batgrbproduct Analysis for Trigger=732526
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 v2.46
Process Start Time (local time): Sat Jan 14 11:16:40 EST 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger732526/GCN5_download_cron
======================================================================
Trigger: 00732526 Segment: 000
BAT Trigger Time: 505994663.936 [s; MET]
Trigger Stop: 505994664.96 [s; MET]
UTC: 2017-01-13T10:04:05.482200 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 61.6485165726425 Dec: -71.9246030205622 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.08
Image Trigger?: NO
Rate S/N Ratio: 13.228756555323 [ if not an image trigger ]
Image S/N Ratio: 8.08
Flight Position: [ source = BAT ]
RA: 61.6485165726425 Dec: -71.9246030205622 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 61.7354300399908 Dec: -71.9327896645626 [deg; J2000]
{ 04h 06m 56.5s , -71d 55' 58.0" }
+/- 1.3237480809206 [arcmin] (estimated 90% radius based on SNR)
+/- 0.521492935282934 [arcmin] (formal 1-sigma fit error)
SNR: 20.3756159583715
Angular difference between Flight and Ground position is 1.690568 arcmin
Partial Coding Fraction: 0.8671875 [ including projection effects ]
Duration
T90: 20.6639999747276 +/- 4.44050316359119
Measured from: 0.264000117778778
to: 20.9280000925064 [s; relative to TRIGTIME]
T50: 10.6039999127388 +/- 0.648012347150839
Measured from: 2.19600015878677
to: 12.8000000715256 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.63200002908707
to: 2.63200002908707 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.607999980449677
to: 23.8439999818802 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.337981 0.478722 0.333973 0.065494
0.027956 0.029216 0.025739 0.022419 [error]
Peak 0.033599 0.052843 0.044995 0.009115
0.005962 0.006388 0.005828 0.004718 [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 1.05e-07 1.85e-07 2.49e-07 6.90e-07 7.22e-07 1.23e-06 erg/cm2
Error 1.21e-08 1.33e-08 2.48e-08 1.45e-07 5.92e-08 1.66e-07 erg/cm2
Peak flux Power-law 3.02e-01 3.47e-01 2.86e-01 3.95e-01 1.08e+00 1.33e+00 ph/cm2/s
Error 7.03e-02 5.00e-02 4.57e-02 1.31e-01 1.42e-01 1.86e-01 ph/cm2/s
Fluence Cutoff-PL 9.24e-08 2.00e-07 2.55e-07 2.25e-07 6.71e-07 7.72e-07 erg/cm2
Error 1.45e-08 1.72e-08 2.78e-08 1.70e-07 6.73e-08 1.82e-07 erg/cm2
Peak flux Cutoff-PL 2.82e-01 3.61e-01 2.96e-01 2.45e-01 1.06e+00 1.18e+00 ph/cm2/s
Error 8.07e-02 5.88e-02 5.12e-02 -------- 1.46e-01 1.85e-01 ph/cm2/s
Fluence Band 9.12e-08 1.99e-07 2.57e-07 2.35e-07 6.76e-07 7.73e-07 erg/cm2
Error 1.34e-08 1.69e-08 -------- -------- -------- -------- erg/cm2
Peak flux Band 2.82e-01 3.60e-01 2.96e-01 2.56e-01 1.06e+00 1.19e+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 1.569 0.126 - - 3.15e-03 2.35e-04 79.690 57
CPL 0.753 0.589 73.1 33.4 8.33e-03 6.57e-03 72.870 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.279 0.224 - - 9.07e-03 1.19e-03 54.140 57
CPL 0.874 0.734 139.8 0.0 1.45e-02 1.72e-02 53.380 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: 12.928000 sec.
T50 in the 50-300 keV band: 7.616000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 24.452 -0.608 23.844
T90 20.664 0.264 20.928
T50 10.604 2.196 12.800
Peak 1.000 1.632 2.632
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
61.7354 -71.9328 0.0094 14.5 109.1 0.7673 20.4 TRIG_00732526
------------------------------------------
Foreground time interval of the image:
-0.608 10.265 (delta_t = 10.873 [sec])
Background time interval of the image:
-239.936 -0.608 (delta_t = 239.328 [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 -0.608 sec. to 23.844 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.56861 ( -0.124662 0.126584 )
Norm@50keV : 3.14509E-03 ( -0.000235889 0.00023432 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.69 using 59 PHA bins.
# Reduced chi-squared = 1.398 for 57 degrees of freedom
# Null hypothesis probability = 2.529061e-02
Photon flux (15-150 keV) in 24.45 sec: 0.400328 ( -0.0285345 0.0285595 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.22057e-07 ( -5.88859e-08 5.9513e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.608 sec. to 23.844 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.753308 ( -0.629403 0.548211 )
Epeak [keV] : 73.0839 ( -14.4214 52.3383 )
Norm@50keV : 8.33469E-03 ( -0.00394439 0.00918981 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.87 using 59 PHA bins.
# Reduced chi-squared = 1.301 for 56 degrees of freedom
# Null hypothesis probability = 6.442796e-02
Photon flux (15-150 keV) in 24.45 sec: 0.384293 ( -0.030361 0.030364 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.71358e-07 ( -6.66531e-08 6.79612e-08 ) ergs/cm2
Band function
Time interval is from -0.608 sec. to 23.844 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.753240 ( -0.496338 0.675506 )
beta : -10.0000 ( 10 1.24345e-14 )
Epeak [keV] : 73.0696 ( -11.9398 52.3499 )
Norm@50keV : 8.33514E-03 ( -0.00394581 0.00919542 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.87 using 59 PHA bins.
# Reduced chi-squared = 1.325 for 55 degrees of freedom
# Null hypothesis probability = 5.373238e-02
Photon flux (15-150 keV) in 24.45 sec: 0.387316 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 6.75786e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.7547 (-1.12566 1.24601)
R^2/D10^2 : 6.11976E-02 (-0.0163075 0.0218534)
(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 = 6.994420e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.989e-08 7.861e-09
25- 50 2.188e-07 1.911e-08
50-150 2.701e-07 4.224e-08
15-150 5.488e-07 4.878e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 176.126 (-53.466 -176.075)
Norm : 1.64137 (-0.12212 0.134119)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.22 using 59 PHA bins.
# Reduced chi-squared = 1.320 for 57 degrees of freedom
# Null hypothesis probability = 5.335598e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.015e-07 1.796e-08
25- 50 1.922e-07 5.133e-08
50-150 4.038e-07 2.001e-07
15-150 6.975e-07 2.817e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.80016 (-2.41158 2.74085)
R1^2/D10^2 : 0.385776 (-0.234664 1.37624)
kT2 [keV] : 20.6870 (-4.25229 10.4654)
R2^2/D10^2 : 1.10671E-02 (-0.00892067 0.0112328)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.90 using 59 PHA bins.
# Reduced chi-squared = 1.344 for 55 degrees of freedom
# Null hypothesis probability = 4.537807e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.994e-08 4.048e-08
25- 50 2.000e-07 8.905e-08
50-150 3.702e-07 1.821e-07
15-150 6.601e-07 2.590e-07
Peak spectrum fit
Power-law model
Time interval is from 1.632 sec. to 2.632 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.27938 ( -0.224543 0.222879 )
Norm@50keV : 9.06806E-03 ( -0.00119639 0.00119339 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.14 using 59 PHA bins.
# Reduced chi-squared = 0.9498 for 57 degrees of freedom
# Null hypothesis probability = 5.831956e-01
Photon flux (15-150 keV) in 1 sec: 1.07784 ( -0.142225 0.142358 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.00681e-08 ( -1.34143e-08 1.36101e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.632 sec. to 2.632 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.874098 ( -0.944944 0.522083 )
Epeak [keV] : 139.821 ( -139.821 -139.821 )
Norm@50keV : 1.45440E-02 ( -0.00646185 0.0279984 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.38 using 59 PHA bins.
# Reduced chi-squared = 0.9533 for 56 degrees of freedom
# Null hypothesis probability = 5.745347e-01
Photon flux (15-150 keV) in 1 sec: 1.06121 ( -0.146179 0.14596 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.71577e-08 ( -1.48919e-08 1.47973e-08 ) ergs/cm2
Band function
Time interval is from 1.632 sec. to 2.632 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.922211 ( -0.616514 0.919523 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 148.458 ( -61.4886 -148.919 )
Norm@50keV : 1.38900E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.39 using 59 PHA bins.
# Reduced chi-squared = 0.9708 for 55 degrees of freedom
# Null hypothesis probability = 5.362284e-01
Photon flux (15-150 keV) in 1 sec: 1.06277 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.86859e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 16.5035 (-2.87947 3.66753)
R^2/D10^2 : 9.15212E-02 (-0.0445659 0.0837063)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.33 using 59 PHA bins.
# Reduced chi-squared = 1.146 for 57 degrees of freedom
# Null hypothesis probability = 2.097666e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.116e-09 1.311e-09
25- 50 2.210e-08 4.580e-09
50-150 4.255e-08 1.152e-08
15-150 6.976e-08 1.350e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-51.4336 -200)
Norm : 4.42065 (-0.582298 0.582298)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.16 using 59 PHA bins.
# Reduced chi-squared = 1.003 for 57 degrees of freedom
# Null hypothesis probability = 4.692149e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.101e-08 6.160e-09
25- 50 2.118e-08 1.183e-08
50-150 4.644e-08 2.580e-08
15-150 7.863e-08 4.395e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.81806 (-2.36936 3.79018)
R1^2/D10^2 : 0.712261 (-0.470321 1.00965)
kT2 [keV] : 30.9585 (-9.65752 35.4715)
R2^2/D10^2 : 9.08502E-03 (-0.00809305 0.0239714)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.37 using 59 PHA bins.
# Reduced chi-squared = 0.9340 for 55 degrees of freedom
# Null hypothesis probability = 6.141244e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.071e-09 5.042e-09
25- 50 2.135e-08 1.176e-08
50-150 5.894e-08 3.269e-08
15-150 8.936e-08 4.193e-08
Plot creation:
Sat Jan 14 11:27:17 EST 2017