TDRSS lightcurve for Trigger=1091101

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 27 Dec 21 23:32:22 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1091101,   Seg_Num: 0
GRB_RA:          132.126d {+08h 48m 30s} (J2000),
                 132.403d {+08h 49m 37s} (current),
                 131.495d {+08h 45m 59s} (1950)
GRB_DEC:          -2.702d {-02d 42' 05"} (J2000),
                  -2.784d {-02d 47' 02"} (current),
                  -2.516d {-02d 30' 57"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       998 [cnts]    Image_Peak=93 [image_cnts]
TRIGGER_DUR:     0.256 [sec] 
TRIGGER_INDEX:   36     E_range: 25-100 keV
BKG_INTEN:       18918 [cnts]
BKG_TIME:        84715.66 SOD {23:31:55.66} UT
BKG_DUR:         8 [sec]
GRB_DATE:        19575 TJD;   361 DOY;   21/12/27
GRB_TIME:        84726.86 SOD {23:32:06.86} UT
GRB_PHI:          44.11 [deg]
GRB_THETA:        32.08 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     18.00 [sigma]
IMAGE_SIGNIF:    8.71 [sigma]
MERIT_PARAMS:     +1  +0  +0  -2  +2  -1  +0  +0 +73  +0 
SUN_POSTN:       277.02d {+18h 28m 04s}  -23.28d {-23d 16' 44"}
SUN_DIST:        136.79 [deg]   Sun_angle= 9.6 [hr] (West of Sun)
MOON_POSTN:      197.47d {+13h 09m 52s}   -3.63d {-03d 37' 43"}
MOON_DIST:        64.95 [deg]
MOON_ILLUM:      41 [%]
GAL_COORDS:      229.82, 24.40 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      135.39,-19.75 [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 = 55.96,19.80 [deg].

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 27 Dec 21 23:48:55 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1091101,   Seg_Num: 0
GRB_RA:          132.126d {+08h 48m 30s} (J2000),
                 132.403d {+08h 49m 37s} (current),
                 131.495d {+08h 45m 59s} (1950)
GRB_DEC:          -2.702d {-02d 42' 05"} (J2000),
                  -2.784d {-02d 47' 02"} (current),
                  -2.516d {-02d 30' 57"} (1950)
GRB_DATE:        19575 TJD;   361 DOY;   21/12/27
GRB_TIME:        84726.86 SOD {23:32:06.86} UT
TRIGGER_INDEX:   36
GRB_PHI:          44.11 [deg]
GRB_THETA:        32.08 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     0.256 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     18.00 [sigma]
IMAGE_SIGNIF:    8.71 [sigma]
LC_URL:          sw01091101000msb.lc

GCN template for BAT paragraph

  • Click here! 
    At 23:32:06 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 211227 ***A*** (trigger=1091101).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 132.126, -2.702 which is 
   RA(J2000) = 08h 48m 30s
   Dec(J2000) = -02d 42' 05"
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 ~5351 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: 69.376 s +/- 4.10399 s
  Estimated T50 duration: 27.136 s +/- 2.90196 s
  Estimated Peak Interval: MET   662340799.80799997 +/- 0.500000 s
  Estimated background rate 1:     4735.294 near MET 662340743.168000 s
  Estimated background rate 2:     4718.917 near MET 662340902.208000 s
  Estimated total duration: 108.16 s (for data selection)
       (from MET 662340755.136000 to MET 662340863.296000)
  Estimated total fluence: 95702.978083 count
  Created GTI with 28 entries
------------------------------------------

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

    bat_grb_pos_cat.sh 132.126 -2.702 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 132.126 -2.702
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: 2021 12 27 23 69.954547  -12.443819
 Obj: 2021 12 27 23 245.961589  -30.686486
  • the object visibility at GSFC, Greenbelt, Maryland 
     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2021 12 27 23 49.671390  15.018280
 Obj: 2021 12 27 23 213.784849  -56.579670
  • the object visibility at MMT, Mt. Hopkins, Arizona 
     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2021 12 27 23 45.090064  17.605201
 Obj: 2021 12 27 23 202.488994  -57.492839
  • the object visibility at Hale Telescope, Palomar Mt., California 
     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2021 12 27 23 11.533682  46.024647
 Obj: 2021 12 27 23 119.787127  -58.859847
  • the object visibility at Mauna Kea, Hawaii 
     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2021 12 27 23 270.960167  47.953620
 Obj: 2021 12 27 23 83.539318  -5.249389
  • the object visibility at Siding Spring Obs., Australia 
     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2021 12 27 23 304.224889  6.625810
 Obj: 2021 12 27 23 82.701494  5.624218
  • the object visibility at Tokyo, Japan 
     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2021 12 27 23 92.340101  -59.326585
 Obj: 2021 12 27 23 282.898101  16.735454
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain 
     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2021 12 27 23 68.194570  8.928272
 Obj: 2021 12 27 23 290.208586  -25.834895
  • the object visibility at Gemini South, Cerro Pachon, Chile 
     
 
 
The data/results are in /local/data/bat1/prebascript/trigger1091101/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:
Mon Dec 27 18:50:43 EST 2021