batgrbproduct Analysis for Trigger=504307
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): Thu Sep 29 06:37:55 EDT 2011
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger504307/GCN5_download_cron
======================================================================
Trigger: 00504307 Segment: 000
BAT Trigger Time: 338930248 [s; MET]
Trigger Stop: 338931272 [s; MET]
UTC: 2011-09-28T19:17:20.587340 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 278.950506491583 Dec: -19.3281070513196 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 7.79
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.79
Flight Position: [ source = BAT ]
RA: 278.950506491583 Dec: -19.3281070513196 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 278.960626423509 Dec: -19.3308211576885 [deg; J2000]
{ 18h 35m 50.6s , -19d 19' 51.0" }
+/- 2.82044526478755 [arcmin] (estimated 90% radius based on SNR)
+/- 1.23620983468047 [arcmin] (formal 1-sigma fit error)
SNR: 6.91524249996217
Angular difference between Flight and Ground position is 0.595661 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 1024 +/-
Measured from: 0
to: 1024 [s; relative to TRIGTIME]
T50: 1024 +/-
Measured from: 0
to: 1024 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 1024 second)
Measured from: 0
to: 1024 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 1024 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.968754 0.922207 0.461388 -0.056246
0.144094 0.137844 0.118215 0.103109 [error]
Peak 0.968754 0.922207 0.461388 -0.056246
0.144094 0.137844 0.118215 0.103109 [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 2.64e-07 3.74e-07 3.93e-07 7.61e-07 1.27e-06 1.79e-06 erg/cm2
Error 6.07e-08 6.15e-08 1.11e-07 4.28e-07 2.56e-07 5.49e-07 erg/cm2
Peak flux Power-law 1.12e-02 8.73e-03 4.58e-03 3.49e-03 2.61e-02 2.80e-02 ph/cm2/s
Error 2.62e-03 1.43e-03 1.25e-03 1.82e-03 4.26e-03 4.65e-03 ph/cm2/s
Fluence Cutoff-PL 2.51e-07 4.08e-07 3.74e-07 2.21e-07 1.17e-06 1.25e-06 erg/cm2
Error 6.71e-08 8.77e-08 1.36e-07 5.79e-07 2.96e-07 6.89e-07 erg/cm2
Peak flux Cutoff-PL 1.05e-02 9.48e-03 4.45e-03 1.29e-03 2.54e-02 2.57e-02 ph/cm2/s
Error 2.94e-03 2.00e-03 1.49e-03 2.58e-03 4.43e-03 5.37e-03 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 1.929 0.308 - - 1.79e-04 3.69e-05 45.210 57
CPL 1.209 1.367 44.6 -1.5 4.76e-04 2.82e-03 44.360 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.929 0.308 - - 1.79e-04 3.69e-05 45.210 57
CPL 1.209 1.367 44.6 -0.9 4.76e-04 2.82e-03 44.360 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 1024.000 0.000 1024.000
T90 1024.000 0.000 1024.000
T50 1024.000 0.000 1024.000
Peak 1024.000 0.000 1024.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
278.9606 -19.3308 0.0278 16.6 -166.1 2.5471 6.9 TRIG_00504307
------------------------------------------
Foreground time interval of the image:
0.000 25.480 (delta_t = 25.480 [sec])
27.000 27.290 (delta_t = 0.290 [sec])
61.000 97.460 (delta_t = 36.460 [sec])
99.000 102.510 (delta_t = 3.510 [sec])
104.000 104.770 (delta_t = 0.770 [sec])
106.000 107.480 (delta_t = 1.480 [sec])
109.000 109.020 (delta_t = 0.020 [sec])
110.000 110.050 (delta_t = 0.050 [sec])
111.000 111.076 (delta_t = 0.076 [sec])
112.000 112.130 (delta_t = 0.130 [sec])
114.000 115.140 (delta_t = 1.140 [sec])
120.000 191.815 (delta_t = 71.815 [sec])
213.000 310.250 (delta_t = 97.250 [sec])
318.000 318.580 (delta_t = 0.580 [sec])
320.000 328.430 (delta_t = 8.430 [sec])
351.000 352.380 (delta_t = 1.380 [sec])
353.000 357.730 (delta_t = 4.730 [sec])
359.000 407.470 (delta_t = 48.470 [sec])
409.000 423.350 (delta_t = 14.350 [sec])
441.000 441.450 (delta_t = 0.450 [sec])
443.000 455.780 (delta_t = 12.780 [sec])
Background time interval of the image:
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
Multiple GTIs in the spectrum
tstart tstop
0.000000 25.480000
27.000000 27.290000
61.000000 97.460000
99.000000 102.510000
104.000000 104.770000
106.000000 107.480000
109.000000 109.020000
110.000000 110.050000
111.000000 111.076300
112.000000 112.130000
114.000000 115.140000
120.000000 191.815200
213.000000 310.250000
318.000000 318.580000
320.000000 328.430000
351.000000 352.380000
353.000000 357.730000
359.000000 407.470000
409.000000 423.350000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.92909 ( -0.296622 0.319852 )
Norm@50keV : 1.79399E-04 ( -3.75397e-05 3.6314e-05 )
------------------------------------------------------------
# Chi-Squared = 45.21 using 59 PHA bins.
# Reduced chi-squared = 0.7932 for 57 degrees of freedom
# Null hypothesis probability = 8.701179e-01
Photon flux (15-150 keV) in 769.6 sec: 2.60695E-02 ( -0.00425673 0.00425727 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.26989e-06 ( -2.50812e-07 2.60412e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 25.480000
27.000000 27.290000
61.000000 97.460000
99.000000 102.510000
104.000000 104.770000
106.000000 107.480000
109.000000 109.020000
110.000000 110.050000
111.000000 111.076300
112.000000 112.130000
114.000000 115.140000
120.000000 191.815200
213.000000 310.250000
318.000000 318.580000
320.000000 328.430000
351.000000 352.380000
353.000000 357.730000
359.000000 407.470000
409.000000 423.350000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.20912 ( -1.78545 0.948443 )
Epeak [keV] : 44.5621 ( -41.6166 -44.5617 )
Norm@50keV : 4.75959E-04 ( -0.000475994 0.00516929 )
------------------------------------------------------------
# Chi-Squared = 44.36 using 59 PHA bins.
# Reduced chi-squared = 0.7922 for 56 degrees of freedom
# Null hypothesis probability = 8.691870e-01
Photon flux (15-150 keV) in 769.6 sec: 2.53692E-02 ( -0.0044238 0.0044365 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.16951e-06 ( -2.76902e-07 3.15805e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 25.480000
27.000000 27.290000
61.000000 97.460000
99.000000 102.510000
104.000000 104.770000
106.000000 107.480000
109.000000 109.020000
110.000000 110.050000
111.000000 111.076300
112.000000 112.130000
114.000000 115.140000
120.000000 191.815200
213.000000 310.250000
318.000000 318.580000
320.000000 328.430000
351.000000 352.380000
353.000000 357.730000
359.000000 407.470000
409.000000 423.350000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.817223 ( 0.997576 2.8495 )
beta : -2.31069 ( 2.36473 0.672125 )
Epeak [keV] : 38.1554 ( -37.6521 30.5533 )
Norm@50keV : 8.88340E-04 ( -0.000638453 16.8159 )
------------------------------------------------------------
# Chi-Squared = 44.19 using 59 PHA bins.
# Reduced chi-squared = 0.8034 for 55 degrees of freedom
# Null hypothesis probability = 8.514461e-01
Photon flux (15-150 keV) in 769.6 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] : 9.93764 (-1.73894 2.1661)
R^2/D10^2 : 1.25750E-02 (-0.00666078 0.0136744)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 49.77 using 59 PHA bins.
# Reduced chi-squared = 0.8731 for 57 degrees of freedom
# Null hypothesis probability = 7.405849e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.942e-07 6.230e-08
25- 50 4.786e-07 1.100e-07
50-150 2.453e-07 1.129e-07
15-150 9.182e-07 2.425e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 71.0181 (-28.4465 70.2318)
Norm : 0.127928 (-0.0316428 0.0400061)
------------------------------------------------------------
# Chi-Squared = 44.36 using 59 PHA bins.
# Reduced chi-squared = 0.7783 for 57 degrees of freedom
# Null hypothesis probability = 8.888639e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.530e-07 5.695e-08
25- 50 4.040e-07 9.293e-08
50-150 5.245e-07 3.003e-07
15-150 1.182e-06 3.458e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.02810 (-4.10048 4.05206)
R1^2/D10^2 : 5.46790E-02 (-0.0430628 11.1309)
kT2 [keV] : 17.9545 (-16.054 -17.9908)
R2^2/D10^2 : 8.84048E-04 (-0.000874754 0.00963446)
------------------------------------------------------------
# Chi-Squared = 44.65 using 59 PHA bins.
# Reduced chi-squared = 0.8118 for 55 degrees of freedom
# Null hypothesis probability = 8.394395e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.485e-07 1.386e-07
25- 50 4.089e-07 2.195e-07
50-150 4.936e-07 2.861e-07
15-150 1.151e-06 5.834e-07
Peak spectrum fit
Power-law model
Time interval is from -338930248.000 sec. to -338930248.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.92909 ( -0.296622 0.319852 )
Norm@50keV : 1.79399E-04 ( -3.75397e-05 3.6314e-05 )
------------------------------------------------------------
# Chi-Squared = 45.21 using 59 PHA bins.
# Reduced chi-squared = 0.7932 for 57 degrees of freedom
# Null hypothesis probability = 8.701179e-01
Photon flux (15-150 keV) in 769.6 sec: 2.60695E-02 ( -0.00425673 0.00425727 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.26989e-06 ( -2.50812e-07 2.60412e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -338930248.000 sec. to -338930248.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.20912 ( -1.78545 0.948443 )
Epeak [keV] : 44.5621 ( -42.6818 -44.5617 )
Norm@50keV : 4.75959E-04 ( -0.000475994 0.00516929 )
------------------------------------------------------------
# Chi-Squared = 44.36 using 59 PHA bins.
# Reduced chi-squared = 0.7922 for 56 degrees of freedom
# Null hypothesis probability = 8.691870e-01
Photon flux (15-150 keV) in 769.6 sec: 2.53692E-02 ( -0.0044238 0.0044365 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.16951e-06 ( -2.76902e-07 3.15805e-07 ) ergs/cm2
Band function
Time interval is from -338930248.000 sec. to -338930248.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.817223 ( 0.997576 2.8495 )
beta : -2.31069 ( 2.36473 0.672125 )
Epeak [keV] : 38.1554 ( -37.6521 30.5533 )
Norm@50keV : 8.88340E-04 ( -0.000638453 16.8157 )
------------------------------------------------------------
# Chi-Squared = 44.19 using 59 PHA bins.
# Reduced chi-squared = 0.8034 for 55 degrees of freedom
# Null hypothesis probability = 8.514461e-01
Photon flux (15-150 keV) in 769.6 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] : 9.93764 (-1.73894 2.1661)
R^2/D10^2 : 1.25750E-02 (-0.00666078 0.0136744)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 49.77 using 59 PHA bins.
# Reduced chi-squared = 0.8731 for 57 degrees of freedom
# Null hypothesis probability = 7.405849e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.942e-07 6.188e-08
25- 50 4.786e-07 1.340e-07
50-150 2.453e-07 1.144e-07
15-150 9.182e-07 2.466e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 71.0181 (-28.4465 70.2318)
Norm : 0.127928 (-0.0316428 0.0400061)
------------------------------------------------------------
# Chi-Squared = 44.36 using 59 PHA bins.
# Reduced chi-squared = 0.7783 for 57 degrees of freedom
# Null hypothesis probability = 8.888639e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.530e-07 5.383e-08
25- 50 4.040e-07 9.181e-08
50-150 5.245e-07 3.014e-07
15-150 1.182e-06 3.902e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.02810 (-4.10048 4.05206)
R1^2/D10^2 : 5.46790E-02 (-0.0430628 11.1309)
kT2 [keV] : 17.9545 (-16.054 -17.9908)
R2^2/D10^2 : 8.84048E-04 (-0.000874754 0.00963446)
------------------------------------------------------------
# Chi-Squared = 44.65 using 59 PHA bins.
# Reduced chi-squared = 0.8118 for 55 degrees of freedom
# Null hypothesis probability = 8.394395e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.485e-07 1.465e-07
25- 50 4.089e-07 2.120e-07
50-150 4.936e-07 2.913e-07
15-150 1.151e-06 5.760e-07
Plot creation:
Thu Sep 29 06:55:12 EDT 2011