TDRSS lightcurve for Trigger=1015873

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 04 Jan 21 11:27:12 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1015873,   Seg_Num: 0
GRB_RA:          103.705d {+06h 54m 49s} (J2000),
                 104.213d {+06h 56m 51s} (current),
                 102.491d {+06h 49m 58s} (1950)
GRB_DEC:         +64.661d {+64d 39' 39"} (J2000),
                 +64.632d {+64d 37' 57"} (current),
                 +64.724d {+64d 43' 26"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       2033 [cnts]    Image_Peak=197 [image_cnts]
TRIGGER_DUR:     0.512 [sec] 
TRIGGER_INDEX:   121     E_range: 15-50 keV
BKG_INTEN:       18719 [cnts]
BKG_TIME:        41205.72 SOD {11:26:45.72} UT
BKG_DUR:         8 [sec]
GRB_DATE:        19218 TJD;     4 DOY;   21/01/04
GRB_TIME:        41219.10 SOD {11:26:59.10} UT
GRB_PHI:         -49.88 [deg]
GRB_THETA:        20.01 [deg]
SOLN_STATUS:     0x20000003
RATE_SIGNIF:     23.38 [sigma]
IMAGE_SIGNIF:    11.40 [sigma]
MERIT_PARAMS:     +1  +0  +0  -1  +1  +1  +0  +0 +74  +0 
SUN_POSTN:       285.56d {+19h 02m 14s}  -22.67d {-22d 39' 54"}
SUN_DIST:        138.02 [deg]   Sun_angle= -11.9 [hr] (East of Sun)
MOON_POSTN:      172.37d {+11h 29m 30s}   +9.02d {+09d 01' 14"}
MOON_DIST:        72.60 [deg]
MOON_ILLUM:      71 [%]
GAL_COORDS:      151.03, 24.69 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       97.79, 41.59 [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 = 150.99,3.62 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This BAT event is temporally(0.0<100sec) coincident with the FERMI_GBM event (trignum=631452424).

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 04 Jan 21 11:43:40 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1015873,   Seg_Num: 0
GRB_RA:          103.705d {+06h 54m 49s} (J2000),
                 104.213d {+06h 56m 51s} (current),
                 102.491d {+06h 49m 58s} (1950)
GRB_DEC:         +64.661d {+64d 39' 39"} (J2000),
                 +64.632d {+64d 37' 57"} (current),
                 +64.724d {+64d 43' 26"} (1950)
GRB_DATE:        19218 TJD;     4 DOY;   21/01/04
GRB_TIME:        41219.10 SOD {11:26:59.10} UT
TRIGGER_INDEX:   121
GRB_PHI:         -49.88 [deg]
GRB_THETA:        20.01 [deg]
DELTA_TIME:      -57.00 [sec]
TRIGGER_DUR:     0.512 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     23.38 [sigma]
IMAGE_SIGNIF:    11.40 [sigma]
LC_URL:          sw01015873000msb.lc

GCN template for BAT paragraph

  • Click here! 
    At 11:26:59 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 210104 ***A*** (trigger=1015873).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 103.705, +64.661 which is 
   RA(J2000) = 06h 54m 49s
   Dec(J2000) = +64d 39' 39"
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 ~16359 counts/sec (15-350 keV), at ~21 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: 31.104 s +/- 0.729712 s
  Estimated T50 duration: 14.336 s +/- 0.768 s
  Estimated Peak Interval: MET   631452472.51199996 +/- 0.500000 s
  Estimated background rate 1:     3966.301 near MET 631452432.640000 s
  Estimated background rate 2:     3765.173 near MET 631452561.088000 s
  Estimated total duration: 46.976 s (for data selection)
       (from MET 631452444.480000 to MET 631452491.456000)
  Estimated total fluence: 114592.058385 count
  Created GTI with 46 entries
------------------------------------------

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

    bat_grb_pos_cat.sh 103.705 64.661 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 103.705 64.661
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 4 11 285.921993  -16.785137
 Obj: 2021 1 4 11 148.233239  35.569942
  • the object visibility at GSFC, Greenbelt, Maryland 
     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2021 1 4 11 272.511487  -43.029519
 Obj: 2021 1 4 11 151.492974  43.644149
  • the object visibility at MMT, Mt. Hopkins, Arizona 
     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2021 1 4 11 267.600290  -48.074504
 Obj: 2021 1 4 11 152.010498  47.503635
  • the object visibility at Hale Telescope, Palomar Mt., California 
     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2021 1 4 11 292.790413  -82.225282
 Obj: 2021 1 4 11 174.518998  44.765418
  • the object visibility at Mauna Kea, Hawaii 
     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2021 1 4 11 46.305028  -19.336357
 Obj: 2021 1 4 11 198.517582  -12.544348
  • the object visibility at Siding Spring Obs., Australia 
     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2021 1 4 11 83.680267  -33.250026
 Obj: 2021 1 4 11 210.984909  42.126723
  • the object visibility at Tokyo, Japan 
     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2021 1 4 11 323.278087  28.657643
 Obj: 2021 1 4 11 166.288875  6.900419
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain 
     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2021 1 4 11 288.828729  13.030312
 Obj: 2021 1 4 11 150.840088  -28.685356
  • the object visibility at Gemini South, Cerro Pachon, Chile 
     
 
 
The data/results are in /local/data/bat1/prebascript/trigger1015873/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  4 06:44:23 EST 2021