batgrbproduct Analysis for Trigger=595608
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): Sun Apr 13 17:23:23 EDT 2014
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger595608/GCN5_download_cron
======================================================================
Trigger: 00595608 Segment: 000
BAT Trigger Time: 419034061.632 [s; MET]
Trigger Stop: 419034062.656 [s; MET]
UTC: 2014-04-12T22:20:49.752900 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 145.049609678632 Dec: -65.8089066452474 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10
Image Trigger?: NO
Rate S/N Ratio: 12.2882057274445 [ if not an image trigger ]
Image S/N Ratio: 10
Flight Position: [ source = BAT ]
RA: 145.049609678632 Dec: -65.8089066452474 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 145.031735729812 Dec: -65.8260685252231 [deg; J2000]
{ 09h 40m 07.6s , -65d 49' 33.8" }
+/- 1.66293683594754 [arcmin] (estimated 90% radius based on SNR)
+/- 0.538850066516994 [arcmin] (formal 1-sigma fit error)
SNR: 14.7089472073565
Angular difference between Flight and Ground position is 1.119513 arcmin
Partial Coding Fraction: 0.7734375 [ including projection effects ]
Duration
T90: 39.5799999833107 +/- 8.1480353820869
Measured from: -28.9959999322891
to: 10.5840000510216 [s; relative to TRIGTIME]
T50: 13.0639999508858 +/- 10.4087134922654
Measured from: -7.01999992132187
to: 6.0440000295639 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.0399999618530273
to: 1.03999996185303 [s; relative to TRIGTIME]
Total Fluence
Measured from: -36.9360000491142
to: 12.1759999990463 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.506038 0.544994 0.228708 0.116296
0.043191 0.043802 0.037881 0.033459 [error]
Peak 0.054982 0.053741 0.016216 0.000025
0.006845 0.006718 0.005955 0.004754 [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 1.53e-07 2.14e-07 2.22e-07 4.21e-07 7.22e-07 1.01e-06 erg/cm2
Error 2.11e-08 2.01e-08 3.71e-08 1.42e-07 8.35e-08 1.80e-07 erg/cm2
Peak flux Power-law 5.38e-01 3.53e-01 1.51e-01 8.84e-02 1.09e+00 1.13e+00 ph/cm2/s
Error 1.06e-01 5.57e-02 4.63e-02 5.04e-02 1.61e-01 1.72e-01 ph/cm2/s
Fluence Cutoff-PL 1.53e-07 2.14e-07 2.21e-07 4.16e-07 7.21e-07 1.01e-06 erg/cm2
Error 2.10e-08 2.01e-08 3.70e-08 8.43e-08 2.32e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 5.37e-01 3.53e-01 1.51e-01 8.78e-02 1.08e+00 1.12e+00 ph/cm2/s
Error 1.08e-01 6.86e-02 5.77e-02 7.30e-02 1.65e-01 1.89e-01 ph/cm2/s
Fluence Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Peak flux Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.949 0.187 - - 1.60e-03 1.91e-04 48.240 57
CPL 1.952 0.547 9999.3 0.0 1.60e-03 0.00e+00 48.250 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.227 0.319 - - 6.47e-03 1.49e-03 65.470 57
CPL 1.966 0.000 5.0 0.0 9.34e-03 0.00e+00 65.580 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: 4.800000 sec.
T50 in the 50-300 keV band: 2.944000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 49.112 -36.936 12.176
T90 39.580 -28.996 10.584
T50 13.064 -7.020 6.044
Peak 1.000 0.040 1.040
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
145.0317 -65.8261 0.0130 16.2 86.9 1.3630 14.7 TRIG_00595608
------------------------------------------
Foreground time interval of the image:
-36.936 12.176 (delta_t = 49.112 [sec])
Background time interval of the image:
-239.632 -101.282 (delta_t = 138.350 [sec])
-100.632 -36.936 (delta_t = 63.696 [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 -36.936 sec. to 12.176 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.94926 ( -0.18296 0.190647 )
Norm@50keV : 1.59774E-03 ( -0.00019292 0.000188226 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.24 using 59 PHA bins.
# Reduced chi-squared = 0.8464 for 57 degrees of freedom
# Null hypothesis probability = 7.890121e-01
Photon flux (15-150 keV) in 49.11 sec: 0.234239 ( -0.0218724 0.0218785 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.22069e-07 ( -8.26281e-08 8.44456e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -36.936 sec. to 12.176 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.95168 ( -0.193194 0.900482 )
Epeak [keV] : 9999.26 ( )
Norm@50keV : 1.59646E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.25 using 59 PHA bins.
# Reduced chi-squared = 0.8615 for 56 degrees of freedom
# Null hypothesis probability = 7.598514e-01
Photon flux (15-150 keV) in 49.11 sec: 0.234280 ( -0.021941 0.021799 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.215e-07 ( -8.47982e-08 8.37276e-08 ) ergs/cm2
Band function
Time interval is from -36.936 sec. to 12.176 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.33077 ( 1.31896 1.31896 )
beta : -2.02827 ( -2.86983 0.247766 )
Epeak [keV] : 32.0301 ( -32.0473 195.803 )
Norm@50keV : 4.26052E-03 ( -0.00455177 547.082 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.77 using 59 PHA bins.
# Reduced chi-squared = 0.8686 for 55 degrees of freedom
# Null hypothesis probability = 7.446423e-01
Photon flux (15-150 keV) in 49.11 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] : 9.04977 (-0.977887 1.12864)
R^2/D10^2 : 0.155385 (-0.0570461 0.0878988)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.91 using 59 PHA bins.
# Reduced chi-squared = 1.332 for 57 degrees of freedom
# Null hypothesis probability = 4.777619e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.220e-07 2.063e-08
25- 50 2.616e-07 3.190e-08
50-150 1.015e-07 2.851e-08
15-150 4.851e-07 5.805e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 70.9245 (-20.52 35.9102)
Norm : 1.13419 (-0.172744 0.207487)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.04 using 59 PHA bins.
# Reduced chi-squared = 0.9130 for 57 degrees of freedom
# Null hypothesis probability = 6.612351e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.431e-07 1.849e-08
25- 50 2.285e-07 2.262e-08
50-150 2.963e-07 8.329e-08
15-150 6.679e-07 9.454e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.46111 (-1.10332 1.04432)
R1^2/D10^2 : 0.298363 (-0.0972988 0.133913)
kT2 [keV] : 91.7156 (-63.7955 -96.8584)
R2^2/D10^2 : 8.83454E-05 (-6.06567e-05 0.000875061)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.46 using 59 PHA bins.
# Reduced chi-squared = 0.7720 for 55 degrees of freedom
# Null hypothesis probability = 8.917432e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.417e-07 3.165e-08
25- 50 2.345e-07 5.154e-08
50-150 4.055e-07 3.416e-07
15-150 7.817e-07 3.455e-07
Peak spectrum fit
Power-law model
Time interval is from 0.040 sec. to 1.040 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.22665 ( -0.301388 0.336096 )
Norm@50keV : 6.46887E-03 ( -0.00151274 0.0014687 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.47 using 59 PHA bins.
# Reduced chi-squared = 1.149 for 57 degrees of freedom
# Null hypothesis probability = 2.063288e-01
Photon flux (15-150 keV) in 1 sec: 1.08618 ( -0.16142 0.161452 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.10601e-08 ( -1.16752e-08 1.22616e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.040 sec. to 1.040 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.96634 ( )
Epeak [keV] : 4.96370 ( )
Norm@50keV : 9.33641E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.58 using 59 PHA bins.
# Reduced chi-squared = 1.171 for 56 degrees of freedom
# Null hypothesis probability = 1.786863e-01
Photon flux (15-150 keV) in 1 sec: 1.08421 ( -0.166711 0.16304 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.06059e-08 ( -1.55402e-08 1.25532e-08 ) ergs/cm2
Band function
Time interval is from 0.040 sec. to 1.040 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.30463 ( 1.23491 1.23491 )
beta : -2.40550 ( 2.41816 0.467669 )
Epeak [keV] : 22.1142 ( -23.2286 15.1309 )
Norm@50keV : 2.81988E-02 ( -0.037616 4786.26 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.05 using 59 PHA bins.
# Reduced chi-squared = 1.183 for 55 degrees of freedom
# Null hypothesis probability = 1.665909e-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] : 7.54657 (-1.14271 1.35559)
R^2/D10^2 : 1.49693 (-0.731859 1.42273)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.85 using 59 PHA bins.
# Reduced chi-squared = 1.261 for 57 degrees of freedom
# Null hypothesis probability = 8.902379e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.471e-08 3.593e-09
25- 50 2.321e-08 6.135e-09
50-150 5.010e-09 2.417e-09
15-150 4.293e-08 9.220e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 41.7287 (-14.561 28.5986)
Norm : 6.80346 (-1.78102 2.70314)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.39 using 59 PHA bins.
# Reduced chi-squared = 1.165 for 57 degrees of freedom
# Null hypothesis probability = 1.849354e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.584e-08 3.135e-09
25- 50 2.122e-08 4.645e-09
50-150 1.718e-08 8.159e-09
15-150 5.424e-08 1.480e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.49925 (-1.49668 1.40205)
R1^2/D10^2 : 2.47914 (-1.34099 4.09537)
kT2 [keV] : 39.9061 (-24.0294 -40.0403)
R2^2/D10^2 : 1.90458E-03 (-0.00178263 0.0401273)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.05 using 59 PHA bins.
# Reduced chi-squared = 1.164 for 55 degrees of freedom
# Null hypothesis probability = 1.888709e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.586e-08 6.426e-09
25- 50 2.094e-08 8.534e-09
50-150 2.777e-08 1.684e-08
15-150 6.457e-08 2.520e-08
Plot creation:
Sun Apr 13 17:42:52 EDT 2014