TDRSS lightcurve for Trigger=1075565

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 30 Sep 21 02:48:06 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1075565,   Seg_Num: 0
GRB_RA:          197.435d {+13h 09m 44s} (J2000),
                 197.673d {+13h 10m 41s} (current),
                 196.888d {+13h 07m 33s} (1950)
GRB_DEC:         +48.623d {+48d 37' 22"} (J2000),
                 +48.507d {+48d 30' 27"} (current),
                 +48.889d {+48d 53' 20"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=1197 [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:        19487 TJD;   273 DOY;   21/09/30
GRB_TIME:        10012.18 SOD {02:46:52.18} UT
GRB_PHI:         -159.38 [deg]
GRB_THETA:        19.03 [deg]
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    7.50 [sigma]
MERIT_PARAMS:     +1  +0  +0  +6  +1  -2  +0  +0 -61  +0 
SUN_POSTN:       186.59d {+12h 26m 21s}   -2.85d {-02d 50' 46"}
SUN_DIST:         52.25 [deg]   Sun_angle= -0.7 [hr] (East of Sun)
MOON_POSTN:      110.64d {+07h 22m 33s}  +25.79d {+25d 47' 22"}
MOON_DIST:        69.10 [deg]
MOON_ILLUM:      40 [%]
GAL_COORDS:      114.76, 68.21 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      169.51, 50.11 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
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 = 82.97,7.91 [deg].

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 30 Sep 21 03:07:28 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1075565,   Seg_Num: 0
GRB_RA:          197.435d {+13h 09m 44s} (J2000),
                 197.673d {+13h 10m 41s} (current),
                 196.888d {+13h 07m 33s} (1950)
GRB_DEC:         +48.623d {+48d 37' 22"} (J2000),
                 +48.507d {+48d 30' 27"} (current),
                 +48.889d {+48d 53' 20"} (1950)
GRB_DATE:        19487 TJD;   273 DOY;   21/09/30
GRB_TIME:        10012.18 SOD {02:46:52.18} UT
TRIGGER_INDEX:   20000
GRB_PHI:         -159.38 [deg]
GRB_THETA:        19.03 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     64.000 [sec] 
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    7.50 [sigma]
LC_URL:          sw01075565000msb.lc

GCN template for BAT paragraph

  • Click here! 
    At 02:46:52 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 210930 ***A*** (trigger=1075565).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 197.435, +48.623 which is 
   RA(J2000) = 13h 09m 44s
   Dec(J2000) = +48d 37' 22"
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 ~1265 counts/sec (15-350 keV), at ~7 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: 14.08 s +/- 0.724077 s
  Estimated T50 duration: 4.608 s +/- 0.256 s
  Estimated Peak Interval: MET   654662848.31999993 +/- 0.500000 s
  Estimated background rate 1:     3971.388 near MET 654662830.976000 s
  Estimated background rate 2:     3965.680 near MET 654662944.000000 s
  Estimated total duration: 16.128 s (for data selection)
       (from MET 654662845.952000 to MET 654662862.080000)
  Estimated total fluence: 5004.160581 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 197.435 48.623 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 197.435 48.623
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 30 3 135.493507  -44.795942
 Obj: 2021 9 30 3 154.163747  4.703208
  • the object visibility at GSFC, Greenbelt, Maryland 
     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2021 9 30 3 101.873428  -23.625972
 Obj: 2021 9 30 3 138.676043  14.274346
  • the object visibility at MMT, Mt. Hopkins, Arizona 
     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2021 9 30 3 98.932982  -18.364597
 Obj: 2021 9 30 3 136.231344  18.913953
  • the object visibility at Hale Telescope, Palomar Mt., California 
     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2021 9 30 3 80.755222  16.269525
 Obj: 2021 9 30 3 135.850718  34.127201
  • the object visibility at Mauna Kea, Hawaii 
     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2021 9 30 3 148.774521  57.765046
 Obj: 2021 9 30 3 176.645021  10.045328
  • the object visibility at Siding Spring Obs., Australia 
     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2021 9 30 3 359.087978  52.717665
 Obj: 2021 9 30 3 207.977371  73.452475
  • the object visibility at Tokyo, Japan 
     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2021 9 30 3 232.262270  -52.108284
 Obj: 2021 9 30 3 192.066669  -11.103556
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain 
     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2021 9 30 3 38.862517  -49.701892
 Obj: 2021 9 30 3 134.391206  -57.838441
  • the object visibility at Gemini South, Cerro Pachon, Chile 
     
 
 
The data/results are in /local/data/bat1/prebascript/trigger1075565/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:
Wed Sep 29 23:08:24 EDT 2021