batgrbproduct Analysis for Trigger=581129
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 Dec 15 15:17:29 EST 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger581129/GCN5_download_cron
======================================================================
Trigger: 00581129 Segment: 000
BAT Trigger Time: 408770814.452 [s; MET]
Trigger Stop: 408770814.516 [s; MET]
UTC: 2013-12-15T03:26:43.056740 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 178.341830838294 Dec: 47.9423038496901 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 5.95
Image Trigger?: NO
Rate S/N Ratio: 8 [ if not an image trigger ]
Image S/N Ratio: 5.95
Flight Position: [ source = BAT ]
RA: 178.341830838294 Dec: 47.9423038496901 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 178.376472005539 Dec: 47.9193728138365 [deg; J2000]
{ 11h 53m 30.4s , +47d 55' 09.7" }
+/- 3.55171098128217 [arcmin] (estimated 90% radius based on SNR)
+/- 2.34339544460239 [arcmin] (formal 1-sigma fit error)
SNR: 4.97483780106625
Angular difference between Flight and Ground position is 1.957656 arcmin
Partial Coding Fraction: 0.7734375 [ including projection effects ]
Duration
T90: 0.0639999508857727 +/-
Measured from: 0
to: 0.0639999508857727 [s; relative to TRIGTIME]
T50: 0.0639999508857727 +/-
Measured from: 0
to: 0.0639999508857727 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.0639999508857727 second)
Measured from: -2.98023223876953e-08
to: 0.0639999210834503 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.0639999508857727 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.001433 0.001514 0.004391 0.005677
0.001584 0.001647 0.001657 0.001739 [error]
Peak 0.001433 0.001514 0.004391 0.005677
0.001584 0.001647 0.001657 0.001739 [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 5.46e-10 4.88e-10 2.96e-10 2.70e-10 1.45e-09 1.65e-09 erg/cm2
Error 6.14e-10 5.25e-10 4.17e-10 1.88e-09 1.59e-09 1.92e-09 erg/cm2
Peak flux Power-law 2.82e-01 1.41e-01 4.29e-02 1.64e-02 4.77e-01 4.85e-01 ph/cm2/s
Error 3.20e-01 1.50e-01 5.91e-02 6.88e-02 5.04e-01 5.12e-01 ph/cm2/s
Fluence Cutoff-PL 1.68e-11 8.53e-10 2.08e-09 3.72e-10 3.02e-09 3.44e-09 erg/cm2
Error 8.96e-11 7.81e-10 1.30e-09 4.63e-10 1.84e-09 1.85e-09 erg/cm2
Peak flux Cutoff-PL 7.28e-03 2.03e-01 3.09e-01 3.22e-02 5.27e-01 5.28e-01 ph/cm2/s
Error 4.25e-02 1.92e-01 1.90e-01 3.31e-02 3.26e-01 3.26e-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 2.677 0.000 - - 2.17e-03 2.55e-03 56.290 57
CPL -10.000 0.000 61.9 9.0 2.06e+02 3.78e+02 50.920 56
The chi2 of BB fit is which shows a significant improvement in the fit over a PL.
Check the BB fit.
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.677 0.000 - - 2.17e-03 2.55e-03 56.290 57
CPL -10.000 0.000 61.9 9.0 2.06e+02 3.78e+02 50.920 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 0.064 0.000 0.064
T90 0.064 0.000 0.064
T50 0.064 0.000 0.064
Peak 0.064 -0.000 0.064
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
178.3765 +47.9194 0.0387 30.6 -177.2 0.0159 5.0 TRIG_00581129
------------------------------------------
Foreground time interval of the image:
0.000 0.064 (delta_t = 0.064 [sec])
Background time interval of the image:
-239.452 -47.142 (delta_t = 192.310 [sec])
-46.452 -6.452 (delta_t = 40.000 [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 0.000 sec. to 0.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.67743 ( -2.7557 -2.7557 )
Norm@50keV : 2.16729E-03 ( -0.00214664 0.00295702 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.29 using 59 PHA bins.
# Reduced chi-squared = 0.9876 for 57 degrees of freedom
# Null hypothesis probability = 5.016058e-01
Photon flux (15-150 keV) in 0.064 sec: 0.477201 ( -0.477201 0.531092 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.44605e-09 ( -1.44605e-09 1.73437e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.99996 ( )
Epeak [keV] : 61.9128 ( -9.56592 8.49554 )
Norm@50keV : 206.267 ( -206.278 549.644 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.92 using 59 PHA bins.
# Reduced chi-squared = 0.9093 for 56 degrees of freedom
# Null hypothesis probability = 6.669382e-01
Photon flux (15-150 keV) in 0.064 sec: 0.527324 ( -0.324074 0.3274 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.02132e-09 ( -1.84086e-09 1.84588e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -4.03567 -5 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 56.3915 ( -16.456 14.3245 )
Norm@50keV : 5.02673 ( -4.98873 31.6571 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.33 using 59 PHA bins.
# Reduced chi-squared = 0.9695 for 55 degrees of freedom
# Null hypothesis probability = 5.388556e-01
Photon flux (15-150 keV) in 0.064 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] : 12.4509 (-12.393 6.22579)
R^2/D10^2 : 0.151172 (-0.151369 14.3648)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.38 using 59 PHA bins.
# Reduced chi-squared = 0.9540 for 57 degrees of freedom
# Null hypothesis probability = 5.741260e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.179e-10 2.472e-10
25- 50 1.044e-09 7.536e-10
50-150 9.968e-10 9.210e-10
15-150 2.359e-09 1.967e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 37.4317 (-36.7483 -36.7483)
Norm : 3.97307 (-3.99825 1672.22)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.54 using 59 PHA bins.
# Reduced chi-squared = 0.9743 for 57 degrees of freedom
# Null hypothesis probability = 5.301828e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.703e-10 4.470e-10
25- 50 7.285e-10 5.962e-10
50-150 5.233e-10 6.227e-10
15-150 1.822e-09 1.647e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.19768 (-3.19266 15.1846)
R1^2/D10^2 : 9.50609 (-9.65033 -9.65033)
kT2 [keV] : 12.6811 (-12.6815 -12.6815)
R2^2/D10^2 : 0.130786 (-0.130776 9.74741)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.27 using 59 PHA bins.
# Reduced chi-squared = 0.9867 for 55 degrees of freedom
# Null hypothesis probability = 5.025667e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.527e-10 2.933e-10
25- 50 9.871e-10 8.109e-10
50-150 9.585e-10 1.005e-09
15-150 2.398e-09 2.000e-09
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.67743 ( -2.7557 -2.7557 )
Norm@50keV : 2.16729E-03 ( -0.00214664 0.00295702 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.29 using 59 PHA bins.
# Reduced chi-squared = 0.9876 for 57 degrees of freedom
# Null hypothesis probability = 5.016058e-01
Photon flux (15-150 keV) in 0.064 sec: 0.477201 ( -0.477201 0.531092 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.44605e-09 ( -1.44605e-09 1.73437e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.99996 ( )
Epeak [keV] : 61.9128 ( -9.56592 8.49554 )
Norm@50keV : 206.267 ( -206.278 549.644 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.92 using 59 PHA bins.
# Reduced chi-squared = 0.9093 for 56 degrees of freedom
# Null hypothesis probability = 6.669382e-01
Photon flux (15-150 keV) in 0.064 sec: 0.527324 ( -0.324074 0.3274 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.02132e-09 ( -1.84086e-09 1.84588e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -4.03567 -5 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 56.3915 ( -16.456 14.3245 )
Norm@50keV : 5.02673 ( -4.98873 31.6571 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.33 using 59 PHA bins.
# Reduced chi-squared = 0.9695 for 55 degrees of freedom
# Null hypothesis probability = 5.388556e-01
Photon flux (15-150 keV) in 0.064 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] : 12.4509 (-12.393 6.22579)
R^2/D10^2 : 0.151172 (-0.151369 14.3648)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.38 using 59 PHA bins.
# Reduced chi-squared = 0.9540 for 57 degrees of freedom
# Null hypothesis probability = 5.741260e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.179e-10 2.447e-10
25- 50 1.044e-09 8.442e-10
50-150 9.968e-10 9.370e-10
15-150 2.359e-09 2.132e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 37.4317 (-36.7483 -36.7483)
Norm : 3.97307 (-3.99825 1672.22)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.54 using 59 PHA bins.
# Reduced chi-squared = 0.9743 for 57 degrees of freedom
# Null hypothesis probability = 5.301828e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.703e-10 4.579e-10
25- 50 7.285e-10 6.390e-10
50-150 5.233e-10 6.717e-10
15-150 1.822e-09 1.664e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.19768 (-3.19266 15.1846)
R1^2/D10^2 : 9.50609 (-9.65033 -9.65033)
kT2 [keV] : 12.6811 (-12.6815 -12.6815)
R2^2/D10^2 : 0.130786 (-0.130776 9.74741)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.27 using 59 PHA bins.
# Reduced chi-squared = 0.9867 for 55 degrees of freedom
# Null hypothesis probability = 5.025667e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.527e-10 2.932e-10
25- 50 9.871e-10 8.442e-10
50-150 9.585e-10 8.317e-10
15-150 2.398e-09 2.117e-09
Plot creation:
Sun Dec 15 15:39:10 EST 2013