batgrbproduct Analysis for Trigger=572308
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): Sun Sep 29 23:48:45 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger572308/GCN5_download_cron
======================================================================
Trigger: 00572308 Segment: 000
BAT Trigger Time: 402140204.224 [s; MET]
Trigger Stop: 402140205.248 [s; MET]
UTC: 2013-09-29T09:36:33.134240 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 135.069036940592 Dec: -47.5650235881594 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.91
Image Trigger?: NO
Rate S/N Ratio: 11.916375287813 [ if not an image trigger ]
Image S/N Ratio: 7.91
Flight Position: [ source = BAT ]
RA: 135.069036940592 Dec: -47.5650235881594 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 135.028080391519 Dec: -47.5540459889067 [deg; J2000]
{ 09h 00m 06.7s , -47d 33' 14.6" }
+/- 1.61182549542339 [arcmin] (estimated 90% radius based on SNR)
+/- 0.730262238916768 [arcmin] (formal 1-sigma fit error)
SNR: 15.3797677947877
Angular difference between Flight and Ground position is 1.784323 arcmin
Partial Coding Fraction: 0.4453125 [ including projection effects ]
Duration
T90: 11.1040000319481 +/- 2.9843860103448
Measured from: -1.47999984025955
to: 9.62400019168854 [s; relative to TRIGTIME]
T50: 3.93600004911423 +/- 1.07569508586547
Measured from: 0.104000151157379
to: 4.04000020027161 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.32400000095367
to: 2.32400000095367 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.92799997329712
to: 11.4960000514984 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.390731 0.521775 0.247882 -0.028026
0.036417 0.039974 0.038758 0.040905 [error]
Peak 0.074881 0.061959 0.037414 0.013394
0.010391 0.011580 0.011052 0.010857 [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 1.53e-07 2.08e-07 2.09e-07 3.79e-07 6.93e-07 9.49e-07 erg/cm2
Error 2.05e-08 2.03e-08 3.57e-08 1.27e-07 8.22e-08 1.67e-07 erg/cm2
Peak flux Power-law 7.73e-01 5.60e-01 2.68e-01 1.82e-01 1.69e+00 1.78e+00 ph/cm2/s
Error 1.89e-01 1.01e-01 9.10e-02 1.18e-01 2.98e-01 3.25e-01 ph/cm2/s
Fluence Cutoff-PL 1.40e-07 2.33e-07 1.98e-07 8.42e-08 6.31e-07 6.56e-07 erg/cm2
Error 2.33e-08 2.81e-08 4.34e-08 1.25e-07 8.93e-08 1.45e-07 erg/cm2
Peak flux Cutoff-PL 7.79e-01 5.59e-01 2.65e-01 1.77e-01 1.69e+00 1.77e+00 ph/cm2/s
Error 1.89e-01 1.07e-01 6.98e-02 1.32e-01 2.97e-01 3.34e-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 1.997 0.182 - - 5.60e-03 6.96e-04 52.600 57
CPL 0.990 0.855 41.7 13.2 2.13e-02 3.38e-02 47.320 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.060 0.370 - - 1.09e-02 2.78e-03 76.360 57
CPL 2.072 0.000 99.1 0.0 1.06e-02 0.00e+00 76.320 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: 8.576000 sec.
T50 in the 50-300 keV band: 3.584000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 13.424 -1.928 11.496
T90 11.104 -1.480 9.624
T50 3.936 0.104 4.040
Peak 1.000 1.324 2.324
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
135.0281 -47.5540 0.0125 42.6 1.7 1.2254 15.4 TRIG_00572308
------------------------------------------
Foreground time interval of the image:
-1.928 11.496 (delta_t = 13.424 [sec])
Background time interval of the image:
-119.224 -57.189 (delta_t = 62.035 [sec])
-56.224 -1.928 (delta_t = 54.296 [sec])
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 -1.928 sec. to 11.496 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.99653 ( -0.177372 0.187379 )
Norm@50keV : 5.59800E-03 ( -0.000703208 0.000689569 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.60 using 59 PHA bins.
# Reduced chi-squared = 0.9229 for 57 degrees of freedom
# Null hypothesis probability = 6.405505e-01
Photon flux (15-150 keV) in 13.42 sec: 0.838361 ( -0.0808364 0.0808459 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.92672e-07 ( -8.12131e-08 8.31042e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.928 sec. to 11.496 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.990252 ( -0.942111 0.768138 )
Epeak [keV] : 41.6649 ( -11.7738 14.7096 )
Norm@50keV : 2.12948E-02 ( -0.0134567 0.0541173 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.32 using 59 PHA bins.
# Reduced chi-squared = 0.8449 for 56 degrees of freedom
# Null hypothesis probability = 7.891226e-01
Photon flux (15-150 keV) in 13.42 sec: 0.807169 ( -0.083472 0.083711 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.30996e-07 ( -8.62544e-08 9.23283e-08 ) ergs/cm2
Band function
Time interval is from -1.928 sec. to 11.496 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.990376 ( -0.583537 1.17823 )
beta : -10.0000 ( 10 1.77636e-15 )
Epeak [keV] : 41.6571 ( -11.7482 11.958 )
Norm@50keV : 2.12901E-02 ( -0.0134542 0.0540182 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.32 using 59 PHA bins.
# Reduced chi-squared = 0.8603 for 55 degrees of freedom
# Null hypothesis probability = 7.597349e-01
Photon flux (15-150 keV) in 13.42 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] : 10.0212 (-1.10773 1.24287)
R^2/D10^2 : 0.389364 (-0.139311 0.218449)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.55 using 59 PHA bins.
# Reduced chi-squared = 1.080 for 57 degrees of freedom
# Null hypothesis probability = 3.165457e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.069e-07 1.792e-08
25- 50 2.667e-07 2.959e-08
50-150 1.401e-07 3.876e-08
15-150 5.137e-07 6.502e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 64.9943 (-16.679 25.8001)
Norm : 4.25980 (-0.624166 0.721975)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.75 using 59 PHA bins.
# Reduced chi-squared = 0.8378 for 57 degrees of freedom
# Null hypothesis probability = 8.035406e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.454e-07 1.798e-08
25- 50 2.266e-07 2.436e-08
50-150 2.750e-07 7.421e-08
15-150 6.469e-07 8.837e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.55743 (-2.02251 2.13529)
R1^2/D10^2 : 2.21626 (-1.4379 10.4554)
kT2 [keV] : 16.0746 (-3.98738 8.35922)
R2^2/D10^2 : 4.54895E-02 (-0.0383231 0.0567349)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.06 using 59 PHA bins.
# Reduced chi-squared = 0.8556 for 55 degrees of freedom
# Null hypothesis probability = 7.680872e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.410e-07 7.589e-08
25- 50 2.287e-07 1.043e-07
50-150 2.551e-07 1.407e-07
15-150 6.248e-07 3.226e-07
Peak spectrum fit
Power-law model
Time interval is from 1.324 sec. to 2.324 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.05989 ( -0.347847 0.392686 )
Norm@50keV : 1.09337E-02 ( -0.00284516 0.00270516 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.36 using 59 PHA bins.
# Reduced chi-squared = 1.340 for 57 degrees of freedom
# Null hypothesis probability = 4.438560e-02
Photon flux (15-150 keV) in 1 sec: 1.68689 ( -0.297703 0.297729 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.01228e-07 ( -2.3027e-08 2.41803e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.324 sec. to 2.324 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.07196 ( -1.99908 -1.99908 )
Epeak [keV] : 99.0592 ( )
Norm@50keV : 1.06335E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.32 using 59 PHA bins.
# Reduced chi-squared = 1.363 for 56 degrees of freedom
# Null hypothesis probability = 3.685524e-02
Photon flux (15-150 keV) in 1 sec: 1.68526 ( -0.29712 0.29742 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.00447e-07 ( -2.38883e-08 2.4703e-08 ) ergs/cm2
Band function
Time interval is from 1.324 sec. to 2.324 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.74976 ( -4.74976 -4.74976 )
beta : -2.21888 ( -0.585301 0.42852 )
Epeak [keV] : 21.2490 ( -21.249 5.72077 )
Norm@50keV : 3540.39 ( -621.329 2.01218e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.56 using 59 PHA bins.
# Reduced chi-squared = 1.374 for 55 degrees of freedom
# Null hypothesis probability = 3.436508e-02
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] : 7.32819 (-1.54642 2.25155)
R^2/D10^2 : 2.52690 (-1.62304 4.06608)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 85.58 using 59 PHA bins.
# Reduced chi-squared = 1.501 for 57 degrees of freedom
# Null hypothesis probability = 8.494128e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.281e-08 8.324e-09
25- 50 3.408e-08 1.282e-08
50-150 6.646e-09 4.199e-09
15-150 6.353e-08 2.007e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 56.9000 (-25.8648 68.2195)
Norm : 8.99070 (-2.52915 4.0696)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.01 using 59 PHA bins.
# Reduced chi-squared = 1.369 for 57 degrees of freedom
# Null hypothesis probability = 3.374889e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.239e-08 6.030e-09
25- 50 3.351e-08 7.930e-09
50-150 3.646e-08 1.933e-08
15-150 9.237e-08 2.913e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.82538 (-1.59931 1.96782)
R1^2/D10^2 : 5.65654 (-3.76858 14.3036)
kT2 [keV] : 37.6707 (-22.2986 -37.9732)
R2^2/D10^2 : 4.79986E-03 (-0.00448804 0.0859189)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.13 using 59 PHA bins.
# Reduced chi-squared = 1.348 for 55 degrees of freedom
# Null hypothesis probability = 4.372488e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.533e-08 1.385e-08
25- 50 2.896e-08 1.612e-08
50-150 5.625e-08 3.537e-08
15-150 1.105e-07 5.154e-08
Plot creation:
Mon Sep 30 00:23:04 EDT 2013