batgrbproduct Analysis for Trigger=533568
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 Sep 14 03:13:20 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger533568/GCN5_download_cron
======================================================================
Trigger: 00533568 Segment: 000
BAT Trigger Time: 369260311.552 [s; MET]
Trigger Stop: 369260312.576 [s; MET]
UTC: 2012-09-13T20:18:21.905720 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 146.436815162705 Dec: 26.9767800186672 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.27
Image Trigger?: NO
Rate S/N Ratio: 11.6189500386223 [ if not an image trigger ]
Image S/N Ratio: 7.27
Flight Position: [ source = BAT ]
RA: 146.436815162705 Dec: 26.9767800186672 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 146.400442105042 Dec: 26.9590116249236 [deg; J2000]
{ 09h 45m 36.1s , +26d 57' 32.4" }
+/- 1.24919347865857 [arcmin] (estimated 90% radius based on SNR)
+/- 0.474844512344991 [arcmin] (formal 1-sigma fit error)
SNR: 22.1348171879198
Angular difference between Flight and Ground position is 2.218081 arcmin
Partial Coding Fraction: 0.7109375 [ including projection effects ]
Duration
T90: 30.1439999938011 +/- 4.77485787614619
Measured from: 0.436000108718872
to: 30.58000010252 [s; relative to TRIGTIME]
T50: 5.33999991416931 +/- 13.5959247297632
Measured from: 20.7800001502037
to: 26.120000064373 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 22.4480000138283
to: 23.4480000138283 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.719999969005585
to: 39.8000000119209 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.725768 0.652327 0.311561 0.034825
0.039898 0.040769 0.036171 0.033287 [error]
Peak 0.110767 0.097227 0.051354 0.010176
0.007571 0.007741 0.006573 0.005474 [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 2.25e-07 2.74e-07 2.42e-07 3.69e-07 8.69e-07 1.11e-06 erg/cm2
Error 2.29e-08 2.00e-08 3.36e-08 1.01e-07 7.53e-08 1.39e-07 erg/cm2
Peak flux Power-law 1.05e+00 7.51e-01 3.53e-01 2.33e-01 2.27e+00 2.39e+00 ph/cm2/s
Error 1.30e-01 6.47e-02 5.37e-02 6.71e-02 1.95e-01 2.06e-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 1.02e+00 7.84e-01 3.48e-01 1.34e-01 2.24e+00 2.29e+00 ph/cm2/s
Error 1.42e-01 8.39e-02 5.87e-02 1.17e-01 2.02e-01 2.44e-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 2.32e+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 2.177 0.149 - - 2.29e-03 2.27e-04 70.510 57
CPL 1.769 0.442 22.6 0.0 3.98e-03 0.00e+00 68.970 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.089 0.169 - - 1.45e-02 1.65e-03 50.150 57
CPL 1.717 0.597 30.9 -3.1 2.40e-02 0.00e+00 49.070 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: 26.944000 sec.
T50 in the 50-300 keV band: 20.928000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 40.520 -0.720 39.800
T90 30.144 0.436 30.580
T50 5.340 20.780 26.120
Peak 1.000 22.448 23.448
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
146.4004 +26.9590 0.0087 20.6 -91.6 1.5637 22.1 TRIG_00533568
------------------------------------------
Foreground time interval of the image:
-0.720 30.149 (delta_t = 30.869 [sec])
Background time interval of the image:
-239.552 -0.720 (delta_t = 238.832 [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 -0.720 sec. to 39.800 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.17733 ( -0.146253 0.152739 )
Norm@50keV : 2.28844E-03 ( -0.000228558 0.000224959 )
------------------------------------------------------------
# Chi-Squared = 70.51 using 59 PHA bins.
# Reduced chi-squared = 1.237 for 57 degrees of freedom
# Null hypothesis probability = 1.077958e-01
Photon flux (15-150 keV) in 40.52 sec: 0.374400 ( -0.026874 0.0268866 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.69154e-07 ( -7.46026e-08 7.60297e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.720 sec. to 39.800 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.76906 ( -0.647277 0.236919 )
Epeak [keV] : 22.6258 ( )
Norm@50keV : 3.98042E-03 ( )
------------------------------------------------------------
# Chi-Squared = 68.97 using 59 PHA bins.
# Reduced chi-squared = 1.232 for 56 degrees of freedom
# Null hypothesis probability = 1.142537e-01
Photon flux (15-150 keV) in 40.52 sec: 0.366887 ( -0.028622 0.028647 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from -0.720 sec. to 39.800 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.76904 ( 1.7614 0.470191 )
beta : -10.00000 ( 3.71944e+11 3.71944e+11 )
Epeak [keV] : 22.6217 ( -20.8146 16.031 )
Norm@50keV : 3.97961E-03 ( -0.000930338 0.00556329 )
------------------------------------------------------------
# Chi-Squared = 68.97 using 59 PHA bins.
# Reduced chi-squared = 1.254 for 55 degrees of freedom
# Null hypothesis probability = 9.746377e-02
Photon flux (15-150 keV) in 40.52 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] : 8.89640 (-0.792338 0.872837)
R^2/D10^2 : 0.258354 (-0.0798829 0.116663)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 109.14 using 59 PHA bins.
# Reduced chi-squared = 1.9147 for 57 degrees of freedom
# Null hypothesis probability = 3.971690e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.603e-07 2.071e-08
25- 50 3.346e-07 2.950e-08
50-150 1.232e-07 2.601e-08
15-150 6.182e-07 5.693e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 50.2284 (-9.62035 13.5082)
Norm : 2.08491 (-0.262188 0.328418)
------------------------------------------------------------
# Chi-Squared = 70.35 using 59 PHA bins.
# Reduced chi-squared = 1.234 for 57 degrees of freedom
# Null hypothesis probability = 1.102560e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.068e-07 2.121e-08
25- 50 2.975e-07 2.233e-08
50-150 2.900e-07 6.449e-08
15-150 7.943e-07 7.476e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.89164 (-0.998263 1.09422)
R1^2/D10^2 : 2.00083 (-1.07669 1.72844)
kT2 [keV] : 16.1570 (-3.12095 4.9835)
R2^2/D10^2 : 1.78808E-02 (-0.0120161 0.0295505)
------------------------------------------------------------
# Chi-Squared = 68.48 using 59 PHA bins.
# Reduced chi-squared = 1.245 for 55 degrees of freedom
# Null hypothesis probability = 1.046340e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.195e-07 7.523e-08
25- 50 2.772e-07 8.165e-08
50-150 3.073e-07 1.580e-07
15-150 8.040e-07 2.713e-07
Peak spectrum fit
Power-law model
Time interval is from 22.448 sec. to 23.448 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.08880 ( -0.164669 0.172656 )
Norm@50keV : 1.45150E-02 ( -0.00166866 0.00163679 )
------------------------------------------------------------
# Chi-Squared = 50.15 using 59 PHA bins.
# Reduced chi-squared = 0.8798 for 57 degrees of freedom
# Null hypothesis probability = 7.278647e-01
Photon flux (15-150 keV) in 1 sec: 2.27104 ( -0.194856 0.194902 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.34718e-07 ( -1.39075e-08 1.41791e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 22.448 sec. to 23.448 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.71745 ( -0.705115 0.488846 )
Epeak [keV] : 30.9398 ( -24.8091 -30.9397 )
Norm@50keV : 2.39908E-02 ( )
------------------------------------------------------------
# Chi-Squared = 49.07 using 59 PHA bins.
# Reduced chi-squared = 0.8762 for 56 degrees of freedom
# Null hypothesis probability = 7.325747e-01
Photon flux (15-150 keV) in 1 sec: 2.23711 ( -0.202 0.20203 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.45329e-07 ( -2.7926e-08 5.3735e-08 ) ergs/cm2
Band function
Time interval is from 22.448 sec. to 23.448 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.154468 ( 1.81731 0.67046 )
beta : 10.00000 ( -1.97895e+15 -1.97895e+15 )
Epeak [keV] : 1.64802 ( )
Norm@50keV : 7.10279E-19 ( )
------------------------------------------------------------
# Chi-Squared = 209.89 using 59 PHA bins.
# Reduced chi-squared = 3.8163 for 55 degrees of freedom
# Null hypothesis probability = 6.068760e-20
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] : 9.26887 (-1.03803 1.15389)
R^2/D10^2 : 1.36335 (-0.498364 0.806576)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 82.19 using 59 PHA bins.
# Reduced chi-squared = 1.442 for 57 degrees of freedom
# Null hypothesis probability = 1.613469e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.314e-08 3.500e-09
25- 50 5.146e-08 5.385e-09
50-150 2.147e-08 5.225e-09
15-150 9.606e-08 1.082e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 57.3917 (-13.3085 19.4631)
Norm : 12.0634 (-1.75486 2.01041)
------------------------------------------------------------
# Chi-Squared = 49.99 using 59 PHA bins.
# Reduced chi-squared = 0.8771 for 57 degrees of freedom
# Null hypothesis probability = 7.330717e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.009e-08 3.570e-09
25- 50 4.516e-08 4.425e-09
50-150 4.950e-08 1.206e-08
15-150 1.248e-07 1.280e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.97277 (-0.981156 1.13015)
R1^2/D10^2 : 11.4272 (-6.24055 10.4999)
kT2 [keV] : 17.3742 (-3.56787 5.78165)
R2^2/D10^2 : 8.72783E-02 (-0.0594491 0.138388)
------------------------------------------------------------
# Chi-Squared = 46.86 using 59 PHA bins.
# Reduced chi-squared = 0.8521 for 55 degrees of freedom
# Null hypothesis probability = 7.743765e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.252e-08 1.154e-08
25- 50 4.152e-08 1.295e-08
50-150 5.278e-08 2.936e-08
15-150 1.268e-07 4.840e-08
Plot creation:
Fri Sep 14 09:08:32 EDT 2012