batgrbproduct Analysis for Trigger=355617
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): Wed Jun 24 09:56:59 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger355617/GCN5_download_cron
======================================================================
Trigger: 00355617 Segment: 000
BAT Trigger Time: 267527716.632 [s; MET]
Trigger Stop: 267527716.696 [s; MET]
UTC: 2009-06-24T09:15:11.778340 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 179.26346974201 Dec: 66.6232903027154 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.11
Image Trigger?: NO
Rate S/N Ratio: 8 [ if not an image trigger ]
Image S/N Ratio: 6.11
Flight Position: [ source = BAT ]
RA: 179.26346974201 Dec: 66.6232903027154 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 179.259312412582 Dec: 66.6123299814855 [deg; J2000]
{ 11h 57m 02.2s , +66d 36' 44.4" }
+/- 3.50066060996977 [arcmin] (estimated 90% radius based on SNR)
+/- 2.30733805020404 [arcmin] (formal 1-sigma fit error)
SNR: 5.07880134509636
Angular difference between Flight and Ground position is 0.665028 arcmin
Partial Coding Fraction: 0.84375 [ including projection effects ]
Duration
T90: 0.0640000104904175 +/-
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
T50: 0.0640000104904175 +/-
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.0640000104904175 second)
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.001468 0.001531 0.005726 0.005619
0.001426 0.001508 0.001473 0.001577 [error]
Peak 0.001468 0.001531 0.005726 0.005619
0.001426 0.001508 0.001473 0.001577 [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 3.78e-10 1.13e-09 2.78e-09 1.90e-08 7.53e-09 2.33e-08 erg/cm2
Error 3.79e-10 6.83e-10 1.05e-09 1.61e-08 2.82e-09 1.60e-08 erg/cm2
Peak flux Power-law 1.87e-01 3.03e-01 3.72e-01 8.97e-01 1.12e+00 1.76e+00 ph/cm2/s
Error 1.78e-01 1.88e-01 1.42e-01 6.69e-01 4.96e-01 6.89e-01 ph/cm2/s
Fluence Cutoff-PL 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 Cutoff-PL 5.93e-02 2.77e-01 5.18e-01 1.11e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 1.74e-01 2.06e-01 2.21e-01 8.02e-01 0.00e+00 0.00e+00 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 0.707 0.714 - - 9.67e-03 7.06e-03 65.690 57
CPL -1.895 0.000 100.8 370.1 8.42e-02 4.68e-01 64.660 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.707 0.714 - - 9.67e-03 7.06e-03 65.690 57
CPL -1.895 0.000 100.8 4886.5 8.42e-02 4.68e-01 64.660 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 0.064 0.000 0.064
T90 0.064 0.000 0.064
T50 0.064 0.000 0.064
Peak 0.064 0.000 0.064
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
179.2593 +66.6123 0.0380 30.1 -165.0 0.0153 5.1 TRIG_00355617
------------------------------------------
Foreground time interval of the image:
0.000 0.064 (delta_t = 0.064 [sec])
Background time interval of the image:
-60.632 -4.632 (delta_t = 56.000 [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 0.000 sec. to 0.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.706643 ( -0.830289 0.597394 )
Norm@50keV : 9.66715E-03 ( -0.0096671 0.00445531 )
------------------------------------------------------------
# Chi-Squared = 65.69 using 59 PHA bins.
# Reduced chi-squared = 1.153 for 57 degrees of freedom
# Null hypothesis probability = 2.010526e-01
Photon flux (15-150 keV) in 0.064 sec: 1.11688 ( -0.486067 0.506597 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.52954e-09 ( -2.8209e-09 2.82091e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.89502 ( 2.0492 2.0492 )
Epeak [keV] : 100.789 ( -31.4372 708.725 )
Norm@50keV : 8.41631E-02 ( -0.107489 0.827624 )
------------------------------------------------------------
# Chi-Squared = 64.66 using 59 PHA bins.
# Reduced chi-squared = 1.155 for 56 degrees of freedom
# Null hypothesis probability = 1.999458e-01
Photon flux (15-150 keV) in 0.064 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -954647 -954647 )
beta : -2.30956 ( 2.30956 2.04591 )
Epeak [keV] : 80.7894 ( -80.7894 26.9466 )
Norm@50keV : 1.00571 ( -1.00624 892638 )
------------------------------------------------------------
# Chi-Squared = 63.92 using 59 PHA bins.
# Reduced chi-squared = 1.162 for 55 degrees of freedom
# Null hypothesis probability = 1.917180e-01
Photon flux (15-150 keV) in 0.064 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 0.000 sec. to 0.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.706643 ( -0.830289 0.597394 )
Norm@50keV : 9.66715E-03 ( -0.0096671 0.00445531 )
------------------------------------------------------------
# Chi-Squared = 65.69 using 59 PHA bins.
# Reduced chi-squared = 1.153 for 57 degrees of freedom
# Null hypothesis probability = 2.010526e-01
Photon flux (15-150 keV) in 0.064 sec: 1.11688 ( -0.486067 0.506597 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.52954e-09 ( -2.8209e-09 2.82091e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.89502 ( 2.0492 2.0492 )
Epeak [keV] : 100.789 ( -31.4372 9741.58 )
Norm@50keV : 8.41631E-02 ( -0.107489 0.827624 )
------------------------------------------------------------
# Chi-Squared = 64.66 using 59 PHA bins.
# Reduced chi-squared = 1.155 for 56 degrees of freedom
# Null hypothesis probability = 1.999458e-01
Photon flux (15-150 keV) in 0.064 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -954647 -954647 )
beta : -2.30956 ( 2.30956 2.04591 )
Epeak [keV] : 80.7894 ( -80.7894 26.9466 )
Norm@50keV : 1.00571 ( -1.00624 892638 )
------------------------------------------------------------
# Chi-Squared = 63.92 using 59 PHA bins.
# Reduced chi-squared = 1.162 for 55 degrees of freedom
# Null hypothesis probability = 1.917180e-01
Photon flux (15-150 keV) in 0.064 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Wed Jun 24 10:08:33 EDT 2009