TDRSS lightcurve for Trigger=1093860

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 18 Feb 22 22:30:15 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1093860,   Seg_Num: 0
GRB_RA:          133.830d {+08h 55m 19s} (J2000),
                 134.169d {+08h 56m 41s} (current),
                 133.063d {+08h 52m 15s} (1950)
GRB_DEC:         +31.984d {+31d 59' 02"} (J2000),
                 +31.898d {+31d 53' 54"} (current),
                 +32.175d {+32d 10' 31"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=1598 [image_cnts]
TRIGGER_DUR:     64.000 [sec] 
TRIGGER_INDEX:   20000     E_range: 15-50 keV
BKG_INTEN:       0 [cnts]
BKG_TIME:        0.00 SOD {00:00:00.00} UT
BKG_DUR:         0 [sec]
GRB_DATE:        19628 TJD;    49 DOY;   22/02/18
GRB_TIME:        80939.35 SOD {22:28:59.35} UT
GRB_PHI:          19.00 [deg]
GRB_THETA:        13.20 [deg]
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    10.61 [sigma]
MERIT_PARAMS:     +1  +0  +0  +6  +1  +0  +0  +0 +89  +0 
SUN_POSTN:       332.33d {+22h 09m 19s}  -11.38d {-11d 22' 53"}
SUN_DIST:        153.52 [deg]   Sun_angle= -10.8 [hr] (East of Sun)
MOON_POSTN:      179.01d {+11h 56m 03s}   +5.19d {+05d 11' 19"}
MOON_DIST:        49.66 [deg]
MOON_ILLUM:      95 [%]
GAL_COORDS:      192.40, 39.05 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      127.26, 14.04 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This is an image trigger.  (The RATE_SIGNIF & BKG_{INTEN, TIME, DUR} are undefined.)  
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 = 53.66,18.36 [deg].

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 18 Feb 22 22:46:08 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1093860,   Seg_Num: 0
GRB_RA:          133.830d {+08h 55m 19s} (J2000),
                 134.169d {+08h 56m 41s} (current),
                 133.063d {+08h 52m 15s} (1950)
GRB_DEC:         +31.984d {+31d 59' 02"} (J2000),
                 +31.898d {+31d 53' 54"} (current),
                 +32.175d {+32d 10' 31"} (1950)
GRB_DATE:        19628 TJD;    49 DOY;   22/02/18
GRB_TIME:        80939.35 SOD {22:28:59.35} UT
TRIGGER_INDEX:   20000
GRB_PHI:          19.00 [deg]
GRB_THETA:        13.20 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     64.000 [sec] 
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    10.61 [sigma]
LC_URL:          sw01093860000msb.lc

GCN template for BAT paragraph

  • Click here! 
    At 22:28:59 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 220218 ***A*** (trigger=1093860).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 133.830, +31.984 which is 
   RA(J2000) = 08h 55m 19s
   Dec(J2000) = +31d 59' 02"
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 ~778 counts/sec (15-350 keV), at ~183 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: 146.432 s +/- 64.1636 s
  Estimated T50 duration: 146.432 s +/- 93.9084 s
  Estimated Peak Interval: MET   666916224.89599991 +/- 0.500000 s
  Estimated background rate 1:     3161.730 near MET 666916171.648000 s
  Estimated background rate 2:     3591.919 near MET 666916349.824000 s
  Estimated total duration: 146.432 s (for data selection)
       (from MET 666916199.296000 to MET 666916345.728000)
  Estimated total fluence: -21237.739812 count
  Created GTI with 5 entries
------------------------------------------

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

    bat_grb_pos_cat.sh 133.830 31.984 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 133.830 31.984
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 2 18 22 67.843072  8.406554
 Obj: 2022 2 18 22 242.801140  17.511574
  • the object visibility at GSFC, Greenbelt, Maryland 
     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2022 2 18 22 43.774454  35.301556
 Obj: 2022 2 18 22 223.545356  -8.906055
  • the object visibility at MMT, Mt. Hopkins, Arizona 
     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2022 2 18 22 36.932118  37.302162
 Obj: 2022 2 18 22 219.472128  -11.003625
  • the object visibility at Hale Telescope, Palomar Mt., California 
     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2022 2 18 22 342.641715  57.402302
 Obj: 2022 2 18 22 189.344426  -37.625157
  • the object visibility at Mauna Kea, Hawaii 
     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2022 2 18 22 266.957479  27.223222
 Obj: 2022 2 18 22 103.589896  -50.514383
  • the object visibility at Siding Spring Obs., Australia 
     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2022 2 18 22 284.163513  0.407626
 Obj: 2022 2 18 22 130.623919  -0.921329
  • the object visibility at Tokyo, Japan 
     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2022 2 18 22 98.713639  -38.778014
 Obj: 2022 2 18 22 255.308804  60.839506
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain 
     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2022 2 18 22 87.415951  18.507218
 Obj: 2022 2 18 22 240.479146  -13.097029
  • the object visibility at Gemini South, Cerro Pachon, Chile 
     
 
 
The data/results are in /local/data/bat1/prebascript/trigger1093860/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 Feb 18 17:46:45 EST 2022