batgrbproduct Analysis for Trigger=456014
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): Tue Jul 5 10:47:31 EDT 2011
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger456014/batgroup_hand_proc
======================================================================
Trigger: 00456014 Segment: 000
BAT Trigger Time: 330653174.72 [s; MET]
Trigger Stop: 330653178.816 [s; MET]
UTC: 2011-06-25T00:06:07.629580 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 282.550970337691 Dec: -0.968196446949389 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.53
Image Trigger?: NO
Rate S/N Ratio: 8.54400374531753 [ if not an image trigger ]
Image S/N Ratio: 7.53
Flight Position: [ source = BAT ]
RA: 282.550970337691 Dec: -0.968196446949389 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 282.497666117717 Dec: -0.958557538912312 [deg; J2000]
{ 18h 49m 59.4s , -00d 57' 30.8" }
+/- 3.65931734736496 [arcmin] (estimated 90% radius based on SNR)
+/- 2.46499219219371 [arcmin] (formal 1-sigma fit error)
SNR: 4.76717539322832
Angular difference between Flight and Ground position is 3.249677 arcmin
Partial Coding Fraction: 0.421875 [ including projection effects ]
Duration
T90: 13 +/- 3.60555127546399
Measured from: -0.720000028610229
to: 12.2799999713898 [s; relative to TRIGTIME]
T50: 6 +/- 4.47213595499958
Measured from: 1.27999997138977
to: 7.27999997138977 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 4.27999997138977
to: 5.27999997138977 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.72000002861023
to: 13.2799999713898 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.368752 0.077975 -0.044919 0.001017
0.037772 0.034787 0.029691 0.025796 [error]
Peak 0.043049 0.016472 0.005351 -0.009630
0.010283 0.009173 0.007349 0.006977 [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 1.20e-07 3.00e-08 3.92e-09 5.74e-10 1.54e-07 1.55e-07 erg/cm2
Error 2.20e-08 1.51e-08 5.06e-09 1.34e-09 3.48e-08 3.51e-08 erg/cm2
Peak flux Power-law 5.73e-01 1.29e-01 1.48e-02 1.88e-03 7.18e-01 7.18e-01 ph/cm2/s
Error 1.74e-01 9.45e-02 2.73e-02 8.36e-03 2.36e-01 2.36e-01 ph/cm2/s
Fluence Cutoff-PL 1.24e-07 2.52e-08 7.05e-10 1.45e-12 1.50e-07 1.51e-07 erg/cm2
Error 2.40e-08 2.08e-08 4.55e-09 2.36e-10 2.86e-08 3.38e-08 erg/cm2
Peak flux Cutoff-PL 5.72e-01 1.29e-01 1.48e-02 1.86e-03 7.17e-01 7.18e-01 ph/cm2/s
Error 1.73e-01 9.45e-02 2.73e-02 8.22e-03 1.89e-01 2.36e-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 4.936 0.852 - - 2.20e-04 1.97e-04 48.460 57
CPL 1.000 0.000 50.0 0.0 3.41e-03 0.00e+00 110.240 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 4.124 1.504 - - 1.04e-03 1.47e-03 60.830 57
CPL 1.794 0.000 1.9 0.0 8.23e-02 0.00e+00 61.800 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 15.000 -1.720 13.280
T90 13.000 -0.720 12.280
T50 6.000 1.280 7.280
Peak 1.000 4.280 5.280
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
282.4977 -0.9586 0.0405 27.2536 86.3896 0.3142498 4.767 TRIG_00456014
Foreground time interval of the image:
-1.720 13.280 (delta_t = 15.000 [sec])
Background time interval of the image:
-177.419 -1.720 (delta_t = 175.699 [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 -1.720 sec. to 13.280 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.93606 ( -0.766186 0.93768 )
Norm@50keV : 2.20228E-04 ( -0.000141234 0.000252233 )
------------------------------------------------------------
# Chi-Squared = 48.46 using 59 PHA bins.
# Reduced chi-squared = 0.8501 for 57 degrees of freedom
# Null hypothesis probability = 7.824889e-01
Photon flux (15-150 keV) in 15 sec: 0.319747 ( -0.0614565 0.0616905 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.54353e-07 ( -3.37809e-08 3.58517e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.720 sec. to 13.280 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 3.40749E-03 ( )
------------------------------------------------------------
# Chi-Squared = 110.24 using 59 PHA bins.
# Reduced chi-squared = 1.9686 for 56 degrees of freedom
# Null hypothesis probability = 2.085796e-05
Photon flux (15-150 keV) in 15 sec: 0.320339 ( -0.060245 0.0606 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.49984e-07 ( -3.17964e-08 2.54907e-08 ) ergs/cm2
Band function
Time interval is from -1.720 sec. to 13.280 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -7.37187 ( 1.64499 4.49434 )
beta : -4.93604 ( -0.93682 0.766373 )
Epeak [keV] : 15.8435 ( -15.8435 -15.8435 )
Norm@50keV : 2.99327E-02 ( -0.0191955 0.0342822 )
------------------------------------------------------------
# Chi-Squared = 48.46 using 59 PHA bins.
# Reduced chi-squared = 0.8810 for 55 degrees of freedom
# Null hypothesis probability = 7.211024e-01
Photon flux (15-150 keV) in 15 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] : 2.77783 (-0.480195 0.612642)
R^2/D10^2 : 75.2125 (-75.2151 205.969)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 48.51 using 59 PHA bins.
# Reduced chi-squared = 0.8511 for 57 degrees of freedom
# Null hypothesis probability = 7.807325e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.287e-07 7.117e-08
25- 50 1.422e-08 9.270e-09
50-150 1.196e-11 1.334e-11
15-150 1.429e-07 7.905e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 5.73963 (-1.53969 2.37737)
Norm : 46.2534 (-28.6265 90.4383)
------------------------------------------------------------
# Chi-Squared = 47.95 using 59 PHA bins.
# Reduced chi-squared = 0.8413 for 57 degrees of freedom
# Null hypothesis probability = 7.977216e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.260e-07 6.995e-08
25- 50 2.143e-08 1.329e-08
50-150 2.132e-10 2.415e-10
15-150 1.476e-07 7.445e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.50062 (-3.03408 -3.03408)
R1^2/D10^2 : 0.497294 ( )
kT2 [keV] : 2.33663 (-2.31306 0.880302)
R2^2/D10^2 : 194.792 (-212.272 22620.8)
------------------------------------------------------------
# Chi-Squared = 48.40 using 59 PHA bins.
# Chi-Squared = 47.19 using 59 PHA bins.
# Reduced chi-squared = 0.8800 for 55 degrees of freedom
# Reduced chi-squared = 0.8579 for 55 degrees of freedom
# Null hypothesis probability = 7.230602e-01
# Null hypothesis probability = 7.639973e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.283e-07 4.766e-03
25- 50 1.539e-08 4.416e-02
50-150 2.099e-11 6.332e-01
15-150 1.437e-07 4.801e-01
Peak spectrum fit
Power-law model
Time interval is from 4.280 sec. to 5.280 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.12353 ( -1.14939 1.85901 )
Norm@50keV : 1.04406E-03 ( -0.00104407 0.00189486 )
------------------------------------------------------------
# Chi-Squared = 60.83 using 59 PHA bins.
# Reduced chi-squared = 1.067 for 57 degrees of freedom
# Null hypothesis probability = 3.396295e-01
Photon flux (15-150 keV) in 1 sec: 0.717726 ( -0.236353 0.234922 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.51973e-08 ( -1.01601e-08 1.21931e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 4.280 sec. to 5.280 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.79450 ( )
Epeak [keV] : 1.88491 ( )
Norm@50keV : 8.23416E-02 ( )
------------------------------------------------------------
# Chi-Squared = 61.80 using 59 PHA bins.
# Reduced chi-squared = 1.104 for 56 degrees of freedom
# Null hypothesis probability = 2.767190e-01
Photon flux (15-150 keV) in 1 sec: 0.717218 ( -0.118523 0.25955 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.51779e-08 ( -1.01465e-08 1.22071e-08 ) ergs/cm2
Band function
Time interval is from 4.280 sec. to 5.280 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -7.85373 ( 0.745342 4.91324 )
beta : -4.12354 ( -1.86248 1.14975 )
Epeak [keV] : 32.4689 ( -32.4689 -32.4689 )
Norm@50keV : 0.141901 ( -0.141901 0.25754 )
------------------------------------------------------------
# Chi-Squared = 60.83 using 59 PHA bins.
# Reduced chi-squared = 1.106 for 55 degrees of freedom
# Null hypothesis probability = 2.739931e-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] : 2.99598 (-1.01147 1.71349)
R^2/D10^2 : 94.4997 (-94.9859 1519.14)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 62.90 using 59 PHA bins.
# Reduced chi-squared = 1.103 for 57 degrees of freedom
# Null hypothesis probability = 2.754588e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.752e-08 9.920e-09
25- 50 2.541e-09 1.657e-09
50-150 4.050e-12 5.755e-12
15-150 2.007e-08 1.200e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.46594 (-3.82994 10.2364)
Norm : 46.8827 (-46.6043 413.611)
------------------------------------------------------------
# Chi-Squared = 61.95 using 59 PHA bins.
# Reduced chi-squared = 1.087 for 57 degrees of freedom
# Null hypothesis probability = 3.040044e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.733e-08 1.019e-08
25- 50 4.806e-09 3.133e-09
50-150 1.341e-10 1.623e-10
15-150 2.227e-08 1.315e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.26243 (-2.20943 1.57129)
R1^2/D10^2 : 496.554 (-312.874 1.37386e+07)
kT2 [keV] : 9.13557 (-8.15271 -8.72378)
R2^2/D10^2 : 0.201984 (-0.253825 92.6399)
------------------------------------------------------------
# Chi-Squared = 60.15 using 59 PHA bins.
# Reduced chi-squared = 1.094 for 55 degrees of freedom
# Null hypothesis probability = 2.948181e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.608e-08 8.570e-09
25- 50 7.810e-09 4.423e-09
50-150 2.872e-09 3.037e-09
15-150 2.676e-08 1.342e-08
Plot creation:
Tue Jul 5 11:23:50 EDT 2011