TDRSS lightcurve for Trigger=1071993

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 05 Sep 21 00:19:12 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1071993,   Seg_Num: 0
GRB_RA:          309.062d {+20h 36m 15s} (J2000),
                 309.431d {+20h 37m 43s} (current),
                 308.207d {+20h 32m 50s} (1950)
GRB_DEC:         -44.431d {-44d 25' 50"} (J2000),
                 -44.354d {-44d 21' 15"} (current),
                 -44.605d {-44d 36' 16"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       5412 [cnts]    Image_Peak=210 [image_cnts]
TRIGGER_DUR:     2.048 [sec] 
TRIGGER_INDEX:   263     E_range: 25-100 keV
BKG_INTEN:       52014 [cnts]
BKG_TIME:        724.32 SOD {00:12:04.32} UT
BKG_DUR:         24 [sec]
GRB_DATE:        19462 TJD;   248 DOY;   21/09/05
GRB_TIME:        761.32 SOD {00:12:41.32} UT
GRB_PHI:          54.49 [deg]
GRB_THETA:        32.96 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     14.17 [sigma]
IMAGE_SIGNIF:    9.35 [sigma]
MERIT_PARAMS:     +1  +0  +0  +1  +2  +0  +0  +0 +66  +0 
SUN_POSTN:       164.03d {+10h 56m 07s}   +6.80d {+06d 48' 03"}
SUN_DIST:        131.85 [deg]   Sun_angle= -9.7 [hr] (East of Sun)
MOON_POSTN:      141.30d {+09h 25m 13s}  +20.14d {+20d 08' 14"}
MOON_DIST:       153.85 [deg]
MOON_ILLUM:      5 [%]
GAL_COORDS:      356.14,-36.86 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      299.75,-24.94 [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 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 = 12.68,-9.77 [deg].

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 05 Sep 21 00:27:41 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1071993,   Seg_Num: 0
GRB_RA:          309.062d {+20h 36m 15s} (J2000),
                 309.431d {+20h 37m 43s} (current),
                 308.207d {+20h 32m 50s} (1950)
GRB_DEC:         -44.431d {-44d 25' 50"} (J2000),
                 -44.354d {-44d 21' 15"} (current),
                 -44.605d {-44d 36' 16"} (1950)
GRB_DATE:        19462 TJD;   248 DOY;   21/09/05
GRB_TIME:        761.32 SOD {00:12:41.32} UT
TRIGGER_INDEX:   263
GRB_PHI:          54.49 [deg]
GRB_THETA:        32.96 [deg]
DELTA_TIME:      -18.00 [sec]
TRIGGER_DUR:     2.048 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     14.17 [sigma]
IMAGE_SIGNIF:    9.35 [sigma]
LC_URL:          sw01071993000msb.lc

GCN template for BAT paragraph

  • Click here! 
    At 00:12:41 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 210905 ***A*** (trigger=1071993).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 309.062, -44.431 which is 
   RA(J2000) = 20h 36m 15s
   Dec(J2000) = -44d 25' 50"
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 ~1476 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

    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: 157.76 s +/- 81.3095 s
  Estimated T50 duration: 157.76 s +/- 101.522 s
  Estimated Peak Interval: MET   652493588.92799997 +/- 0.500000 s
  Estimated background rate 1:     4482.232 near MET 652493570.400000 s
  Estimated background rate 2:     4018.286 near MET 652493754.240000 s
  Estimated total duration: 157.76 s (for data selection)
       (from MET 652493576.000000 to MET 652493733.760000)
  Estimated total fluence: -8481.392314 count
  Created GTI with 8 entries
------------------------------------------

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

    bat_grb_pos_cat.sh 309.062 -44.431 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 309.062 -44.431
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 5 0 103.471850  -5.659143
 Obj: 2021 9 5 0 331.109358  -1.767797
  • the object visibility at GSFC, Greenbelt, Maryland 
     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2021 9 5 0 84.652165  21.442146
 Obj: 2021 9 5 0 314.477844  -13.039180
  • the object visibility at MMT, Mt. Hopkins, Arizona 
     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2021 9 5 0 80.411727  26.229774
 Obj: 2021 9 5 0 311.876165  -17.857193
  • the object visibility at Hale Telescope, Palomar Mt., California 
     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2021 9 5 0 64.464068  63.012679
 Obj: 2021 9 5 0 311.000546  -35.784184
  • the object visibility at Mauna Kea, Hawaii 
     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2021 9 5 0 223.406215  41.642991
 Obj: 2021 9 5 0 357.443373  -14.328351
  • the object visibility at Siding Spring Obs., Australia 
     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2021 9 5 0 290.820985  38.131848
 Obj: 2021 9 5 0 41.572165  -75.817610
  • the object visibility at Tokyo, Japan 
     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2021 9 5 0 151.091601  -50.426475
 Obj: 2021 9 5 0 12.168508  15.314704
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain 
     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2021 9 5 0 86.375883  -19.689149
 Obj: 2021 9 5 0 306.329761  58.044058
  • the object visibility at Gemini South, Cerro Pachon, Chile 
     
 
 
The data/results are in /local/data/bat1/prebascript/trigger1071993/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:
Sat Sep  4 20:28:27 EDT 2021