TDRSS lightcurve for Trigger=1016881

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 12 Jan 21 01:41:15 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1016881,   Seg_Num: 0
GRB_RA:          218.999d {+14h 36m 00s} (J2000),
                 219.220d {+14h 36m 53s} (current),
                 218.472d {+14h 33m 53s} (1950)
GRB_DEC:         +33.070d {+33d 04' 13"} (J2000),
                 +32.979d {+32d 58' 46"} (current),
                 +33.287d {+33d 17' 15"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       3067 [cnts]    Image_Peak=225 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   146     E_range: 25-100 keV
BKG_INTEN:       15489 [cnts]
BKG_TIME:        5805.68 SOD {01:36:45.68} UT
BKG_DUR:         8 [sec]
GRB_DATE:        19226 TJD;    12 DOY;   21/01/12
GRB_TIME:        5823.79 SOD {01:37:03.79} UT
GRB_PHI:          -1.89 [deg]
GRB_THETA:        24.25 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     22.80 [sigma]
IMAGE_SIGNIF:    10.89 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +2  +0  +0  +0  +0  +0 
SUN_POSTN:       293.84d {+19h 35m 21s}  -21.63d {-21d 37' 41"}
SUN_DIST:         89.64 [deg]   Sun_angle= 5.0 [hr] (West of Sun)
MOON_POSTN:      278.07d {+18h 32m 16s}  -24.91d {-24d 54' 45"}
MOON_DIST:        80.54 [deg]
MOON_ILLUM:      2 [%]
GAL_COORDS:       54.05, 66.69 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      202.28, 45.27 [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 at longitude,latitude = 15.09,12.48 [deg].

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 12 Jan 21 01:53:52 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1016881,   Seg_Num: 0
GRB_RA:          218.999d {+14h 36m 00s} (J2000),
                 219.220d {+14h 36m 53s} (current),
                 218.472d {+14h 33m 53s} (1950)
GRB_DEC:         +33.070d {+33d 04' 13"} (J2000),
                 +32.979d {+32d 58' 46"} (current),
                 +33.287d {+33d 17' 15"} (1950)
GRB_DATE:        19226 TJD;    12 DOY;   21/01/12
GRB_TIME:        5823.79 SOD {01:37:03.79} UT
TRIGGER_INDEX:   146
GRB_PHI:          -1.89 [deg]
GRB_THETA:        24.25 [deg]
DELTA_TIME:      -51.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     22.80 [sigma]
IMAGE_SIGNIF:    10.89 [sigma]
LC_URL:          sw01016881000msb.lc

GCN template for BAT paragraph

  • Click here! 
    At 01:37:03 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 210112 ***A*** (trigger=1016881).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 218.999, +33.070 which is 
   RA(J2000) = 14h 36m 00s
   Dec(J2000) = +33d 04' 13"
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 ~20869 counts/sec (15-350 keV), at ~68 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: 92.672 s +/- 5.12 s
  Estimated T50 duration: 12.288 s +/- 4.096 s
  Estimated Peak Interval: MET   632108318.78399992 +/- 0.500000 s
  Estimated background rate 1:     3672.734 near MET 632108232.000000 s
  Estimated background rate 2:     3821.826 near MET 632108415.040000 s
  Estimated total duration: 156.16 s (for data selection)
       (from MET 632108238.400000 to MET 632108394.560000)
  Estimated total fluence: 306283.474935 count
  Created GTI with 25 entries
------------------------------------------

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

    bat_grb_pos_cat.sh 218.999 33.070 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 218.999 33.070
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: 2021 1 12 1 87.665695  -32.970560
 Obj: 2021 1 12 1 188.916605  -17.438154
  • the object visibility at GSFC, Greenbelt, Maryland 
     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2021 1 12 1 67.254401  -4.488380
 Obj: 2021 1 12 1 158.619512  -21.562935
  • the object visibility at MMT, Mt. Hopkins, Arizona 
     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2021 1 12 1 64.191947  -0.573119
 Obj: 2021 1 12 1 153.981052  -18.009715
  • the object visibility at Hale Telescope, Palomar Mt., California 
     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2021 1 12 1 43.032469  34.956079
 Obj: 2021 1 12 1 128.326932  -6.087631
  • the object visibility at Mauna Kea, Hawaii 
     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2021 1 12 1 244.179398  70.872369
 Obj: 2021 1 12 1 135.481793  6.688868
  • the object visibility at Siding Spring Obs., Australia 
     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2021 1 12 1 323.931980  24.740927
 Obj: 2021 1 12 1 98.878428  57.301916
  • the object visibility at Tokyo, Japan 
     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2021 1 12 1 144.114931  -81.359464
 Obj: 2021 1 12 1 231.624727  -0.028380
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain 
     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2021 1 12 1 54.607552  -13.475709
 Obj: 2021 1 12 1 254.891024  -76.104345
  • the object visibility at Gemini South, Cerro Pachon, Chile 
     
 
 
The data/results are in /local/data/bat1/prebascript/trigger1016881/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:
Mon Jan 11 20:54:04 EST 2021