batgrbproduct analysis for trigger=1099310
batgrbproduct Analysis for Trigger=1099310
Analysis Summary
Notes:
- 1) No attempt has been made to eliminate the non-significant decimal places.
- 2) This batgrbproduct analysis is done of the amount of data for this trigger downloaded to date.
- 3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.
- 4) This page will be updated for up to 15 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.48
Process Start Time (local time): Sat Mar 26 20:13:47 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1099310/GCN5_download_cron
======================================================================
Trigger: 01099310 Segment: 000
BAT Trigger Time: 669921411.904 [s; MET]
Trigger Stop: 669921412.928 [s; MET]
UTC: 2022-03-25T17:16:23.058720 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 269.485349385526 Dec: -7.03074025444452 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.22
Image Trigger?: NO
Rate S/N Ratio: 15.8429795177549 [ if not an image trigger ]
Image S/N Ratio: 10.22
Flight Position: [ source = BAT ]
RA: 269.485349385526 Dec: -7.03074025444452 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 269.469482610202 Dec: -7.05509913870575 [deg; J2000]
{ 17h 57m 52.7s , -07d 03' 18.4" }
+/- 1.46639000438134 [arcmin] (estimated 90% radius based on SNR)
+/- 0.734184215274206 [arcmin] (formal 1-sigma fit error)
SNR: 17.6043139998535
Angular difference between Flight and Ground position is 1.740336 arcmin
Partial Coding Fraction: 0.5234375 [ including projection effects ]
Duration
T90: 3.50399994850159 +/- 0.557641507169291
Measured from: -0.751999974250793
to: 2.75199997425079 [s; relative to TRIGTIME]
T50: 1.37999987602234 +/- 0.404969178192553
Measured from: 0.28000009059906
to: 1.6599999666214 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.531999945640564
to: 1.53199994564056 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.972000002861023
to: 3.01599991321564 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.205373 0.261374 0.090435 0.029310
0.019214 0.019021 0.015574 0.012811 [error]
Peak 0.057287 0.110688 0.034743 0.012678
0.010048 0.010383 0.008756 0.006547 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
=== Fluence/Peak Flux Summary ===
Model Band1 Band2 Band3 Band4 Band5 Total
15-25 25-50 50-100 100-350 15-150 15-350 keV
Fluence Power-law 7.58e-08 9.92e-08 9.52e-08 1.63e-07 3.24e-07 4.33e-07 erg/cm2
Error 1.03e-08 9.47e-09 1.49e-08 4.99e-08 3.52e-08 6.67e-08 erg/cm2
Peak flux Power-law 8.11e-01 6.64e-01 3.69e-01 3.01e-01 1.98e+00 2.14e+00 ph/cm2/s
Error 1.62e-01 8.97e-02 7.13e-02 1.11e-01 2.69e-01 2.88e-01 ph/cm2/s
Fluence Cutoff-PL 6.72e-08 1.15e-07 8.77e-08 2.47e-08 2.90e-07 2.95e-07 erg/cm2
Error 1.22e-08 1.47e-08 2.03e-08 4.13e-08 4.00e-08 5.52e-08 erg/cm2
Peak flux Cutoff-PL 6.35e-01 8.37e-01 3.31e-01 2.55e-02 1.83e+00 1.83e+00 ph/cm2/s
Error 2.25e-01 1.69e-01 1.21e-01 8.59e-02 2.88e-01 3.14e-01 ph/cm2/s
Fluence Band 6.41e-08 1.18e-07 8.43e-08 6.69e-08 2.98e-07 3.35e-07 erg/cm2
Error 1.25e-08 -------- 1.80e-08 6.62e-08 3.79e-08 -------- erg/cm2
Peak flux Band -------- -------- -------- -------- -------- -------- ph/cm2/s
Error -------- -------- -------- -------- -------- -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.059 0.172 - - 8.78e-03 1.02e-03 69.800 57
CPL 0.686 1.126 39.3 8.9 5.49e-02 1.59e-01 63.150 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.849 0.227 - - 1.41e-02 2.13e-03 78.750 57
CPL -0.506 2.670 43.4 13.0 3.22e-01 1.72e+01 73.550 56
Model : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index : photon index: E^-{Ph_index} (minus sign is not included in the index)
Ph_90err : 90% error of the photon index
Epeak : Epeak in keV
Epeak_90err: 90% error of Epeak
Norm : normalization at 50 keV in PL model and at 1 keV in CPL model
Nomr_90err : 90% error of the normalization
chi2 : Chi-Squared
dof : degree of freedom
=== T90/T50 calculation in the 50-300 keV band (BATSE band) using 64 ms lc ===
T90 in the 50-300 keV band: 7.680000 sec.
T50 in the 50-300 keV band: 4.480000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 3.988 -0.972 3.016
T90 3.504 -0.752 2.752
T50 1.380 0.280 1.660
Peak 1.000 0.532 1.532
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
269.4695 -7.0551 0.0109 38.4 -25.4 0.5887 17.6 TRIG_01099310
------------------------------------------
Foreground time interval of the image:
-0.972 3.016 (delta_t = 3.988 [sec])
Background time interval of the image:
-239.904 -0.972 (delta_t = 238.932 [sec])
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) The mask-weighted light curves are using the flight position.
- 3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 4) For all the mask-weighted lightcurves, the y-axis units are counts/sec/det where a det is 0.4 x 0.4 = 0.16 sq cm.
- 5) The verticle lines correspond to following: green dotted lines are T50 interval, black dotted lines are T90 interval, blue solid line(s) is a spacecraft slew start time, and orange solid line(s) is a spacecraft slew end time.
- 6) Time of each bin is in the middle of the bin.
1 s binning
From T0-310 s to T0+310 s
From T100_start - 20 s to T100_end + 30 s
Full time interval
64 ms binning
Full time interval
From T100_start to T100_end
From T0-5 sec to T0+5 sec
16 ms binning
From T100_start-5 s to T100_start+5 s
8 ms binning
From T100_start-3 s to T100_start+3 s
2 ms binning
From T100_start-1 s to T100_start+1 s
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) For long bursts, a spectral fit of the pre-slew DRM will introduce some errors in both a spectral shape and a normalization if the PHA file contains a lot of the slew/post-slew time interval.
- 3) For fits to more complicated models (e.g. a power-law over a cutoff power-law), the BAT team has decided to require a chi-square improvement of more than 6 for each extra dof.
- 4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Time interval is from -0.972 sec. to 3.016 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.05935 ( -0.167867 0.176105 )
Norm@50keV : 8.78141E-03 ( -0.00102595 0.00100813 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.80 using 59 PHA bins.
# Reduced chi-squared = 1.225 for 57 degrees of freedom
# Null hypothesis probability = 1.188641e-01
Photon flux (15-150 keV) in 3.988 sec: 1.35447 ( -0.130819 0.130951 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.24217e-07 ( -3.49865e-08 3.5432e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.972 sec. to 3.016 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.685639 ( -1.29258 0.958917 )
Epeak [keV] : 39.2626 ( -9.19214 8.6075 )
Norm@50keV : 5.48726E-02 ( -0.0549269 0.262556 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.15 using 59 PHA bins.
# Reduced chi-squared = 1.128 for 56 degrees of freedom
# Null hypothesis probability = 2.383631e-01
Photon flux (15-150 keV) in 3.988 sec: 1.29042 ( -0.13905 0.13847 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.8968e-07 ( -3.84702e-08 4.14337e-08 ) ergs/cm2
Band function
Time interval is from -0.972 sec. to 3.016 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -7.16136E-02 ( -1.24478 1.92416 )
beta : -2.84276 ( 2.8456 0.548686 )
Epeak [keV] : 36.9654 ( -6.43631 6.65186 )
Norm@50keV : 0.135483 ( -0.138569 2.24584 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.10 using 59 PHA bins.
# Reduced chi-squared = 1.111 for 55 degrees of freedom
# Null hypothesis probability = 2.660448e-01
Photon flux (15-150 keV) in 3.988 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.97883e-07 ( -2.97855e-07 -3.76635e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.89260 (-0.900697 0.99761)
R^2/D10^2 : 0.671907 (-0.212387 0.30559)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.03 using 59 PHA bins.
# Reduced chi-squared = 1.229 for 57 degrees of freedom
# Null hypothesis probability = 1.152205e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.320e-08 9.491e-09
25- 50 1.303e-07 1.422e-08
50-150 6.589e-08 1.653e-08
15-150 2.494e-07 2.889e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 59.4693 (-13.7887 20.171)
Norm : 7.17315 (-1.09447 1.24494)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.179e-08 9.691e-09
25- 50 1.090e-07 1.190e-08
50-150 1.231e-07 2.939e-08
15-150 3.038e-07 3.753e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.77034 (-1.64803 1.2362)
R1^2/D10^2 : 0.978089 (-0.364484 0.744504)
kT2 [keV] : 46.1905 (-39.0699 -46.1899)
R2^2/D10^2 : 1.03366E-03 (-0.000963965 0.0386494)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.567e-08 2.485e-08
25- 50 1.202e-07 3.912e-08
50-150 7.995e-08 2.666e-08
15-150 2.658e-07 8.120e-08
Peak spectrum fit
Power-law model
Time interval is from 0.532 sec. to 1.532 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.84903 ( -0.221559 0.232956 )
Norm@50keV : 1.40734E-02 ( -0.00214714 0.00210686 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.75 using 59 PHA bins.
# Reduced chi-squared = 1.382 for 57 degrees of freedom
# Null hypothesis probability = 2.976601e-02
Photon flux (15-150 keV) in 1 sec: 1.97737 ( -0.268437 0.268734 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.29405e-07 ( -1.95634e-08 1.98465e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.532 sec. to 1.532 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.506048 ( -3.43349 1.90726 )
Epeak [keV] : 43.4338 ( -6.30498 19.6046 )
Norm@50keV : 0.322455 ( -0.342356 34.1015 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.55 using 59 PHA bins.
# Reduced chi-squared = 1.313 for 56 degrees of freedom
# Null hypothesis probability = 5.787321e-02
Photon flux (15-150 keV) in 1 sec: 1.82691 ( -0.27197 0.30323 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.06458e-07 ( -2.13367e-08 2.6841e-08 ) ergs/cm2
Band function
Time interval is from 0.532 sec. to 1.532 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.61508 ( -2.1456 -1.64239 )
beta : -2.81530 ( -1.876 0.655191 )
Epeak [keV] : 39.5484 ( -6.09109 8.73473 )
Norm@50keV : 1.64419 ( -1.89461 90.5033 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.95 using 59 PHA bins.
# Reduced chi-squared = 1.272 for 55 degrees of freedom
# Null hypothesis probability = 8.445143e-02
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.16121e-07 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.6728 (-1.24988 1.46385)
R^2/D10^2 : 0.777043 (-0.304852 0.472957)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.837e-08 4.440e-09
25- 50 4.994e-08 9.055e-09
50-150 3.138e-08 9.790e-09
15-150 9.969e-08 1.965e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 83.6197 (-28.0524 57.7868)
Norm : 9.30264 (-1.70309 2.12509)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.420e-08 4.700e-09
25- 50 4.026e-08 6.345e-09
50-150 5.852e-08 3.191e-08
15-150 1.230e-07 3.039e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 200.000 (-200 -200)
R1^2/D10^2 : 1.22813E-04 (-7.02632e-05 0.000550453)
kT2 [keV] : 9.77463 (-1.03078 1.37702)
R2^2/D10^2 : 1.01565 (-0.40345 0.336548)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.187e-08 8.760e+01
25- 50 4.934e-08 7.595e+02
50-150 2.116e-08 1.226e+04
15-150 9.237e-08 1.470e+04
Plot creation:
Sat Mar 26 20:21:18 EDT 2022