batgrbproduct Analysis for Trigger=522656
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): Tue May 22 07:46:12 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger522656/batgroup_hand_proc
======================================================================
Trigger: 00522656 Segment: 000
BAT Trigger Time: 359335335.936 [s; MET]
Trigger Stop: 359335336.96 [s; MET]
UTC: 2012-05-21T23:22:07.703120 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 214.28954900101 Dec: 42.1230533213039 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 13.33
Image Trigger?: NO
Rate S/N Ratio: 29.4108823397055 [ if not an image trigger ]
Image S/N Ratio: 13.33
Flight Position: [ source = BAT ]
RA: 214.28954900101 Dec: 42.1230533213039 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 214.287894860563 Dec: 42.1443831342319 [deg; J2000]
{ 14h 17m 09.1s , +42d 08' 39.8" }
+/- 1.00383809603551 [arcmin] (estimated 90% radius based on SNR)
+/- 0.363575718702112 [arcmin] (formal 1-sigma fit error)
SNR: 30.2511370999
Angular difference between Flight and Ground position is 1.281903 arcmin
Partial Coding Fraction: 0.6796875 [ including projection effects ]
Duration
T90: 26.7359999418259 +/- 4.4099641931621
Measured from: 0.0320000052452087
to: 26.7679999470711 [s; relative to TRIGTIME]
T50: 10.2719999551773 +/- 1.35674907050128
Measured from: 1.44800001382828
to: 11.7199999690056 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.0199999809265137
to: 0.980000019073486 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.03200000524521
to: 31.8439999818802 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.628024 0.782241 0.493249 0.099729
0.038246 0.039183 0.035544 0.031611 [error]
Peak 0.053723 0.089118 0.078284 0.026090
0.007546 0.008173 0.007652 0.006177 [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 1.96e-07 3.14e-07 3.80e-07 8.99e-07 1.15e-06 1.79e-06 erg/cm2
Error 1.90e-08 1.90e-08 3.50e-08 1.73e-07 8.11e-08 2.04e-07 erg/cm2
Peak flux Power-law 5.26e-01 6.08e-01 5.06e-01 7.08e-01 1.90e+00 2.35e+00 ph/cm2/s
Error 9.84e-02 6.87e-02 6.19e-02 1.84e-01 1.93e-01 2.51e-01 ph/cm2/s
Fluence Cutoff-PL 1.84e-07 3.29e-07 3.82e-07 4.45e-07 1.34e-06 0.00e+00 erg/cm2
Error 2.22e-08 2.41e-08 3.74e-08 3.22e-07 3.37e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 5.13e-01 6.14e-01 5.12e-01 6.15e-01 1.89e+00 2.25e+00 ph/cm2/s
Error 1.15e-01 7.52e-02 6.98e-02 2.96e-01 1.50e-01 3.62e-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 1.726 0.113 - - 3.78e-03 2.53e-04 72.270 57
CPL 1.281 0.462 75.1 266.9 6.51e-03 3.92e-03 69.220 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.267 0.179 - - 1.60e-02 1.61e-03 62.230 57
CPL 1.146 0.496 361.8 0.0 1.82e-02 1.94e-02 62.140 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: 9.472000 sec.
T50 in the 50-300 keV band: 4.544000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 32.876 -1.032 31.844
T90 26.736 0.032 26.768
T50 10.272 1.448 11.720
Peak 1.000 -0.020 0.980
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
214.2879 +42.1444 0.0064 19.2 95.5 1.7703 30.3 TRIG_00522656
------------------------------------------
Foreground time interval of the image:
-1.032 17.365 (delta_t = 18.397 [sec])
Background time interval of the image:
-180.435 -1.032 (delta_t = 179.403 [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 -1.032 sec. to 31.844 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.72576 ( -0.111579 0.113845 )
Norm@50keV : 3.77588E-03 ( -0.000254118 0.000251676 )
------------------------------------------------------------
# Chi-Squared = 72.27 using 59 PHA bins.
# Reduced chi-squared = 1.268 for 57 degrees of freedom
# Null hypothesis probability = 8.365954e-02
Photon flux (15-150 keV) in 32.88 sec: 0.506077 ( -0.0308437 0.0308701 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.14732e-06 ( -8.06323e-08 8.14684e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.032 sec. to 31.844 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.28069 ( -0.487157 0.436242 )
Epeak [keV] : 75.0816 ( -19.046 514.701 )
Norm@50keV : 6.51022E-03 ( -0.00264005 0.00520644 )
------------------------------------------------------------
# Chi-Squared = 69.22 using 59 PHA bins.
# Reduced chi-squared = 1.236 for 56 degrees of freedom
# Null hypothesis probability = 1.103312e-01
Photon flux (15-150 keV) in 32.88 sec: 0.494051 ( -0.032891 0.032893 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.34047e-06 ( -2.31748e-07 4.42811e-07 ) ergs/cm2
Band function
Time interval is from -1.032 sec. to 31.844 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.28066 ( -0.322461 0.541011 )
beta : -10.00000 ( 1.70151e+11 1.70151e+11 )
Epeak [keV] : 75.0671 ( -19.043 514.627 )
Norm@50keV : 6.50956E-03 ( -0.00264019 0.00520823 )
------------------------------------------------------------
# Chi-Squared = 69.22 using 59 PHA bins.
# Reduced chi-squared = 1.259 for 55 degrees of freedom
# Null hypothesis probability = 9.397649e-02
Photon flux (15-150 keV) in 32.88 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] : 12.2545 ( )
R^2/D10^2 : 0.111315 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 122.33 using 59 PHA bins.
# Reduced chi-squared = 2.1461 for 57 degrees of freedom
# Null hypothesis probability = 1.139485e-06
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.164e-07 1.266e-08
25- 50 3.755e-07 2.745e-08
50-150 3.437e-07 5.345e-08
15-150 8.356e-07 6.083e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 119.502 (-8.09798 62.4529)
Norm : 2.14874 (-0.165235 0.188117)
------------------------------------------------------------
# Chi-Squared = 69.22 using 59 PHA bins.
# Reduced chi-squared = 1.214 for 57 degrees of freedom
# Null hypothesis probability = 1.285966e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.840e-07 1.685e-08
25- 50 3.290e-07 1.988e-08
50-150 5.860e-07 8.253e-08
15-150 1.099e-06 1.032e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.87378 (-1.23311 1.28168)
R1^2/D10^2 : 0.614433 (-0.262939 0.593909)
kT2 [keV] : 23.5980 (-4.50892 7.44565)
R2^2/D10^2 : 7.46261E-03 (-0.00472945 0.00968355)
------------------------------------------------------------
# Chi-Squared = 68.65 using 59 PHA bins.
# Reduced chi-squared = 1.248 for 55 degrees of freedom
# Null hypothesis probability = 1.021549e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.749e-07 4.038e-08
25- 50 3.334e-07 5.770e-08
50-150 5.898e-07 2.674e-07
15-150 1.098e-06 3.083e-07
Peak spectrum fit
Power-law model
Time interval is from -0.020 sec. to 0.980 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.26663 ( -0.178489 0.178559 )
Norm@50keV : 1.59832E-02 ( -0.00161082 0.0016064 )
------------------------------------------------------------
# Chi-Squared = 62.23 using 59 PHA bins.
# Reduced chi-squared = 1.092 for 57 degrees of freedom
# Null hypothesis probability = 2.953987e-01
Photon flux (15-150 keV) in 1 sec: 1.89561 ( -0.192774 0.193063 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.59268e-07 ( -1.82107e-08 1.83796e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.020 sec. to 0.980 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.14589 ( -0.708057 0.284206 )
Epeak [keV] : 361.847 ( -378.598 -378.598 )
Norm@50keV : 1.82389E-02 ( -0.018267 0.0204678 )
------------------------------------------------------------
# Chi-Squared = 62.14 using 59 PHA bins.
# Reduced chi-squared = 1.110 for 56 degrees of freedom
# Null hypothesis probability = 2.666647e-01
Photon flux (15-150 keV) in 1 sec: 1.88562 ( -0.19965 0.09961 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.9226e-07 ( -1.09246e-07 1.02983e-07 ) ergs/cm2
Band function
Time interval is from -0.020 sec. to 0.980 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.12398 ( 0.984569 2.07723 )
beta : -9.98033 ( 166.788 176.788 )
Epeak [keV] : 325.220 ( -206.689 -325.325 )
Norm@50keV : 1.87352E-02 ( -0.0040943 0.0199912 )
------------------------------------------------------------
# Chi-Squared = 62.13 using 59 PHA bins.
# Reduced chi-squared = 1.130 for 55 degrees of freedom
# Null hypothesis probability = 2.371832e-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] : 17.9849 (-2.46495 2.96396)
R^2/D10^2 : 0.120774 (-0.0473648 0.0761527)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 85.78 using 59 PHA bins.
# Reduced chi-squared = 1.505 for 57 degrees of freedom
# Null hypothesis probability = 8.165841e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.824e-09 1.656e-09
25- 50 3.616e-08 5.485e-09
50-150 8.488e-08 1.606e-08
15-150 1.289e-07 1.770e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.997 ( )
Norm : 7.77609 (-7.77609 -7.77609)
------------------------------------------------------------
# Chi-Squared = 69.40 using 59 PHA bins.
# Reduced chi-squared = 1.218 for 57 degrees of freedom
# Null hypothesis probability = 1.255083e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.936e-08 1.032e-08
25- 50 3.725e-08 1.986e-08
50-150 8.169e-08 4.348e-08
15-150 1.383e-07 7.405e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.69743 (-2.52349 2.81533)
R1^2/D10^2 : 1.22948 (-0.758849 3.58043)
kT2 [keV] : 31.7696 (-8.33011 20.497)
R2^2/D10^2 : 1.55500E-02 (-0.0120362 0.0191119)
------------------------------------------------------------
# Chi-Squared = 62.18 using 59 PHA bins.
# Reduced chi-squared = 1.131 for 55 degrees of freedom
# Null hypothesis probability = 2.357014e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.515e-08 7.504e-09
25- 50 3.585e-08 1.543e-08
50-150 1.088e-07 5.713e-08
15-150 1.598e-07 7.062e-08
Plot creation:
Tue May 22 08:43:33 EDT 2012