batgrbproduct analysis for trigger=737125
batgrbproduct Analysis for Trigger=737125
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): Mon Feb 6 18:53:30 EST 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger737125/GCN5_download_cron
======================================================================
Trigger: 00737125 Segment: 000
BAT Trigger Time: 508111064.064 [s; MET]
Trigger Stop: 508111068.16 [s; MET]
UTC: 2017-02-06T21:57:25.488720 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 271.785667508088 Dec: 11.2228219729964 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.48
Image Trigger?: NO
Rate S/N Ratio: 9.32737905308882 [ if not an image trigger ]
Image S/N Ratio: 7.48
Flight Position: [ source = BAT ]
RA: 271.785667508088 Dec: 11.2228219729964 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 271.784144142727 Dec: 11.1745373343021 [deg; J2000]
{ 18h 07m 08.2s , +11d 10' 28.3" }
+/- 2.21496023328287 [arcmin] (estimated 90% radius based on SNR)
+/- 0.971105170051631 [arcmin] (formal 1-sigma fit error)
SNR: 9.76648922076366
Angular difference between Flight and Ground position is 2.898465 arcmin
Partial Coding Fraction: 0.7890625 [ including projection effects ]
Duration
T90: 13.3600000143051 +/- 2.67104170068532
Measured from: -0.00799989700317383
to: 13.3520001173019 [s; relative to TRIGTIME]
T50: 7.53600001335144 +/- 3.01642438201616
Measured from: 1.83200013637543
to: 9.36800014972687 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.324000000953674
to: 0.675999999046326 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.328000009059906
to: 15.527999997139 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.144825 0.199895 0.122182 0.021915
0.029907 0.027842 0.023421 0.019622 [error]
Peak 0.018759 0.016389 0.015425 0.010045
0.007506 0.006977 0.006151 0.005073 [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 3.92e-08 7.54e-08 1.12e-07 3.61e-07 3.17e-07 5.88e-07 erg/cm2
Error 1.08e-08 1.29e-08 2.25e-08 1.57e-07 5.56e-08 1.73e-07 erg/cm2
Peak flux Power-law 9.95e-02 1.33e-01 1.32e-01 2.34e-01 4.40e-01 5.97e-01 ph/cm2/s
Error 8.48e-02 6.65e-02 4.99e-02 2.45e-01 1.63e-01 2.36e-01 ph/cm2/s
Fluence Cutoff-PL 3.12e-08 8.61e-08 1.16e-07 6.54e-08 2.78e-07 2.99e-07 erg/cm2
Error 1.37e-08 1.77e-08 2.75e-08 1.16e-07 6.57e-08 1.87e-07 erg/cm2
Peak flux Cutoff-PL 1.08e-01 1.38e-01 1.29e-01 2.14e-01 4.46e-01 5.85e-01 ph/cm2/s
Error -------- 6.74e-02 5.03e-02 2.83e-01 1.64e-01 2.56e-01 ph/cm2/s
Fluence Band 2.93e-08 8.78e-08 1.12e-07 1.56e-07 2.87e-07 3.92e-07 erg/cm2
Error 1.40e-08 1.80e-08 2.68e-08 -------- -------- -------- 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 1.424 0.272 - - 2.08e-03 3.33e-04 79.630 57
CPL 0.003 1.820 67.3 474.1 1.12e-02 7.11e-02 76.840 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.020 0.811 - - 3.82e-03 1.42e-03 68.970 57
CPL 1.049 0.818 9999.4 0.0 3.82e-03 0.00e+00 68.980 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: 8.768000 sec.
T50 in the 50-300 keV band: 4.928000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 15.856 -0.328 15.528
T90 13.360 -0.008 13.352
T50 7.536 1.832 9.368
Peak 1.000 -0.324 0.676
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
271.7841 +11.1745 0.0198 20.0 -120.9 0.4980 9.8 TRIG_00737125
------------------------------------------
Foreground time interval of the image:
-0.328 15.528 (delta_t = 15.856 [sec])
Background time interval of the image:
-239.064 -0.328 (delta_t = 238.736 [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 -0.328 sec. to 15.528 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.42431 ( -0.272987 0.270907 )
Norm@50keV : 2.07578E-03 ( -0.000333414 0.000332464 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.63 using 59 PHA bins.
# Reduced chi-squared = 1.397 for 57 degrees of freedom
# Null hypothesis probability = 2.553180e-02
Photon flux (15-150 keV) in 15.86 sec: 0.254219 ( -0.0415262 0.0417001 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.1658e-07 ( -5.51289e-08 5.60112e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.328 sec. to 15.528 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.49669E-03 ( -2.20875 1.43097 )
Epeak [keV] : 67.2914 ( -16.8132 931.326 )
Norm@50keV : 1.11868E-02 ( -0.0111956 0.130912 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.84 using 59 PHA bins.
# Reduced chi-squared = 1.372 for 56 degrees of freedom
# Null hypothesis probability = 3.375855e-02
Photon flux (15-150 keV) in 15.86 sec: 0.237372 ( -0.046018 0.045439 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.78354e-07 ( -6.27073e-08 6.86246e-08 ) ergs/cm2
Band function
Time interval is from -0.328 sec. to 15.528 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.696643 ( -1.86824 2.97355 )
beta : -2.29610 ( 2.2983 0.881783 )
Epeak [keV] : 57.3132 ( -32.8625 54.7647 )
Norm@50keV : 2.74975E-02 ( -0.0240155 24.6925 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.94 using 59 PHA bins.
# Reduced chi-squared = 1.381 for 55 degrees of freedom
# Null hypothesis probability = 3.220020e-02
Photon flux (15-150 keV) in 15.86 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.86936e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.6758 (-2.26674 2.88248)
R^2/D10^2 : 3.24082E-02 (-0.0153642 0.02669)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.26 using 59 PHA bins.
# Reduced chi-squared = 1.373 for 57 degrees of freedom
# Null hypothesis probability = 3.236149e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.326e-08 7.825e-09
25- 50 9.054e-08 2.412e-08
50-150 1.314e-07 4.331e-08
15-150 2.452e-07 7.120e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.355 (-87.7948 -199.362)
Norm : 1.05408 (-0.16663 0.166914)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.01 using 59 PHA bins.
# Reduced chi-squared = 1.386 for 57 degrees of freedom
# Null hypothesis probability = 2.844042e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.163e-08 2.362e-08
25- 50 8.008e-08 4.511e-08
50-150 1.756e-07 9.984e-08
15-150 2.973e-07 1.686e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 12.6584 (-2.34678 2.88706)
R1^2/D10^2 : 4.87173E-02 (-0.0244334 0.0365676)
kT2 [keV] : 199.136 (-199.247 -199.247)
R2^2/D10^2 : 2.04969E-05 (-1.04539e-05 0.01493)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.09 using 59 PHA bins.
#Fit statistic : Chi-Squared = 74.67 using 59 PHA bins.
# Reduced chi-squared = 1.402 for 55 degrees of freedom
# Reduced chi-squared = 1.358 for 55 degrees of freedom
# Null hypothesis probability = 2.630948e-02
# Null hypothesis probability = 3.993034e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.154e-08 1.741e-08
25- 50 8.540e-08 4.700e-08
50-150 1.446e-07 8.786e-08
15-150 2.615e-07 1.413e-07
Peak spectrum fit
Power-law model
Time interval is from -0.324 sec. to 0.676 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.01953 ( -0.884256 0.737052 )
Norm@50keV : 3.81947E-03 ( -0.00149091 0.00134697 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.97 using 59 PHA bins.
# Reduced chi-squared = 1.210 for 57 degrees of freedom
# Null hypothesis probability = 1.329477e-01
Photon flux (15-150 keV) in 1 sec: 0.440035 ( -0.161268 0.165188 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.10028e-08 ( -1.51896e-08 1.54638e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.324 sec. to 0.676 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.04938 ( -0.925754 0.709449 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 3.82350E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.98 using 59 PHA bins.
# Reduced chi-squared = 1.232 for 56 degrees of freedom
# Null hypothesis probability = 1.140864e-01
Photon flux (15-150 keV) in 1 sec: 0.445865 ( -0.167925 0.159815 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.08911e-08 ( -1.50382e-08 1.50526e-08 ) ergs/cm2
Band function
Time interval is from -0.324 sec. to 0.676 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.896559 ( 0.896454 0.896454 )
beta : -1.01978 ( 1.01922 0.883954 )
Epeak [keV] : 26.5138 ( -26.2123 -26.2123 )
Norm@50keV : 6.12054E-03 ( -0.00360977 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.97 using 59 PHA bins.
# Reduced chi-squared = 1.254 for 55 degrees of freedom
# Null hypothesis probability = 9.750548e-02
Photon flux (15-150 keV) in 1 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] : 22.4754 (-9.85239 62.3287)
R^2/D10^2 : 1.36782E-02 (-0.0132982 0.0741112)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.20 using 59 PHA bins.
# Reduced chi-squared = 1.267 for 57 degrees of freedom
# Null hypothesis probability = 8.455952e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.266e-09 8.475e-10
25- 50 6.779e-09 4.223e-09
50-150 2.559e-08 1.684e-08
15-150 3.364e-08 2.051e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.361 (-119.994 -199.363)
Norm : 1.85547 (-0.663549 0.663515)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.92 using 59 PHA bins.
# Reduced chi-squared = 1.244 for 57 degrees of freedom
# Null hypothesis probability = 1.016961e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.620e-09 2.969e-09
25- 50 8.888e-09 5.515e-09
50-150 1.949e-08 1.210e-08
15-150 3.300e-08 2.064e-08
Double BB
R1^2/D10^2 : 8.93694E-02 (-0.0808545 -0.0893895)
kT2 [keV] : 199.363 (-200 -200)
R2^2/D10^2 : 1.00603E-04 (-5.86184e-05 0.000827832)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.14 using 59 PHA bins.
#Fit statistic : Chi-Squared = 68.39 using 59 PHA bins.
#Fit statistic : Chi-Squared = 68.20 using 59 PHA bins.
# Reduced chi-squared = 1.257 for 55 degrees of freedom
# Reduced chi-squared = 1.243 for 55 degrees of freedom
# Reduced chi-squared = 1.240 for 55 degrees of freedom
# Null hypothesis probability = 9.507111e-02
# Null hypothesis probability = 1.060004e-01
# Null hypothesis probability = 1.088352e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.430e-09 2.130e-09
25- 50 5.161e-09 3.192e-09
50-150 3.028e-08 1.833e-08
15-150 3.987e-08 2.279e-08
Plot creation:
Mon Feb 6 19:16:11 EST 2017