batgrbproduct Analysis for Trigger=111622
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): Fri Jan 4 22:02:53 EST 2008
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger111622/SDC
======================================================================
Trigger: 00111622 Segment: 000
BAT Trigger Time: 132917477.888 [s; MET]
Trigger Stop: 132917478.912 [s; MET]
UTC: 2005-03-19T09:31:18.449780 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 154.15754637319 Dec: 43.5655654162315 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10
Image Trigger?: NO
Rate S/N Ratio: 11.5758369027902 [ if not an image trigger ]
Image S/N Ratio: 10
Flight Position: [ source = BAT ]
RA: 154.15754637319 Dec: 43.5655654162315 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 154.182917078519 Dec: 43.5636892566784 [deg; J2000]
{ 10h 16m 43.9s , +43d 33' 49.3" }
+/- 2.40210923091068 [arcmin] (estimated 90% radius based on SNR)
+/- 0.875199060532852 [arcmin] (formal 1-sigma fit error)
SNR: 8.69790076261948
RA = 10h 16m 43.9s (154.182917 deg.)
Dec = 43d 33' 49" (43.563689 deg.)
Angular difference between Flight and Ground position is 1.108742 arcmin
Partial Coding Fraction: 0.4414062 [ including projection effects ]
Duration
T90: 152.543999999762 +/- 10.9553911899328
Measured from: -133.127999991179
to: 19.4160000085831 [s; relative to TRIGTIME]
T50: 124.732000008225 +/- 4.14837799313612
Measured from: -120.119999989867
to: 4.61200001835823 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.351999998092651
to: 1.35199999809265 [s; relative to TRIGTIME]
Total Fluence
Measured from: -134.039999991655
to: 28.9520000070333 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.933231 0.901740 0.463727 0.099613
0.075860 0.076376 0.065979 0.057756 [error]
Peak 0.055129 0.071429 0.032605 -0.001303
0.007675 0.007698 0.006381 0.005233 [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 3.19e-07 4.14e-07 3.93e-07 6.63e-07 1.35e-06 1.78e-06 erg/cm2
Error 4.56e-08 3.95e-08 6.60e-08 2.23e-07 1.50e-07 2.92e-07 erg/cm2
Peak flux Power-law 7.14e-01 5.03e-01 2.34e-01 1.52e-01 1.52e+00 1.60e+00 ph/cm2/s
Error 1.39e-01 6.84e-02 5.33e-02 6.55e-02 2.09e-01 2.18e-01 ph/cm2/s
Fluence Cutoff-PL 3.15e-07 4.20e-07 3.93e-07 5.27e-07 1.33e-06 1.65e-06 erg/cm2
Error 5.02e-08 4.86e-08 6.78e-08 3.32e-07 1.64e-07 4.21e-07 erg/cm2
Peak flux Cutoff-PL 6.65e-01 5.43e-01 2.37e-01 7.05e-02 1.49e+00 1.51e+00 ph/cm2/s
Error 1.59e-01 9.25e-02 6.00e-02 1.02e-01 2.14e-01 2.35e-01 ph/cm2/s
Fluence Band 3.15e-07 4.15e-07 3.91e-07 6.49e-07 1.34e-06 1.77e-06 erg/cm2
Error 3.34e-08 4.93e-08 6.75e-08 3.01e-07 1.52e-07 3.03e-07 erg/cm2
Peak flux Band 6.65e-01 5.43e-01 2.37e-01 7.06e-02 1.49e+00 1.52e+00 ph/cm2/s
Error 1.59e-01 9.31e-02 6.00e-02 1.02e-01 2.14e-01 2.37e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.073 0.191 - - 8.92e-04 1.07e-04 45.634 57
CPL 1.820 0.000 32.3 4998.9 1.22e-03 1.02e-03 45.619 0
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.106 0.257 - - 9.66e-03 1.67e-03 60.214 57
CPL 1.460 0.961 36.2 4999.8 2.24e-02 5.81e-02 59.005 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: 140.032000 sec.
T50 in the 50-300 keV band: 100.864000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 162.992 -134.040 28.952
T90 152.544 -133.128 19.416
T50 124.732 -120.120 4.612
Peak 1.000 0.352 1.352
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
154.1829 +43.5637 0.0223 37.1 158.0 1.0246 8.7 TRIG_00111622
------------------------------------------
Foreground time interval of the image:
-62.483 14.117 (delta_t = 76.600 [sec])
Background time interval of the image:
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 -134.040 sec. to 28.952 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.07311 ( -0.185669 0.195373 )
Norm@50keV : 8.918140E-04 ( -1.086519E-04 1.058111E-04) )
------------------------------------------------------------
Chi-Squared = 45.63446 using 59 PHA bins.
Reduced chi-squared = 0.8006045 for 57 degrees of freedom
Null hypothesis probability = 0.860
Photon flux (15-150 keV) in 163.0 sec: 0.138472 ( -0.013434 0.013457 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.34734e-06 ( -1.48454e-07 1.50596e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -134.040 sec. to 28.952 sec.
Parameters : value lower 90% higher 90%
Photon index: 1.81981 ( )
Epeak [keV] : 32.2893 ( -26.1868 9971.61 )
Norm@50keV : 1.221960E-03 ( -4.376896E-04 1.594656E-03) )
------------------------------------------------------------
Chi-Squared = 45.61932 using 59 PHA bins.
but latest trial 2.20634 gives Chi-Squared = 1.740646E-02
but latest trial 7.084066E-04 gives Chi-Squared = 7.53414
Reduced chi-squared = 0.8146308 for 56 degrees of freedom
Null hypothesis probability = 0.838
Photon flux (15-150 keV) in 163.0 sec: 0.137703 ( -0.013619 0.013896 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.33316e-06 ( -1.66752e-07 1.6115e-07 ) ergs/cm2
Band function
Time interval is from -134.040 sec. to 28.952 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.59330 ( -7.62590 4.37094 )
beta : -8.71901 ( -0.195613 0.185746 )
Epeak [keV] : 38.1452 ( -38.0452 9961.85 )
Norm@50keV : 1.628329E-03 ( -1.476851E-02 1.438201E-02) )
------------------------------------------------------------
Chi-Squared = 46.19090 using 59 PHA bins.
Reduced chi-squared = 0.8398345 for 55 degrees of freedom
Null hypothesis probability = 0.795
Photon flux (15-150 keV) in 163.0 sec: 0.137704 ( -0.013991 0.013911 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.34204e-06 ( -1.49535e-07 1.53546e-07 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.352 sec. to 1.352 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.10629 ( -0.246191 0.268026 )
Norm@50keV : 9.655978E-03 ( -1.700202E-03 1.641927E-03) )
------------------------------------------------------------
Chi-Squared = 60.21437 using 59 PHA bins.
Reduced chi-squared = 1.056393 for 57 degrees of freedom
Null hypothesis probability = 0.360
Photon flux (15-150 keV) in 1.000 sec: 1.52387 ( -0.20869 0.20885 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.97438e-08 ( -1.40481e-08 1.43542e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.352 sec. to 1.352 sec.
Photon index: 1.45967 ( -1.28241 0.639664 )
Epeak [keV] : 36.2483 ( -35.9034 9963.75 )
Norm@50keV : 2.242266E-02 ( -1.614538E-02 0.100019 )
------------------------------------------------------------
Chi-Squared = 59.00504 using 59 PHA bins.
but latest trial 2.01846 gives Chi-Squared = 1.57624
but latest trial 2.18167 gives Chi-Squared = 0.742001
but latest trial 6.954957E-03 gives Chi-Squared = 7.77384
Reduced chi-squared = 1.053661 for 56 degrees of freedom
Null hypothesis probability = 0.366
Photon flux (15-150 keV) in 1.000 sec: 1.49437 ( -0.21417 0.21336 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.59952e-08 ( -1.50259e-08 1.53918e-08 ) ergs/cm2
Band function
Time interval is from 0.352 sec. to 1.352 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.47386 ( -8.52614 1.27255 )
beta : -8.91435 ( -1.08565 6.99242 )
Epeak [keV] : 36.1574 ( -36.0574 9963.84 )
Norm@50keV : 2.201179E-02 ( -1.275979E-02 0.100435 )
------------------------------------------------------------
Chi-Squared = 59.00595 using 59 PHA bins.
Reduced chi-squared = 1.072836 for 55 degrees of freedom
Null hypothesis probability = 0.331
Photon flux (15-150 keV) in 1.000 sec: 1.49437 ( -0.21419 0.21372 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.57542e-08 ( -1.48788e-08 1.55458e-08 ) ergs/cm2
Plot creation:
Fri Jan 4 22:29:01 EST 2008