batgrbproduct Analysis for Trigger=524949
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 Jun 24 00:52:27 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger524949/GCN5_download_cron
======================================================================
Trigger: 00524949 Segment: 000
BAT Trigger Time: 362124512 [s; MET]
Trigger Stop: 362125216 [s; MET]
UTC: 2012-06-23T06:08:23.651820 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 186.423840675129 Dec: 16.302560639512 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 5.96
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 5.96
Flight Position: [ source = BAT ]
RA: 186.423840675129 Dec: 16.302560639512 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 186.303858179699 Dec: 16.4547428226165 [deg; J2000]
{ 12h 25m 12.9s , +16d 27' 17.1" }
+/- 4.84763090949809 [arcmin] (estimated 90% radius based on SNR)
+/- 3.22304780808147 [arcmin] (formal 1-sigma fit error)
SNR: 3.1899983409028
Angular difference between Flight and Ground position is 11.448925 arcmin
Partial Coding Fraction: 1.03125 [ including projection effects ]
Duration
T90: 704 +/-
Measured from: 0
to: 704 [s; relative to TRIGTIME]
T50: 704 +/-
Measured from: 0
to: 704 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 704 second)
Measured from: 0
to: 704 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 704 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.179587 0.218326 -0.039583 0.074496
0.068322 0.070187 0.061493 0.053443 [error]
Peak 0.179587 0.218326 -0.039583 0.074496
0.068322 0.070187 0.061493 0.053443 [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 5.76e-08 5.69e-08 3.94e-08 4.31e-08 1.71e-07 1.97e-07 erg/cm2
Error 2.76e-08 3.24e-08 4.44e-08 9.90e-08 1.05e-07 1.65e-07 erg/cm2
Peak flux Power-law 1.04e-02 5.72e-03 1.98e-03 8.95e-04 1.86e-02 1.90e-02 ph/cm2/s
Error 5.05e-03 3.14e-03 2.18e-03 1.87e-03 8.40e-03 8.81e-03 ph/cm2/s
Fluence Cutoff-PL 5.56e-08 7.69e-08 1.57e-08 1.63e-10 1.48e-07 0.00e+00 erg/cm2
Error 4.34e-08 4.71e-08 3.82e-08 2.21e-08 1.28e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 9.69e-03 7.83e-03 8.95e-04 5.09e-06 1.84e-02 1.84e-02 ph/cm2/s
Error 7.69e-03 4.63e-03 1.19e-03 9.33e-04 7.92e-03 7.91e-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 2.529 1.081 - - 9.28e-05 7.31e-05 49.290 57
CPL -0.371 0.000 26.5 0.0 8.18e-03 0.00e+00 48.050 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.529 1.081 - - 9.28e-05 7.31e-05 49.290 57
CPL -0.371 0.000 26.5 0.0 8.18e-03 0.00e+00 48.050 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 704.000 0.000 704.000
T90 704.000 0.000 704.000
T50 704.000 0.000 704.000
Peak 704.000 0.000 704.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
186.3039 +16.4547 0.0605 14.0 -160.2 0.4811 3.2 TRIG_00524949
------------------------------------------
Foreground time interval of the image:
0.000 183.046 (delta_t = 183.046 [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
Time interval is from 0.000 sec. to 183.046 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.52943 ( -0.829788 1.332 )
Norm@50keV : 9.27612E-05 ( -6.91278e-05 7.70266e-05 )
------------------------------------------------------------
# Chi-Squared = 49.29 using 59 PHA bins.
# Reduced chi-squared = 0.8648 for 57 degrees of freedom
# Null hypothesis probability = 7.561193e-01
Photon flux (15-150 keV) in 183 sec: 1.85547E-02 ( -0.00834219 0.00845483 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.7109e-07 ( -9.3924e-08 1.15316e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 183.046 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.371245 ( )
Epeak [keV] : 26.5247 ( )
Norm@50keV : 8.17564E-03 ( )
------------------------------------------------------------
# Chi-Squared = 48.05 using 59 PHA bins.
# Reduced chi-squared = 0.8580 for 56 degrees of freedom
# Null hypothesis probability = 7.661679e-01
Photon flux (15-150 keV) in 183 sec: 1.84259E-02 ( -0.0078604 0.0079803 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.48356e-07 ( -6.94335e-08 1.87381e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 183.046 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.54031 ( -0.27929 -0.27929 )
beta : -9.37167 ( 6.36883 16.3682 )
Epeak [keV] : 27.9102 ( -26.3654 65.4953 )
Norm@50keV : 4.99100E-02 ( -0.0421209 198209 )
------------------------------------------------------------
# Chi-Squared = 48.01 using 59 PHA bins.
# Reduced chi-squared = 0.8728 for 55 degrees of freedom
# Null hypothesis probability = 7.366730e-01
Photon flux (15-150 keV) in 183 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] : 7.13382 (-2.5675 3.5309)
R^2/D10^2 : 3.60243E-02 (-0.0360243 0.186005)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 47.99 using 59 PHA bins.
# Reduced chi-squared = 0.8420 for 57 degrees of freedom
# Null hypothesis probability = 7.964872e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.494e-08 3.448e-08
25- 50 7.804e-08 5.527e-08
50-150 1.384e-08 1.311e-08
15-150 1.468e-07 1.000e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 28.3766 (-17.2666 68.2258)
Norm : 0.162207 (-0.0943555 0.291264)
------------------------------------------------------------
# Chi-Squared = 48.50 using 59 PHA bins.
# Reduced chi-squared = 0.8509 for 57 degrees of freedom
# Null hypothesis probability = 7.810727e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.865e-08 3.804e-08
25- 50 6.494e-08 4.373e-08
50-150 3.302e-08 3.286e-08
15-150 1.566e-07 1.056e-07
Double BB
R1^2/D10^2 : 1719.67 ( )
kT2 [keV] : 7.69834 (-2.88156 -7.67739)
R2^2/D10^2 : 2.48328E-02 ( )
------------------------------------------------------------
# Chi-Squared = 47.96 using 59 PHA bins.
# Chi-Squared = 47.52 using 59 PHA bins.
# Chi-Squared = 47.49 using 59 PHA bins.
# Reduced chi-squared = 0.8721 for 55 degrees of freedom
# Reduced chi-squared = 0.8639 for 55 degrees of freedom
# Reduced chi-squared = 0.8634 for 55 degrees of freedom
# Null hypothesis probability = 7.380870e-01
# Null hypothesis probability = 7.531607e-01
# Null hypothesis probability = 7.541078e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.475e-08 4.744e-08
25- 50 7.733e-08 7.938e-08
50-150 1.601e-08 1.258e-08
15-150 1.481e-07 1.215e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 183.046 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.52943 ( -0.829788 1.332 )
Norm@50keV : 9.27612E-05 ( -6.91278e-05 7.70266e-05 )
------------------------------------------------------------
# Chi-Squared = 49.29 using 59 PHA bins.
# Reduced chi-squared = 0.8648 for 57 degrees of freedom
# Null hypothesis probability = 7.561193e-01
Photon flux (15-150 keV) in 183 sec: 1.85547E-02 ( -0.00834219 0.00845483 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.7109e-07 ( -9.3924e-08 1.15316e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 183.046 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.371245 ( )
Epeak [keV] : 26.5247 ( )
Norm@50keV : 8.17564E-03 ( )
------------------------------------------------------------
# Chi-Squared = 48.05 using 59 PHA bins.
# Reduced chi-squared = 0.8580 for 56 degrees of freedom
# Null hypothesis probability = 7.661679e-01
Photon flux (15-150 keV) in 183 sec: 1.84259E-02 ( -0.0078604 0.0079803 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.48356e-07 ( -6.94335e-08 1.87348e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 183.046 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.54031 ( -0.27929 -0.27929 )
beta : -9.37167 ( 6.36883 16.3682 )
Epeak [keV] : 27.9102 ( -26.3654 65.4953 )
Norm@50keV : 4.99100E-02 ( -0.0421209 198209 )
------------------------------------------------------------
# Chi-Squared = 48.01 using 59 PHA bins.
# Reduced chi-squared = 0.8728 for 55 degrees of freedom
# Null hypothesis probability = 7.366730e-01
Photon flux (15-150 keV) in 183 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] : 7.13382 (-2.5675 3.5309)
R^2/D10^2 : 3.60243E-02 (-0.0360243 0.186005)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 47.99 using 59 PHA bins.
# Reduced chi-squared = 0.8420 for 57 degrees of freedom
# Null hypothesis probability = 7.964872e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.494e-08 3.380e-08
25- 50 7.804e-08 5.159e-08
50-150 1.384e-08 1.205e-08
15-150 1.468e-07 9.278e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 28.3766 (-17.2666 68.2258)
Norm : 0.162207 (-0.0943555 0.291264)
------------------------------------------------------------
# Chi-Squared = 48.50 using 59 PHA bins.
# Reduced chi-squared = 0.8509 for 57 degrees of freedom
# Null hypothesis probability = 7.810727e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.865e-08 3.723e-08
25- 50 6.494e-08 4.335e-08
50-150 3.302e-08 2.994e-08
15-150 1.566e-07 1.060e-07
Double BB
R1^2/D10^2 : 1719.67 ( )
kT2 [keV] : 7.69834 (-2.88156 -7.67739)
R2^2/D10^2 : 2.48328E-02 ( )
------------------------------------------------------------
# Chi-Squared = 47.96 using 59 PHA bins.
# Chi-Squared = 47.52 using 59 PHA bins.
# Chi-Squared = 47.49 using 59 PHA bins.
# Reduced chi-squared = 0.8721 for 55 degrees of freedom
# Reduced chi-squared = 0.8639 for 55 degrees of freedom
# Reduced chi-squared = 0.8634 for 55 degrees of freedom
# Null hypothesis probability = 7.380870e-01
# Null hypothesis probability = 7.531607e-01
# Null hypothesis probability = 7.541078e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.475e-08 4.310e-08
25- 50 7.733e-08 7.244e-08
50-150 1.601e-08 2.117e-08
15-150 1.481e-07 1.126e-07
Plot creation:
Sun Jun 24 01:00:30 EDT 2012