TDRSS lightcurve for Trigger=880127

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 28 Dec 18 23:51:34 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     880127,   Seg_Num: 0
GRB_RA:           18.159d {+01h 12m 38s} (J2000),
                  18.343d {+01h 13m 22s} (current),
                  17.673d {+01h 10m 42s} (1950)
GRB_DEC:         -60.951d {-60d 57' 03"} (J2000),
                 -60.851d {-60d 51' 01"} (current),
                 -61.216d {-61d 12' 56"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       27505 [cnts]    Image_Peak=436 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   158     E_range: 50-350 keV
BKG_INTEN:       168037 [cnts]
BKG_TIME:        85809.84 SOD {23:50:09.84} UT
BKG_DUR:         8 [sec]
GRB_DATE:        18480 TJD;   362 DOY;   18/12/28
GRB_TIME:        85828.40 SOD {23:50:28.40} UT
GRB_PHI:          10.01 [deg]
GRB_THETA:        19.27 [deg]
SOLN_STATUS:     0xC3
RATE_SIGNIF:     28.61 [sigma]
IMAGE_SIGNIF:    6.61 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +3  -4  +0  +0 -26  +0 
SUN_POSTN:       277.84d {+18h 31m 21s}  -23.24d {-23d 14' 25"}
SUN_DIST:         74.75 [deg]   Sun_angle= -6.7 [hr] (East of Sun)
MOON_POSTN:      183.61d {+12h 14m 25s}   +3.60d {+03d 35' 57"}
MOON_DIST:       121.67 [deg]
MOON_ILLUM:      55 [%]
GAL_COORDS:      298.33,-55.99 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      335.64,-59.57 [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 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 during a high background rate interval.

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 28 Dec 18 23:56:33 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     880127,   Seg_Num: 0
GRB_RA:           18.159d {+01h 12m 38s} (J2000),
                  18.343d {+01h 13m 22s} (current),
                  17.673d {+01h 10m 42s} (1950)
GRB_DEC:         -60.951d {-60d 57' 03"} (J2000),
                 -60.851d {-60d 51' 01"} (current),
                 -61.216d {-61d 12' 56"} (1950)
GRB_DATE:        18480 TJD;   362 DOY;   18/12/28
GRB_TIME:        85828.40 SOD {23:50:28.40} UT
TRIGGER_INDEX:   158
GRB_PHI:          10.01 [deg]
GRB_THETA:        19.27 [deg]
DELTA_TIME:      23056.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0xC3
RATE_SIGNIF:     28.61 [sigma]
IMAGE_SIGNIF:    6.61 [sigma]
LC_URL:          sw00880127000msb.lc

GCN template for BAT paragraph

  • Click here! 
    At 23:50:28 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 181228 ***A*** (trigger=880127).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 18.159, -60.951 which is 
   RA(J2000) = 01h 12m 38s
   Dec(J2000) = -60d 57' 03"
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 ~16501 counts/sec (15-350 keV), at ~7 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)
------------------------------------------
  Estimated T90 duration: 25.984 s +/- 5.82224 s
  Estimated T50 duration: 25.984 s +/- 11.9879 s
  Estimated Peak Interval: MET   567733855.42400002 +/- 0.500000 s
  Estimated background rate 1:    27703.126 near MET 567733828.800000 s
  Estimated background rate 2:    42636.327 near MET 567733857.664000 s
  Estimated total duration: 25.984 s (for data selection)
       (from MET 567733830.400000 to MET 567733856.384000)
  Estimated total fluence: -11510.002993 count
  Created GTI with 12 entries
------------------------------------------

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

    bat_grb_pos_cat.sh 18.159 -60.951 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 18.159 -60.951
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 23 69.933706  -12.354522
 Obj: 2018 12 28 23 353.429658  -10.485748
  • the object visibility at GSFC, Greenbelt, Maryland 
     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2018 12 28 23 49.638084  15.104064
 Obj: 2018 12 28 23 338.647271  -10.287034
  • the object visibility at MMT, Mt. Hopkins, Arizona 
     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2018 12 28 23 45.048841  17.687969
 Obj: 2018 12 28 23 336.282727  -13.759371
  • the object visibility at Hale Telescope, Palomar Mt., California 
     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2018 12 28 23 11.427260  46.078899
 Obj: 2018 12 28 23 329.178724  -18.206013
  • the object visibility at Mauna Kea, Hawaii 
     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2018 12 28 23 270.953025  47.862102
 Obj: 2018 12 28 23 344.705616  5.866436
  • the object visibility at Siding Spring Obs., Australia 
     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2018 12 28 23 304.140285  6.589358
 Obj: 2018 12 28 23 343.616530  -61.638031
  • the object visibility at Tokyo, Japan 
     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2018 12 28 23 92.361957  -59.235719
 Obj: 2018 12 28 23 20.540543  -7.018483
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain 
     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2018 12 28 23 68.269395  8.982394
 Obj: 2018 12 28 23 352.931953  59.068030
  • the object visibility at Gemini South, Cerro Pachon, Chile 
     
 
 
The data/results are in /local/data/bat1/prebascript/trigger880127/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 Dec 28 18:57:06 EST 2018