batgrbproduct Analysis for Trigger=506961
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 Nov 4 14:43:06 EDT 2011
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger506961/GCN5_download_cron
======================================================================
Trigger: 00506961 Segment: 000
BAT Trigger Time: 342068120 [s; MET]
Trigger Stop: 342069016 [s; MET]
UTC: 2011-11-04T02:55:12.463460 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 272.114270197828 Dec: -36.9908873128422 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 7.43
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.43
Flight Position: [ source = BAT ]
RA: 272.114270197828 Dec: -36.9908873128422 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 272.049897270893 Dec: -37.0078476223782 [deg; J2000]
{ 18h 08m 12.0s , -37d 00' 28.3" }
+/- 3.66808674121075 [arcmin] (estimated 90% radius based on SNR)
+/- 3.42507804474928 [arcmin] (formal 1-sigma fit error)
SNR: 4.75090228840569
Angular difference between Flight and Ground position is 3.248176 arcmin
Partial Coding Fraction: 0.9921875 [ including projection effects ]
Duration
T90: 896 +/-
Measured from: 0
to: 896 [s; relative to TRIGTIME]
T50: 896 +/-
Measured from: 0
to: 896 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 896 second)
Measured from: 0
to: 896 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 896 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.061001 1.670519 0.310486 0.010191
0.181938 0.169425 0.142778 0.122394 [error]
Peak 2.061001 1.670519 0.310486 0.010191
0.181938 0.169425 0.142778 0.122394 [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 6.53e-07 6.18e-07 4.06e-07 4.15e-07 1.85e-06 2.09e-06 erg/cm2
Error 9.43e-08 8.45e-08 1.15e-07 2.18e-07 2.69e-07 3.90e-07 erg/cm2
Peak flux Power-law 2.41e-02 1.27e-02 4.18e-03 1.77e-03 4.19e-02 4.27e-02 ph/cm2/s
Error 3.56e-03 1.67e-03 1.14e-03 8.73e-04 4.86e-03 4.97e-03 ph/cm2/s
Fluence Cutoff-PL 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 Cutoff-PL 2.27e-02 1.42e-02 3.31e-03 4.04e-02 4.05e-02 0.00e+00 ph/cm2/s
Error 3.95e-03 2.29e-03 1.50e-03 5.00e-03 3.84e-03 0.00e+00 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 2.604 0.270 - - 2.00e-04 4.13e-05 51.170 57
CPL 1.348 1.159 17.7 0.0 1.30e-03 0.00e+00 48.370 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.604 0.270 - - 2.00e-04 4.13e-05 51.170 57
CPL 1.348 1.159 17.7 0.0 1.30e-03 0.00e+00 48.370 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 896.000 0.000 896.000
T90 896.000 0.000 896.000
T50 896.000 0.000 896.000
Peak 896.000 0.000 896.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
272.0499 -37.0078 0.0403 18.7 -154.5 2.9126 4.8 TRIG_00506961
------------------------------------------
Foreground time interval of the image:
0.000 896.000 (delta_t = 896.000 [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 896.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.60448 ( -0.256618 0.2842 )
Norm@50keV : 1.99960E-04 ( -4.12579e-05 4.1335e-05 )
------------------------------------------------------------
# Chi-Squared = 51.17 using 59 PHA bins.
# Reduced chi-squared = 0.8977 for 57 degrees of freedom
# Null hypothesis probability = 6.925157e-01
Photon flux (15-150 keV) in 896 sec: 4.19368E-02 ( -0.00486167 0.00486167 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.84674e-06 ( -2.63145e-07 2.7422e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 896.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.34816 ( -1.66946 0.648348 )
Epeak [keV] : 17.7338 ( )
Norm@50keV : 1.29578E-03 ( )
------------------------------------------------------------
# Chi-Squared = 48.37 using 59 PHA bins.
# Reduced chi-squared = 0.8638 for 56 degrees of freedom
# Null hypothesis probability = 7.557300e-01
Photon flux (15-150 keV) in 896 sec: 4.04458E-02 ( -0.0049753 0.0050236 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 896.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.35418 ( -0.741701 3.89664 )
beta : -9.37166 ( 10 20 )
Epeak [keV] : 17.6655 ( -4.18798 10.6854 )
Norm@50keV : 1.28310E-03 ( -0.00128319 0.00288047 )
------------------------------------------------------------
# Chi-Squared = 48.37 using 59 PHA bins.
# Reduced chi-squared = 0.8795 for 55 degrees of freedom
# Null hypothesis probability = 7.240912e-01
Photon flux (15-150 keV) in 896 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] : 7.13239 (-0.883755 0.977084)
R^2/D10^2 : 7.20520E-02 (-0.030061 0.054217)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 55.73 using 59 PHA bins.
# Reduced chi-squared = 0.9777 for 57 degrees of freedom
# Null hypothesis probability = 5.228462e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.377e-07 1.081e-07
25- 50 7.634e-07 1.391e-07
50-150 1.353e-07 5.799e-08
15-150 1.436e-06 2.361e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 28.2732 (-6.68165 9.49618)
Norm : 0.352852 (-0.0827295 0.115897)
------------------------------------------------------------
# Chi-Squared = 48.39 using 59 PHA bins.
# Reduced chi-squared = 0.8490 for 57 degrees of freedom
# Null hypothesis probability = 7.845108e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.234e-07 9.762e-08
25- 50 6.889e-07 1.094e-07
50-150 3.485e-07 1.516e-07
15-150 1.661e-06 2.679e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.03991 (-2.03187 2.16381)
R1^2/D10^2 : 1.76872 (-1.59741 4541.71)
kT2 [keV] : 9.18286 (-1.93613 4.07489)
R2^2/D10^2 : 2.02710E-02 (-0.0173459 0.0422724)
------------------------------------------------------------
# Chi-Squared = 47.52 using 59 PHA bins.
# Reduced chi-squared = 0.8641 for 55 degrees of freedom
# Null hypothesis probability = 7.528828e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.227e-07 3.212e-07
25- 50 7.095e-07 3.864e-07
50-150 2.679e-07 1.692e-07
15-150 1.600e-06 7.974e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 896.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.60448 ( -0.256618 0.2842 )
Norm@50keV : 1.99960E-04 ( -4.12579e-05 4.1335e-05 )
------------------------------------------------------------
# Chi-Squared = 51.17 using 59 PHA bins.
# Reduced chi-squared = 0.8977 for 57 degrees of freedom
# Null hypothesis probability = 6.925157e-01
Photon flux (15-150 keV) in 896 sec: 4.19368E-02 ( -0.00486167 0.00486167 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.84674e-06 ( -2.63145e-07 2.7422e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 896.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.34816 ( -1.66946 0.648348 )
Epeak [keV] : 17.7338 ( )
Norm@50keV : 1.29578E-03 ( )
------------------------------------------------------------
# Chi-Squared = 48.37 using 59 PHA bins.
# Reduced chi-squared = 0.8638 for 56 degrees of freedom
# Null hypothesis probability = 7.557300e-01
Photon flux (15-150 keV) in 896 sec: 4.04458E-02 ( -0.0049753 0.0050236 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 896.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.35418 ( -0.741701 3.89664 )
beta : -9.37166 ( 10 20 )
Epeak [keV] : 17.6655 ( -4.18798 10.6854 )
Norm@50keV : 1.28310E-03 ( -0.00128319 0.00288047 )
------------------------------------------------------------
# Chi-Squared = 48.37 using 59 PHA bins.
# Reduced chi-squared = 0.8795 for 55 degrees of freedom
# Null hypothesis probability = 7.240912e-01
Photon flux (15-150 keV) in 896 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] : 7.13239 (-0.883755 0.977084)
R^2/D10^2 : 7.20520E-02 (-0.030061 0.054217)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 55.73 using 59 PHA bins.
# Reduced chi-squared = 0.9777 for 57 degrees of freedom
# Null hypothesis probability = 5.228462e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.377e-07 1.144e-07
25- 50 7.634e-07 1.427e-07
50-150 1.353e-07 5.669e-08
15-150 1.436e-06 2.451e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 28.2732 (-6.68165 9.49618)
Norm : 0.352852 (-0.0827295 0.115897)
------------------------------------------------------------
# Chi-Squared = 48.39 using 59 PHA bins.
# Reduced chi-squared = 0.8490 for 57 degrees of freedom
# Null hypothesis probability = 7.845108e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.234e-07 1.066e-07
25- 50 6.889e-07 1.094e-07
50-150 3.485e-07 1.525e-07
15-150 1.661e-06 2.764e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.03991 (-2.03187 2.16381)
R1^2/D10^2 : 1.76872 (-1.59741 4541.71)
kT2 [keV] : 9.18286 (-1.93613 4.07489)
R2^2/D10^2 : 2.02710E-02 (-0.0173459 0.0422724)
------------------------------------------------------------
# Chi-Squared = 47.52 using 59 PHA bins.
# Reduced chi-squared = 0.8641 for 55 degrees of freedom
# Null hypothesis probability = 7.528828e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.227e-07 3.235e-07
25- 50 7.095e-07 3.812e-07
50-150 2.679e-07 1.622e-07
15-150 1.600e-06 8.248e-07
Plot creation:
Fri Nov 4 15:04:19 EDT 2011