batgrbproduct Analysis for Trigger=153465
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): Thu Jan 10 18:55:24 EST 2008
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger153465/SDC
======================================================================
Trigger: 00153465 Segment: 000
BAT Trigger Time: 147475928 [s; MET]
Trigger Stop: 147475992 [s; MET]
UTC: 2005-09-03T21:32:08.290320 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 78.5634399532341 Dec: 16.2103944524969 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 17.35
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 17.35
Flight Position: [ source = BAT ]
RA: 78.5634399532341 Dec: 16.2103944524969 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 78.5032548699619 Dec: 16.1480806491882 [deg; J2000]
{ 05h 14m 00.8s , +16d 08' 53.1" }
+/- 1.37892765966748 [arcmin] (estimated 90% radius based on SNR)
+/- 2.6953726263786 [arcmin] (formal 1-sigma fit error)
SNR: 19.2208860531291
RA = 5h 14m 0.8s (78.503255 deg.)
Dec = 16d 8' 53" (16.148081 deg.)
Angular difference between Flight and Ground position is 5.099653 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 80 +/- 16
Measured from: -12
to: 68 [s; relative to TRIGTIME]
T50: 32 +/- 16
Measured from: 4
to: 36 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 27.5
to: 28.5 [s; relative to TRIGTIME]
Total Fluence
Measured from: -12
to: 84 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.047998 0.959423 0.454471 0.098526
0.048664 0.048668 0.042163 0.039058 [error]
Peak 0.287642 0.261208 0.146990 0.013532
0.019979 0.019845 0.017183 0.015820 [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 2.96e-07 3.87e-07 3.71e-07 6.32e-07 1.26e-06 1.69e-06 erg/cm2
Error 3.10e-08 2.42e-08 4.23e-08 1.51e-07 9.16e-08 1.88e-07 erg/cm2
Peak flux Power-law 1.60e-01 1.22e-01 6.21e-02 4.55e-02 3.65e-01 3.90e-01 ph/cm2/s
Error 2.26e-02 1.05e-02 9.23e-03 1.35e-02 3.21e-02 3.36e-02 ph/cm2/s
Fluence Cutoff-PL 2.96e-07 3.88e-07 3.71e-07 6.27e-07 1.26e-06 1.68e-06 erg/cm2
Error 3.10e-08 2.43e-08 4.23e-08 1.50e-07 9.16e-08 1.87e-07 erg/cm2
Peak flux Cutoff-PL 1.60e-01 1.22e-01 6.21e-02 4.52e-02 3.65e-01 3.89e-01 ph/cm2/s
Error 2.26e-02 1.05e-02 9.24e-03 1.34e-02 3.21e-02 3.36e-02 ph/cm2/s
Fluence Band 2.87e-07 3.85e-07 3.75e-07 6.47e-07 4.07e-06 1.77e-06 erg/cm2
Error 1.93e-08 2.43e-08 3.07e-08 8.53e-05 1.86e-07 0.00e+00 erg/cm2
Peak flux Band 1.60e-01 1.22e-01 6.21e-02 4.52e-02 3.65e-01 3.89e-01 ph/cm2/s
Error 2.26e-02 1.05e-02 9.24e-03 1.35e-02 3.21e-02 3.36e-02 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.061 0.139 - - 1.42e-03 1.12e-04 45.563 57
CPL 1.997 0.000 5.0 0.0 1.49e-03 0.00e+00 46.026 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.972 0.183 - - 2.46e-03 2.66e-04 58.994 57
CPL 1.934 0.000 95.5 5000.0 2.57e-03 0.00e+00 59.122 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: 62.016000 sec.
T50 in the 50-300 keV band: 27.968000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 96.000 -12.000 84.000
T90 80.000 -12.000 68.000
T50 32.000 4.000 36.000
Peak 1.000 27.500 28.500
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
78.5033 +16.1481 0.0100 2.1 58.0 2.7860 19.2 TRIG_00153465
------------------------------------------
Foreground time interval of the image:
-12.000 76.805 (delta_t = 88.805 [sec])
Background time interval of the image:
-60.000 -12.000 (delta_t = 48.000 [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 -12.000 sec. to 84.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.06141 ( -0.136938 0.140856 )
Norm@50keV : 1.422737E-03 ( -1.130013E-04 1.108452E-04) )
------------------------------------------------------------
Chi-Squared = 45.56335 using 59 PHA bins.
Reduced chi-squared = 0.7993569 for 57 degrees of freedom
Null hypothesis probability = 0.862
Photon flux (15-150 keV) in 96.00 sec: 0.219664 ( -0.014326 0.014411 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.26454e-06 ( -9.08736e-08 9.23808e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -12.000 sec. to 84.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.99691 ( )
Epeak [keV] : 5.03439 ( )
Norm@50keV : 1.490520E-03 ( )
------------------------------------------------------------
Chi-Squared = 46.02599 using 59 PHA bins.
Reduced chi-squared = 0.8218927 for 56 degrees of freedom
Null hypothesis probability = 0.827
Photon flux (15-150 keV) in 96.00 sec: 0.219556 ( -0.014319 0.014405 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.26446e-06 ( -9.09888e-08 9.22848e-08 ) ergs/cm2
Band function
Time interval is from -12.000 sec. to 84.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.55316 ( -8.44684 6.55316 )
beta : -2.06055 ( -0.141639 0.135979 )
Epeak [keV] : 10.9352 ( -10.8352 202.010 )
Norm@50keV : 4.792414E-03 ( -4.792414E-03 109.426 )
------------------------------------------------------------
Chi-Squared = 45.56353 using 59 PHA bins.
Reduced chi-squared = 0.8284277 for 55 degrees of freedom
Null hypothesis probability = 0.814
Photon flux (15-150 keV) in 96.00 sec: 0.219447 ( -0.013735 0.06535 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.07323e-06 ( -2.28538e-06 0.000168288 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 20.000 sec. to 36.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.97230 ( -0.179597 0.187258 )
Norm@50keV : 2.464924E-03 ( -2.700405E-04 2.627335E-04) )
------------------------------------------------------------
Chi-Squared = 58.99400 using 59 PHA bins.
Reduced chi-squared = 1.034983 for 57 degrees of freedom
Null hypothesis probability = 0.402
Photon flux (15-150 keV) in 16.00 sec: 0.365109 ( -0.032031 0.032118 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.63221e-07 ( -3.7272e-08 3.79984e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 20.000 sec. to 36.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.93405 ( )
Epeak [keV] : 95.4935 ( -15.9969 9983.99 )
Norm@50keV : 2.571288E-03 ( )
------------------------------------------------------------
Chi-Squared = 59.12181 using 59 PHA bins.
Reduced chi-squared = 1.055747 for 56 degrees of freedom
Null hypothesis probability = 0.362
Photon flux (15-150 keV) in 16.00 sec: 0.364947 ( -0.032017 0.032106 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.63187e-07 ( -3.72832e-08 3.79984e-08 ) ergs/cm2
Band function
Time interval is from 20.000 sec. to 36.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.64327 ( -8.134842E-04 14.9992 )
beta : -1.94927 ( -0.187438 0.179256 )
Epeak [keV] : 10.6147 ( -10.5147 9989.39 )
Norm@50keV : 5.681823E-03 ( -3.676003E-02 3.570676E-02) )
------------------------------------------------------------
Chi-Squared = 59.03736 using 59 PHA bins.
Reduced chi-squared = 1.073407 for 55 degrees of freedom
Null hypothesis probability = 0.330
Photon flux (15-150 keV) in 16.00 sec: 0.364953 ( -0.032043 0.032086 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.6848e-07 ( 0 0 ) ergs/cm2
Plot creation:
Thu Jan 10 19:02:54 EST 2008