batgrbproduct Analysis for Trigger=546731
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): Wed Jan 23 17:18:13 EST 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger546731/batgroup_hand_proc
======================================================================
Trigger: 00546731 Segment: 000
BAT Trigger Time: 380591059.584 [s; MET]
Trigger Stop: 380591071.744 [s; MET]
UTC: 2013-01-22T23:44:09.452440 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 194.218399686616 Dec: 59.0153258308736 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.76
Image Trigger?: NO
Rate S/N Ratio: 8.66025403784439 [ if not an image trigger ]
Image S/N Ratio: 7.76
Flight Position: [ source = BAT ]
RA: 194.218399686616 Dec: 59.0153258308736 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 194.307376650315 Dec: 59.0025452603605 [deg; J2000]
{ 12h 57m 13.8s , +59d 00' 09.2" }
+/- 2.95188380541384 [arcmin] (estimated 90% radius based on SNR)
+/- 1.51594551984708 [arcmin] (formal 1-sigma fit error)
SNR: 6.47959722611494
Angular difference between Flight and Ground position is 2.853833 arcmin
Partial Coding Fraction: 0.890625 [ including projection effects ]
Duration
T90: 64 +/- 35.7770876399966
Measured from: -12.5839998722076
to: 51.4160001277924 [s; relative to TRIGTIME]
T50: 32 +/- 16
Measured from: 3.41600012779236
to: 35.4160001277924 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 10.9160000085831
to: 11.9160000085831 [s; relative to TRIGTIME]
Total Fluence
Measured from: -12.5839999914169
to: 67.4160000085831 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.304341 0.364493 0.358743 0.142387
0.046760 0.048896 0.044639 0.043706 [error]
Peak 0.009844 0.025900 0.011650 0.003582
0.005280 0.005623 0.005013 0.004847 [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 8.28e-08 1.68e-07 2.66e-07 9.33e-07 7.39e-07 1.45e-06 erg/cm2
Error 1.97e-08 2.31e-08 4.55e-08 3.66e-07 1.11e-07 3.96e-07 erg/cm2
Peak flux Power-law 1.52e-01 1.40e-01 8.92e-02 8.74e-02 4.17e-01 4.68e-01 ph/cm2/s
Error 6.81e-02 4.36e-02 3.99e-02 7.68e-02 1.29e-01 1.52e-01 ph/cm2/s
Fluence Cutoff-PL 8.30e-08 1.68e-07 2.66e-07 9.21e-07 1.44e-06 0.00e+00 erg/cm2
Error 9.87e-09 2.22e-08 4.52e-08 4.67e-07 4.34e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.24e-01 1.72e-01 8.75e-02 1.22e-02 3.94e-01 3.95e-01 ph/cm2/s
Error 1.03e-01 6.75e-02 5.09e-02 7.45e-02 1.32e-01 1.15e-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 1.338 0.245 - - 9.43e-04 1.22e-04 79.240 57
CPL 3.449 0.304 372.0 0.0 8.13e-05 0.00e+00 78.620 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.649 0.538 - - 3.20e-03 1.13e-03 61.050 57
CPL -0.216 4.315 50.7 0.0 3.62e-02 0.00e+00 59.690 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: 93.632000 sec.
T50 in the 50-300 keV band: 47.488000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 80.000 -12.584 67.416
T90 64.000 -12.584 51.416
T50 32.000 3.416 35.416
Peak 1.000 10.916 11.916
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
194.3074 59.0025 0.0297 21.4874 -140.7110 0.8640642 6.480 TRIG_00546731
Foreground time interval of the image:
-12.584 55.217 (delta_t = 67.801 [sec])
Background time interval of the image:
-60.584 -12.584 (delta_t = 48.000 [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 -12.584 sec. to 67.416 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.33802 ( -0.244492 0.244946 )
Norm@50keV : 9.43441E-04 ( -0.000122472 0.000121738 )
------------------------------------------------------------
# Chi-Squared = 79.24 using 59 PHA bins.
# Reduced chi-squared = 1.390 for 57 degrees of freedom
# Null hypothesis probability = 2.732171e-02
Photon flux (15-150 keV) in 80 sec: 0.113381 ( -0.0146243 0.0146633 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.39154e-07 ( -1.09995e-07 1.11844e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -12.584 sec. to 67.416 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.44859 ( -0.3693 0.23928 )
Epeak [keV] : 371.951 ( -9961.87 -9961.87 )
Norm@50keV : 8.13262E-05 ( )
------------------------------------------------------------
# Chi-Squared = 78.62 using 59 PHA bins.
# Reduced chi-squared = 1.404 for 56 degrees of freedom
# Null hypothesis probability = 2.476072e-02
Photon flux (15-150 keV) in 80 sec: 0.113366 ( -0.0144033 0.014369 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.43788e-06 ( -4.2688e-07 4.40392e-07 ) ergs/cm2
Band function
Time interval is from -12.584 sec. to 67.416 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.08824 ( 1.08829 1.08829 )
beta : -1.33800 ( 1.338 0.24445 )
Epeak [keV] : 37.3849 ( -37.3604 -37.3604 )
Norm@50keV : 1.79959E-03 ( -0.00097557 0.142973 )
------------------------------------------------------------
# Chi-Squared = 79.24 using 59 PHA bins.
# Reduced chi-squared = 1.441 for 55 degrees of freedom
# Null hypothesis probability = 1.783621e-02
Photon flux (15-150 keV) in 80 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] : 16.9273 (-3.03875 4.03513)
R^2/D10^2 : 8.43812E-03 (-0.00838038 0.00800913)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 98.79 using 59 PHA bins.
# Reduced chi-squared = 1.733 for 57 degrees of freedom
# Null hypothesis probability = 4.991619e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.944e-08 1.028e-08
25- 50 1.739e-07 3.372e-08
50-150 3.553e-07 9.184e-08
15-150 5.686e-07 1.052e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.998 ( )
Norm : 0.463702 (-0.463702 -0.463702)
------------------------------------------------------------
# Chi-Squared = 82.47 using 59 PHA bins.
# Reduced chi-squared = 1.447 for 57 degrees of freedom
# Null hypothesis probability = 1.532143e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.238e-08 5.080e-08
25- 50 1.777e-07 9.680e-08
50-150 3.897e-07 2.141e-07
15-150 6.598e-07 3.580e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.74468 (-3.41363 4.89349)
R1^2/D10^2 : 0.225497 (-0.181493 0.65971)
kT2 [keV] : 28.7086 (-10.3152 62.0039)
R2^2/D10^2 : 1.32311E-03 (-0.00116901 0.0037691)
------------------------------------------------------------
# Chi-Squared = 81.08 using 59 PHA bins.
# Reduced chi-squared = 1.474 for 55 degrees of freedom
# Null hypothesis probability = 1.262627e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.813e-08 4.647e-08
25- 50 1.520e-07 6.568e-08
50-150 5.072e-07 2.843e-07
15-150 7.473e-07 3.189e-07
Peak spectrum fit
Power-law model
Time interval is from 10.916 sec. to 11.916 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.64859 ( -0.510654 0.565028 )
Norm@50keV : 3.19642E-03 ( -0.00115023 0.00110468 )
------------------------------------------------------------
# Chi-Squared = 61.05 using 59 PHA bins.
# Reduced chi-squared = 1.071 for 57 degrees of freedom
# Null hypothesis probability = 3.324929e-01
Photon flux (15-150 keV) in 1 sec: 0.417182 ( -0.129415 0.12942 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.97291e-08 ( -1.08498e-08 1.14865e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 10.916 sec. to 11.916 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.216325 ( -6.21089 2.41902 )
Epeak [keV] : 50.6780 ( )
Norm@50keV : 3.62236E-02 ( )
------------------------------------------------------------
# Chi-Squared = 59.69 using 59 PHA bins.
# Reduced chi-squared = 1.066 for 56 degrees of freedom
# Null hypothesis probability = 3.430346e-01
Photon flux (15-150 keV) in 1 sec: 0.394000 ( -0.130181 0.134119 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.55203e-08 ( -1.02444e-08 4.5289e-08 ) ergs/cm2
Band function
Time interval is from 10.916 sec. to 11.916 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.01635 ( -7.88394 3.76138 )
beta : -3.05096 ( 10 20 )
Epeak [keV] : 46.2278 ( -17.9262 171.551 )
Norm@50keV : 0.108680 ( -0.104709 51.8181 )
------------------------------------------------------------
# Chi-Squared = 59.56 using 59 PHA bins.
# Reduced chi-squared = 1.083 for 55 degrees of freedom
# Null hypothesis probability = 3.132618e-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] : 11.8925 (-3.1791 4.72699)
R^2/D10^2 : 0.113119 (-0.113119 0.232192)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 59.93 using 59 PHA bins.
# Reduced chi-squared = 1.051 for 57 degrees of freedom
# Null hypothesis probability = 3.698018e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.381e-09 2.090e-09
25- 50 1.053e-08 6.340e-09
50-150 8.899e-09 6.215e-09
15-150 2.281e-08 1.450e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 122.132 (-57.0624 -100.361)
Norm : 1.79962 (-0.592697 0.880584)
------------------------------------------------------------
# Chi-Squared = 60.45 using 59 PHA bins.
# Reduced chi-squared = 1.060 for 57 degrees of freedom
# Null hypothesis probability = 3.524091e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.684e-09 1.858e-09
25- 50 8.405e-09 2.931e-09
50-150 1.513e-08 5.405e-09
15-150 2.822e-08 9.275e-09
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.00003E-04 ( )
R1^2/D10^2 : 3.97109E+04 (-39710.9 -39710.9)
kT2 [keV] : 11.8930 (-3.17956 4.72653)
R2^2/D10^2 : 0.113104 (-0.113104 0.232209)
------------------------------------------------------------
# Chi-Squared = 59.95 using 59 PHA bins.
# Chi-Squared = 59.93 using 59 PHA bins.
# Reduced chi-squared = 1.090 for 55 degrees of freedom
# Reduced chi-squared = 1.090 for 55 degrees of freedom
# Null hypothesis probability = 3.010330e-01
# Null hypothesis probability = 3.014772e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.264e-09 2.113e-09
25- 50 1.046e-08 6.540e-09
50-150 9.436e-09 6.605e-09
15-150 2.316e-08 1.483e-08
Plot creation:
Wed Jan 23 19:41:45 EST 2013