batgrbproduct Analysis for Trigger=145563
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): Mon Jan 7 12:43:32 EST 2008
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger145563/GCN5_download_cron
======================================================================
Trigger: 00145563 Segment: 000
BAT Trigger Time: 142862737.6 [s; MET]
Trigger Stop: 142862764.48 [s; MET]
UTC: 2005-07-12T12:05:37.981940 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 34.7893411424008 Dec: 36.0151252154581 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 33377
Image Trigger?: NO
Rate S/N Ratio: 47.1274866717927 [ if not an image trigger ]
Image S/N Ratio: 33377
Flight Position: [ source = BAT ]
RA: 34.7893411424008 Dec: 36.0151252154581 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 34.8002829359367 Dec: 36.0019903195646 [deg; J2000]
{ 02h 19m 12.1s , +36d 00' 07.2" }
+/- 2.88648120489586 [arcmin] (estimated 90% radius based on SNR)
+/- 1.64370408054852 [arcmin] (formal 1-sigma fit error)
SNR: 6.69034879719465
RA = 2h 19m 12.1s (34.800283 deg.)
Dec = 36d 0' 7" (36.001990 deg.)
Angular difference between Flight and Ground position is 0.950329 arcmin
Partial Coding Fraction: 0.890625 [ including projection effects ]
Duration
T90: 26.8799999952316 +/-
Measured from: 0
to: 26.8799999952316 [s; relative to TRIGTIME]
T50: 26.8799999952316 +/-
Measured from: 0
to: 26.8799999952316 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 26.8799999952316 second)
Measured from: 0
to: 26.8799999952316 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 26.8799999952316 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.227354 0.210290 0.052044 -0.017516
0.065231 0.057556 0.024032 0.018157 [error]
Peak 0.227354 0.210290 0.052044 -0.017516
0.065231 0.057556 0.024032 0.018157 [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 7.70e-08 6.90e-08 4.26e-08 4.00e-08 2.05e-07 2.29e-07 erg/cm2
Error 2.82e-08 2.26e-08 2.21e-08 3.69e-08 6.77e-08 8.39e-08 erg/cm2
Peak flux Power-law 9.47e-02 4.75e-02 1.47e-02 5.76e-03 1.60e-01 1.63e-01 ph/cm2/s
Error 3.53e-02 1.53e-02 7.41e-03 6.01e-03 5.08e-02 5.13e-02 ph/cm2/s
Fluence Cutoff-PL 7.10e-08 1.05e-07 3.36e-08 1.17e-09 2.10e-07 2.10e-07 erg/cm2
Error 3.19e-08 3.85e-08 2.78e-08 1.05e-08 6.28e-08 6.29e-08 erg/cm2
Peak flux Cutoff-PL 8.45e-02 7.15e-02 1.26e-02 2.41e-04 1.69e-01 1.69e-01 ph/cm2/s
Error 3.83e-02 2.59e-02 9.75e-03 1.81e-03 5.20e-02 5.20e-02 ph/cm2/s
Fluence Band 7.00e-08 9.88e-08 3.88e-08 2.67e-09 2.12e-07 2.14e-07 erg/cm2
Error 2.32e-08 2.95e-08 2.20e-08 2.09e-08 6.23e-08 6.79e-08 erg/cm2
Peak flux Band 8.74e-02 6.74e-02 1.42e-02 5.42e-04 1.69e-01 1.69e-01 ph/cm2/s
Error 2.55e-02 1.97e-02 4.13e-03 3.24e-03 5.16e-02 5.12e-02 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.696 0.507 - - 7.19e-04 2.97e-04 51.565 57
CPL -0.192 2.501 28.4 19.0 4.70e-02 9.44e-01 47.100 0
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.696 0.507 - - 7.19e-04 2.97e-04 51.565 57
CPL -0.192 2.501 28.4 19.0 4.70e-02 9.44e-01 47.100 0
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
34.8003 +36.0020 0.0286 26.2 -7.9 0.8808 6.7 TRIG_00145563
------------------------------------------
Foreground time interval of the image:
0.000 26.880 (delta_t = 26.880 [sec])
Background time interval of the image:
-60.600 -41.600 (delta_t = 19.000 [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.
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: 2.69615 ( -0.459473 0.554523 )
Norm@50keV : 7.194757E-04 ( -3.000092E-04 2.943693E-04) )
------------------------------------------------------------
Chi-Squared = 51.56483 using 59 PHA bins.
Reduced chi-squared = 0.9046462 for 57 degrees of freedom
Null hypothesis probability = 0.678
Photon flux (15-150 keV) in 26.88 sec: 0.160143 ( -0.050749 0.050835 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.05427e-07 ( -6.73094e-08 6.81096e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 26.880 sec.
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.191648 ( -2.80835 2.19325 )
Epeak [keV] : 28.3980 ( -28.3880 9.67979 )
Norm@50keV : 4.700242E-02 ( -4.700242E-02 1.84013 )
------------------------------------------------------------
Chi-Squared = 47.09997 using 59 PHA bins.
but latest trial 2.00161 gives Chi-Squared = 10.4708
Reduced chi-squared = 0.8410710 for 56 degrees of freedom
Null hypothesis probability = 0.796
Photon flux (15-150 keV) in 26.88 sec: 0.168805 ( -0.05203 0.052037 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.1021e-07 ( -6.23562e-08 6.32755e-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 : -0.821046 ( -1.51939 5.82105 )
beta : -9.28538 ( -0.714623 6.55732 )
Epeak [keV] : 24.0029 ( -12.4291 8.04640 )
Norm@50keV : 1.096285E-02 ( -0.216015 209.973 )
------------------------------------------------------------
Chi-Squared = 47.58920 using 59 PHA bins.
Reduced chi-squared = 0.8652581 for 55 degrees of freedom
Null hypothesis probability = 0.751
Photon flux (15-150 keV) in 26.88 sec: 0.169450 ( -0.077491 0.025671 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.12371e-07 ( -6.23194e-08 6.23404e-08 ) 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: 2.69615 ( -0.459473 0.554523 )
Norm@50keV : 7.194757E-04 ( -3.000092E-04 2.943693E-04) )
------------------------------------------------------------
Chi-Squared = 51.56483 using 59 PHA bins.
Reduced chi-squared = 0.9046462 for 57 degrees of freedom
Null hypothesis probability = 0.678
Photon flux (15-150 keV) in 26.88 sec: 0.160143 ( -0.050749 0.050835 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.05427e-07 ( -6.73094e-08 6.81096e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 26.880 sec.
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.191648 ( -2.80835 2.19325 )
Epeak [keV] : 28.3980 ( -28.3880 9.67979 )
Norm@50keV : 4.700242E-02 ( -4.700242E-02 1.84013 )
------------------------------------------------------------
Chi-Squared = 47.09997 using 59 PHA bins.
but latest trial 2.00161 gives Chi-Squared = 10.4708
Reduced chi-squared = 0.8410710 for 56 degrees of freedom
Null hypothesis probability = 0.796
Photon flux (15-150 keV) in 26.88 sec: 0.168805 ( -0.05203 0.052037 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.1021e-07 ( -6.23562e-08 6.32755e-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 : -0.821046 ( -7.41173 5.82105 )
beta : -9.28538 ( -0.714623 19.2853 )
Epeak [keV] : 24.0029 ( -12.9786 8.04640 )
Norm@50keV : 1.096285E-02 ( -0.216015 209.973 )
------------------------------------------------------------
Chi-Squared = 47.58920 using 59 PHA bins.
Reduced chi-squared = 0.8652581 for 55 degrees of freedom
Null hypothesis probability = 0.751
Photon flux (15-150 keV) in 26.88 sec: 0.169450 ( -0.077491 0.025671 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.12371e-07 ( -6.23194e-08 6.23404e-08 ) ergs/cm2
Plot creation:
Mon Jan 7 12:55:53 EST 2008