batgrbproduct Analysis for Trigger=330353
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 v2.41
Process Start Time (local time): Fri Oct 3 19:02:29 EDT 2008
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger330353/GCN5_download_cron
======================================================================
Trigger: 00330353 Segment: 000
BAT Trigger Time: 244718892.024 [s; MET]
Trigger Stop: 244718892.088 [s; MET]
UTC: 2008-10-03T09:28:08.878460 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 237.711315745411 Dec: -54.3193323736566 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 12.49
Image Trigger?: NO
Rate S/N Ratio: 24.2487113059643 [ if not an image trigger ]
Image S/N Ratio: 12.49
Flight Position: [ source = BAT ]
RA: 237.711315745411 Dec: -54.3193323736566 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 237.856536437009 Dec: -54.4460064770027 [deg; J2000]
{ 15h 51m 25.6s , -54d 26' 45.6" }
+/- 8.35798274186355 [arcmin] (estimated 90% radius based on SNR)
+/- 7.73295957271479 [arcmin] (formal 1-sigma fit error)
SNR: 1.46497618796714
Angular difference between Flight and Ground position is 9.138678 arcmin
Partial Coding Fraction: 0.953125 [ including projection effects ]
Duration
T90: 615.06400001049 +/- 264.583602352755
Measured from: -2.46399989724159
to: 612.600000113249 [s; relative to TRIGTIME]
T50: 615.06400001049 +/- 368.347903742417
Measured from: -2.46399989724159
to: 612.600000113249 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 523.636000007391
to: 524.636000007391 [s; relative to TRIGTIME]
Total Fluence
Measured from: -2.46399998664856
to: 612.600000023842 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.473923 0.174253 0.462314 0.112436
0.132465 0.124164 0.115849 0.120782 [error]
Peak 0.086870 0.154902 0.054773 -0.006048
0.006336 0.006617 0.005218 0.004788 [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 1.10e-07 1.85e-07 2.35e-07 5.99e-07 6.96e-07 1.13e-06 erg/cm2
Error 5.95e-08 5.71e-08 1.27e-07 8.62e-07 2.84e-07 8.93e-07 erg/cm2
Peak flux Power-law 1.04e+00 8.42e-01 4.59e-01 3.66e-01 2.51e+00 2.71e+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
Fluence Cutoff-PL 1.10e-07 1.85e-07 2.35e-07 5.94e-07 6.95e-07 1.12e-06 erg/cm2
Error 5.95e-08 5.71e-08 1.27e-07 8.55e-07 2.84e-07 8.87e-07 erg/cm2
Peak flux Cutoff-PL 6.60e-01 1.17e+00 4.37e-01 1.61e-02 2.29e+00 2.29e+00 ph/cm2/s
Error 1.12e-01 8.32e-02 5.85e-02 1.14e-02 1.62e-01 1.62e-01 ph/cm2/s
Fluence Band 1.18e-07 1.79e-07 2.33e-07 5.81e-07 6.91e-07 9.92e-07 erg/cm2
Error 3.79e-08 5.67e-08 6.66e-08 5.90e-07 2.17e-07 7.88e-07 erg/cm2
Peak flux Band 6.49e-01 1.18e+00 4.31e-01 1.41e-02 2.27e+00 2.27e+00 ph/cm2/s
Error 1.06e-01 7.11e-02 4.81e-02 1.03e-02 1.02e-01 1.37e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.652 0.752 - - 1.22e-04 4.64e-05 69.512 57
CPL 1.652 0.755 9994.9 5000.0 1.22e-04 4.67e-05 69.515 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.875 0.000 - - 1.77e-02 0.00e+00 154.210 57
CPL -1.913 0.919 43.9 2.3 2.31e+00 2.59e+00 52.638 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: 310.080000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 615.064 -2.464 612.600
T90 615.064 -2.464 612.600
T50 615.064 -2.464 612.600
Peak 1.000 523.636 524.636
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
237.8565 -54.4460 0.1300 19.3 -146.2 0.0873 1.5 TRIG_00330353
------------------------------------------
Foreground time interval of the image:
-2.464 12.777 (delta_t = 15.241 [sec])
Background time interval of the image:
-14.723 -2.464 (delta_t = 12.259 [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
Multiple GTIs in the spectrum
tstart tstop
-2.464000 147.086000
147.976000 386.466000
387.976000 612.600000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.65180 ( -0.709335 0.793805 )
Norm@50keV : 1.220780E-04 ( -4.973058E-05 4.304163E-05) )
------------------------------------------------------------
Chi-Squared = 69.51168 using 59 PHA bins.
Reduced chi-squared = 1.219503 for 57 degrees of freedom
Null hypothesis probability = 0.124
Photon flux (15-150 keV) in 612.7 sec: 1.595603E-02 ( -0.00491209 0.00491504 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.95819e-07 ( -2.73915e-07 2.94856e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-2.464000 147.086000
147.976000 386.466000
387.976000 612.600000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.65181 ( -0.714327 0.796525 )
Epeak [keV] : 9994.89 ( -9994.88 5.11328 )
Norm@50keV : 1.223063E-04 ( -5.014285E-05 4.334345E-05) )
------------------------------------------------------------
Chi-Squared = 69.51530 using 59 PHA bins.
Reduced chi-squared = 1.241345 for 56 degrees of freedom
Null hypothesis probability = 0.106
Photon flux (15-150 keV) in 612.7 sec: 1.594738E-02 ( -0.00491032 0.00491343 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.95488e-07 ( -2.73847e-07 2.95033e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-2.464000 147.086000
147.976000 386.466000
387.976000 612.600000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.26184 ( -8.73816 6.26184 )
beta : -1.64878 ( -1.31708 0.706422 )
Epeak [keV] : 22.0408 ( -21.9408 9977.96 )
Norm@50keV : 3.172818E-04 ( -3.172818E-04 17.8633 )
------------------------------------------------------------
Chi-Squared = 69.51175 using 59 PHA bins.
Reduced chi-squared = 1.263850 for 55 degrees of freedom
Null hypothesis probability = 9.010E-02
Photon flux (15-150 keV) in 612.7 sec: 1.589168E-02 ( -0.00488435 0.00487876 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.90721e-07 ( -2.20719e-07 2.12693e-07 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 523.636 sec. to 524.636 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.87514 ( )
Norm@50keV : 1.765703E-02 ( )
------------------------------------------------------------
Chi-Squared = 154.2105 using 59 PHA bins.
Reduced chi-squared = 2.705447 for 57 degrees of freedom
Null hypothesis probability = 6.868E-11
Photon flux (15-150 keV) in 1.000 sec: 2.50760 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.62283e-07 ( 0 0 ) ergs/cm2
Cutoff power-law model
Time interval is from 523.636 sec. to 524.636 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.91258 ( -0.993128 0.844036 )
Epeak [keV] : 43.8516 ( -2.17403 2.42630 )
Norm@50keV : 2.31425 ( -2.31425 2.87137 )
------------------------------------------------------------
Chi-Squared = 52.63824 using 59 PHA bins.
Reduced chi-squared = 0.9399686 for 56 degrees of freedom
Null hypothesis probability = 0.603
Photon flux (15-150 keV) in 1.000 sec: 2.28715 ( -0.16115 0.16194 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.35923e-07 ( -9.931e-09 1.0355e-08 ) ergs/cm2
Band function
Time interval is from 523.636 sec. to 524.636 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.18091 ( -1.73920 0.497989 )
beta : -9.37162 ( -1.850128E-04 3.328323E-04) )
Epeak [keV] : 44.8675 ( -2.05939 3.42777 )
Norm@50keV : 0.896517 ( -1.83827 5.58824 )
------------------------------------------------------------
Chi-Squared = 54.73444 using 59 PHA bins.
Reduced chi-squared = 0.9951717 for 55 degrees of freedom
Null hypothesis probability = 0.485
Photon flux (15-150 keV) in 1.000 sec: 2.26725 ( -0.06987 0.13474 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.35457e-07 ( -9.415e-09 8.147e-09 ) ergs/cm2
Plot creation:
Fri Oct 3 19:31:16 EDT 2008