batgrbproduct Analysis for Trigger=544027
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): Thu Dec 27 10:50:56 EST 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger544027/GCN5_download_cron
======================================================================
Trigger: 00544027 Segment: 000
BAT Trigger Time: 378241793.92 [s; MET]
Trigger Stop: 378241794.944 [s; MET]
UTC: 2012-12-26T19:09:43.890520 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 168.657836545913 Dec: -30.4144824746842 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.23
Image Trigger?: NO
Rate S/N Ratio: 15.6843871413581 [ if not an image trigger ]
Image S/N Ratio: 7.23
Flight Position: [ source = BAT ]
RA: 168.657836545913 Dec: -30.4144824746842 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 168.621883759535 Dec: -30.4098983088411 [deg; J2000]
{ 11h 14m 29.3s , -30d 24' 35.6" }
+/- 1.9542227178414 [arcmin] (estimated 90% radius based on SNR)
+/- 1.1514154431031 [arcmin] (formal 1-sigma fit error)
SNR: 11.6799546025148
Angular difference between Flight and Ground position is 1.880577 arcmin
Partial Coding Fraction: 0.359375 [ including projection effects ]
Duration
T90: 0.883999943733215 +/- 0.190588548648412
Measured from: -0.307999908924103
to: 0.576000034809113 [s; relative to TRIGTIME]
T50: 0.495999932289124 +/- 0.137753415489432
Measured from: 1.19209289550781e-07
to: 0.496000051498413 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.336000025272369
to: 0.663999974727631 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.364000022411346
to: 0.73199999332428 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.066933 0.064743 0.060894 0.039655
0.010097 0.011216 0.010044 0.008109 [error]
Peak 0.062903 0.058401 0.056256 0.036785
0.009661 0.010764 0.009641 0.007811 [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 1.76e-08 3.38e-08 5.04e-08 1.62e-07 1.42e-07 2.64e-07 erg/cm2
Error 5.22e-09 5.97e-09 9.63e-09 7.02e-08 2.37e-08 7.58e-08 erg/cm2
Peak flux Power-law 5.06e-01 5.44e-01 4.16e-01 5.20e-01 1.66e+00 1.99e+00 ph/cm2/s
Error 1.61e-01 1.05e-01 7.83e-02 2.12e-01 2.87e-01 3.22e-01 ph/cm2/s
Fluence Cutoff-PL 1.76e-08 3.39e-08 5.05e-08 1.61e-07 2.63e-07 0.00e+00 erg/cm2
Error 5.21e-09 5.96e-09 9.63e-09 7.31e-08 7.53e-08 0.00e+00 erg/cm2
Peak flux Cutoff-PL 5.05e-01 5.45e-01 4.17e-01 5.16e-01 1.66e+00 1.98e+00 ph/cm2/s
Error 1.39e-01 1.04e-01 5.91e-02 2.41e-01 2.86e-01 3.20e-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 1.425 0.284 - - 1.35e-02 2.10e-03 68.540 57
CPL 1.438 0.312 9999.4 0.0 1.34e-02 5.47e-03 68.560 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.387 0.295 - - 1.37e-02 2.20e-03 63.140 57
CPL 1.399 0.342 9999.4 0.0 1.37e-02 6.11e-03 63.160 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: 1.280000 sec.
T50 in the 50-300 keV band: 0.640000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 1.096 -0.364 0.732
T90 0.884 -0.308 0.576
T50 0.496 0.000 0.496
Peak 1.000 -0.336 0.664
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
168.6219 -30.4099 0.0163 47.5 -14.7 0.2481 11.7 TRIG_00544027
------------------------------------------
Foreground time interval of the image:
-0.364 0.732 (delta_t = 1.096 [sec])
Background time interval of the image:
-60.920 -0.364 (delta_t = 60.556 [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 -0.364 sec. to 0.732 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.42456 ( -0.286859 0.281759 )
Norm@50keV : 1.34904E-02 ( -0.00209866 0.00209507 )
------------------------------------------------------------
# Chi-Squared = 68.54 using 59 PHA bins.
# Reduced chi-squared = 1.202 for 57 degrees of freedom
# Null hypothesis probability = 1.408266e-01
Photon flux (15-150 keV) in 1.096 sec: 1.65226 ( -0.273803 0.274487 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.42169e-07 ( -2.36995e-08 2.37905e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.364 sec. to 0.732 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.43825 ( -0.354946 0.26921 )
Epeak [keV] : 9999.36 ( -9999.99 -9999.99 )
Norm@50keV : 1.34486E-02 ( -0.00209766 0.00884989 )
------------------------------------------------------------
# Chi-Squared = 68.56 using 59 PHA bins.
# Reduced chi-squared = 1.224 for 56 degrees of freedom
# Null hypothesis probability = 1.209148e-01
Photon flux (15-150 keV) in 1.096 sec: 1.65205 ( -0.27107 0.27363 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.62503e-07 ( -6.7256e-08 8.32544e-08 ) ergs/cm2
Band function
Time interval is from -0.364 sec. to 0.732 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99971 ( -6497.96 -6497.96 )
beta : -1.53117 ( -0.36803 0.330194 )
Epeak [keV] : 25.4952 ( -25.4555 6.99219 )
Norm@50keV : 1214.60 ( -1226.8 6.51729e+06 )
------------------------------------------------------------
# Chi-Squared = 67.15 using 59 PHA bins.
# Reduced chi-squared = 1.221 for 55 degrees of freedom
# Null hypothesis probability = 1.260815e-01
Photon flux (15-150 keV) in 1.096 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] : 17.8113 (-5.43952 7.77729)
R^2/D10^2 : 9.89611E-02 (-0.096658 0.250114)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 91.97 using 59 PHA bins.
# Reduced chi-squared = 1.614 for 57 degrees of freedom
# Null hypothesis probability = 2.291025e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.912e-09 2.733e-09
25- 50 3.171e-08 1.042e-08
50-150 7.283e-08 2.163e-08
15-150 1.115e-07 2.899e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.998 ( )
Norm : 6.84946 (-6.84946 -6.84946)
------------------------------------------------------------
# Chi-Squared = 70.86 using 59 PHA bins.
# Reduced chi-squared = 1.243 for 57 degrees of freedom
# Null hypothesis probability = 1.025197e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.870e-08 1.005e-08
25- 50 3.597e-08 1.964e-08
50-150 7.888e-08 4.295e-08
15-150 1.335e-07 7.338e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.97109 (-1.56155 2.05994)
R1^2/D10^2 : 2.28245 (-1.4275 3.89176)
kT2 [keV] : 49.8302 (-19.3305 137.069)
R2^2/D10^2 : 3.50913E-03 (-0.00321658 0.00681696)
------------------------------------------------------------
# Chi-Squared = 62.26 using 59 PHA bins.
# Reduced chi-squared = 1.132 for 55 degrees of freedom
# Null hypothesis probability = 2.335412e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.049e-08 1.156e-08
25- 50 3.397e-08 1.792e-08
50-150 9.626e-08 5.348e-08
15-150 1.507e-07 7.083e-08
Peak spectrum fit
Power-law model
Time interval is from -0.336 sec. to 0.664 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.38673 ( -0.298769 0.291382 )
Norm@50keV : 1.36964E-02 ( -0.0022016 0.00220157 )
------------------------------------------------------------
# Chi-Squared = 63.14 using 59 PHA bins.
# Reduced chi-squared = 1.108 for 57 degrees of freedom
# Null hypothesis probability = 2.684678e-01
Photon flux (15-150 keV) in 1 sec: 1.66301 ( -0.28675 0.287579 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.32707e-07 ( -2.28095e-08 2.28926e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.336 sec. to 0.664 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.39861 ( -0.4051 0.279885 )
Epeak [keV] : 9999.36 ( -9999.56 -9999.56 )
Norm@50keV : 1.36688E-02 ( -0.00220872 0.0100027 )
------------------------------------------------------------
# Chi-Squared = 63.16 using 59 PHA bins.
# Reduced chi-squared = 1.128 for 56 degrees of freedom
# Null hypothesis probability = 2.381173e-01
Photon flux (15-150 keV) in 1 sec: 1.66401 ( -0.28665 0.28441 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.50351e-07 ( -8.709e-08 8.3587e-08 ) ergs/cm2
Band function
Time interval is from -0.336 sec. to 0.664 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.88020 ( -17.9205 -17.9205 )
beta : -1.48441 ( -0.357914 0.335536 )
Epeak [keV] : 26.0820 ( -26.0448 7.41847 )
Norm@50keV : 843.630 ( -853.905 519.922 )
------------------------------------------------------------
# Chi-Squared = 62.16 using 59 PHA bins.
# Reduced chi-squared = 1.130 for 55 degrees of freedom
# Null hypothesis probability = 2.363255e-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] : 18.9746 (-5.43574 7.93191)
R^2/D10^2 : 8.15848E-02 (-0.0797135 0.176883)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 83.81 using 59 PHA bins.
# Reduced chi-squared = 1.470 for 57 degrees of freedom
# Null hypothesis probability = 1.193389e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.776e-09 2.128e-09
25- 50 2.776e-08 8.355e-09
50-150 7.342e-08 2.449e-08
15-150 1.070e-07 2.797e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.998 ( )
Norm : 6.93478 (-6.93478 -6.93478)
------------------------------------------------------------
# Chi-Squared = 65.64 using 59 PHA bins.
# Reduced chi-squared = 1.152 for 57 degrees of freedom
# Null hypothesis probability = 2.024157e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.726e-08 9.620e-09
25- 50 3.321e-08 1.836e-08
50-150 7.284e-08 3.930e-08
15-150 1.233e-07 6.770e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.03821 (-1.69478 2.28474)
R1^2/D10^2 : 2.15239 (-1.39582 4.13568)
kT2 [keV] : 48.7512 (-19.086 147.365)
R2^2/D10^2 : 3.83569E-03 (-0.00355094 0.0119254)
------------------------------------------------------------
# Chi-Squared = 57.99 using 59 PHA bins.
# Reduced chi-squared = 1.054 for 55 degrees of freedom
# Null hypothesis probability = 3.656936e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.824e-08 1.008e-08
25- 50 3.113e-08 1.662e-08
50-150 9.094e-08 5.081e-08
15-150 1.403e-07 7.292e-08
Plot creation:
Thu Dec 27 11:01:51 EST 2012