batgrbproduct Analysis for Trigger=528195
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 Jul 22 17:57:06 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger528195/batgroup_hand_proc
======================================================================
Trigger: 00528195 Segment: 000
BAT Trigger Time: 364654416 [s; MET]
Trigger Stop: 364654480 [s; MET]
UTC: 2012-07-22T12:53:26.546400 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 230.491264214896 Dec: 13.2503098737037 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.9
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.9
Flight Position: [ source = BAT ]
RA: 230.491264214896 Dec: 13.2503098737037 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 230.489107292613 Dec: 13.2491045116393 [deg; J2000]
{ 15h 21m 57.4s , +13d 14' 56.8" }
+/- 3.44699455602715 [arcmin] (estimated 90% radius based on SNR)
+/- 1.96199311796771 [arcmin] (formal 1-sigma fit error)
SNR: 5.19213645685185
Angular difference between Flight and Ground position is 0.145255 arcmin
Partial Coding Fraction: 0.1953125 [ including projection effects ]
Duration
T90: 42.4480000138283 +/- 10.4672441118585
Measured from: 1.15200001001358
to: 43.6000000238419 [s; relative to TRIGTIME]
T50: 14.5440000295639 +/- 4.81773387783073
Measured from: 12.5120000243187
to: 27.0560000538826 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 24.0199999809265
to: 25.0199999809265 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.336000025272369
to: 47.5360000133514 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.766823 0.635952 0.536672 0.090102
0.083185 0.083483 0.074680 0.067297 [error]
Peak 0.044745 0.042122 0.018716 0.022281
0.012434 0.011891 0.010910 0.008796 [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 2.52e-07 3.63e-07 3.88e-07 7.72e-07 1.24e-06 1.77e-06 erg/cm2
Error 4.99e-08 4.47e-08 7.82e-08 3.25e-07 1.77e-07 3.95e-07 erg/cm2
Peak flux Power-law 4.54e-01 3.48e-01 1.79e-01 1.32e-01 1.04e+00 1.11e+00 ph/cm2/s
Error 2.28e-01 1.11e-01 8.87e-02 1.32e-01 3.39e-01 3.53e-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 4.54e-01 3.48e-01 1.79e-01 1.31e-01 1.04e+00 1.11e+00 ph/cm2/s
Error 2.27e-01 1.11e-01 7.20e-02 1.54e-01 3.35e-01 3.52e-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 1.903 0.246 - - 2.82e-03 4.07e-04 57.050 57
CPL 2.151 0.000 64.0 0.0 2.06e-03 0.00e+00 56.400 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.963 0.660 - - 7.07e-03 2.72e-03 61.120 57
CPL 2.165 0.000 69.7 0.0 5.22e-03 0.00e+00 60.750 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: 43.968000 sec.
T50 in the 50-300 keV band: 14.336000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 47.872 -0.336 47.536
T90 42.448 1.152 43.600
T50 14.544 12.512 27.056
Peak 1.000 24.020 25.020
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
230.4891 13.2491 0.0371 47.0186 155.2062 1.8367800 5.192 TRIG_00528195
Foreground time interval of the image:
-0.336 47.536 (delta_t = 47.872 [sec])
Background time interval of the image:
-12.099 -0.336 (delta_t = 11.763 [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 -0.336 sec. to 47.536 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.90268 ( -0.237872 0.253683 )
Norm@50keV : 2.82359E-03 ( -0.000414603 0.000400008 )
------------------------------------------------------------
# Chi-Squared = 57.05 using 59 PHA bins.
# Reduced chi-squared = 1.001 for 57 degrees of freedom
# Null hypothesis probability = 4.734090e-01
Photon flux (15-150 keV) in 47.87 sec: 0.405676 ( -0.0510977 0.051279 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.24269e-06 ( -1.75985e-07 1.78199e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.336 sec. to 47.536 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.15052 ( )
Epeak [keV] : 63.9891 ( )
Norm@50keV : 2.05854E-03 ( )
------------------------------------------------------------
# Chi-Squared = 56.40 using 59 PHA bins.
# Reduced chi-squared = 1.007 for 56 degrees of freedom
# Null hypothesis probability = 4.598260e-01
Photon flux (15-150 keV) in 47.87 sec: 0.405700 ( -0.051322 0.051014 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from -0.336 sec. to 47.536 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -2.64860 ( 0.822496 2.6486 )
beta : -1.90269 ( -0.253677 0.237898 )
Epeak [keV] : 101.464 ( -101.464 -101.464 )
Norm@50keV : 0.383765 ( -0.0563499 0.0543673 )
------------------------------------------------------------
# Chi-Squared = 57.05 using 59 PHA bins.
# Reduced chi-squared = 1.037 for 55 degrees of freedom
# Null hypothesis probability = 3.989578e-01
Photon flux (15-150 keV) in 47.87 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] : 12.9214 (-2.35904 2.77398)
R^2/D10^2 : 6.88812E-02 (-0.0345939 0.0751572)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 87.78 using 59 PHA bins.
# Reduced chi-squared = 1.540 for 57 degrees of freedom
# Null hypothesis probability = 5.486218e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.168e-07 2.879e-08
25- 50 3.995e-07 7.516e-08
50-150 4.202e-07 1.157e-07
15-150 9.365e-07 1.843e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 99.8318 (-36.7761 83.4408)
Norm : 1.74977 (-0.296221 0.389464)
------------------------------------------------------------
# Chi-Squared = 60.18 using 59 PHA bins.
# Reduced chi-squared = 1.056 for 57 degrees of freedom
# Null hypothesis probability = 3.615069e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.189e-07 3.585e-08
25- 50 3.784e-07 5.539e-08
50-150 6.127e-07 1.216e-07
15-150 1.210e-06 1.898e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.04180 (-0.891544 1.2207)
R1^2/D10^2 : 5.53185 (-3.92816 14.5745)
kT2 [keV] : 21.2011 (-4.38169 6.59928)
R2^2/D10^2 : 9.61355E-03 (-0.00593854 0.0128764)
------------------------------------------------------------
# Chi-Squared = 52.67 using 59 PHA bins.
# Reduced chi-squared = 0.9576 for 55 degrees of freedom
# Null hypothesis probability = 5.641644e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.921e-07 1.453e-07
25- 50 2.954e-07 1.006e-07
50-150 6.759e-07 3.167e-07
15-150 1.263e-06 4.307e-07
Peak spectrum fit
Power-law model
Time interval is from 24.020 sec. to 25.020 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.96292 ( -0.600249 0.718833 )
Norm@50keV : 7.06616E-03 ( -0.00287496 0.00255734 )
------------------------------------------------------------
# Chi-Squared = 61.12 using 59 PHA bins.
# Reduced chi-squared = 1.072 for 57 degrees of freedom
# Null hypothesis probability = 3.302878e-01
Photon flux (15-150 keV) in 1 sec: 1.04227 ( -0.339612 0.339058 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.5054e-08 ( -2.34271e-08 2.37523e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 24.020 sec. to 25.020 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.16456 ( )
Epeak [keV] : 69.6500 ( )
Norm@50keV : 5.21976E-03 ( )
------------------------------------------------------------
# Chi-Squared = 60.75 using 59 PHA bins.
# Reduced chi-squared = 1.085 for 56 degrees of freedom
# Null hypothesis probability = 3.087525e-01
Photon flux (15-150 keV) in 1 sec: 1.04184 ( -0.338241 0.33103 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.98565e-08 ( -4.56002e-08 5.84505e-08 ) ergs/cm2
Band function
Time interval is from 24.020 sec. to 25.020 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99999 ( -139963 -139963 )
beta : -2.06646 ( -1.03979 0.671147 )
Epeak [keV] : 21.3297 ( -21.2599 10.1995 )
Norm@50keV : 3186.81 ( -3261.23 1.77698e+07 )
------------------------------------------------------------
# Chi-Squared = 60.88 using 59 PHA bins.
# Reduced chi-squared = 1.107 for 55 degrees of freedom
# Null hypothesis probability = 2.727414e-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] : 8.39804 (-2.88412 4.08812)
R^2/D10^2 : 0.918417 (-0.917286 4.12241)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 64.87 using 59 PHA bins.
# Reduced chi-squared = 1.138 for 57 degrees of freedom
# Null hypothesis probability = 2.215210e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.211e-08 7.490e-09
25- 50 2.303e-08 1.403e-08
50-150 7.076e-09 5.710e-09
15-150 4.222e-08 2.747e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 82.9823 (-83.5754 -83.5754)
Norm : 4.71267 (-1.97818 5.81321)
------------------------------------------------------------
# Chi-Squared = 62.46 using 59 PHA bins.
# Reduced chi-squared = 1.096 for 57 degrees of freedom
# Null hypothesis probability = 2.885584e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.225e-08 7.865e-09
25- 50 2.035e-08 1.274e-08
50-150 2.943e-08 2.393e-08
15-150 6.204e-08 4.371e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.12659 (-2.60157 3.51215)
R1^2/D10^2 : 1.63266 ( )
kT2 [keV] : 99.6651 (-73.1487 -99.7051)
R2^2/D10^2 : 2.87836E-04 (-0.000204657 0.00811032)
------------------------------------------------------------
# Chi-Squared = 58.62 using 59 PHA bins.
# Chi-Squared = 58.58 using 59 PHA bins.
# Reduced chi-squared = 1.066 for 55 degrees of freedom
# Reduced chi-squared = 1.065 for 55 degrees of freedom
# Null hypothesis probability = 3.440897e-01
# Null hypothesis probability = 3.456114e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.389e-08 8.295e-09
25- 50 2.040e-08 1.267e-08
50-150 3.256e-08 1.953e-08
15-150 6.685e-08 3.467e-08
Plot creation:
Sun Jul 22 18:11:58 EDT 2012