batgrbproduct Analysis for Trigger=505646
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): Mon Oct 17 17:44:51 EDT 2011
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger505646/GCN5_download_cron
======================================================================
Trigger: 00505646 Segment: 000
BAT Trigger Time: 340483032 [s; MET]
Trigger Stop: 340483136 [s; MET]
UTC: 2011-10-16T18:37:04.526260 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 153.806002279747 Dec: 27.4756888348294 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.49
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.49
Flight Position: [ source = BAT ]
RA: 153.806002279747 Dec: 27.4756888348294 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 153.825613731605 Dec: 27.4741765751893 [deg; J2000]
{ 10h 15m 18.1s , +27d 28' 27.0" }
+/- 2.24229158773504 [arcmin] (estimated 90% radius based on SNR)
+/- 0.789468213170983 [arcmin] (formal 1-sigma fit error)
SNR: 9.59687158093567
Angular difference between Flight and Ground position is 1.047907 arcmin
Partial Coding Fraction: 0.640625 [ including projection effects ]
Duration
T90: 547.483999967575 +/- 105.374638318265
Measured from: 45.8800001144409
to: 593.364000082016 [s; relative to TRIGTIME]
T50: 108.763999998569 +/- 18.1855933957083
Measured from: 117.960000097752
to: 226.724000096321 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 115.227999985218
to: 116.227999985218 [s; relative to TRIGTIME]
Total Fluence
Measured from: 35.4160000085831
to: 614.480000019073 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.800997 2.586014 1.627268 0.610166
0.130045 0.135088 0.121815 0.111890 [error]
Peak 0.031896 0.032088 0.039114 0.008195
0.006898 0.007402 0.006592 0.005726 [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 8.59e-07 1.20e-06 1.23e-06 2.33e-06 4.03e-06 5.62e-06 erg/cm2
Error 8.23e-08 6.96e-08 1.23e-07 4.87e-07 2.73e-07 5.95e-07 erg/cm2
Peak flux Power-law 2.98e-01 3.01e-01 2.14e-01 2.42e-01 9.09e-01 1.06e+00 ph/cm2/s
Error 9.61e-02 6.09e-02 5.33e-02 1.23e-01 1.76e-01 2.07e-01 ph/cm2/s
Fluence Cutoff-PL 8.59e-07 1.20e-06 1.23e-06 2.31e-06 4.03e-06 5.43e-06 erg/cm2
Error 8.21e-08 6.97e-08 1.23e-07 4.88e-07 2.73e-07 8.04e-07 erg/cm2
Peak flux Cutoff-PL 2.68e-01 3.14e-01 2.26e-01 1.50e-01 8.91e-01 9.62e-01 ph/cm2/s
Error 1.20e-01 7.04e-02 6.36e-02 1.80e-01 1.82e-01 2.56e-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 2.66e-01 3.15e-01 9.55e-01 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 1.16e-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 1.955 0.122 - - 7.63e-04 5.34e-05 43.680 57
CPL 2.086 0.000 39.6 0.0 6.46e-04 0.00e+00 42.710 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.493 0.335 - - 7.29e-03 1.45e-03 48.760 57
CPL 0.991 1.522 107.1 0.0 1.27e-02 3.20e-02 48.310 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: 206.528000 sec.
T50 in the 50-300 keV band: 83.328000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 579.064 35.416 614.480
T90 547.484 45.880 593.364
T50 108.764 117.960 226.724
Peak 1.000 115.228 116.228
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
153.8256 +27.4742 0.0200 32.2 15.5 1.2089 9.6 TRIG_00505646
------------------------------------------
Foreground time interval of the image:
35.416 110.701 (delta_t = 75.285 [sec])
Background time interval of the image:
-239.000 35.416 (delta_t = 274.416 [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
35.416000 176.300000
177.000000 248.270000
249.000000 501.610000
504.000000 507.460000
509.000000 614.480000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.95510 ( -0.120222 0.123308 )
Norm@50keV : 7.63296E-04 ( -5.38003e-05 5.29517e-05 )
------------------------------------------------------------
# Chi-Squared = 43.68 using 59 PHA bins.
# Reduced chi-squared = 0.7662 for 57 degrees of freedom
# Null hypothesis probability = 9.027191e-01
Photon flux (15-150 keV) in 573.7 sec: 0.112194 ( -0.00672358 0.0067482 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.03054e-06 ( -2.71591e-07 2.7448e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
35.416000 176.300000
177.000000 248.270000
249.000000 501.610000
504.000000 507.460000
509.000000 614.480000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.08575 ( )
Epeak [keV] : 39.5605 ( )
Norm@50keV : 6.45838E-04 ( )
------------------------------------------------------------
# Chi-Squared = 42.71 using 59 PHA bins.
# Reduced chi-squared = 0.7627 for 56 degrees of freedom
# Null hypothesis probability = 9.043843e-01
Photon flux (15-150 keV) in 573.7 sec: 0.112140 ( -0.006688 0.006677 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.02979e-06 ( -2.70867e-07 2.74842e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
35.416000 176.300000
177.000000 248.270000
249.000000 501.610000
504.000000 507.460000
509.000000 614.480000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.51044 ( 1.50727 1.50727 )
beta : -1.95734 ( 1.9573 0.121966 )
Epeak [keV] : 21.3685 ( -21.3294 -21.3294 )
Norm@50keV : 1.81735E-03 ( -0.00113466 0 )
------------------------------------------------------------
# Chi-Squared = 43.66 using 59 PHA bins.
# Reduced chi-squared = 0.7937 for 55 degrees of freedom
# Null hypothesis probability = 8.647073e-01
Photon flux (15-150 keV) in 573.7 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] : 10.7104 ( )
R^2/D10^2 : 3.75444E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 138.06 using 59 PHA bins.
# Reduced chi-squared = 2.4221 for 57 degrees of freedom
# Null hypothesis probability = 1.122646e-08
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.133e-07 5.450e-08
25- 50 1.402e-06 9.036e-08
50-150 8.894e-07 1.449e-07
15-150 2.804e-06 1.842e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 80.7209 (-16.1827 23.2368)
Norm : 0.511218 (-0.0497737 0.0581133)
------------------------------------------------------------
# Chi-Squared = 53.94 using 59 PHA bins.
# Reduced chi-squared = 0.9464 for 57 degrees of freedom
# Null hypothesis probability = 5.904710e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.615e-07 6.856e-08
25- 50 1.256e-06 7.515e-08
50-150 1.784e-06 2.777e-07
15-150 3.802e-06 2.960e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.35892 (-0.921848 1.088)
R1^2/D10^2 : 0.422828 (-0.214916 0.51068)
kT2 [keV] : 22.2251 (-4.20053 7.04385)
R2^2/D10^2 : 1.91744E-03 (-0.00118755 0.00231513)
------------------------------------------------------------
# Chi-Squared = 49.07 using 59 PHA bins.
# Reduced chi-squared = 0.8922 for 55 degrees of freedom
# Null hypothesis probability = 6.994248e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.724e-07 1.626e-07
25- 50 1.129e-06 1.687e-07
50-150 1.999e-06 5.290e-07
15-150 4.000e-06 8.198e-07
Peak spectrum fit
Power-law model
Time interval is from 115.228 sec. to 116.228 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.49343 ( -0.327999 0.341569 )
Norm@50keV : 7.29143E-03 ( -0.00145596 0.00143491 )
------------------------------------------------------------
# Chi-Squared = 48.76 using 59 PHA bins.
# Reduced chi-squared = 0.8554 for 57 degrees of freedom
# Null hypothesis probability = 7.731117e-01
Photon flux (15-150 keV) in 1 sec: 0.908659 ( -0.17569 0.176042 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.92448e-08 ( -1.50183e-08 1.52578e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 115.228 sec. to 116.228 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.990822 ( -1.64314 1.40056 )
Epeak [keV] : 107.072 ( -107.099 -107.099 )
Norm@50keV : 1.27427E-02 ( -0.00676241 0.057332 )
------------------------------------------------------------
# Chi-Squared = 48.31 using 59 PHA bins.
# Reduced chi-squared = 0.8626 for 56 degrees of freedom
# Null hypothesis probability = 7.578430e-01
Photon flux (15-150 keV) in 1 sec: 0.890951 ( -0.183414 0.181359 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.78001e-08 ( -1.53602e-08 1.5703e-08 ) ergs/cm2
Band function
Time interval is from 115.228 sec. to 116.228 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.926698 ( 0.926974 1.55115 )
beta : -9.36553 ( 9.99712 19.9971 )
Epeak [keV] : 101.513 ( -44.48 -101.69 )
Norm@50keV : 1.36323E-02 ( -0.0076317 0 )
------------------------------------------------------------
# Chi-Squared = 48.31 using 59 PHA bins.
# Reduced chi-squared = 0.8784 for 55 degrees of freedom
# Null hypothesis probability = 7.261277e-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] : 17.0299 (-3.42268 4.41776)
R^2/D10^2 : 6.86706E-02 (-0.0378051 0.079787)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 53.00 using 59 PHA bins.
# Reduced chi-squared = 0.9298 for 57 degrees of freedom
# Null hypothesis probability = 6.259797e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.054e-09 1.609e-09
25- 50 1.796e-08 6.159e-09
50-150 3.722e-08 1.544e-08
15-150 5.923e-08 2.023e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-102.911 -199.995)
Norm : 3.73192 (-0.7098 0.71057)
------------------------------------------------------------
# Chi-Squared = 48.59 using 59 PHA bins.
# Reduced chi-squared = 0.8524 for 57 degrees of freedom
# Null hypothesis probability = 7.785062e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.293e-09 5.195e-09
25- 50 1.788e-08 1.009e-08
50-150 3.920e-08 2.192e-08
15-150 6.637e-08 3.797e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.33515 (-1.7498 2.86715)
R1^2/D10^2 : 19.7220 (-18.6823 3193.99)
kT2 [keV] : 20.2828 (-4.54235 7.15158)
R2^2/D10^2 : 3.45731E-02 (-0.0226295 0.0495514)
------------------------------------------------------------
# Chi-Squared = 44.87 using 59 PHA bins.
# Reduced chi-squared = 0.8158 for 55 degrees of freedom
# Null hypothesis probability = 8.334463e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.640e-09 5.373e-09
25- 50 1.514e-08 7.983e-09
50-150 4.188e-08 2.546e-08
15-150 6.667e-08 3.568e-08
Plot creation:
Mon Oct 17 18:06:36 EDT 2011