batgrbproduct Analysis for Trigger=535764
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): Fri Oct 12 13:46:30 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger535764/GCN5_download_cron
======================================================================
Trigger: 00535764 Segment: 000
BAT Trigger Time: 371646940.16 [s; MET]
Trigger Stop: 371646942.208 [s; MET]
UTC: 2012-10-11T11:15:30.412760 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 260.200124470458 Dec: 41.1367639177282 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.18
Image Trigger?: NO
Rate S/N Ratio: 13.1529464379659 [ if not an image trigger ]
Image S/N Ratio: 7.18
Flight Position: [ source = BAT ]
RA: 260.200124470458 Dec: 41.1367639177282 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 260.200034347754 Dec: 41.1190074274635 [deg; J2000]
{ 17h 20m 48.0s , +41d 07' 08.4" }
+/- 1.67958178627011 [arcmin] (estimated 90% radius based on SNR)
+/- 0.649412120188298 [arcmin] (formal 1-sigma fit error)
SNR: 14.5011499111725
Angular difference between Flight and Ground position is 1.065397 arcmin
Partial Coding Fraction: 0.328125 [ including projection effects ]
Duration
T90: 97.2319999337196 +/- 17.1782137718252
Measured from: -4.5599998831749
to: 92.6720000505447 [s; relative to TRIGTIME]
T50: 43.5279999375343 +/- 11.5297139844277
Measured from: 1.56800007820129
to: 45.0960000157356 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.648000001907349
to: 0.351999998092651 [s; relative to TRIGTIME]
Total Fluence
Measured from: -7.45200002193451
to: 109.599999964237 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.503189 1.174498 1.144038 0.287532
0.094218 0.093295 0.081650 0.069715 [error]
Peak 0.027354 0.037381 0.061409 0.031776
0.012169 0.012250 0.011441 0.009537 [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 2.46e-07 5.21e-07 8.68e-07 3.29e-06 2.39e-06 4.93e-06 erg/cm2
Error 4.08e-08 5.26e-08 7.75e-08 6.53e-07 2.01e-07 6.90e-07 erg/cm2
Peak flux Power-law 2.31e-01 3.36e-01 3.65e-01 7.38e-01 1.16e+00 1.67e+00 ph/cm2/s
Error 1.43e-01 1.28e-01 8.68e-02 3.92e-01 3.24e-01 4.13e-01 ph/cm2/s
Fluence Cutoff-PL 1.97e-07 5.47e-07 9.49e-07 1.35e-06 3.04e-06 0.00e+00 erg/cm2
Error 5.07e-08 5.98e-08 9.79e-08 8.49e-07 8.53e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 2.20e-01 3.35e-01 3.71e-01 6.68e-01 1.15e+00 1.59e+00 ph/cm2/s
Error 1.70e-01 1.36e-01 1.09e-01 5.94e-01 3.34e-01 6.53e-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 1.39e+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 1.264 0.139 - - 2.05e-03 1.70e-04 43.350 57
CPL 0.407 0.664 107.2 71.0 4.88e-03 3.53e-03 37.390 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.884 0.469 - - 1.01e-02 2.85e-03 58.340 57
CPL 0.754 0.899 655.4 0.0 1.13e-02 3.31e-02 58.330 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: 50.496000 sec.
T50 in the 50-300 keV band: 25.664000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 117.052 -7.452 109.600
T90 97.232 -4.560 92.672
T50 43.528 1.568 45.096
Peak 1.000 -0.648 0.352
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
260.2000 +41.1190 0.0133 47.6 -18.0 1.9718 14.5 TRIG_00535764
------------------------------------------
Foreground time interval of the image:
-7.452 21.941 (delta_t = 29.393 [sec])
Background time interval of the image:
-239.160 -7.452 (delta_t = 231.708 [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 -7.452 sec. to 109.600 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.26407 ( -0.14047 0.137632 )
Norm@50keV : 2.04774E-03 ( -0.000170085 0.000169639 )
------------------------------------------------------------
# Chi-Squared = 43.35 using 59 PHA bins.
# Reduced chi-squared = 0.7604 for 57 degrees of freedom
# Null hypothesis probability = 9.089583e-01
Photon flux (15-150 keV) in 117.1 sec: 0.242758 ( -0.0218423 0.0219889 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.39103e-06 ( -2.00454e-07 2.00775e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -7.452 sec. to 109.600 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.407212 ( -0.713803 0.613389 )
Epeak [keV] : 107.238 ( -24.962 117.016 )
Norm@50keV : 4.87940E-03 ( -0.00221783 0.00483852 )
------------------------------------------------------------
# Chi-Squared = 37.39 using 59 PHA bins.
# Reduced chi-squared = 0.6676 for 56 degrees of freedom
# Null hypothesis probability = 9.736905e-01
Photon flux (15-150 keV) in 117.1 sec: 0.232417 ( -0.022868 0.023058 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.03846e-06 ( -5.91519e-07 1.11356e-06 ) ergs/cm2
Band function
Time interval is from -7.452 sec. to 109.600 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.408802 ( -0.602823 0.386526 )
beta : -2.10875 ( 2.21181 3.21168 )
Epeak [keV] : 106.766 ( -68.5948 115.663 )
Norm@50keV : 4.88245E-03 ( -0.00205181 0.104219 )
------------------------------------------------------------
# Chi-Squared = 37.35 using 59 PHA bins.
# Reduced chi-squared = 0.6790 for 55 degrees of freedom
# Null hypothesis probability = 9.672215e-01
Photon flux (15-150 keV) in 117.1 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] : 19.5219 (-1.80504 2.06297)
R^2/D10^2 : 1.21024E-02 (-0.0035542 0.00484139)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 51.79 using 59 PHA bins.
# Reduced chi-squared = 0.9085 for 57 degrees of freedom
# Null hypothesis probability = 6.704292e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.051e-07 1.882e-08
25- 50 5.151e-07 6.628e-08
50-150 1.450e-06 1.850e-07
15-150 2.070e-06 2.190e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.996 ( )
Norm : 1.04893 (-1.04893 -1.04893)
------------------------------------------------------------
# Chi-Squared = 54.02 using 59 PHA bins.
# Reduced chi-squared = 0.9477 for 57 degrees of freedom
# Null hypothesis probability = 5.876372e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.059e-07 1.595e-07
25- 50 5.885e-07 3.086e-07
50-150 1.291e-06 6.850e-07
15-150 2.185e-06 1.140e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.41230 (-3.4131 4.54847)
R1^2/D10^2 : 6.90142E-02 (-0.0428441 0.198181)
kT2 [keV] : 28.7634 (-6.56232 28.9678)
R2^2/D10^2 : 2.55810E-03 (-0.00231483 0.00446675)
------------------------------------------------------------
# Chi-Squared = 36.97 using 59 PHA bins.
# Reduced chi-squared = 0.6722 for 55 degrees of freedom
# Null hypothesis probability = 9.704784e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.822e-07 9.824e-08
25- 50 5.652e-07 2.953e-07
50-150 1.572e-06 7.797e-07
15-150 2.319e-06 1.062e-06
Peak spectrum fit
Power-law model
Time interval is from -0.648 sec. to 0.352 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.883694 ( -0.500141 0.437319 )
Norm@50keV : 1.01008E-02 ( -0.00294326 0.00275884 )
------------------------------------------------------------
# Chi-Squared = 58.34 using 59 PHA bins.
# Reduced chi-squared = 1.024 for 57 degrees of freedom
# Null hypothesis probability = 4.258062e-01
Photon flux (15-150 keV) in 1 sec: 1.15926 ( -0.318893 0.32822 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.14082e-07 ( -2.73535e-08 2.73752e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.648 sec. to 0.352 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.754070 ( -2.55209 -0.754061 )
Epeak [keV] : 655.394 ( -655.35 -655.35 )
Norm@50keV : 1.12706E-02 ( -0.00370319 0.0624395 )
------------------------------------------------------------
# Chi-Squared = 58.33 using 59 PHA bins.
# Reduced chi-squared = 1.042 for 56 degrees of freedom
# Null hypothesis probability = 3.898432e-01
Photon flux (15-150 keV) in 1 sec: 1.15105 ( -0.333656 0.3347 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.79552e-07 ( -1.68333e-07 1.91542e-07 ) ergs/cm2
Band function
Time interval is from -0.648 sec. to 0.352 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.776827 ( 0.776825 0.776825 )
beta : -0.883693 ( -0.437211 0.500196 )
Epeak [keV] : 20.8721 ( -20.9086 -20.9086 )
Norm@50keV : 1.60120E-02 ( -0.0083898 0 )
------------------------------------------------------------
# Chi-Squared = 58.34 using 59 PHA bins.
# Reduced chi-squared = 1.061 for 55 degrees of freedom
# Null hypothesis probability = 3.535729e-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] : 28.6529 (-7.94306 14.9556)
R^2/D10^2 : 1.90838E-02 (-0.0134437 0.0340405)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 60.32 using 59 PHA bins.
# Reduced chi-squared = 1.058 for 57 degrees of freedom
# Null hypothesis probability = 3.565533e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.520e-09 1.545e-09
25- 50 1.525e-08 8.172e-09
50-150 8.990e-08 5.066e-08
15-150 1.077e-07 6.120e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.999 ( )
Norm : 5.17838 (-5.17838 -5.17838)
------------------------------------------------------------
# Chi-Squared = 65.44 using 59 PHA bins.
# Reduced chi-squared = 1.148 for 57 degrees of freedom
# Null hypothesis probability = 2.070661e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.290e-08 7.515e-09
25- 50 2.480e-08 1.421e-08
50-150 5.440e-08 3.079e-08
15-150 9.210e-08 5.165e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.82701 (-6.82701 -6.82701)
R1^2/D10^2 : 0.803115 (-0.803115 -0.803115)
kT2 [keV] : 35.5366 (-13.0066 -35.5366)
R2^2/D10^2 : 9.33359E-03 (-0.00933359 0.0166508)
------------------------------------------------------------
# Chi-Squared = 58.19 using 59 PHA bins.
# Reduced chi-squared = 1.058 for 55 degrees of freedom
# Null hypothesis probability = 3.588300e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.507e-09 4.465e-09
25- 50 1.849e-08 1.080e-08
50-150 9.007e-08 5.045e-08
15-150 1.161e-07 6.310e-08
Plot creation:
Fri Oct 12 14:39:28 EDT 2012