batgrbproduct Analysis for Trigger=507901
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): Thu Nov 17 11:29:03 EST 2011
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger507901/batgroup_hand_proc
======================================================================
Trigger: 00507901 Segment: 000
BAT Trigger Time: 343224829.504 [s; MET]
Trigger Stop: 343224830.016 [s; MET]
UTC: 2011-11-17T12:13:41.921600 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 12.70235957439 Dec: 23.0211326425349 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 12.59
Image Trigger?: NO
Rate S/N Ratio: 28.2665880502051 [ if not an image trigger ]
Image S/N Ratio: 12.59
Flight Position: [ source = BAT ]
RA: 12.70235957439 Dec: 23.0211326425349 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 12.7077845193746 Dec: 23.0030667130116 [deg; J2000]
{ 00h 50m 49.9s , +23d 00' 11.0" }
+/- 1.74440434430117 [arcmin] (estimated 90% radius based on SNR)
+/- 0.804563868077217 [arcmin] (formal 1-sigma fit error)
SNR: 13.7375141262895
Angular difference between Flight and Ground position is 1.124596 arcmin
Partial Coding Fraction: 0.5546875 [ including projection effects ]
Duration
T90: 0.471999943256378 +/- 0.0536656069364681
Measured from: 0.0279999971389771
to: 0.499999940395355 [s; relative to TRIGTIME]
T50: 0.347999930381775 +/- 0.0512249673883452
Measured from: 0.107999980449677
to: 0.455999910831451 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.245999991893768
to: 0.754000008106232 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.0160000324249268
to: 0.519999980926514 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.018032 0.056628 0.070973 0.028743
0.006303 0.007184 0.007530 0.006191 [error]
Peak 0.022024 0.056996 0.072667 0.023607
0.008100 0.008964 0.008843 0.007918 [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 6.52e-09 2.03e-08 5.17e-08 3.76e-07 1.40e-07 4.55e-07 erg/cm2
Error 1.84e-09 3.46e-09 6.60e-09 1.13e-07 1.85e-08 1.15e-07 erg/cm2
Peak flux Power-law 2.27e-01 3.67e-01 4.48e-01 1.07e+00 1.35e+00 2.12e+00 ph/cm2/s
Error 7.76e-02 7.66e-02 6.69e-02 3.59e-01 2.04e-01 3.74e-01 ph/cm2/s
Fluence Cutoff-PL 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 Cutoff-PL 1.73e-01 3.68e-01 4.91e-01 5.64e-01 1.30e+00 1.60e+00 ph/cm2/s
Error 9.77e-02 8.68e-02 8.89e-02 2.13e-01 5.71e-01 0.00e+00 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 0.650 0.220 - - 2.10e-02 2.82e-03 74.800 57
CPL -0.205 0.000 161.0 -51.1 4.64e-02 5.36e-02 72.210 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.712 0.267 - - 1.17e-02 1.85e-03 70.630 57
CPL -0.096 1.185 163.0 0.0 2.45e-02 0.00e+00 68.980 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: 0.448000 sec.
T50 in the 50-300 keV band: 0.320000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 0.536 -0.016 0.520
T90 0.472 0.028 0.500
T50 0.348 0.108 0.456
Peak 1.000 -0.246 0.754
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
12.7078 23.0031 0.0140 24.4417 63.6896 0.1787766 13.738 TRIG_00507901
Foreground time interval of the image:
-0.016 0.520 (delta_t = 0.536 [sec])
Background time interval of the image:
-60.203 -0.016 (delta_t = 60.187 [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 -0.016 sec. to 0.520 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.650270 ( -0.226659 0.213256 )
Norm@50keV : 2.09831E-02 ( -0.00284912 0.00279997 )
------------------------------------------------------------
# Chi-Squared = 74.80 using 59 PHA bins.
# Reduced chi-squared = 1.312 for 57 degrees of freedom
# Null hypothesis probability = 5.699030e-02
Photon flux (15-150 keV) in 0.536 sec: 2.43627 ( -0.309417 0.310346 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.40448e-07 ( -1.84923e-08 1.85894e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.016 sec. to 0.520 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.204541 ( )
Epeak [keV] : 160.955 ( -58.809 -161.064 )
Norm@50keV : 4.64106E-02 ( -0.0263124 0.0808462 )
------------------------------------------------------------
# Chi-Squared = 72.21 using 59 PHA bins.
# Reduced chi-squared = 1.289 for 56 degrees of freedom
# Null hypothesis probability = 7.128867e-02
Photon flux (15-150 keV) in 0.536 sec: 2.36932 ( -0.31839 0.31871 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from -0.016 sec. to 0.520 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.204783 ( -0.35209 0.27381 )
beta : -10.00000 ( 2.66757e+12 2.66757e+12 )
Epeak [keV] : 161.048 ( -58.8622 -161.048 )
Norm@50keV : 4.64276E-02 ( -0.0259861 0.0809301 )
------------------------------------------------------------
# Chi-Squared = 72.21 using 59 PHA bins.
# Reduced chi-squared = 1.313 for 55 degrees of freedom
# Null hypothesis probability = 5.968100e-02
Photon flux (15-150 keV) in 0.536 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] : 27.7880 (-4.41085 5.93147)
R^2/D10^2 : 4.77476E-02 (-0.0201062 0.0313936)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 74.67 using 59 PHA bins.
# Reduced chi-squared = 1.310 for 57 degrees of freedom
# Null hypothesis probability = 5.813386e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.237e-09 9.144e-10
25- 50 1.932e-08 4.494e-09
50-150 1.081e-07 2.265e-08
15-150 1.307e-07 2.554e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 8.98930 ( )
------------------------------------------------------------
# Chi-Squared = 118.90 using 59 PHA bins.
# Reduced chi-squared = 2.0860 for 57 degrees of freedom
# Null hypothesis probability = 2.955165e-06
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.200e-08 6.644e-09
25- 50 2.308e-08 1.259e-08
50-150 5.062e-08 2.806e-08
15-150 8.570e-08 4.677e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 11.0041 (-11.028 -11.0284)
R1^2/D10^2 : 0.232056 (-0.115774 9808.2)
kT2 [keV] : 36.7628 (-35.5262 -36.7889)
R2^2/D10^2 : 1.86749E-02 (-0.00931374 0.0387597)
------------------------------------------------------------
# Chi-Squared = 71.91 using 59 PHA bins.
# Reduced chi-squared = 1.307 for 55 degrees of freedom
# Null hypothesis probability = 6.254127e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.000e-09 2.819e-09
25- 50 2.121e-08 1.123e-08
50-150 1.117e-07 5.899e-08
15-150 1.379e-07 7.153e-08
Peak spectrum fit
Power-law model
Time interval is from -0.246 sec. to 0.754 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.712094 ( -0.276005 0.257347 )
Norm@50keV : 1.16682E-02 ( -0.00186909 0.00183228 )
------------------------------------------------------------
# Chi-Squared = 70.63 using 59 PHA bins.
# Reduced chi-squared = 1.239 for 57 degrees of freedom
# Null hypothesis probability = 1.058967e-01
Photon flux (15-150 keV) in 1 sec: 1.34748 ( -0.203916 0.204919 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.41654e-07 ( -2.20379e-08 2.21896e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.246 sec. to 0.754 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.58428E-02 ( -1.45707 0.913914 )
Epeak [keV] : 163.031 ( )
Norm@50keV : 2.44675E-02 ( )
------------------------------------------------------------
# Chi-Squared = 68.98 using 59 PHA bins.
# Reduced chi-squared = 1.232 for 56 degrees of freedom
# Null hypothesis probability = 1.141814e-01
Photon flux (15-150 keV) in 1 sec: 1.30343 ( -0.21307 0.21324 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from -0.246 sec. to 0.754 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.924207 ( 0.924292 0.924292 )
beta : -0.712077 ( -0.257663 0.275746 )
Epeak [keV] : 15.0799 ( -15.0816 -15.0816 )
Norm@50keV : 1.65648E-02 ( -0.00670622 0 )
------------------------------------------------------------
# Chi-Squared = 70.63 using 59 PHA bins.
# Reduced chi-squared = 1.284 for 55 degrees of freedom
# Null hypothesis probability = 7.618246e-02
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] : 27.3916 (-5.03474 7.13042)
R^2/D10^2 : 2.69178E-02 (-0.0129729 0.0222591)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 70.91 using 59 PHA bins.
# Reduced chi-squared = 1.244 for 57 degrees of freedom
# Null hypothesis probability = 1.018384e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.336e-09 1.069e-09
25- 50 1.978e-08 6.285e-09
50-150 1.080e-07 3.021e-08
15-150 1.311e-07 3.165e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.998 ( )
Norm : 5.19620 (-5.1962 -5.1962)
------------------------------------------------------------
# Chi-Squared = 97.53 using 59 PHA bins.
# Reduced chi-squared = 1.711 for 57 degrees of freedom
# Null hypothesis probability = 6.685379e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.293e-08 7.200e-09
25- 50 2.487e-08 1.388e-08
50-150 5.455e-08 3.021e-08
15-150 9.235e-08 5.145e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.02881 (-8.15065 -8.15065)
R1^2/D10^2 : 0.323419 (-0.321382 1.64367)
kT2 [keV] : 33.1867 (-8.78162 -33.3042)
R2^2/D10^2 : 1.42743E-02 (-0.0142165 0.021979)
------------------------------------------------------------
# Chi-Squared = 68.39 using 59 PHA bins.
# Reduced chi-squared = 1.243 for 55 degrees of freedom
# Null hypothesis probability = 1.060608e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.087e-09 3.584e-09
25- 50 2.145e-08 1.166e-08
50-150 1.117e-07 6.385e-08
15-150 1.392e-07 7.435e-08
Plot creation:
Thu Nov 17 16:11:08 EST 2011