batgrbproduct Analysis for Trigger=111063
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 21:38:11 EST 2008
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger111063/SDC
======================================================================
Trigger: 00111063 Segment: 000
BAT Trigger Time: 132613181.952 [s; MET]
Trigger Stop: 132613182.976 [s; MET]
UTC: 2005-03-15T20:59:42.518900 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 306.472217474461 Dec: -42.5872492239099 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8
Image Trigger?: NO
Rate S/N Ratio: 17.1464281994822 [ if not an image trigger ]
Image S/N Ratio: 8
Flight Position: [ source = BAT ]
RA: 306.472217474461 Dec: -42.5872492239099 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 306.472730861243 Dec: -42.5877571863594 [deg; J2000]
{ 20h 25m 53.5s , -42d 35' 15.9" }
+/- 1.10290873668191 [arcmin] (estimated 90% radius based on SNR)
+/- 0.289549153662462 [arcmin] (formal 1-sigma fit error)
SNR: 26.4452426157326
RA = 20h 25m 53.5s (306.472731 deg.)
Dec = -42d 35' 16" (-42.587757 deg.)
Angular difference between Flight and Ground position is 0.037990 arcmin
Partial Coding Fraction: 0.515625 [ including projection effects ]
Duration
T90: 95.5600000023842 +/- 14.0200616236825
Measured from: -48.0040000081062
to: 47.555999994278 [s; relative to TRIGTIME]
T50: 24.3440000116825 +/- 1.4984418541017
Measured from: 0.139999985694885
to: 24.4839999973774 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 24.6039999872446
to: 25.6039999872446 [s; relative to TRIGTIME]
Total Fluence
Measured from: -56.108000010252
to: 69.1799999922514 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.169785 2.128385 1.102459 0.245574
0.076091 0.072412 0.060018 0.049540 [error]
Peak 0.079291 0.078829 0.040399 0.001146
0.007975 0.007619 0.005899 0.004589 [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 7.86e-07 9.97e-07 9.24e-07 1.50e-06 3.22e-06 4.20e-06 erg/cm2
Error 6.06e-08 4.47e-08 6.26e-08 2.17e-07 1.46e-07 2.68e-07 erg/cm2
Peak flux Power-law 9.29e-01 6.33e-01 2.82e-01 1.74e-01 1.93e+00 2.02e+00 ph/cm2/s
Error 1.49e-01 7.00e-02 4.98e-02 5.79e-02 2.18e-01 2.24e-01 ph/cm2/s
Fluence Cutoff-PL 7.48e-07 1.02e-06 9.30e-07 1.00e-06 3.14e-06 3.77e-06 erg/cm2
Error 7.51e-08 5.29e-08 6.55e-08 4.98e-07 1.69e-07 6.48e-07 erg/cm2
Peak flux Cutoff-PL 8.67e-01 6.82e-01 2.87e-01 8.36e-02 1.89e+00 1.92e+00 ph/cm2/s
Error 1.67e-01 9.02e-02 5.58e-02 8.23e-02 2.22e-01 2.35e-01 ph/cm2/s
Fluence Band 1.06e-06 1.36e-06 1.22e-06 1.98e-06 4.25e-06 4.53e-06 erg/cm2
Error 8.35e-07 1.49e-06 2.92e-06 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Peak flux Band 8.67e-01 6.82e-01 2.87e-01 8.38e-02 1.89e+00 1.92e+00 ph/cm2/s
Error 1.67e-01 9.02e-02 5.58e-02 8.24e-02 2.22e-01 2.35e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.111 0.089 - - 2.76e-03 1.34e-04 52.636 57
CPL 1.816 0.273 29.9 20.1 3.91e-03 1.48e-03 50.780 0
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.165 0.200 - - 1.19e-02 1.61e-03 53.181 57
CPL 1.533 0.659 32.2 24.3 2.70e-02 3.37e-02 50.876 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: 28.544000 sec.
T50 in the 50-300 keV band: 15.232000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 125.288 -56.108 69.180
T90 95.560 -48.004 47.556
T50 24.344 0.140 24.484
Peak 1.000 24.604 25.604
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
306.4727 -42.5878 0.0073 39.5 -27.3 3.3890 26.4 TRIG_00111063
------------------------------------------
Foreground time interval of the image:
-56.108 17.853 (delta_t = 73.961 [sec])
Background time interval of the image:
-299.952 -56.108 (delta_t = 243.844 [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 -56.108 sec. to 69.180 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.11111 ( -8.860993E-02 9.002256E-02) )
Norm@50keV : 2.758748E-03 ( -1.346224E-04 1.336136E-04) )
------------------------------------------------------------
Chi-Squared = 52.63609 using 59 PHA bins.
Reduced chi-squared = 0.9234402 for 57 degrees of freedom
Null hypothesis probability = 0.639
Photon flux (15-150 keV) in 125.3 sec: 0.436417 ( -0.021506 0.021647 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.21536e-06 ( -1.45874e-07 1.45899e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -56.108 sec. to 69.180 sec.
Photon index: 1.81596 ( -0.356003 0.190050 )
Epeak [keV] : 29.9167 ( -24.8479 15.3243 )
Norm@50keV : 3.907471E-03 ( -9.656004E-04 2.003646E-03) )
------------------------------------------------------------
Chi-Squared = 50.77960 using 59 PHA bins.
but latest trial 2.00765 gives Chi-Squared = 5.83931
but latest trial 5.06912 gives Chi-Squared = 8.58581
but latest trial 2.933189E-03 gives Chi-Squared = 3.10972
Reduced chi-squared = 0.9067786 for 56 degrees of freedom
Null hypothesis probability = 0.672
Photon flux (15-150 keV) in 125.3 sec: 0.427168 ( -0.024144 0.024231 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.14425e-06 ( -1.72024e-07 1.65333e-07 ) ergs/cm2
Band function
Time interval is from -56.108 sec. to 69.180 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.77872 ( -8.22128 3.04237 )
beta : -2.33186 ( -6.91112 1.02894 )
Epeak [keV] : 30.4553 ( -31.4164 12.8197 )
Norm@50keV : 4.127286E-03 ( -7.748657E-04 2.182488E-03) )
------------------------------------------------------------
Chi-Squared = 50.89483 using 59 PHA bins.
Reduced chi-squared = 0.9253606 for 55 degrees of freedom
Null hypothesis probability = 0.632
Photon flux (15-150 keV) in 125.3 sec: 0.427173 ( -0.02418 0.024269 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.25287e-06 ( -5.25433e-07 5.32405e-06 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 24.604 sec. to 25.604 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.16458 ( -0.194955 0.206008 )
Norm@50keV : 1.186900E-02 ( -1.626539E-03 1.589724E-03) )
------------------------------------------------------------
Chi-Squared = 53.18128 using 59 PHA bins.
Reduced chi-squared = 0.9330049 for 57 degrees of freedom
Null hypothesis probability = 0.619
Photon flux (15-150 keV) in 1.000 sec: 1.92908 ( -0.21827 0.21859 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.11087e-07 ( -1.35592e-08 1.3678e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 24.604 sec. to 25.604 sec.
Parameters : value lower 90% higher 90%
Photon index: 1.53329 ( -0.851695 0.466222 )
Epeak [keV] : 32.2257 ( -31.7651 16.7953 )
Norm@50keV : 2.697553E-02 ( -1.339595E-02 5.396357E-02) )
------------------------------------------------------------
Chi-Squared = 50.87631 using 59 PHA bins.
but latest trial -0.152096 gives Chi-Squared = 214.721
but latest trial 1.350892E-02 gives Chi-Squared = 5.19935
Reduced chi-squared = 0.9085056 for 56 degrees of freedom
Null hypothesis probability = 0.669
Photon flux (15-150 keV) in 1.000 sec: 1.89409 ( -0.22228 0.22233 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.07085e-07 ( -1.42495e-08 1.4321e-08 ) ergs/cm2
Band function
Time interval is from 24.604 sec. to 25.604 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.54103 ( -8.45897 0.839840 )
beta : -8.11155 ( -1.88845 6.04229 )
Epeak [keV] : 32.0830 ( -31.9830 16.9467 )
Norm@50keV : 2.669614E-02 ( -1.365702E-02 5.421852E-02) )
------------------------------------------------------------
Chi-Squared = 50.87669 using 59 PHA bins.
Reduced chi-squared = 0.9250307 for 55 degrees of freedom
Null hypothesis probability = 0.633
Photon flux (15-150 keV) in 1.000 sec: 1.89422 ( -0.2225 0.22221 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.0686e-07 ( -1.4163e-08 1.4358e-08 ) ergs/cm2
Plot creation:
Fri Jan 4 21:52:59 EST 2008