TDRSS lightcurve for Trigger=879909

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 28 Dec 18 02:53:37 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     879909,   Seg_Num: 0
GRB_RA:           49.831d {+03h 19m 19s} (J2000),
                  50.093d {+03h 20m 22s} (current),
                  49.141d {+03h 16m 34s} (1950)
GRB_DEC:         +13.195d {+13d 11' 42"} (J2000),
                 +13.263d {+13d 15' 46"} (current),
                 +13.014d {+13d 00' 51"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       5189 [cnts]    Image_Peak=443 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   147     E_range: 25-100 keV
BKG_INTEN:       21663 [cnts]
BKG_TIME:        10385.84 SOD {02:53:05.84} UT
BKG_DUR:         8 [sec]
GRB_DATE:        18480 TJD;   362 DOY;   18/12/28
GRB_TIME:        10397.62 SOD {02:53:17.62} UT
GRB_PHI:         114.59 [deg]
GRB_THETA:        32.85 [deg]
SOLN_STATUS:     0x20000003
RATE_SIGNIF:     53.74 [sigma]
IMAGE_SIGNIF:    15.47 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +2  +4  +0  +0 +69  +0 
SUN_POSTN:       276.87d {+18h 27m 29s}  -23.29d {-23d 17' 08"}
SUN_DIST:        134.67 [deg]   Sun_angle= -8.9 [hr] (East of Sun)
MOON_POSTN:      172.05d {+11h 28m 13s}   +7.90d {+07d 54' 08"}
MOON_DIST:       118.60 [deg]
MOON_ILLUM:      64 [%]
GAL_COORDS:      169.32,-36.03 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       50.92, -4.96 [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 = 194.20,10.87 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This BAT event is temporally(3.0<100sec) coincident with the FERMI_GBM event (trignum=567658399).  

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 28 Dec 18 03:14:05 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     879909,   Seg_Num: 0
GRB_RA:           49.831d {+03h 19m 19s} (J2000),
                  50.093d {+03h 20m 22s} (current),
                  49.141d {+03h 16m 34s} (1950)
GRB_DEC:         +13.195d {+13d 11' 42"} (J2000),
                 +13.263d {+13d 15' 46"} (current),
                 +13.014d {+13d 00' 51"} (1950)
GRB_DATE:        18480 TJD;   362 DOY;   18/12/28
GRB_TIME:        10397.62 SOD {02:53:17.62} UT
TRIGGER_INDEX:   147
GRB_PHI:         114.59 [deg]
GRB_THETA:        32.85 [deg]
DELTA_TIME:      -56.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     53.74 [sigma]
IMAGE_SIGNIF:    15.47 [sigma]
LC_URL:          sw00879909000msb.lc

GCN template for BAT paragraph

  • Click here!
    At 02:53:17 UT, the Swift Burst Alert Telescope (BAT) triggered and
    located GRB 181228 ***A*** (trigger=879909).  Swift slewed immediately to the burst.
    The BAT on-board calculated location is 
    RA, Dec 49.831, +13.195 which is 
       RA(J2000) = 03h 19m 19s
       Dec(J2000) = +13d 11' 42"
    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 ~6979 counts/sec (15-350 keV), at ~13 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: 17.92 s +/- 0.286217 s
      Estimated T50 duration: 9.728 s +/- 0.202386 s
      Estimated Peak Interval: MET   567658433.21600008 +/- 0.500000 s
      Estimated background rate 1:     5341.280 near MET 567658405.120000 s
      Estimated background rate 2:     5435.491 near MET 567658524.736000 s
      Estimated total duration: 29.312 s (for data selection)
           (from MET 567658415.040000 to MET 567658444.352000)
      Estimated total fluence: 71680.496675 count
      Created GTI with 18 entries
    ------------------------------------------
     
    

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

    bat_grb_pos_cat.sh 49.831 13.195 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 49.831 13.195
    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: 2018 12 28 3 109.832496  -58.167879
     Obj: 2018 12 28 3 29.638851  61.393659
    
  • the object visibility at GSFC, Greenbelt, Maryland
     
    MMT Observatory, Mt. Hopkins, Arizona
          TimeUT       Azimuth     Elevation
     Sun: 2018 12 28 3 80.194895  -31.140332
     Obj: 2018 12 28 3 310.706116  64.030605
    
  • the object visibility at MMT, Mt. Hopkins, Arizona
     
    Hale Telescope, Palomar Mountain, California
          TimeUT       Azimuth     Elevation
     Sun: 2018 12 28 3 78.390698  -26.493041
     Obj: 2018 12 28 3 304.258878  59.009009
    
  • the object visibility at Hale Telescope, Palomar Mt., California
     
    Mauna Kea, Hawaii
          TimeUT       Azimuth     Elevation
     Sun: 2018 12 28 3 60.446772  10.313415
     Obj: 2018 12 28 3 265.205799  28.121581
    
  • the object visibility at Mauna Kea, Hawaii
     
    Siding Spring Obs., Australia
          TimeUT       Azimuth     Elevation
     Sun: 2018 12 28 3 121.003761  75.790709
     Obj: 2018 12 28 3 273.834525  -32.359081
    
  • the object visibility at Siding Spring Obs., Australia
     
    Tokyo, Japan
          TimeUT       Azimuth     Elevation
     Sun: 2018 12 28 3 356.327365  32.181731
     Obj: 2018 12 28 3 228.638908  -27.021834
    
  • the object visibility at Tokyo, Japan
     
    William Herschel Telescope, La Palma, Canary Islands, Spain
          TimeUT       Azimuth     Elevation
     Sun: 2018 12 28 3 263.069617  -65.827963
     Obj: 2018 12 28 3 93.981025  20.994271
    
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
     
    Gemini South, Cerro Pachon, Chile
          TimeUT       Azimuth     Elevation
     Sun: 2018 12 28 3 28.748072  -30.544413
     Obj: 2018 12 28 3 153.267494  42.323461
    
  • the object visibility at Gemini South, Cerro Pachon, Chile
     
     
     
    The data/results are in /local/data/bat1/prebascript/trigger879909/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:
    Thu Dec 27 22:14:23 EST 2018