batgrbproduct Analysis for Trigger=340603
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 Jun 3 15:45:51 EDT 2011
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger340603/SDC
======================================================================
Trigger: 00340603 Segment: 000
BAT Trigger Time: 254285645.44 [s; MET]
Trigger Stop: 254285645.568 [s; MET]
UTC: 2009-01-22T02:54:01.004260 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 237.708534810372 Dec: -54.3021512307477 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 26.81
Image Trigger?: NO
Rate S/N Ratio: 255.998046867549 [ if not an image trigger ]
Image S/N Ratio: 26.81
Flight Position: [ source = BAT ]
RA: 237.708534810372 Dec: -54.3021512307477 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 237.770984121363 Dec: -54.3045505157284 [deg; J2000]
{ 15h 51m 05.0s , -54d 18' 16.4" }
+/- 1.55032483091769 [arcmin] (estimated 90% radius based on SNR)
+/- 0.835333541539008 [arcmin] (formal 1-sigma fit error)
SNR: 16.258704845939
Angular difference between Flight and Ground position is 2.191061 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 509.700000017881 +/- 0.0960832834786804
Measured from: -0.0160000026226044
to: 509.684000015259 [s; relative to TRIGTIME]
T50: 509.579999983311 +/- 0.00565686571343518
Measured from: 0.0520000159740448
to: 509.631999999285 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.476000010967255
to: 0.523999989032745 [s; relative to TRIGTIME]
Total Fluence
Measured from: -218.483999997377
to: 538.080000013113 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 12.978336 11.565183 3.105738 0.289932
0.159583 0.148021 0.126646 0.113993 [error]
Peak 6.174356 5.852229 1.292079 0.027527
0.032418 0.031389 0.015424 0.004529 [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 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 Power-law 1.51e+02 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
Fluence Cutoff-PL 3.71e-06 4.81e-06 2.33e-06 3.19e-07 1.11e-05 1.12e-05 erg/cm2
Error 2.46e-07 1.34e-07 1.60e-07 1.11e-07 3.93e-07 4.11e-07 erg/cm2
Peak flux Cutoff-PL 5.82e+01 4.44e+01 9.47e+00 3.84e-01 1.12e+02 1.12e+02 ph/cm2/s
Error 3.12e+00 8.68e-01 2.08e-01 4.19e-02 3.56e+00 3.57e+00 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 2.654 0.000 - - 1.63e-03 0.00e+00 144.550 57
CPL 0.891 0.343 25.5 3.2 1.61e-02 7.50e-03 33.260 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 3.281 0.000 - - 4.43e-01 0.00e+00 1173.790 57
CPL 0.369 0.190 26.9 1.4 1.35e+01 2.99e+00 38.960 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: 540.864000 sec.
T50 in the 50-300 keV band: 509.632000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 756.564 -218.484 538.080
T90 509.700 -0.016 509.684
T50 509.580 0.052 509.632
Peak 1.000 -0.476 0.524
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
237.7710 -54.3046 0.0118 0.0 -141.0 26.2655 16.3 TRIG_00340603
------------------------------------------
Foreground time interval of the image:
-218.484 538.080 (delta_t = 756.564 [sec])
Background time interval of the image:
-239.440 -218.484 (delta_t = 20.956 [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 -218.484 sec. to 538.080 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.65368 ( )
Norm@50keV : 1.63060E-03 ( )
------------------------------------------------------------
# Chi-Squared = 144.55 using 59 PHA bins.
# Reduced chi-squared = 2.5359 for 57 degrees of freedom
# Null hypothesis probability = 1.506582e-09
Photon flux (15-150 keV) in 756.6 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Cutoff power-law model
Time interval is from -218.484 sec. to 538.080 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.890755 ( -0.354298 0.331257 )
Epeak [keV] : 25.5163 ( -3.64215 2.72806 )
Norm@50keV : 1.60698E-02 ( -0.00559521 0.00940195 )
------------------------------------------------------------
# Chi-Squared = 33.26 using 59 PHA bins.
# Reduced chi-squared = 0.5939 for 56 degrees of freedom
# Null hypothesis probability = 9.932763e-01
Photon flux (15-150 keV) in 756.6 sec: 0.307053 ( -0.012293 0.012432 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.11333e-05 ( -3.89346e-07 3.96231e-07 ) ergs/cm2
Band function
Time interval is from -218.484 sec. to 538.080 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.774719 ( -0.409543 0.557756 )
beta : -4.05935 ( 4.0526 0.617585 )
Epeak [keV] : 26.1166 ( -3.79858 2.70186 )
Norm@50keV : 1.89904E-02 ( -0.00773042 0.0225933 )
------------------------------------------------------------
# Chi-Squared = 32.50 using 59 PHA bins.
# Reduced chi-squared = 0.5910 for 55 degrees of freedom
# Null hypothesis probability = 9.932468e-01
Photon flux (15-150 keV) in 756.6 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] : ( )
R^2/D10^2 : ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : ( )
Norm : ( )
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : ( )
R1^2/D10^2 : ( )
kT2 [keV] : ( )
R2^2/D10^2 : ( )
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Peak spectrum fit
Power-law model
Time interval is from -0.476 sec. to 0.524 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.28136 ( )
Norm@50keV : 0.442837 ( )
------------------------------------------------------------
# Chi-Squared = 1173.79 using 59 PHA bins.
# Reduced chi-squared = 20.5928 for 57 degrees of freedom
# Null hypothesis probability = 3.257583e-208
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.476 sec. to 0.524 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.369187 ( -0.192656 0.186426 )
Epeak [keV] : 26.9364 ( -1.48257 1.35645 )
Norm@50keV : 13.5224 ( -2.60982 3.36243 )
------------------------------------------------------------
# Chi-Squared = 38.96 using 59 PHA bins.
# Reduced chi-squared = 0.6958 for 56 degrees of freedom
# Null hypothesis probability = 9.595148e-01
Photon flux (15-150 keV) in 1 sec: 112.455 ( -3.54 3.588 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.25045e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from -0.476 sec. to 0.524 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.326693 ( -0.213857 0.330735 )
beta : -6.26323 ( 5.40654 0.196527 )
Epeak [keV] : 27.1499 ( -1.60898 1.71199 )
Norm@50keV : 14.2939 ( -3.3029 7.26093 )
------------------------------------------------------------
# Chi-Squared = 38.45 using 59 PHA bins.
# Reduced chi-squared = 0.6990 for 55 degrees of freedom
# Null hypothesis probability = 9.560467e-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] : ( )
R^2/D10^2 : ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : ( )
Norm : ( )
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : ( )
R1^2/D10^2 : ( )
kT2 [keV] : ( )
R2^2/D10^2 : ( )
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Plot creation:
Fri Jun 3 16:01:59 EDT 2011