batgrbproduct Analysis for Trigger=510649
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 Dec 29 04:10:55 EST 2011
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger510649/GCN5_download_cron
======================================================================
Trigger: 00510649 Segment: 000
BAT Trigger Time: 346779891.328 [s; MET]
Trigger Stop: 346779895.424 [s; MET]
UTC: 2011-12-28T15:44:43.604140 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 150.079150215553 Dec: 18.2930458291051 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.28
Image Trigger?: NO
Rate S/N Ratio: 16.8226038412607 [ if not an image trigger ]
Image S/N Ratio: 11.28
Flight Position: [ source = BAT ]
RA: 150.079150215553 Dec: 18.2930458291051 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 150.062553268135 Dec: 18.2839542581659 [deg; J2000]
{ 10h 00m 15.0s , +18d 17' 02.2" }
+/- 1.37296003756954 [arcmin] (estimated 90% radius based on SNR)
+/- 0.498273747238972 [arcmin] (formal 1-sigma fit error)
SNR: 19.3403461220635
Angular difference between Flight and Ground position is 1.091589 arcmin
Partial Coding Fraction: 0.3984375 [ including projection effects ]
Duration
T90: 101.215999960899 +/- 5.41590248878418
Measured from: 0.864000082015991
to: 102.080000042915 [s; relative to TRIGTIME]
T50: 47.095999956131 +/- 0.630174599234471
Measured from: 47.5480000972748
to: 94.6440000534058 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 54.555999994278
to: 55.555999994278 [s; relative to TRIGTIME]
Total Fluence
Measured from: -12.8199999928474
to: 115.427999973297 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 6.771630 5.900876 2.947610 0.449113
0.106472 0.107639 0.094893 0.083938 [error]
Peak 0.414626 0.528740 0.345550 0.062266
0.016236 0.017633 0.014881 0.010121 [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 2.38e-06 2.75e-06 2.28e-06 3.17e-06 8.55e-06 1.06e-05 erg/cm2
Error 1.22e-07 7.72e-08 1.01e-07 3.08e-07 2.35e-07 3.83e-07 erg/cm2
Peak flux Power-law 5.09e+00 4.18e+00 2.32e+00 1.90e+00 1.24e+01 1.35e+01 ph/cm2/s
Error 3.64e-01 1.80e-01 1.27e-01 2.12e-01 5.45e-01 5.50e-01 ph/cm2/s
Fluence Cutoff-PL 2.35e-06 2.76e-06 2.28e-06 2.85e-06 8.49e-06 1.02e-05 erg/cm2
Error 1.55e-07 8.56e-08 1.03e-07 7.09e-07 2.91e-07 8.02e-07 erg/cm2
Peak flux Cutoff-PL 4.90e+00 4.24e+00 2.36e+00 1.52e+00 1.23e+01 1.30e+01 ph/cm2/s
Error 4.45e-01 2.04e-01 1.38e-01 5.66e-01 5.82e-01 7.96e-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 2.271 0.061 - - 7.01e-03 2.17e-04 59.010 57
CPL 1.989 0.000 1.9 7.2 9.60e-03 5.22e-04 60.840 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.847 0.075 - - 8.86e-02 3.76e-03 52.570 57
CPL 1.650 0.272 88.7 -29.7 1.11e-01 3.48e-02 51.130 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: 96.704000 sec.
T50 in the 50-300 keV band: 10.880000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 128.248 -12.820 115.428
T90 101.216 0.864 102.080
T50 47.096 47.548 94.644
Peak 1.000 54.556 55.556
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
150.0626 +18.2840 0.0099 41.3 13.0 3.2773 19.3 TRIG_00510649
------------------------------------------
Foreground time interval of the image:
-12.820 40.173 (delta_t = 52.993 [sec])
Background time interval of the image:
-239.328 -122.438 (delta_t = 116.890 [sec])
-119.328 -12.820 (delta_t = 106.508 [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 -12.820 sec. to 115.428 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.27137 ( -0.0608123 0.0616169 )
Norm@50keV : 7.01454E-03 ( -0.000217586 0.000216317 )
------------------------------------------------------------
# Chi-Squared = 59.01 using 59 PHA bins.
# Reduced chi-squared = 1.035 for 57 degrees of freedom
# Null hypothesis probability = 4.019682e-01
Photon flux (15-150 keV) in 128.2 sec: 1.20663 ( -0.0396666 0.0400195 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.5498e-06 ( -2.35092e-07 2.35328e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -12.820 sec. to 115.428 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.98915 ( )
Epeak [keV] : 1.93930 ( -0.377763 14.0543 )
Norm@50keV : 9.60038E-03 ( -0.000414084 0.000629541 )
------------------------------------------------------------
# Chi-Squared = 60.84 using 59 PHA bins.
# Reduced chi-squared = 1.086 for 56 degrees of freedom
# Null hypothesis probability = 3.059490e-01
Photon flux (15-150 keV) in 128.2 sec: 1.19739 ( -0.04853 0.04644 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.49367e-06 ( -3.01706e-07 2.7954e-07 ) ergs/cm2
Band function
Time interval is from -12.820 sec. to 115.428 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -2.00817 ( 2.00817 0.0190586 )
beta : -2.27138 ( -0.0616076 0.0608231 )
Epeak [keV] : 32.3210 ( -32.321 -32.321 )
Norm@50keV : 0.953371 ( -0.0274455 0.0274618 )
------------------------------------------------------------
# Chi-Squared = 59.01 using 59 PHA bins.
# Reduced chi-squared = 1.073 for 55 degrees of freedom
# Null hypothesis probability = 3.312274e-01
Photon flux (15-150 keV) in 128.2 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] : 10.8442 ( )
R^2/D10^2 : 0.342419 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 379.38 using 59 PHA bins.
# Reduced chi-squared = 6.6558 for 57 degrees of freedom
# Null hypothesis probability = 3.751171e-49
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.075e-06 5.846e-08
25- 50 2.985e-06 9.487e-08
50-150 1.961e-06 1.231e-07
15-150 6.022e-06 1.756e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 55.7656 (-4.36731 4.92404)
Norm : 6.02829 (-0.355577 0.309997)
------------------------------------------------------------
# Chi-Squared = 89.53 using 59 PHA bins.
# Reduced chi-squared = 1.571 for 57 degrees of freedom
# Null hypothesis probability = 3.838115e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.917e-06 9.359e-08
25- 50 2.851e-06 9.294e-08
50-150 3.048e-06 1.782e-07
15-150 7.817e-06 2.109e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.19217 (-0.478186 0.523868)
R1^2/D10^2 : 5.32291 (-1.80988 2.98736)
kT2 [keV] : 18.2041 (-1.45744 1.77768)
R2^2/D10^2 : 3.32517E-02 (-0.0108166 0.0142686)
------------------------------------------------------------
# Chi-Squared = 70.08 using 59 PHA bins.
# Reduced chi-squared = 1.274 for 55 degrees of freedom
# Null hypothesis probability = 8.276998e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.207e-06 2.474e-07
25- 50 2.693e-06 1.718e-07
50-150 3.238e-06 2.577e-07
15-150 8.137e-06 4.551e-07
Peak spectrum fit
Power-law model
Time interval is from 54.556 sec. to 55.556 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.84717 ( -0.0745653 0.0753722 )
Norm@50keV : 8.85555E-02 ( -0.0037688 0.00375444 )
------------------------------------------------------------
# Chi-Squared = 52.57 using 59 PHA bins.
# Reduced chi-squared = 0.9223 for 57 degrees of freedom
# Null hypothesis probability = 6.418252e-01
Photon flux (15-150 keV) in 1 sec: 12.4331 ( -0.543866 0.545497 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.14284e-07 ( -3.48357e-08 3.49114e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 54.556 sec. to 55.556 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.64989 ( -0.296653 0.246506 )
Epeak [keV] : 88.6601 ( -29.3403 -88.6602 )
Norm@50keV : 0.111302 ( -0.025245 0.0444169 )
------------------------------------------------------------
# Chi-Squared = 51.13 using 59 PHA bins.
# Reduced chi-squared = 0.9130 for 56 degrees of freedom
# Null hypothesis probability = 6.595012e-01
Photon flux (15-150 keV) in 1 sec: 12.2803 ( -0.5812 0.583 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.03583e-07 ( -3.8364e-08 3.8183e-08 ) ergs/cm2
Band function
Time interval is from 54.556 sec. to 55.556 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.548828 ( -0.776583 5.56057 )
beta : -1.93644 ( -0.146836 0.113678 )
Epeak [keV] : 35.4348 ( -19.432 111.606 )
Norm@50keV : 0.620774 ( -0.617141 9401.34 )
------------------------------------------------------------
# Chi-Squared = 48.95 using 59 PHA bins.
# Reduced chi-squared = 0.8901 for 55 degrees of freedom
# Null hypothesis probability = 7.036299e-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] : 12.7369 ( )
R^2/D10^2 : 2.27326 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 214.57 using 59 PHA bins.
# Reduced chi-squared = 3.7644 for 57 degrees of freedom
# Null hypothesis probability = 4.120220e-20
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.822e-08 6.315e-09
25- 50 2.634e-07 1.360e-08
50-150 2.669e-07 2.070e-08
15-150 6.086e-07 2.605e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 104.209 (-11.2327 22.3431)
Norm : 53.3491 (-3.15047 3.69229)
------------------------------------------------------------
# Chi-Squared = 54.82 using 59 PHA bins.
# Reduced chi-squared = 0.9617 for 57 degrees of freedom
# Null hypothesis probability = 5.573268e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.394e-07 8.100e-09
25- 50 2.431e-07 1.065e-08
50-150 4.031e-07 4.380e-08
15-150 7.855e-07 5.110e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.77196 (-0.737505 0.785248)
R1^2/D10^2 : 17.4844 (-5.67708 9.31967)
kT2 [keV] : 25.0087 (-3.12403 4.32489)
R2^2/D10^2 : 0.136781 (-0.0613935 0.0932943)
------------------------------------------------------------
# Chi-Squared = 49.87 using 59 PHA bins.
# Reduced chi-squared = 0.9067 for 55 degrees of freedom
# Null hypothesis probability = 6.703970e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.392e-07 1.830e-08
25- 50 2.438e-07 2.280e-08
50-150 4.144e-07 6.535e-08
15-150 7.974e-07 8.560e-08
Plot creation:
Thu Dec 29 04:25:38 EST 2011