batgrbproduct Analysis for Trigger=613160
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): Sat Sep 20 10:37:02 EDT 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger613160/batgroup_hand_proc
======================================================================
Trigger: 00613160 Segment: 000
BAT Trigger Time: 432832528.064 [s; MET]
Trigger Stop: 432832532.16 [s; MET]
UTC: 2014-09-19T15:15:15.516440 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 221.555860331452 Dec: -32.1541282696393 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.04
Image Trigger?: NO
Rate S/N Ratio: 20.4694894904587 [ if not an image trigger ]
Image S/N Ratio: 7.04
Flight Position: [ source = BAT ]
RA: 221.555860331452 Dec: -32.1541282696393 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 221.539717164789 Dec: -32.1531966857432 [deg; J2000]
{ 14h 46m 09.5s , -32d 09' 11.5" }
+/- 1.50214341437096 [arcmin] (estimated 90% radius based on SNR)
+/- 0.634700708055724 [arcmin] (formal 1-sigma fit error)
SNR: 17.0087941671919
Angular difference between Flight and Ground position is 0.821934 arcmin
Partial Coding Fraction: 0.1425781 [ including projection effects ]
Duration
T90: 151.32800000906 +/- 25.6256121776494
Measured from: 3.06400001049042
to: 154.39200001955 [s; relative to TRIGTIME]
T50: 67.5360000133514 +/- 10.4960762481002
Measured from: 24.0239999890327
to: 91.5600000023842 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 38.972000002861
to: 39.972000002861 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.744000017642975
to: 174.631999969482 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.900152 3.804787 2.509399 0.448154
0.255141 0.215573 0.187903 0.173390 [error]
Peak 0.079806 0.102755 0.043386 0.028756
0.020950 0.018352 0.015138 0.014160 [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 1.02e-06 1.62e-06 1.94e-06 4.55e-06 5.90e-06 9.14e-06 erg/cm2
Error 1.18e-07 1.14e-07 1.84e-07 9.17e-07 4.35e-07 1.06e-06 erg/cm2
Peak flux Power-law 8.90e-01 6.87e-01 3.55e-01 2.65e-01 2.05e+00 2.20e+00 ph/cm2/s
Error 3.09e-01 1.57e-01 1.16e-01 1.70e-01 4.78e-01 4.96e-01 ph/cm2/s
Fluence Cutoff-PL 9.11e-07 1.72e-06 2.00e-06 -------- 5.61e-06 -------- erg/cm2
Error 1.43e-07 1.38e-07 2.02e-07 -------- 4.88e-07 -------- erg/cm2
Peak flux Cutoff-PL 8.06e-01 7.77e-01 3.39e-01 6.58e-02 1.98e+00 1.98e+00 ph/cm2/s
Error 3.92e-01 2.69e-01 1.76e-01 1.56e-01 5.22e-01 6.04e-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 1.738 0.124 - - 3.64e-03 2.59e-04 45.150 57
CPL 1.095 0.538 69.1 41.5 7.70e-03 5.20e-03 40.280 56
The chi2 of BB fit is Chi-Squared Chi-Squared which shows a significant improvement in the fit over a PL.
Check the BB fit.
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.951 0.406 - - 1.40e-02 3.57e-03 55.910 57
CPL 0.923 3.604 42.8 -1.0 5.58e-02 7.31e+01 55.400 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: 92.800000 sec.
T50 in the 50-300 keV band: 41.536000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 175.376 -0.744 174.632
T90 151.328 3.064 154.392
T50 67.536 24.024 91.560
Peak 1.000 38.972 39.972
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
221.5397 -32.1532 0.0113 37.9709 -97.4751 10.0611871 17.009 TRIG_00613160
Foreground time interval of the image:
-0.744 174.632 (delta_t = 175.376 [sec])
Background time interval of the image:
-239.064 -0.744 (delta_t = 238.320 [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 -0.744 sec. to 174.632 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.73758 ( -0.122844 0.124637 )
Norm@50keV : 3.64130E-03 ( -0.000259575 0.000258069 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.15 using 59 PHA bins.
# Reduced chi-squared = 0.7921 for 57 degrees of freedom
# Null hypothesis probability = 8.716557e-01
Photon flux (15-150 keV) in 175.4 sec: 0.490130 ( -0.034829 0.034953 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.89775e-06 ( -4.34071e-07 4.36816e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.744 sec. to 174.632 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.09512 ( -0.570839 0.504863 )
Epeak [keV] : 69.1419 ( -13.8198 69.1682 )
Norm@50keV : 7.69947E-03 ( -0.00335759 0.00704883 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.28 using 59 PHA bins.
# Reduced chi-squared = 0.7193 for 56 degrees of freedom
# Null hypothesis probability = 9.438618e-01
Photon flux (15-150 keV) in 175.4 sec: 0.471518 ( -0.037532 0.037636 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.60996e-06 ( -4.85384e-07 4.89664e-07 ) ergs/cm2
Band function
Time interval is from -0.744 sec. to 174.632 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.09507 ( -0.379145 0.603838 )
beta : -10.0000 ( 10 3.55271e-14 )
Epeak [keV] : 69.1281 ( -13.8172 69.1253 )
Norm@50keV : 7.69921E-03 ( -0.0033607 0.0070534 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.28 using 59 PHA bins.
# Reduced chi-squared = 0.7324 for 55 degrees of freedom
# Null hypothesis probability = 9.315632e-01
Photon flux (15-150 keV) in 175.4 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] : 13.5951 (-1.09024 1.19401)
R^2/D10^2 : 7.38214E-02 (-0.0196379 0.026675)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.13 using 59 PHA bins.
# Reduced chi-squared = 1.353 for 57 degrees of freedom
# Null hypothesis probability = 3.913379e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.067e-07 6.744e-08
25- 50 1.829e-06 1.646e-07
50-150 2.192e-06 3.341e-07
15-150 4.528e-06 3.692e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 123.090 (-30.4224 45.5965)
Norm : 2.05949 (-0.179233 0.219158)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.68 using 59 PHA bins.
# Reduced chi-squared = 0.7137 for 57 degrees of freedom
# Null hypothesis probability = 9.495630e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.399e-07 1.008e-07
25- 50 1.689e-06 1.548e-07
50-150 3.051e-06 1.047e-06
15-150 5.680e-06 1.042e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.04914 (-1.51264 1.81626)
R1^2/D10^2 : 0.839163 (-0.497729 1.73323)
kT2 [keV] : 20.1981 (-3.26166 5.51261)
R2^2/D10^2 : 1.37220E-02 (-0.00858769 0.0146465)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.83 using 59 PHA bins.
# Reduced chi-squared = 0.7242 for 55 degrees of freedom
# Null hypothesis probability = 9.383229e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.126e-07 3.727e-07
25- 50 1.680e-06 4.916e-07
50-150 2.932e-06 1.024e-06
15-150 5.525e-06 1.582e-06
Peak spectrum fit
Power-law model
Time interval is from 38.972 sec. to 39.972 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.95140 ( -0.394803 0.417881 )
Norm@50keV : 1.39960E-02 ( -0.00362888 0.00351253 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.91 using 59 PHA bins.
# Reduced chi-squared = 0.9809 for 57 degrees of freedom
# Null hypothesis probability = 5.159297e-01
Photon flux (15-150 keV) in 1 sec: 2.05385 ( -0.47717 0.479364 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.28806e-07 ( -3.16539e-08 3.23253e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 38.972 sec. to 39.972 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.923155 ( -5.65792 1.55056 )
Epeak [keV] : 42.7749 ( -40.6514 -42.5925 )
Norm@50keV : 5.58235E-02 ( -0.0598052 146.149 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.40 using 59 PHA bins.
# Reduced chi-squared = 0.9892 for 56 degrees of freedom
# Null hypothesis probability = 4.977085e-01
Photon flux (15-150 keV) in 1 sec: 1.97528 ( -0.52824 0.51502 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15195e-07 ( -3.86921e-08 4.2713e-08 ) ergs/cm2
Band function
Time interval is from 38.972 sec. to 39.972 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.51969 ( -0.493684 -0.493684 )
beta : -2.63594 ( 2.58133 0.846047 )
Epeak [keV] : 35.3495 ( -36.5667 44.8009 )
Norm@50keV : 2.06696 ( -1.94454 282.802 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.94 using 59 PHA bins.
# Reduced chi-squared = 0.9807 for 55 degrees of freedom
# Null hypothesis probability = 5.151183e-01
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] : 9.89147 (-1.93941 2.56401)
R^2/D10^2 : 1.03731 (-0.628125 1.4221)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.16 using 59 PHA bins.
# Reduced chi-squared = 0.9852 for 57 degrees of freedom
# Null hypothesis probability = 5.067466e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.059e-08 9.917e-09
25- 50 5.041e-08 2.099e-08
50-150 2.549e-08 1.535e-08
15-150 9.649e-08 3.565e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 69.6097 (-32.4895 113.495)
Norm : 10.1947 (-3.14563 4.93979)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.43 using 59 PHA bins.
# Reduced chi-squared = 0.9724 for 57 degrees of freedom
# Null hypothesis probability = 5.342733e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.614e-08 9.375e-09
25- 50 4.153e-08 1.428e-08
50-150 5.312e-08 3.563e-08
15-150 1.208e-07 4.938e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 199.288 ( )
R1^2/D10^2 : 1.47597E-04 (-0.000109212 0.038435)
kT2 [keV] : 8.97629 (-2.08198 1.99266)
R2^2/D10^2 : 1.40353 (-0.832674 1.16616)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.00 using 59 PHA bins.
#Fit statistic : Chi-Squared = 51.89 using 59 PHA bins.
# Reduced chi-squared = 1.018 for 55 degrees of freedom
# Reduced chi-squared = 0.9435 for 55 degrees of freedom
# Null hypothesis probability = 4.371280e-01
# Null hypothesis probability = 5.942127e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.240e-08 1.250e-08
25- 50 4.875e-08 2.854e-08
50-150 2.779e-08 1.781e-08
15-150 9.893e-08 5.740e-08
Plot creation:
Sat Sep 20 10:58:30 EDT 2014