batgrbproduct Analysis for Trigger=353567
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 v2.44
Process Start Time (local time): Sat May 30 18:49:52 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger353567/GCN5_download_cron
======================================================================
Trigger: 00353567 Segment: 000
BAT Trigger Time: 265346303.168 [s; MET]
Trigger Stop: 265346303.424 [s; MET]
UTC: 2009-05-30T03:18:18.384300 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 179.394767123952 Dec: 26.5835130140546 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.41
Image Trigger?: NO
Rate S/N Ratio: 23.3452350598575 [ if not an image trigger ]
Image S/N Ratio: 9.41
Flight Position: [ source = BAT ]
RA: 179.394767123952 Dec: 26.5835130140546 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 179.401870978969 Dec: 26.5929083396707 [deg; J2000]
{ 11h 57m 36.4s , +26d 35' 34.5" }
+/- 1.70469294461723 [arcmin] (estimated 90% radius based on SNR)
+/- 0.840806132243931 [arcmin] (formal 1-sigma fit error)
SNR: 14.1969577208166
Angular difference between Flight and Ground position is 0.680485 arcmin
Partial Coding Fraction: 0.4101562 [ including projection effects ]
Duration
T90: 48 +/- 35.7770876399966
Measured from: -15.1679999232292
to: 32.8320000767708 [s; relative to TRIGTIME]
T50: 32 +/- 16
Measured from: -15.1679999232292
to: 16.8320000767708 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 8.33199998736382
to: 9.33199998736382 [s; relative to TRIGTIME]
Total Fluence
Measured from: -15.1680000126362
to: 48.8319999873638 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.514965 0.675359 0.468996 0.120170
0.057072 0.057900 0.053441 0.049600 [error]
Peak 0.214948 0.342240 0.240983 0.027447
0.032465 0.033200 0.030405 0.027833 [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 1.67e-07 2.89e-07 3.82e-07 1.03e-06 1.12e-06 1.87e-06 erg/cm2
Error 2.61e-08 2.88e-08 5.22e-08 2.92e-07 1.25e-07 3.38e-07 erg/cm2
Peak flux Power-law 1.47e-01 1.52e-01 1.10e-01 1.28e-01 4.59e-01 5.37e-01 ph/cm2/s
Error 2.80e-02 1.84e-02 1.56e-02 3.62e-02 5.29e-02 6.24e-02 ph/cm2/s
Fluence Cutoff-PL 1.46e-07 3.17e-07 3.96e-07 3.20e-07 1.04e-06 1.18e-06 erg/cm2
Error 3.11e-08 3.71e-08 5.93e-08 3.15e-07 1.36e-07 3.41e-07 erg/cm2
Peak flux Cutoff-PL 1.24e-01 1.69e-01 1.17e-01 6.21e-02 4.66e-01 4.52e-01 ph/cm2/s
Error 3.26e-02 2.38e-02 1.84e-02 5.30e-02 5.56e-02 6.53e-02 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 1.596 0.168 - - 1.86e-03 1.94e-04 56.170 57
CPL 0.702 0.772 69.9 45.4 5.42e-03 7.20e-03 51.250 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.464 0.187 - - 3.71e-03 4.31e-04 48.830 57
CPL 0.356 0.947 70.6 43.3 1.41e-02 2.49e-02 43.430 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: 3.008000 sec.
T50 in the 50-300 keV band: 1.472000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 64.000 -15.168 48.832
T90 48.000 -15.168 32.832
T50 32.000 -15.168 16.832
Peak 1.000 8.332 9.332
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
179.4019 +26.5929 0.0136 35.3 -52.4 1.1064 14.2 TRIG_00353567
------------------------------------------
Foreground time interval of the image:
-15.168 7.533 (delta_t = 22.701 [sec])
Background time interval of the image:
-239.168 -15.168 (delta_t = 224.000 [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 -15.168 sec. to 48.832 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.59643 ( -0.166426 0.169825 )
Norm@50keV : 1.86492E-03 ( -0.000194382 0.000192693 )
------------------------------------------------------------
# Chi-Squared = 56.17 using 59 PHA bins.
# Reduced chi-squared = 0.9855 for 57 degrees of freedom
# Null hypothesis probability = 5.061711e-01
Photon flux (15-150 keV) in 64 sec: 0.239388 ( -0.0236967 0.0237209 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.11672e-06 ( -1.24643e-07 1.26175e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -15.168 sec. to 48.832 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.702294 ( -0.840443 0.702591 )
Epeak [keV] : 69.9352 ( -15.122 75.6104 )
Norm@50keV : 5.42394E-03 ( -0.00542389 0.00898519 )
------------------------------------------------------------
# Chi-Squared = 51.25 using 59 PHA bins.
# Reduced chi-squared = 0.9152 for 56 degrees of freedom
# Null hypothesis probability = 6.549114e-01
Photon flux (15-150 keV) in 64 sec: 0.230437 ( -0.024745 0.024708 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.04374e-06 ( -1.33574e-07 1.37542e-07 ) ergs/cm2
Band function
Time interval is from -15.168 sec. to 48.832 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.697793 ( -0.745822 0.821049 )
beta : -10.00000 ( 3.34448e+09 3.34448e+09 )
Epeak [keV] : 69.8129 ( -15.0417 75.7706 )
Norm@50keV : 5.45208E-03 ( -0.0054413 0.00897464 )
------------------------------------------------------------
# Chi-Squared = 51.25 using 59 PHA bins.
# Reduced chi-squared = 0.9318 for 55 degrees of freedom
# Null hypothesis probability = 6.186464e-01
Photon flux (15-150 keV) in 64 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.832 sec. to 16.832 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.46368 ( -0.186165 0.186946 )
Norm@50keV : 3.70973E-03 ( -0.000432465 0.000429773 )
------------------------------------------------------------
# Chi-Squared = 48.83 using 59 PHA bins.
# Reduced chi-squared = 0.8567 for 57 degrees of freedom
# Null hypothesis probability = 7.708590e-01
Photon flux (15-150 keV) in 16 sec: 0.458750 ( -0.0528894 0.0529667 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.66598e-07 ( -7.1771e-08 7.26206e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.832 sec. to 16.832 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.355818 ( -1.05591 0.837309 )
Epeak [keV] : 70.6475 ( -15.7678 70.8723 )
Norm@50keV : 1.41356E-02 ( -0.0141356 0.0356378 )
------------------------------------------------------------
# Chi-Squared = 43.43 using 59 PHA bins.
# Reduced chi-squared = 0.7755 for 56 degrees of freedom
# Null hypothesis probability = 8.899179e-01
Photon flux (15-150 keV) in 16 sec: 0.466003 ( -0.055564 0.055607 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.832 sec. to 16.832 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.95359 ( -53.1397 -43.1409 )
beta : -1.72407 ( -0.322522 0.299513 )
Epeak [keV] : 29.9691 ( -7.13284 5.52518 )
Norm@50keV : 125.149 ( -85.9445 378.082 )
------------------------------------------------------------
# Chi-Squared = 41.87 using 59 PHA bins.
# Reduced chi-squared = 0.7613 for 55 degrees of freedom
# Null hypothesis probability = 9.037106e-01
Photon flux (15-150 keV) in 16 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Sat May 30 19:05:25 EDT 2009