batgrbproduct Analysis for Trigger=419015
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): Sun Apr 11 14:16:28 EDT 2010
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger419015/GCN5_download_cron
======================================================================
Trigger: 00419015 Segment: 000
BAT Trigger Time: 292577266.24 [s; MET]
Trigger Stop: 292577267.264 [s; MET]
UTC: 2010-04-10T07:27:40.546740 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 293.31015696162 Dec: -34.3087131523313 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.29
Image Trigger?: NO
Rate S/N Ratio: 17.6635217326557 [ if not an image trigger ]
Image S/N Ratio: 7.29
Flight Position: [ source = BAT ]
RA: 293.31015696162 Dec: -34.3087131523313 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 293.325081692273 Dec: -34.3196326539268 [deg; J2000]
{ 19h 33m 18.0s , -34d 19' 10.7" }
+/- 3.53858532522285 [arcmin] (estimated 90% radius based on SNR)
+/- 1.51954763560159 [arcmin] (formal 1-sigma fit error)
SNR: 5.00122036817166
Angular difference between Flight and Ground position is 0.988081 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 1.02399998903275 +/- 35.7770876399966
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
T50: 1.02399998903275 +/- 16
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 1.02399998903275 second)
Measured from: -2.98023223876953e-08
to: 1.02399995923042 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.003422 -0.000661 0.024055 0.023526
0.006270 0.006418 0.005887 0.006583 [error]
Peak 0.003422 -0.000661 0.024055 0.023526
0.006270 0.006418 0.005887 0.006583 [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 3.64e-10 2.22e-09 1.18e-08 2.84e-07 3.85e-08 3.00e-07 erg/cm2
Error 6.50e-10 2.39e-09 7.72e-09 3.94e-07 1.58e-08 3.98e-07 erg/cm2
Peak flux Power-law 1.10e-02 3.57e-02 9.47e-02 7.36e-01 2.59e-01 8.83e-01 ph/cm2/s
Error 2.00e-02 3.94e-02 6.99e-02 7.87e-01 1.60e-01 7.48e-01 ph/cm2/s
Fluence Cutoff-PL 1.51e-10 1.48e-10 1.99e-09 1.48e-08 6.22e-08 3.94e-08 erg/cm2
Error 2.04e-09 6.68e-09 2.98e-07 1.62e-08 2.81e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.10e-02 3.56e-02 9.49e-02 7.33e-01 2.59e-01 8.75e-01 ph/cm2/s
Error 2.00e-02 3.94e-02 7.00e-02 8.18e-01 1.59e-01 7.70e-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 -0.411 1.356 - - 1.61e-03 1.44e-03 46.190 57
CPL -4.982 0.000 124.5 51.3 2.49e-02 2.48e-02 43.530 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -0.409 1.353 - - 1.61e-03 1.44e-03 46.370 57
CPL -4.982 0.000 124.4 51.1 2.50e-02 2.48e-02 43.690 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: 0.896000 sec.
T50 in the 50-300 keV band: 0.448000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 1.024 0.000 1.024
T90 1.024 0.000 1.024
T50 1.024 0.000 1.024
Peak 1.024 -0.000 1.024
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
293.3251 -34.3196 0.0384 10.1 33.3 0.0665 5.0 TRIG_00419015
------------------------------------------
Foreground time interval of the image:
0.000 1.024 (delta_t = 1.024 [sec])
Background time interval of the image:
-54.139 -54.105 (delta_t = 0.035 [sec])
-17.240 -10.240 (delta_t = 7.000 [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 0.000 sec. to 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.411068 ( -1.81168 0.899519 )
Norm@50keV : 1.60680E-03 ( -0.00160725 0.00127694 )
------------------------------------------------------------
# Chi-Squared = 46.19 using 59 PHA bins.
# Reduced chi-squared = 0.8103 for 57 degrees of freedom
# Null hypothesis probability = 8.464231e-01
Photon flux (15-150 keV) in 1.024 sec: 0.257963 ( -0.202031 0.118508 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.85001e-08 ( -1.57861e-08 1.58038e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.98200 ( )
Epeak [keV] : 124.451 ( -30.9442 71.7006 )
Norm@50keV : 2.49210E-02 ( -0.024921 0.0245996 )
------------------------------------------------------------
# Chi-Squared = 43.53 using 59 PHA bins.
# Reduced chi-squared = 0.7772 for 56 degrees of freedom
# Null hypothesis probability = 8.879024e-01
Photon flux (15-150 keV) in 1.024 sec: 0.258123 ( -0.199098 0.118353 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.94332e-08 ( -1.59299e-08 1.64712e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.398661 ( 0.398273 0.398273 )
beta : 0.410487 ( -0.897841 1.81607 )
Epeak [keV] : 13.6464 ( -13.641 -13.641 )
Norm@50keV : 2.86184E-03 ( 1684.47 -0.00286034 )
------------------------------------------------------------
# Chi-Squared = 46.19 using 59 PHA bins.
# Reduced chi-squared = 0.8398 for 55 degrees of freedom
# Null hypothesis probability = 7.953676e-01
Photon flux (15-150 keV) in 1.024 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] : 66.7389 (-66.736 -66.736)
R^2/D10^2 : 7.77248E-04 (-0.000777282 0.00359949)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 45.53 using 59 PHA bins.
# Reduced chi-squared = 0.7987 for 57 degrees of freedom
# Null hypothesis probability = 8.628067e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.064e-10 2.340e-10
25- 50 2.343e-09 1.762e-09
50-150 3.646e-08 2.490e-08
15-150 3.911e-08 2.439e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-199.999 -199.999)
Norm : 0.747149 (-0.563056 0.563055)
------------------------------------------------------------
# Chi-Squared = 57.53 using 59 PHA bins.
# Reduced chi-squared = 1.009 for 57 degrees of freedom
# Null hypothesis probability = 4.553923e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.905e-09 1.348e-09
25- 50 3.665e-09 2.760e-09
50-150 8.037e-09 6.216e-09
15-150 1.361e-08 1.047e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 0.102252 (-0.102252 -0.102252)
R1^2/D10^2 : 6.85532E-03 (-0.00685268 -0.00685268)
kT2 [keV] : 63.0019 (-63.444 -63.444)
R2^2/D10^2 : 8.69280E-04 (-0.000853872 0.00352415)
------------------------------------------------------------
# Chi-Squared = 45.53 using 59 PHA bins.
# Reduced chi-squared = 0.8279 for 55 degrees of freedom
# Null hypothesis probability = 8.148149e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.409180 ( -1.80995 0.896546 )
Norm@50keV : 1.61217E-03 ( -0.00161259 0.00127598 )
------------------------------------------------------------
# Chi-Squared = 46.37 using 59 PHA bins.
# Reduced chi-squared = 0.8136 for 57 degrees of freedom
# Null hypothesis probability = 8.416919e-01
Photon flux (15-150 keV) in 1.024 sec: 0.258589 ( -0.201874 0.118412 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.85783e-08 ( -1.57684e-08 1.57864e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.98166 ( )
Epeak [keV] : 124.379 ( -30.8385 71.3663 )
Norm@50keV : 2.50448E-02 ( -0.0250448 0.024555 )
------------------------------------------------------------
# Chi-Squared = 43.69 using 59 PHA bins.
# Reduced chi-squared = 0.7802 for 56 degrees of freedom
# Null hypothesis probability = 8.843592e-01
Photon flux (15-150 keV) in 1.024 sec: 0.258746 ( -0.198907 0.118282 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.95035e-08 ( -1.59084e-08 1.64469e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.383453 ( 0.382711 0.382711 )
beta : 0.408793 ( -0.895981 1.81234 )
Epeak [keV] : 13.7740 ( -13.7761 -13.7761 )
Norm@50keV : 2.87119E-03 ( -0.00287137 44282.3 )
------------------------------------------------------------
# Chi-Squared = 46.37 using 59 PHA bins.
# Reduced chi-squared = 0.8431 for 55 degrees of freedom
# Null hypothesis probability = 7.897450e-01
Photon flux (15-150 keV) in 1.024 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] : 62.2931 (-62.384 -62.384)
R^2/D10^2 : 8.90737E-04 (-0.000885687 0.003499)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 45.71 using 59 PHA bins.
# Reduced chi-squared = 0.8020 for 57 degrees of freedom
# Null hypothesis probability = 8.582930e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.239e-10 2.541e-10
25- 50 2.447e-09 1.740e-09
50-150 3.620e-08 2.410e-08
15-150 3.897e-08 2.518e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-199.954 -199.954)
Norm : 0.749293 (-0.562521 0.56225)
------------------------------------------------------------
# Chi-Squared = 57.78 using 59 PHA bins.
# Reduced chi-squared = 1.014 for 57 degrees of freedom
# Null hypothesis probability = 4.463246e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.911e-09 1.461e-09
25- 50 3.675e-09 2.715e-09
50-150 8.061e-09 5.806e-09
15-150 1.365e-08 9.815e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 0.122913 (-0.122913 -0.122913)
R1^2/D10^2 : 1.67501E-02 (-0.0167435 -0.0167435)
kT2 [keV] : 62.8591 (-63.3011 -63.3011)
R2^2/D10^2 : 8.75025E-04 (-0.000859475 0.00352215)
------------------------------------------------------------
# Chi-Squared = 45.71 using 59 PHA bins.
# Reduced chi-squared = 0.8311 for 55 degrees of freedom
# Null hypothesis probability = 8.096477e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Plot creation:
Sun Apr 11 14:27:34 EDT 2010