batgrbproduct Analysis for Trigger=597519
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): Tue Apr 29 18:20:36 EDT 2014
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger597519/GCN5_download_cron
======================================================================
Trigger: 00597519 Segment: 000
BAT Trigger Time: 420417661.952 [s; MET]
Trigger Stop: 420417666.048 [s; MET]
UTC: 2014-04-28T22:40:50.007020 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 194.30789595948 Dec: 28.3219605402312 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.54
Image Trigger?: NO
Rate S/N Ratio: 12.369316876853 [ if not an image trigger ]
Image S/N Ratio: 8.54
Flight Position: [ source = BAT ]
RA: 194.30789595948 Dec: 28.3219605402312 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 194.364578053922 Dec: 28.3313903139756 [deg; J2000]
{ 12h 57m 27.5s , +28d 19' 53.0" }
+/- 2.17240054557276 [arcmin] (estimated 90% radius based on SNR)
+/- 0.898690791972073 [arcmin] (formal 1-sigma fit error)
SNR: 10.0409698065725
Angular difference between Flight and Ground position is 3.046683 arcmin
Partial Coding Fraction: 0.703125 [ including projection effects ]
Duration
T90: 17.4240000247955 +/- 5.89714507661994
Measured from: -13.2799999117851
to: 4.14400011301041 [s; relative to TRIGTIME]
T50: 6.14400005340576 +/- 2.66923213600554
Measured from: -3.93599992990494
to: 2.20800012350082 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.29999995231628
to: 2.29999995231628 [s; relative to TRIGTIME]
Total Fluence
Measured from: -14.1920000314713
to: 5.82400000095367 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.140932 0.217149 0.157184 0.007022
0.028102 0.029377 0.026469 0.025379 [error]
Peak 0.016391 0.036305 0.021715 0.001203
0.006651 0.007005 0.006211 0.005682 [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 4.78e-08 8.57e-08 1.18e-07 3.37e-07 3.40e-07 5.89e-07 erg/cm2
Error 1.12e-08 1.32e-08 2.54e-08 1.49e-07 6.13e-08 1.73e-07 erg/cm2
Peak flux Power-law 2.02e-01 2.12e-01 1.57e-01 1.89e-01 6.45e-01 7.61e-01 ph/cm2/s
Error 8.15e-02 5.57e-02 5.00e-02 1.21e-01 1.62e-01 1.98e-01 ph/cm2/s
Fluence Cutoff-PL 4.15e-08 9.75e-08 1.20e-07 7.43e-08 3.07e-07 3.33e-07 erg/cm2
Error 1.29e-08 1.77e-08 3.00e-08 1.51e-07 6.58e-08 1.58e-07 erg/cm2
Peak flux Cutoff-PL 1.68e-01 2.53e-01 1.60e-01 3.44e-02 6.08e-01 6.14e-01 ph/cm2/s
Error 9.39e-02 8.37e-02 7.07e-02 1.42e-01 1.69e-01 2.21e-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 1.539 0.257 - - 1.80e-03 2.95e-04 65.980 57
CPL 0.411 1.229 64.7 114.6 7.30e-03 2.02e-02 62.670 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.431 0.414 - - 5.25e-03 1.36e-03 55.450 57
CPL -0.160 3.202 60.0 -22.6 3.99e-02 6.55e+00 53.790 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 20.016 -14.192 5.824
T90 17.424 -13.280 4.144
T50 6.144 -3.936 2.208
Peak 1.000 1.300 2.300
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
194.3646 +28.3314 0.0192 21.6 126.9 0.5843 10.0 TRIG_00597519
------------------------------------------
Foreground time interval of the image:
-14.192 5.824 (delta_t = 20.016 [sec])
Background time interval of the image:
-239.952 -14.192 (delta_t = 225.760 [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 -14.192 sec. to 5.824 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.53935 ( -0.253592 0.260441 )
Norm@50keV : 1.80223E-03 ( -0.000296768 0.000292496 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.98 using 59 PHA bins.
# Reduced chi-squared = 1.158 for 57 degrees of freedom
# Null hypothesis probability = 1.942428e-01
Photon flux (15-150 keV) in 20.02 sec: 0.227455 ( -0.0346009 0.034613 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.40188e-07 ( -6.05231e-08 6.21076e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -14.192 sec. to 5.824 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.411380 ( -1.39146 1.0659 )
Epeak [keV] : 64.6971 ( -16.946 212.304 )
Norm@50keV : 7.29788E-03 ( -0.00729788 0.0331809 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.67 using 59 PHA bins.
# Reduced chi-squared = 1.119 for 56 degrees of freedom
# Null hypothesis probability = 2.516206e-01
Photon flux (15-150 keV) in 20.02 sec: 0.217979 ( -0.035502 0.035637 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.07197e-07 ( -6.32172e-08 6.83703e-08 ) ergs/cm2
Band function
Time interval is from -14.192 sec. to 5.824 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.418877 ( -0.960583 1.21003 )
beta : -9.37166 ( 9.37167 19.3717 )
Epeak [keV] : 64.9104 ( -16.1873 179.454 )
Norm@50keV : 7.22107E-03 ( -0.00722139 0.00620952 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.67 using 59 PHA bins.
# Reduced chi-squared = 1.139 for 55 degrees of freedom
# Null hypothesis probability = 2.227674e-01
Photon flux (15-150 keV) in 20.02 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] : 13.4904 (-2.26043 2.7822)
R^2/D10^2 : 3.83149E-02 (-0.0186228 0.0350905)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.35 using 59 PHA bins.
# Reduced chi-squared = 1.182 for 57 degrees of freedom
# Null hypothesis probability = 1.641311e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.957e-08 8.375e-09
25- 50 1.059e-07 2.830e-08
50-150 1.244e-07 3.784e-08
15-150 2.599e-07 5.863e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 175.286 (-86.7333 -175.285)
Norm : 0.939150 (-0.145342 0.170249)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.33 using 59 PHA bins.
# Reduced chi-squared = 1.129 for 57 degrees of freedom
# Null hypothesis probability = 2.355309e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.756e-08 2.665e-08
25- 50 9.005e-08 4.861e-08
50-150 1.888e-07 1.069e-07
15-150 3.264e-07 1.830e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.78544 (-3.58905 4.64569)
R1^2/D10^2 : 0.218346 (-0.16978 3.05755)
kT2 [keV] : 19.9245 (-16.7339 25.21)
R2^2/D10^2 : 7.33748E-03 (-0.00705154 0.0166899)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.07 using 59 PHA bins.
# Reduced chi-squared = 1.129 for 55 degrees of freedom
# Null hypothesis probability = 2.388386e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.253e-08 2.403e-08
25- 50 9.622e-08 4.855e-08
50-150 1.705e-07 9.742e-08
15-150 3.092e-07 1.622e-07
Peak spectrum fit
Power-law model
Time interval is from 1.300 sec. to 2.300 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.43074 ( -0.413059 0.415683 )
Norm@50keV : 5.25458E-03 ( -0.00136547 0.00134928 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.45 using 59 PHA bins.
# Reduced chi-squared = 0.9727 for 57 degrees of freedom
# Null hypothesis probability = 5.335501e-01
Photon flux (15-150 keV) in 1 sec: 0.644512 ( -0.16174 0.161974 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.04674e-08 ( -1.42131e-08 1.47154e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.300 sec. to 2.300 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.159664 ( -4.36605 2.03778 )
Epeak [keV] : 59.9630 ( -14.5016 -59.7941 )
Norm@50keV : 3.98525E-02 ( -0.0405753 13.0685 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.79 using 59 PHA bins.
# Reduced chi-squared = 0.9605 for 56 degrees of freedom
# Null hypothesis probability = 5.589839e-01
Photon flux (15-150 keV) in 1 sec: 0.608442 ( -0.168871 0.169409 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.26544e-08 ( -1.50817e-08 1.79183e-08 ) ergs/cm2
Band function
Time interval is from 1.300 sec. to 2.300 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.58292 ( -4.58292 -4.58292 )
beta : -2.13647 ( -1.59976 0.764191 )
Epeak [keV] : 37.8063 ( -37.8063 11.5828 )
Norm@50keV : 28.9267 ( -7.01962 2.25202e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.04 using 59 PHA bins.
# Reduced chi-squared = 0.9644 for 55 degrees of freedom
# Null hypothesis probability = 5.498848e-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] : 13.1300 (-3.06747 4.5291)
R^2/D10^2 : 0.123391 (-0.0807177 0.194447)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.41 using 59 PHA bins.
# Reduced chi-squared = 0.9545 for 57 degrees of freedom
# Null hypothesis probability = 5.729408e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.511e-09 2.275e-09
25- 50 1.570e-08 6.935e-09
50-150 1.721e-08 9.041e-09
15-150 3.743e-08 1.866e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.361 (-123.785 -199.363)
Norm : 2.66027 (-0.659606 0.660079)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.99 using 59 PHA bins.
# Reduced chi-squared = 0.9648 for 57 degrees of freedom
# Null hypothesis probability = 5.507299e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.624e-09 4.078e-09
25- 50 1.274e-08 7.650e-09
50-150 2.795e-08 1.684e-08
15-150 4.731e-08 2.824e-08
Double BB
R1^2/D10^2 : 0.193601 ( )
kT2 [keV] : 199.261 ( )
R2^2/D10^2 : 6.18738E-05 (-6.18744e-05 0.210831)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.75 using 59 PHA bins.
#Fit statistic : Chi-Squared = 52.72 using 59 PHA bins.
#Fit statistic : Chi-Squared = 52.55 using 59 PHA bins.
# Reduced chi-squared = 0.9592 for 55 degrees of freedom
# Reduced chi-squared = 0.9585 for 55 degrees of freedom
# Reduced chi-squared = 0.9554 for 55 degrees of freedom
# Null hypothesis probability = 5.609186e-01
# Null hypothesis probability = 5.622460e-01
# Null hypothesis probability = 5.688983e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.363e-09 3.474e-09
25- 50 1.515e-08 9.885e-09
50-150 2.683e-08 1.471e-08
15-150 4.734e-08 2.413e-08
Plot creation:
Tue Apr 29 19:05:13 EDT 2014