batgrbproduct Analysis for Trigger=424040
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): Mon Jun 7 13:01:29 EDT 2010
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger424040/GCN5_download_cron
======================================================================
Trigger: 00424040 Segment: 000
BAT Trigger Time: 297554321.984 [s; MET]
Trigger Stop: 297554323.008 [s; MET]
UTC: 2010-06-06T21:58:36.115640 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 178.251592004387 Dec: 22.332343507047 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.52
Image Trigger?: NO
Rate S/N Ratio: 19.3390796058137 [ if not an image trigger ]
Image S/N Ratio: 6.52
Flight Position: [ source = BAT ]
RA: 178.251592004387 Dec: 22.332343507047 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 178.250882041684 Dec: 22.4541996173604 [deg; J2000]
{ 11h 53m 00.2s , +22d 27' 15.1" }
+/- 4.00671881409551 [arcmin] (estimated 90% radius based on SNR)
+/- 2.25806766687295 [arcmin] (formal 1-sigma fit error)
SNR: 4.18785300621236
Angular difference between Flight and Ground position is 7.311473 arcmin
Partial Coding Fraction: 0.890625 [ including projection effects ]
Duration
T90: 1.02399998903275 +/-
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
T50: 1.02399998903275 +/-
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 1.02399998903275 second)
Measured from: 2.98023223876953e-08
to: 1.02400001883507 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.000033 0.008927 0.024392 0.045237
0.007672 0.009028 0.008936 0.010924 [error]
Peak 0.000033 0.008927 0.024392 0.045237
0.007672 0.009028 0.008936 0.010924 [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 5.89e-11 8.46e-10 1.12e-08 1.27e-06 5.48e-08 1.29e-06 erg/cm2
Error 4.90e-10 2.50e-09 1.10e-08 4.86e-07 3.44e-08 4.92e-07 erg/cm2
Peak flux Power-law 1.74e-03 1.30e-02 8.58e-02 2.97e+00 3.05e-01 3.07e+00 ph/cm2/s
Error 1.48e-02 4.20e-02 8.85e-02 1.15e+00 2.25e-01 1.21e+00 ph/cm2/s
Fluence Cutoff-PL 4.10e-11 6.70e-10 1.01e-08 1.44e-06 5.31e-08 1.45e-06 erg/cm2
Error 4.52e-10 2.49e-09 1.09e-08 5.53e-07 3.44e-08 5.59e-07 erg/cm2
Peak flux Cutoff-PL 1.20e-03 1.02e-02 7.73e-02 3.32e+00 2.90e-01 3.41e+00 ph/cm2/s
Error 1.36e-02 4.01e-02 8.79e-02 1.30e+00 2.23e-01 1.35e+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 -1.593 1.008 - - 1.03e-03 1.84e-03 46.080 57
CPL -3.881 0.000 5182.0 -148.3 8.73e-05 0.00e+00 44.760 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -1.596 1.004 - - 1.03e-03 1.83e-03 46.320 57
CPL -2.614 1.585 10000.0 0.0 3.47e-04 1.59e-03 45.520 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 1.024 0.000 1.024
T90 1.024 0.000 1.024
T50 1.024 0.000 1.024
Peak 1.024 0.000 1.024
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
178.2509 +22.4542 0.0459 24.8 174.9 0.0773 4.2 TRIG_00424040
------------------------------------------
Foreground time interval of the image:
0.000 1.024 (delta_t = 1.024 [sec])
Background time interval of the image:
-60.984 -17.200 (delta_t = 43.784 [sec])
-15.984 -9.984 (delta_t = 6.000 [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 0.000 sec. to 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.59255 ( -0.55971 1.45655 )
Norm@50keV : 1.02942E-03 ( -0.00100749 0.00266263 )
------------------------------------------------------------
# Chi-Squared = 46.08 using 59 PHA bins.
# Reduced chi-squared = 0.8085 for 57 degrees of freedom
# Null hypothesis probability = 8.491164e-01
Photon flux (15-150 keV) in 1.024 sec: 0.303930 ( -0.184423 0.265499 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.48017e-08 ( -3.25301e-08 3.62673e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -3.88142 ( )
Epeak [keV] : 5182.03 ( -704.746 -1001.43 )
Norm@50keV : 8.72832E-05 ( )
------------------------------------------------------------
# Chi-Squared = 44.76 using 59 PHA bins.
# Reduced chi-squared = 0.7992 for 56 degrees of freedom
# Null hypothesis probability = 8.596819e-01
Photon flux (15-150 keV) in 1.024 sec: 0.289325 ( -0.173486 0.272285 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.31097e-08 ( -3.12233e-08 3.75554e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.75479 ( -1.75351 -1.75351 )
beta : 1.72538 ( -1.55808 0.426721 )
Epeak [keV] : 15.4472 ( -15.4519 -15.4519 )
Norm@50keV : 2.73927E-03 ( 26.3199 -0.00274237 )
------------------------------------------------------------
# Chi-Squared = 45.98 using 59 PHA bins.
# Reduced chi-squared = 0.8360 for 55 degrees of freedom
# Null hypothesis probability = 8.016151e-01
Photon flux (15-150 keV) in 1.024 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] : 199.363 (-200 -200)
R^2/D10^2 : 2.54292E-04 (-8.69352e-05 0.00156865)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 47.41 using 59 PHA bins.
# Reduced chi-squared = 0.8318 for 57 degrees of freedom
# Null hypothesis probability = 8.134173e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.333e-10 6.011e-11
25- 50 2.832e-09 7.096e-10
50-150 6.895e-08 9.201e-09
15-150 7.211e-08 2.227e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 1.26317 ( )
Norm : 5.83857E+04 ( )
------------------------------------------------------------
# Chi-Squared = 70.00 using 59 PHA bins.
# Reduced chi-squared = 1.228 for 57 degrees of freedom
# Null hypothesis probability = 1.157128e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.577e-10 7.726e-11
25- 50 3.652e-12 3.153e-14
50-150 1.044e-17 5.740e-21
15-150 6.614e-10 1.960e-11
Double BB
R1^2/D10^2 : 2.90781E+04 ( )
kT2 [keV] : 199.363 (-200 -200)
R2^2/D10^2 : 2.53493E-04 (-8.6876e-05 0.000905835)
------------------------------------------------------------
# Chi-Squared = 47.70 using 59 PHA bins.
# Chi-Squared = 47.18 using 59 PHA bins.
# Chi-Squared = 47.00 using 59 PHA bins.
# Reduced chi-squared = 0.8673 for 55 degrees of freedom
# Reduced chi-squared = 0.8578 for 55 degrees of freedom
# Reduced chi-squared = 0.8545 for 55 degrees of freedom
# Null hypothesis probability = 7.470064e-01
# Null hypothesis probability = 7.642828e-01
# Null hypothesis probability = 7.700900e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.59625 ( -0.554317 1.45425 )
Norm@50keV : 1.02732E-03 ( -0.00100577 0.00266307 )
------------------------------------------------------------
# Chi-Squared = 46.32 using 59 PHA bins.
# Reduced chi-squared = 0.8127 for 57 degrees of freedom
# Null hypothesis probability = 8.429564e-01
Photon flux (15-150 keV) in 1.024 sec: 0.304788 ( -0.18428 0.265624 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.49587e-08 ( -3.25022e-08 3.62885e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.61396 ( -2.04672 1.12253 )
Epeak [keV] : 10000.00 ( )
Norm@50keV : 3.47371E-04 ( -0.000347403 0.00283714 )
------------------------------------------------------------
# Chi-Squared = 45.52 using 59 PHA bins.
# Reduced chi-squared = 0.8128 for 56 degrees of freedom
# Null hypothesis probability = 8.403825e-01
Photon flux (15-150 keV) in 1.024 sec: 0.290110 ( -0.173321 0.272426 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.32537e-08 ( -3.11896e-08 3.75825e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.63329 ( -1.82908 -1.82908 )
beta : -2.42006 ( -1.55157 0.424896 )
Epeak [keV] : 9972.23 ( -1148.4 -1148.4 )
Norm@50keV : 3.44722E-04 ( -0.000345113 0.00492293 )
------------------------------------------------------------
# Chi-Squared = 45.49 using 59 PHA bins.
# Reduced chi-squared = 0.8272 for 55 degrees of freedom
# Null hypothesis probability = 8.159352e-01
Photon flux (15-150 keV) in 1.024 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] : 199.314 ( )
R^2/D10^2 : 2.53824E-04 (-8.68662e-05 0.00155453)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 47.67 using 59 PHA bins.
# Reduced chi-squared = 0.8363 for 57 degrees of freedom
# Null hypothesis probability = 8.060597e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.461e-10 4.177e-10
25- 50 2.919e-09 3.159e-09
50-150 6.898e-08 4.998e-08
15-150 7.224e-08 5.402e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 1.26541 ( )
Norm : 5.73480E+04 ( )
------------------------------------------------------------
# Chi-Squared = 70.44 using 59 PHA bins.
# Reduced chi-squared = 1.236 for 57 degrees of freedom
# Null hypothesis probability = 1.087549e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.618e-10 6.072e-11
25- 50 3.707e-12 2.209e-14
50-150 1.082e-17 7.962e-21
15-150 6.655e-10 2.976e-11
Double BB
R1^2/D10^2 : 9248.15 ( )
kT2 [keV] : 199.363 (-200 -200)
R2^2/D10^2 : 2.54486E-04 (-8.68614e-05 0.00127764)
------------------------------------------------------------
# Chi-Squared = 47.95 using 59 PHA bins.
# Chi-Squared = 47.44 using 59 PHA bins.
# Chi-Squared = 47.27 using 59 PHA bins.
# Reduced chi-squared = 0.8719 for 55 degrees of freedom
# Reduced chi-squared = 0.8626 for 55 degrees of freedom
# Reduced chi-squared = 0.8595 for 55 degrees of freedom
# Null hypothesis probability = 7.384090e-01
# Null hypothesis probability = 7.556322e-01
# Null hypothesis probability = 7.611993e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Plot creation:
Mon Jun 7 13:18:06 EDT 2010