batgrbproduct Analysis for Trigger=343319
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 v2.42
Process Start Time (local time): Thu Feb 19 22:37:34 EST 2009
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger343319/GCN5_download_cron
======================================================================
Trigger: 00343319 Segment: 000
BAT Trigger Time: 256755024 [s; MET]
Trigger Stop: 256755088 [s; MET]
UTC: 2009-02-19T16:50:19.487860 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 299.164379669533 Dec: 34.2115539996892 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 12.82
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 12.82
Flight Position: [ source = BAT ]
RA: 299.164379669533 Dec: 34.2115539996892 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 299.166932632994 Dec: 34.2190069505784 [deg; J2000]
{ 19h 56m 40.1s , +34d 13' 08.4" }
+/- 1.63334449460591 [arcmin] (estimated 90% radius based on SNR)
+/- 0.65610658121888 [arcmin] (formal 1-sigma fit error)
SNR: 15.0911220959352
Angular difference between Flight and Ground position is 0.464771 arcmin
Partial Coding Fraction: 0.4921875 [ including projection effects ]
Duration
T90: 645.116000026464 +/- 47.8251930600874
Measured from: -61.1679999232292
to: 583.948000103235 [s; relative to TRIGTIME]
T50: 302.636000037193 +/- 27.5902827207847
Measured from: 59.228000074625
to: 361.864000111818 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -61.3759999871254
to: -60.3759999871254 [s; relative to TRIGTIME]
Total Fluence
Measured from: -91.555999994278
to: 660.59999999404 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 5.573867 6.258364 4.170796 0.625832
0.166598 0.164976 0.145657 0.128564 [error]
Peak 0.025171 0.036390 0.013167 0.000700
0.007543 0.007820 0.006692 0.005832 [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 2.05e-06 2.98e-06 3.21e-06 6.48e-06 1.02e-05 1.47e-05 erg/cm2
Error 1.24e-07 1.05e-07 1.53e-07 6.73e-07 3.59e-07 7.82e-07 erg/cm2
Peak flux Power-law 3.09e-01 2.41e-01 1.26e-01 9.51e-02 7.19e-01 7.71e-01 ph/cm2/s
Error 1.27e-01 6.79e-02 5.61e-02 8.38e-02 2.04e-01 2.19e-01 ph/cm2/s
Fluence Cutoff-PL 1.90e-06 3.05e-06 3.27e-06 4.00e-06 9.96e-06 1.23e-05 erg/cm2
Error 1.61e-07 1.20e-07 1.64e-07 1.41e-06 4.14e-07 1.49e-06 erg/cm2
Peak flux Cutoff-PL 3.06e-01 2.46e-01 1.25e-01 7.52e-02 7.16e-01 7.47e-01 ph/cm2/s
Error 1.01e-01 9.25e-02 7.40e-02 1.00e-01 2.03e-01 2.42e-01 ph/cm2/s
Fluence Band 1.89e-06 3.04e-06 3.26e-06 4.46e-06 9.94e-06 1.27e-05 erg/cm2
Error 1.57e-07 1.19e-07 1.67e-07 1.53e-06 4.08e-07 2.13e-06 erg/cm2
Peak flux Band 2.94e-01 2.69e-01 1.15e-01 6.64e-02 7.13e-01 7.43e-01 ph/cm2/s
Error 1.45e-01 9.61e-02 4.61e-02 6.79e-02 2.05e-01 2.21e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.889 0.065 - - 1.50e-03 5.27e-05 52.738 57
CPL 1.495 0.278 65.0 28.9 2.34e-03 7.06e-04 47.449 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.936 0.536 - - 4.93e-03 1.70e-03 61.053 57
CPL 1.721 2.441 51.4 5000.0 6.60e-03 2.29e+00 61.058 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: 453.312000 sec.
T50 in the 50-300 keV band: 228.096000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 752.156 -91.556 660.600
T90 645.116 -61.168 583.948
T50 302.636 59.228 361.864
Peak 1.000 -61.376 -60.376
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
299.1669 +34.2190 0.0128 41.7 -22.5 2.1920 15.1 TRIG_00343319
------------------------------------------
Foreground time interval of the image:
-5.799 71.201 (delta_t = 77.000 [sec])
Background time interval of the image:
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
Multiple GTIs in the spectrum
tstart tstop
-91.556000 -83.450000
-73.000000 660.600000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.88915 ( -6.509697E-02 6.577241E-02) )
Norm@50keV : 1.501774E-03 ( -5.287176E-05 5.257875E-05) )
------------------------------------------------------------
Chi-Squared = 52.73828 using 59 PHA bins.
Reduced chi-squared = 0.9252330 for 57 degrees of freedom
Null hypothesis probability = 0.636
Photon flux (15-150 keV) in 741.7 sec: 0.214535 ( -0.007938 0.007973 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.02402e-05 ( -3.58538e-07 3.59131e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-91.556000 -83.450000
-73.000000 660.600000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.49523 ( -0.251188 0.304049 )
Epeak [keV] : 64.9907 ( -9.92471 47.8090 )
Norm@50keV : 2.336654E-03 ( -6.632137E-04 7.490753E-04) )
------------------------------------------------------------
Chi-Squared = 47.44895 using 59 PHA bins.
Reduced chi-squared = 0.8473027 for 56 degrees of freedom
Null hypothesis probability = 0.785
Photon flux (15-150 keV) in 741.7 sec: 0.208384 ( -0.009017 0.009063 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.96125e-06 ( -4.1639e-07 4.12534e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-91.556000 -83.450000
-73.000000 660.600000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.53077 ( -0.266562 0.283939 )
beta : -9.29104 ( -0.708962 7.32885 )
Epeak [keV] : 66.3053 ( -11.1000 45.3075 )
Norm@50keV : 2.249018E-03 ( -5.717134E-04 8.276524E-04) )
------------------------------------------------------------
Chi-Squared = 47.40115 using 59 PHA bins.
Reduced chi-squared = 0.8618392 for 55 degrees of freedom
Null hypothesis probability = 0.757
Photon flux (15-150 keV) in 741.7 sec: 0.208350 ( -0.008136 0.008395 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.94471e-06 ( -4.00444e-07 4.16168e-07 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from -61.376 sec. to -60.376 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.93596 ( -0.505724 0.566369 )
Norm@50keV : 4.934970E-03 ( -1.749092E-03 1.651112E-03) )
------------------------------------------------------------
Chi-Squared = 61.05342 using 59 PHA bins.
Reduced chi-squared = 1.071113 for 57 degrees of freedom
Null hypothesis probability = 0.332
Photon flux (15-150 keV) in 1.000 sec: 0.719282 ( -0.204059 0.204217 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.54025e-08 ( -1.48397e-08 1.55031e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -61.376 sec. to -60.376 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.72120 ( -4.44188 0.439273 )
Epeak [keV] : 51.4486 ( -51.4386 9948.55 )
Norm@50keV : 6.602714E-03 ( -6.602714E-03 4.57778 )
------------------------------------------------------------
Chi-Squared = 61.05812 using 59 PHA bins.
Reduced chi-squared = 1.090324 for 56 degrees of freedom
Null hypothesis probability = 0.299
Photon flux (15-150 keV) in 1.000 sec: 0.716252 ( -0.202724 0.203393 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.49122e-08 ( -1.13455e-08 1.59452e-08 ) ergs/cm2
Band function
Time interval is from -61.376 sec. to -60.376 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.436770 ( -9.56323 5.43677 )
beta : -2.19469 ( -7.80531 0.701545 )
Epeak [keV] : 31.7972 ( -31.6972 291.665 )
Norm@50keV : 5.197335E-02 ( -188.960 214.539 )
------------------------------------------------------------
Chi-Squared = 60.43226 using 59 PHA bins.
Reduced chi-squared = 1.098768 for 55 degrees of freedom
Null hypothesis probability = 0.286
Photon flux (15-150 keV) in 1.000 sec: 0.713385 ( -0.205505 0.204145 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.27529e-08 ( -1.35798e-08 1.48601e-08 ) ergs/cm2
Plot creation:
Thu Feb 19 23:16:49 EST 2009