TDRSS lightcurve for Trigger=743086

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 18 Mar 17 15:28:09 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     743086,   Seg_Num: 0
GRB_RA:          284.279d {+18h 57m 07s} (J2000),
                 284.490d {+18h 57m 58s} (current),
                 283.668d {+18h 54m 40s} (1950)
GRB_DEC:          +6.269d {+06d 16' 10"} (J2000),
                  +6.293d {+06d 17' 36"} (current),
                  +6.202d {+06d 12' 08"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       1901 [cnts]    Image_Peak=108 [image_cnts]
TRIGGER_DUR:     0.512 [sec] 
TRIGGER_INDEX:   124     E_range: 25-100 keV
BKG_INTEN:       20879 [cnts]
BKG_TIME:        55661.22 SOD {15:27:41.22} UT
BKG_DUR:         8 [sec]
GRB_DATE:        17830 TJD;    77 DOY;   17/03/18
GRB_TIME:        55672.55 SOD {15:27:52.55} UT
GRB_PHI:          25.89 [deg]
GRB_THETA:        29.98 [deg]
SOLN_STATUS:     0x20000003
RATE_SIGNIF:     14.93 [sigma]
IMAGE_SIGNIF:    7.21 [sigma]
MERIT_PARAMS:     +1  +0  +0  -1  +2  -3  +0  +1 -27  +0 
SUN_POSTN:       358.37d {+23h 53m 29s}   -0.71d {-00d 42' 19"}
SUN_DIST:         74.06 [deg]   Sun_angle= 4.9 [hr] (West of Sun)
MOON_POSTN:      245.17d {+16h 20m 42s}  -16.17d {-16d 10' 05"}
MOON_DIST:        44.92 [deg]
MOON_ILLUM:      69 [%]
GAL_COORDS:       39.16,  1.60 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      286.26, 28.91 [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 = 209.07,-10.58 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This BAT event is temporally(1.0<100sec) coincident with the FERMI_GBM event (trignum=511543678).  

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 18 Mar 17 16:02:14 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     743086,   Seg_Num: 0
GRB_RA:          284.279d {+18h 57m 07s} (J2000),
                 284.490d {+18h 57m 58s} (current),
                 283.668d {+18h 54m 40s} (1950)
GRB_DEC:          +6.269d {+06d 16' 10"} (J2000),
                  +6.293d {+06d 17' 36"} (current),
                  +6.202d {+06d 12' 08"} (1950)
GRB_DATE:        17830 TJD;    77 DOY;   17/03/18
GRB_TIME:        55672.55 SOD {15:27:52.55} UT
TRIGGER_INDEX:   124
GRB_PHI:          25.89 [deg]
GRB_THETA:        29.98 [deg]
DELTA_TIME:      -11.00 [sec]
TRIGGER_DUR:     0.512 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     14.93 [sigma]
IMAGE_SIGNIF:    7.21 [sigma]
LC_URL:          sw00743086000msb.lc

GCN template for BAT paragraph

  • Click here!
    At 15:27:52 UT, the Swift Burst Alert Telescope (BAT) triggered and
    located GRB 170318 ***A*** (trigger=743086).  Swift slewed immediately to the burst.
    The BAT on-board calculated location is 
    RA, Dec 284.279, +6.269 which is 
       RA(J2000) = 18h 57m 07s
       Dec(J2000) = +06d 16' 10"
    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 ~2351 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: 25.472 s +/- 24.032 s
      Estimated T50 duration: 25.216 s +/- 24.224 s
      Estimated Peak Interval: MET   511543691.58399999 +/- 0.500000 s
      Estimated background rate 1:     5204.983 near MET 511543679.040000 s
      Estimated background rate 2:     5468.506 near MET 511543809.536000 s
      Estimated total duration: 51.072 s (for data selection)
           (from MET 511543690.880000 to MET 511543741.952000)
      Estimated total fluence: 1584.426094 count
      Created GTI with 6 entries
    ------------------------------------------
     
    

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

    bat_grb_pos_cat.sh 284.279 6.269 0.083
    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: 2017 3 18 16 331.193995  46.480856
     Obj: 2017 3 18 16 71.064218  31.107599
    
  • the object visibility at GSFC, Greenbelt, Maryland
     
    MMT Observatory, Mt. Hopkins, Arizona
          TimeUT       Azimuth     Elevation
     Sun: 2017 3 18 16 291.967562  30.054935
     Obj: 2017 3 18 16 41.392800  58.151288
    
  • the object visibility at MMT, Mt. Hopkins, Arizona
     
    Hale Telescope, Palomar Mountain, California
          TimeUT       Azimuth     Elevation
     Sun: 2017 3 18 16 288.650135  24.744327
     Obj: 2017 3 18 16 29.730888  59.736950
    
  • the object visibility at Hale Telescope, Palomar Mt., California
     
    Mauna Kea, Hawaii
          TimeUT       Azimuth     Elevation
     Sun: 2017 3 18 16 267.943777  -7.752002
     Obj: 2017 3 18 16 296.836336  62.990372
    
  • the object visibility at Mauna Kea, Hawaii
     
    Siding Spring Obs., Australia
          TimeUT       Azimuth     Elevation
     Sun: 2017 3 18 16 316.697680  -49.304766
     Obj: 2017 3 18 16 259.132579  5.570760
    
  • the object visibility at Siding Spring Obs., Australia
     
    Tokyo, Japan
          TimeUT       Azimuth     Elevation
     Sun: 2017 3 18 16 197.567305  -55.047972
     Obj: 2017 3 18 16 261.347527  -1.504596
    
  • the object visibility at Tokyo, Japan
     
    William Herschel Telescope, La Palma, Canary Islands, Spain
          TimeUT       Azimuth     Elevation
     Sun: 2017 3 18 16 59.141764  41.989302
     Obj: 2017 3 18 16 107.484117  -17.209688
    
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
     
    Gemini South, Cerro Pachon, Chile
          TimeUT       Azimuth     Elevation
     Sun: 2017 3 18 16 205.852706  57.694227
     Obj: 2017 3 18 16 111.598249  21.550997
    
  • the object visibility at Gemini South, Cerro Pachon, Chile
     
     
     
    The data/results are in /local/data/bat1/prebascript/trigger743086/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:
    Sat Mar 18 12:11:23 EDT 2017