batgrbproduct Analysis for Trigger=530267
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): Wed Aug 8 01:53:05 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger530267/GCN5_download_cron
======================================================================
Trigger: 00530267 Segment: 000
BAT Trigger Time: 366016187.264 [s; MET]
Trigger Stop: 366016188.288 [s; MET]
UTC: 2012-08-07T07:09:37.753700 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 241.210902101014 Dec: -47.4899662888597 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.03
Image Trigger?: NO
Rate S/N Ratio: 10.3923048454133 [ if not an image trigger ]
Image S/N Ratio: 7.03
Flight Position: [ source = BAT ]
RA: 241.210902101014 Dec: -47.4899662888597 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 241.293304603868 Dec: -47.4607551175174 [deg; J2000]
{ 16h 05m 10.4s , -47d 27' 38.7" }
+/- 1.91883134365275 [arcmin] (estimated 90% radius based on SNR)
+/- 0.980831540704597 [arcmin] (formal 1-sigma fit error)
SNR: 11.988920728706
Angular difference between Flight and Ground position is 3.773512 arcmin
Partial Coding Fraction: 0.890625 [ including projection effects ]
Duration
T90: 20.592000067234 +/- 5.74774249448075
Measured from: 0.144000113010406
to: 20.7360001802444 [s; relative to TRIGTIME]
T50: 7.64800006151199 +/- 5.37847562986851
Measured from: 1.4400001168251
to: 9.0880001783371 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.708000004291534
to: 1.70800000429153 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.272000014781952
to: 23.3920000195503 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.221801 0.178426 0.131601 0.038188
0.031497 0.026517 0.022165 0.019191 [error]
Peak 0.034248 0.046727 0.020691 -0.000719
0.006861 0.005868 0.004808 0.004051 [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 5.55e-08 8.29e-08 9.27e-08 1.96e-07 2.90e-07 4.27e-07 erg/cm2
Error 1.35e-08 1.24e-08 2.25e-08 1.02e-07 5.09e-08 1.21e-07 erg/cm2
Peak flux Power-law 3.76e-01 2.86e-01 1.45e-01 1.06e-01 8.56e-01 9.13e-01 ph/cm2/s
Error 8.95e-02 4.79e-02 3.72e-02 5.12e-02 1.45e-01 1.53e-01 ph/cm2/s
Fluence Cutoff-PL 5.58e-08 8.30e-08 9.23e-08 1.94e-07 4.26e-07 0.00e+00 erg/cm2
Error 1.35e-08 1.24e-08 2.25e-08 1.57e-07 1.18e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 3.01e-01 3.54e-01 1.33e-01 1.08e-02 7.97e-01 7.98e-01 ph/cm2/s
Error 1.02e-01 6.87e-02 5.11e-02 2.47e-02 1.47e-01 1.48e-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 3.05e-01 3.52e-01 1.34e-01 8.07e-01 8.03e-01 0.00e+00 ph/cm2/s
Error 9.61e-02 6.83e-02 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 1.839 0.302 - - 1.33e-03 2.31e-04 44.890 57
CPL 1.841 0.000 9966.4 0.0 1.33e-03 0.00e+00 44.890 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.976 0.289 - - 5.77e-03 1.15e-03 70.630 57
CPL -0.233 1.912 41.2 10.3 1.10e-01 1.37e+00 63.260 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 23.664 -0.272 23.392
T90 20.592 0.144 20.736
T50 7.648 1.440 9.088
Peak 1.000 0.708 1.708
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
241.2933 -47.4608 0.0160 19.5 149.1 0.4688 12.0 TRIG_00530267
------------------------------------------
Foreground time interval of the image:
-0.272 11.537 (delta_t = 11.809 [sec])
Background time interval of the image:
-239.264 -18.294 (delta_t = 220.970 [sec])
-17.264 -0.272 (delta_t = 16.992 [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 -0.272 sec. to 23.392 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.83930 ( -0.294877 0.308418 )
Norm@50keV : 1.33405E-03 ( -0.000235116 0.000226787 )
------------------------------------------------------------
# Chi-Squared = 44.89 using 59 PHA bins.
# Reduced chi-squared = 0.7875 for 57 degrees of freedom
# Null hypothesis probability = 8.775696e-01
Photon flux (15-150 keV) in 23.66 sec: 0.186705 ( -0.0282965 0.0284287 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.9027e-07 ( -5.02167e-08 5.15085e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.272 sec. to 23.392 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.84132 ( )
Epeak [keV] : 9966.41 ( )
Norm@50keV : 1.33498E-03 ( )
------------------------------------------------------------
# Chi-Squared = 44.89 using 59 PHA bins.
# Reduced chi-squared = 0.8016 for 56 degrees of freedom
# Null hypothesis probability = 8.564614e-01
Photon flux (15-150 keV) in 23.66 sec: 0.186656 ( -0.027707 0.028362 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.25504e-07 ( -1.06408e-07 1.29458e-07 ) ergs/cm2
Band function
Time interval is from -0.272 sec. to 23.392 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.39299 ( 1.38488 1.38488 )
beta : -1.84218 ( 1.8423 0.297421 )
Epeak [keV] : 26.6122 ( -26.8346 -26.8346 )
Norm@50keV : 3.17618E-03 ( -0.00330737 323257 )
------------------------------------------------------------
# Chi-Squared = 44.88 using 59 PHA bins.
# Reduced chi-squared = 0.8160 for 55 degrees of freedom
# Null hypothesis probability = 8.331090e-01
Photon flux (15-150 keV) in 23.66 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] : 10.7476 (-2.3008 3.27731)
R^2/D10^2 : 6.25706E-02 (-0.0618769 0.0948454)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 62.91 using 59 PHA bins.
# Reduced chi-squared = 1.104 for 57 degrees of freedom
# Null hypothesis probability = 2.749602e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.555e-08 1.096e-08
25- 50 9.754e-08 2.858e-08
50-150 6.249e-08 2.357e-08
15-150 1.956e-07 4.610e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 102.614 (-43.6954 -100.041)
Norm : 0.803442 (-0.159858 0.237735)
------------------------------------------------------------
# Chi-Squared = 46.66 using 59 PHA bins.
# Reduced chi-squared = 0.8186 for 57 degrees of freedom
# Null hypothesis probability = 8.341240e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.969e-08 1.047e-08
25- 50 8.635e-08 1.666e-08
50-150 1.420e-07 3.075e-08
15-150 2.780e-07 4.909e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.82492 (-1.68594 2.08027)
R1^2/D10^2 : 0.519976 (-0.359852 1.64276)
kT2 [keV] : 27.9755 (-10.0056 33.0052)
R2^2/D10^2 : 1.59866E-03 (-0.00141968 0.00533286)
------------------------------------------------------------
# Chi-Squared = 43.87 using 59 PHA bins.
# Reduced chi-squared = 0.7977 for 55 degrees of freedom
# Null hypothesis probability = 8.594095e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.792e-08 3.320e-08
25- 50 7.851e-08 4.171e-08
50-150 1.677e-07 9.391e-08
15-150 3.041e-07 1.625e-07
Peak spectrum fit
Power-law model
Time interval is from 0.708 sec. to 1.708 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.97568 ( -0.279792 0.297884 )
Norm@50keV : 5.76980E-03 ( -0.00115858 0.00113793 )
------------------------------------------------------------
# Chi-Squared = 70.63 using 59 PHA bins.
# Reduced chi-squared = 1.239 for 57 degrees of freedom
# Null hypothesis probability = 1.059545e-01
Photon flux (15-150 keV) in 1 sec: 0.855969 ( -0.144581 0.14483 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.31387e-08 ( -1.0074e-08 1.03781e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.708 sec. to 1.708 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.233364 ( -2.30785 1.51569 )
Epeak [keV] : 41.1694 ( -8.14543 12.5331 )
Norm@50keV : 0.109607 ( -0.11105 2.63354 )
------------------------------------------------------------
# Chi-Squared = 63.26 using 59 PHA bins.
# Reduced chi-squared = 1.130 for 56 degrees of freedom
# Null hypothesis probability = 2.355466e-01
Photon flux (15-150 keV) in 1 sec: 0.797276 ( -0.145461 0.147544 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.53176e-08 ( -9.5519e-09 1.30939e-08 ) ergs/cm2
Band function
Time interval is from 0.708 sec. to 1.708 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99089 ( -221.732 -211.732 )
beta : -2.67575 ( -0.921019 0.528421 )
Epeak [keV] : 30.7133 ( -5.36112 5.03445 )
Norm@50keV : 266.510 ( -266.068 2634.12 )
------------------------------------------------------------
# Chi-Squared = 62.42 using 59 PHA bins.
# Reduced chi-squared = 1.135 for 55 degrees of freedom
# Null hypothesis probability = 2.295005e-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] : 10.2451 (-1.59399 1.93284)
R^2/D10^2 : 0.382501 (-0.187999 0.355165)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 64.53 using 59 PHA bins.
# Reduced chi-squared = 1.132 for 57 degrees of freedom
# Null hypothesis probability = 2.302670e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.241e-09 2.523e-09
25- 50 2.119e-08 5.295e-09
50-150 1.186e-08 4.857e-09
15-150 4.129e-08 9.765e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 63.9526 (-22.4578 45.9067)
Norm : 4.44841 (-1.04615 1.34199)
------------------------------------------------------------
# Chi-Squared = 66.12 using 59 PHA bins.
# Reduced chi-squared = 1.160 for 57 degrees of freedom
# Null hypothesis probability = 1.910031e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.129e-08 2.657e-09
25- 50 1.751e-08 3.935e-09
50-150 2.098e-08 1.071e-08
15-150 4.978e-08 1.469e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.16751 (-7.23606 -7.23606)
R1^2/D10^2 : 0.882182 (-0.878903 -0.878903)
kT2 [keV] : 15.5695 (-15.7281 -15.7281)
R2^2/D10^2 : 4.36314E-02 (-0.0422882 0.516577)
------------------------------------------------------------
# Chi-Squared = 62.72 using 59 PHA bins.
# Reduced chi-squared = 1.140 for 55 degrees of freedom
# Null hypothesis probability = 2.213980e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.656e-09 5.450e-09
25- 50 1.972e-08 1.146e-08
50-150 1.708e-08 1.066e-08
15-150 4.646e-08 2.752e-08
Plot creation:
Wed Aug 8 02:11:00 EDT 2012