batgrbproduct Analysis for Trigger=537195
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): Fri Nov 2 18:53:13 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger537195/batgroup_hand_proc
======================================================================
Trigger: 00537195 Segment: 000
BAT Trigger Time: 373416640.512 [s; MET]
Trigger Stop: 373416641.536 [s; MET]
UTC: 2012-10-31T22:50:30.689560 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 170.770786767707 Dec: -3.51064886408243 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 15.07
Image Trigger?: NO
Rate S/N Ratio: 35.5246393366632 [ if not an image trigger ]
Image S/N Ratio: 15.07
Flight Position: [ source = BAT ]
RA: 170.770786767707 Dec: -3.51064886408243 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 170.776347656912 Dec: -3.51763871376841 [deg; J2000]
{ 11h 23m 06.3s , -03d 31' 03.5" }
+/- 0.977732644025253 [arcmin] (estimated 90% radius based on SNR)
+/- 0.346324099705627 [arcmin] (formal 1-sigma fit error)
SNR: 31.4115700000436
Angular difference between Flight and Ground position is 0.535533 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 226.199999928474 +/- 19.3793890293787
Measured from: -198.367999911308
to: 27.8320000171661 [s; relative to TRIGTIME]
T50: 195.799999952316 +/- 1.58267115966089
Measured from: -187.76399987936
to: 8.03600007295609 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -190.72000002861
to: -189.72000002861 [s; relative to TRIGTIME]
Total Fluence
Measured from: -209.004000008106
to: 98.3079999685287 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.579690 4.946176 3.608919 0.904086
0.101215 0.105920 0.095254 0.085572 [error]
Peak 0.069822 0.099456 0.112613 0.047212
0.007746 0.008811 0.008952 0.007105 [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 1.05e-06 1.93e-06 2.74e-06 8.17e-06 7.83e-06 1.39e-05 erg/cm2
Error 5.82e-08 6.05e-08 9.77e-08 6.76e-07 2.34e-07 7.28e-07 erg/cm2
Peak flux Power-law 5.33e-01 7.20e-01 7.17e-01 1.29e+00 2.39e+00 3.26e+00 ph/cm2/s
Error 9.03e-02 7.24e-02 6.85e-02 2.74e-01 2.00e-01 3.16e-01 ph/cm2/s
Fluence Cutoff-PL 1.03e-06 1.95e-06 2.76e-06 7.24e-06 1.30e-05 0.00e+00 erg/cm2
Error 7.33e-08 6.61e-08 1.03e-07 1.71e-06 1.73e-06 0.00e+00 erg/cm2
Peak flux Cutoff-PL 5.32e-01 7.20e-01 7.18e-01 1.28e+00 2.39e+00 3.25e+00 ph/cm2/s
Error 9.18e-02 7.16e-02 6.25e-02 2.70e-01 1.99e-01 3.15e-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 1.497 0.054 - - 2.69e-03 7.42e-05 40.770 57
CPL 1.416 0.165 381.6 0.0 2.93e-03 5.33e-04 40.340 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.006 0.152 - - 2.07e-02 1.72e-03 42.570 57
CPL 1.001 0.284 9999.3 0.0 2.09e-02 3.77e-03 42.590 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: 215.424000 sec.
T50 in the 50-300 keV band: 196.480000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 307.312 -209.004 98.308
T90 226.200 -198.368 27.832
T50 195.800 -187.764 8.036
Peak 1.000 -190.720 -189.720
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
170.7763 -3.5176 0.0061 4.6263 -31.7970 4.9093829 31.412 TRIG_00537195
Foreground time interval of the image:
-152.211 14.589 (delta_t = 166.800 [sec])
Background time interval of the image:
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 -209.004 sec. to 98.308 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.49718 ( -0.0543057 0.0543591 )
Norm@50keV : 2.68534E-03 ( -7.42529e-05 7.42168e-05 )
------------------------------------------------------------
# Chi-Squared = 40.77 using 59 PHA bins.
# Reduced chi-squared = 0.7153 for 57 degrees of freedom
# Null hypothesis probability = 9.484545e-01
Photon flux (15-150 keV) in 307.3 sec: 0.334982 ( -0.0100045 0.010033 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.83191e-06 ( -2.3382e-07 2.34448e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -209.004 sec. to 98.308 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.41617 ( -0.217596 0.112848 )
Epeak [keV] : 381.619 ( -381.648 -381.648 )
Norm@50keV : 2.93241E-03 ( -0.000306951 0.000759045 )
------------------------------------------------------------
# Chi-Squared = 40.34 using 59 PHA bins.
# Reduced chi-squared = 0.7204 for 56 degrees of freedom
# Null hypothesis probability = 9.430637e-01
Photon flux (15-150 keV) in 307.3 sec: 0.332850 ( -0.011286 0.011257 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.29747e-05 ( -1.91921e-06 1.54713e-06 ) ergs/cm2
Band function
Time interval is from -209.004 sec. to 98.308 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.473047 ( 0.802542 0.802542 )
beta : -1.53550 ( 1.5399 0.0758065 )
Epeak [keV] : 45.3036 ( -45.2124 66.5843 )
Norm@50keV : 1.28101E-02 ( -0.012965 182.261 )
------------------------------------------------------------
# Chi-Squared = 38.45 using 59 PHA bins.
# Reduced chi-squared = 0.6991 for 55 degrees of freedom
# Null hypothesis probability = 9.560050e-01
Photon flux (15-150 keV) in 307.3 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] : 15.9517 ( )
R^2/D10^2 : 2.92042E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 305.95 using 59 PHA bins.
# Reduced chi-squared = 5.3676 for 57 degrees of freedom
# Null hypothesis probability = 9.269002e-36
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.725e-07 2.658e-08
25- 50 1.983e-06 7.283e-08
50-150 3.523e-06 1.951e-07
15-150 5.979e-06 1.798e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.989 ( )
Norm : 1.36737 (-1.36737 -1.36737)
------------------------------------------------------------
# Chi-Squared = 48.57 using 59 PHA bins.
# Reduced chi-squared = 0.8521 for 57 degrees of freedom
# Null hypothesis probability = 7.789754e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.047e-06 5.321e-07
25- 50 2.013e-06 1.018e-06
50-150 4.415e-06 2.245e-06
15-150 7.475e-06 3.794e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.97535 (-0.865745 0.921359)
R1^2/D10^2 : 0.221936 (-0.0646716 0.102621)
kT2 [keV] : 30.9958 (-4.05176 6.0602)
R2^2/D10^2 : 2.34817E-03 (-0.00103858 0.00148124)
------------------------------------------------------------
# Chi-Squared = 49.61 using 59 PHA bins.
# Reduced chi-squared = 0.9019 for 55 degrees of freedom
# Null hypothesis probability = 6.800941e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.889e-07 8.297e-08
25- 50 2.027e-06 1.266e-07
50-150 4.802e-06 5.562e-07
15-150 7.718e-06 5.670e-07
Peak spectrum fit
Power-law model
Time interval is from -190.720 sec. to -189.720 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00630 ( -0.153312 0.151007 )
Norm@50keV : 2.07397E-02 ( -0.00171728 0.00171619 )
------------------------------------------------------------
# Chi-Squared = 42.57 using 59 PHA bins.
# Reduced chi-squared = 0.7468 for 57 degrees of freedom
# Null hypothesis probability = 9.225213e-01
Photon flux (15-150 keV) in 1 sec: 2.38864 ( -0.199727 0.199716 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.23779e-07 ( -2.13781e-08 2.15183e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -190.720 sec. to -189.720 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00080 ( -0.352626 0.214845 )
Epeak [keV] : 9999.34 ( )
Norm@50keV : 2.08626E-02 ( -0.00172458 0.00581608 )
------------------------------------------------------------
# Chi-Squared = 42.59 using 59 PHA bins.
# Reduced chi-squared = 0.7606 for 56 degrees of freedom
# Null hypothesis probability = 9.066853e-01
Photon flux (15-150 keV) in 1 sec: 2.38768 ( -0.19904 0.19982 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.49458e-07 ( -9.1824e-08 1.02871e-07 ) ergs/cm2
Band function
Time interval is from -190.720 sec. to -189.720 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99999 ( -137337 -137337 )
beta : -1.03296 ( -0.174934 0.164458 )
Epeak [keV] : 24.0945 ( -23.105 6.95357 )
Norm@50keV : 1749.32 ( -2261.54 3.86445e+06 )
------------------------------------------------------------
# Chi-Squared = 42.37 using 59 PHA bins.
# Reduced chi-squared = 0.7703 for 55 degrees of freedom
# Null hypothesis probability = 8.937509e-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] : 22.6216 (-2.81005 3.33266)
R^2/D10^2 : 7.70193E-02 (-0.0260841 0.0386497)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 79.91 using 59 PHA bins.
# Reduced chi-squared = 1.402 for 57 degrees of freedom
# Null hypothesis probability = 2.431218e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.200e-09 1.376e-09
25- 50 3.870e-08 5.080e-09
50-150 1.480e-07 2.350e-08
15-150 1.939e-07 2.410e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.997 ( )
Norm : 9.42495 (-9.42495 -9.42495)
------------------------------------------------------------
# Chi-Squared = 77.26 using 59 PHA bins.
# Reduced chi-squared = 1.355 for 57 degrees of freedom
# Null hypothesis probability = 3.825443e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.347e-08 1.246e-08
25- 50 4.514e-08 2.408e-08
50-150 9.900e-08 5.240e-08
15-150 1.676e-07 8.895e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.90109 (-1.66967 2.24296)
R1^2/D10^2 : 2.00200 (-1.20614 3.4383)
kT2 [keV] : 36.5273 (-7.63766 15.7351)
R2^2/D10^2 : 1.63171E-02 (-0.0101552 0.0165055)
------------------------------------------------------------
# Chi-Squared = 40.34 using 59 PHA bins.
# Reduced chi-squared = 0.7334 for 55 degrees of freedom
# Null hypothesis probability = 9.306983e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.808e-08 8.729e-09
25- 50 3.996e-08 1.304e-08
50-150 1.720e-07 6.578e-08
15-150 2.301e-07 7.608e-08
Plot creation:
Fri Nov 2 19:11:05 EDT 2012