batgrbproduct analysis for trigger=1098630
batgrbproduct Analysis for Trigger=1098630
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): Tue Mar 22 15:58:36 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1098630/GCN5_download_cron
======================================================================
Trigger: 01098630 Segment: 000
BAT Trigger Time: 669571624 [s; MET]
Trigger Stop: 669571968 [s; MET]
UTC: 2022-03-21T16:06:35.178360 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 244.977177105144 Dec: -15.4356257497743 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.17
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 10.17
Flight Position: [ source = BAT ]
RA: 244.977177105144 Dec: -15.4356257497743 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 244.960810760047 Dec: -15.4409566752486 [deg; J2000]
{ 16h 19m 50.6s , -15d 26' 27.4" }
+/- 2.04197876147379 [arcmin] (estimated 90% radius based on SNR)
+/- 0.824199851979437 [arcmin] (formal 1-sigma fit error)
SNR: 10.9695311238224
Angular difference between Flight and Ground position is 0.999131 arcmin
Partial Coding Fraction: 0.06738281 [ including projection effects ]
Duration
T90: 843.728000044823 +/- 257.226407939216
Measured from: -95.7519998550415
to: 747.976000189781 [s; relative to TRIGTIME]
T50: 393.232000112534 +/- 155.163743883669
Measured from: 237.928000092506
to: 631.16000020504 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 527.179999947548
to: 528.179999947548 [s; relative to TRIGTIME]
Total Fluence
Measured from: -137.351999998093
to: 767.175999999046 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 31.518360 3.802044 0.087123 0.637452
0.736515 0.703987 0.612395 0.547552 [error]
Peak 0.077471 0.024995 0.042857 0.059889
0.026059 0.025249 0.020724 0.019783 [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 1.50e-05 2.10e-06 1.31e-07 8.72e-09 1.73e-05 1.73e-05 erg/cm2
Error 1.50e-06 3.87e-07 6.10e-08 7.04e-09 1.50e-06 1.50e-06 erg/cm2
Peak flux Power-law 1.19e+00 2.84e-01 3.50e-02 4.80e-03 1.51e+00 1.52e+00 ph/cm2/s
Error 6.09e-01 2.74e-01 7.30e-02 2.79e-02 7.51e-01 7.53e-01 ph/cm2/s
Fluence Cutoff-PL 1.49e-05 1.72e-06 1.26e-08 1.71e-12 1.66e-05 1.66e-05 erg/cm2
Error 1.58e-06 5.00e-07 5.70e-08 2.14e-09 1.62e-06 1.62e-06 erg/cm2
Peak flux Cutoff-PL 1.30e+00 2.61e-01 1.79e-02 3.36e-04 1.48e+00 1.50e+00 ph/cm2/s
Error 6.75e-01 2.78e-01 -------- 2.75e-02 7.15e-01 1.13e+00 ph/cm2/s
Fluence Band 1.38e-05 1.98e-06 5.43e-08 4.11e-10 1.58e-05 1.58e-05 erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 3.63e-01 5.21e-03 1.62e-05 5.02e-08 3.69e-01 3.69e-01 ph/cm2/s
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 5.997 0.407 - - 1.56e-04 5.89e-05 46.640 57
CPL 1.000 0.000 50.0 0.0 2.99e-03 0.00e+00 346.420 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 4.021 1.932 - - 2.41e-03 3.70e-03 46.560 57
CPL 1.000 0.000 50.0 0.0 1.82e-02 0.00e+00 53.150 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 904.528 -137.352 767.176
T90 843.728 -95.752 747.976
T50 393.232 237.928 631.160
Peak 1.000 527.180 528.180
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
244.9608 -15.4410 0.0175 50.6 29.1 30.9314 11.0 TRIG_01098630
------------------------------------------
Foreground time interval of the image:
-16.599 6.530 (delta_t = 23.129 [sec])
8.000 24.060 (delta_t = 16.060 [sec])
26.000 460.220 (delta_t = 434.220 [sec])
462.000 551.700 (delta_t = 89.700 [sec])
553.000 580.690 (delta_t = 27.690 [sec])
583.000 767.176 (delta_t = 184.176 [sec])
Background time interval of the image:
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
Multiple GTIs in the spectrum
tstart tstop
-137.352000 -39.810000
-39.000000 6.530000
8.000000 24.060000
26.000000 460.220000
462.000000 551.700000
553.000000 580.690000
583.000000 767.176000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.99701 ( -0.400634 0.412558 )
Norm@50keV : 1.56400E-04 ( -5.03168e-05 6.75013e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.64 using 59 PHA bins.
# Reduced chi-squared = 0.8182 for 57 degrees of freedom
# Null hypothesis probability = 8.347468e-01
Photon flux (15-150 keV) in 894.9 sec: 0.641698 ( -0.0605619 0.0610261 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.72501e-05 ( -1.50023e-06 1.50688e-06 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-137.352000 -39.810000
-39.000000 6.530000
8.000000 24.060000
26.000000 460.220000
462.000000 551.700000
553.000000 580.690000
583.000000 767.176000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.98506E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 346.42 using 59 PHA bins.
# Reduced chi-squared = 6.1860 for 56 degrees of freedom
# Null hypothesis probability = 1.794134e-43
Photon flux (15-150 keV) in 894.9 sec: 0.624035 ( -0.065847 0.064914 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.66354e-05 ( -1.63328e-06 1.6144e-06 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-137.352000 -39.810000
-39.000000 6.530000
8.000000 24.060000
26.000000 460.220000
462.000000 551.700000
553.000000 580.690000
583.000000 767.176000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -8.29580 ( 6.09961 8.2958 )
beta : -6.04881 ( -0.374193 0.444622 )
Epeak [keV] : 345.797 ( -345.797 -345.797 )
Norm@50keV : 2.02358E-02 ( -0.00620845 0.00986947 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.68 using 59 PHA bins.
# Reduced chi-squared = 0.8488 for 55 degrees of freedom
# Null hypothesis probability = 7.800687e-01
Photon flux (15-150 keV) in 894.9 sec: 0.675751 ( 6.32425 -0.113473 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.58143e-05 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 2.65388 (-0.197169 0.222689)
R^2/D10^2 : 194.779 (-90.7283 168.663)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.44 using 59 PHA bins.
# Reduced chi-squared = 0.8147 for 57 degrees of freedom
# Null hypothesis probability = 8.400163e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.460e-05 3.190e-06
25- 50 1.358e-06 3.126e-07
50-150 7.570e-10 5.268e-10
15-150 1.596e-05 3.137e-06
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.69784 (-0.504795 0.59938)
Norm : 179.882 (-71.265 121.006)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.483e-05 2.676e-06
25- 50 1.622e-06 3.853e-07
50-150 6.082e-09 3.852e-09
15-150 1.646e-05 2.470e-06
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.64922 (-0.20767 0.211607)
R1^2/D10^2 : 197.249 (-80.2036 176.726)
kT2 [keV] : 200.000 (-200 -200)
R2^2/D10^2 : 3.14563E-06 (-3.14564e-06 -3.14564e-06)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.457e-05 2.604e-06
25- 50 1.377e-06 3.147e-07
50-150 4.448e-07 5.685e-10
15-150 1.639e-05 3.584e-06
Peak spectrum fit
Power-law model
Time interval is from 527.180 sec. to 528.180 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.02147 ( -1.37452 2.49036 )
Norm@50keV : 2.40942E-03 ( -0.00240963 0.00499577 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.56 using 59 PHA bins.
# Reduced chi-squared = 0.8169 for 57 degrees of freedom
# Null hypothesis probability = 8.367404e-01
Photon flux (15-150 keV) in 1 sec: 1.51396 ( -0.749307 0.753405 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.39109e-08 ( -2.93911e-08 3.464e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 527.180 sec. to 528.180 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 1.82303E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.15 using 59 PHA bins.
# Reduced chi-squared = 0.9490 for 56 degrees of freedom
# Null hypothesis probability = 5.835798e-01
Photon flux (15-150 keV) in 1 sec: 1.48044 ( -0.720896 0.70948 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.64057e-08 ( -2.27133e-08 3.85346e-08 ) ergs/cm2
Band function
Time interval is from 527.180 sec. to 528.180 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.13049 ( 1.79519 1.79519 )
beta : -9.37167 ( 4.82885 5.42077 )
Epeak [keV] : 15.7902 ( -1.9951 11.1774 )
Norm@50keV : 1.24155E+04 ( -12416.3 5.05359e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.07 using 59 PHA bins.
# Reduced chi-squared = 0.8376 for 55 degrees of freedom
# Null hypothesis probability = 7.989796e-01
Photon flux (15-150 keV) in 1 sec: 0.368681 ( 6.63132 -0.368681 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.76716e-08 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 3.44927 (-1.28265 2.15034)
R^2/D10^2 : 90.8756 (-90.8756 1713.25)
(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 3.844e-08 2.345e-08
25- 50 8.900e-09 6.070e-09
50-150 4.118e-11 5.045e-11
15-150 4.738e-08 3.083e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.78418 (-4.20823 19.0631)
Norm : 91.0759 (-91.0759 995.303)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.708e-08 2.263e-08
25- 50 1.102e-08 7.215e-09
50-150 3.546e-10 4.982e-10
15-150 4.846e-08 3.040e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.26420 (-3.26465 2.09767)
R1^2/D10^2 : 117.763 (-117.087 -117.087)
kT2 [keV] : 15.0550 (-15.1092 -15.1092)
R2^2/D10^2 : 2.80141E-02 (-0.0276067 0.258359)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.783e-08 2.452e-08
25- 50 1.237e-08 8.245e-09
50-150 8.205e-09 1.045e-08
15-150 5.841e-08 3.263e-08
Plot creation:
Tue Mar 22 16:08:50 EDT 2022