TDRSS lightcurve for Trigger=1185673

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 16 Aug 23 16:09:06 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1185673,   Seg_Num: 0
GRB_RA:          328.375d {+21h 53m 30s} (J2000),
                 328.624d {+21h 54m 30s} (current),
                 327.848d {+21h 51m 24s} (1950)
GRB_DEC:         +37.828d {+37d 49' 43"} (J2000),
                 +37.941d {+37d 56' 26"} (current),
                 +37.592d {+37d 35' 32"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       3455 [cnts]    Image_Peak=168 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   146     E_range: 25-100 keV
BKG_INTEN:       20578 [cnts]
BKG_TIME:        58112.16 SOD {16:08:32.16} UT
BKG_DUR:         8 [sec]
GRB_DATE:        20172 TJD;   228 DOY;   23/08/16
GRB_TIME:        58128.29 SOD {16:08:48.29} UT
GRB_PHI:         142.61 [deg]
GRB_THETA:        12.71 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     15.03 [sigma]
IMAGE_SIGNIF:    7.42 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +2  -2  +0  +0 +62  +0 
SUN_POSTN:       145.87d {+09h 43m 30s}  +13.67d {+13d 40' 06"}
SUN_DIST:        128.33 [deg]   Sun_angle= 11.8 [hr] (West of Sun)
MOON_POSTN:      150.35d {+10h 01m 25s}  +16.76d {+16d 45' 31"}
MOON_DIST:       125.28 [deg]
MOON_ILLUM:      0 [%]
GAL_COORDS:       88.35,-12.82 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      348.57, 46.67 [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 = 107.54,17.92 [deg].

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 16 Aug 23 16:27:33 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1185673,   Seg_Num: 0
GRB_RA:          328.375d {+21h 53m 30s} (J2000),
                 328.624d {+21h 54m 30s} (current),
                 327.848d {+21h 51m 24s} (1950)
GRB_DEC:         +37.828d {+37d 49' 43"} (J2000),
                 +37.941d {+37d 56' 26"} (current),
                 +37.592d {+37d 35' 32"} (1950)
GRB_DATE:        20172 TJD;   228 DOY;   23/08/16
GRB_TIME:        58128.29 SOD {16:08:48.29} UT
TRIGGER_INDEX:   146
GRB_PHI:         142.61 [deg]
GRB_THETA:        12.71 [deg]
DELTA_TIME:      -11.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     15.03 [sigma]
IMAGE_SIGNIF:    7.42 [sigma]
LC_URL:          sw01185673000msb.lc

GCN template for BAT paragraph

  • Click here! 
    At 16:08:48 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 230816 ***A*** (trigger=1185673).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 328.375, +37.828 which is 
   RA(J2000) = 21h 53m 30s
   Dec(J2000) = +37d 49' 43"
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 ~1910 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

    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: 14.784 s +/- 0.832 s
  Estimated T50 duration: 5.504 s +/- 0.286217 s
  Estimated Peak Interval: MET   713894960.63999987 +/- 0.500000 s
  Estimated background rate 1:     5063.951 near MET 713894944.960000 s
  Estimated background rate 2:     5173.019 near MET 713895074.240000 s
  Estimated total duration: 48.64 s (for data selection)
       (from MET 713894953.920000 to MET 713895002.560000)
  Estimated total fluence: 10179.702346 count
  Created GTI with 6 entries
------------------------------------------

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

    bat_grb_pos_cat.sh 328.375 37.828 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 328.375 37.828
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 8 16 16 322.178948  59.865137
 Obj: 2023 8 16 16 163.123595  -10.661795
  • the object visibility at GSFC, Greenbelt, Maryland 
     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2023 8 16 16 278.112414  38.871046
 Obj: 2023 8 16 16 139.544981  -3.473239
  • the object visibility at MMT, Mt. Hopkins, Arizona 
     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2023 8 16 16 275.663628  33.660792
 Obj: 2023 8 16 16 136.274180  1.144617
  • the object visibility at Hale Telescope, Palomar Mt., California 
     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2023 8 16 16 254.755785  -1.863066
 Obj: 2023 8 16 16 124.435470  19.527153
  • the object visibility at Mauna Kea, Hawaii 
     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2023 8 16 16 298.705927  -59.264991
 Obj: 2023 8 16 16 159.807378  16.991845
  • the object visibility at Siding Spring Obs., Australia 
     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2023 8 16 16 194.016717  -40.851891
 Obj: 2023 8 16 16 120.699541  82.548990
  • the object visibility at Tokyo, Japan 
     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2023 8 16 16 76.814700  49.536507
 Obj: 2023 8 16 16 209.946623  -14.551034
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain 
     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2023 8 16 16 197.190336  44.332541
 Obj: 2023 8 16 16 125.119372  -75.260024
  • the object visibility at Gemini South, Cerro Pachon, Chile 
     
 
 
The data/results are in /local/data/bat1/prebascript/trigger1185673/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 Aug 16 12:28:02 EDT 2023