, -54.055 which is 
   RA(J2000) = 15h 55m 05s
   Dec(J2000) = -54d 03' 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 ~1296 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

    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 background rate 1:     4963.867 near MET 652961555.328000 s
  Estimated background rate 2:     4759.708 near MET 652961660.288000 s
  Estimated total fluence: 0.000000 count
  Created GTI with 2 entries
------------------------------------------

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

    bat_grb_pos_cat.sh 238.773 -54.055 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 238.773 -54.055
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 9 10 10 255.668783  -9.767700
 Obj: 2021 9 10 10 353.100140  -74.750612
  • the object visibility at GSFC, Greenbelt, Maryland 
     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2021 9 10 10 233.067356  -37.739839
 Obj: 2021 9 10 10 35.295404  -58.614988
  • the object visibility at MMT, Mt. Hopkins, Arizona 
     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2021 9 10 10 226.158715  -40.505279
 Obj: 2021 9 10 10 40.018607  -56.846723
  • the object visibility at Hale Telescope, Palomar Mt., California 
     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2021 9 10 10 167.732434  -64.882659
 Obj: 2021 9 10 10 38.540871  -24.430026
  • the object visibility at Mauna Kea, Hawaii 
     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2021 9 10 10 78.138714  -27.449547
 Obj: 2021 9 10 10 41.926406  48.487997
  • the object visibility at Siding Spring Obs., Australia 
     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2021 9 10 10 101.209111  -7.739655
 Obj: 2021 9 10 10 18.340925  -2.878196
  • the object visibility at Tokyo, Japan 
     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2021 9 10 10 288.775492  38.947860
 Obj: 2021 9 10 10 318.153023  -39.097179
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain 
     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2021 9 10 10 271.272250  -11.683463
 Obj: 2021 9 10 10 354.721992  -5.225105
  • the object visibility at Gemini South, Cerro Pachon, Chile 
     
 
 
The data/results are in /local/data/bat1/prebascript/trigger1072706/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:
Fri Sep 10 06:33:25 EDT 2021