batgrbproduct Analysis for Trigger=595141
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 9 09:38:28 EDT 2014
Host Name: bat1
Current Working Dir: /net/raid16/prebascript_archive/trigger595141/batgroup_hand_proc
======================================================================
Trigger: 00595141 Segment: 000
BAT Trigger Time: 418655766.656 [s; MET]
Trigger Stop: 418655768.704 [s; MET]
UTC: 2014-04-08T13:15:54.794960 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 290.684540061204 Dec: -12.578173144477 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.83
Image Trigger?: NO
Rate S/N Ratio: 11.7046999107196 [ if not an image trigger ]
Image S/N Ratio: 7.83
Flight Position: [ source = BAT ]
RA: 290.684540061204 Dec: -12.578173144477 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 290.7229854884 Dec: -12.5854802208005 [deg; J2000]
{ 19h 22m 53.5s , -12d 35' 07.7" }
+/- 1.92680269507966 [arcmin] (estimated 90% radius based on SNR)
+/- 0.933704679054798 [arcmin] (formal 1-sigma fit error)
SNR: 11.9181275726259
Angular difference between Flight and Ground position is 2.293624 arcmin
Partial Coding Fraction: 0.4023438 [ including projection effects ]
Duration
T90: 4 +/- 1.4142135623731
Measured from: -0.656000018119812
to: 3.34399998188019 [s; relative to TRIGTIME]
T50: 1 +/- 1.4142135623731
Measured from: 0.343999981880188
to: 1.34399998188019 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.343999981880188
to: 1.34399998188019 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.656000018119812
to: 3.34399998188019 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.126967 0.150400 0.160777 0.028680
0.023492 0.022503 0.019277 0.018979 [error]
Peak 0.041029 0.047262 0.038343 0.009732
0.011973 0.011373 0.009696 0.009407 [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 4.11e-08 7.60e-08 1.08e-07 3.25e-07 3.09e-07 5.50e-07 erg/cm2
Error 1.06e-08 1.17e-08 1.95e-08 1.30e-07 4.75e-08 1.43e-07 erg/cm2
Peak flux Power-law 4.18e-01 3.91e-01 2.55e-01 2.56e-01 1.17e+00 1.32e+00 ph/cm2/s
Error 1.70e-01 1.03e-01 7.98e-02 1.61e-01 3.01e-01 3.29e-01 ph/cm2/s
Fluence Cutoff-PL 3.79e-08 7.85e-08 1.12e-07 3.01e-07 0.00e+00 0.00e+00 erg/cm2
Error 1.32e-08 1.37e-08 2.19e-08 5.13e-08 0.00e+00 0.00e+00 erg/cm2
Peak flux Cutoff-PL 3.56e-01 4.51e-01 2.60e-01 6.26e-02 1.12e+00 1.13e+00 ph/cm2/s
Error 1.90e-01 1.43e-01 9.58e-02 1.89e-01 3.08e-01 2.62e-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 1.490 0.255 - - 8.12e-03 1.16e-03 51.450 57
CPL 1.099 0.941 121.9 0.0 1.25e-02 0.00e+00 51.030 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 1.620 0.416 - - 9.04e-03 2.32e-03 67.860 57
CPL 0.306 2.424 57.3 -21.8 4.80e-02 1.65e+00 66.420 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: 4.544000 sec.
T50 in the 50-300 keV band: 2.240000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 4.000 -0.656 3.344
T90 4.000 -0.656 3.344
T50 1.000 0.344 1.344
Peak 1.000 0.344 1.344
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
290.7230 -12.5855 0.0162 40.3270 -142.3019 0.5259895 11.918 TRIG_00595141
Foreground time interval of the image:
-0.656 3.344 (delta_t = 4.000 [sec])
Background time interval of the image:
-179.656 -0.656 (delta_t = 179.000 [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 -0.656 sec. to 3.344 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.49018 ( -0.254243 0.254778 )
Norm@50keV : 8.12393E-03 ( -0.00115798 0.00115466 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.45 using 59 PHA bins.
# Reduced chi-squared = 0.9026 for 57 degrees of freedom
# Null hypothesis probability = 6.826291e-01
Photon flux (15-150 keV) in 4 sec: 1.01153 ( -0.14994 0.15075 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.08772e-07 ( -4.72492e-08 4.77024e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.656 sec. to 3.344 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.09862 ( -1.25742 0.624044 )
Epeak [keV] : 121.871 ( -121.868 -121.868 )
Norm@50keV : 1.25117E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.03 using 59 PHA bins.
# Reduced chi-squared = 0.9112 for 56 degrees of freedom
# Null hypothesis probability = 6.631410e-01
Photon flux (15-150 keV) in 4 sec: 0.989846 ( -0.161656 0.237334 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.01417e-07 ( -5.13452e-08 5.132e-08 ) ergs/cm2
Band function
Time interval is from -0.656 sec. to 3.344 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.10081 ( 1.16567 0.713622 )
beta : -10.00000 ( 10 20 )
Epeak [keV] : 122.128 ( -52.4507 -122.128 )
Norm@50keV : 1.24852E-02 ( -0.00367421 0.00306813 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.03 using 59 PHA bins.
# Reduced chi-squared = 0.9278 for 55 degrees of freedom
# Null hypothesis probability = 6.271485e-01
Photon flux (15-150 keV) in 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] : 16.5347 (-2.5509 3.19092)
R^2/D10^2 : 8.16000E-02 (-0.0379308 0.0663808)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.21 using 59 PHA bins.
# Reduced chi-squared = 1.039 for 57 degrees of freedom
# Null hypothesis probability = 3.948003e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.831e-08 6.096e-09
25- 50 7.920e-08 1.972e-08
50-150 1.532e-07 4.420e-08
15-150 2.507e-07 5.452e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-81.4313 -199.363)
Norm : 4.16029 (-0.586267 0.586391)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.38 using 59 PHA bins.
# Reduced chi-squared = 0.9015 for 57 degrees of freedom
# Null hypothesis probability = 6.848414e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.144e-08 2.344e-08
25- 50 7.971e-08 4.396e-08
50-150 1.748e-07 9.610e-08
15-150 2.960e-07 1.664e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.64369 (-1.36975 2.91121)
R1^2/D10^2 : 13.7274 (-12.7397 193.222)
kT2 [keV] : 19.7448 (-3.64141 5.77872)
R2^2/D10^2 : 4.04819E-02 (-0.0245614 0.0328057)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.07 using 59 PHA bins.
# Reduced chi-squared = 0.8922 for 55 degrees of freedom
# Null hypothesis probability = 6.995108e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.342e-08 2.278e-08
25- 50 6.896e-08 2.619e-08
50-150 1.743e-07 6.116e-08
15-150 2.867e-07 8.806e-08
Peak spectrum fit
Power-law model
Time interval is from 0.344 sec. to 1.344 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.62019 ( -0.414424 0.416715 )
Norm@50keV : 9.03967E-03 ( -0.00233256 0.00230857 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.86 using 59 PHA bins.
# Reduced chi-squared = 1.191 for 57 degrees of freedom
# Null hypothesis probability = 1.537287e-01
Photon flux (15-150 keV) in 1 sec: 1.16901 ( -0.29948 0.301542 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.43422e-08 ( -2.25656e-08 2.30734e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.344 sec. to 1.344 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.306052 ( -3.25246 1.59505 )
Epeak [keV] : 57.2677 ( -13.6527 -57.2076 )
Norm@50keV : 4.79649E-02 ( -0.0481887 3.25645 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.42 using 59 PHA bins.
# Reduced chi-squared = 1.186 for 56 degrees of freedom
# Null hypothesis probability = 1.606560e-01
Photon flux (15-150 keV) in 1 sec: 1.11676 ( -0.306127 0.31008 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.48073e-08 ( -2.40787e-08 2.65097e-08 ) ergs/cm2
Band function
Time interval is from 0.344 sec. to 1.344 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5.67909 -5 )
beta : -1.95456 ( -0.882513 0.531714 )
Epeak [keV] : 28.3638 ( -9.08333 10.141 )
Norm@50keV : 541.293 ( -129.14 5367.5 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.44 using 59 PHA bins.
# Reduced chi-squared = 1.172 for 55 degrees of freedom
# Null hypothesis probability = 1.798989e-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] : 12.3614 (-2.8867 4.14296)
R^2/D10^2 : 0.269072 (-0.178607 0.454304)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.68 using 59 PHA bins.
# Reduced chi-squared = 1.187 for 57 degrees of freedom
# Null hypothesis probability = 1.572924e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.713e-09 4.461e-09
25- 50 2.838e-08 1.297e-08
50-150 2.658e-08 1.577e-08
15-150 6.368e-08 2.597e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 147.891 (-87.9001 -145.35)
Norm : 4.89093 (-1.30726 2.04329)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.07 using 59 PHA bins.
# Reduced chi-squared = 1.177 for 57 degrees of freedom
# Null hypothesis probability = 1.700191e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.258e-08 7.330e-09
25- 50 2.326e-08 1.341e-08
50-150 4.565e-08 2.842e-08
15-150 8.149e-08 4.851e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.42023 (-9.48656 4.62649)
R1^2/D10^2 : 0.587903 (-0.577875 -0.577875)
kT2 [keV] : 38.3132 (-39.6147 -39.6147)
R2^2/D10^2 : 2.74960E-03 (-0.00248563 0.385878)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.34 using 59 PHA bins.
# Reduced chi-squared = 1.188 for 55 degrees of freedom
# Null hypothesis probability = 1.604560e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.092e-08 6.835e-09
25- 50 2.728e-08 1.624e-08
50-150 4.310e-08 2.296e-08
15-150 8.129e-08 4.102e-08
Plot creation:
Wed Apr 9 10:06:46 EDT 2014