batgrbproduct Analysis for Trigger=424031
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 11:47:43 EDT 2010
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger424031/GCN5_download_cron
======================================================================
Trigger: 00424031 Segment: 000
BAT Trigger Time: 297544367.68 [s; MET]
Trigger Stop: 297544368.704 [s; MET]
UTC: 2010-06-06T19:12:41.811980 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 350.602673888059 Dec: -66.2356003010438 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.64
Image Trigger?: NO
Rate S/N Ratio: 46.9361268108053 [ if not an image trigger ]
Image S/N Ratio: 10.64
Flight Position: [ source = BAT ]
RA: 350.602673888059 Dec: -66.2356003010438 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 350.61722184765 Dec: -66.2342463508433 [deg; J2000]
{ 23h 22m 28.1s , -66d 14' 03.3" }
+/- 1.10698193664817 [arcmin] (estimated 90% radius based on SNR)
+/- 0.457594793239318 [arcmin] (formal 1-sigma fit error)
SNR: 26.3063427242015
Angular difference between Flight and Ground position is 0.361018 arcmin
Partial Coding Fraction: 0.25 [ including projection effects ]
Duration
T90: 480 +/- 144
Measured from: 0.320000112056732
to: 480.320000112057 [s; relative to TRIGTIME]
T50: 64 +/- 16
Measured from: 0.320000112056732
to: 64.3200001120567 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 7.81999999284744
to: 8.81999999284744 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.319999992847443
to: 672.319999992847 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.062365 2.816795 2.844275 1.330597
0.155327 0.158959 0.143873 0.135725 [error]
Peak 0.481811 0.981532 1.187914 0.580453
0.057854 0.058929 0.056026 0.053004 [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 7.23e-07 1.46e-06 2.29e-06 7.98e-06 6.39e-06 1.25e-05 erg/cm2
Error 8.34e-08 9.71e-08 1.45e-07 1.19e-06 3.62e-07 1.25e-06 erg/cm2
Peak flux Power-law 3.28e-01 4.70e-01 5.02e-01 9.93e-01 1.61e+00 2.29e+00 ph/cm2/s
Error 1.88e-01 1.62e-01 1.06e-01 5.19e-01 3.95e-01 5.13e-01 ph/cm2/s
Fluence Cutoff-PL 7.22e-07 1.46e-06 2.30e-06 7.92e-06 6.39e-06 1.19e-05 erg/cm2
Error 8.34e-08 9.72e-08 1.45e-07 1.18e-06 3.62e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 3.27e-01 4.70e-01 5.02e-01 9.87e-01 1.61e+00 2.29e+00 ph/cm2/s
Error 1.88e-01 1.62e-01 1.06e-01 5.17e-01 3.95e-01 5.11e-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 1.347 0.103 - - 9.72e-04 5.28e-05 42.740 57
CPL 1.342 0.104 9999.3 0.0 9.76e-04 2.82e-04 42.800 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.907 0.452 - - 1.40e-02 3.46e-03 32.450 57
CPL 0.913 0.594 9999.4 0.0 1.42e-02 1.09e-02 32.460 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: 57.792000 sec.
T50 in the 50-300 keV band: 27.328000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 672.000 0.320 672.320
T90 480.000 0.320 480.320
T50 64.000 0.320 64.320
Peak 1.000 7.820 8.820
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
350.6172 -66.2342 0.0073 48.9 -154.3 3.0588 26.3 TRIG_00424031
------------------------------------------
Foreground time interval of the image:
0.320 13.321 (delta_t = 13.001 [sec])
Background time interval of the image:
-239.680 -175.630 (delta_t = 64.050 [sec])
-174.680 0.320 (delta_t = 175.000 [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 0.320 sec. to 672.320 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.34698 ( -0.103683 0.102829 )
Norm@50keV : 9.72344E-04 ( -5.28597e-05 5.27806e-05 )
------------------------------------------------------------
# Chi-Squared = 42.74 using 59 PHA bins.
# Reduced chi-squared = 0.7498 for 57 degrees of freedom
# Null hypothesis probability = 9.196901e-01
Photon flux (15-150 keV) in 672 sec: 0.117067 ( -0.00704582 0.00707789 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.38608e-06 ( -3.61701e-07 3.62877e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.320 sec. to 672.320 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.34191 ( -0.102963 0.104915 )
Epeak [keV] : 9999.34 ( -9958.32 -9958.32 )
Norm@50keV : 9.75959E-04 ( -0.000332415 0.000231435 )
------------------------------------------------------------
# Chi-Squared = 42.80 using 59 PHA bins.
# Reduced chi-squared = 0.7643 for 56 degrees of freedom
# Null hypothesis probability = 9.026707e-01
Photon flux (15-150 keV) in 672 sec: 0.117009 ( -0.007043 0.007074 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.38732e-06 ( -3.61859e-07 3.63055e-07 ) ergs/cm2
Band function
Time interval is from 0.320 sec. to 672.320 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.05145 ( 1.05168 1.05168 )
beta : -1.34673 ( -0.102943 0.103537 )
Epeak [keV] : 48.4234 ( -48.1784 -48.1784 )
Norm@50keV : 1.86153E-03 ( -0.00186292 812.154 )
------------------------------------------------------------
# Chi-Squared = 42.74 using 59 PHA bins.
# Reduced chi-squared = 0.7771 for 55 degrees of freedom
# Null hypothesis probability = 8.857834e-01
Photon flux (15-150 keV) in 672 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] : 19.8294 ( )
R^2/D10^2 : 5.09158E-03 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 147.46 using 59 PHA bins.
# Reduced chi-squared = 2.5871 for 57 degrees of freedom
# Null hypothesis probability = 6.000442e-10
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.602e-07 4.996e-08
25- 50 1.289e-06 1.962e-07
50-150 3.752e-06 3.367e-07
15-150 5.302e-06 4.845e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.994 ( )
Norm : 0.494193 (-0.494193 -0.494193)
------------------------------------------------------------
# Chi-Squared = 64.00 using 59 PHA bins.
# Reduced chi-squared = 1.123 for 57 degrees of freedom
# Null hypothesis probability = 2.443946e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.271e-07 4.267e-07
25- 50 1.591e-06 8.158e-07
50-150 3.489e-06 1.801e-06
15-150 5.908e-06 3.025e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.25435 (-0.962132 1.58271)
R1^2/D10^2 : 0.186600 (-0.103545 0.178612)
kT2 [keV] : 31.1370 (-4.073 8.34857)
R2^2/D10^2 : 1.00913E-03 (-0.00051953 0.000590284)
------------------------------------------------------------
# Chi-Squared = 44.89 using 59 PHA bins.
# Reduced chi-squared = 0.8161 for 55 degrees of freedom
# Null hypothesis probability = 8.329489e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.907e-07 1.931e-07
25- 50 1.382e-06 3.713e-07
50-150 4.325e-06 1.795e-06
15-150 6.497e-06 2.286e-06
Peak spectrum fit
Power-law model
Time interval is from 7.820 sec. to 8.820 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.906850 ( -0.482835 0.421494 )
Norm@50keV : 1.40131E-02 ( -0.00358999 0.00332491 )
------------------------------------------------------------
# Chi-Squared = 32.45 using 59 PHA bins.
# Reduced chi-squared = 0.5692 for 57 degrees of freedom
# Null hypothesis probability = 9.963765e-01
Photon flux (15-150 keV) in 1 sec: 1.60846 ( -0.390712 0.399266 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.5685e-07 ( -3.35724e-08 3.36786e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 7.820 sec. to 8.820 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.912956 ( -0.775272 0.412896 )
Epeak [keV] : 9999.36 ( -9992.32 -9992.32 )
Norm@50keV : 1.41523E-02 ( -0.0032669 0.0186154 )
------------------------------------------------------------
# Chi-Squared = 32.46 using 59 PHA bins.
# Reduced chi-squared = 0.5797 for 56 degrees of freedom
# Null hypothesis probability = 9.950523e-01
Photon flux (15-150 keV) in 1 sec: 1.60769 ( -0.39054 0.39907 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.56896e-07 ( -3.359e-08 3.3701e-08 ) ergs/cm2
Band function
Time interval is from 7.820 sec. to 8.820 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.802747 ( 0.80274 0.80274 )
beta : -0.906836 ( 0.906815 0.482828 )
Epeak [keV] : 20.8643 ( -20.8606 -20.8606 )
Norm@50keV : 2.19625E-02 ( -0.0109952 3123.67 )
------------------------------------------------------------
# Chi-Squared = 32.45 using 59 PHA bins.
# Reduced chi-squared = 0.5899 for 55 degrees of freedom
# Null hypothesis probability = 9.933957e-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] : 29.2473 (-8.99678 19.2215)
R^2/D10^2 : 2.37499E-02 (-0.0177218 0.0502987)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 38.91 using 59 PHA bins.
# Reduced chi-squared = 0.6826 for 57 degrees of freedom
# Null hypothesis probability = 9.680208e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.228e-09 1.722e-09
25- 50 1.970e-08 1.062e-08
50-150 1.202e-07 6.019e-08
15-150 1.431e-07 6.729e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.999 ( )
Norm : 7.13564 (-7.13564 -7.13564)
------------------------------------------------------------
# Chi-Squared = 40.06 using 59 PHA bins.
# Reduced chi-squared = 0.7029 for 57 degrees of freedom
# Null hypothesis probability = 9.567087e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.777e-08 1.003e-08
25- 50 3.418e-08 1.900e-08
50-150 7.496e-08 4.234e-08
15-150 1.269e-07 7.175e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.6387 (-5.20347 8.61741)
R1^2/D10^2 : 0.406390 (-0.432445 7.07272)
kT2 [keV] : 131.074 (-57.389 -88.305)
R2^2/D10^2 : 6.89338E-04 ( )
------------------------------------------------------------
# Chi-Squared = 31.46 using 59 PHA bins.
# Chi-Squared = 31.45 using 59 PHA bins.
# Reduced chi-squared = 0.5720 for 55 degrees of freedom
# Reduced chi-squared = 0.5717 for 55 degrees of freedom
# Null hypothesis probability = 9.955218e-01
# Null hypothesis probability = 9.955520e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.070e-08 6.720e-09
25- 50 3.008e-08 1.791e-08
50-150 1.195e-07 7.085e-08
15-150 1.603e-07 8.780e-08
Plot creation:
Mon Jun 7 12:15:17 EDT 2010