batgrbproduct Analysis for Trigger=456967
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 batgrbproduct analysis is using the flight position for the mask-weighting calculation.
- 4) This page will be updated for up to 10 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Sun Jul 10 20:10:17 EDT 2011
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger456967/GCN5_download_cron
======================================================================
Trigger: 00456967 Segment: 000
BAT Trigger Time: 331939966.976 [s; MET]
Trigger Stop: 331939968 [s; MET]
UTC: 2011-07-09T21:32:39.835840 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 164.614495443872 Dec: -23.4839881602794 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.39
Image Trigger?: NO
Rate S/N Ratio: 12.4899959967968 [ if not an image trigger ]
Image S/N Ratio: 7.39
Flight Position: [ source = BAT ]
RA: 164.614495443872 Dec: -23.4839881602794 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 164.667945661216 Dec: -23.4698645026077 [deg; J2000]
{ 10h 58m 40.3s , -23d 28' 11.5" }
+/- 1.11725593738325 [arcmin] (estimated 90% radius based on SNR)
+/- 0.384016247043988 [arcmin] (formal 1-sigma fit error)
SNR: 25.9614442931039
Angular difference between Flight and Ground position is 3.061171 arcmin
Partial Coding Fraction: 0.578125 [ including projection effects ]
Duration
T90: 55.6679999828339 +/- 3.26235494540234
Measured from: -15.3679999113083
to: 40.3000000715256 [s; relative to TRIGTIME]
T50: 21.8879999518394 +/- 0.961665232528948
Measured from: 6.35600012540817
to: 28.2440000772476 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 13.5879999995232
to: 14.5879999995232 [s; relative to TRIGTIME]
Total Fluence
Measured from: -27.3600000143051
to: 46.7159999608994 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.979197 4.847427 4.257513 1.245849
0.069189 0.075230 0.069478 0.056361 [error]
Peak 0.078505 0.156977 0.140043 0.049358
0.009312 0.010801 0.010381 0.008094 [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 9.86e-07 2.06e-06 3.36e-06 1.24e-05 9.28e-06 1.88e-05 erg/cm2
Error 4.40e-08 5.30e-08 7.60e-08 6.71e-07 1.93e-07 6.96e-07 erg/cm2
Peak flux Power-law 8.25e-01 1.05e+00 9.79e-01 1.60e+00 3.40e+00 4.46e+00 ph/cm2/s
Error 1.21e-01 9.39e-02 8.34e-02 2.90e-01 2.60e-01 3.65e-01 ph/cm2/s
Fluence Cutoff-PL 9.59e-07 2.07e-06 3.40e-06 1.10e-05 9.24e-06 1.74e-05 erg/cm2
Error 5.93e-08 5.46e-08 8.97e-08 1.83e-06 2.05e-07 1.83e-06 erg/cm2
Peak flux Cutoff-PL 7.88e-01 1.07e+00 1.00e+00 1.25e+00 3.37e+00 4.12e+00 ph/cm2/s
Error 1.43e-01 1.04e-01 9.89e-02 4.99e-01 2.66e-01 6.10e-01 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 1.292 0.039 - - 1.27e-02 2.59e-04 44.440 57
CPL 1.196 0.131 497.5 0.0 1.39e-02 1.77e-03 43.230 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.104 0.129 - - 2.93e-02 2.19e-03 39.880 57
CPL 0.888 0.395 280.5 0.0 3.71e-02 1.79e-02 39.250 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: 51.072000 sec.
T50 in the 50-300 keV band: 20.800000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 74.076 -27.360 46.716
T90 55.668 -15.368 40.300
T50 21.888 6.356 28.244
Peak 1.000 13.588 14.588
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
164.6679 -23.4699 0.0074 28.7 147.2 5.1318 26.0 TRIG_00456967
------------------------------------------
Foreground time interval of the image:
-27.360 10.825 (delta_t = 38.185 [sec])
Background time interval of the image:
-36.875 -27.360 (delta_t = 9.515 [sec])
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) The mask-weighted light curves are using the flight position.
- 3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 4) 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.
- 5) 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.
- 6) 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 -27.360 sec. to 46.716 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.29211 ( -0.0385992 0.0384819 )
Norm@50keV : 1.26582E-02 ( -0.000258723 0.000258396 )
------------------------------------------------------------
# Chi-Squared = 44.44 using 59 PHA bins.
# Reduced chi-squared = 0.7797 for 57 degrees of freedom
# Null hypothesis probability = 8.872695e-01
Photon flux (15-150 keV) in 74.08 sec: 1.50798 ( -0.0343646 0.0344627 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.2843e-06 ( -1.92933e-07 1.93037e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -27.360 sec. to 46.716 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.19640 ( -0.152603 0.11015 )
Epeak [keV] : 497.476 ( -497.546 -497.546 )
Norm@50keV : 1.39022E-02 ( -0.00136734 0.00217403 )
------------------------------------------------------------
# Chi-Squared = 43.23 using 59 PHA bins.
# Reduced chi-squared = 0.7720 for 56 degrees of freedom
# Null hypothesis probability = 8.940348e-01
Photon flux (15-150 keV) in 74.08 sec: 1.49698 ( -0.03791 0.03726 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.24333e-06 ( -2.06016e-07 2.04387e-07 ) ergs/cm2
Band function
Time interval is from -27.360 sec. to 46.716 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.532096 ( -0.678265 5.51646 )
beta : -1.33172 ( -0.0612503 0.0541939 )
Epeak [keV] : 68.2631 ( -35.1723 183.465 )
Norm@50keV : 3.62644E-02 ( -0.0202711 16.3423 )
------------------------------------------------------------
# Chi-Squared = 40.59 using 59 PHA bins.
# Reduced chi-squared = 0.7380 for 55 degrees of freedom
# Null hypothesis probability = 9.266740e-01
Photon flux (15-150 keV) in 74.08 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 20.1228 ( )
R^2/D10^2 : 6.41222E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 521.13 using 59 PHA bins.
# Reduced chi-squared = 9.1427 for 57 degrees of freedom
# Null hypothesis probability = 3.669451e-76
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.699e-07 1.496e-08
25- 50 1.850e-06 5.815e-08
50-150 5.558e-06 1.789e-07
15-150 7.778e-06 1.667e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 6.46545 ( )
------------------------------------------------------------
# Chi-Squared = 213.24 using 59 PHA bins.
# Reduced chi-squared = 3.7411 for 57 degrees of freedom
# Null hypothesis probability = 6.754692e-20
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.193e-06 6.060e-07
25- 50 2.294e-06 1.160e-06
50-150 5.032e-06 2.549e-06
15-150 8.518e-06 4.311e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.43249 (-0.637879 0.677939)
R1^2/D10^2 : 0.729778 (-0.161007 0.21943)
kT2 [keV] : 34.0105 (-2.58928 3.26224)
R2^2/D10^2 : 9.48107E-03 (-0.00244229 0.00288231)
------------------------------------------------------------
# Chi-Squared = 38.96 using 59 PHA bins.
# Reduced chi-squared = 0.7084 for 55 degrees of freedom
# Null hypothesis probability = 9.499465e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.381e-07 6.000e-08
25- 50 2.139e-06 8.593e-08
50-150 6.273e-06 2.808e-07
15-150 9.250e-06 4.000e-07
Peak spectrum fit
Power-law model
Time interval is from 13.588 sec. to 14.588 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.10394 ( -0.130055 0.128188 )
Norm@50keV : 2.92782E-02 ( -0.00219465 0.00219396 )
------------------------------------------------------------
# Chi-Squared = 39.88 using 59 PHA bins.
# Reduced chi-squared = 0.6997 for 57 degrees of freedom
# Null hypothesis probability = 9.586278e-01
Photon flux (15-150 keV) in 1 sec: 3.39739 ( -0.260025 0.260241 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.0573e-07 ( -2.55316e-08 2.56566e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 13.588 sec. to 14.588 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.888163 ( -0.509403 0.280056 )
Epeak [keV] : 280.498 ( -280.498 -280.498 )
Norm@50keV : 3.70629E-02 ( -0.0095261 0.0263564 )
------------------------------------------------------------
# Chi-Squared = 39.25 using 59 PHA bins.
# Reduced chi-squared = 0.7010 for 56 degrees of freedom
# Null hypothesis probability = 9.563786e-01
Photon flux (15-150 keV) in 1 sec: 3.37228 ( -0.26556 0.26547 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.02114e-07 ( -2.7226e-08 2.6964e-08 ) ergs/cm2
Band function
Time interval is from 13.588 sec. to 14.588 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.491486 ( -0.00609665 -0.00609665 )
beta : -1.24023 ( -0.267189 0.200921 )
Epeak [keV] : 53.5402 ( -53.3222 166.026 )
Norm@50keV : 0.290179 ( -0.303983 420.534 )
------------------------------------------------------------
# Chi-Squared = 37.47 using 59 PHA bins.
# Reduced chi-squared = 0.6813 for 55 degrees of freedom
# Null hypothesis probability = 9.660571e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 19.6551 (-2.08735 2.426)
R^2/D10^2 : 0.168783 (-0.0526823 0.0743065)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 75.56 using 59 PHA bins.
# Reduced chi-squared = 1.326 for 57 degrees of freedom
# Null hypothesis probability = 5.048726e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.266e-08 1.920e-09
25- 50 6.231e-08 7.410e-09
50-150 1.780e-07 2.255e-08
15-150 2.529e-07 2.690e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.996 ( )
Norm : 13.8221 (-13.8221 -13.8221)
------------------------------------------------------------
# Chi-Squared = 70.76 using 59 PHA bins.
# Reduced chi-squared = 1.241 for 57 degrees of freedom
# Null hypothesis probability = 1.039797e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.440e-08 1.815e-08
25- 50 6.618e-08 3.470e-08
50-150 1.451e-07 7.670e-08
15-150 2.457e-07 1.291e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.31131 (-1.92962 2.25702)
R1^2/D10^2 : 1.19171 (-0.551491 1.18657)
kT2 [keV] : 40.4327 (-10.4597 28.146)
R2^2/D10^2 : 1.43266E-02 (-0.0107043 0.0221437)
------------------------------------------------------------
# Chi-Squared = 35.53 using 59 PHA bins.
# Reduced chi-squared = 0.6460 for 55 degrees of freedom
# Null hypothesis probability = 9.807915e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.345e-08 7.000e-09
25- 50 6.633e-08 1.914e-08
50-150 2.181e-07 9.829e-08
15-150 3.079e-07 1.216e-07
Plot creation:
Sun Jul 10 20:36:35 EDT 2011