TDRSS lightcurve for Trigger=1038247

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 23 Mar 21 22:02:36 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1038247,   Seg_Num: 0
GRB_RA:          317.952d {+21h 11m 49s} (J2000),
                 318.187d {+21h 12m 45s} (current),
                 317.400d {+21h 09m 36s} (1950)
GRB_DEC:         +25.378d {+25d 22' 40"} (J2000),
                 +25.466d {+25d 27' 57"} (current),
                 +25.172d {+25d 10' 19"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       586 [cnts]    Image_Peak=97 [image_cnts]
TRIGGER_DUR:     0.064 [sec] 
TRIGGER_INDEX:   10418     E_range: 25-100 keV
BKG_INTEN:       14763 [cnts]
BKG_TIME:        79325.28 SOD {22:02:05.28} UT
BKG_DUR:         8 [sec]
GRB_DATE:        19296 TJD;    82 DOY;   21/03/23
GRB_TIME:        79338.40 SOD {22:02:18.40} UT
GRB_PHI:         -22.43 [deg]
GRB_THETA:        30.28 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     41.17 [sigma]
IMAGE_SIGNIF:    11.41 [sigma]
MERIT_PARAMS:     +1  +0  +0  -4  +2  +1  +0  +0 -64  +0 
SUN_POSTN:         3.21d {+00h 12m 50s}   +1.39d {+01d 23' 21"}
SUN_DIST:         49.58 [deg]   Sun_angle= 3.0 [hr] (West of Sun)
MOON_POSTN:      123.06d {+08h 12m 13s}  +23.76d {+23d 45' 27"}
MOON_DIST:       128.64 [deg]
MOON_ILLUM:      72 [%]
GAL_COORDS:       72.84,-15.48 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      330.17, 39.34 [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 = 153.03,20.01 [deg].

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 23 Mar 21 22:20:18 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1038247,   Seg_Num: 0
GRB_RA:          317.952d {+21h 11m 49s} (J2000),
                 318.187d {+21h 12m 45s} (current),
                 317.400d {+21h 09m 36s} (1950)
GRB_DEC:         +25.378d {+25d 22' 40"} (J2000),
                 +25.466d {+25d 27' 57"} (current),
                 +25.172d {+25d 10' 19"} (1950)
GRB_DATE:        19296 TJD;    82 DOY;   21/03/23
GRB_TIME:        79338.46 SOD {22:02:18.46} UT
TRIGGER_INDEX:   10418
GRB_PHI:         -22.43 [deg]
GRB_THETA:        30.28 [deg]
DELTA_TIME:      -38.00 [sec]
TRIGGER_DUR:     0.064 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     41.17 [sigma]
IMAGE_SIGNIF:    11.41 [sigma]
LC_URL:          sw01038247000msb.lc

GCN template for BAT paragraph

  • Click here! 
    At 22:02:18 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 210323 ***A*** (trigger=1038247).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 317.952, +25.378 which is 
   RA(J2000) = 21h 11m 49s
   Dec(J2000) = +25d 22' 40"
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 ~10085 counts/sec (15-350 keV), at ~0 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: 0.768 s +/- 0.256 s
  Estimated T50 duration: 0.256 s +/- 0.128 s
  Estimated Peak Interval: MET   638229765.56800008 +/- 0.500000 s
  Estimated background rate 1:     3748.725 near MET 638229752.960000 s
  Estimated background rate 2:     3748.400 near MET 638229858.560000 s
  Estimated total duration: 1.28 s (for data selection)
       (from MET 638229765.120000 to MET 638229766.400000)
  Estimated total fluence: 2748.850629 count
  Created GTI with 6 entries
------------------------------------------

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

    bat_grb_pos_cat.sh 317.952 25.378 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 317.952 25.378
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 3 23 22 78.885496  15.505362
 Obj: 2021 3 23 22 125.736136  -2.183712
  • the object visibility at GSFC, Greenbelt, Maryland 
     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2021 3 23 22 56.490241  43.757575
 Obj: 2021 3 23 22 108.562332  19.365046
  • the object visibility at MMT, Mt. Hopkins, Arizona 
     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2021 3 23 22 48.839495  46.763949
 Obj: 2021 3 23 22 105.293014  24.677297
  • the object visibility at Hale Telescope, Palomar Mt., California 
     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2021 3 23 22 337.234046  70.116767
 Obj: 2021 3 23 22 106.368676  55.064483
  • the object visibility at Mauna Kea, Hawaii 
     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2021 3 23 22 253.954891  21.983383
 Obj: 2021 3 23 22 198.935941  30.664739
  • the object visibility at Siding Spring Obs., Australia 
     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2021 3 23 22 274.737490  9.287410
 Obj: 2021 3 23 22 277.225479  58.847353
  • the object visibility at Tokyo, Japan 
     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2021 3 23 22 113.353904  -33.531532
 Obj: 2021 3 23 22 174.500307  -35.602445
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain 
     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2021 3 23 22 97.905001  10.505834
 Obj: 2021 3 23 22 99.617502  -39.039950
  • the object visibility at Gemini South, Cerro Pachon, Chile 
     
 
 
The data/results are in /local/data/bat1/prebascript/trigger1038247/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 Mar 23 18:21:03 EDT 2021