batgrbproduct analysis for trigger=1095288
batgrbproduct Analysis for Trigger=1095288
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): Mon Mar 7 17:08:26 EST 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1095288/GCN5_download_cron
======================================================================
Trigger: 01095288 Segment: 000
BAT Trigger Time: 668283366.208 [s; MET]
Trigger Stop: 668283366.72 [s; MET]
UTC: 2022-03-06T18:15:37.473400 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 5.3780511855963 Dec: 71.3538978453536 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 12.05
Image Trigger?: NO
Rate S/N Ratio: 22.781571499789 [ if not an image trigger ]
Image S/N Ratio: 12.05
Flight Position: [ source = BAT ]
RA: 5.3780511855963 Dec: 71.3538978453536 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 5.38038762531335 Dec: 71.3844703823195 [deg; J2000]
{ 00h 21m 31.3s , +71d 23' 04.1" }
+/- 1.55491029355369 [arcmin] (estimated 90% radius based on SNR)
+/- 0.714227090115034 [arcmin] (formal 1-sigma fit error)
SNR: 16.1902520736735
Angular difference between Flight and Ground position is 1.834899 arcmin
Partial Coding Fraction: 0.7890625 [ including projection effects ]
Duration
T90: 12.336000084877 +/- 3.2357997965706
Measured from: -1.57599985599518
to: 10.7600002288818 [s; relative to TRIGTIME]
T50: 3.44000005722046 +/- 2.58453242800887
Measured from: -0.135999798774719
to: 3.30400025844574 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.0519999265670776
to: 0.948000073432922 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.81599998474121
to: 11.6560000181198 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.234382 0.307786 0.284181 0.076090
0.033137 0.034692 0.030991 0.027040 [error]
Peak 0.067011 0.099317 0.098836 0.038606
0.010077 0.011091 0.010295 0.008001 [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 6.41e-08 1.33e-07 2.16e-07 7.86e-07 5.97e-07 1.20e-06 erg/cm2
Error 1.30e-08 1.59e-08 3.03e-08 2.48e-07 7.49e-08 2.69e-07 erg/cm2
Peak flux Power-law 6.10e-01 7.40e-01 6.50e-01 9.81e-01 2.34e+00 2.98e+00 ph/cm2/s
Error 1.22e-01 9.01e-02 8.12e-02 2.61e-01 2.52e-01 3.41e-01 ph/cm2/s
Fluence Cutoff-PL 6.42e-08 1.33e-07 2.16e-07 7.77e-07 5.96e-07 1.19e-06 erg/cm2
Error 1.01e-08 1.64e-08 3.02e-08 4.91e-07 7.65e-08 4.62e-07 erg/cm2
Peak flux Cutoff-PL 5.88e-01 7.50e-01 6.63e-01 8.08e-01 2.33e+00 2.81e+00 ph/cm2/s
Error 1.46e-01 1.00e-01 9.51e-02 4.29e-01 2.59e-01 5.04e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- 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 1.302 0.200 - - 4.49e-03 4.93e-04 69.090 57
CPL 1.298 0.420 10000.0 0.0 4.50e-03 0.00e+00 69.100 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.187 0.185 - - 2.00e-02 2.11e-03 56.320 57
CPL 1.015 0.574 310.9 0.0 2.41e-02 2.07e-02 56.150 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: 2.752000 sec.
T50 in the 50-300 keV band: 1.344000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 13.472 -1.816 11.656
T90 12.336 -1.576 10.760
T50 3.440 -0.136 3.304
Peak 1.000 -0.052 0.948
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
5.3804 +71.3845 0.0119 18.3 124.8 1.0412 16.2 TRIG_01095288
------------------------------------------
Foreground time interval of the image:
-1.816 11.656 (delta_t = 13.472 [sec])
Background time interval of the image:
-232.807 -1.816 (delta_t = 230.991 [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 -1.816 sec. to 11.656 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.30169 ( -0.20039 0.199035 )
Norm@50keV : 4.48523E-03 ( -0.000493573 0.000492504 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.09 using 59 PHA bins.
# Reduced chi-squared = 1.212 for 57 degrees of freedom
# Null hypothesis probability = 1.308733e-01
Photon flux (15-150 keV) in 13.47 sec: 0.535269 ( -0.0595305 0.0596282 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.96774e-07 ( -7.45005e-08 7.5354e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.816 sec. to 11.656 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.29817 ( -0.60179 0.239026 )
Epeak [keV] : 1.00000E+04 ( -10000 -10000 )
Norm@50keV : 4.50382E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.10 using 59 PHA bins.
# Reduced chi-squared = 1.234 for 56 degrees of freedom
# Null hypothesis probability = 1.123301e-01
Photon flux (15-150 keV) in 13.47 sec: 0.535131 ( -0.059443 0.059544 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.96341e-07 ( -7.8095e-08 7.4939e-08 ) ergs/cm2
Band function
Time interval is from -1.816 sec. to 11.656 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.45038 ( -4.45038 -4.45038 )
beta : -1.31921 ( -0.211196 0.207267 )
Epeak [keV] : 20.8203 ( -20.8203 7.7584 )
Norm@50keV : 430.322 ( -46.8822 1.66962e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.94 using 59 PHA bins.
# Reduced chi-squared = 1.253 for 55 degrees of freedom
# Null hypothesis probability = 9.791678e-02
Photon flux (15-150 keV) in 13.47 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 17.0402 (-2.46729 3.04989)
R^2/D10^2 : 3.98989E-02 (-0.0168732 0.0278881)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 91.00 using 59 PHA bins.
# Reduced chi-squared = 1.596 for 57 degrees of freedom
# Null hypothesis probability = 2.821225e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.176e-08 7.314e-09
25- 50 1.408e-07 2.475e-08
50-150 2.921e-07 6.998e-08
15-150 4.647e-07 7.866e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-41.542 -200)
Norm : 2.19981 (-0.242487 0.242487)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.379e-08 4.133e-08
25- 50 1.419e-07 7.705e-08
50-150 3.113e-07 1.697e-07
15-150 5.270e-07 2.898e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.72629 (-2.20406 7.10213)
R1^2/D10^2 : 0.986247 (-0.878173 6.29821)
kT2 [keV] : 26.1986 (-6.78099 -26.3322)
R2^2/D10^2 : 8.38754E-03 (-0.00797819 0.01481)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.709e-08 3.500e-08
25- 50 1.248e-07 4.886e-08
50-150 3.886e-07 1.990e-07
15-150 5.805e-07 2.295e-07
Peak spectrum fit
Power-law model
Time interval is from -0.052 sec. to 0.948 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.18679 ( -0.185696 0.184147 )
Norm@50keV : 1.99986E-02 ( -0.00211213 0.00211121 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.32 using 59 PHA bins.
# Reduced chi-squared = 0.9880 for 57 degrees of freedom
# Null hypothesis probability = 5.006014e-01
Photon flux (15-150 keV) in 1 sec: 2.34316 ( -0.251626 0.251969 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.03659e-07 ( -2.43293e-08 2.45278e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.052 sec. to 0.948 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.01497 ( -0.809081 0.338084 )
Epeak [keV] : 310.859 ( -310.858 -310.858 )
Norm@50keV : 2.41397E-02 ( -0.00892245 0.0324476 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.15 using 59 PHA bins.
# Reduced chi-squared = 1.003 for 56 degrees of freedom
# Null hypothesis probability = 4.692441e-01
Photon flux (15-150 keV) in 1 sec: 2.32799 ( -0.25997 0.25882 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.01773e-07 ( -2.6098e-08 2.5747e-08 ) ergs/cm2
Band function
Time interval is from -0.052 sec. to 0.948 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.906844 ( 0.953932 0.953932 )
beta : -1.33990 ( 1.3444 0.335208 )
Epeak [keV] : 196.916 ( -204.303 -204.303 )
Norm@50keV : 2.75499E-02 ( -0.00904349 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.09 using 59 PHA bins.
# Reduced chi-squared = 1.020 for 55 degrees of freedom
# Null hypothesis probability = 4.338777e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 18.8871 (-2.48951 3.00389)
R^2/D10^2 : 0.131187 (-0.0501137 0.0774113)
(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 9.218e-09 1.978e-09
25- 50 4.415e-08 7.445e-09
50-150 1.156e-07 2.356e-08
15-150 1.690e-07 2.570e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-29.8713 -200)
Norm : 9.57115 (-1.03216 1.03216)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.384e-08 1.307e-08
25- 50 4.585e-08 2.501e-08
50-150 1.006e-07 5.565e-08
15-150 1.703e-07 9.315e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.56879 (-2.00003 7.02029)
R1^2/D10^2 : 8.15390 (-7.66619 138.705)
kT2 [keV] : 23.6696 (-4.2461 30.5339)
R2^2/D10^2 : 5.78972E-02 (-0.0538701 0.0398334)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.942e-08 8.908e-09
25- 50 3.903e-08 1.006e-08
50-150 1.337e-07 3.372e-08
15-150 1.921e-07 5.266e-08
Plot creation:
Mon Mar 7 17:14:08 EST 2022