TDRSS lightcurve for Trigger=1204595

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 26 Dec 23 05:30:12 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1204595,   Seg_Num: 0
GRB_RA:          245.080d {+16h 20m 19s} (J2000),
                 245.422d {+16h 21m 41s} (current),
                 244.368d {+16h 17m 28s} (1950)
GRB_DEC:         -15.883d {-15d 52' 57"} (J2000),
                 -15.939d {-15d 56' 18"} (current),
                 -15.764d {-15d 45' 49"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=2042 [image_cnts]
TRIGGER_DUR:     216.000 [sec]   (=3.6 [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:        20304 TJD;   360 DOY;   23/12/26
GRB_TIME:        19583.38 SOD {05:26:23.38} UT
GRB_PHI:         -58.28 [deg]
GRB_THETA:        42.08 [deg]
SOLN_STATUS:     0x513
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    7.61 [sigma]
MERIT_PARAMS:     +1  +0  +0  +8  +1  -2 -100  +0 -87  +0 
SUN_POSTN:       274.54d {+18h 18m 08s}  -23.37d {-23d 22' 11"}
SUN_DIST:         28.35 [deg]   Sun_angle= 1.9 [hr] (West of Sun)
MOON_POSTN:       84.05d {+05h 36m 12s}  +27.84d {+27d 50' 12"}
MOON_DIST:       159.06 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      358.96, 23.55 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      245.97,  5.50 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
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: Sco_X-1,   delta=0.261 [deg].  
COMMENTS:        This is not a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 9.80,-8.87 [deg].  
COMMENTS:           
COMMENTS:        This trigger occured while the StarTracker had lost lock, so it is possibly bogus.

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 26 Dec 23 05:38:54 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1204595,   Seg_Num: 0
GRB_RA:          245.080d {+16h 20m 19s} (J2000),
                 245.422d {+16h 21m 41s} (current),
                 244.368d {+16h 17m 28s} (1950)
GRB_DEC:         -15.883d {-15d 52' 57"} (J2000),
                 -15.939d {-15d 56' 18"} (current),
                 -15.764d {-15d 45' 49"} (1950)
GRB_DATE:        20304 TJD;   360 DOY;   23/12/26
GRB_TIME:        19583.38 SOD {05:26:23.38} UT
TRIGGER_INDEX:   20000
GRB_PHI:         -58.28 [deg]
GRB_THETA:        42.08 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     216.000 [sec]   (=3.6 [min])
SOLN_STATUS:     0x513
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    7.61 [sigma]
LC_URL:          sw01204595000msb.lc

GCN template for BAT paragraph

  • Click here! 
    At 05:26:23 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 231226 ***A*** (trigger=1204595).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 245.080, -15.883 which is 
   RA(J2000) = 16h 20m 19s
   Dec(J2000) = -15d 52' 57"
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 ~1475 counts/sec (15-350 keV), at ~138 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

    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: 53.248 s +/- 4.096 s
  Estimated T50 duration: 24.576 s +/- 4.096 s
  Estimated Peak Interval: MET   725261346.62399995 +/- 0.500000 s
  Estimated background rate 1:      927.742 near MET 725261256.000000 s
  Estimated background rate 2:     4515.869 near MET 725261399.872000 s
  Estimated total duration: 77.824 s (for data selection)
       (from MET 725261320.000000 to MET 725261397.824000)
  Estimated total fluence: 60244.610564 count
  Created GTI with 7 entries
------------------------------------------

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

    bat_grb_pos_cat.sh 245.080 -15.883 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 245.080 -15.883
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: 2023 12 26 5 171.691981  -74.248995
 Obj: 2023 12 26 5 232.785399  -57.234577
  • the object visibility at GSFC, Greenbelt, Maryland 
     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2023 12 26 5 95.252504  -56.814349
 Obj: 2023 12 26 5 155.270578  -72.899677
  • the object visibility at MMT, Mt. Hopkins, Arizona 
     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2023 12 26 5 93.785970  -51.655937
 Obj: 2023 12 26 5 142.107312  -68.841431
  • the object visibility at Hale Telescope, Palomar Mt., California 
     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2023 12 26 5 70.293458  -15.652916
 Obj: 2023 12 26 5 85.681870  -40.631607
  • the object visibility at Mauna Kea, Hawaii 
     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2023 12 26 5 90.602139  50.789409
 Obj: 2023 12 26 5 84.687621  22.821317
  • the object visibility at Siding Spring Obs., Australia 
     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2023 12 26 5 27.715867  26.792942
 Obj: 2023 12 26 5 56.348016  16.746680
  • the object visibility at Tokyo, Japan 
     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2023 12 26 5 277.771907  -39.408599
 Obj: 2023 12 26 5 282.105177  -11.344873
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain 
     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2023 12 26 5 356.076783  -36.210708
 Obj: 2023 12 26 5 321.331125  -34.146348
  • the object visibility at Gemini South, Cerro Pachon, Chile 
     
 
 
The data/results are in /local/data/bat1/prebascript/trigger1204595/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:
Tue Dec 26 00:39:42 EST 2023