batgrbproduct Analysis for Trigger=547407
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 Feb 1 17:45:50 EST 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger547407/GCN5_download_cron
======================================================================
Trigger: 00547407 Segment: 000
BAT Trigger Time: 381333392.192 [s; MET]
Trigger Stop: 381333393.216 [s; MET]
UTC: 2013-01-31T13:56:22.028180 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 171.108082478216 Dec: 48.0695104914022 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.89
Image Trigger?: NO
Rate S/N Ratio: 13.228756555323 [ if not an image trigger ]
Image S/N Ratio: 9.89
Flight Position: [ source = BAT ]
RA: 171.108082478216 Dec: 48.0695104914022 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 171.091830481257 Dec: 48.0639125254441 [deg; J2000]
{ 11h 24m 22.0s , +48d 03' 50.1" }
+/- 2.12143017173114 [arcmin] (estimated 90% radius based on SNR)
+/- 0.823221988594063 [arcmin] (formal 1-sigma fit error)
SNR: 10.3873769587188
Angular difference between Flight and Ground position is 0.733107 arcmin
Partial Coding Fraction: 0.9765625 [ including projection effects ]
Duration
T90: 51.5519999861717 +/- 2.44209745843414
Measured from: -0.291999876499176
to: 51.2600001096725 [s; relative to TRIGTIME]
T50: 45.41999989748 +/- 2.64991173400495
Measured from: 1.14400017261505
to: 46.5640000700951 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.0399999618530273
to: 0.960000038146973 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.951999962329865
to: 52.1520000100136 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.268185 0.238535 0.121209 0.014715
0.034933 0.035819 0.030976 0.026452 [error]
Peak 0.027967 0.046368 0.018982 0.004545
0.005168 0.005349 0.004660 0.003706 [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 7.63e-08 9.62e-08 8.84e-08 1.42e-07 3.09e-07 4.03e-07 erg/cm2
Error 1.54e-08 1.59e-08 2.76e-08 8.55e-08 6.29e-08 1.20e-07 erg/cm2
Peak flux Power-law 2.92e-01 2.48e-01 1.44e-01 1.25e-01 7.39e-01 8.10e-01 ph/cm2/s
Error 6.24e-02 3.97e-02 3.41e-02 5.40e-02 1.18e-01 1.34e-01 ph/cm2/s
Fluence Cutoff-PL 7.35e-08 1.04e-07 8.34e-08 4.58e-08 3.07e-07 0.00e+00 erg/cm2
Error 1.68e-08 2.19e-08 3.27e-08 1.15e-07 1.42e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 2.22e-01 3.43e-01 1.33e-01 7.00e-03 7.05e-01 7.05e-01 ph/cm2/s
Error 7.32e-02 6.03e-02 4.76e-02 1.39e-02 1.15e-01 1.16e-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 7.07e-01 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 2.122 0.317 - - 6.25e-04 1.42e-04 0.000 57
CPL 1.494 1.218 31.6 0.0 1.49e-03 0.00e+00 0.000 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.782 0.250 - - 5.40e-03 1.01e-03 0.000 57
CPL -1.227 1.797 43.8 7.5 3.00e-01 2.57e+00 0.000 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: 3.904000 sec.
T50 in the 50-300 keV band: 1.472000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 53.104 -0.952 52.152
T90 51.552 -0.292 51.260
T50 45.420 1.144 46.564
Peak 1.000 -0.040 0.960
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
171.0918 +48.0639 0.0186 9.7 -87.2 0.3869 10.4 TRIG_00547407
------------------------------------------
Foreground time interval of the image:
-0.952 16.409 (delta_t = 17.361 [sec])
Background time interval of the image:
-239.192 -167.002 (delta_t = 72.190 [sec])
-166.192 -0.952 (delta_t = 165.240 [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 -0.952 sec. to 52.152 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.12219 ( -0.298453 0.335436 )
Norm@50keV : 6.25134E-04 ( -0.000144412 0.000139546 )
------------------------------------------------------------
#Test statistic : Chi-Squared = 47.59 using 59 PHA bins.
# Reduced chi-squared = 0.8349 for 57 degrees of freedom
# Null hypothesis probability = 8.082930e-01
Photon flux (15-150 keV) in 53.1 sec: 9.94406E-02 ( -0.0154285 0.0154315 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.09113e-07 ( -6.1467e-08 6.44124e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.952 sec. to 52.152 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.49368 ( -1.61361 0.822514 )
Epeak [keV] : 31.6475 ( )
Norm@50keV : 1.49489E-03 ( )
------------------------------------------------------------
#Test statistic : Chi-Squared = 46.84 using 59 PHA bins.
# Reduced chi-squared = 0.8364 for 56 degrees of freedom
# Null hypothesis probability = 8.034641e-01
Photon flux (15-150 keV) in 53.1 sec: 9.75136E-02 ( -0.0157218 0.0158204 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.06633e-07 ( -8.10768e-08 2.03598e-07 ) ergs/cm2
Band function
Time interval is from -0.952 sec. to 52.152 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.49373 ( -6.20404 1.4974 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 31.6408 ( -12.7689 -31.6408 )
Norm@50keV : 1.49452E-03 ( -0.000904474 0.0133079 )
------------------------------------------------------------
#Test statistic : Chi-Squared = 46.84 using 59 PHA bins.
# Reduced chi-squared = 0.8516 for 55 degrees of freedom
# Null hypothesis probability = 7.751668e-01
Photon flux (15-150 keV) in 53.1 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] : 8.87502 (-1.55352 1.86645)
R^2/D10^2 : 7.31054E-02 (-0.0380819 0.0807391)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Test statistic : Chi-Squared = 54.12 using 59 PHA bins.
# Reduced chi-squared = 0.9495 for 57 degrees of freedom
# Null hypothesis probability = 5.837201e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.909e-08 1.723e-08
25- 50 1.229e-07 3.128e-08
50-150 4.490e-08 2.127e-08
15-150 2.269e-07 5.615e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 52.4430 (-18.8691 37.6594)
Norm : 0.551986 (-0.129496 0.187906)
------------------------------------------------------------
#Test statistic : Chi-Squared = 46.90 using 59 PHA bins.
# Reduced chi-squared = 0.8228 for 57 degrees of freedom
# Null hypothesis probability = 8.277304e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.242e-08 1.399e-08
25- 50 1.058e-07 2.344e-08
50-150 1.073e-07 5.119e-08
15-150 2.855e-07 7.386e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.47385 (-4.06602 3.21922)
R1^2/D10^2 : 0.665250 (-0.554765 -0.658663)
kT2 [keV] : 14.1712 (-5.67265 18.2753)
R2^2/D10^2 : 8.88691E-03 (-0.00845895 0.0727934)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.24 using 59 PHA bins.
#Test statistic : Chi-Squared = 47.24 using 59 PHA bins.
# Reduced chi-squared = 0.8590 for 55 degrees of freedom
# Null hypothesis probability = 7.621075e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.387e-08 3.975e-08
25- 50 1.017e-07 5.244e-08
50-150 1.007e-07 6.146e-08
15-150 2.763e-07 1.436e-07
Peak spectrum fit
Power-law model
Time interval is from -0.040 sec. to 0.960 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.78176 ( -0.242834 0.257282 )
Norm@50keV : 5.40078E-03 ( -0.00101626 0.00100086 )
------------------------------------------------------------
#Test statistic : Chi-Squared = 72.91 using 59 PHA bins.
# Reduced chi-squared = 1.279 for 57 degrees of freedom
# Null hypothesis probability = 7.617089e-02
Photon flux (15-150 keV) in 1 sec: 0.739013 ( -0.118227 0.118229 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.97335e-08 ( -9.39933e-09 9.70511e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.040 sec. to 0.960 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.22671 ( -2.07903 1.51461 )
Epeak [keV] : 43.8311 ( -6.17082 8.80221 )
Norm@50keV : 0.299756 ( -0.31512 4.81595 )
------------------------------------------------------------
#Test statistic : Chi-Squared = 57.89 using 59 PHA bins.
# Reduced chi-squared = 1.034 for 56 degrees of freedom
# Null hypothesis probability = 4.055130e-01
Photon flux (15-150 keV) in 1 sec: 0.705209 ( -0.114906 0.115972 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.16692e-08 ( -7.8373e-09 9.2611e-09 ) ergs/cm2
Band function
Time interval is from -0.040 sec. to 0.960 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.15208 ( -1.40928 2.17799 )
beta : -9.37167 ( 9.37167 19.3701 )
Epeak [keV] : 44.3192 ( -6.6854 8.30833 )
Norm@50keV : 0.269309 ( -0.268865 60.5082 )
------------------------------------------------------------
#Test statistic : Chi-Squared = 57.89 using 59 PHA bins.
# Reduced chi-squared = 1.053 for 55 degrees of freedom
# Null hypothesis probability = 3.691435e-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] : 11.1886 (-1.51819 1.74769)
R^2/D10^2 : 0.261119 (-0.109518 0.184618)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Test statistic : Chi-Squared = 57.97 using 59 PHA bins.
# Reduced chi-squared = 1.017 for 57 degrees of freedom
# Null hypothesis probability = 4.391796e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.852e-09 2.107e-09
25- 50 1.980e-08 4.265e-09
50-150 1.418e-08 5.422e-09
15-150 4.083e-08 8.935e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 83.2634 (-30.196 66.3376)
Norm : 3.54167 (-0.67376 0.839062)
------------------------------------------------------------
#Test statistic : Chi-Squared = 67.10 using 59 PHA bins.
# Reduced chi-squared = 1.177 for 57 degrees of freedom
# Null hypothesis probability = 1.693534e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.211e-09 1.997e-09
25- 50 1.531e-08 2.900e-09
50-150 2.219e-08 1.414e-08
15-150 4.671e-08 1.567e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.54528 (-6.56807 -6.56807)
R1^2/D10^2 : 0.249574 (-0.251609 -0.251609)
kT2 [keV] : 11.9091 (-11.9403 -11.9403)
R2^2/D10^2 : 0.186846 (-0.183715 0.255746)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.83 using 59 PHA bins.
#Test statistic : Chi-Squared = 57.83 using 59 PHA bins.
# Reduced chi-squared = 1.052 for 55 degrees of freedom
# Null hypothesis probability = 3.710564e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.194e-09 8.715e-09
25- 50 1.938e-08 5.385e-08
50-150 1.507e-08 1.373e-07
15-150 4.164e-08 1.422e-07
Plot creation:
Fri Feb 1 17:59:22 EST 2013