TDRSS lightcurve for Trigger=1197507

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 20 Nov 23 00:26:06 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1197507,   Seg_Num: 0
GRB_RA:          299.870d {+19h 59m 29s} (J2000),
                 300.095d {+20h 00m 23s} (current),
                 299.399d {+19h 57m 36s} (1950)
GRB_DEC:         +35.064d {+35d 03' 50"} (J2000),
                 +35.130d {+35d 07' 50"} (current),
                 +34.926d {+34d 55' 35"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=4057 [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:        20268 TJD;   324 DOY;   23/11/20
GRB_TIME:        1479.59 SOD {00:24:39.59} UT
GRB_PHI:         173.08 [deg]
GRB_THETA:         0.05 [deg]
SOLN_STATUS:     0x3000051D
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    17.79 [sigma]
MERIT_PARAMS:     +0  +0 +100  +6  +1  +5  +0  +1 -13  +0 
SUN_POSTN:       235.13d {+15h 40m 32s}  -19.58d {-19d 34' 40"}
SUN_DIST:         82.34 [deg]   Sun_angle= -4.3 [hr] (East of Sun)
MOON_POSTN:      325.72d {+21h 42m 52s}  -18.64d {-18d 38' 14"}
MOON_DIST:        59.01 [deg]
MOON_ILLUM:      45 [%]
GAL_COORDS:       71.34,  2.80 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      313.96, 54.04 [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 matches a source in the on-board catalog: Num=27506=(null) (probably an AT_Slot).  
COMMENTS:        This matches a source in the ground catalog: Cyg X-1,   delta=0.267 [deg].  
COMMENTS:        This is not a GRB.  
COMMENTS:        This is an interesting source.  
COMMENTS:        This trigger occurred at longitude,latitude = 170.97,-0.96 [deg].  
COMMENTS:

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 20 Nov 23 00:43:44 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1197507,   Seg_Num: 0
GRB_RA:          299.870d {+19h 59m 29s} (J2000),
                 300.095d {+20h 00m 23s} (current),
                 299.399d {+19h 57m 36s} (1950)
GRB_DEC:         +35.064d {+35d 03' 50"} (J2000),
                 +35.130d {+35d 07' 50"} (current),
                 +34.926d {+34d 55' 35"} (1950)
GRB_DATE:        20268 TJD;   324 DOY;   23/11/20
GRB_TIME:        1479.59 SOD {00:24:39.59} UT
TRIGGER_INDEX:   20000
GRB_PHI:         173.08 [deg]
GRB_THETA:         0.05 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     64.000 [sec] 
SOLN_STATUS:     0x51D
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    17.79 [sigma]
LC_URL:          sw01197507000msb.lc

GCN template for BAT paragraph

  • Click here! 
    At 00:24:39 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 231120 ***A*** (trigger=1197507).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 299.870, +35.064 which is 
   RA(J2000) = 19h 59m 29s
   Dec(J2000) = +35d 03' 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 ~1031 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

    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

    Extended TDRSS lc No.5

    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:     3788.338 near MET 722132792.960000 s
  Estimated background rate 2:     3788.338 near MET 722132792.960000 s
  Estimated total fluence: 0.000000 count
  Created GTI with 1 entries
------------------------------------------

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

    bat_grb_pos_cat.sh 299.870 35.064 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 299.870 35.064
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: 2023 11 20 0 84.040231  -24.614945
 Obj: 2023 11 20 0 96.385860  57.093887
  • the object visibility at GSFC, Greenbelt, Maryland 
     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2023 11 20 0 64.087159  3.872921
 Obj: 2023 11 20 0 121.500224  83.010517
  • the object visibility at MMT, Mt. Hopkins, Arizona 
     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2023 11 20 0 60.482781  7.566171
 Obj: 2023 11 20 0 149.197234  87.921566
  • the object visibility at Hale Telescope, Palomar Mt., California 
     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2023 11 20 0 36.180604  42.124668
 Obj: 2023 11 20 0 237.105844  53.805259
  • the object visibility at Mauna Kea, Hawaii 
     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2023 11 20 0 251.564585  62.403638
 Obj: 2023 11 20 0 240.019375  -19.458934
  • the object visibility at Siding Spring Obs., Australia 
     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2023 11 20 0 314.896886  21.433858
 Obj: 2023 11 20 0 230.847639  5.770905
  • the object visibility at Tokyo, Japan 
     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2023 11 20 0 121.075884  -73.760337
 Obj: 2023 11 20 0 125.534516  8.521421
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain 
     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2023 11 20 0 61.751529  -7.937115
 Obj: 2023 11 20 0 142.342379  10.864350
  • the object visibility at Gemini South, Cerro Pachon, Chile 
     
 
 
The data/results are in /local/data/bat1/prebascript/trigger1197507/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 Nov 19 19:44:42 EST 2023