batgrbproduct Analysis for Trigger=423184
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 page will be updated for up to 8 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Thu May 27 13:53:06 EDT 2010
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger423184/GCN5_download_cron
======================================================================
Trigger: 00423184 Segment: 000
BAT Trigger Time: 296593244.352 [s; MET]
Trigger Stop: 296593271.232 [s; MET]
UTC: 2010-05-26T19:00:38.517680 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 0.699890609018591 Dec: -37.9023721389102 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.89
Image Trigger?: NO
Rate S/N Ratio: 6.92820323027551 [ if not an image trigger ]
Image S/N Ratio: 6.89
Flight Position: [ source = BAT ]
RA: 0.699890609018591 Dec: -37.9023721389102 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 0.725681467206706 Dec: -37.9270988980484 [deg; J2000]
{ 00h 02m 54.2s , -37d 55' 37.6" }
+/- 2.18045855271734 [arcmin] (estimated 90% radius based on SNR)
+/- 1.00561583697099 [arcmin] (formal 1-sigma fit error)
SNR: 9.98800186026444
Angular difference between Flight and Ground position is 1.921327 arcmin
Partial Coding Fraction: 0.953125 [ including projection effects ]
Duration
T90: 66 +/- 14.7648230602334
Measured from: -21.3519998788834
to: 44.6480001211166 [s; relative to TRIGTIME]
T50: 29 +/- 11.3137084989848
Measured from: -7.35199987888336
to: 21.6480001211166 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 2.64800000190735
to: 3.64800000190735 [s; relative to TRIGTIME]
Total Fluence
Measured from: -26.3519999980927
to: 47.6480000019073 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.262706 0.352933 0.227068 0.107918
0.044543 0.045852 0.041254 0.037948 [error]
Peak 0.006128 0.012928 0.017150 0.003934
0.005105 0.005396 0.004999 0.004597 [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 7.07e-08 1.31e-07 1.86e-07 5.58e-07 5.31e-07 9.46e-07 erg/cm2
Error 1.68e-08 1.95e-08 3.95e-08 2.53e-07 9.47e-08 2.87e-07 erg/cm2
Peak flux Power-law 4.66e-02 7.53e-02 9.21e-02 2.22e-01 2.77e-01 4.36e-01 ph/cm2/s
Error 4.67e-02 5.98e-02 3.81e-02 2.51e-01 1.15e-01 2.41e-01 ph/cm2/s
Fluence Cutoff-PL 6.96e-08 1.33e-07 1.87e-07 4.20e-07 5.21e-07 8.08e-07 erg/cm2
Error 1.82e-08 2.41e-08 4.10e-08 4.04e-07 1.08e-07 4.08e-07 erg/cm2
Peak flux Cutoff-PL 4.64e-02 7.53e-02 9.22e-02 2.20e-01 2.77e-01 4.34e-01 ph/cm2/s
Error 4.67e-02 5.98e-02 3.82e-02 2.49e-01 1.15e-01 2.40e-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 1.491 0.266 - - 7.55e-04 1.19e-04 57.120 57
CPL 1.396 0.814 293.7 0.0 8.50e-04 2.01e-03 57.070 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.710 0.896 - - 2.40e-03 1.09e-03 50.450 57
CPL 0.718 0.903 9999.4 0.0 2.42e-03 1.28e-01 50.450 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 74.000 -26.352 47.648
T90 66.000 -21.352 44.648
T50 29.000 -7.352 21.648
Peak 1.000 2.648 3.648
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
0.7257 -37.9271 0.0193 10.3 123.5 1.0165 10.0 TRIG_00423184
------------------------------------------
Foreground time interval of the image:
-26.352 47.648 (delta_t = 74.000 [sec])
Background time interval of the image:
-239.352 -26.352 (delta_t = 213.000 [sec])
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 3) 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.
- 4) 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.
- 5) 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 -26.352 sec. to 47.648 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.49059 ( -0.263535 0.268374 )
Norm@50keV : 7.54880E-04 ( -0.000120382 0.00011823 )
------------------------------------------------------------
# Chi-Squared = 57.12 using 59 PHA bins.
# Reduced chi-squared = 1.002 for 57 degrees of freedom
# Null hypothesis probability = 4.706535e-01
Photon flux (15-150 keV) in 74 sec: 9.40021E-02 ( -0.0138329 0.0138366 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.30748e-07 ( -9.34516e-08 9.59928e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -26.352 sec. to 47.648 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.39616 ( -1.0081 0.620103 )
Epeak [keV] : 293.699 ( )
Norm@50keV : 8.50014E-04 ( -0.000850482 0.00316105 )
------------------------------------------------------------
# Chi-Squared = 57.07 using 59 PHA bins.
# Reduced chi-squared = 1.019 for 56 degrees of freedom
# Null hypothesis probability = 4.351399e-01
Photon flux (15-150 keV) in 74 sec: 9.34345E-02 ( -0.0144462 0.0070945 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.21433e-07 ( -1.12527e-07 1.04101e-07 ) ergs/cm2
Band function
Time interval is from -26.352 sec. to 47.648 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.94523 ( -36.8616 -36.8616 )
beta : -1.65115 ( -0.490472 0.318935 )
Epeak [keV] : 26.2593 ( -26.2514 7.3037 )
Norm@50keV : 55.5712 ( -55.8248 22.9898 )
------------------------------------------------------------
# Chi-Squared = 55.74 using 59 PHA bins.
# Reduced chi-squared = 1.014 for 55 degrees of freedom
# Null hypothesis probability = 4.466864e-01
Photon flux (15-150 keV) in 74 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] : 12.7825 (-2.31075 3.04313)
R^2/D10^2 : 1.84088E-02 (-0.00970371 0.019038)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 67.25 using 59 PHA bins.
# Reduced chi-squared = 1.180 for 57 degrees of freedom
# Null hypothesis probability = 1.661262e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.721e-08 1.300e-08
25- 50 1.596e-07 3.792e-08
50-150 1.633e-07 5.905e-08
15-150 3.701e-07 8.628e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-42.1239 -199.943)
Norm : 0.383371 (-0.0562277 0.0562837)
------------------------------------------------------------
# Chi-Squared = 57.15 using 59 PHA bins.
# Reduced chi-squared = 1.003 for 57 degrees of freedom
# Null hypothesis probability = 4.696887e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.064e-08 3.844e-08
25- 50 1.359e-07 7.492e-08
50-150 2.980e-07 1.663e-07
15-150 5.046e-07 2.779e-07
Double BB
R1^2/D10^2 : 6.82843E-02 ( )
kT2 [keV] : 39.9023 (-26.838 -45.8672)
R2^2/D10^2 : 3.02015E-04 ( )
------------------------------------------------------------
# Chi-Squared = 55.98 using 59 PHA bins.
# Chi-Squared = 55.91 using 59 PHA bins.
# Chi-Squared = 55.90 using 59 PHA bins.
# Reduced chi-squared = 1.018 for 55 degrees of freedom
# Reduced chi-squared = 1.017 for 55 degrees of freedom
# Reduced chi-squared = 1.016 for 55 degrees of freedom
# Null hypothesis probability = 4.378170e-01
# Null hypothesis probability = 4.403821e-01
# Null hypothesis probability = 4.410050e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.816e-08 3.863e-08
25- 50 1.416e-07 8.133e-08
50-150 3.232e-07 2.109e-07
15-150 5.330e-07 3.161e-07
Peak spectrum fit
Power-law model
Time interval is from 2.648 sec. to 3.648 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.709511 ( -0.984624 0.807242 )
Norm@50keV : 2.39899E-03 ( -0.00115226 0.00102755 )
------------------------------------------------------------
# Chi-Squared = 50.45 using 59 PHA bins.
# Reduced chi-squared = 0.8851 for 57 degrees of freedom
# Null hypothesis probability = 7.175999e-01
Photon flux (15-150 keV) in 1 sec: 0.277100 ( -0.114478 0.116261 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.9158e-08 ( -1.24763e-08 1.27099e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.648 sec. to 3.648 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.718175 ( -1.00655 0.800284 )
Epeak [keV] : 9999.36 ( -9999.87 -9999.87 )
Norm@50keV : 2.41959E-03 ( -0.00105753 0.254368 )
------------------------------------------------------------
# Chi-Squared = 50.45 using 59 PHA bins.
# Reduced chi-squared = 0.9009 for 56 degrees of freedom
# Null hypothesis probability = 6.840786e-01
Photon flux (15-150 keV) in 1 sec: 0.276987 ( -0.114429 0.116224 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.91692e-08 ( -1.24833e-08 1.27191e-08 ) ergs/cm2
Band function
Time interval is from 2.648 sec. to 3.648 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.855967 ( 0.855967 0.855967 )
beta : -0.709528 ( 0.709528 0.984462 )
Epeak [keV] : 16.8696 ( -16.8696 -16.8696 )
Norm@50keV : 3.34734E-03 ( -0.00334734 61823.7 )
------------------------------------------------------------
# Chi-Squared = 50.45 using 59 PHA bins.
# Reduced chi-squared = 0.9172 for 55 degrees of freedom
# Null hypothesis probability = 6.489524e-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] : 29.0208 (-12.086 56.3789)
R^2/D10^2 : 4.57750E-03 (-0.00444881 0.017259)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 51.06 using 59 PHA bins.
# Reduced chi-squared = 0.8958 for 57 degrees of freedom
# Null hypothesis probability = 6.962306e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.154e-10 4.588e-10
25- 50 3.744e-09 2.740e-09
50-150 2.255e-08 1.524e-08
15-150 2.691e-08 1.817e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-199.986 -199.986)
Norm : 1.09395 (-0.480059 0.48008)
------------------------------------------------------------
# Chi-Squared = 53.59 using 59 PHA bins.
# Reduced chi-squared = 0.9403 for 57 degrees of freedom
# Null hypothesis probability = 6.036112e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.724e-09 1.748e-09
25- 50 5.240e-09 3.311e-09
50-150 1.149e-08 7.570e-09
15-150 1.946e-08 1.259e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.39745 (-1.85719 66.9063)
R1^2/D10^2 : 3458.99 ( )
kT2 [keV] : 31.9266 (-13.7999 78.0939)
R2^2/D10^2 : 3.47479E-03 (-0.00321536 0.00839737)
------------------------------------------------------------
# Chi-Squared = 49.43 using 59 PHA bins.
# Chi-Squared = 49.32 using 59 PHA bins.
# Reduced chi-squared = 0.8987 for 55 degrees of freedom
# Reduced chi-squared = 0.8968 for 55 degrees of freedom
# Null hypothesis probability = 6.866077e-01
# Null hypothesis probability = 6.904332e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.638e-09 6.745e-10
25- 50 3.319e-09 2.444e-09
50-150 2.370e-08 1.672e-08
15-150 2.866e-08 1.792e-08
Plot creation:
Thu May 27 14:58:38 EDT 2010