TDRSS lightcurve for Trigger=1121751

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 26 Aug 22 11:55:34 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1121751,   Seg_Num: 0
GRB_RA:          206.431d {+13h 45m 44s} (J2000),
                 206.776d {+13h 47m 06s} (current),
                 205.673d {+13h 42m 42s} (1950)
GRB_DEC:         -44.044d {-44d 02' 39"} (J2000),
                 -44.157d {-44d 09' 25"} (current),
                 -43.794d {-43d 47' 39"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       1888 [cnts]    Image_Peak=125 [image_cnts]
TRIGGER_DUR:     0.512 [sec] 
TRIGGER_INDEX:   124     E_range: 25-100 keV
BKG_INTEN:       19983 [cnts]
BKG_TIME:        42906.25 SOD {11:55:06.25} UT
BKG_DUR:         8 [sec]
GRB_DATE:        19817 TJD;   238 DOY;   22/08/26
GRB_TIME:        42921.74 SOD {11:55:21.74} UT
GRB_PHI:          -0.60 [deg]
GRB_THETA:        23.69 [deg]
SOLN_STATUS:     0x20000003
RATE_SIGNIF:     16.49 [sigma]
IMAGE_SIGNIF:    7.45 [sigma]
MERIT_PARAMS:     +1  +0  +0  -1  +2  -2  +0  +0 -31  +0 
SUN_POSTN:       155.17d {+10h 20m 41s}  +10.32d {+10d 18' 56"}
SUN_DIST:         71.72 [deg]   Sun_angle= -3.4 [hr] (East of Sun)
MOON_POSTN:      147.76d {+09h 51m 03s}  +18.30d {+18d 17' 48"}
MOON_DIST:        82.41 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:      313.13, 17.75 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      221.53,-30.70 [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 = 54.92,10.77 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This BAT event is temporally(1.0<100sec) coincident with the FERMI_GBM event (trignum=683207727).

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 26 Aug 22 12:17:16 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1121751,   Seg_Num: 0
GRB_RA:          206.431d {+13h 45m 44s} (J2000),
                 206.776d {+13h 47m 06s} (current),
                 205.673d {+13h 42m 42s} (1950)
GRB_DEC:         -44.044d {-44d 02' 39"} (J2000),
                 -44.157d {-44d 09' 25"} (current),
                 -43.794d {-43d 47' 39"} (1950)
GRB_DATE:        19817 TJD;   238 DOY;   22/08/26
GRB_TIME:        42921.74 SOD {11:55:21.74} UT
TRIGGER_INDEX:   124
GRB_PHI:          -0.60 [deg]
GRB_THETA:        23.69 [deg]
DELTA_TIME:      52.00 [sec]
TRIGGER_DUR:     0.512 [sec] 
SOLN_STATUS:     0x2003
RATE_SIGNIF:     16.49 [sigma]
IMAGE_SIGNIF:    7.45 [sigma]
LC_URL:          sw01121751000msb.lc

GCN template for BAT paragraph

  • Click here! 
    At 11:55:21 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 220826 ***A*** (trigger=1121751).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 206.431, -44.044 which is 
   RA(J2000) = 13h 45m 44s
   Dec(J2000) = -44d 02' 39"
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 ~3613 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: 79.616 s +/- 2.89772 s
  Estimated T50 duration: 24.064 s +/- 1.09363 s
  Estimated Peak Interval: MET   683207758.65599990 +/- 0.500000 s
  Estimated background rate 1:     5333.218 near MET 683207739.584000 s
  Estimated background rate 2:     5360.307 near MET 683207892.864000 s
  Estimated total duration: 96.64 s (for data selection)
       (from MET 683207751.168000 to MET 683207847.808000)
  Estimated total fluence: 23598.001409 count
  Created GTI with 10 entries
------------------------------------------

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

    bat_grb_pos_cat.sh 206.431 -44.044 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 206.431 -44.044
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: 2022 8 26 12 269.481440  15.854981
 Obj: 2022 8 26 12 294.673366  -52.446198
  • the object visibility at GSFC, Greenbelt, Maryland 
     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2022 8 26 12 249.326102  -12.588348
 Obj: 2022 8 26 12 318.541438  -72.011697
  • the object visibility at MMT, Mt. Hopkins, Arizona 
     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2022 8 26 12 245.201260  -16.598294
 Obj: 2022 8 26 12 325.831314  -76.436849
  • the object visibility at Hale Telescope, Palomar Mt., California 
     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2022 8 26 12 219.677763  -51.968235
 Obj: 2022 8 26 12 37.423273  -56.342964
  • the object visibility at Mauna Kea, Hawaii 
     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2022 8 26 12 61.619160  -53.814615
 Obj: 2022 8 26 12 48.186337  16.952459
  • the object visibility at Siding Spring Obs., Australia 
     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2022 8 26 12 125.004689  -25.923634
 Obj: 2022 8 26 12 47.560989  -16.881799
  • the object visibility at Tokyo, Japan 
     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2022 8 26 12 312.483390  64.469973
 Obj: 2022 8 26 12 317.055294  -7.184028
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain 
     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2022 8 26 12 251.738864  9.916644
 Obj: 2022 8 26 12 323.267988  0.525220
  • the object visibility at Gemini South, Cerro Pachon, Chile 
     
 
 
The data/results are in /local/data/bat1/prebascript/trigger1121751/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:
Fri Aug 26 08:17:42 EDT 2022