batgrbproduct Analysis for Trigger=596641
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): Mon Apr 21 12:27:34 EDT 2014
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger596641/GCN5_download_cron
======================================================================
Trigger: 00596641 Segment: 000
BAT Trigger Time: 419733456 [s; MET]
Trigger Stop: 419733520 [s; MET]
UTC: 2014-04-21T00:37:24.087600 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 336.363285424354 Dec: 3.63626678930699 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.02
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.02
Flight Position: [ source = BAT ]
RA: 336.363285424354 Dec: 3.63626678930699 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 336.336324423597 Dec: 3.63008287316901 [deg; J2000]
{ 22h 25m 20.7s , +03d 37' 48.3" }
+/- 3.34951689991682 [arcmin] (estimated 90% radius based on SNR)
+/- 2.29277412507632 [arcmin] (formal 1-sigma fit error)
SNR: 5.40933460762451
Angular difference between Flight and Ground position is 1.656497 arcmin
Partial Coding Fraction: 0.5859375 [ including projection effects ]
Duration
T90: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
T50: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 64 second)
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.228906 0.228883 0.099618 -0.038920
0.057763 0.060104 0.053989 0.051203 [error]
Peak 0.228906 0.228883 0.099618 -0.038920
0.057763 0.060104 0.053989 0.051203 [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 7.70e-08 9.16e-08 7.88e-08 1.15e-07 2.88e-07 3.61e-07 erg/cm2
Error 2.74e-08 2.93e-08 4.24e-08 1.36e-07 1.05e-07 1.80e-07 erg/cm2
Peak flux Power-law 3.94e-02 2.60e-02 1.12e-02 6.60e-03 7.99e-02 8.31e-02 ph/cm2/s
Error 1.38e-02 8.14e-03 5.84e-03 7.33e-03 2.40e-02 2.53e-02 ph/cm2/s
Fluence Cutoff-PL 6.92e-08 1.26e-07 5.48e-08 2.93e-09 2.53e-07 2.53e-07 erg/cm2
Error 3.07e-08 4.21e-08 5.75e-08 2.90e-08 9.14e-08 9.43e-08 erg/cm2
Peak flux Cutoff-PL 3.44e-02 3.57e-02 8.50e-03 2.51e-04 7.88e-02 7.88e-02 ph/cm2/s
Error 1.59e-02 1.17e-02 8.41e-03 2.01e-03 2.30e-02 2.30e-02 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 7.91e-02 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 2.214 0.525 - - 4.79e-04 1.97e-04 53.080 57
CPL -0.472 3.777 33.9 16.1 2.28e-02 7.94e+01 48.580 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.214 0.525 - - 4.79e-04 1.97e-04 53.080 57
CPL -0.472 3.777 33.9 16.1 2.28e-02 7.94e+01 48.580 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 64.000 0.000 64.000
T90 64.000 0.000 64.000
T50 64.000 0.000 64.000
Peak 64.000 0.000 64.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
336.3363 +3.6301 0.0353 39.8 -162.8 0.6561 5.4 TRIG_00596641
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [sec])
Background time interval of the image:
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 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.21380 ( -0.479145 0.57078 )
Norm@50keV : 4.78915E-04 ( -0.000197158 0.000197173 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.08 using 59 PHA bins.
# Reduced chi-squared = 0.9311 for 57 degrees of freedom
# Null hypothesis probability = 6.230537e-01
Photon flux (15-150 keV) in 64 sec: 7.98527E-02 ( -0.023959 0.0240044 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.88223e-07 ( -1.01219e-07 1.09677e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.471758 ( -5.29508 2.25993 )
Epeak [keV] : 33.9217 ( -18.5866 13.6382 )
Norm@50keV : 2.28243E-02 ( -0.0261913 158.815 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.58 using 59 PHA bins.
# Reduced chi-squared = 0.8675 for 56 degrees of freedom
# Null hypothesis probability = 7.488709e-01
Photon flux (15-150 keV) in 64 sec: 7.87997E-02 ( -0.0228629 0.0231523 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.53114e-07 ( -8.4368e-08 9.84128e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.496832 ( -2.16197 4.26344 )
beta : -10.0000 ( 10 4.61853e-14 )
Epeak [keV] : 33.9146 ( -14.6176 14.1898 )
Norm@50keV : 2.37545E-02 ( -0.0237564 16.0099 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.58 using 59 PHA bins.
# Reduced chi-squared = 0.8832 for 55 degrees of freedom
# Null hypothesis probability = 7.169309e-01
Photon flux (15-150 keV) in 64 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] : 8.66438 (-2.28849 2.97434)
R^2/D10^2 : 7.15661E-02 (-0.0715661 0.166372)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.86 using 59 PHA bins.
# Reduced chi-squared = 0.8572 for 57 degrees of freedom
# Null hypothesis probability = 7.699404e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.556e-08 3.899e-08
25- 50 1.312e-07 7.913e-08
50-150 4.448e-08 3.341e-08
15-150 2.412e-07 1.477e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 42.1975 (-19.5483 48.7063)
Norm : 0.523625 (-0.202234 0.338854)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.28 using 59 PHA bins.
# Reduced chi-squared = 0.8822 for 57 degrees of freedom
# Null hypothesis probability = 7.232226e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.829e-08 4.770e-08
25- 50 1.054e-07 5.429e-08
50-150 8.634e-08 6.533e-08
15-150 2.700e-07 1.624e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.79438 (-5.79292 192.236)
R1^2/D10^2 : 0.168387 (-0.16839 -0.16839)
kT2 [keV] : 11.5649 (-11.5603 -11.5603)
R2^2/D10^2 : 1.47057E-02 (-0.0147398 0.195507)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.35 using 59 PHA bins.
# Reduced chi-squared = 0.8792 for 55 degrees of freedom
# Null hypothesis probability = 7.247178e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.217e-08 6.896e-08
25- 50 1.220e-07 1.254e-07
50-150 6.594e-08 6.560e-08
15-150 2.601e-07 2.686e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.21380 ( -0.479145 0.57078 )
Norm@50keV : 4.78915E-04 ( -0.000197158 0.000197173 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.08 using 59 PHA bins.
# Reduced chi-squared = 0.9311 for 57 degrees of freedom
# Null hypothesis probability = 6.230537e-01
Photon flux (15-150 keV) in 64 sec: 7.98527E-02 ( -0.023959 0.0240044 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.88223e-07 ( -1.01219e-07 1.09677e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.471758 ( -5.29508 2.25993 )
Epeak [keV] : 33.9217 ( -18.5866 13.6382 )
Norm@50keV : 2.28243E-02 ( -0.0261913 158.815 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.58 using 59 PHA bins.
# Reduced chi-squared = 0.8675 for 56 degrees of freedom
# Null hypothesis probability = 7.488709e-01
Photon flux (15-150 keV) in 64 sec: 7.87997E-02 ( -0.0228629 0.0231523 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.53114e-07 ( -8.4368e-08 9.84128e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.496832 ( -2.16197 4.26344 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 33.9146 ( -14.6177 14.1898 )
Norm@50keV : 2.37545E-02 ( -0.0237564 16.0099 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.58 using 59 PHA bins.
# Reduced chi-squared = 0.8832 for 55 degrees of freedom
# Null hypothesis probability = 7.169309e-01
Photon flux (15-150 keV) in 64 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] : 8.66438 (-2.28849 2.97434)
R^2/D10^2 : 7.15661E-02 (-0.0715661 0.166372)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.86 using 59 PHA bins.
# Reduced chi-squared = 0.8572 for 57 degrees of freedom
# Null hypothesis probability = 7.699404e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.556e-08 3.904e-08
25- 50 1.312e-07 8.019e-08
50-150 4.448e-08 3.196e-08
15-150 2.412e-07 1.354e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 42.1975 (-19.5483 48.7063)
Norm : 0.523625 (-0.202234 0.338854)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.28 using 59 PHA bins.
# Reduced chi-squared = 0.8822 for 57 degrees of freedom
# Null hypothesis probability = 7.232226e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.829e-08 4.059e-08
25- 50 1.054e-07 6.182e-08
50-150 8.634e-08 6.890e-08
15-150 2.700e-07 1.662e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.79438 (-5.79292 192.236)
R1^2/D10^2 : 0.168387 (-0.16839 -0.16839)
kT2 [keV] : 11.5649 (-11.5603 -11.5603)
R2^2/D10^2 : 1.47057E-02 (-0.0147398 0.195507)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.35 using 59 PHA bins.
# Reduced chi-squared = 0.8792 for 55 degrees of freedom
# Null hypothesis probability = 7.247178e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.217e-08 6.906e-08
25- 50 1.220e-07 1.267e-07
50-150 6.594e-08 7.350e-08
15-150 2.601e-07 2.273e-07
Plot creation:
Mon Apr 21 12:59:43 EDT 2014