batgrbproduct Analysis for Trigger=534402
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 Sep 23 15:09:06 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger534402/GCN5_download_cron
======================================================================
Trigger: 00534402 Segment: 000
BAT Trigger Time: 370070175.936 [s; MET]
Trigger Stop: 370070202.816 [s; MET]
UTC: 2012-09-23T05:16:06.255540 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 303.795001229187 Dec: 6.23473100874495 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.88
Image Trigger?: NO
Rate S/N Ratio: 10.6770782520313 [ if not an image trigger ]
Image S/N Ratio: 8.88
Flight Position: [ source = BAT ]
RA: 303.795001229187 Dec: 6.23473100874495 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 303.784508438723 Dec: 6.25573458390114 [deg; J2000]
{ 20h 15m 08.3s , +06d 15' 20.6" }
+/- 1.99653408780294 [arcmin] (estimated 90% radius based on SNR)
+/- 1.01727173444667 [arcmin] (formal 1-sigma fit error)
SNR: 11.3279578277147
Angular difference between Flight and Ground position is 1.407056 arcmin
Partial Coding Fraction: 0.796875 [ including projection effects ]
Duration
T90: 27.2159999608994 +/- 6.82356414870415
Measured from: -1.2639998793602
to: 25.9520000815392 [s; relative to TRIGTIME]
T50: 14.727999985218 +/- 4.80197291252968
Measured from: 7.46800011396408
to: 22.1960000991821 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 24.6679999828339
to: 25.6679999828339 [s; relative to TRIGTIME]
Total Fluence
Measured from: -2.92799997329712
to: 26.6439999938011 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.235297 0.316046 0.129350 0.006507
0.034848 0.033905 0.028282 0.023494 [error]
Peak 0.017815 0.042274 0.014246 -0.003961
0.006540 0.006454 0.005226 0.004449 [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 7.16e-08 1.10e-07 1.26e-07 2.77e-07 3.89e-07 5.83e-07 erg/cm2
Error 1.38e-08 1.48e-08 2.61e-08 1.14e-07 6.21e-08 1.41e-07 erg/cm2
Peak flux Power-law 2.54e-01 2.11e-01 1.19e-01 9.86e-02 6.27e-01 6.82e-01 ph/cm2/s
Error 8.26e-02 4.90e-02 4.08e-02 6.41e-02 1.46e-01 1.61e-01 ph/cm2/s
Fluence Cutoff-PL 5.99e-08 1.38e-07 1.08e-07 1.84e-08 3.24e-07 0.00e+00 erg/cm2
Error 1.66e-08 2.34e-08 3.65e-08 4.48e-08 7.55e-08 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.88e-01 2.89e-01 9.57e-02 3.34e-03 5.76e-01 5.77e-01 ph/cm2/s
Error 1.47e-01 8.69e-02 7.96e-02 2.82e-02 1.53e-01 1.57e-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 1.801 0.231 - - 1.43e-03 2.23e-04 51.310 57
CPL -0.332 1.676 44.4 10.4 2.49e-02 1.69e-01 43.820 56
The chi2 of BB fit is 45.05 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 1.830 0.389 - - 4.50e-03 1.22e-03 59.930 57
CPL -1.014 4.957 42.4 16.5 2.10e-01 2.69e+03 55.380 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 29.572 -2.928 26.644
T90 27.216 -1.264 25.952
T50 14.728 7.468 22.196
Peak 1.000 24.668 25.668
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
303.7845 +6.2557 0.0170 17.0 64.3 0.7372 11.3 TRIG_00534402
------------------------------------------
Foreground time interval of the image:
-2.928 26.644 (delta_t = 29.572 [sec])
Background time interval of the image:
-239.936 -2.928 (delta_t = 237.008 [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 -2.928 sec. to 26.644 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.80089 ( -0.225856 0.2355 )
Norm@50keV : 1.42933E-03 ( -0.000224773 0.000220844 )
------------------------------------------------------------
# Chi-Squared = 51.31 using 59 PHA bins.
# Reduced chi-squared = 0.9001 for 57 degrees of freedom
# Null hypothesis probability = 6.875723e-01
Photon flux (15-150 keV) in 29.57 sec: 0.197025 ( -0.0267275 0.0267376 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.891e-07 ( -6.13873e-08 6.28818e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -2.928 sec. to 26.644 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.332284 ( -1.93072 1.42057 )
Epeak [keV] : 44.4006 ( -6.82684 13.9391 )
Norm@50keV : 2.48595E-02 ( -0.0253823 0.313004 )
------------------------------------------------------------
# Chi-Squared = 43.82 using 59 PHA bins.
# Reduced chi-squared = 0.7825 for 56 degrees of freedom
# Null hypothesis probability = 8.814586e-01
Photon flux (15-150 keV) in 29.57 sec: 0.183927 ( -0.027467 0.027728 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.23676e-07 ( -5.89241e-08 9.20869e-08 ) ergs/cm2
Band function
Time interval is from -2.928 sec. to 26.644 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.836046 ( -2.18133 -1.18762 )
beta : -2.93662 ( 2.8924 0.85208 )
Epeak [keV] : 41.4269 ( -10.1075 14.7006 )
Norm@50keV : 5.33529E-02 ( -0.0523129 22.086 )
------------------------------------------------------------
# Chi-Squared = 43.26 using 59 PHA bins.
# Reduced chi-squared = 0.7866 for 55 degrees of freedom
# Null hypothesis probability = 8.739848e-01
Photon flux (15-150 keV) in 29.57 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] : 10.9100 (-1.35758 1.58476)
R^2/D10^2 : 7.13271E-02 (-0.0288214 0.0464592)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 45.05 using 59 PHA bins.
# Reduced chi-squared = 0.7903 for 57 degrees of freedom
# Null hypothesis probability = 8.739668e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.237e-08 1.051e-08
25- 50 1.465e-07 2.688e-08
50-150 9.788e-08 3.272e-08
15-150 2.968e-07 5.240e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 85.5260 (-29.5045 64.5062)
Norm : 0.921301 (-0.164284 0.205586)
------------------------------------------------------------
# Chi-Squared = 47.55 using 59 PHA bins.
# Reduced chi-squared = 0.8342 for 57 degrees of freedom
# Null hypothesis probability = 8.095619e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.095e-08 1.307e-08
25- 50 1.186e-07 1.850e-08
50-150 1.750e-07 1.021e-07
15-150 3.646e-07 1.019e-07
Double BB
R1^2/D10^2 : 1.83793E-05 ( )
kT2 [keV] : 10.0544 (-4.07098 1.70314)
R2^2/D10^2 : 9.13280E-02 (-0.0373327 0.089837)
------------------------------------------------------------
# Chi-Squared = 43.90 using 59 PHA bins.
# Chi-Squared = 42.42 using 59 PHA bins.
# Chi-Squared = 42.35 using 59 PHA bins.
# Reduced chi-squared = 0.7982 for 55 degrees of freedom
# Reduced chi-squared = 0.7713 for 55 degrees of freedom
# Reduced chi-squared = 0.7700 for 55 degrees of freedom
# Null hypothesis probability = 8.587546e-01
# Null hypothesis probability = 8.925572e-01
# Null hypothesis probability = 8.940683e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.875e-08 4.501e-08
25- 50 1.390e-07 1.144e-07
50-150 1.232e-07 1.167e-07
15-150 3.210e-07 2.845e-07
Peak spectrum fit
Power-law model
Time interval is from 24.668 sec. to 25.668 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.82967 ( -0.372581 0.404617 )
Norm@50keV : 4.49941E-03 ( -0.00123377 0.00120095 )
------------------------------------------------------------
# Chi-Squared = 59.93 using 59 PHA bins.
# Reduced chi-squared = 1.051 for 57 degrees of freedom
# Null hypothesis probability = 3.700002e-01
Photon flux (15-150 keV) in 1 sec: 0.627288 ( -0.146003 0.146082 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.13843e-08 ( -1.10879e-08 1.15532e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 24.668 sec. to 25.668 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.01424 ( -7.50222 2.41167 )
Epeak [keV] : 42.3782 ( -8.6768 24.236 )
Norm@50keV : 0.209569 ( -0.279699 5375.27 )
------------------------------------------------------------
# Chi-Squared = 55.38 using 59 PHA bins.
# Reduced chi-squared = 0.9890 for 56 degrees of freedom
# Null hypothesis probability = 4.981749e-01
Photon flux (15-150 keV) in 1 sec: 0.576057 ( -0.15189 0.154181 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.2746e-08 ( -9.3331e-09 1.66452e-08 ) ergs/cm2
Band function
Time interval is from 24.668 sec. to 25.668 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.74617 ( -3.34479 -2.38731 )
beta : -3.58541 ( 3.5536 1.50018 )
Epeak [keV] : 39.4891 ( -9.90874 18.4505 )
Norm@50keV : 2.36009 ( -2.00899 29.3763 )
------------------------------------------------------------
# Chi-Squared = 54.60 using 59 PHA bins.
# Reduced chi-squared = 0.9926 for 55 degrees of freedom
# Null hypothesis probability = 4.900474e-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] : 10.6144 (-1.99159 2.63414)
R^2/D10^2 : 0.259424 (-0.149166 0.308606)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 55.35 using 59 PHA bins.
# Reduced chi-squared = 0.9711 for 57 degrees of freedom
# Null hypothesis probability = 5.371427e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.058e-09 2.961e-09
25- 50 1.635e-08 7.070e-09
50-150 1.011e-08 5.491e-09
15-150 3.252e-08 1.331e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 79.9018 (-37.7349 -79.9018)
Norm : 3.02162 (-0.825214 1.1882)
------------------------------------------------------------
# Chi-Squared = 57.93 using 59 PHA bins.
# Reduced chi-squared = 1.016 for 57 degrees of freedom
# Null hypothesis probability = 4.408150e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.840e-09 2.691e-09
25- 50 1.290e-08 7.180e-09
50-150 1.820e-08 1.458e-08
15-150 3.894e-08 2.140e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.63779E-02 (0.822496 -0.0763779)
R1^2/D10^2 : 1.38008E+13 (-1.38008e+13 -1.38008e+13)
kT2 [keV] : 10.6143 (-1.99155 2.63418)
R2^2/D10^2 : 0.259428 (-0.14917 0.308603)
------------------------------------------------------------
# Chi-Squared = 55.35 using 59 PHA bins.
# Reduced chi-squared = 1.006 for 55 degrees of freedom
# Null hypothesis probability = 4.613401e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Plot creation:
Sun Sep 23 15:31:59 EDT 2012