batgrbproduct Analysis for Trigger=603954
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): Fri Jul 11 04:29:36 EDT 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger603954/GCN5_download_cron
======================================================================
Trigger: 00603954 Segment: 000
BAT Trigger Time: 426680212.288 [s; MET]
Trigger Stop: 426680213.312 [s; MET]
UTC: 2014-07-10T10:16:40.041420 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 41.0871768965041 Dec: 35.4932251244368 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.54
Image Trigger?: NO
Rate S/N Ratio: 20.2731349327133 [ if not an image trigger ]
Image S/N Ratio: 11.54
Flight Position: [ source = BAT ]
RA: 41.0871768965041 Dec: 35.4932251244368 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 41.0881470629284 Dec: 35.4986646727779 [deg; J2000]
{ 02h 44m 21.2s , +35d 29' 55.2" }
+/- 1.78924452291602 [arcmin] (estimated 90% radius based on SNR)
+/- 0.858571168194144 [arcmin] (formal 1-sigma fit error)
SNR: 13.2483462723472
Angular difference between Flight and Ground position is 0.329796 arcmin
Partial Coding Fraction: 0.5859375 [ including projection effects ]
Duration
T90: 3.52000004053116 +/- 0.850562212274961
Measured from: -0.0719998478889465
to: 3.44800019264221 [s; relative to TRIGTIME]
T50: 1.20000004768372 +/- 0.667460868414215
Measured from: 0.360000133514404
to: 1.56000018119812 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.0440000295639038
to: 1.0440000295639 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.23199999332428
to: 3.80000001192093 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.158216 0.159979 0.077974 0.020050
0.017246 0.017918 0.015750 0.014073 [error]
Peak 0.071874 0.079213 0.052852 0.017807
0.009470 0.010041 0.008709 0.007324 [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 5.15e-08 6.99e-08 7.00e-08 1.27e-07 2.32e-07 3.18e-07 erg/cm2
Error 8.74e-09 8.74e-09 1.49e-08 5.26e-08 3.48e-08 6.97e-08 erg/cm2
Peak flux Power-law 7.41e-01 6.50e-01 3.91e-01 3.55e-01 1.93e+00 2.14e+00 ph/cm2/s
Error 1.50e-01 8.61e-02 7.28e-02 1.29e-01 2.55e-01 2.82e-01 ph/cm2/s
Fluence Cutoff-PL 4.78e-08 7.87e-08 6.63e-08 2.83e-08 2.13e-07 2.21e-07 erg/cm2
Error 9.87e-09 1.26e-08 1.83e-08 6.43e-08 3.79e-08 7.37e-08 erg/cm2
Peak flux Cutoff-PL 6.92e-01 6.91e-01 4.02e-01 1.89e-01 1.90e+00 1.97e+00 ph/cm2/s
Error 1.80e-01 1.19e-01 8.03e-02 1.91e-01 2.65e-01 3.55e-01 ph/cm2/s
Fluence Band 4.72e-08 7.88e-08 6.52e-08 4.93e-08 2.15e-07 2.41e-07 erg/cm2
Error 9.71e-09 1.22e-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 1.998 0.227 - - 6.25e-03 9.80e-04 49.250 57
CPL 1.016 1.123 41.1 0.0 2.35e-02 0.00e+00 46.430 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.733 0.227 - - 1.44e-02 2.08e-03 69.540 57
CPL 1.202 1.017 69.3 -11.1 2.80e-02 6.94e-02 68.820 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: 1.088000 sec.
T50 in the 50-300 keV band: 0.512000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 4.032 -0.232 3.800
T90 3.520 -0.072 3.448
T50 1.200 0.360 1.560
Peak 1.000 0.044 1.044
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
41.0881 +35.4987 0.0145 36.7 -152.3 0.4257 13.2 TRIG_00603954
------------------------------------------
Foreground time interval of the image:
-0.232 3.800 (delta_t = 4.032 [sec])
Background time interval of the image:
-239.288 -0.232 (delta_t = 239.056 [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 -0.232 sec. to 3.800 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.99834 ( -0.21881 0.234224 )
Norm@50keV : 6.25018E-03 ( -0.000992505 0.000967826 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.25 using 59 PHA bins.
# Reduced chi-squared = 0.8640 for 57 degrees of freedom
# Null hypothesis probability = 7.575330e-01
Photon flux (15-150 keV) in 4.032 sec: 0.936812 ( -0.115973 0.115991 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.32381e-07 ( -3.43703e-08 3.51814e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.232 sec. to 3.800 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.01558 ( -1.26331 0.983272 )
Epeak [keV] : 41.0723 ( )
Norm@50keV : 2.34712E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.43 using 59 PHA bins.
# Reduced chi-squared = 0.8292 for 56 degrees of freedom
# Null hypothesis probability = 8.151907e-01
Photon flux (15-150 keV) in 4.032 sec: 0.909212 ( -0.118924 0.119128 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.12653e-07 ( -3.60953e-08 3.962e-08 ) ergs/cm2
Band function
Time interval is from -0.232 sec. to 3.800 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.936780 ( -1.04612 0.936754 )
beta : -3.00785 ( 3.00195 1.05878 )
Epeak [keV] : 40.3929 ( -15.3761 20.1187 )
Norm@50keV : 2.63783E-02 ( -0.0262089 579.363 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.28 using 59 PHA bins.
# Reduced chi-squared = 0.8415 for 55 degrees of freedom
# Null hypothesis probability = 7.925108e-01
Photon flux (15-150 keV) in 4.032 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.14649e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.0691 (-1.36646 1.55514)
R^2/D10^2 : 0.434157 (-0.183653 0.323845)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.39 using 59 PHA bins.
# Reduced chi-squared = 0.9717 for 57 degrees of freedom
# Null hypothesis probability = 5.358430e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.623e-08 7.913e-09
25- 50 9.095e-08 1.611e-08
50-150 4.842e-08 1.584e-08
15-150 1.756e-07 2.768e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 64.2547 (-19.5228 34.1325)
Norm : 4.80747 (-0.885946 1.07518)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.64 using 59 PHA bins.
# Reduced chi-squared = 0.8182 for 57 degrees of freedom
# Null hypothesis probability = 8.347111e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.922e-08 8.094e-09
25- 50 7.645e-08 1.066e-08
50-150 9.196e-08 3.048e-08
15-150 2.176e-07 3.774e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.84500 (-2.19585 3.02755)
R1^2/D10^2 : 3.89600 (-3.0626 54.5758)
kT2 [keV] : 14.3771 (-3.43368 11.513)
R2^2/D10^2 : 8.49993E-02 (-0.0789712 0.198656)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.31 using 59 PHA bins.
# Reduced chi-squared = 0.8419 for 55 degrees of freedom
# Null hypothesis probability = 7.917590e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.855e-08 2.574e-08
25- 50 7.726e-08 4.103e-08
50-150 7.927e-08 4.550e-08
15-150 2.051e-07 1.058e-07
Peak spectrum fit
Power-law model
Time interval is from 0.044 sec. to 1.044 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.73314 ( -0.222465 0.232022 )
Norm@50keV : 1.43913E-02 ( -0.00210011 0.0020584 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.54 using 59 PHA bins.
# Reduced chi-squared = 1.220 for 57 degrees of freedom
# Null hypothesis probability = 1.231063e-01
Photon flux (15-150 keV) in 1 sec: 1.93399 ( -0.254948 0.255121 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.32931e-07 ( -1.99275e-08 2.01933e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.044 sec. to 1.044 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.20214 ( -1.30614 0.727362 )
Epeak [keV] : 69.3074 ( -47.1243 -69.3549 )
Norm@50keV : 2.79662E-02 ( -0.0279268 0.11092 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.82 using 59 PHA bins.
# Reduced chi-squared = 1.229 for 56 degrees of freedom
# Null hypothesis probability = 1.166791e-01
Photon flux (15-150 keV) in 1 sec: 1.90188 ( -0.26568 0.26344 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.27687e-07 ( -2.2238e-08 2.2713e-08 ) ergs/cm2
Band function
Time interval is from 0.044 sec. to 1.044 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.03216 ( 1.03233 1.53634 )
beta : -2.14673 ( 2.23776 0.669578 )
Epeak [keV] : 61.5632 ( -60.4991 209.772 )
Norm@50keV : 3.48993E-02 ( -0.0367659 2.8466e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.33 using 59 PHA bins.
# Reduced chi-squared = 1.242 for 55 degrees of freedom
# Null hypothesis probability = 1.068729e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.2796e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.7614 (-1.6627 1.90579)
R^2/D10^2 : 0.388479 (-0.157163 0.258719)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.36 using 59 PHA bins.
# Reduced chi-squared = 1.357 for 57 degrees of freedom
# Null hypothesis probability = 3.762059e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.342e-08 3.198e-09
25- 50 4.529e-08 8.040e-09
50-150 4.612e-08 1.240e-08
15-150 1.048e-07 1.835e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 118.592 (-45.9976 -117.887)
Norm : 8.29004 (-1.19015 1.4214)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.84 using 59 PHA bins.
# Reduced chi-squared = 1.208 for 57 degrees of freedom
# Null hypothesis probability = 1.352992e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.160e-08 4.060e-09
25- 50 3.857e-08 9.175e-09
50-150 6.843e-08 3.712e-08
15-150 1.286e-07 5.351e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.59738 (-1.67887 2.2218)
R1^2/D10^2 : 24.6738 (-21.7337 1124.83)
kT2 [keV] : 15.2493 (-2.51352 3.95491)
R2^2/D10^2 : 0.179180 (-0.10956 0.126645)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.69 using 59 PHA bins.
# Reduced chi-squared = 1.231 for 55 degrees of freedom
# Null hypothesis probability = 1.170291e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.180e-08 1.096e-08
25- 50 3.854e-08 1.472e-08
50-150 5.595e-08 2.224e-08
15-150 1.163e-07 5.367e-08
Plot creation:
Fri Jul 11 04:35:24 EDT 2014