batgrbproduct Analysis for Trigger=540178
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 2 08:32:01 EST 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger540178/GCN5_download_cron
======================================================================
Trigger: 00540178 Segment: 000
BAT Trigger Time: 376057552 [s; MET]
Trigger Stop: 376057616 [s; MET]
UTC: 2012-12-01T12:25:42.064740 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 13.4879874034949 Dec: -42.9520058447332 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.28
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 9.28
Flight Position: [ source = BAT ]
RA: 13.4879874034949 Dec: -42.9520058447332 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 13.4731776453209 Dec: -42.9294052635789 [deg; J2000]
{ 00h 53m 53.6s , -42d 55' 45.9" }
+/- 2.31798615102696 [arcmin] (estimated 90% radius based on SNR)
+/- 1.19669639185353 [arcmin] (formal 1-sigma fit error)
SNR: 9.15232577021022
Angular difference between Flight and Ground position is 1.503987 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 85 +/- 21.095023109729
Measured from: -22.9999998807907
to: 62.0000001192093 [s; relative to TRIGTIME]
T50: 24 +/- 10.295630140987
Measured from: -12.9999998807907
to: 11.0000001192093 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -9
to: -8 [s; relative to TRIGTIME]
Total Fluence
Measured from: -24
to: 71 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.551510 0.590055 0.316343 0.126599
0.052838 0.054263 0.047977 0.042940 [error]
Peak 0.030481 0.039906 0.024669 0.008785
0.005838 0.006236 0.005475 0.004638 [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 1.58e-07 2.28e-07 2.45e-07 4.88e-07 7.82e-07 1.12e-06 erg/cm2
Error 2.44e-08 2.40e-08 4.60e-08 1.86e-07 1.04e-07 2.33e-07 erg/cm2
Peak flux Power-law 2.68e-01 2.61e-01 1.77e-01 1.89e-01 7.82e-01 8.95e-01 ph/cm2/s
Error 7.47e-02 4.67e-02 4.39e-02 9.36e-02 1.37e-01 1.64e-01 ph/cm2/s
Fluence Cutoff-PL 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 Cutoff-PL 2.56e-01 2.70e-01 1.82e-01 1.28e-01 7.74e-01 8.35e-01 ph/cm2/s
Error 8.74e-02 5.80e-02 4.82e-02 1.45e-01 1.41e-01 2.02e-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 8.35e-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 1.898 0.210 - - 8.95e-04 1.20e-04 72.590 57
CPL 1.904 0.770 9990.8 0.0 8.87e-04 0.00e+00 72.590 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.557 0.312 - - 6.16e-03 1.18e-03 69.310 57
CPL 1.240 1.374 115.7 0.0 9.05e-03 0.00e+00 69.120 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: 22.784000 sec.
T50 in the 50-300 keV band: 13.824000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 95.000 -24.000 71.000
T90 85.000 -23.000 62.000
T50 24.000 -13.000 11.000
Peak 1.000 -9.000 -8.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
13.4732 -42.9294 0.0210 4.3 -8.2 1.1604 9.2 TRIG_00540178
------------------------------------------
Foreground time interval of the image:
-13.599 70.501 (delta_t = 84.100 [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 -24.000 sec. to 71.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.89797 ( -0.205187 0.215738 )
Norm@50keV : 8.94986E-04 ( -0.000121633 0.000118138 )
------------------------------------------------------------
# Chi-Squared = 72.59 using 59 PHA bins.
# Reduced chi-squared = 1.274 for 57 degrees of freedom
# Null hypothesis probability = 7.982865e-02
Photon flux (15-150 keV) in 95 sec: 0.128329 ( -0.0134193 0.0134207 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.81668e-07 ( -1.02387e-07 1.05081e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -24.000 sec. to 71.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.90354 ( -0.645679 0.893827 )
Epeak [keV] : 9990.75 ( )
Norm@50keV : 8.87244E-04 ( )
------------------------------------------------------------
# Chi-Squared = 72.59 using 59 PHA bins.
# Reduced chi-squared = 1.296 for 56 degrees of freedom
# Null hypothesis probability = 6.719375e-02
Photon flux (15-150 keV) in 95 sec: 0.128276 ( -0.013398 0.013399 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from -24.000 sec. to 71.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.51096 ( 1.51085 1.51085 )
beta : -1.89912 ( 1.89893 0.205983 )
Epeak [keV] : 21.4290 ( -21.4354 -21.4354 )
Norm@50keV : 2.00491E-03 ( -0.00112273 152044 )
------------------------------------------------------------
# Chi-Squared = 72.59 using 59 PHA bins.
# Reduced chi-squared = 1.320 for 55 degrees of freedom
# Null hypothesis probability = 5.619331e-02
Photon flux (15-150 keV) in 95 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] : 9.82739 (-1.34499 1.62448)
R^2/D10^2 : 6.16329E-02 (-0.0268947 0.0462975)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 100.29 using 59 PHA bins.
# Reduced chi-squared = 1.7595 for 57 degrees of freedom
# Null hypothesis probability = 3.512502e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.145e-07 2.105e-08
25- 50 2.776e-07 4.014e-08
50-150 1.377e-07 4.054e-08
15-150 5.298e-07 7.567e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 81.9760 (-26.785 52.9305)
Norm : 0.592429 (-0.0904198 0.11831)
------------------------------------------------------------
# Chi-Squared = 75.03 using 59 PHA bins.
# Reduced chi-squared = 1.316 for 57 degrees of freedom
# Null hypothesis probability = 5.495061e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.463e-07 2.242e-08
25- 50 2.422e-07 2.993e-08
50-150 3.475e-07 1.558e-07
15-150 7.359e-07 1.510e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.85232 ( )
R1^2/D10^2 : 0.337948 (-0.203878 0.949724)
kT2 [keV] : 24.1177 (-7.82837 22.4175)
R2^2/D10^2 : 1.66064E-03 (-0.00146914 0.00282354)
------------------------------------------------------------
# Chi-Squared = 76.91 using 59 PHA bins.
# Chi-Squared = 74.17 using 59 PHA bins.
# Reduced chi-squared = 1.398 for 55 degrees of freedom
# Reduced chi-squared = 1.349 for 55 degrees of freedom
# Null hypothesis probability = 2.719536e-02
# Null hypothesis probability = 4.339746e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.509e-07 8.787e-08
25- 50 2.043e-07 1.125e-07
50-150 3.216e-07 1.889e-07
15-150 6.768e-07 3.495e-07
Peak spectrum fit
Power-law model
Time interval is from -9.000 sec. to -8.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.55699 ( -0.303827 0.319965 )
Norm@50keV : 6.16377E-03 ( -0.00119642 0.00116547 )
------------------------------------------------------------
# Chi-Squared = 69.31 using 59 PHA bins.
# Reduced chi-squared = 1.216 for 57 degrees of freedom
# Null hypothesis probability = 1.270384e-01
Photon flux (15-150 keV) in 1 sec: 0.781884 ( -0.137352 0.137393 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.79693e-08 ( -1.21151e-08 1.2394e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -9.000 sec. to -8.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.23958 ( -1.55073 1.19808 )
Epeak [keV] : 115.749 ( -115.733 -115.733 )
Norm@50keV : 9.05265E-03 ( )
------------------------------------------------------------
# Chi-Squared = 69.12 using 59 PHA bins.
# Reduced chi-squared = 1.234 for 56 degrees of freedom
# Null hypothesis probability = 1.119694e-01
Photon flux (15-150 keV) in 1 sec: 0.773561 ( -0.141878 0.139596 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.77274e-08 ( -3.19323e-08 5.80906e-08 ) ergs/cm2
Band function
Time interval is from -9.000 sec. to -8.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.21927 ( 1.06227 1.06227 )
beta : -5.98638 ( 5.32019 15.3202 )
Epeak [keV] : 109.320 ( -56.3216 -109.32 )
Norm@50keV : 9.33865E-03 ( -0.00432181 0.00437002 )
------------------------------------------------------------
# Chi-Squared = 69.12 using 59 PHA bins.
# Reduced chi-squared = 1.257 for 55 degrees of freedom
# Null hypothesis probability = 9.539876e-02
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] : 14.0369 (-2.69812 3.4531)
R^2/D10^2 : 0.113232 (-0.0611363 0.125648)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 75.36 using 59 PHA bins.
# Reduced chi-squared = 1.322 for 57 degrees of freedom
# Null hypothesis probability = 5.213745e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.712e-09 1.625e-09
25- 50 1.757e-08 5.023e-09
50-150 2.283e-08 8.745e-09
15-150 4.511e-08 1.327e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 198.686 (-56.5504 -141.753)
Norm : 3.19294 (-0.559523 0.55902)
------------------------------------------------------------
# Chi-Squared = 69.14 using 59 PHA bins.
# Reduced chi-squared = 1.213 for 57 degrees of freedom
# Null hypothesis probability = 1.299670e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.954e-09 4.484e-09
25- 50 1.529e-08 8.500e-09
50-150 3.351e-08 1.853e-08
15-150 5.676e-08 3.183e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.50376 (-1.82205 4.36117)
R1^2/D10^2 : 77.9746 (-77.2772 1.93939e+08)
kT2 [keV] : 16.5384 (-3.666 6.98954)
R2^2/D10^2 : 5.92361E-02 (-0.0443365 0.0646201)
------------------------------------------------------------
# Chi-Squared = 68.05 using 59 PHA bins.
# Reduced chi-squared = 1.237 for 55 degrees of freedom
# Null hypothesis probability = 1.112698e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.648e-09 3.169e-09
25- 50 1.470e-08 7.364e-09
50-150 2.783e-08 1.287e-08
15-150 5.018e-08 2.109e-08
Plot creation:
Sun Dec 2 08:37:24 EST 2012