batgrbproduct Analysis for Trigger=424161
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): Wed Jun 9 08:40:07 EDT 2010
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger424161/GCN5_download_cron
======================================================================
Trigger: 00424161 Segment: 000
BAT Trigger Time: 297688848 [s; MET]
Trigger Stop: 297690536 [s; MET]
UTC: 2010-06-08T11:20:42.126860 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 296.429520249823 Dec: 27.3659120736822 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 8.03
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.03
Flight Position: [ source = BAT ]
RA: 296.429520249823 Dec: 27.3659120736822 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 296.458007686608 Dec: 27.4832754225102 [deg; J2000]
{ 19h 45m 49.9s , +27d 28' 59.8" }
+/- 7.3551308344038 [arcmin] (estimated 90% radius based on SNR)
+/- 4.53179570400232 [arcmin] (formal 1-sigma fit error)
SNR: 1.75845836822205
Angular difference between Flight and Ground position is 7.203383 arcmin
Partial Coding Fraction: 0.96875 [ including projection effects ]
Duration
T90: 1688 +/-
Measured from: 0
to: 1688 [s; relative to TRIGTIME]
T50: 1688 +/-
Measured from: 0
to: 1688 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 1688 second)
Measured from: 0
to: 1688 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 1688 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.156929 0.136538 0.036649 0.032754
0.090442 0.091960 0.079873 0.067380 [error]
Peak 0.156929 0.136538 0.036649 0.032754
0.090442 0.091960 0.079873 0.067380 [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 5.51e-08 4.89e-08 2.99e-08 2.76e-08 1.46e-07 1.61e-07 erg/cm2
Error 4.58e-08 4.56e-08 5.12e-08 1.55e-07 1.38e-07 2.54e-07 erg/cm2
Peak flux Power-law 6.86e-03 3.35e-03 1.00e-03 3.81e-04 1.14e-02 1.16e-02 ph/cm2/s
Error 4.48e-03 3.06e-03 1.67e-03 1.81e-03 9.42e-03 9.76e-03 ph/cm2/s
Fluence Cutoff-PL 5.52e-08 4.96e-08 2.84e-08 1.78e-08 1.42e-07 1.53e-07 erg/cm2
Error 4.61e-08 5.83e-08 5.12e-08 1.54e-07 1.53e-07 2.53e-07 erg/cm2
Peak flux Cutoff-PL 6.85e-03 3.35e-03 1.00e-03 3.78e-04 1.14e-02 1.16e-02 ph/cm2/s
Error 4.48e-03 3.06e-03 1.67e-03 1.80e-03 9.41e-03 9.75e-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 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 2.715 3.056 - - 5.03e-05 6.18e-05 63.610 57
CPL 1.975 0.000 1.1 0.0 1.56e-04 0.00e+00 63.610 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.744 3.050 - - 4.97e-05 6.16e-05 63.910 57
CPL 1.921 0.000 3.0 0.0 1.82e-04 0.00e+00 63.930 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 1688.000 0.000 1688.000
T90 1688.000 0.000 1688.000
T50 1688.000 0.000 1688.000
Peak 1688.000 0.000 1688.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
296.4580 +27.4833 0.1091 8.3 65.5 0.3977 1.8 TRIG_00424161
------------------------------------------
Foreground time interval of the image:
285.000 303.136 (delta_t = 18.136 [sec])
706.000 723.025 (delta_t = 17.025 [sec])
728.000 963.063 (delta_t = 235.063 [sec])
Background time interval of the image:
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
Multiple GTIs in the spectrum
tstart tstop
285.000000 303.136300
706.000000 723.025200
728.000000 963.063200
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.71543 ( -1.39856 4.71365 )
Norm@50keV : 5.02808E-05 ( -5.03109e-05 7.32033e-05 )
------------------------------------------------------------
# Chi-Squared = 63.61 using 59 PHA bins.
# Reduced chi-squared = 1.116 for 57 degrees of freedom
# Null hypothesis probability = 2.550843e-01
Photon flux (15-150 keV) in 270.2 sec: 1.13432E-02 ( -0.0113432 0.00744274 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.45556e-07 ( -1.15381e-07 1.61577e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
285.000000 303.136300
706.000000 723.025200
728.000000 963.063200
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.97516 ( )
Epeak [keV] : 1.12375 ( )
Norm@50keV : 1.55947E-04 ( )
------------------------------------------------------------
# Chi-Squared = 63.61 using 59 PHA bins.
# Reduced chi-squared = 1.136 for 56 degrees of freedom
# Null hypothesis probability = 2.261579e-01
Photon flux (15-150 keV) in 270.2 sec: 1.13389E-02 ( -0.0113389 0.0074405 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.42412e-07 ( -1.42412e-07 1.64313e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
285.000000 303.136300
706.000000 723.025200
728.000000 963.063200
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -10.00000 ( 2.09434e+06 2.09434e+06 )
beta : -2.71177 ( -4.71106 1.39447 )
Epeak [keV] : 1.91962 ( -1.91962 -1.91962 )
Norm@50keV : 6.85400E-03 ( -0.00685412 0.00993198 )
------------------------------------------------------------
# Chi-Squared = 63.61 using 59 PHA bins.
# Reduced chi-squared = 1.157 for 55 degrees of freedom
# Null hypothesis probability = 1.992041e-01
Photon flux (15-150 keV) in 270.2 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] : 6.61308 (-6.61389 6.66557)
R^2/D10^2 : 2.84291E-02 (-0.0284152 52.8381)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 63.93 using 59 PHA bins.
# Reduced chi-squared = 1.122 for 57 degrees of freedom
# Null hypothesis probability = 2.462100e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.068e-08 3.345e-08
25- 50 6.200e-08 4.850e-08
50-150 8.327e-09 8.890e-09
15-150 1.210e-07 8.648e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 23.8056 (-23.8056 -23.8056)
Norm : 0.114513 (-0.114513 8.40637)
------------------------------------------------------------
# Chi-Squared = 63.63 using 59 PHA bins.
# Reduced chi-squared = 1.116 for 57 degrees of freedom
# Null hypothesis probability = 2.544567e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.484e-08 3.911e-08
25- 50 5.444e-08 4.027e-08
50-150 2.152e-08 2.655e-08
15-150 1.308e-07 9.914e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.30560 (-1.77122 9.76238)
R1^2/D10^2 : 436.220 ( )
kT2 [keV] : 7.94262 (-5.08581 -7.95559)
R2^2/D10^2 : 1.15064E-02 (-0.0112585 1.3593)
------------------------------------------------------------
# Chi-Squared = 63.11 using 59 PHA bins.
# Chi-Squared = 62.95 using 59 PHA bins.
# Reduced chi-squared = 1.148 for 55 degrees of freedom
# Reduced chi-squared = 1.145 for 55 degrees of freedom
# Null hypothesis probability = 2.114507e-01
# Null hypothesis probability = 2.156112e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.008e-08 2.435e-08
25- 50 5.964e-08 4.745e-08
50-150 1.719e-08 1.428e-08
15-150 1.269e-07 8.365e-08
Peak spectrum fit
Power-law model
Time interval is from 728.000 sec. to 963.063 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.74382 ( -1.37318 4.72773 )
Norm@50keV : 4.97092E-05 ( -4.9742e-05 7.3533e-05 )
------------------------------------------------------------
# Chi-Squared = 63.91 using 59 PHA bins.
# Reduced chi-squared = 1.121 for 57 degrees of freedom
# Null hypothesis probability = 2.467517e-01
Photon flux (15-150 keV) in 270.2 sec: 1.14310E-02 ( -0.011431 0.00740278 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.45427e-07 ( -1.15278e-07 1.60959e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 728.000 sec. to 963.063 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.92060 ( )
Epeak [keV] : 3.03640 ( )
Norm@50keV : 1.81726E-04 ( )
------------------------------------------------------------
# Chi-Squared = 63.93 using 59 PHA bins.
# Reduced chi-squared = 1.142 for 56 degrees of freedom
# Null hypothesis probability = 2.180888e-01
Photon flux (15-150 keV) in 270.2 sec: 1.14266E-02 ( -0.0114266 0.0074006 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.45403e-07 ( -1.15288e-07 1.60917e-07 ) ergs/cm2
Band function
Time interval is from 728.000 sec. to 963.063 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.50570 ( 11.9784 11.9784 )
beta : -2.73957 ( -4.72914 1.36861 )
Epeak [keV] : 12.9480 ( -12.948 -12.948 )
Norm@50keV : 6.77981E-03 ( -0.00677982 0.00997382 )
------------------------------------------------------------
# Chi-Squared = 63.91 using 59 PHA bins.
# Reduced chi-squared = 1.162 for 55 degrees of freedom
# Null hypothesis probability = 1.920165e-01
Photon flux (15-150 keV) in 270.2 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] : 6.50133 (-6.50178 6.39442)
R^2/D10^2 : 3.08692E-02 (-0.0308607 87.3341)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 64.32 using 59 PHA bins.
# Reduced chi-squared = 1.128 for 57 degrees of freedom
# Null hypothesis probability = 2.357530e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.211e-08 3.305e-08
25- 50 6.158e-08 4.556e-08
50-150 7.750e-09 8.457e-09
15-150 1.214e-07 8.749e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 23.1559 (-23.1559 -23.1559)
Norm : 0.119007 (-0.119007 9.55532)
------------------------------------------------------------
# Chi-Squared = 63.96 using 59 PHA bins.
# Reduced chi-squared = 1.122 for 57 degrees of freedom
# Null hypothesis probability = 2.455187e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.590e-08 3.730e-08
25- 50 5.446e-08 4.157e-08
50-150 2.064e-08 2.610e-08
15-150 1.310e-07 9.928e-08
Double BB
R1^2/D10^2 : 2.17398E+05 ( )
kT2 [keV] : 7.75373 (-5.0693 -7.96341)
R2^2/D10^2 : 1.31721E-02 ( )
------------------------------------------------------------
# Chi-Squared = 63.39 using 59 PHA bins.
# Chi-Squared = 63.22 using 59 PHA bins.
# Chi-Squared = 63.06 using 59 PHA bins.
# Reduced chi-squared = 1.153 for 55 degrees of freedom
# Reduced chi-squared = 1.149 for 55 degrees of freedom
# Reduced chi-squared = 1.147 for 55 degrees of freedom
# Null hypothesis probability = 2.045959e-01
# Null hypothesis probability = 2.088724e-01
# Null hypothesis probability = 2.127327e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.053e-08 2.544e-08
25- 50 5.963e-08 4.393e-08
50-150 1.734e-08 1.632e-08
15-150 1.275e-07 8.910e-08
Plot creation:
Wed Jun 9 08:55:30 EDT 2010