batgrbproduct Analysis for Trigger=533268
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): Tue Sep 11 19:40:16 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger533268/GCN5_download_cron
======================================================================
Trigger: 00533268 Segment: 000
BAT Trigger Time: 369040123.392 [s; MET]
Trigger Stop: 369040124.416 [s; MET]
UTC: 2012-09-11T07:08:33.754960 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 357.960763192049 Dec: 63.0987077305092 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.79
Image Trigger?: NO
Rate S/N Ratio: 20.7846096908265 [ if not an image trigger ]
Image S/N Ratio: 11.79
Flight Position: [ source = BAT ]
RA: 357.960763192049 Dec: 63.0987077305092 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 357.966555517108 Dec: 63.0904405527618 [deg; J2000]
{ 23h 51m 52.0s , +63d 05' 25.6" }
+/- 1.56161853267149 [arcmin] (estimated 90% radius based on SNR)
+/- 0.875737735557045 [arcmin] (formal 1-sigma fit error)
SNR: 16.0909887373654
Angular difference between Flight and Ground position is 0.520365 arcmin
Partial Coding Fraction: 0.2363281 [ including projection effects ]
Duration
T90: 21.4439999461174 +/- 3.90618173445525
Measured from: -1.17999988794327
to: 20.2640000581741 [s; relative to TRIGTIME]
T50: 5.77999997138977 +/- 7.82722961209613
Measured from: 0.448000073432922
to: 6.22800004482269 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.300000011920929
to: 0.699999988079071 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.84400004148483
to: 24.0999999642372 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.544040 0.803711 0.379571 0.209477
0.056395 0.058065 0.050625 0.042694 [error]
Peak 0.079044 0.160952 0.075832 0.021439
0.012887 0.014402 0.011691 0.008434 [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 1.83e-07 2.95e-07 3.60e-07 8.63e-07 1.08e-06 1.70e-06 erg/cm2
Error 2.60e-08 2.73e-08 4.80e-08 2.35e-07 1.14e-07 2.80e-07 erg/cm2
Peak flux Power-law 9.68e-01 9.00e-01 5.80e-01 5.77e-01 2.69e+00 3.03e+00 ph/cm2/s
Error 1.78e-01 1.12e-01 8.74e-02 1.64e-01 3.28e-01 3.64e-01 ph/cm2/s
Fluence Cutoff-PL 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 Cutoff-PL 7.81e-01 1.12e+00 6.12e-01 9.51e-02 2.60e+00 2.61e+00 ph/cm2/s
Error 2.13e-01 1.77e-01 1.20e-01 3.38e-01 3.49e-01 0.00e+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 1.713 0.159 - - 4.52e-03 4.53e-04 57.430 57
CPL 1.064 0.798 63.9 -23.7 1.04e-02 1.43e-02 55.080 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.634 0.182 - - 2.07e-02 2.57e-03 75.090 57
CPL -0.278 1.366 52.9 12.9 2.38e-01 9.06e-01 65.590 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: 4.160000 sec.
T50 in the 50-300 keV band: 2.112000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 25.944 -1.844 24.100
T90 21.444 -1.180 20.264
T50 5.780 0.448 6.228
Peak 1.000 -0.300 0.700
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
357.9666 +63.0904 0.0120 34.1 99.9 2.0007 16.1 TRIG_00533268
------------------------------------------
Foreground time interval of the image:
-1.844 24.100 (delta_t = 25.944 [sec])
Background time interval of the image:
-85.991 -1.844 (delta_t = 84.147 [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 -1.844 sec. to 24.100 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.71310 ( -0.157382 0.160886 )
Norm@50keV : 4.51852E-03 ( -0.000455698 0.000450465 )
------------------------------------------------------------
# Chi-Squared = 57.43 using 59 PHA bins.
# Reduced chi-squared = 1.008 for 57 degrees of freedom
# Null hypothesis probability = 4.591980e-01
Photon flux (15-150 keV) in 25.94 sec: 0.602883 ( -0.0561298 0.0561762 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.08414e-06 ( -1.13596e-07 1.14849e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.844 sec. to 24.100 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.06413 ( -0.895186 0.699996 )
Epeak [keV] : 63.8871 ( -16.552 -63.9219 )
Norm@50keV : 1.03794E-02 ( -0.00600709 0.0225984 )
------------------------------------------------------------
# Chi-Squared = 55.08 using 59 PHA bins.
# Reduced chi-squared = 0.9835 for 56 degrees of freedom
# Null hypothesis probability = 5.097698e-01
Photon flux (15-150 keV) in 25.94 sec: 0.588757 ( -0.05873 0.058477 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from -1.844 sec. to 24.100 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.18713 ( -1.3689 -0.157875 )
beta : -2.04761 ( -0.630608 0.355412 )
Epeak [keV] : 35.4407 ( -15.1018 25.5267 )
Norm@50keV : 0.352658 ( -0.369496 99.7361 )
------------------------------------------------------------
# Chi-Squared = 51.03 using 59 PHA bins.
# Reduced chi-squared = 0.9277 for 55 degrees of freedom
# Null hypothesis probability = 6.271844e-01
Photon flux (15-150 keV) in 25.94 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] : 11.4875 (-1.16144 1.3284)
R^2/D10^2 : 0.174716 (-0.0586943 0.0854258)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 70.32 using 59 PHA bins.
# Reduced chi-squared = 1.234 for 57 degrees of freedom
# Null hypothesis probability = 1.106334e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.259e-07 2.036e-08
25- 50 3.759e-07 4.345e-08
50-150 2.894e-07 6.864e-08
15-150 7.912e-07 9.455e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 116.021 (-19.3942 84.9116)
Norm : 2.59844 (-0.300476 0.358338)
------------------------------------------------------------
# Chi-Squared = 55.17 using 59 PHA bins.
# Reduced chi-squared = 0.9679 for 57 degrees of freedom
# Null hypothesis probability = 5.441192e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.758e-07 2.218e-08
25- 50 3.126e-07 3.178e-08
50-150 5.486e-07 8.573e-08
15-150 1.037e-06 1.219e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.06149 (-1.72251 1.37461)
R1^2/D10^2 : 0.359191 (-0.126048 0.248578)
kT2 [keV] : 51.2305 (-55.0877 -83.0867)
R2^2/D10^2 : 6.10599E-04 (-0.000190644 0.00382257)
------------------------------------------------------------
# Chi-Squared = 48.89 using 59 PHA bins.
# Reduced chi-squared = 0.8890 for 55 degrees of freedom
# Null hypothesis probability = 7.057380e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.539e-07 3.424e-08
25- 50 3.535e-07 8.707e-08
50-150 5.299e-07 2.701e-07
15-150 1.037e-06 3.424e-07
Peak spectrum fit
Power-law model
Time interval is from -0.300 sec. to 0.700 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.63372 ( -0.180563 0.18303 )
Norm@50keV : 2.06926E-02 ( -0.00257974 0.00256416 )
------------------------------------------------------------
# Chi-Squared = 75.09 using 59 PHA bins.
# Reduced chi-squared = 1.317 for 57 degrees of freedom
# Null hypothesis probability = 5.445314e-02
Photon flux (15-150 keV) in 1 sec: 2.68760 ( -0.327929 0.328308 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.92777e-07 ( -2.51181e-08 2.52932e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.300 sec. to 0.700 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.278055 ( -1.58263 1.14988 )
Epeak [keV] : 52.8879 ( -8.04023 17.7444 )
Norm@50keV : 0.238317 ( -0.239276 1.5728 )
------------------------------------------------------------
# Chi-Squared = 65.59 using 59 PHA bins.
# Reduced chi-squared = 1.171 for 56 degrees of freedom
# Null hypothesis probability = 1.784534e-01
Photon flux (15-150 keV) in 1 sec: 2.59983 ( -0.3387 0.33644 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.64853e-07 ( -2.5273e-08 2.6937e-08 ) ergs/cm2
Band function
Time interval is from -0.300 sec. to 0.700 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.25509 ( -1.54051 -1.27773 )
beta : -2.54356 ( -1.32485 0.575729 )
Epeak [keV] : 45.2948 ( -12.4648 11.9969 )
Norm@50keV : 0.986200 ( -1.10163 164.403 )
------------------------------------------------------------
# Chi-Squared = 61.71 using 59 PHA bins.
# Reduced chi-squared = 1.122 for 55 degrees of freedom
# Null hypothesis probability = 2.487572e-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] : 12.4632 (-1.35349 1.55168)
R^2/D10^2 : 0.638029 (-0.228184 0.338393)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 67.69 using 59 PHA bins.
# Reduced chi-squared = 1.188 for 57 degrees of freedom
# Null hypothesis probability = 1.570924e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.101e-08 4.585e-09
25- 50 6.907e-08 1.045e-08
50-150 6.611e-08 1.656e-08
15-150 1.562e-07 2.435e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 133.530 (-13.6513 -100.583)
Norm : 11.5749 (-1.60121 1.86342)
------------------------------------------------------------
# Chi-Squared = 70.96 using 59 PHA bins.
# Reduced chi-squared = 1.245 for 57 degrees of freedom
# Null hypothesis probability = 1.010737e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.998e-08 4.850e-09
25- 50 5.460e-08 6.795e-09
50-150 1.025e-07 1.813e-08
15-150 1.871e-07 2.380e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.9655 (-1.37525 1.68229)
R1^2/D10^2 : 0.933039 (-0.35714 0.573985)
kT2 [keV] : 199.836 ( )
R2^2/D10^2 : 1.90005E-04 (-8.71521e-05 0.00595728)
------------------------------------------------------------
# Chi-Squared = 58.64 using 59 PHA bins.
# Chi-Squared = 58.18 using 59 PHA bins.
# Reduced chi-squared = 1.066 for 55 degrees of freedom
# Reduced chi-squared = 1.058 for 55 degrees of freedom
# Null hypothesis probability = 3.433477e-01
# Null hypothesis probability = 3.590116e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.365e-08 6.445e-09
25- 50 6.776e-08 1.916e-08
50-150 9.628e-08 4.568e-08
15-150 1.877e-07 5.539e-08
Plot creation:
Tue Sep 11 20:24:09 EDT 2012