batgrbproduct Analysis for Trigger=557910
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 Jun 11 19:42:17 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger557910/GCN5_download_cron
======================================================================
Trigger: 00557910 Segment: 000
BAT Trigger Time: 392612928 [s; MET]
Trigger Stop: 392613576 [s; MET]
UTC: 2013-06-11T03:08:37.339780 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 256.093142103249 Dec: -42.7200217284812 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 8.58
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.58
Flight Position: [ source = BAT ]
RA: 256.093142103249 Dec: -42.7200217284812 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 256.188007064508 Dec: -42.5127526639543 [deg; J2000]
{ 17h 04m 45.1s , -42d 30' 45.9" }
+/- 15.6725662323637 [arcmin] (estimated 90% radius based on SNR)
+/- 19.5540864222434 [arcmin] (formal 1-sigma fit error)
SNR: 0.596726548599231
Angular difference between Flight and Ground position is 13.122603 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 648 +/-
Measured from: 0
to: 648 [s; relative to TRIGTIME]
T50: 648 +/-
Measured from: 0
to: 648 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 648 second)
Measured from: 0
to: 648 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 648 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.023046 0.076215 0.004858 -0.067978
0.045685 0.043389 0.037460 0.033513 [error]
Peak 0.023046 0.076215 0.004858 -0.067978
0.045685 0.043389 0.037460 0.033513 [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 1.11e-08 1.32e-08 1.14e-08 1.69e-08 4.17e-08 4.98e-08 erg/cm2
Error 1.39e-08 1.58e-08 1.92e-08 2.60e-07 5.54e-08 2.62e-07 erg/cm2
Peak flux Power-law 3.25e-03 2.16e-03 9.33e-04 5.54e-04 6.62e-03 6.89e-03 ph/cm2/s
Error 4.14e-03 2.56e-03 1.52e-03 5.46e-03 7.71e-03 8.15e-03 ph/cm2/s
Fluence Cutoff-PL 1.47e-08 3.18e-08 9.79e-10 3.44e-15 4.74e-08 4.75e-08 erg/cm2
Error 1.59e-08 2.51e-08 1.12e-08 2.01e-09 3.51e-08 3.53e-08 erg/cm2
Peak flux Cutoff-PL 4.04e-03 5.49e-03 9.82e-05 1.70e-10 9.62e-03 9.64e-03 ph/cm2/s
Error 4.47e-03 4.43e-03 9.79e-04 9.34e-05 7.03e-03 7.05e-03 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 9.53e-03 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 2.210 0.000 - - 3.98e-05 5.37e-05 58.590 57
CPL -5.285 0.000 31.4 0.0 4.62e+00 0.00e+00 55.710 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.210 0.000 - - 3.98e-05 5.37e-05 58.590 57
CPL -5.285 0.000 31.4 0.0 4.62e+00 0.00e+00 55.710 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 648.000 0.000 648.000
T90 648.000 0.000 648.000
T50 648.000 0.000 648.000
Peak 648.000 0.000 648.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
256.1880 -42.5128 0.3207 4.7 142.5 0.0547 0.6 TRIG_00557910
------------------------------------------
Foreground time interval of the image:
0.000 49.271 (delta_t = 49.271 [sec])
60.000 122.000 (delta_t = 62.000 [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
Multiple GTIs in the spectrum
tstart tstop
0.000000 49.270500
60.000000 122.000000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.21015 ( -2.21015 -2.21015 )
Norm@50keV : 3.97518E-05 ( -3.97519e-05 6.75763e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.59 using 59 PHA bins.
# Reduced chi-squared = 1.028 for 57 degrees of freedom
# Null hypothesis probability = 4.169603e-01
Photon flux (15-150 keV) in 111.3 sec: 6.61615E-03 ( -0.00661615 0.00879726 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.16616e-08 ( -4.16616e-08 6.90639e-08 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 49.270500
60.000000 122.000000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -5.28491 ( )
Epeak [keV] : 31.3580 ( )
Norm@50keV : 4.61897 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.71 using 59 PHA bins.
# Reduced chi-squared = 0.9949 for 56 degrees of freedom
# Null hypothesis probability = 4.856811e-01
Photon flux (15-150 keV) in 111.3 sec: 9.61852E-03 ( -0.00701963 0.00704858 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.7438e-08 ( -3.45723e-08 3.56296e-08 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 49.270500
60.000000 122.000000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -14.2197 -5 )
beta : -9.36449 ( 9.37165 19.3546 )
Epeak [keV] : 31.4401 ( -11.3796 18.1682 )
Norm@50keV : 3.28026 ( -3.44224 109.11 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.69 using 59 PHA bins.
# Reduced chi-squared = 1.013 for 55 degrees of freedom
# Null hypothesis probability = 4.486852e-01
Photon flux (15-150 keV) in 111.3 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] : 8.02177 (-3.94339 9.85167)
R^2/D10^2 : 1.13328E-02 (-0.0113863 0.126354)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.57 using 59 PHA bins.
# Reduced chi-squared = 0.9924 for 57 degrees of freedom
# Null hypothesis probability = 4.912412e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.471e-08 1.068e-08
25- 50 2.586e-08 1.896e-08
50-150 6.852e-09 7.552e-09
15-150 4.742e-08 4.121e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 35.3555 (-36.8804 -36.8804)
Norm : 5.52753E-02 (-0.0551101 -0.0551101)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.92 using 59 PHA bins.
# Reduced chi-squared = 1.016 for 57 degrees of freedom
# Null hypothesis probability = 4.410148e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.350e-08 1.061e-08
25- 50 1.678e-08 1.347e-08
50-150 1.128e-08 1.738e-08
15-150 4.156e-08 4.208e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.17935 (-8.0791 -8.0791)
R1^2/D10^2 : 1.48493E-03 (-0.00169099 -0.00169099)
kT2 [keV] : 8.06786 (-8.0254 -8.0254)
R2^2/D10^2 : 9.46347E-03 (-0.00974872 -0.00974872)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.57 using 59 PHA bins.
# Reduced chi-squared = 1.029 for 55 degrees of freedom
# Null hypothesis probability = 4.161817e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.451e-08 3.147e-02
25- 50 2.585e-08 2.809e-01
50-150 7.023e-09 6.450e+00
15-150 4.738e-08 7.663e+00
Peak spectrum fit
Power-law model
Time interval is from 60.000 sec. to 122.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.21015 ( -2.21015 -2.21015 )
Norm@50keV : 3.97518E-05 ( -3.97519e-05 6.75763e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.59 using 59 PHA bins.
# Reduced chi-squared = 1.028 for 57 degrees of freedom
# Null hypothesis probability = 4.169603e-01
Photon flux (15-150 keV) in 111.3 sec: 6.61615E-03 ( -0.00661615 0.00879726 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.16616e-08 ( -4.16616e-08 6.90639e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 60.000 sec. to 122.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -5.28491 ( )
Epeak [keV] : 31.3580 ( )
Norm@50keV : 4.61897 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.71 using 59 PHA bins.
# Reduced chi-squared = 0.9949 for 56 degrees of freedom
# Null hypothesis probability = 4.856811e-01
Photon flux (15-150 keV) in 111.3 sec: 9.61852E-03 ( -0.00701963 0.00704858 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.7438e-08 ( -3.45723e-08 3.56296e-08 ) ergs/cm2
Band function
Time interval is from 60.000 sec. to 122.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -7.34729 -5 )
beta : -9.36449 ( 9.37165 19.3546 )
Epeak [keV] : 31.4401 ( -11.3796 18.1682 )
Norm@50keV : 3.28026 ( -3.44224 109.11 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.69 using 59 PHA bins.
# Reduced chi-squared = 1.013 for 55 degrees of freedom
# Null hypothesis probability = 4.486852e-01
Photon flux (15-150 keV) in 111.3 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] : 8.02177 (-3.94715 9.85172)
R^2/D10^2 : 1.13328E-02 (-0.0113863 0.126354)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.57 using 59 PHA bins.
# Reduced chi-squared = 0.9924 for 57 degrees of freedom
# Null hypothesis probability = 4.912412e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.471e-08 1.037e-08
25- 50 2.586e-08 1.967e-08
50-150 6.852e-09 7.546e-09
15-150 4.742e-08 4.174e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 35.3555 (-36.8804 -36.8804)
Norm : 5.52753E-02 (-0.0551101 -0.0551101)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.92 using 59 PHA bins.
# Reduced chi-squared = 1.016 for 57 degrees of freedom
# Null hypothesis probability = 4.410148e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.350e-08 9.906e-09
25- 50 1.678e-08 1.406e-08
50-150 1.128e-08 1.745e-08
15-150 4.156e-08 3.316e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.17935 (-8.0791 -8.0791)
R1^2/D10^2 : 1.48493E-03 (-0.00169099 -0.00169099)
kT2 [keV] : 8.06786 (-8.0254 -8.0254)
R2^2/D10^2 : 9.46347E-03 (-0.00974872 -0.00974872)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.57 using 59 PHA bins.
# Reduced chi-squared = 1.029 for 55 degrees of freedom
# Null hypothesis probability = 4.161817e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.451e-08 2.886e-02
25- 50 2.585e-08 2.929e-01
50-150 7.023e-09 6.467e+00
15-150 4.738e-08 7.685e+00
Plot creation:
Tue Jun 11 19:48:21 EDT 2013