TDRSS lightcurve for Trigger=1108538

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 30 May 22 20:32:38 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1108538,   Seg_Num: 0
GRB_RA:          293.714d {+19h 34m 51s} (J2000),
                 293.955d {+19h 35m 49s} (current),
                 293.176d {+19h 32m 42s} (1950)
GRB_DEC:         +21.901d {+21d 54' 04"} (J2000),
                 +21.952d {+21d 57' 06"} (current),
                 +21.790d {+21d 47' 26"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       3695 [cnts]    Image_Peak=969 [image_cnts]
TRIGGER_DUR:     0.016 [sec] 
TRIGGER_INDEX:   10209     E_range: 15-50 keV
BKG_INTEN:       17820 [cnts]
BKG_TIME:        73930.76 SOD {20:32:10.76} UT
BKG_DUR:         8 [sec]
GRB_DATE:        19729 TJD;   150 DOY;   22/05/30
GRB_TIME:        73946.44 SOD {20:32:26.44} UT
GRB_PHI:         -122.60 [deg]
GRB_THETA:        17.53 [deg]
SOLN_STATUS:     0x10D
RATE_SIGNIF:     255.99 [sigma]
IMAGE_SIGNIF:    22.93 [sigma]
MERIT_PARAMS:     +0  +0  +2  -6  +1  +8  +0  +1 +45  +0 
SUN_POSTN:        67.74d {+04h 30m 57s}  +21.86d {+21d 51' 32"}
SUN_DIST:        117.16 [deg]   Sun_angle= 8.9 [hr] (West of Sun)
MOON_POSTN:       71.77d {+04h 47m 04s}  +24.34d {+24d 20' 34"}
MOON_DIST:       118.17 [deg]
MOON_ILLUM:      0 [%]
GAL_COORDS:       57.24,  0.84 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      300.60, 42.85 [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 matches a source in the on-board catalog: Num=10762=sgr1935p2154,   delta=0.017 [deg].  
COMMENTS:        This matches a source in the ground catalog: sgr1935p2154,   delta=0.017 [deg].  
COMMENTS:        This is not a GRB.  
COMMENTS:        This is an interesting source.  
COMMENTS:        This trigger occurred at longitude,latitude = 107.76,-16.21 [deg].

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 30 May 22 20:49:40 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1108538,   Seg_Num: 0
GRB_RA:          293.714d {+19h 34m 51s} (J2000),
                 293.955d {+19h 35m 49s} (current),
                 293.176d {+19h 32m 42s} (1950)
GRB_DEC:         +21.901d {+21d 54' 04"} (J2000),
                 +21.952d {+21d 57' 06"} (current),
                 +21.790d {+21d 47' 26"} (1950)
GRB_DATE:        19729 TJD;   150 DOY;   22/05/30
GRB_TIME:        73946.64 SOD {20:32:26.64} UT
TRIGGER_INDEX:   10209
GRB_PHI:         -122.60 [deg]
GRB_THETA:        17.53 [deg]
DELTA_TIME:      12.00 [sec]
TRIGGER_DUR:     0.016 [sec] 
SOLN_STATUS:     0x10D
RATE_SIGNIF:     255.99 [sigma]
IMAGE_SIGNIF:    22.93 [sigma]
LC_URL:          sw01108538000msb.lc

GCN template for BAT paragraph

  • Click here! 
    At 20:32:26 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 220530 ***A*** (trigger=1108538).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 293.714, +21.901 which is 
   RA(J2000) = 19h 34m 51s
   Dec(J2000) = +21d 54' 04"
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 ~57156 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: 161.536 s +/- 2.89772 s
  Estimated T50 duration: 120.448 s +/- 2.89772 s
  Estimated Peak Interval: MET   675635576.12800002 +/- 0.500000 s
  Estimated background rate 1:     3885.346 near MET 675635563.840000 s
  Estimated background rate 2:     3798.523 near MET 675635753.728000 s
  Estimated total duration: 169.856 s (for data selection)
       (from MET 675635575.680000 to MET 675635745.536000)
  Estimated total fluence: 26725.754363 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 293.714 21.901 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 293.714 21.901
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: 2022 5 30 20 77.900582  49.438973
 Obj: 2022 5 30 20 176.799019  -29.011676
  • the object visibility at GSFC, Greenbelt, Maryland 
     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2022 5 30 20 42.144945  77.192186
 Obj: 2022 5 30 20 141.699715  -25.742223
  • the object visibility at MMT, Mt. Hopkins, Arizona 
     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2022 5 30 20 14.787611  78.155546
 Obj: 2022 5 30 20 137.285841  -21.199507
  • the object visibility at Hale Telescope, Palomar Mt., California 
     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2022 5 30 20 260.121305  56.938966
 Obj: 2022 5 30 20 113.428522  -0.069436
  • the object visibility at Mauna Kea, Hawaii 
     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2022 5 30 20 251.456386  -11.861522
 Obj: 2022 5 30 20 136.774052  22.685186
  • the object visibility at Siding Spring Obs., Australia 
     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2022 5 30 20 242.314761  -1.135419
 Obj: 2022 5 30 20 68.578129  63.773370
  • the object visibility at Tokyo, Japan 
     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2022 5 30 20 114.897830  0.362979
 Obj: 2022 5 30 20 233.093488  -16.003461
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain 
     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2022 5 30 20 131.839906  19.607741
 Obj: 2022 5 30 20 342.203146  -81.232121
  • the object visibility at Gemini South, Cerro Pachon, Chile 
     
 
 
The data/results are in /local/data/bat1/prebascript/trigger1108538/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 May 30 16:50:02 EDT 2022