batgrbproduct Analysis for Trigger=419404
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 page will be updated for up to 8 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.45
Process Start Time (local time): Thu Apr 15 03:38:15 EDT 2010
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger419404/SDC
======================================================================
Trigger: 00419404 Segment: 000
BAT Trigger Time: 292872814.08 [s; MET]
Trigger Stop: 292872830.464 [s; MET]
UTC: 2010-04-13T17:33:28.376380 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 266.217404254234 Dec: 15.8373523553948 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.59
Image Trigger?: NO
Rate S/N Ratio: 10.9544511501033 [ if not an image trigger ]
Image S/N Ratio: 10.59
Flight Position: [ source = BAT ]
RA: 266.217404254234 Dec: 15.8373523553948 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 266.223474653576 Dec: 15.8346087720936 [deg; J2000]
{ 17h 44m 53.6s , +15d 50' 04.6" }
+/- 1.4767778538326 [arcmin] (estimated 90% radius based on SNR)
+/- 0.570687719238142 [arcmin] (formal 1-sigma fit error)
SNR: 17.4276794933081
Angular difference between Flight and Ground position is 0.387142 arcmin
Partial Coding Fraction: 0.4882812 [ including projection effects ]
Duration
T90: 191.179999947548 +/- 11.6036383576115
Measured from: 9.94400000572205
to: 201.12399995327 [s; relative to TRIGTIME]
T50: 105.287999987602 +/- 6.87675066404159
Measured from: 45
to: 150.287999987602 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 116.780000030994
to: 117.780000030994 [s; relative to TRIGTIME]
Total Fluence
Measured from: -3.40799999237061
to: 227.448000013828 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.019688 2.875445 3.025016 0.932731
0.113491 0.102735 0.089589 0.075364 [error]
Peak 0.016841 0.027920 0.032573 0.026463
0.005762 0.005569 0.005223 0.004272 [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 6.22e-07 1.33e-06 2.24e-06 8.63e-06 6.16e-06 1.28e-05 erg/cm2
Error 4.93e-08 6.13e-08 8.76e-08 8.08e-07 2.25e-07 8.36e-07 erg/cm2
Peak flux Power-law 1.43e-01 2.06e-01 2.21e-01 4.43e-01 7.07e-01 1.01e+00 ph/cm2/s
Error 6.31e-02 5.50e-02 3.96e-02 1.85e-01 1.38e-01 1.93e-01 ph/cm2/s
Fluence Cutoff-PL 6.04e-07 1.34e-06 2.27e-06 1.18e-05 0.00e+00 0.00e+00 erg/cm2
Error 6.52e-08 6.21e-08 1.07e-07 1.79e-06 0.00e+00 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.42e-01 2.06e-01 2.22e-01 4.40e-01 7.07e-01 1.01e+00 ph/cm2/s
Error 6.30e-02 5.51e-02 3.97e-02 1.84e-01 1.38e-01 1.92e-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 1.249 0.067 - - 2.67e-03 9.65e-05 59.630 57
CPL 1.162 0.219 580.3 0.0 2.90e-03 0.00e+00 59.210 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.896 0.349 - - 6.16e-03 1.21e-03 62.460 57
CPL 0.827 0.000 982.1 0.0 6.62e-03 0.00e+00 62.580 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: 172.032000 sec.
T50 in the 50-300 keV band: 100.992000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 230.856 -3.408 227.448
T90 191.180 9.944 201.124
T50 105.288 45.000 150.288
Peak 1.000 116.780 117.780
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
266.2235 +15.8346 0.0110 38.2 166.1 2.7661 17.4 TRIG_00419404
------------------------------------------
Foreground time interval of the image:
-3.408 64.021 (delta_t = 67.429 [sec])
Background time interval of the image:
-239.080 -3.408 (delta_t = 235.672 [sec])
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 3) 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.
- 4) 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.
- 5) 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 -3.408 sec. to 227.448 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.24930 ( -0.067488 0.0670098 )
Norm@50keV : 2.66658E-03 ( -9.66506e-05 9.63363e-05 )
------------------------------------------------------------
# Chi-Squared = 59.63 using 59 PHA bins.
# Reduced chi-squared = 1.046 for 57 degrees of freedom
# Null hypothesis probability = 3.801287e-01
Photon flux (15-150 keV) in 230.9 sec: 0.315348 ( -0.0126228 0.0126822 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.16314e-06 ( -2.24364e-07 2.2468e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -3.408 sec. to 227.448 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.16207 ( -0.246325 0.191032 )
Epeak [keV] : 580.336 ( -402.158 -402.158 )
Norm@50keV : 2.90164E-03 ( )
------------------------------------------------------------
# Chi-Squared = 59.21 using 59 PHA bins.
# Reduced chi-squared = 1.057 for 56 degrees of freedom
# Null hypothesis probability = 3.592716e-01
Photon flux (15-150 keV) in 230.9 sec: 0.315183 ( -0.012616 0.012675 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from -3.408 sec. to 227.448 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.24469 ( 1.03325 1.03325 )
beta : -9.23498 ( -0.0670032 0.0675014 )
Epeak [keV] : 10000.00 ( -7.53962e+07 -7.53962e+07 )
Norm@50keV : 2.67809E-03 ( -9.68164e-05 9.65269e-05 )
------------------------------------------------------------
# Chi-Squared = 59.59 using 59 PHA bins.
# Reduced chi-squared = 1.084 for 55 degrees of freedom
# Null hypothesis probability = 3.121952e-01
Photon flux (15-150 keV) in 230.9 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] : 21.0748 ( )
R^2/D10^2 : 1.17617E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 199.73 using 59 PHA bins.
# Reduced chi-squared = 3.5041 for 57 degrees of freedom
# Null hypothesis probability = 9.811622e-18
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.275e-07 1.794e-08
25- 50 1.172e-06 6.615e-08
50-150 3.881e-06 2.067e-07
15-150 5.281e-06 2.147e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 1.36212 ( )
------------------------------------------------------------
# Chi-Squared = 133.19 using 59 PHA bins.
# Reduced chi-squared = 2.3366 for 57 degrees of freedom
# Null hypothesis probability = 4.883066e-08
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.832e-07 4.000e-07
25- 50 1.507e-06 7.696e-07
50-150 3.304e-06 1.696e-06
15-150 5.594e-06 2.869e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.72570 (-1.03227 1.69694)
R1^2/D10^2 : 0.302353 (-0.158844 0.27547)
kT2 [keV] : 29.1140 (-2.5029 4.85094)
R2^2/D10^2 : 3.59173E-03 (-0.00145066 0.00131428)
------------------------------------------------------------
# Chi-Squared = 64.01 using 59 PHA bins.
# Reduced chi-squared = 1.164 for 55 degrees of freedom
# Null hypothesis probability = 1.897143e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.978e-07 1.268e-07
25- 50 1.297e-06 1.688e-07
50-150 4.219e-06 8.647e-07
15-150 6.114e-06 8.578e-07
Peak spectrum fit
Power-law model
Time interval is from 116.780 sec. to 117.780 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.896311 ( -0.366177 0.331088 )
Norm@50keV : 6.16134E-03 ( -0.00123323 0.00118279 )
------------------------------------------------------------
# Chi-Squared = 62.46 using 59 PHA bins.
# Reduced chi-squared = 1.096 for 57 degrees of freedom
# Null hypothesis probability = 2.885242e-01
Photon flux (15-150 keV) in 1 sec: 0.707180 ( -0.137533 0.139236 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.92461e-08 ( -1.26008e-08 1.26125e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 116.780 sec. to 117.780 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.826903 ( )
Epeak [keV] : 982.076 ( )
Norm@50keV : 6.61592E-03 ( )
------------------------------------------------------------
# Chi-Squared = 62.58 using 59 PHA bins.
# Reduced chi-squared = 1.117 for 56 degrees of freedom
# Null hypothesis probability = 2.542281e-01
Photon flux (15-150 keV) in 1 sec: 0.706916 ( -0.137464 0.139194 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.92688e-08 ( -1.25792e-08 1.26268e-08 ) ergs/cm2
Band function
Time interval is from 116.780 sec. to 117.780 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.790147 ( 0.790152 0.790152 )
beta : -0.896306 ( -0.33061 0.366299 )
Epeak [keV] : 24.3301 ( -24.3253 -24.3253 )
Norm@50keV : 9.57577E-03 ( -0.00452379 8458.38 )
------------------------------------------------------------
# Chi-Squared = 62.46 using 59 PHA bins.
# Reduced chi-squared = 1.136 for 55 degrees of freedom
# Null hypothesis probability = 2.283858e-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] : 24.8651 (-5.94548 10.2026)
R^2/D10^2 : 1.73741E-02 (-0.0111045 0.0239952)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 69.38 using 59 PHA bins.
# Reduced chi-squared = 1.217 for 57 degrees of freedom
# Null hypothesis probability = 1.257793e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.871e-09 8.150e-10
25- 50 1.059e-08 3.887e-09
50-150 4.858e-08 1.622e-08
15-150 6.104e-08 1.984e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.998 ( )
Norm : 3.04026 (-3.04026 -3.04026)
------------------------------------------------------------
# Chi-Squared = 73.99 using 59 PHA bins.
# Reduced chi-squared = 1.298 for 57 degrees of freedom
# Null hypothesis probability = 6.459043e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.570e-09 4.279e-09
25- 50 1.456e-08 8.130e-09
50-150 3.194e-08 1.770e-08
15-150 5.407e-08 3.040e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 13.3268 (-4.36832 6.89762)
R1^2/D10^2 : 8.91486E-02 ( )
kT2 [keV] : 184.157 (-104.094 -104.094)
R2^2/D10^2 : 1.59152E-04 (-3.91909e-05 0.00316292)
------------------------------------------------------------
# Chi-Squared = 61.07 using 59 PHA bins.
# Chi-Squared = 60.67 using 59 PHA bins.
# Reduced chi-squared = 1.110 for 55 degrees of freedom
# Reduced chi-squared = 1.103 for 55 degrees of freedom
# Null hypothesis probability = 2.669401e-01
# Null hypothesis probability = 2.788949e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.616e-09 2.507e-09
25- 50 1.332e-08 1.327e-08
50-150 5.213e-08 2.319e-07
15-150 6.907e-08 2.504e-07
Plot creation:
Thu Apr 15 17:38:31 EDT 2010