TDRSS lightcurve for Trigger=1182085

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 02 Aug 23 06:50:40 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1182085,   Seg_Num: 0
GRB_RA:           76.221d {+05h 04m 53s} (J2000),
                  76.568d {+05h 06m 16s} (current),
                  75.484d {+05h 01m 56s} (1950)
GRB_DEC:         +19.570d {+19d 34' 10"} (J2000),
                 +19.600d {+19d 36' 01"} (current),
                 +19.501d {+19d 30' 05"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       4133 [cnts]    Image_Peak=437 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   146     E_range: 25-100 keV
BKG_INTEN:       15639 [cnts]
BKG_TIME:        24608.24 SOD {06:50:08.24} UT
BKG_DUR:         8 [sec]
GRB_DATE:        20158 TJD;   214 DOY;   23/08/02
GRB_TIME:        24626.16 SOD {06:50:26.16} UT
GRB_PHI:         147.87 [deg]
GRB_THETA:        11.13 [deg]
SOLN_STATUS:     0x20000003
RATE_SIGNIF:     44.77 [sigma]
IMAGE_SIGNIF:    16.03 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +2  +4  +0  +0 -60  +0 
SUN_POSTN:       132.20d {+08h 48m 47s}  +17.80d {+17d 48' 16"}
SUN_DIST:         52.49 [deg]   Sun_angle= 3.7 [hr] (West of Sun)
MOON_POSTN:      320.94d {+21h 23m 45s}  -20.25d {-20d 15' 02"}
MOON_DIST:       119.90 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:      182.70,-12.90 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       77.01, -3.25 [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 = 1.96,18.14 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This BAT event is temporally(4.0<100sec) coincident with the FERMI_GBM event (trignum=712651827).

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 02 Aug 23 07:04:34 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1182085,   Seg_Num: 0
GRB_RA:           76.221d {+05h 04m 53s} (J2000),
                  76.568d {+05h 06m 16s} (current),
                  75.484d {+05h 01m 56s} (1950)
GRB_DEC:         +19.570d {+19d 34' 10"} (J2000),
                 +19.600d {+19d 36' 01"} (current),
                 +19.501d {+19d 30' 05"} (1950)
GRB_DATE:        20158 TJD;   214 DOY;   23/08/02
GRB_TIME:        24626.16 SOD {06:50:26.16} UT
TRIGGER_INDEX:   146
GRB_PHI:         147.87 [deg]
GRB_THETA:        11.13 [deg]
DELTA_TIME:      -31.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     44.77 [sigma]
IMAGE_SIGNIF:    16.03 [sigma]
LC_URL:          sw01182085000msb.lc

GCN template for BAT paragraph

  • Click here! 
    At 06:50:26 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 230802 ***A*** (trigger=1182085).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 76.221, +19.570 which is 
   RA(J2000) = 05h 04m 53s
   Dec(J2000) = +19d 34' 10"
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 ~3245 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: 139.648 s +/- 2.90513 s
  Estimated T50 duration: 15.104 s +/- 0.202386 s
  Estimated Peak Interval: MET   712651858.36800003 +/- 0.500000 s
  Estimated background rate 1:     3778.977 near MET 712651842.400000 s
  Estimated background rate 2:     3944.929 near MET 712652029.184000 s
  Estimated total duration: 163.648 s (for data selection)
       (from MET 712651851.200000 to MET 712652014.848000)
  Estimated total fluence: 55741.849800 count
  Created GTI with 15 entries
------------------------------------------

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

    bat_grb_pos_cat.sh 76.221 19.570 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 76.221 19.570
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 2 7 208.302639  -28.216449
 Obj: 2023 8 2 7 249.607222  5.999761
  • the object visibility at GSFC, Greenbelt, Maryland 
     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2023 8 2 7 170.096781  -39.947310
 Obj: 2023 8 2 7 228.388725  -21.351599
  • the object visibility at MMT, Mt. Hopkins, Arizona 
     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2023 8 2 7 163.271253  -37.163419
 Obj: 2023 8 2 7 223.212497  -23.808635
  • the object visibility at Hale Telescope, Palomar Mt., California 
     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2023 8 2 7 122.641999  -26.190951
 Obj: 2023 8 2 7 184.578626  -50.470610
  • the object visibility at Mauna Kea, Hawaii 
     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2023 8 2 7 114.585529  5.287586
 Obj: 2023 8 2 7 89.079174  -41.764266
  • the object visibility at Siding Spring Obs., Australia 
     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2023 8 2 7 86.103254  38.229628
 Obj: 2023 8 2 7 118.001217  -5.150002
  • the object visibility at Tokyo, Japan 
     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2023 8 2 7 252.024237  4.258857
 Obj: 2023 8 2 7 275.401810  53.134043
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain 
     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2023 8 2 7 285.970104  -58.428152
 Obj: 2023 8 2 7 254.026670  -11.795898
  • the object visibility at Gemini South, Cerro Pachon, Chile 
     
 
 
The data/results are in /local/data/bat1/prebascript/trigger1182085/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  2 03:05:04 EDT 2023