batgrbproduct Analysis for Trigger=355042
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): Thu Jun 18 03:57:24 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger355042/GCN5_download_cron
======================================================================
Trigger: 00355042 Segment: 000
BAT Trigger Time: 266926964.288 [s; MET]
Trigger Stop: 266926991.168 [s; MET]
UTC: 2009-06-17T10:22:39.453720 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 234.740579502471 Dec: 19.2883686670276 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.81
Image Trigger?: NO
Rate S/N Ratio: 12.4498995979887 [ if not an image trigger ]
Image S/N Ratio: 5.81
Flight Position: [ source = BAT ]
RA: 234.740579502471 Dec: 19.2883686670276 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 234.745059693429 Dec: 19.2924637115165 [deg; J2000]
{ 15h 38m 58.8s , +19d 17' 32.9" }
+/- 4.37825871161533 [arcmin] (estimated 90% radius based on SNR)
+/- 2.72518328998726 [arcmin] (formal 1-sigma fit error)
SNR: 3.68955079345163
Angular difference between Flight and Ground position is 0.353190 arcmin
Partial Coding Fraction: 0.2011719 [ including projection effects ]
Duration
T90: 26.880000025034 +/-
Measured from: 0
to: 26.880000025034 [s; relative to TRIGTIME]
T50: 26.880000025034 +/-
Measured from: 0
to: 26.880000025034 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 26.880000025034 second)
Measured from: -1.49011611938477e-08
to: 26.8800000101328 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 26.880000025034 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.538850 -0.001431 -0.044875 0.045722
0.094604 0.072853 0.062092 0.055419 [error]
Peak 0.538850 -0.001431 -0.044875 0.045722
0.094604 0.072853 0.062092 0.055419 [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 1.70e-07 3.45e-08 3.46e-09 3.80e-10 2.08e-07 2.09e-07 erg/cm2
Error 6.44e-08 2.77e-08 8.83e-09 2.77e-09 8.86e-08 8.89e-08 erg/cm2
Peak flux Power-law 2.21e-01 2.60e-02 1.30e-03 6.86e-05 2.48e-01 2.49e-01 ph/cm2/s
Error 8.34e-02 2.26e-02 3.20e-03 4.55e-04 9.62e-02 9.62e-02 ph/cm2/s
Fluence Cutoff-PL 1.99e-07 1.90e-08 8.94e-12 2.28e-19 2.18e-07 2.18e-07 erg/cm2
Error 6.97e-08 2.29e-08 0.00e+00 7.88e-08 7.88e-08 0.00e+00 erg/cm2
Peak flux Cutoff-PL 2.21e-01 2.60e-02 1.30e-03 6.81e-05 2.48e-01 2.48e-01 ph/cm2/s
Error 8.33e-02 2.26e-02 3.19e-03 4.51e-04 9.62e-02 9.62e-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 5.253 1.608 - - 1.26e-04 2.20e-04 59.270 57
CPL -4.991 0.000 13.5 0.0 6.59e+04 0.00e+00 55.380 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 5.253 1.608 - - 1.26e-04 2.20e-04 59.270 57
CPL -4.991 0.000 13.5 0.0 6.59e+04 0.00e+00 55.380 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 26.880 0.000 26.880
T90 26.880 0.000 26.880
T50 26.880 0.000 26.880
Peak 26.880 -0.000 26.880
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
234.7451 +19.2925 0.0524 52.2 -1.4 0.8980 3.7 TRIG_00355042
------------------------------------------
Foreground time interval of the image:
0.000 26.880 (delta_t = 26.880 [sec])
Background time interval of the image:
-60.288 -44.288 (delta_t = 16.000 [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 26.880 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.25346 ( -1.30996 1.90607 )
Norm@50keV : 1.26472E-04 ( -0.000125863 0.000313619 )
------------------------------------------------------------
# Chi-Squared = 59.27 using 59 PHA bins.
# Reduced chi-squared = 1.040 for 57 degrees of freedom
# Null hypothesis probability = 3.926084e-01
Photon flux (15-150 keV) in 26.88 sec: 0.248107 ( -0.0956634 0.096774 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.08497e-07 ( -8.54612e-08 9.18296e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 26.880 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.99140 ( )
Epeak [keV] : 13.4806 ( )
Norm@50keV : 6.58938E+04 ( )
------------------------------------------------------------
# Chi-Squared = 55.38 using 59 PHA bins.
# Reduced chi-squared = 0.9890 for 56 degrees of freedom
# Null hypothesis probability = 4.981882e-01
Photon flux (15-150 keV) in 26.88 sec: 0.247870 ( -0.095694 0.096723 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.18066e-07 ( -7.81603e-08 7.93476e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 26.880 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.08421 ( 0.407607 7.7974 )
beta : -5.32012 ( -2.05858 1.15058 )
Epeak [keV] : 9.65320 ( -9.6532 -9.6532 )
Norm@50keV : 1.60478E-02 ( -0.0161187 0.0435623 )
------------------------------------------------------------
# Chi-Squared = 59.27 using 59 PHA bins.
# Reduced chi-squared = 1.078 for 55 degrees of freedom
# Null hypothesis probability = 3.226759e-01
Photon flux (15-150 keV) in 26.88 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 26.880 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.25346 ( -1.30996 1.90607 )
Norm@50keV : 1.26472E-04 ( -0.000125863 0.000313619 )
------------------------------------------------------------
# Chi-Squared = 59.27 using 59 PHA bins.
# Reduced chi-squared = 1.040 for 57 degrees of freedom
# Null hypothesis probability = 3.926084e-01
Photon flux (15-150 keV) in 26.88 sec: 0.248107 ( -0.0956634 0.096774 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.08497e-07 ( -8.54612e-08 9.18296e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 26.880 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.99140 ( )
Epeak [keV] : 13.4806 ( )
Norm@50keV : 6.58938E+04 ( )
------------------------------------------------------------
# Chi-Squared = 55.38 using 59 PHA bins.
# Reduced chi-squared = 0.9890 for 56 degrees of freedom
# Null hypothesis probability = 4.981882e-01
Photon flux (15-150 keV) in 26.88 sec: 0.247870 ( -0.095694 0.096723 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.18066e-07 ( -7.81603e-08 7.93476e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 26.880 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.08421 ( 0.407607 7.7974 )
beta : -5.32012 ( -2.05858 1.15058 )
Epeak [keV] : 9.65320 ( -9.6532 -9.6532 )
Norm@50keV : 1.60478E-02 ( -0.0161187 0.0435623 )
------------------------------------------------------------
# Chi-Squared = 59.27 using 59 PHA bins.
# Reduced chi-squared = 1.078 for 55 degrees of freedom
# Null hypothesis probability = 3.226759e-01
Photon flux (15-150 keV) in 26.88 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Thu Jun 18 04:15:31 EDT 2009