batgrbproduct Analysis for Trigger=433065
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 Sep 1 23:49:30 EDT 2010
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger433065/GCN5_download_cron
======================================================================
Trigger: 00433065 Segment: 000
BAT Trigger Time: 305040856.512 [s; MET]
Trigger Stop: 305040864.704 [s; MET]
UTC: 2010-09-01T13:34:10.376100 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 27.2446729253292 Dec: 22.7443520105249 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.7
Image Trigger?: NO
Rate S/N Ratio: 10.1980390271856 [ if not an image trigger ]
Image S/N Ratio: 7.7
Flight Position: [ source = BAT ]
RA: 27.2446729253292 Dec: 22.7443520105249 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 27.2467555377376 Dec: 22.7451933646521 [deg; J2000]
{ 01h 48m 59.2s , +22d 44' 42.7" }
+/- 3.53403247410258 [arcmin] (estimated 90% radius based on SNR)
+/- 2.33633160390785 [arcmin] (formal 1-sigma fit error)
SNR: 5.01042721059953
Angular difference between Flight and Ground position is 0.125811 arcmin
Partial Coding Fraction: 0.4023438 [ including projection effects ]
Duration
T90: 436.531999945641 +/- 22.5629902448915
Measured from: 0.372000098228455
to: 436.904000043869 [s; relative to TRIGTIME]
T50: 189.371999979019 +/- 194.198659809575
Measured from: 201.092000067234
to: 390.464000046253 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -1.80800002813339
to: -0.808000028133392 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.86400002241135
to: 458.423999965191 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.823723 1.142694 0.902886 0.226849
0.117755 0.122737 0.110747 0.101615 [error]
Peak 0.029280 0.034407 0.016532 0.014141
0.008345 0.008604 0.007799 0.007138 [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 2.81e-07 5.10e-07 7.10e-07 2.06e-06 2.04e-06 3.56e-06 erg/cm2
Error 5.55e-08 6.13e-08 1.09e-07 6.83e-07 2.62e-07 7.66e-07 erg/cm2
Peak flux Power-law 3.24e-01 2.66e-01 1.48e-01 1.22e-01 7.92e-01 8.59e-01 ph/cm2/s
Error 1.45e-01 7.32e-02 6.77e-02 1.17e-01 2.19e-01 2.39e-01 ph/cm2/s
Fluence Cutoff-PL 2.81e-07 5.11e-07 7.11e-07 2.05e-06 2.04e-06 3.57e-06 erg/cm2
Error 5.56e-08 6.13e-08 1.09e-07 6.78e-07 2.62e-07 7.61e-07 erg/cm2
Peak flux Cutoff-PL 3.23e-01 2.66e-01 1.48e-01 1.21e-01 7.91e-01 8.58e-01 ph/cm2/s
Error 1.45e-01 7.32e-02 6.78e-02 2.39e-01 0.00e+00 0.00e+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 1.523 0.204 - - 4.70e-04 5.52e-05 48.970 57
CPL 1.520 0.526 9999.7 0.0 4.71e-04 3.54e-04 48.980 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 1.843 0.605 - - 5.65e-03 1.93e-03 56.680 57
CPL 2.470 0.000 166.9 0.0 2.61e-03 0.00e+00 55.530 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: 23.104000 sec.
T50 in the 50-300 keV band: 11.776000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 460.288 -1.864 458.424
T90 436.532 0.372 436.904
T50 189.372 201.092 390.464
Peak 1.000 -1.808 -0.808
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
27.2468 +22.7452 0.0384 41.0 165.7 0.6560 5.0 TRIG_00433065
------------------------------------------
Foreground time interval of the image:
-1.864 51.389 (delta_t = 53.253 [sec])
Background time interval of the image:
-239.512 -68.772 (delta_t = 170.740 [sec])
-67.512 -56.973 (delta_t = 10.539 [sec])
-55.512 -1.864 (delta_t = 53.648 [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
Multiple GTIs in the spectrum
tstart tstop
-1.864000 56.178000
57.488000 458.424000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.52253 ( -0.203375 0.204805 )
Norm@50keV : 4.70081E-04 ( -5.54172e-05 5.50227e-05 )
------------------------------------------------------------
# Chi-Squared = 48.97 using 59 PHA bins.
# Reduced chi-squared = 0.8592 for 57 degrees of freedom
# Null hypothesis probability = 7.663817e-01
Photon flux (15-150 keV) in 459 sec: 5.90474E-02 ( -0.00691958 0.00693567 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.03955e-06 ( -2.60802e-07 2.63398e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-1.864000 56.178000
57.488000 458.424000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.52022 ( -0.686336 0.36598 )
Epeak [keV] : 9999.72 ( )
Norm@50keV : 4.71431E-04 ( -0.000117858 0.000589223 )
------------------------------------------------------------
# Chi-Squared = 48.98 using 59 PHA bins.
# Reduced chi-squared = 0.8746 for 56 degrees of freedom
# Null hypothesis probability = 7.356362e-01
Photon flux (15-150 keV) in 459 sec: 5.90284E-02 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.03974e-06 ( -2.60882e-07 2.63489e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-1.864000 56.178000
57.488000 458.424000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99460 ( -355.565 -355.565 )
beta : -1.63717 ( -0.306163 0.220716 )
Epeak [keV] : 25.2255 ( -25.2099 4.89312 )
Norm@50keV : 48.4424 ( -31.5355 61.851 )
------------------------------------------------------------
# Chi-Squared = 46.84 using 59 PHA bins.
# Reduced chi-squared = 0.8517 for 55 degrees of freedom
# Null hypothesis probability = 7.750403e-01
Photon flux (15-150 keV) in 459 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 -1.808 sec. to -0.808 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.84343 ( -0.567104 0.642755 )
Norm@50keV : 5.64577E-03 ( -0.00204916 0.00181929 )
------------------------------------------------------------
# Chi-Squared = 56.68 using 59 PHA bins.
# Reduced chi-squared = 0.9943 for 57 degrees of freedom
# Null hypothesis probability = 4.871387e-01
Photon flux (15-150 keV) in 1 sec: 0.791546 ( -0.218874 0.218637 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.19158e-08 ( -1.73692e-08 1.79277e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.808 sec. to -0.808 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.46998 ( )
Epeak [keV] : 166.940 ( )
Norm@50keV : 2.61394E-03 ( )
------------------------------------------------------------
# Chi-Squared = 55.53 using 59 PHA bins.
# Reduced chi-squared = 0.9917 for 56 degrees of freedom
# Null hypothesis probability = 4.924808e-01
Photon flux (15-150 keV) in 1 sec: 0.791194 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.1897e-08 ( -1.73716e-08 1.79347e-08 ) ergs/cm2
Band function
Time interval is from -1.808 sec. to -0.808 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.47312 ( 1.47317 1.47317 )
beta : -1.84342 ( 1.84356 0.566934 )
Epeak [keV] : 13.6235 ( -13.6128 -13.6128 )
Norm@50keV : 1.50826E-02 ( -0.015085 3.23589e+06 )
------------------------------------------------------------
# Chi-Squared = 56.68 using 59 PHA bins.
# Reduced chi-squared = 1.030 for 55 degrees of freedom
# Null hypothesis probability = 4.122382e-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:
Thu Sep 2 00:13:34 EDT 2010