batgrbproduct analysis for trigger=1101675
batgrbproduct Analysis for Trigger=1101675
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 Apr 9 10:51:44 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1101675/GCN5_download_cron
======================================================================
Trigger: 01101675 Segment: 000
BAT Trigger Time: 671089593.152 [s; MET]
Trigger Stop: 671089593.664 [s; MET]
UTC: 2022-04-08T05:46:04.227800 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 202.402022913259 Dec: 47.0613353293178 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 12.8
Image Trigger?: NO
Rate S/N Ratio: 28.5657137141714 [ if not an image trigger ]
Image S/N Ratio: 12.8
Flight Position: [ source = BAT ]
RA: 202.402022913259 Dec: 47.0613353293178 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 202.398633294394 Dec: 47.0653945692685 [deg; J2000]
{ 13h 29m 35.7s , +47d 03' 55.4" }
+/- 1.16077904237014 [arcmin] (estimated 90% radius based on SNR)
+/- 0.534894039960441 [arcmin] (formal 1-sigma fit error)
SNR: 24.5821016862189
Angular difference between Flight and Ground position is 0.280199 arcmin
Partial Coding Fraction: 0.3476562 [ including projection effects ]
Duration
T90: 17.2479999065399 +/- 1.10252795732478
Measured from: -0.0879998207092285
to: 17.1600000858307 [s; relative to TRIGTIME]
T50: 4.44799995422363 +/- 1.62315742591311
Measured from: 1.32000017166138
to: 5.76800012588501 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 2.4760000705719
to: 3.4760000705719 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.547999978065491
to: 18.2560000419617 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.859249 0.906430 0.448274 -0.042650
0.050206 0.051967 0.044436 0.039095 [error]
Peak 0.174315 0.240510 0.096874 -0.003570
0.014779 0.016161 0.012626 0.009357 [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 3.11e-07 3.89e-07 3.54e-07 5.61e-07 1.25e-06 1.61e-06 erg/cm2
Error 2.97e-08 2.68e-08 4.22e-08 1.30e-07 9.85e-08 1.79e-07 erg/cm2
Peak flux Power-law 2.28e+00 1.61e+00 7.46e-01 4.85e-01 4.86e+00 5.12e+00 ph/cm2/s
Error 2.61e-01 1.37e-01 9.91e-02 1.17e-01 4.17e-01 4.36e-01 ph/cm2/s
Fluence Cutoff-PL 2.86e-07 4.32e-07 3.36e-07 1.37e-07 1.15e-06 1.19e-06 erg/cm2
Error 3.33e-08 3.59e-08 5.09e-08 1.10e-07 1.06e-07 1.54e-07 erg/cm2
Peak flux Cutoff-PL 1.89e+00 2.02e+00 7.23e-01 6.22e-02 4.69e+00 4.70e+00 ph/cm2/s
Error 3.03e-01 2.06e-01 1.36e-01 5.57e-02 4.20e-01 4.23e-01 ph/cm2/s
Fluence Band 2.87e-07 4.24e-07 3.48e-07 1.86e-07 1.18e-06 1.25e-06 erg/cm2
Error 3.14e-08 3.54e-08 5.18e-08 -------- 1.12e-07 1.59e-07 erg/cm2
Peak flux Band 1.89e+00 2.02e+00 7.23e-01 6.25e-02 4.69e+00 4.70e+00 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 2.136 0.128 - - 7.11e-03 6.20e-04 72.770 57
CPL 1.192 0.567 35.3 8.8 2.50e-02 2.19e-02 62.400 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.107 0.141 - - 3.08e-02 3.21e-03 66.280 57
CPL 0.036 0.880 39.1 4.4 4.94e-01 9.17e-01 41.110 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: 3.136000 sec.
T50 in the 50-300 keV band: 2.304000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 18.804 -0.548 18.256
T90 17.248 -0.088 17.160
T50 4.448 1.320 5.768
Peak 1.000 2.476 3.476
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
202.3986 +47.0654 0.0078 37.1 147.0 1.9552 24.6 TRIG_01101675
------------------------------------------
Foreground time interval of the image:
-0.548 8.249 (delta_t = 8.797 [sec])
Background time interval of the image:
-51.051 -0.548 (delta_t = 50.503 [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 -0.548 sec. to 18.256 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.13623 ( -0.125371 0.130326 )
Norm@50keV : 7.10576E-03 ( -0.00062379 0.000615843 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.77 using 59 PHA bins.
# Reduced chi-squared = 1.277 for 57 degrees of freedom
# Null hypothesis probability = 7.769474e-02
Photon flux (15-150 keV) in 18.8 sec: 1.13834 ( -0.0784296 0.0784767 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.24589e-06 ( -9.78846e-08 9.90339e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.548 sec. to 18.256 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.19171 ( -0.606653 0.527653 )
Epeak [keV] : 35.3170 ( -10.6228 7.00401 )
Norm@50keV : 2.50229E-02 ( -0.0124644 0.0313305 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.40 using 59 PHA bins.
# Reduced chi-squared = 1.114 for 56 degrees of freedom
# Null hypothesis probability = 2.593892e-01
Photon flux (15-150 keV) in 18.8 sec: 1.09903 ( -0.08072 0.08086 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15121e-06 ( -1.04464e-07 1.08235e-07 ) ergs/cm2
Band function
Time interval is from -0.548 sec. to 18.256 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.19221 ( -0.319757 0.893731 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 35.3066 ( -10.6173 6.92825 )
Norm@50keV : 2.50043E-02 ( -0.012449 0.0313734 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.40 using 59 PHA bins.
# Reduced chi-squared = 1.134 for 55 degrees of freedom
# Null hypothesis probability = 2.300296e-01
Photon flux (15-150 keV) in 18.8 sec: 1.11707 ( 5.88293 -0.09278 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.17895e-06 ( -1.17882e-06 -1.40491e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.37813 (-0.764928 0.829878)
R^2/D10^2 : 0.664580 (-0.188732 0.265294)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 97.33 using 59 PHA bins.
# Reduced chi-squared = 1.708 for 57 degrees of freedom
# Null hypothesis probability = 6.984734e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.182e-07 2.630e-08
25- 50 4.940e-07 3.826e-08
50-150 2.135e-07 4.326e-08
15-150 9.257e-07 8.084e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 53.7674 (-9.10673 12.2221)
Norm : 6.22008 (-0.680565 0.828664)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.904e-07 2.688e-08
25- 50 4.277e-07 2.980e-08
50-150 4.440e-07 7.877e-08
15-150 1.162e-06 1.036e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.70544 (-0.951185 1.01569)
R1^2/D10^2 : 3.26241 (-1.45482 3.16755)
kT2 [keV] : 17.3104 (-3.11339 4.50297)
R2^2/D10^2 : 3.94786E-02 (-0.0250122 0.0556117)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.909e-07 8.042e-08
25- 50 4.216e-07 1.101e-07
50-150 4.514e-07 2.356e-07
15-150 1.164e-06 3.449e-07
Peak spectrum fit
Power-law model
Time interval is from 2.476 sec. to 3.476 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.10672 ( -0.137537 0.143876 )
Norm@50keV : 3.08153E-02 ( -0.0032288 0.00318751 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.28 using 59 PHA bins.
# Reduced chi-squared = 1.163 for 57 degrees of freedom
# Null hypothesis probability = 1.874543e-01
Photon flux (15-150 keV) in 1 sec: 4.86423 ( -0.416814 0.416959 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.86481e-07 ( -2.75641e-08 2.78308e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.476 sec. to 3.476 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.58676E-02 ( -0.962768 0.798108 )
Epeak [keV] : 39.0546 ( -4.29085 4.55228 )
Norm@50keV : 0.493513 ( -0.493594 1.33943 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.11 using 59 PHA bins.
# Reduced chi-squared = 0.7340 for 56 degrees of freedom
# Null hypothesis probability = 9.320743e-01
Photon flux (15-150 keV) in 1 sec: 4.69105 ( -0.41962 0.42032 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.58767e-07 ( -2.6565e-08 2.7764e-08 ) ergs/cm2
Band function
Time interval is from 2.476 sec. to 3.476 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -5.88691E-02 ( -0.772579 0.985354 )
beta : -9.37167 ( 9.37167 19.3713 )
Epeak [keV] : 39.1249 ( -4.13358 4.48389 )
Norm@50keV : 0.476905 ( -0.477012 6.04774 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.11 using 59 PHA bins.
# Reduced chi-squared = 0.7474 for 55 degrees of freedom
# Null hypothesis probability = 9.178737e-01
Photon flux (15-150 keV) in 1 sec: 4.69200 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.58698e-07 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.94775 (-0.799856 0.861478)
R^2/D10^2 : 2.48369 (-0.691683 0.956823)
(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 4.997e-08 6.980e-09
25- 50 1.233e-07 1.215e-08
50-150 6.339e-08 1.349e-08
15-150 2.367e-07 2.365e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 53.8042 (-8.87357 14.6093)
Norm : 27.4207 (-3.60236 3.68167)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.811e-08 6.740e-09
25- 50 1.003e-07 1.666e-08
50-150 1.042e-07 4.304e-08
15-150 2.726e-07 6.630e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.25893 (-2.96871 2.82328)
R1^2/D10^2 : 7.26993 (-4.18435 51.3119)
kT2 [keV] : 13.5690 (-3.06074 13.314)
R2^2/D10^2 : 0.489460 (-0.454103 1.33611)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.919e-08 3.106e-08
25- 50 1.125e-07 5.780e-08
50-150 8.675e-08 4.732e-08
15-150 2.585e-07 1.297e-07
Plot creation:
Sat Apr 9 11:01:53 EDT 2022