batgrbproduct Analysis for Trigger=348013
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 Jun 2 13:27:12 EDT 2011
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger348013/SDC
======================================================================
Trigger: 00348013 Segment: 000
BAT Trigger Time: 260128637.308 [s; MET]
Trigger Stop: 260128637.372 [s; MET]
UTC: 2009-03-30T17:57:12.690100 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 119.093137887545 Dec: 43.34186628848 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.15
Image Trigger?: NO
Rate S/N Ratio: 6.08276253029822 [ if not an image trigger ]
Image S/N Ratio: 6.15
Flight Position: [ source = BAT ]
RA: 119.093137887545 Dec: 43.34186628848 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 119.071708292178 Dec: 43.2977677027185 [deg; J2000]
{ 07h 56m 17.2s , +43d 17' 52.0" }
+/- 3.60985121968711 [arcmin] (estimated 90% radius based on SNR)
+/- 1.40044772910016 [arcmin] (formal 1-sigma fit error)
SNR: 4.86077020703974
Angular difference between Flight and Ground position is 2.806409 arcmin
Partial Coding Fraction: 0.9765625 [ including projection effects ]
Duration
T90: 0.0640000104904175 +/-
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
T50: 0.0640000104904175 +/-
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.0640000104904175 second)
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total -0.000233 0.005805 0.004484 0.000405
0.001135 0.001344 0.001316 0.001030 [error]
Peak -0.000233 0.005805 0.004484 0.000405
0.001135 0.001344 0.001316 0.001030 [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 5.04e-10 4.49e-10 2.76e-10 2.56e-10 1.34e-09 1.49e-09 erg/cm2
Error 4.42e-10 3.70e-10 2.79e-10 3.64e-10 1.10e-09 1.25e-09 erg/cm2
Peak flux Power-law 2.61e-01 1.30e-01 3.99e-02 1.56e-02 4.39e-01 4.46e-01 ph/cm2/s
Error 2.30e-01 1.07e-01 3.93e-02 2.09e-02 3.64e-01 3.68e-01 ph/cm2/s
Fluence Cutoff-PL 2.16e-10 2.10e-09 1.70e-09 3.18e-11 4.05e-09 4.05e-09 erg/cm2
Error 2.89e-10 8.59e-10 1.19e-09 9.78e-11 1.50e-09 1.50e-09 erg/cm2
Peak flux Cutoff-PL 9.99e-02 5.46e-01 2.66e-01 2.85e-03 9.15e-01 9.15e-01 ph/cm2/s
Error 1.38e-01 2.40e-01 1.74e-01 8.42e-03 3.49e-01 3.49e-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 1.43e-01 9.62e-01 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 3.29e-01 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 2.672 1.158 - - 1.99e-03 1.85e-03 76.000 57
CPL -5.677 0.000 49.0 7.5 4.40e+01 7.21e+03 55.320 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 2.672 1.158 - - 1.99e-03 1.85e-03 76.000 57
CPL -5.677 0.000 49.0 7.5 4.40e+01 7.21e+03 55.320 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
119.0717 +43.2978 0.0395 20.8 -153.5 0.0120 4.9 TRIG_00348013
------------------------------------------
Foreground time interval of the image:
0.000 0.064 (delta_t = 0.064 [sec])
Background time interval of the image:
-54.207 -5.308 (delta_t = 48.899 [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: 2.67242 ( -0.84873 1.46739 )
Norm@50keV : 1.98737E-03 ( -0.00198362 0.00172253 )
------------------------------------------------------------
# Chi-Squared = 76.00 using 59 PHA bins.
# Reduced chi-squared = 1.333 for 57 degrees of freedom
# Null hypothesis probability = 4.706795e-02
Photon flux (15-150 keV) in 0.064 sec: 0.439281 ( -0.362389 0.365684 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.33783e-09 ( -1.10067e-09 1.10011e-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: -5.67686 ( )
Epeak [keV] : 48.9876 ( -9.80904 5.2903 )
Norm@50keV : 43.9529 ( -50.3338 14374 )
------------------------------------------------------------
# Chi-Squared = 55.32 using 59 PHA bins.
# Reduced chi-squared = 0.9878 for 56 degrees of freedom
# Null hypothesis probability = 5.006407e-01
Photon flux (15-150 keV) in 0.064 sec: 0.914828 ( -0.338666 0.358692 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.04572e-09 ( -1.48534e-09 1.51832e-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 : 4.99988 ( -16167.1 -16152.1 )
beta : -9.98738 ( 257.237 267.237 )
Epeak [keV] : 48.9916 ( -8.86481 8.58706 )
Norm@50keV : 21.4240 ( -21.424 56.5582 )
------------------------------------------------------------
# Chi-Squared = 55.54 using 59 PHA bins.
# Reduced chi-squared = 1.010 for 55 degrees of freedom
# Null hypothesis probability = 4.541254e-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] : ( )
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 0.000 sec. to 0.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.67242 ( -0.84873 1.46739 )
Norm@50keV : 1.98737E-03 ( -0.00198362 0.00172253 )
------------------------------------------------------------
# Chi-Squared = 76.00 using 59 PHA bins.
# Reduced chi-squared = 1.333 for 57 degrees of freedom
# Null hypothesis probability = 4.706795e-02
Photon flux (15-150 keV) in 0.064 sec: 0.439281 ( -0.362389 0.365684 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.33783e-09 ( -1.10067e-09 1.10011e-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: -5.67686 ( )
Epeak [keV] : 48.9876 ( -9.80904 5.2903 )
Norm@50keV : 43.9529 ( -50.3338 14374 )
------------------------------------------------------------
# Chi-Squared = 55.32 using 59 PHA bins.
# Reduced chi-squared = 0.9878 for 56 degrees of freedom
# Null hypothesis probability = 5.006407e-01
Photon flux (15-150 keV) in 0.064 sec: 0.914828 ( -0.338666 0.358692 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.04572e-09 ( -1.48534e-09 1.51832e-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 : 4.99995 ( -37553.1 -37538.1 )
beta : -9.98743 ( 258.19 268.19 )
Epeak [keV] : 48.9932 ( -8.86643 8.58553 )
Norm@50keV : 21.4211 ( -21.421 56.5669 )
------------------------------------------------------------
# Chi-Squared = 55.54 using 59 PHA bins.
# Reduced chi-squared = 1.010 for 55 degrees of freedom
# Null hypothesis probability = 4.541262e-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] : ( )
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:
Thu Jun 2 13:34:08 EDT 2011