batgrbproduct Analysis for Trigger=507185
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): Mon Nov 7 14:56:29 EST 2011
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger507185/GCN5_download_cron
======================================================================
Trigger: 00507185 Segment: 000
BAT Trigger Time: 342319831.552 [s; MET]
Trigger Stop: 342319832.576 [s; MET]
UTC: 2011-11-07T00:50:24.005480 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 129.483957089502 Dec: -66.5062128673647 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.26
Image Trigger?: NO
Rate S/N Ratio: 13.856406460551 [ if not an image trigger ]
Image S/N Ratio: 8.26
Flight Position: [ source = BAT ]
RA: 129.483957089502 Dec: -66.5062128673647 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 129.486806011512 Dec: -66.5199578632255 [deg; J2000]
{ 08h 37m 56.8s , -66d 31' 11.8" }
+/- 1.18689592511221 [arcmin] (estimated 90% radius based on SNR)
+/- 0.387348447737847 [arcmin] (formal 1-sigma fit error)
SNR: 23.8130273219417
Angular difference between Flight and Ground position is 0.827509 arcmin
Partial Coding Fraction: 0.71875 [ including projection effects ]
Duration
T90: 26.6240000128746 +/- 6.6125505253912
Measured from: 0.76800012588501
to: 27.3920001387596 [s; relative to TRIGTIME]
T50: 9.72799998521805 +/- 2.18913679862536
Measured from: 3.07200014591217
to: 12.8000001311302 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 2.15600001811981
to: 3.15600001811981 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.0640000104904175
to: 32.8320000171661 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.412619 0.523345 0.395599 0.091906
0.035854 0.036616 0.031453 0.026966 [error]
Peak 0.036540 0.049213 0.055806 0.009865
0.006794 0.007261 0.006587 0.005247 [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 1.17e-07 2.17e-07 3.09e-07 9.32e-07 8.83e-07 1.58e-06 erg/cm2
Error 1.62e-08 1.75e-08 3.17e-08 2.13e-07 7.56e-08 2.35e-07 erg/cm2
Peak flux Power-law 2.95e-01 3.75e-01 3.49e-01 5.69e-01 1.21e+00 1.59e+00 ph/cm2/s
Error 8.06e-02 6.14e-02 5.24e-02 1.89e-01 1.66e-01 2.29e-01 ph/cm2/s
Fluence Cutoff-PL 1.17e-07 2.17e-07 3.10e-07 9.26e-07 8.83e-07 1.53e-06 erg/cm2
Error 1.23e-08 1.75e-08 3.17e-08 2.11e-07 7.55e-08 3.15e-07 erg/cm2
Peak flux Cutoff-PL 2.94e-01 3.76e-01 3.52e-01 5.28e-01 1.21e+00 1.57e+00 ph/cm2/s
Error 9.44e-02 6.37e-02 5.98e-02 1.93e-01 1.25e-01 2.29e-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 1.487 0.143 - - 2.82e-03 2.17e-04 62.440 57
CPL 2.285 0.198 102.1 0.0 1.10e-03 0.00e+00 60.660 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.106 0.243 - - 1.04e-02 1.39e-03 53.490 57
CPL 1.034 0.630 782.8 0.0 1.12e-02 1.39e-02 53.470 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: 234.944000 sec.
T50 in the 50-300 keV band: 146.880000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 32.896 -0.064 32.832
T90 26.624 0.768 27.392
T50 9.728 3.072 12.800
Peak 1.000 2.156 3.156
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
129.4868 -66.5200 0.0081 21.8 -108.4 0.9047 23.8 TRIG_00507185
------------------------------------------
Foreground time interval of the image:
-0.064 9.349 (delta_t = 9.413 [sec])
Background time interval of the image:
-239.552 -56.808 (delta_t = 182.744 [sec])
-55.552 -0.064 (delta_t = 55.488 [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 -0.064 sec. to 32.832 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.48737 ( -0.142568 0.14327 )
Norm@50keV : 2.82182E-03 ( -0.000217855 0.00021687 )
------------------------------------------------------------
# Chi-Squared = 62.44 using 59 PHA bins.
# Reduced chi-squared = 1.095 for 57 degrees of freedom
# Null hypothesis probability = 2.890890e-01
Photon flux (15-150 keV) in 32.9 sec: 0.351092 ( -0.0272186 0.0273134 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.82552e-07 ( -7.53097e-08 7.592e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.064 sec. to 32.832 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.28512 ( -0.251631 0.145055 )
Epeak [keV] : 102.062 ( -9999.64 -9999.64 )
Norm@50keV : 1.10258E-03 ( )
------------------------------------------------------------
# Chi-Squared = 60.66 using 59 PHA bins.
# Reduced chi-squared = 1.083 for 56 degrees of freedom
# Null hypothesis probability = 3.116233e-01
Photon flux (15-150 keV) in 32.9 sec: 0.350988 ( -0.027276 0.027095 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.83428e-07 ( -7.60549e-08 7.49988e-08 ) ergs/cm2
Band function
Time interval is from -0.064 sec. to 32.832 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.21554 ( 1.21555 1.21555 )
beta : -1.48733 ( 1.48736 0.142568 )
Epeak [keV] : 29.6532 ( -29.6567 -29.6567 )
Norm@50keV : 5.69315E-03 ( -0.00232536 0.407308 )
------------------------------------------------------------
# Chi-Squared = 62.44 using 59 PHA bins.
# Reduced chi-squared = 1.135 for 55 degrees of freedom
# Null hypothesis probability = 2.288832e-01
Photon flux (15-150 keV) in 32.9 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] : 15.4486 ( )
R^2/D10^2 : 3.43768E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 123.27 using 59 PHA bins.
# Reduced chi-squared = 2.1627 for 57 degrees of freedom
# Null hypothesis probability = 8.723118e-07
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.622e-08 8.784e-09
25- 50 2.294e-07 2.444e-08
50-150 3.774e-07 5.869e-08
15-150 6.630e-07 6.991e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.996 ( )
Norm : 1.43210 (-1.4321 -1.4321)
------------------------------------------------------------
# Chi-Squared = 65.98 using 59 PHA bins.
# Reduced chi-squared = 1.157 for 57 degrees of freedom
# Null hypothesis probability = 1.943677e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.173e-07 6.106e-08
25- 50 2.257e-07 1.183e-07
50-150 4.950e-07 2.596e-07
15-150 8.380e-07 4.400e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.90734 (-1.42915 1.57076)
R1^2/D10^2 : 0.416877 (-0.212609 0.565564)
kT2 [keV] : 32.4323 (-7.30774 14.1363)
R2^2/D10^2 : 2.36381E-03 (-0.00154902 0.00314944)
------------------------------------------------------------
# Chi-Squared = 62.69 using 59 PHA bins.
# Reduced chi-squared = 1.140 for 55 degrees of freedom
# Null hypothesis probability = 2.223483e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.158e-07 2.892e-08
25- 50 2.158e-07 5.384e-08
50-150 5.781e-07 2.374e-07
15-150 9.097e-07 2.940e-07
Peak spectrum fit
Power-law model
Time interval is from 2.156 sec. to 3.156 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.10557 ( -0.245343 0.240198 )
Norm@50keV : 1.04305E-02 ( -0.00139154 0.00138721 )
------------------------------------------------------------
# Chi-Squared = 53.49 using 59 PHA bins.
# Reduced chi-squared = 0.9384 for 57 degrees of freedom
# Null hypothesis probability = 6.075927e-01
Photon flux (15-150 keV) in 1 sec: 1.21052 ( -0.165845 0.166454 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.08862e-07 ( -1.59884e-08 1.61099e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.156 sec. to 3.156 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.03363 ( -0.953342 0.307214 )
Epeak [keV] : 782.840 ( -781.199 -781.199 )
Norm@50keV : 1.12210E-02 ( -0.0112229 0.0166186 )
------------------------------------------------------------
# Chi-Squared = 53.47 using 59 PHA bins.
# Reduced chi-squared = 0.9548 for 56 degrees of freedom
# Null hypothesis probability = 5.713475e-01
Photon flux (15-150 keV) in 1 sec: 1.20821 ( -0.08738 0.16294 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.08593e-07 ( -1.65073e-08 1.6247e-08 ) ergs/cm2
Band function
Time interval is from 2.156 sec. to 3.156 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.03242 ( 0.88846 0.88846 )
beta : -2.63184 ( 2.43484 12.4348 )
Epeak [keV] : 771.655 ( -771.655 -771.655 )
Norm@50keV : 1.12327E-02 ( -0.00150097 0.0136428 )
------------------------------------------------------------
# Chi-Squared = 53.47 using 59 PHA bins.
# Reduced chi-squared = 0.9721 for 55 degrees of freedom
# Null hypothesis probability = 5.333993e-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] : 22.6348 (-4.00366 5.16069)
R^2/D10^2 : 3.81794E-02 (-0.0179505 0.0325506)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 65.07 using 59 PHA bins.
# Reduced chi-squared = 1.142 for 57 degrees of freedom
# Null hypothesis probability = 2.162134e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.572e-09 1.070e-09
25- 50 1.920e-08 4.650e-09
50-150 7.353e-08 1.825e-08
15-150 9.630e-08 2.008e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.998 ( )
Norm : 4.97690 (-4.9769 -4.9769)
------------------------------------------------------------
# Chi-Squared = 63.39 using 59 PHA bins.
# Reduced chi-squared = 1.112 for 57 degrees of freedom
# Null hypothesis probability = 2.613224e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.239e-08 6.700e-09
25- 50 2.384e-08 1.315e-08
50-150 5.228e-08 2.854e-08
15-150 8.851e-08 4.817e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.38481 (-2.45053 3.66761)
R1^2/D10^2 : 2.48083 (-2.11209 16.2318)
kT2 [keV] : 29.6556 (-6.71499 13.1258)
R2^2/D10^2 : 1.51451E-02 (-0.0101949 0.0191197)
------------------------------------------------------------
# Chi-Squared = 51.57 using 59 PHA bins.
# Reduced chi-squared = 0.9376 for 55 degrees of freedom
# Null hypothesis probability = 6.066367e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.014e-08 5.362e-09
25- 50 1.916e-08 8.104e-09
50-150 8.075e-08 3.916e-08
15-150 1.101e-07 5.041e-08
Plot creation:
Mon Nov 7 15:14:37 EST 2011