batgrbproduct Analysis for Trigger=547420
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 17:21:11 EST 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger547420/GCN5_download_cron
======================================================================
Trigger: 00547420 Segment: 000
BAT Trigger Time: 381352219.072 [s; MET]
Trigger Stop: 381352221.12 [s; MET]
UTC: 2013-01-31T19:10:08.907360 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 173.951574019347 Dec: 15.0356350571936 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.85
Image Trigger?: NO
Rate S/N Ratio: 16.7332005306815 [ if not an image trigger ]
Image S/N Ratio: 7.85
Flight Position: [ source = BAT ]
RA: 173.951574019347 Dec: 15.0356350571936 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 173.957549284148 Dec: 15.0317738355237 [deg; J2000]
{ 11h 35m 49.8s , +15d 01' 54.4" }
+/- 1.71518714110451 [arcmin] (estimated 90% radius based on SNR)
+/- 0.771640919170305 [arcmin] (formal 1-sigma fit error)
SNR: 14.07303113312
Angular difference between Flight and Ground position is 0.416603 arcmin
Partial Coding Fraction: 0.515625 [ including projection effects ]
Duration
T90: 4.29999995231628 +/- 0.257402418116644
Measured from: -0.0679998993873596
to: 4.23200005292892 [s; relative to TRIGTIME]
T50: 2.79999995231628 +/- 0.872715334057104
Measured from: 0.668000102043152
to: 3.46800005435944 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.280000030994415
to: 0.719999969005585 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.280000030994415
to: 4.36799997091293 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.106706 0.153680 0.152113 0.057105
0.016598 0.017615 0.016265 0.014758 [error]
Peak 0.036187 0.037704 0.037298 0.016281
0.007696 0.008148 0.007696 0.007098 [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 3.02e-08 6.89e-08 1.24e-07 5.31e-07 3.38e-07 7.55e-07 erg/cm2
Error 6.85e-09 9.10e-09 1.59e-08 1.61e-07 4.06e-08 1.68e-07 erg/cm2
Peak flux Power-law 2.91e-01 3.16e-01 2.44e-01 3.09e-01 9.68e-01 1.16e+00 ph/cm2/s
Error 1.10e-01 7.14e-02 6.57e-02 1.82e-01 2.01e-01 2.53e-01 ph/cm2/s
Fluence Cutoff-PL 3.04e-08 6.91e-08 1.24e-07 5.25e-07 7.48e-07 0.00e+00 erg/cm2
Error 6.97e-09 9.08e-09 1.61e-08 1.72e-07 1.77e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 2.96e-01 3.18e-01 2.43e-01 3.01e-01 9.69e-01 1.16e+00 ph/cm2/s
Error 1.10e-01 7.01e-02 6.56e-02 2.22e-01 2.01e-01 2.63e-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 1.15e+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 1.149 0.204 - - 7.07e-03 7.75e-04 0.000 57
CPL 1.144 0.393 10000.0 0.0 7.11e-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 1.372 0.396 - - 7.99e-03 1.68e-03 0.000 57
CPL 1.381 0.398 9999.4 0.0 7.98e-03 7.32e-03 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: 4.608000 sec.
T50 in the 50-300 keV band: 2.688000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 4.648 -0.280 4.368
T90 4.300 -0.068 4.232
T50 2.800 0.668 3.468
Peak 1.000 -0.280 0.720
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
173.9575 +15.0318 0.0136 33.1 28.1 0.4890 14.1 TRIG_00547420
------------------------------------------
Foreground time interval of the image:
-0.280 4.368 (delta_t = 4.648 [sec])
Background time interval of the image:
-239.072 -107.542 (delta_t = 131.530 [sec])
-106.072 -47.872 (delta_t = 58.200 [sec])
-47.072 -0.280 (delta_t = 46.792 [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 -0.280 sec. to 4.368 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.14874 ( -0.2066 0.201772 )
Norm@50keV : 7.07110E-03 ( -0.000776511 0.000774165 )
------------------------------------------------------------
#Test statistic : Chi-Squared = 54.06 using 59 PHA bins.
# Reduced chi-squared = 0.9485 for 57 degrees of freedom
# Null hypothesis probability = 5.859266e-01
Photon flux (15-150 keV) in 4.648 sec: 0.824522 ( -0.094191 0.0944554 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.38471e-07 ( -4.05067e-08 4.07579e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.280 sec. to 4.368 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.14403 ( -0.528085 0.25698 )
Epeak [keV] : 1.00000E+04 ( )
Norm@50keV : 7.10681E-03 ( )
------------------------------------------------------------
#Test statistic : Chi-Squared = 54.08 using 59 PHA bins.
# Reduced chi-squared = 0.9657 for 56 degrees of freedom
# Null hypothesis probability = 5.479522e-01
Photon flux (15-150 keV) in 4.648 sec: 0.824659 ( -0.094547 0.092407 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.48472e-07 ( -2.72126e-07 8.21488e-08 ) ergs/cm2
Band function
Time interval is from -0.280 sec. to 4.368 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.918369 ( 0.918369 0.918369 )
beta : -1.14873 ( 1.14873 0.206553 )
Epeak [keV] : 54.0391 ( -54.0391 -54.0391 )
Norm@50keV : 1.24878E-02 ( -0.00519267 1.05387 )
------------------------------------------------------------
#Test statistic : Chi-Squared = 54.06 using 59 PHA bins.
# Reduced chi-squared = 0.9830 for 55 degrees of freedom
# Null hypothesis probability = 5.103863e-01
Photon flux (15-150 keV) in 4.648 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] : 20.6897 (-3.11464 3.95506)
R^2/D10^2 : 3.36023E-02 (-0.014459 0.0237264)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Test statistic : Chi-Squared = 75.65 using 59 PHA bins.
# Reduced chi-squared = 1.327 for 57 degrees of freedom
# Null hypothesis probability = 4.975250e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.271e-08 2.773e-09
25- 50 6.473e-08 1.078e-08
50-150 2.062e-07 3.981e-08
15-150 2.837e-07 4.476e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 3.43222 (-0.384863 0.384826)
------------------------------------------------------------
#Test statistic : Chi-Squared = 66.41 using 59 PHA bins.
# Reduced chi-squared = 1.165 for 57 degrees of freedom
# Null hypothesis probability = 1.843045e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.974e-08 2.224e-08
25- 50 7.644e-08 4.174e-08
50-150 1.676e-07 9.152e-08
15-150 2.838e-07 1.556e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.45410 (-2.65269 6.02922)
R1^2/D10^2 : 0.945482 (-0.800675 6.9436)
kT2 [keV] : 32.2907 (-9.07059 135.15)
R2^2/D10^2 : 7.35251E-03 (-0.00678317 0.0136595)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.04 using 59 PHA bins.
#Test statistic : Chi-Squared = 56.04 using 59 PHA bins.
# Reduced chi-squared = 1.019 for 55 degrees of freedom
# Null hypothesis probability = 4.354965e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.214e-08 1.630e-08
25- 50 6.501e-08 2.447e-08
50-150 2.448e-07 1.180e-07
15-150 3.420e-07 1.403e-07
Peak spectrum fit
Power-law model
Time interval is from -0.280 sec. to 0.720 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.37214 ( -0.395212 0.395855 )
Norm@50keV : 7.99479E-03 ( -0.00169669 0.001673 )
------------------------------------------------------------
#Test statistic : Chi-Squared = 50.40 using 59 PHA bins.
# Reduced chi-squared = 0.8842 for 57 degrees of freedom
# Null hypothesis probability = 7.193276e-01
Photon flux (15-150 keV) in 1 sec: 0.967636 ( -0.201059 0.201592 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.77038e-08 ( -1.85891e-08 1.90333e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.280 sec. to 0.720 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.38097 ( -0.409308 0.387092 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 7.97549E-03 ( -0.00169593 0.0129497 )
------------------------------------------------------------
#Test statistic : Chi-Squared = 50.41 using 59 PHA bins.
# Reduced chi-squared = 0.9001 for 56 degrees of freedom
# Null hypothesis probability = 6.856228e-01
Photon flux (15-150 keV) in 1 sec: 0.969325 ( -0.202917 0.199725 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.45964e-07 ( -7.07012e-08 1.04936e-07 ) ergs/cm2
Band function
Time interval is from -0.280 sec. to 0.720 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.97253 ( -4.97253 -4.97253 )
beta : -1.48007 ( -0.540408 0.446586 )
Epeak [keV] : 25.2211 ( -25.2211 7.86552 )
Norm@50keV : 705.284 ( -143.985 4.49267e+06 )
------------------------------------------------------------
#Test statistic : Chi-Squared = 49.89 using 59 PHA bins.
# Reduced chi-squared = 0.9071 for 55 degrees of freedom
# Null hypothesis probability = 6.696926e-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] : 18.8323 (-6.34494 9.24588)
R^2/D10^2 : 4.95417E-02 (-0.0347592 0.14294)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Test statistic : Chi-Squared = 61.64 using 59 PHA bins.
# Reduced chi-squared = 1.081 for 57 degrees of freedom
# Null hypothesis probability = 3.137412e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.465e-09 1.622e-09
25- 50 1.656e-08 8.274e-09
50-150 4.308e-08 2.259e-08
15-150 6.311e-08 2.824e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-96.1936 -199.363)
Norm : 3.95151 (-0.818152 0.818173)
------------------------------------------------------------
#Test statistic : Chi-Squared = 51.67 using 59 PHA bins.
# Reduced chi-squared = 0.9064 for 57 degrees of freedom
# Null hypothesis probability = 6.747405e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.840e-09 5.810e-09
25- 50 1.893e-08 1.121e-08
50-150 4.151e-08 2.415e-08
15-150 7.028e-08 4.145e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.69645 (-1.66496 1.87296)
R1^2/D10^2 : 2.51196 (-1.87852 7.71737)
kT2 [keV] : 35.2212 (-13.0118 46.3923)
R2^2/D10^2 : 6.07616E-03 (-0.00521778 0.0180849)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.09 using 59 PHA bins.
#Test statistic : Chi-Squared = 47.09 using 59 PHA bins.
# Reduced chi-squared = 0.8562 for 55 degrees of freedom
# Null hypothesis probability = 7.670379e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.108e-08 6.520e-09
25- 50 1.586e-08 9.055e-09
50-150 5.698e-08 3.164e-08
15-150 8.392e-08 4.579e-08
Plot creation:
Fri Feb 1 17:42:40 EST 2013