batgrbproduct Analysis for Trigger=353122
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): Tue May 26 11:52:56 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger353122/GCN5_download_cron
======================================================================
Trigger: 00353122 Segment: 000
BAT Trigger Time: 264993914.944 [s; MET]
Trigger Stop: 264993915.968 [s; MET]
UTC: 2009-05-26T01:25:10.171580 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 268.852493968961 Dec: 61.3736025483626 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.6
Image Trigger?: NO
Rate S/N Ratio: 24.7991935352745 [ if not an image trigger ]
Image S/N Ratio: 5.6
Flight Position: [ source = BAT ]
RA: 268.852493968961 Dec: 61.3736025483626 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 268.346517054177 Dec: 61.2615388392607 [deg; J2000]
{ 17h 53m 23.2s , +61d 15' 41.5" }
+/- nan [arcmin] (estimated 90% radius based on SNR)
+/- 0 [arcmin] (formal 1-sigma fit error)
SNR: -0.911259091750807
Angular difference between Flight and Ground position is 16.047269 arcmin
Partial Coding Fraction: 0.78125 [ including projection effects ]
Duration
T90: 1.02399998903275 +/-
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
T50: 1.02399998903275 +/-
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 1.02399998903275 second)
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total -0.008816 -0.008591 0.001742 0.036317
0.006736 0.007280 0.006794 0.007765 [error]
Peak -0.008816 -0.008591 0.001742 0.036317
0.006736 0.007280 0.006794 0.007765 [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 2.10e-11 2.44e-10 2.60e-09 2.03e-07 1.14e-08 0.00e+00 erg/cm2
Error 2.97e-10 8.16e-10 3.80e-09 2.63e-07 1.45e-08 0.00e+00 erg/cm2
Peak flux Power-law 6.40e-04 3.79e-03 2.01e-02 4.82e-01 6.55e-02 0.00e+00 ph/cm2/s
Error 9.71e-03 1.34e-02 2.98e-02 6.17e-01 8.97e-02 0.00e+00 ph/cm2/s
Fluence Cutoff-PL 4.55e-12 1.07e-10 2.30e-09 5.36e-07 1.43e-08 0.00e+00 erg/cm2
Error 1.19e-10 4.24e-10 3.36e-09 5.67e-07 1.52e-08 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.32e-04 1.60e-03 1.73e-02 1.21e+00 7.52e-02 0.00e+00 ph/cm2/s
Error 3.91e-03 9.43e-03 2.61e-02 1.27e+00 8.18e-02 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 1.500 0.000 - - 0.00e+00 6.52e-04 45.830 57
CPL -4.500 0.000 193.6 0.0 9.26e-04 0.00e+00 44.870 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.500 0.000 - - 0.00e+00 6.52e-04 45.830 57
CPL -4.500 0.000 193.6 0.0 9.26e-04 0.00e+00 44.870 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 1.024 0.000 1.024
T90 1.024 0.000 1.024
T50 1.024 0.000 1.024
Peak 1.024 0.000 1.024
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
268.3465 +61.2615 0.0000 20.3 -64.9 -0.0129 -0.9 TRIG_00353122
------------------------------------------
Foreground time interval of the image:
0.000 1.024 (delta_t = 1.024 [sec])
Background time interval of the image:
-60.944 -10.944 (delta_t = 50.000 [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 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50000 ( -1.5 -1.5 )
Norm@50keV : 0.0 ( 0 0.00130347 )
------------------------------------------------------------
# Chi-Squared = 45.83 using 59 PHA bins.
# Reduced chi-squared = 0.8040 for 57 degrees of freedom
# Null hypothesis probability = 8.554183e-01
Photon flux (15-150 keV) in 1.024 sec: 6.55093E-02 ( -0.0655121 0.113834 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.14324e-08 ( -1.14324e-08 1.76273e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.50000 ( -1 -1 )
Epeak [keV] : 193.559 ( -50 -50 )
Norm@50keV : 9.25635E-04 ( )
------------------------------------------------------------
# Chi-Squared = 44.87 using 59 PHA bins.
# Reduced chi-squared = 0.8012 for 56 degrees of freedom
# Null hypothesis probability = 8.569377e-01
Photon flux (15-150 keV) in 1.024 sec: 7.51858E-02 ( -0.0751858 0.0884782 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.43021e-08 ( -1.43021e-08 1.61288e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.48198 ( -5.59602 -5.59602 )
beta : -9.54726 ( 11.9833 21.9833 )
Epeak [keV] : 993.150 ( -923.114 8993.12 )
Norm@50keV : 3.88249E-05 ( -3.88249e-05 0.00608094 )
------------------------------------------------------------
# Chi-Squared = 42.81 using 59 PHA bins.
# Reduced chi-squared = 0.7783 for 55 degrees of freedom
# Null hypothesis probability = 8.843381e-01
Photon flux (15-150 keV) in 1.024 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 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50000 ( -1.5 -1.5 )
Norm@50keV : 0.0 ( 0 0.00130347 )
------------------------------------------------------------
# Chi-Squared = 45.83 using 59 PHA bins.
# Reduced chi-squared = 0.8040 for 57 degrees of freedom
# Null hypothesis probability = 8.554183e-01
Photon flux (15-150 keV) in 1.024 sec: 6.55093E-02 ( -0.0655121 0.113834 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.14324e-08 ( -1.14324e-08 1.76273e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.50000 ( -1 -1 )
Epeak [keV] : 193.559 ( -50 -50 )
Norm@50keV : 9.25635E-04 ( )
------------------------------------------------------------
# Chi-Squared = 44.87 using 59 PHA bins.
# Reduced chi-squared = 0.8012 for 56 degrees of freedom
# Null hypothesis probability = 8.569377e-01
Photon flux (15-150 keV) in 1.024 sec: 7.51858E-02 ( -0.0751858 0.0884782 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.43021e-08 ( -1.43021e-08 1.61288e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.48198 ( -5.59602 -5.59602 )
beta : -9.54726 ( 11.9833 21.9833 )
Epeak [keV] : 993.150 ( -897.642 8980 )
Norm@50keV : 3.88249E-05 ( -3.88249e-05 0.00608094 )
------------------------------------------------------------
# Chi-Squared = 42.81 using 59 PHA bins.
# Reduced chi-squared = 0.7783 for 55 degrees of freedom
# Null hypothesis probability = 8.843381e-01
Photon flux (15-150 keV) in 1.024 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Tue May 26 12:03:14 EDT 2009