TDRSS lightcurve for Trigger=1102281

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 12 Apr 22 06:37:44 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1102281,   Seg_Num: 0
GRB_RA:          123.968d {+08h 15m 52s} (J2000),
                 124.313d {+08h 17m 15s} (current),
                 123.191d {+08h 12m 46s} (1950)
GRB_DEC:         +30.322d {+30d 19' 19"} (J2000),
                 +30.252d {+30d 15' 09"} (current),
                 +30.476d {+30d 28' 34"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       21154 [cnts]    Image_Peak=407 [image_cnts]
TRIGGER_DUR:     8.192 [sec] 
TRIGGER_INDEX:   477     E_range: 25-100 keV
BKG_INTEN:       151024 [cnts]
BKG_TIME:        23723.05 SOD {06:35:23.05} UT
BKG_DUR:         64 [sec]
GRB_DATE:        19681 TJD;   102 DOY;   22/04/12
GRB_TIME:        23810.22 SOD {06:36:50.22} UT
GRB_PHI:          29.70 [deg]
GRB_THETA:        16.35 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     10.04 [sigma]
IMAGE_SIGNIF:    7.20 [sigma]
MERIT_PARAMS:     +1  +0  +0  +3  +2  -3  +0  +0 +12  +0 
SUN_POSTN:        20.67d {+01h 22m 40s}   +8.70d {+08d 41' 52"}
SUN_DIST:         97.20 [deg]   Sun_angle= -6.9 [hr] (East of Sun)
MOON_POSTN:      150.07d {+10h 00m 16s}  +17.74d {+17d 44' 34"}
MOON_DIST:        26.55 [deg]
MOON_ILLUM:      78 [%]
GAL_COORDS:      192.03, 30.46 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      119.35, 10.28 [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 = 205.79,20.64 [deg].

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 12 Apr 22 06:58:26 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1102281,   Seg_Num: 0
GRB_RA:          123.968d {+08h 15m 52s} (J2000),
                 124.313d {+08h 17m 15s} (current),
                 123.191d {+08h 12m 46s} (1950)
GRB_DEC:         +30.322d {+30d 19' 19"} (J2000),
                 +30.252d {+30d 15' 09"} (current),
                 +30.476d {+30d 28' 34"} (1950)
GRB_DATE:        19681 TJD;   102 DOY;   22/04/12
GRB_TIME:        23810.22 SOD {06:36:50.22} UT
TRIGGER_INDEX:   477
GRB_PHI:          29.70 [deg]
GRB_THETA:        16.35 [deg]
DELTA_TIME:      -76.00 [sec]
TRIGGER_DUR:     8.192 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     10.04 [sigma]
IMAGE_SIGNIF:    7.20 [sigma]
LC_URL:          sw01102281000msb.lc

GCN template for BAT paragraph

  • Click here! 
    At 06:36:50 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 220412 ***A*** (trigger=1102281).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 123.968, +30.322 which is 
   RA(J2000) = 08h 15m 52s
   Dec(J2000) = +30d 19' 19"
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 ~1175 counts/sec (15-350 keV), at ~1 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: 68.16 s +/- 2.90513 s
  Estimated T50 duration: 26.368 s +/- 3.08265 s
  Estimated Peak Interval: MET   671438240.19199991 +/- 0.500000 s
  Estimated background rate 1:     4626.042 near MET 671438222.560000 s
  Estimated background rate 2:     4639.439 near MET 671438366.976000 s
  Estimated total duration: 78.912 s (for data selection)
       (from MET 671438230.720000 to MET 671438309.632000)
  Estimated total fluence: 10304.087910 count
  Created GTI with 4 entries
------------------------------------------

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

    bat_grb_pos_cat.sh 123.968 30.322 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 123.968 30.322
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 4 12 6 196.323115  -40.955257
 Obj: 2022 4 12 6 113.724238  19.348357
  • the object visibility at GSFC, Greenbelt, Maryland 
     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2022 4 12 6 149.245701  -44.670792
 Obj: 2022 4 12 6 103.301995  43.524865
  • the object visibility at MMT, Mt. Hopkins, Arizona 
     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2022 4 12 6 143.030794  -40.476535
 Obj: 2022 4 12 6 99.416636  48.801316
  • the object visibility at Hale Telescope, Palomar Mt., California 
     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2022 4 12 6 107.069482  -18.955462
 Obj: 2022 4 12 6 140.602110  76.109366
  • the object visibility at Mauna Kea, Hawaii 
     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2022 4 12 6 115.340544  21.355651
 Obj: 2022 4 12 6 219.462183  14.885948
  • the object visibility at Siding Spring Obs., Australia 
     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2022 4 12 6 66.069409  43.922137
 Obj: 2022 4 12 6 256.284491  38.289706
  • the object visibility at Tokyo, Japan 
     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2022 4 12 6 253.127640  -11.785358
 Obj: 2022 4 12 6 149.824880  -23.488925
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain 
     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2022 4 12 6 317.895299  -62.433657
 Obj: 2022 4 12 6 114.894514  -18.379198
  • the object visibility at Gemini South, Cerro Pachon, Chile 
     
 
 
The data/results are in /local/data/bat1/prebascript/trigger1102281/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:
Tue Apr 12 02:58:52 EDT 2022