TDRSS lightcurve for Trigger=1100848
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Sat 02 Apr 22 03:54:57 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 1100848, Seg_Num: 0
GRB_RA: 30.692d {+02h 02m 46s} (J2000),
30.862d {+02h 03m 27s} (current),
30.312d {+02h 01m 15s} (1950)
GRB_DEC: -61.376d {-61d 22' 34"} (J2000),
-61.270d {-61d 16' 11"} (current),
-61.616d {-61d 36' 58"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 56 [cnts] Image_Peak=17 [image_cnts]
TRIGGER_DUR: 0.032 [sec]
TRIGGER_INDEX: 10305 E_range: 15-25 keV
BKG_INTEN: 10654 [cnts]
BKG_TIME: 14067.11 SOD {03:54:27.11} UT
BKG_DUR: 8 [sec]
GRB_DATE: 19671 TJD; 92 DOY; 22/04/02
GRB_TIME: 14082.47 SOD {03:54:42.47} UT
GRB_PHI: -14.84 [deg]
GRB_THETA: 31.92 [deg]
SOLN_STATUS: 0x83
RATE_SIGNIF: 6.32 [sigma]
IMAGE_SIGNIF: 6.83 [sigma]
MERIT_PARAMS: +1 +0 +0 -5 +0 -3 +0 +0 -37 +0
SUN_POSTN: 11.41d {+00h 45m 37s} +4.90d {+04d 53' 56"}
SUN_DIST: 67.87 [deg] Sun_angle= -1.3 [hr] (East of Sun)
MOON_POSTN: 22.27d {+01h 29m 05s} +6.67d {+06d 40' 18"}
MOON_DIST: 68.27 [deg]
MOON_ILLUM: 1 [%]
GAL_COORDS: 288.58,-53.72 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 343.14,-64.50 [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: Since the IMAGE_SIGNIF is less than 7 sigma, this is a questionable detection.
COMMENTS: This trigger occurred at longitude,latitude = 93.12,-12.78 [deg].
COMMENTS: This AT will self-cancel at the end of the first orbit (ie I_signif<7.0 && Trig_dur<65msec).
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Sat 02 Apr 22 04:01:52 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 1100848, Seg_Num: 0
GRB_RA: 30.692d {+02h 02m 46s} (J2000),
30.862d {+02h 03m 27s} (current),
30.312d {+02h 01m 15s} (1950)
GRB_DEC: -61.376d {-61d 22' 34"} (J2000),
-61.270d {-61d 16' 11"} (current),
-61.616d {-61d 36' 58"} (1950)
GRB_DATE: 19671 TJD; 92 DOY; 22/04/02
GRB_TIME: 14082.49 SOD {03:54:42.49} UT
TRIGGER_INDEX: 10305
GRB_PHI: -14.84 [deg]
GRB_THETA: 31.92 [deg]
DELTA_TIME: 62.00 [sec]
TRIGGER_DUR: 0.032 [sec]
SOLN_STATUS: 0x83
RATE_SIGNIF: 6.32 [sigma]
IMAGE_SIGNIF: 6.83 [sigma]
LC_URL: sw01100848000msb.lc
GCN template for BAT paragraph
Click here!
At 03:54:42 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 220402 ***A*** (trigger=1100848). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 30.692, -61.376 which is
RA(J2000) = 02h 02m 46s
Dec(J2000) = -61d 22' 34"
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 ~945 counts/sec (15-350 keV), at ~1 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 background rate 1: 4774.414 near MET 670564535.616000 s
Estimated background rate 2: 4864.502 near MET 670564640.576000 s
Estimated total fluence: 0.000000 count
Created GTI with 2 entries
------------------------------------------
Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)
bat_grb_pos_cat.sh 30.692 -61.376 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 30.692 -61.376
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 4 2 4 154.698981 -42.971163
Obj: 2022 4 2 4 33.641728 -57.932880
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2022 4 2 4 116.485808 -28.297043
Obj: 2022 4 2 4 34.384341 -36.094446
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2022 4 2 4 112.979550 -23.019812
Obj: 2022 4 2 4 34.780777 -34.600720
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2022 4 2 4 92.310878 8.089343
Obj: 2022 4 2 4 25.648486 -5.601073
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2022 4 2 4 138.973550 45.193818
Obj: 2022 4 2 4 7.772853 59.520079
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2022 4 2 4 21.584102 58.760636
Obj: 2022 4 2 4 355.943951 -5.954992
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2022 4 2 4 235.994949 -38.424582
Obj: 2022 4 2 4 342.520828 -54.567010
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2022 4 2 4 27.122956 -62.028788
Obj: 2022 4 2 4 14.755817 5.155284
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger1100848/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:
Sat Apr 2 00:03:46 EDT 2022