TDRSS lightcurve for Trigger=1154967

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 17 Feb 23 21:53:21 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1154967,   Seg_Num: 0
GRB_RA:          280.771d {+18h 43m 05s} (J2000),
                 281.137d {+18h 44m 33s} (current),
                 279.979d {+18h 39m 55s} (1950)
GRB_DEC:         -28.856d {-28d 51' 19"} (J2000),
                 -28.831d {-28d 49' 51"} (current),
                 -28.906d {-28d 54' 20"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       986 [cnts]    Image_Peak=84 [image_cnts]
TRIGGER_DUR:     0.064 [sec] 
TRIGGER_INDEX:   10427     E_range: 50-350 keV
BKG_INTEN:       7108 [cnts]
BKG_TIME:        78777.22 SOD {21:52:57.22} UT
BKG_DUR:         8 [sec]
GRB_DATE:        19992 TJD;    48 DOY;   23/02/17
GRB_TIME:        78790.66 SOD {21:53:10.66} UT
GRB_PHI:         -18.03 [deg]
GRB_THETA:        49.15 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     111.45 [sigma]
IMAGE_SIGNIF:    8.87 [sigma]
MERIT_PARAMS:     +1  +0  +0  -4  +3  -1  -5  +1 -64  +0 
SUN_POSTN:       331.11d {+22h 04m 26s}  -11.83d {-11d 49' 46"}
SUN_DIST:         49.43 [deg]   Sun_angle= 3.3 [hr] (West of Sun)
MOON_POSTN:      298.39d {+19h 53m 33s}  -25.91d {-25d 54' 19"}
MOON_DIST:        15.58 [deg]
MOON_ILLUM:      8 [%]
GAL_COORDS:        6.03,-11.05 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      279.47, -5.77 [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 = 203.95,-18.82 [deg].

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 17 Feb 23 22:10:44 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1154967,   Seg_Num: 0
GRB_RA:          280.771d {+18h 43m 05s} (J2000),
                 281.137d {+18h 44m 33s} (current),
                 279.979d {+18h 39m 55s} (1950)
GRB_DEC:         -28.856d {-28d 51' 19"} (J2000),
                 -28.831d {-28d 49' 51"} (current),
                 -28.906d {-28d 54' 20"} (1950)
GRB_DATE:        19992 TJD;    48 DOY;   23/02/17
GRB_TIME:        78790.90 SOD {21:53:10.90} UT
TRIGGER_INDEX:   10427
GRB_PHI:         -18.03 [deg]
GRB_THETA:        49.15 [deg]
DELTA_TIME:      72.00 [sec]
TRIGGER_DUR:     0.064 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     111.45 [sigma]
IMAGE_SIGNIF:    8.87 [sigma]
LC_URL:          sw01154967000msb.lc

GCN template for BAT paragraph

  • Click here! 
    At 21:53:10 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 230217 ***A*** (trigger=1154967).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 280.771, -28.856 which is 
   RA(J2000) = 18h 43m 05s
   Dec(J2000) = -28d 51' 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 ~15531 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

    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: 1.024 s +/- 0.128 s
  Estimated T50 duration: 0.384 s +/- 0.128 s
  Estimated Peak Interval: MET   698363622.01600003 +/- 0.500000 s
  Estimated background rate 1:     2207.465 near MET 698363609.920000 s
  Estimated background rate 2:     2236.311 near MET 698363715.840000 s
  Estimated total duration: 1.92 s (for data selection)
       (from MET 698363621.440000 to MET 698363623.360000)
  Estimated total fluence: 8790.114896 count
  Created GTI with 9 entries
------------------------------------------

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

    bat_grb_pos_cat.sh 280.771 -28.856 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 280.771 -28.856
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 2 17 22 67.500108  8.126480
 Obj: 2023 2 17 22 82.074781  -39.422929
  • the object visibility at GSFC, Greenbelt, Maryland 
     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2023 2 17 22 43.428033  34.964692
 Obj: 2023 2 17 22 62.747039  -10.972039
  • the object visibility at MMT, Mt. Hopkins, Arizona 
     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2023 2 17 22 36.623751  36.937074
 Obj: 2023 2 17 22 60.150144  -7.335500
  • the object visibility at Hale Telescope, Palomar Mt., California 
     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2023 2 17 22 342.828613  56.973874
 Obj: 2023 2 17 22 39.949289  27.533949
  • the object visibility at Mauna Kea, Hawaii 
     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2023 2 17 22 267.402268  27.416998
 Obj: 2023 2 17 22 263.072946  76.838239
  • the object visibility at Siding Spring Obs., Australia 
     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2023 2 17 22 284.507559  0.133334
 Obj: 2023 2 17 22 330.777286  20.051631
  • the object visibility at Tokyo, Japan 
     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2023 2 17 22 98.199410  -38.960082
 Obj: 2023 2 17 22 86.828984  -88.339975
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain 
     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2023 2 17 22 87.020443  18.737876
 Obj: 2023 2 17 22 46.961261  -10.999325
  • the object visibility at Gemini South, Cerro Pachon, Chile 
     
 
 
The data/results are in /local/data/bat1/prebascript/trigger1154967/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 17 17:11:22 EST 2023