TDRSS lightcurve for Trigger=1108208

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 27 May 22 22:26:07 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1108208,   Seg_Num: 0
GRB_RA:          244.983d {+16h 19m 56s} (J2000),
                 245.302d {+16h 21m 12s} (current),
                 244.272d {+16h 17m 05s} (1950)
GRB_DEC:         -15.656d {-15d 39' 22"} (J2000),
                 -15.709d {-15d 42' 30"} (current),
                 -15.537d {-15d 32' 12"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       44132 [cnts]    Image_Peak=1474 [image_cnts]
TRIGGER_DUR:     26.880 [sec] 
TRIGGER_INDEX:   423     E_range: 15-25 keV
BKG_INTEN:       91905 [cnts]
BKG_TIME:        80570.78 SOD {22:22:50.78} UT
BKG_DUR:         64 [sec]
GRB_DATE:        19726 TJD;   147 DOY;   22/05/27
GRB_TIME:        80677.92 SOD {22:24:37.92} UT
GRB_PHI:         101.80 [deg]
GRB_THETA:        17.71 [deg]
SOLN_STATUS:     0x10D
RATE_SIGNIF:     19.41 [sigma]
IMAGE_SIGNIF:    15.15 [sigma]
MERIT_PARAMS:     +0  +0 +100  +5  +0  +4  +0  +0 +99  +0 
SUN_POSTN:        64.76d {+04h 19m 03s}  +21.41d {+21d 24' 36"}
SUN_DIST:        174.28 [deg]   Sun_angle= 12.0 [hr] (West of Sun)
MOON_POSTN:       36.15d {+02h 24m 37s}  +13.00d {+13d 00' 07"}
MOON_DIST:       151.65 [deg]
MOON_ILLUM:      6 [%]
GAL_COORDS:      359.08, 23.77 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      245.84,  5.71 [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 matches a source in the on-board catalog: Num=28021=(null) (probably an AT_Slot).  
COMMENTS:        This matches a source in the ground catalog: Sco_X-1,   delta=0.017 [deg].  
COMMENTS:        This is not a GRB.  
COMMENTS:        This is an interesting source.

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 27 May 22 22:44:13 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1108208,   Seg_Num: 0
GRB_RA:          244.983d {+16h 19m 56s} (J2000),
                 245.302d {+16h 21m 12s} (current),
                 244.272d {+16h 17m 05s} (1950)
GRB_DEC:         -15.656d {-15d 39' 22"} (J2000),
                 -15.709d {-15d 42' 30"} (current),
                 -15.537d {-15d 32' 12"} (1950)
GRB_DATE:        19726 TJD;   147 DOY;   22/05/27
GRB_TIME:        80677.92 SOD {22:24:37.92} UT
TRIGGER_INDEX:   423
GRB_PHI:         101.80 [deg]
GRB_THETA:        17.71 [deg]
DELTA_TIME:      6.00 [sec]
TRIGGER_DUR:     26.880 [sec] 
SOLN_STATUS:     0x10D
RATE_SIGNIF:     19.41 [sigma]
IMAGE_SIGNIF:    15.15 [sigma]
LC_URL:          sw01108208000msb.lc

GCN template for BAT paragraph

  • Click here! 
    At 22:24:37 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 220527 ***A*** (trigger=1108208).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 244.983, -15.656 which is 
   RA(J2000) = 16h 19m 56s
   Dec(J2000) = -15d 39' 22"
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 ~1136 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

    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: 163.008 s +/- 2.90513 s
  Estimated T50 duration: 90.88 s +/- 2.90196 s
  Estimated Peak Interval: MET   675383258.30399990 +/- 0.500000 s
  Estimated background rate 1:     4053.203 near MET 675383089.600000 s
  Estimated background rate 2:     3850.159 near MET 675383284.928000 s
  Estimated total duration: 180.736 s (for data selection)
       (from MET 675383096.000000 to MET 675383276.736000)
  Estimated total fluence: 12439.249876 count
  Created GTI with 4 entries
------------------------------------------

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

    bat_grb_pos_cat.sh 244.983 -15.656 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 244.983 -15.656
Sco X-1 10003 244.979 -15.64 0.016455915961538784

    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 27 22 97.382562  25.914149
 Obj: 2022 5 27 22 271.920668  -23.119628
  • the object visibility at GSFC, Greenbelt, Maryland 
     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2022 5 27 22 83.461703  53.559696
 Obj: 2022 5 27 22 254.785055  -51.372476
  • the object visibility at MMT, Mt. Hopkins, Arizona 
     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2022 5 27 22 76.519364  58.243962
 Obj: 2022 5 27 22 247.220425  -55.602446
  • the object visibility at Hale Telescope, Palomar Mt., California 
     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2022 5 27 22 251.297802  84.818010
 Obj: 2022 5 27 22 125.735960  -83.092934
  • the object visibility at Mauna Kea, Hawaii 
     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2022 5 27 22 235.971048  11.458449
 Obj: 2022 5 27 22 60.818059  -14.784321
  • the object visibility at Siding Spring Obs., Australia 
     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2022 5 27 22 258.420445  21.959339
 Obj: 2022 5 27 22 83.368468  -18.659461
  • the object visibility at Tokyo, Japan 
     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2022 5 27 22 132.080929  -21.982869
 Obj: 2022 5 27 22 307.235926  25.551967
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain 
     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2022 5 27 22 113.790164  -1.988897
 Obj: 2022 5 27 22 289.232028  -1.562421
  • the object visibility at Gemini South, Cerro Pachon, Chile 
     
 
 
The data/results are in /local/data/bat1/prebascript/trigger1108208/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:
Fri May 27 18:45:42 EDT 2022