batgrbproduct Analysis for Trigger=650141
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 10 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Fri Jul 24 23:53:10 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger650141/GCN5_download_cron
======================================================================
Trigger: 00650141 Segment: 000
BAT Trigger Time: 459409610.88 [s; MET]
Trigger Stop: 459409612.928 [s; MET]
UTC: 2015-07-24T05:46:35.984180 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 97.5395976716236 Dec: -19.1535017233648 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.19
Image Trigger?: NO
Rate S/N Ratio: 9.64365076099295 [ if not an image trigger ]
Image S/N Ratio: 7.19
Flight Position: [ source = BAT ]
RA: 97.5395976716236 Dec: -19.1535017233648 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 97.5487896210137 Dec: -19.1467265507968 [deg; J2000]
{ 06h 30m 11.7s , -19d 08' 48.2" }
+/- 1.88126011038624 [arcmin] (estimated 90% radius based on SNR)
+/- 0.915613972165484 [arcmin] (formal 1-sigma fit error)
SNR: 12.3324282841066
Angular difference between Flight and Ground position is 0.660824 arcmin
Partial Coding Fraction: 0.484375 [ including projection effects ]
Duration
T90: 279.991999983788 +/- 43.9465167494662
Measured from: 1.26000010967255
to: 281.25200009346 [s; relative to TRIGTIME]
T50: 199.879999935627 +/- 5.4221176954706
Measured from: 24.9120001196861
to: 224.792000055313 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 24.0839999914169
to: 25.0839999914169 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.07199996709824
to: 325.420000016689 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.434835 1.660591 0.689246 0.266549
0.101306 0.103674 0.087202 0.072775 [error]
Peak 0.028709 0.046741 0.029401 0.009536
0.008180 0.008691 0.007239 0.005911 [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 5.26e-07 6.89e-07 6.61e-07 1.13e-06 2.25e-06 3.00e-06 erg/cm2
Error 5.92e-08 5.27e-08 8.59e-08 2.91e-07 1.98e-07 3.83e-07 erg/cm2
Peak flux Power-law 3.42e-01 3.17e-01 2.04e-01 2.02e-01 9.47e-01 1.07e+00 ph/cm2/s
Error 1.21e-01 7.32e-02 5.83e-02 1.14e-01 2.14e-01 2.37e-01 ph/cm2/s
Fluence Cutoff-PL 4.98e-07 7.38e-07 6.42e-07 4.17e-07 2.12e-06 2.30e-06 erg/cm2
Error 6.79e-08 7.59e-08 1.00e-07 4.92e-07 2.40e-07 6.07e-07 erg/cm2
Peak flux Cutoff-PL 3.12e-01 3.41e-01 2.15e-01 1.02e-01 9.32e-01 9.71e-01 ph/cm2/s
Error 1.37e-01 9.37e-02 6.67e-02 1.23e-01 2.17e-01 2.66e-01 ph/cm2/s
Fluence Band 4.78e-07 7.58e-07 6.15e-07 7.33e-07 2.14e-06 2.59e-06 erg/cm2
Error -------- -------- 9.85e-08 -------- 2.17e-07 -------- erg/cm2
Peak flux Band 3.13e-01 3.41e-01 2.15e-01 1.04e-01 9.33e-01 9.74e-01 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 2.060 0.146 - - 7.45e-04 7.02e-05 69.440 57
CPL 1.461 0.730 37.7 0.0 1.64e-03 0.00e+00 67.110 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.636 0.368 - - 7.29e-03 1.68e-03 53.660 57
CPL 1.008 1.434 75.9 0.0 1.57e-02 0.00e+00 53.110 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: 271.360000 sec.
T50 in the 50-300 keV band: 191.552000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 326.492 -1.072 325.420
T90 279.992 1.260 281.252
T50 199.880 24.912 224.792
Peak 1.000 24.084 25.084
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
97.5488 -19.1467 0.0156 37.5 -139.7 1.0714 12.3 TRIG_00650141
------------------------------------------
Foreground time interval of the image:
-1.072 27.021 (delta_t = 28.093 [sec])
Background time interval of the image:
-156.479 -1.072 (delta_t = 155.407 [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 -1.072 sec. to 325.420 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.05998 ( -0.1429 0.148502 )
Norm@50keV : 7.44525E-04 ( -7.08149e-05 6.96286e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.44 using 59 PHA bins.
# Reduced chi-squared = 1.218 for 57 degrees of freedom
# Null hypothesis probability = 1.247896e-01
Photon flux (15-150 keV) in 326.5 sec: 0.114873 ( -0.00892588 0.00893491 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.25059e-06 ( -1.96919e-07 1.99188e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.072 sec. to 325.420 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.46055 ( -0.800605 0.65908 )
Epeak [keV] : 37.6536 ( )
Norm@50keV : 1.64422E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.11 using 59 PHA bins.
# Reduced chi-squared = 1.198 for 56 degrees of freedom
# Null hypothesis probability = 1.470452e-01
Photon flux (15-150 keV) in 326.5 sec: 0.111937 ( -0.009533 0.009487 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.12185e-06 ( -2.36017e-07 2.4383e-07 ) ergs/cm2
Band function
Time interval is from -1.072 sec. to 325.420 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.937952 ( -0.997623 2.19879 )
beta : -2.41785 ( 2.44341 0.364139 )
Epeak [keV] : 34.8051 ( -9.36847 10.8807 )
Norm@50keV : 3.61586E-03 ( -0.00423856 0.163903 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.23 using 59 PHA bins.
# Reduced chi-squared = 1.186 for 55 degrees of freedom
# Null hypothesis probability = 1.626237e-01
Photon flux (15-150 keV) in 326.5 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.13983e-06 ( -2.13755e-06 -2.15944e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.78359 (-0.813108 0.892462)
R^2/D10^2 : 5.72901E-02 (-0.0166616 0.0233024)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 91.51 using 59 PHA bins.
# Reduced chi-squared = 1.605 for 57 degrees of freedom
# Null hypothesis probability = 2.527864e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.618e-07 4.414e-08
25- 50 8.719e-07 7.346e-08
50-150 4.270e-07 8.603e-08
15-150 1.661e-06 1.490e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 60.7572 (-12.4964 17.3942)
Norm : 0.595145 (-0.0768956 0.0848749)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.14 using 59 PHA bins.
# Reduced chi-squared = 1.178 for 57 degrees of freedom
# Null hypothesis probability = 1.684136e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.894e-07 5.436e-08
25- 50 7.476e-07 5.616e-08
50-150 8.595e-07 1.659e-07
15-150 2.097e-06 2.096e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.37244 (-2.30584 1.62779)
R1^2/D10^2 : 0.139273 (-0.0572139 0.218528)
kT2 [keV] : 26.1643 (-16.5271 -32.0111)
R2^2/D10^2 : 6.85298E-04 (-0.000317656 0.00619278)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.50 using 59 PHA bins.
# Reduced chi-squared = 1.245 for 55 degrees of freedom
# Null hypothesis probability = 1.043197e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.436e-07 1.099e-07
25- 50 7.818e-07 2.062e-07
50-150 8.844e-07 4.376e-07
15-150 2.110e-06 6.974e-07
Peak spectrum fit
Power-law model
Time interval is from 24.084 sec. to 25.084 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.63625 ( -0.361837 0.373817 )
Norm@50keV : 7.28558E-03 ( -0.00169824 0.00167069 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.66 using 59 PHA bins.
# Reduced chi-squared = 0.9415 for 57 degrees of freedom
# Null hypothesis probability = 6.009716e-01
Photon flux (15-150 keV) in 1 sec: 0.947054 ( -0.213791 0.214306 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.78545e-08 ( -1.6442e-08 1.66801e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 24.084 sec. to 25.084 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00828 ( -1.91226 0.955039 )
Epeak [keV] : 75.8611 ( )
Norm@50keV : 1.56699E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.11 using 59 PHA bins.
# Reduced chi-squared = 0.9484 for 56 degrees of freedom
# Null hypothesis probability = 5.849542e-01
Photon flux (15-150 keV) in 1 sec: 0.932485 ( -0.216878 0.216985 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.53972e-08 ( -1.73657e-08 1.76322e-08 ) ergs/cm2
Band function
Time interval is from 24.084 sec. to 25.084 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.02926 ( -0.904726 1.532 )
beta : -9.36844 ( 9.37108 19.3711 )
Epeak [keV] : 77.3157 ( -34.5632 -77.2441 )
Norm@50keV : 1.52232E-02 ( -0.00865426 0.0187294 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.11 using 59 PHA bins.
# Reduced chi-squared = 0.9657 for 55 degrees of freedom
# Null hypothesis probability = 5.471284e-01
Photon flux (15-150 keV) in 1 sec: 0.932842 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 6.59558e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.5535 (-3.2948 4.27799)
R^2/D10^2 : 0.155635 (-0.0990213 0.268803)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.32 using 59 PHA bins.
# Reduced chi-squared = 1.006 for 57 degrees of freedom
# Null hypothesis probability = 4.630358e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.054e-09 2.797e-09
25- 50 2.179e-08 9.509e-09
50-150 2.591e-08 1.272e-08
15-150 5.375e-08 1.925e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 166.709 (-98.1905 -164.298)
Norm : 3.90100 (-0.897388 1.3397)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.21 using 59 PHA bins.
# Reduced chi-squared = 0.9336 for 57 degrees of freedom
# Null hypothesis probability = 6.179021e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.920e-09 5.655e-09
25- 50 1.866e-08 1.044e-08
50-150 3.841e-08 2.306e-08
15-150 6.699e-08 3.882e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.20259 (-4.02514 5.85654)
R1^2/D10^2 : 0.972915 (-0.801922 16.7724)
kT2 [keV] : 24.4056 (-21.5535 -24.7737)
R2^2/D10^2 : 1.27863E-02 (-0.0123121 0.117945)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.77 using 59 PHA bins.
# Reduced chi-squared = 0.9595 for 55 degrees of freedom
# Null hypothesis probability = 5.602736e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.684e-09 6.105e-09
25- 50 1.958e-08 1.095e-08
50-150 3.547e-08 1.961e-08
15-150 6.473e-08 3.284e-08
Plot creation:
Fri Jul 24 23:57:22 EDT 2015