batgrbproduct Analysis for Trigger=433509
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): Wed May 11 16:36:01 EDT 2011
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger433509/SDC
======================================================================
Trigger: 00433509 Segment: 000
BAT Trigger Time: 305473773.568 [s; MET]
Trigger Stop: 305473774.08 [s; MET]
UTC: 2010-09-06T13:49:27.416480 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 28.7092893597252 Dec: 55.6138119348437 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.5
Image Trigger?: NO
Rate S/N Ratio: 22.6936114358204 [ if not an image trigger ]
Image S/N Ratio: 10.5
Flight Position: [ source = BAT ]
RA: 28.7092893597252 Dec: 55.6138119348437 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 28.6971138221224 Dec: 55.6336248904067 [deg; J2000]
{ 01h 54m 47.3s , +55d 38' 01.0" }
+/- 0.544594550892894 [arcmin] (estimated 90% radius based on SNR)
+/- 0.186325630944302 [arcmin] (formal 1-sigma fit error)
SNR: 72.4697119162686
Angular difference between Flight and Ground position is 1.258304 arcmin
Partial Coding Fraction: 0.46875 [ including projection effects ]
Duration
T90: 114.343999922276 +/- 1.59114548550629
Measured from: 1.72799998521805
to: 116.071999907494 [s; relative to TRIGTIME]
T50: 55.2519999742508 +/- 8.2312701178889
Measured from: 7.40399998426437
to: 62.6559999585152 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 10.4799999594688
to: 11.4799999594688 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.192000031471252
to: 130.455999970436 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 6.318932 7.102217 4.821575 0.987122
0.075678 0.078173 0.069723 0.053899 [error]
Peak 0.268888 0.421755 0.366653 0.090526
0.012540 0.014280 0.013901 0.009312 [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 2.23e-06 3.35e-06 3.75e-06 7.96e-06 1.17e-05 1.73e-05 erg/cm2
Error 8.48e-08 7.22e-08 8.18e-08 4.04e-07 2.10e-07 4.37e-07 erg/cm2
Peak flux Power-law 3.33e+00 3.36e+00 2.38e+00 2.69e+00 1.01e+01 1.18e+01 ph/cm2/s
Error 2.37e-01 1.47e-01 1.14e-01 2.63e-01 4.18e-01 4.64e-01 ph/cm2/s
Fluence Cutoff-PL 2.13e-06 3.37e-06 3.81e-06 6.46e-06 1.16e-05 1.58e-05 erg/cm2
Error 1.19e-07 7.47e-08 9.46e-08 1.07e-06 2.39e-07 1.12e-06 erg/cm2
Peak flux Cutoff-PL 2.89e+00 3.51e+00 2.55e+00 1.54e+00 9.84e+00 1.05e+01 ph/cm2/s
Error 2.97e-01 1.67e-01 1.38e-01 3.84e-01 4.38e-01 5.96e-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 1.07e+01 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 1.836 0.035 - - 9.77e-03 1.75e-04 59.150 57
CPL 1.655 0.149 108.6 109.4 1.17e-02 1.73e-03 54.740 56
The chi2 of BB fit is which shows a significant improvement in the fit over a PL.
Check the BB fit.
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.496 0.067 - - 8.13e-02 3.22e-03 70.410 57
CPL 0.876 0.294 97.9 26.9 1.60e-01 5.11e-02 55.590 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: 103.488000 sec.
T50 in the 50-300 keV band: 11.648000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 130.648 -0.192 130.456
T90 114.344 1.728 116.072
T50 55.252 7.404 62.656
Peak 1.000 10.480 11.480
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
28.6971 +55.6336 0.0026 40.8 -150.5 7.4778 72.5 TRIG_00433509
------------------------------------------
Foreground time interval of the image:
-0.192 9.933 (delta_t = 10.125 [sec])
Background time interval of the image:
-239.568 -0.192 (delta_t = 239.376 [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 -0.192 sec. to 130.456 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.83578 ( -0.0353643 0.0354389 )
Norm@50keV : 9.76957E-03 ( -0.000174697 0.000174697 )
------------------------------------------------------------
# Chi-Squared = 59.15 using 59 PHA bins.
# Reduced chi-squared = 1.038 for 57 degrees of freedom
# Null hypothesis probability = 3.969975e-01
Photon flux (15-150 keV) in 130.6 sec: 1.36536 ( -0.0311049 0.0312932 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.17345e-05 ( -2.09972e-07 2.09973e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.192 sec. to 130.456 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.65538 ( -0.150848 0.146368 )
Epeak [keV] : 108.553 ( -25.1939 193.688 )
Norm@50keV : 1.17231E-02 ( -0.00157676 0.00188339 )
------------------------------------------------------------
# Chi-Squared = 54.74 using 59 PHA bins.
# Reduced chi-squared = 0.9775 for 56 degrees of freedom
# Null hypothesis probability = 5.226530e-01
Photon flux (15-150 keV) in 130.6 sec: 1.33818 ( -0.03714 0.03755 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15954e-05 ( -2.39638e-07 2.39011e-07 ) ergs/cm2
Band function
Time interval is from -0.192 sec. to 130.456 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.64910 ( -0.169869 0.339623 )
beta : -2.04351 ( 2.03178 0.186673 )
Epeak [keV] : 105.874 ( -52.2679 192.118 )
Norm@50keV : 1.18084E-02 ( -0.00126677 0.00752295 )
------------------------------------------------------------
# Chi-Squared = 54.70 using 59 PHA bins.
# Reduced chi-squared = 0.9946 for 55 degrees of freedom
# Null hypothesis probability = 4.858761e-01
Photon flux (15-150 keV) in 130.6 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] : ( )
R^2/D10^2 : ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : ( )
Norm : ( )
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : ( )
R1^2/D10^2 : ( )
kT2 [keV] : ( )
R2^2/D10^2 : ( )
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Peak spectrum fit
Power-law model
Time interval is from 10.480 sec. to 11.480 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.49568 ( -0.0670227 0.0674129 )
Norm@50keV : 8.13073E-02 ( -0.00321753 0.00321556 )
------------------------------------------------------------
# Chi-Squared = 70.41 using 59 PHA bins.
# Reduced chi-squared = 1.235 for 57 degrees of freedom
# Null hypothesis probability = 1.093072e-01
Photon flux (15-150 keV) in 1 sec: 10.1386 ( -0.418208 0.41882 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.71868e-07 ( -3.27246e-08 3.27901e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 10.480 sec. to 11.480 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.875679 ( -0.303911 0.284801 )
Epeak [keV] : 97.9393 ( -16.187 37.5618 )
Norm@50keV : 0.159595 ( -0.0415995 0.0606899 )
------------------------------------------------------------
# Chi-Squared = 55.59 using 59 PHA bins.
# Reduced chi-squared = 0.9927 for 56 degrees of freedom
# Null hypothesis probability = 4.902547e-01
Photon flux (15-150 keV) in 1 sec: 9.83554 ( -0.43693 0.43826 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.49961e-07 ( -3.4876e-08 3.4772e-08 ) ergs/cm2
Band function
Time interval is from 10.480 sec. to 11.480 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.875638 ( -0.276315 0.301666 )
beta : -10.00000 ( 2.00523e+10 2.00523e+10 )
Epeak [keV] : 97.9213 ( -16.185 37.5565 )
Norm@50keV : 0.159592 ( -0.0416085 0.0607134 )
------------------------------------------------------------
# Chi-Squared = 55.59 using 59 PHA bins.
# Reduced chi-squared = 1.011 for 55 degrees of freedom
# Null hypothesis probability = 4.523142e-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] : ( )
R^2/D10^2 : ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : ( )
Norm : ( )
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : ( )
R1^2/D10^2 : ( )
kT2 [keV] : ( )
R2^2/D10^2 : ( )
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Plot creation:
Thu May 26 13:41:15 EDT 2011