batgrbproduct Analysis for Trigger=596901
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): Wed Apr 23 20:59:31 EDT 2014
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger596901/GCN5_download_cron
======================================================================
Trigger: 00596901 Segment: 000
BAT Trigger Time: 419934725.184 [s; MET]
Trigger Stop: 419934729.28 [s; MET]
UTC: 2014-04-23T08:31:53.262020 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 197.290296592494 Dec: 49.8145967622945 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.94
Image Trigger?: NO
Rate S/N Ratio: 10.9544511501033 [ if not an image trigger ]
Image S/N Ratio: 9.94
Flight Position: [ source = BAT ]
RA: 197.290296592494 Dec: 49.8145967622945 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 197.275960997039 Dec: 49.8384298005951 [deg; J2000]
{ 13h 09m 06.2s , +49d 50' 18.3" }
+/- 0.911497909633015 [arcmin] (estimated 90% radius based on SNR)
+/- 0.354520214812375 [arcmin] (formal 1-sigma fit error)
SNR: 34.7224427058677
Angular difference between Flight and Ground position is 1.533864 arcmin
Partial Coding Fraction: 0.3984375 [ including projection effects ]
Duration
T90: 134.336000025272 +/- 23.0119829578041
Measured from: -50.9599999189377
to: 83.3760001063347 [s; relative to TRIGTIME]
T50: 53.8240000009537 +/- 2.91112074394723
Measured from: 2.60800009965897
to: 56.4320001006126 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 44.1879999637604
to: 45.1879999637604 [s; relative to TRIGTIME]
Total Fluence
Measured from: -130.128000020981
to: 108.912000000477 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.334108 5.020915 4.443351 1.271862
0.127155 0.134507 0.120283 0.101872 [error]
Peak 0.056514 0.105176 0.082026 0.042076
0.009163 0.010784 0.009795 0.007755 [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 1.04e-06 2.13e-06 3.38e-06 1.19e-05 9.38e-06 1.85e-05 erg/cm2
Error 6.50e-08 7.69e-08 1.21e-07 9.90e-07 3.02e-07 1.05e-06 erg/cm2
Peak flux Power-law 5.58e-01 6.78e-01 5.97e-01 9.05e-01 2.15e+00 2.74e+00 ph/cm2/s
Error 1.15e-01 8.70e-02 7.78e-02 2.45e-01 2.45e-01 3.29e-01 ph/cm2/s
Fluence Cutoff-PL 1.00e-06 2.15e-06 3.43e-06 9.48e-06 9.29e-06 1.61e-05 erg/cm2
Error 6.22e-08 8.29e-08 1.39e-07 3.28e-07 2.28e-06 0.00e+00 erg/cm2
Peak flux Cutoff-PL 5.41e-01 6.92e-01 6.09e-01 7.18e-01 2.14e+00 2.56e+00 ph/cm2/s
Error 1.29e-01 1.03e-01 8.97e-02 3.70e-01 2.48e-01 4.88e-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 1.332 0.056 - - 4.00e-03 1.21e-04 45.520 57
CPL 1.163 0.209 275.8 0.0 4.78e-03 0.00e+00 43.760 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.183 0.188 - - 1.84e-02 2.05e-03 72.150 57
CPL 0.998 0.611 277.8 0.0 2.28e-02 2.39e-02 71.970 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: 112.448000 sec.
T50 in the 50-300 keV band: 51.008000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 239.040 -130.128 108.912
T90 134.336 -50.960 83.376
T50 53.824 2.608 56.432
Peak 1.000 44.188 45.188
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
197.2760 +49.8384 0.0055 29.1 105.7 15.2815 34.7 TRIG_00596901
------------------------------------------
Foreground time interval of the image:
-130.128 108.912 (delta_t = 239.040 [sec])
Background time interval of the image:
-239.184 -130.128 (delta_t = 109.056 [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 -130.128 sec. to 108.912 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.33200 ( -0.0564925 0.0562894 )
Norm@50keV : 4.00284E-03 ( -0.000121134 0.00012111 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.52 using 59 PHA bins.
# Reduced chi-squared = 0.7987 for 57 degrees of freedom
# Null hypothesis probability = 8.628648e-01
Photon flux (15-150 keV) in 239 sec: 0.480479 ( -0.0157823 0.0158212 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.38206e-06 ( -3.01847e-07 3.02368e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -130.128 sec. to 108.912 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.16281 ( -0.227681 0.190489 )
Epeak [keV] : 275.758 ( )
Norm@50keV : 4.77807E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.76 using 59 PHA bins.
# Reduced chi-squared = 0.7814 for 56 degrees of freedom
# Null hypothesis probability = 8.828605e-01
Photon flux (15-150 keV) in 239 sec: 0.475255 ( -0.017031 0.017069 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.28833e-06 ( -3.29007e-07 3.27382e-07 ) ergs/cm2
Band function
Time interval is from -130.128 sec. to 108.912 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.529747 ( -3.8586 -1.16537 )
beta : -1.37724 ( -7.91899 0.0707842 )
Epeak [keV] : 38.5424 ( -11.6404 90.2399 )
Norm@50keV : 7.70208E-02 ( -0.0768835 94.6297 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.78 using 59 PHA bins.
# Reduced chi-squared = 0.7596 for 55 degrees of freedom
# Null hypothesis probability = 9.055492e-01
Photon flux (15-150 keV) in 239 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] : 18.4148 ( )
R^2/D10^2 : 2.73610E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 250.85 using 59 PHA bins.
# Reduced chi-squared = 4.4009 for 57 degrees of freedom
# Null hypothesis probability = 3.819919e-26
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.407e-07 2.892e-08
25- 50 2.073e-06 9.918e-08
50-150 5.130e-06 2.605e-07
15-150 7.643e-06 2.856e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 2.02372 (-0.0616733 0.0616434)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 95.04 using 59 PHA bins.
# Reduced chi-squared = 1.667 for 57 degrees of freedom
# Null hypothesis probability = 1.172557e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.205e-06 4.338e-08
25- 50 2.318e-06 7.911e-08
50-150 5.083e-06 1.685e-07
15-150 8.605e-06 2.772e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.04255 (-1.01685 1.15059)
R1^2/D10^2 : 0.276057 (-0.0928287 0.154758)
kT2 [keV] : 31.3319 (-3.74783 5.6532)
R2^2/D10^2 : 3.78640E-03 (-0.00159493 0.00210322)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.98 using 59 PHA bins.
# Reduced chi-squared = 0.8905 for 55 degrees of freedom
# Null hypothesis probability = 7.028018e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.100e-07 1.139e-07
25- 50 2.218e-06 1.754e-07
50-150 6.147e-06 6.345e-07
15-150 9.275e-06 6.979e-07
Peak spectrum fit
Power-law model
Time interval is from 44.188 sec. to 45.188 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.18302 ( -0.190007 0.186621 )
Norm@50keV : 1.83519E-02 ( -0.00205173 0.00205126 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.15 using 59 PHA bins.
# Reduced chi-squared = 1.266 for 57 degrees of freedom
# Null hypothesis probability = 8.521217e-02
Photon flux (15-150 keV) in 1 sec: 2.14915 ( -0.244462 0.244652 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.87094e-07 ( -2.33927e-08 2.35743e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 44.188 sec. to 45.188 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.998426 ( -0.869415 0.353132 )
Epeak [keV] : 277.761 ( -278.456 -278.456 )
Norm@50keV : 2.27558E-02 ( -0.00892784 0.0389344 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.97 using 59 PHA bins.
# Reduced chi-squared = 1.285 for 56 degrees of freedom
# Null hypothesis probability = 7.389224e-02
Photon flux (15-150 keV) in 1 sec: 2.13865 ( -0.24848 0.24804 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.84724e-07 ( -2.6293e-08 2.5141e-08 ) ergs/cm2
Band function
Time interval is from 44.188 sec. to 45.188 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.96597 ( -14.6996 -4.96597 )
beta : -1.33299 ( -0.24056 0.228419 )
Epeak [keV] : 29.3540 ( -9.7336 6.1948 )
Norm@50keV : 565.377 ( -62.7323 5786.56 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.12 using 59 PHA bins.
# Reduced chi-squared = 1.257 for 55 degrees of freedom
# Null hypothesis probability = 9.545977e-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] : 16.5377 (-2.20507 2.77576)
R^2/D10^2 : 0.187851 (-0.0766665 0.117338)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 86.03 using 59 PHA bins.
# Reduced chi-squared = 1.509 for 57 degrees of freedom
# Null hypothesis probability = 7.768753e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.054e-08 2.367e-09
25- 50 4.560e-08 8.125e-09
50-150 8.823e-08 1.976e-08
15-150 1.444e-07 2.485e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 8.79214 (-1.0046 1.00457)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.57 using 59 PHA bins.
# Reduced chi-squared = 1.431 for 57 degrees of freedom
# Null hypothesis probability = 1.808370e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.189e-08 1.212e-08
25- 50 4.211e-08 2.327e-08
50-150 9.235e-08 5.050e-08
15-150 1.563e-07 8.670e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 11.8933 (-2.00746 2.61896)
R1^2/D10^2 : 0.464263 (-0.239513 0.394965)
kT2 [keV] : 200.000 ( )
R2^2/D10^2 : 3.25684E-04 (-0.000109135 9.01461e-05)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.08 using 59 PHA bins.
#Fit statistic : Chi-Squared = 65.73 using 59 PHA bins.
# Reduced chi-squared = 1.201 for 55 degrees of freedom
# Reduced chi-squared = 1.195 for 55 degrees of freedom
# Null hypothesis probability = 1.456659e-01
# Null hypothesis probability = 1.525015e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.458e-08 5.148e-09
25- 50 4.644e-08 1.762e-08
50-150 1.254e-07 1.023e-07
15-150 1.864e-07 1.151e-07
Plot creation:
Wed Apr 23 22:00:37 EDT 2014