batgrbproduct Analysis for Trigger=358362
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 Jul 26 13:59:04 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger358362/GCN5_download_cron
======================================================================
Trigger: 00358362 Segment: 000
BAT Trigger Time: 270281120 [s; MET]
Trigger Stop: 270281184 [s; MET]
UTC: 2009-07-26T06:05:15.057100 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 302.198825537513 Dec: 32.5852843836664 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 17.43
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 17.43
Flight Position: [ source = BAT ]
RA: 302.198825537513 Dec: 32.5852843836664 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 302.140327094747 Dec: 32.5588793790509 [deg; J2000]
{ 20h 08m 33.7s , +32d 33' 32.0" }
+/- 3.55801631737419 [arcmin] (estimated 90% radius based on SNR)
+/- 1.49616569961988 [arcmin] (formal 1-sigma fit error)
SNR: 4.96224807785777
Angular difference between Flight and Ground position is 3.355426 arcmin
Partial Coding Fraction: 0.7734375 [ including projection effects ]
Duration
T90: 0.179999947547913 +/- 0.0282843074937595
Measured from: 182.780000090599
to: 182.960000038147 [s; relative to TRIGTIME]
T50: 0.13999992609024 +/- 0.0856037446085389
Measured from: 182.80000013113
to: 182.94000005722 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 182.374000012875
to: 183.374000012875 [s; relative to TRIGTIME]
Total Fluence
Measured from: 182.776000022888
to: 182.967999994755 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.007150 0.009005 0.011688 0.004517
0.002942 0.002722 0.002702 0.002149 [error]
Peak 0.007271 0.009534 0.011552 0.004149
0.002959 0.002755 0.002731 0.002166 [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 2.85e-09 2.19e-09 1.12e-09 8.10e-10 6.53e-09 7.04e-09 erg/cm2
Error 1.29e-09 1.02e-09 7.77e-10 9.87e-10 2.88e-09 3.31e-09 erg/cm2
Peak flux Power-law 5.11e-01 2.14e-01 5.29e-02 1.60e-02 7.88e-01 7.94e-01 ph/cm2/s
Error 2.23e-01 9.64e-02 3.63e-02 1.88e-02 3.25e-01 3.27e-01 ph/cm2/s
Fluence Cutoff-PL 2.12e-09 4.38e-09 2.60e-09 2.58e-10 9.36e-09 0.00e+00 erg/cm2
Error 1.49e-09 1.75e-09 2.23e-09 3.64e-09 0.00e+00 0.00e+00 erg/cm2
Peak flux Cutoff-PL 3.89e-01 4.01e-01 1.16e-01 6.04e-03 9.12e-01 9.12e-01 ph/cm2/s
Error 3.26e-01 1.58e-01 9.97e-02 1.09e-02 3.33e-01 3.33e-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 3.16e-01 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 2.978 0.649 - - 2.86e-03 2.26e-03 85.150 57
CPL -0.495 3.094 38.5 27.2 2.02e-01 5.94e+00 78.700 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.016 0.647 - - 2.84e-03 2.24e-03 83.590 57
CPL -0.226 2.737 35.5 0.0 1.67e-01 0.00e+00 77.530 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 0.192 182.776 182.968
T90 0.180 182.780 182.960
T50 0.140 182.800 182.940
Peak 1.000 182.374 183.374
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
302.1403 +32.5589 0.0388 26.1 -41.3 0.0249 5.0 TRIG_00358362
------------------------------------------
Foreground time interval of the image:
182.776 182.968 (delta_t = 0.192 [sec])
Background time interval of the image:
31.000 182.776 (delta_t = 151.776 [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 182.776 sec. to 182.968 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.97792 ( -0.495176 0.802713 )
Norm@50keV : 2.86159E-03 ( -0.00285784 0.0016618 )
------------------------------------------------------------
# Chi-Squared = 85.15 using 59 PHA bins.
# Reduced chi-squared = 1.494 for 57 degrees of freedom
# Null hypothesis probability = 9.223039e-03
Photon flux (15-150 keV) in 0.192 sec: 0.773721 ( -0.328924 0.328869 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.53188e-09 ( -2.79961e-09 2.95801e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 182.776 sec. to 182.968 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.494977 ( -3.87438 2.31366 )
Epeak [keV] : 38.4629 ( -38.534 15.8939 )
Norm@50keV : 0.201807 ( -0.201643 11.6757 )
------------------------------------------------------------
# Chi-Squared = 78.70 using 59 PHA bins.
# Reduced chi-squared = 1.405 for 56 degrees of freedom
# Null hypothesis probability = 2.443414e-02
Photon flux (15-150 keV) in 0.192 sec: 0.895637 ( -0.340043 0.339133 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 182.776 sec. to 182.968 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -5.09744E-02 ( -1.92799 4.48435 )
beta : -10.00000 ( 828945 828955 )
Epeak [keV] : 35.0935 ( -29.4893 20.1528 )
Norm@50keV : 0.113905 ( -0.113905 11.3948 )
------------------------------------------------------------
# Chi-Squared = 78.83 using 59 PHA bins.
# Reduced chi-squared = 1.433 for 55 degrees of freedom
# Null hypothesis probability = 1.924743e-02
Photon flux (15-150 keV) in 0.192 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] : 11.2334 (-4.1547 2.90784)
R^2/D10^2 : 0.309960 (-0.309925 1.41642)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 78.95 using 59 PHA bins.
# Reduced chi-squared = 1.385 for 57 degrees of freedom
# Null hypothesis probability = 2.872002e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.575e-09 1.012e-09
25- 50 4.575e-09 2.892e-09
50-150 3.313e-09 2.537e-09
15-150 9.463e-09 5.952e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 32.9621 (-13.4552 17.8529)
Norm : 6.98069 (-2.9341 5.8104)
------------------------------------------------------------
# Chi-Squared = 80.41 using 59 PHA bins.
# Reduced chi-squared = 1.411 for 57 degrees of freedom
# Null hypothesis probability = 2.226249e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.854e-09 1.634e-09
25- 50 3.428e-09 1.974e-09
50-150 2.117e-09 1.640e-09
15-150 8.398e-09 4.456e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.84713 (-3.77739 16.9842)
R1^2/D10^2 : 9.22552 (-9.37087 -9.37087)
kT2 [keV] : 12.3628 (-4.04322 -12.3506)
R2^2/D10^2 : 0.181122 (-0.184518 0.720992)
------------------------------------------------------------
# Chi-Squared = 77.64 using 59 PHA bins.
# Reduced chi-squared = 1.412 for 55 degrees of freedom
# Null hypothesis probability = 2.388309e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.456e-09 1.306e-09
25- 50 4.098e-09 2.565e-09
50-150 3.442e-09 2.583e-09
15-150 9.996e-09 5.885e-09
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 182.776 sec. to 182.972 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.01557 ( -0.492946 0.801066 )
Norm@50keV : 2.83557E-03 ( -0.0028298 0.00164508 )
------------------------------------------------------------
# Chi-Squared = 83.59 using 59 PHA bins.
# Reduced chi-squared = 1.466 for 57 degrees of freedom
# Null hypothesis probability = 1.243052e-02
Photon flux (15-150 keV) in 0.196 sec: 0.787539 ( -0.324599 0.3246 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.71953e-09 ( -2.87083e-09 2.97489e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 182.776 sec. to 182.972 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.225639 ( -3.27721 2.19639 )
Epeak [keV] : 35.4511 ( )
Norm@50keV : 0.166644 ( )
------------------------------------------------------------
# Chi-Squared = 77.53 using 59 PHA bins.
# Reduced chi-squared = 1.384 for 56 degrees of freedom
# Null hypothesis probability = 2.998426e-02
Photon flux (15-150 keV) in 0.196 sec: 0.911797 ( -0.332958 0.333303 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.3003e-09 ( -3.56687e-09 3.66242e-09 ) ergs/cm2
Band function
Time interval is from 182.776 sec. to 182.972 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -7.54099E-02 ( -2.00923 1.26766 )
beta : -10.00000 ( 1.34811e+07 1.34811e+07 )
Epeak [keV] : 32.5744 ( -29.8359 19.0572 )
Norm@50keV : 0.126544 ( -0.126773 12.7257 )
------------------------------------------------------------
# Chi-Squared = 77.60 using 59 PHA bins.
# Reduced chi-squared = 1.411 for 55 degrees of freedom
# Null hypothesis probability = 2.405755e-02
Photon flux (15-150 keV) in 0.196 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] : 10.5435 (-4.40014 3.23979)
R^2/D10^2 : 0.387574 (-0.262236 2.69125)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 78.15 using 59 PHA bins.
# Reduced chi-squared = 1.371 for 57 degrees of freedom
# Null hypothesis probability = 3.293558e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.747e-09 1.074e-09
25- 50 4.673e-09 2.826e-09
50-150 2.837e-09 2.240e-09
15-150 9.258e-09 5.856e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 32.0185 (-12.7216 17.6337)
Norm : 7.19607 (-3.04228 6.46158)
------------------------------------------------------------
# Chi-Squared = 78.89 using 59 PHA bins.
# Reduced chi-squared = 1.384 for 57 degrees of freedom
# Null hypothesis probability = 2.905388e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.963e-09 1.704e-09
25- 50 3.507e-09 2.087e-09
50-150 2.088e-09 1.604e-09
15-150 8.558e-09 5.028e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.96196 (-4.05212 15.7758)
R1^2/D10^2 : 8.59226 (-8.50718 -8.50718)
kT2 [keV] : 12.0687 (-4.59366 -12.1915)
R2^2/D10^2 : 0.188278 (-0.185852 1.16091)
------------------------------------------------------------
# Chi-Squared = 76.64 using 59 PHA bins.
# Reduced chi-squared = 1.394 for 55 degrees of freedom
# Null hypothesis probability = 2.847186e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.600e-09 1.414e-09
25- 50 4.117e-09 2.735e-09
50-150 3.174e-09 2.749e-09
15-150 9.890e-09 5.919e-09
Plot creation:
Sun Jul 26 14:07:15 EDT 2009