batgrbproduct Analysis for Trigger=509419
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 Dec 11 07:02:33 EST 2011
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger509419/GCN5_download_cron
======================================================================
Trigger: 00509419 Segment: 000
BAT Trigger Time: 345220630.848 [s; MET]
Trigger Stop: 345220631.104 [s; MET]
UTC: 2011-12-10T14:37:03.186460 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 191.488500995888 Dec: -7.16720076662529 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.85
Image Trigger?: NO
Rate S/N Ratio: 30.9030742807249 [ if not an image trigger ]
Image S/N Ratio: 10.85
Flight Position: [ source = BAT ]
RA: 191.488500995888 Dec: -7.16720076662529 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 191.494304236646 Dec: -7.17526447772318 [deg; J2000]
{ 12h 45m 58.6s , -07d 10' 31.0" }
+/- 1.70282441256696 [arcmin] (estimated 90% radius based on SNR)
+/- 0.671605492886698 [arcmin] (formal 1-sigma fit error)
SNR: 14.2192179698565
Angular difference between Flight and Ground position is 0.594503 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 2.51599991321564 +/- 0.132060610640776
Measured from: -2.22399985790253
to: 0.29200005531311 [s; relative to TRIGTIME]
T50: 2.1159999370575 +/- 0.0865332737249088
Measured from: -1.99599987268448
to: 0.120000064373016 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -2.3299999833107
to: -1.3299999833107 [s; relative to TRIGTIME]
Total Fluence
Measured from: -2.32800000905991
to: 0.360000014305115 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.067687 0.093807 0.079657 0.022695
0.009297 0.010056 0.008893 0.007543 [error]
Peak 0.030803 0.051576 0.044247 0.011774
0.005886 0.006429 0.005642 0.004648 [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 1.75e-08 3.65e-08 5.93e-08 2.17e-07 1.64e-07 3.31e-07 erg/cm2
Error 3.42e-09 4.32e-09 8.47e-09 6.80e-08 2.11e-08 7.42e-08 erg/cm2
Peak flux Power-law 2.78e-01 3.28e-01 2.78e-01 4.00e-01 1.03e+00 1.28e+00 ph/cm2/s
Error 6.75e-02 4.92e-02 4.46e-02 1.34e-01 1.39e-01 1.84e-01 ph/cm2/s
Fluence Cutoff-PL 1.68e-08 3.75e-08 6.05e-08 1.44e-07 1.61e-07 2.59e-07 erg/cm2
Error 3.96e-09 5.22e-09 9.19e-09 1.42e-07 2.32e-08 1.19e-07 erg/cm2
Peak flux Cutoff-PL 2.40e-01 3.49e-01 2.96e-01 9.96e-01 1.07e+00 0.00e+00 ph/cm2/s
Error 8.13e-02 6.00e-02 5.26e-02 1.46e-01 1.81e-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 1.297 0.194 - - 6.17e-03 6.90e-04 61.060 57
CPL 1.035 0.632 186.7 0.0 8.36e-03 8.25e-03 60.680 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.237 0.228 - - 8.70e-03 1.17e-03 68.400 57
CPL 0.485 1.069 103.6 -33.2 2.04e-02 3.85e-02 66.770 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: 2.496000 sec.
T50 in the 50-300 keV band: 2.176000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 2.688 -2.328 0.360
T90 2.516 -2.224 0.292
T50 2.116 -1.996 0.120
Peak 1.000 -2.330 -1.330
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
191.4943 -7.1753 0.0135 10.1 -48.2 0.2633 14.2 TRIG_00509419
------------------------------------------
Foreground time interval of the image:
-2.328 0.360 (delta_t = 2.688 [sec])
Background time interval of the image:
-239.848 -2.328 (delta_t = 237.520 [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 -2.328 sec. to 0.360 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.29694 ( -0.194336 0.193906 )
Norm@50keV : 6.17151E-03 ( -0.000691537 0.000689365 )
------------------------------------------------------------
# Chi-Squared = 61.06 using 59 PHA bins.
# Reduced chi-squared = 1.071 for 57 degrees of freedom
# Null hypothesis probability = 3.321104e-01
Photon flux (15-150 keV) in 2.688 sec: 0.735863 ( -0.0820729 0.0821321 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.6405e-07 ( -2.09201e-08 2.11936e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -2.328 sec. to 0.360 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.03472 ( -0.83262 0.431342 )
Epeak [keV] : 186.721 ( -186.721 -186.721 )
Norm@50keV : 8.36010E-03 ( -0.0035391 0.0129643 )
------------------------------------------------------------
# Chi-Squared = 60.68 using 59 PHA bins.
# Reduced chi-squared = 1.084 for 56 degrees of freedom
# Null hypothesis probability = 3.108391e-01
Photon flux (15-150 keV) in 2.688 sec: 0.727911 ( -0.085132 0.084847 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.60645e-07 ( -2.33162e-08 2.303e-08 ) ergs/cm2
Band function
Time interval is from -2.328 sec. to 0.360 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.772164 ( 0.860894 3.99029 )
beta : -1.43478 ( 1.42624 0.305361 )
Epeak [keV] : 96.3626 ( -94.6429 -94.6429 )
Norm@50keV : 1.22519E-02 ( -0.00686418 0 )
------------------------------------------------------------
# Chi-Squared = 60.57 using 59 PHA bins.
# Reduced chi-squared = 1.101 for 55 degrees of freedom
# Null hypothesis probability = 2.819929e-01
Photon flux (15-150 keV) in 2.688 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] : 16.4797 (-2.3509 2.86661)
R^2/D10^2 : 6.26641E-02 (-0.0261129 0.0429402)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 76.97 using 59 PHA bins.
# Reduced chi-squared = 1.350 for 57 degrees of freedom
# Null hypothesis probability = 4.017133e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.393e-09 1.904e-09
25- 50 4.052e-08 6.599e-09
50-150 7.776e-08 1.994e-08
15-150 1.277e-07 2.047e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.997 ( )
Norm : 3.01421 (-3.01421 -3.01421)
------------------------------------------------------------
# Chi-Squared = 65.09 using 59 PHA bins.
# Reduced chi-squared = 1.142 for 57 degrees of freedom
# Null hypothesis probability = 2.157687e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.018e-08 1.086e-08
25- 50 3.881e-08 2.109e-08
50-150 8.512e-08 4.572e-08
15-150 1.441e-07 7.706e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.22881 (-3.46761 3.68944)
R1^2/D10^2 : 0.402411 (-0.261079 1.97979)
kT2 [keV] : 31.7049 (-11.0524 65.3049)
R2^2/D10^2 : 5.59895E-03 (-0.00525041 0.0119531)
------------------------------------------------------------
# Chi-Squared = 61.08 using 59 PHA bins.
# Reduced chi-squared = 1.111 for 55 degrees of freedom
# Null hypothesis probability = 2.666418e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.580e-08 8.375e-09
25- 50 3.924e-08 1.895e-08
50-150 1.071e-07 5.837e-08
15-150 1.622e-07 8.293e-08
Peak spectrum fit
Power-law model
Time interval is from -2.330 sec. to -1.330 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.23653 ( -0.229425 0.227388 )
Norm@50keV : 8.69624E-03 ( -0.00116995 0.00116703 )
------------------------------------------------------------
# Chi-Squared = 68.40 using 59 PHA bins.
# Reduced chi-squared = 1.200 for 57 degrees of freedom
# Null hypothesis probability = 1.432782e-01
Photon flux (15-150 keV) in 1 sec: 1.02632 ( -0.139139 0.139309 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.73435e-08 ( -1.32109e-08 1.33884e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -2.330 sec. to -1.330 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.484925 ( -1.28726 0.849734 )
Epeak [keV] : 103.645 ( -37.1741 -103.635 )
Norm@50keV : 2.04183E-02 ( -0.012411 0.0646248 )
------------------------------------------------------------
# Chi-Squared = 66.77 using 59 PHA bins.
# Reduced chi-squared = 1.192 for 56 degrees of freedom
# Null hypothesis probability = 1.536764e-01
Photon flux (15-150 keV) in 1 sec: 0.995643 ( -0.146884 0.145687 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from -2.330 sec. to -1.330 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.241976 ( 0.225015 0.225015 )
beta : -1.73804 ( 1.74361 0.58532 )
Epeak [keV] : 84.5426 ( -81.1466 312.631 )
Norm@50keV : 2.82213E-02 ( -0.0309064 111.466 )
------------------------------------------------------------
# Chi-Squared = 66.50 using 59 PHA bins.
# Reduced chi-squared = 1.209 for 55 degrees of freedom
# Null hypothesis probability = 1.376148e-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] : 16.9487 (-2.53342 3.19842)
R^2/D10^2 : 8.25494E-02 (-0.0364545 0.060374)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 72.09 using 59 PHA bins.
# Reduced chi-squared = 1.265 for 57 degrees of freedom
# Null hypothesis probability = 8.599444e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.833e-09 1.269e-09
25- 50 2.133e-08 4.715e-09
50-150 4.371e-08 1.145e-08
15-150 6.988e-08 1.478e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.998 ( )
Norm : 4.21151 (-4.21151 -4.21151)
------------------------------------------------------------
# Chi-Squared = 72.43 using 59 PHA bins.
# Reduced chi-squared = 1.271 for 57 degrees of freedom
# Null hypothesis probability = 8.177361e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.049e-08 5.685e-09
25- 50 2.017e-08 1.100e-08
50-150 4.424e-08 2.388e-08
15-150 7.490e-08 4.052e-08
Double BB
R1^2/D10^2 : 0.210978 ( )
kT2 [keV] : 40.2459 (-41.1114 -41.4482)
R2^2/D10^2 : 3.03919E-03 (-0.00257425 0.0845421)
------------------------------------------------------------
# Chi-Squared = 67.59 using 59 PHA bins.
# Chi-Squared = 67.01 using 59 PHA bins.
# Chi-Squared = 66.99 using 59 PHA bins.
# Reduced chi-squared = 1.229 for 55 degrees of freedom
# Reduced chi-squared = 1.218 for 55 degrees of freedom
# Reduced chi-squared = 1.218 for 55 degrees of freedom
# Null hypothesis probability = 1.186171e-01
# Null hypothesis probability = 1.284409e-01
# Null hypothesis probability = 1.288521e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.271e-09 1.964e-09
25- 50 1.981e-08 4.785e-09
50-150 4.641e-08 1.218e-08
15-150 7.249e-08 1.363e-08
Plot creation:
Sun Dec 11 07:25:34 EST 2011