batgrbproduct Analysis for Trigger=424733
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 v2.46
Process Start Time (local time): Wed Jun 16 02:05:38 EDT 2010
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger424733/GCN5_download_cron
======================================================================
Trigger: 00424733 Segment: 000
BAT Trigger Time: 298259949.888 [s; MET]
Trigger Stop: 298259950.4 [s; MET]
UTC: 2010-06-15T01:59:03.994640 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 177.207328867743 Dec: -19.4961246717107 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.47
Image Trigger?: NO
Rate S/N Ratio: 24.8797106092495 [ if not an image trigger ]
Image S/N Ratio: 10.47
Flight Position: [ source = BAT ]
RA: 177.207328867743 Dec: -19.4961246717107 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 177.208406947316 Dec: -19.4834816779288 [deg; J2000]
{ 11h 48m 50.0s , -19d 29' 00.5" }
+/- 0.586531309634022 [arcmin] (estimated 90% radius based on SNR)
+/- 0.259380623040101 [arcmin] (formal 1-sigma fit error)
SNR: 65.1824906776802
Angular difference between Flight and Ground position is 0.761027 arcmin
Partial Coding Fraction: 0.9921875 [ including projection effects ]
Duration
T90: 38.8079999089241 +/- 0.804885126032719
Measured from: 1.29600012302399
to: 40.1040000319481 [s; relative to TRIGTIME]
T50: 23.4599999785423 +/- 1.35756251197324
Measured from: 7.22800010442734
to: 30.6880000829697 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 10.255999982357
to: 11.255999982357 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.0440000295639038
to: 47.4079999923706 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.161108 3.421188 2.059680 0.398458
0.044464 0.045771 0.039514 0.032420 [error]
Peak 0.192783 0.265745 0.181659 0.038326
0.008134 0.009010 0.007812 0.005529 [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 9.73e-07 1.43e-06 1.57e-06 3.22e-06 4.95e-06 7.18e-06 erg/cm2
Error 4.16e-08 3.38e-08 4.44e-08 2.11e-07 1.05e-07 2.32e-07 erg/cm2
Peak flux Power-law 1.87e+00 1.81e+00 1.23e+00 1.30e+00 5.43e+00 6.20e+00 ph/cm2/s
Error 1.04e-01 6.66e-02 6.33e-02 1.30e-01 1.97e-01 2.38e-01 ph/cm2/s
Fluence Cutoff-PL 9.22e-07 1.44e-06 1.58e-06 2.40e-06 4.86e-06 6.35e-06 erg/cm2
Error 5.57e-08 3.59e-08 4.72e-08 5.40e-07 1.27e-07 5.64e-07 erg/cm2
Peak flux Cutoff-PL 1.79e+00 1.91e+00 1.25e+00 7.62e-01 5.37e+00 5.71e+00 ph/cm2/s
Error 1.15e-01 8.81e-02 6.84e-02 2.34e-01 2.00e-01 2.93e-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 1.869 0.044 - - 1.13e-02 2.41e-04 50.690 57
CPL 1.647 0.176 84.0 57.4 1.44e-02 2.67e-03 45.840 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.564 0.061 - - 4.27e-02 1.71e-03 58.420 57
CPL 1.157 0.245 94.8 43.5 7.16e-02 2.23e-02 49.460 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: 39.296000 sec.
T50 in the 50-300 keV band: 26.880000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 47.452 -0.044 47.408
T90 38.808 1.296 40.104
T50 23.460 7.228 30.688
Peak 1.000 10.256 11.256
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
177.2084 -19.4835 0.0029 18.0 -25.9 2.9295 65.2 TRIG_00424733
------------------------------------------
Foreground time interval of the image:
-0.044 10.113 (delta_t = 10.157 [sec])
Background time interval of the image:
-239.888 -0.044 (delta_t = 239.844 [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 -0.044 sec. to 47.408 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.86859 ( -0.043479 0.0436427 )
Norm@50keV : 1.13490E-02 ( -0.000241171 0.000240998 )
------------------------------------------------------------
# Chi-Squared = 50.69 using 59 PHA bins.
# Reduced chi-squared = 0.8893 for 57 degrees of freedom
# Null hypothesis probability = 7.092198e-01
Photon flux (15-150 keV) in 47.45 sec: 1.60741 ( -0.0404371 0.040679 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.95065e-06 ( -1.05344e-07 1.05407e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.044 sec. to 47.408 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.64737 ( -0.178974 0.172174 )
Epeak [keV] : 83.9753 ( -16.5773 98.3105 )
Norm@50keV : 1.43962E-02 ( -0.00237238 0.00297294 )
------------------------------------------------------------
# Chi-Squared = 45.84 using 59 PHA bins.
# Reduced chi-squared = 0.8186 for 56 degrees of freedom
# Null hypothesis probability = 8.316347e-01
Photon flux (15-150 keV) in 47.45 sec: 1.57072 ( -0.04839 0.04864 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.85698e-06 ( -1.2811e-07 1.25505e-07 ) ergs/cm2
Band function
Time interval is from -0.044 sec. to 47.408 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.63774 ( -0.180977 0.123751 )
beta : -9.37167 ( 10 20 )
Epeak [keV] : 83.1597 ( -13.9477 60.203 )
Norm@50keV : 1.45222E-02 ( -0.00249332 0.00236005 )
------------------------------------------------------------
# Chi-Squared = 45.85 using 59 PHA bins.
# Reduced chi-squared = 0.8337 for 55 degrees of freedom
# Null hypothesis probability = 8.054483e-01
Photon flux (15-150 keV) in 47.45 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] : 13.9995 ( )
R^2/D10^2 : 0.195701 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 512.88 using 59 PHA bins.
# Reduced chi-squared = 8.9979 for 57 degrees of freedom
# Null hypothesis probability = 1.468386e-74
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.844e-07 1.628e-08
25- 50 1.430e-06 4.223e-08
50-150 1.845e-06 7.331e-08
15-150 3.659e-06 8.351e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 105.202 (-3.53486 15.1234)
Norm : 6.71866 (-0.238522 0.25139)
------------------------------------------------------------
# Chi-Squared = 55.97 using 59 PHA bins.
# Reduced chi-squared = 0.9820 for 57 degrees of freedom
# Null hypothesis probability = 5.137040e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.331e-07 2.918e-08
25- 50 1.455e-06 3.938e-08
50-150 2.425e-06 8.161e-08
15-150 4.713e-06 1.037e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.24853 (-0.45809 0.48775)
R1^2/D10^2 : 2.81792 (-0.72017 1.02922)
kT2 [keV] : 22.2828 (-1.35539 1.59876)
R2^2/D10^2 : 2.76334E-02 (-0.00662889 0.00789216)
------------------------------------------------------------
# Chi-Squared = 45.71 using 59 PHA bins.
# Reduced chi-squared = 0.8311 for 55 degrees of freedom
# Null hypothesis probability = 8.096685e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.534e-07 6.382e-08
25- 50 1.436e-06 6.429e-08
50-150 2.454e-06 1.260e-07
15-150 4.744e-06 1.934e-07
Peak spectrum fit
Power-law model
Time interval is from 10.256 sec. to 11.256 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.56380 ( -0.060853 0.0614604 )
Norm@50keV : 4.27062E-02 ( -0.00171567 0.00170672 )
------------------------------------------------------------
# Chi-Squared = 58.42 using 59 PHA bins.
# Reduced chi-squared = 1.025 for 57 degrees of freedom
# Null hypothesis probability = 4.231400e-01
Photon flux (15-150 keV) in 1 sec: 5.42819 ( -0.197354 0.197357 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.01266e-07 ( -1.77062e-08 1.77957e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 10.256 sec. to 11.256 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.15677 ( -0.251654 0.237397 )
Epeak [keV] : 94.7961 ( -20.5809 66.3373 )
Norm@50keV : 7.16223E-02 ( -0.0182389 0.0264197 )
------------------------------------------------------------
# Chi-Squared = 49.46 using 59 PHA bins.
# Reduced chi-squared = 0.8832 for 56 degrees of freedom
# Null hypothesis probability = 7.191208e-01
Photon flux (15-150 keV) in 1 sec: 5.37373 ( -0.19989 0.19987 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.87071e-07 ( -1.96e-08 1.9636e-08 ) ergs/cm2
Band function
Time interval is from 10.256 sec. to 11.256 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.15860E-02 ( -1.19557 2.76515 )
beta : -1.73908 ( -0.136664 0.105493 )
Epeak [keV] : 40.6351 ( -9.38806 23.3858 )
Norm@50keV : 0.409564 ( -0.873818 76.3142 )
------------------------------------------------------------
# Chi-Squared = 44.56 using 59 PHA bins.
# Reduced chi-squared = 0.8102 for 55 degrees of freedom
# Null hypothesis probability = 8.416917e-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] : 12.5965 ( )
R^2/D10^2 : 1.15203 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 217.16 using 59 PHA bins.
# Reduced chi-squared = 3.8098 for 57 degrees of freedom
# Null hypothesis probability = 1.562622e-20
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.876e-08 2.415e-09
25- 50 1.290e-07 5.000e-09
50-150 1.269e-07 1.075e-08
15-150 2.947e-07 1.305e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 179.246 (43.988 -102.958)
Norm : 22.3549 (-0.846615 0.870945)
------------------------------------------------------------
# Chi-Squared = 49.72 using 59 PHA bins.
# Reduced chi-squared = 0.8722 for 57 degrees of freedom
# Null hypothesis probability = 7.422315e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.640e-08 3.075e-09
25- 50 1.071e-07 4.900e-09
50-150 2.264e-07 3.790e-08
15-150 3.899e-07 4.250e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.01894 (-0.732353 0.768142)
R1^2/D10^2 : 6.06683 (-1.66305 2.52354)
kT2 [keV] : 25.5626 (-3.22933 4.49768)
R2^2/D10^2 : 6.87004E-02 (-0.0303006 0.0451634)
------------------------------------------------------------
# Chi-Squared = 44.41 using 59 PHA bins.
# Reduced chi-squared = 0.8075 for 55 degrees of freedom
# Null hypothesis probability = 8.456578e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.586e-08 4.770e-09
25- 50 1.105e-07 9.095e-09
50-150 2.246e-07 3.490e-08
15-150 3.909e-07 4.315e-08
Plot creation:
Wed Jun 16 02:35:42 EDT 2010