TDRSS lightcurve for Trigger=847216

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 11 Jul 18 07:28:58 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     847216,   Seg_Num: 0
GRB_RA:          249.658d {+16h 38m 38s} (J2000),
                 249.932d {+16h 39m 44s} (current),
                 248.919d {+16h 35m 40s} (1950)
GRB_DEC:         -20.833d {-20d 50' 00"} (J2000),
                 -20.869d {-20d 52' 07"} (current),
                 -20.735d {-20d 44' 05"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=44218 [image_cnts]
TRIGGER_DUR:     2344.000 [sec]   (=39.1 [min])
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:        18310 TJD;   192 DOY;   18/07/11
GRB_TIME:        24530.75 SOD {06:48:50.75} UT
GRB_PHI:         157.84 [deg]
GRB_THETA:        37.54 [deg]
SOLN_STATUS:     0x113
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    18.33 [sigma]
MERIT_PARAMS:     +1  +0  +0  +8  +1  +6  +0  +1 +78  +0 
SUN_POSTN:       110.54d {+07h 22m 09s}  +22.09d {+22d 05' 38"}
SUN_DIST:        142.31 [deg]   Sun_angle= -9.3 [hr] (East of Sun)
MOON_POSTN:       82.99d {+05h 31m 59s}  +19.80d {+19d 47' 47"}
MOON_DIST:       167.71 [deg]
MOON_ILLUM:      5 [%]
GAL_COORDS:      357.82, 17.06 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      251.04,  1.28 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This Notice was delayed by more than 60 sec past the end of the trigger integration interval;  
COMMENTS:        probably due to it occurring during a Malindi downlink session.  
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 matches a source in the ground catalog: IGR J16385-2057,   delta=0.115 [deg].  
COMMENTS:        This is not a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 313.00,18.06 [deg].

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 11 Jul 18 07:37:18 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     847216,   Seg_Num: 0
GRB_RA:          249.658d {+16h 38m 38s} (J2000),
                 249.932d {+16h 39m 44s} (current),
                 248.919d {+16h 35m 40s} (1950)
GRB_DEC:         -20.833d {-20d 50' 00"} (J2000),
                 -20.869d {-20d 52' 07"} (current),
                 -20.735d {-20d 44' 05"} (1950)
GRB_DATE:        18310 TJD;   192 DOY;   18/07/11
GRB_TIME:        24530.75 SOD {06:48:50.75} UT
TRIGGER_INDEX:   20000
GRB_PHI:         157.84 [deg]
GRB_THETA:        37.54 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     2344.000 [sec]   (=39.1 [min])
SOLN_STATUS:     0x113
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    18.33 [sigma]
LC_URL:          sw00847216000msb.lc

GCN template for BAT paragraph

  • Click here! 
    At 06:48:50 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 180711 ***A*** (trigger=847216).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 249.658, -20.833 which is 
   RA(J2000) = 16h 38m 38s
   Dec(J2000) = -20d 50' 00"
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 ~0 counts/sec (15-350 keV), at ~ 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

    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)
------------------------------------------

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

    bat_grb_pos_cat.sh 249.658 -20.833 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: 2018 7 11 7 206.674559  -24.172837
 Obj: 2018 7 11 7 59.395321  3.485504
  • the object visibility at GSFC, Greenbelt, Maryland 
     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2018 7 11 7 171.140889  -35.728272
 Obj: 2018 7 11 7 35.303247  28.715903
  • the object visibility at MMT, Mt. Hopkins, Arizona 
     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2018 7 11 7 164.783753  -33.046283
 Obj: 2018 7 11 7 29.178206  30.000555
  • the object visibility at Hale Telescope, Palomar Mt., California 
     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2018 7 11 7 126.665981  -23.910957
 Obj: 2018 7 11 7 343.579831  47.679557
  • the object visibility at Mauna Kea, Hawaii 
     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2018 7 11 7 117.984599  2.642009
 Obj: 2018 7 11 7 277.700837  29.589305
  • the object visibility at Siding Spring Obs., Australia 
     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2018 7 11 7 91.089633  40.120146
 Obj: 2018 7 11 7 290.679672  -6.836694
  • the object visibility at Tokyo, Japan 
     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2018 7 11 7 248.330208  6.488573
 Obj: 2018 7 11 7 86.287862  -40.642700
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain 
     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2018 7 11 7 278.248842  -60.145845
 Obj: 2018 7 11 7 79.374905  24.754035
  • the object visibility at Gemini South, Cerro Pachon, Chile 
     
 
 
The data/results are in /local/data/bat1/prebascript/trigger847216/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:
Wed Jul 11 03:37:43 EDT 2018