batgrbproduct Analysis for Trigger=509717
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 Dec 16 06:21:46 EST 2011
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger509717/GCN5_download_cron
======================================================================
Trigger: 00509717 Segment: 000
BAT Trigger Time: 345650656 [s; MET]
Trigger Stop: 345650976 [s; MET]
UTC: 2011-12-15T14:04:08.321280 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 349.548231274995 Dec: 32.475567914634 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 8.16
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.16
Flight Position: [ source = BAT ]
RA: 349.548231274995 Dec: 32.475567914634 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 349.5095164452 Dec: 32.4735631790366 [deg; J2000]
{ 23h 18m 02.3s , +32d 28' 24.8" }
+/- 3.93768932540414 [arcmin] (estimated 90% radius based on SNR)
+/- 2.96627805294966 [arcmin] (formal 1-sigma fit error)
SNR: 4.29312421008705
Angular difference between Flight and Ground position is 1.963347 arcmin
Partial Coding Fraction: 0.4648438 [ including projection effects ]
Duration
T90: 374.271999955177 +/- 93.6650802296451
Measured from: 7.60400009155273
to: 381.87600004673 [s; relative to TRIGTIME]
T50: 157.895999908447 +/- 112.475580799489
Measured from: 129.244000136852
to: 287.1400000453 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 216.347999989986
to: 217.347999989986 [s; relative to TRIGTIME]
Total Fluence
Measured from: 1.61599999666214
to: 411.019999980927 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.276686 1.430309 1.149848 0.251898
0.169246 0.175598 0.158893 0.146506 [error]
Peak 0.016839 0.016460 0.024981 0.014085
0.008638 0.008758 0.007774 0.007036 [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 4.15e-07 7.03e-07 9.08e-07 2.36e-06 2.68e-06 4.39e-06 erg/cm2
Error 8.11e-08 8.86e-08 1.55e-07 8.35e-07 3.74e-07 9.73e-07 erg/cm2
Peak flux Power-law 1.44e-01 1.59e-01 1.25e-01 1.62e-01 4.88e-01 5.89e-01 ph/cm2/s
Error 1.16e-01 1.19e-01 9.30e-02 1.99e-01 2.25e-01 2.59e-01 ph/cm2/s
Fluence Cutoff-PL 3.90e-07 7.50e-07 9.23e-07 1.06e-06 2.56e-06 3.13e-06 erg/cm2
Error 8.93e-08 1.13e-07 1.71e-07 1.49e-06 4.11e-07 1.40e-06 erg/cm2
Peak flux Cutoff-PL 1.24e-01 1.64e-01 1.34e-01 9.70e-02 4.74e-01 5.19e-01 ph/cm2/s
Error 9.91e-02 1.28e-01 7.79e-02 1.90e-01 2.93e-01 3.16e-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 3.40e-02 5.37e-01 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 1.632 0.210 - - 7.01e-04 9.18e-05 65.240 57
CPL 1.120 0.666 79.8 -25.7 1.33e-03 1.66e-03 63.830 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.345 0.814 - - 4.05e-03 1.77e-03 49.170 57
CPL 0.755 3.785 118.6 0.0 7.52e-03 4.02e+00 49.030 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 409.404 1.616 411.020
T90 374.272 7.604 381.876
T50 157.896 129.244 287.140
Peak 1.000 216.348 217.348
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
349.5095 +32.4736 0.0448 42.3 -26.5 2.5490 4.3 TRIG_00509717
------------------------------------------
Foreground time interval of the image:
1.616 343.401 (delta_t = 341.785 [sec])
Background time interval of the image:
-129.599 1.616 (delta_t = 131.215 [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 1.616 sec. to 411.020 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.63177 ( -0.20803 0.211904 )
Norm@50keV : 7.01263E-04 ( -9.22592e-05 9.12552e-05 )
------------------------------------------------------------
# Chi-Squared = 65.24 using 59 PHA bins.
# Reduced chi-squared = 1.145 for 57 degrees of freedom
# Null hypothesis probability = 2.121680e-01
Photon flux (15-150 keV) in 409.4 sec: 9.10247E-02 ( -0.0114139 0.01143 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.6752e-06 ( -3.71415e-07 3.76398e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.616 sec. to 411.020 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.11981 ( -0.885176 0.446712 )
Epeak [keV] : 79.7589 ( -28.4345 -79.7546 )
Norm@50keV : 1.32570E-03 ( -0.00068731 0.00263007 )
------------------------------------------------------------
# Chi-Squared = 63.83 using 59 PHA bins.
# Reduced chi-squared = 1.140 for 56 degrees of freedom
# Null hypothesis probability = 2.205160e-01
Photon flux (15-150 keV) in 409.4 sec: 8.94182E-02 ( -0.011629 0.0116458 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.56092e-06 ( -4.1001e-07 4.11873e-07 ) ergs/cm2
Band function
Time interval is from 1.616 sec. to 411.020 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.11958 ( 1.1129 0.885367 )
beta : -10.00000 ( 1.00255e+11 1.00255e+11 )
Epeak [keV] : 79.7355 ( -28.4314 -79.7389 )
Norm@50keV : 1.32590E-03 ( -0.000705825 0.00263174 )
------------------------------------------------------------
# Chi-Squared = 63.83 using 59 PHA bins.
# Reduced chi-squared = 1.161 for 55 degrees of freedom
# Null hypothesis probability = 1.939008e-01
Photon flux (15-150 keV) in 409.4 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] : 12.3826 (-2.03827 2.54656)
R^2/D10^2 : 1.98796E-02 (-0.00971046 0.0184765)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 79.81 using 59 PHA bins.
# Reduced chi-squared = 1.400 for 57 degrees of freedom
# Null hypothesis probability = 2.476749e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.645e-07 5.975e-08
25- 50 8.631e-07 1.539e-07
50-150 8.121e-07 2.104e-07
15-150 1.940e-06 3.265e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 147.211 (-13.7392 -100.916)
Norm : 0.379931 (-0.0524234 0.0645181)
------------------------------------------------------------
# Chi-Squared = 63.87 using 59 PHA bins.
# Reduced chi-squared = 1.121 for 57 degrees of freedom
# Null hypothesis probability = 2.477875e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.001e-07 7.328e-08
25- 50 7.396e-07 1.007e-07
50-150 1.449e-06 2.653e-07
15-150 2.588e-06 3.404e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.01797 (-1.50315 1.81954)
R1^2/D10^2 : 0.114260 (-0.063493 0.114933)
kT2 [keV] : 27.6714 (-8.06455 18.6684)
R2^2/D10^2 : 8.21794E-04 (-0.000650264 0.00199096)
------------------------------------------------------------
# Chi-Squared = 58.76 using 59 PHA bins.
# Reduced chi-squared = 1.068 for 55 degrees of freedom
# Null hypothesis probability = 3.395925e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.134e-07 2.148e-07
25- 50 7.627e-07 3.347e-07
50-150 1.486e-06 8.032e-07
15-150 2.662e-06 1.143e-06
Peak spectrum fit
Power-law model
Time interval is from 216.348 sec. to 217.348 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.34473 ( -0.834598 0.794196 )
Norm@50keV : 4.05149E-03 ( -0.00176773 0.0017673 )
------------------------------------------------------------
# Chi-Squared = 49.17 using 59 PHA bins.
# Reduced chi-squared = 0.8626 for 57 degrees of freedom
# Null hypothesis probability = 7.602425e-01
Photon flux (15-150 keV) in 1 sec: 0.487566 ( -0.222872 0.227192 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.96176e-08 ( -1.81738e-08 1.85441e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 216.348 sec. to 217.348 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.755114 ( -0.756339 6.81435 )
Epeak [keV] : 118.551 ( -118.706 -118.706 )
Norm@50keV : 7.52403E-03 ( -0.00751495 8.03122 )
------------------------------------------------------------
# Chi-Squared = 49.03 using 59 PHA bins.
# Reduced chi-squared = 0.8756 for 56 degrees of freedom
# Null hypothesis probability = 7.337486e-01
Photon flux (15-150 keV) in 1 sec: 0.474328 ( -0.351365 0.234096 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.8711e-08 ( -1.85e-08 1.90156e-08 ) ergs/cm2
Band function
Time interval is from 216.348 sec. to 217.348 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.764512 ( -1.35256 0.765921 )
beta : -9.36732 ( 9.99717 9.99717 )
Epeak [keV] : 126.606 ( -86.3458 -126.376 )
Norm@50keV : 7.20476E-03 ( -0.00719798 0.0264731 )
------------------------------------------------------------
# Chi-Squared = 49.04 using 59 PHA bins.
# Reduced chi-squared = 0.8916 for 55 degrees of freedom
# Null hypothesis probability = 7.006897e-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] : 19.5921 (-7.83025 16.9464)
R^2/D10^2 : 2.34759E-02 (-0.0234751 0.107591)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 49.73 using 59 PHA bins.
# Reduced chi-squared = 0.8724 for 57 degrees of freedom
# Null hypothesis probability = 7.418762e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.751e-09 1.231e-09
25- 50 8.603e-09 5.485e-09
50-150 2.440e-08 1.605e-08
15-150 3.476e-08 2.281e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-199.961 -199.961)
Norm : 2.05292 (-0.901173 1.04773)
------------------------------------------------------------
# Chi-Squared = 49.33 using 59 PHA bins.
# Reduced chi-squared = 0.8655 for 57 degrees of freedom
# Null hypothesis probability = 7.549102e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.112e-09 3.317e-09
25- 50 9.834e-09 6.130e-09
50-150 2.157e-08 1.356e-08
15-150 3.651e-08 2.386e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.95771 (-4.94546 38.4511)
R1^2/D10^2 : 1.78206 (-1.81676 -1.81676)
kT2 [keV] : 24.4364 (-24.4399 -24.4399)
R2^2/D10^2 : 9.89775E-03 (-0.0098949 0.0627709)
------------------------------------------------------------
# Chi-Squared = 48.12 using 59 PHA bins.
# Reduced chi-squared = 0.8749 for 55 degrees of freedom
# Null hypothesis probability = 7.328031e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.228e-09 3.478e-09
25- 50 8.505e-09 4.983e-09
50-150 2.598e-08 1.807e-08
15-150 3.971e-08 2.357e-08
Plot creation:
Fri Dec 16 06:44:59 EST 2011