batgrbproduct Analysis for Trigger=522197
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): Mon May 14 10:38:23 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger522197/GCN5_download_cron
======================================================================
Trigger: 00522197 Segment: 000
BAT Trigger Time: 358650778.112 [s; MET]
Trigger Stop: 358650779.136 [s; MET]
UTC: 2012-05-14T01:12:49.907220 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 282.990951117893 Dec: -4.25198537883337 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 12.68
Image Trigger?: NO
Rate S/N Ratio: 20.4939015319192 [ if not an image trigger ]
Image S/N Ratio: 12.68
Flight Position: [ source = BAT ]
RA: 282.990951117893 Dec: -4.25198537883337 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 283.001859495322 Dec: -4.25802642593745 [deg; J2000]
{ 18h 52m 00.4s , -04d 15' 28.9" }
+/- 1.10980544176325 [arcmin] (estimated 90% radius based on SNR)
+/- 0.520620365496379 [arcmin] (formal 1-sigma fit error)
SNR: 26.2107846877241
Angular difference between Flight and Ground position is 0.746589 arcmin
Partial Coding Fraction: 0.6171875 [ including projection effects ]
Duration
T90: 158.783999919891 +/- 5.85238585139214
Measured from: -6.46399986743927
to: 152.320000052452 [s; relative to TRIGTIME]
T50: 60.1479999423027 +/- 6.11855406914048
Measured from: -0.31199985742569
to: 59.836000084877 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.220000028610229
to: 1.22000002861023 [s; relative to TRIGTIME]
Total Fluence
Measured from: -8.75199997425079
to: 165.551999986172 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.326414 1.670662 1.279966 0.236531
0.092954 0.085138 0.071037 0.058911 [error]
Peak 0.041321 0.088279 0.084015 0.034050
0.009806 0.009422 0.008145 0.006090 [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 4.34e-07 7.41e-07 9.66e-07 2.55e-06 2.84e-06 4.69e-06 erg/cm2
Error 4.48e-08 4.52e-08 6.98e-08 4.06e-07 1.68e-07 4.51e-07 erg/cm2
Peak flux Power-law 5.04e-01 6.14e-01 5.42e-01 8.24e-01 1.95e+00 2.48e+00 ph/cm2/s
Error 1.18e-01 8.75e-02 6.21e-02 2.04e-01 2.32e-01 2.71e-01 ph/cm2/s
Fluence Cutoff-PL 4.17e-07 7.53e-07 9.80e-07 1.95e-06 4.10e-06 0.00e+00 erg/cm2
Error 4.11e-08 5.09e-08 7.61e-08 6.58e-07 8.08e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 4.71e-01 6.21e-01 5.59e-01 6.55e-01 1.93e+00 2.31e+00 ph/cm2/s
Error 1.45e-01 9.22e-02 7.82e-02 3.39e-01 2.41e-01 4.22e-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 1.618 0.103 - - 1.74e-03 9.83e-05 44.800 57
CPL 1.432 0.300 159.4 0.0 2.15e-03 0.00e+00 44.120 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.179 0.191 - - 1.66e-02 1.85e-03 67.580 57
CPL 0.934 0.622 255.2 0.0 2.13e-02 1.69e-02 67.250 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: 59.584000 sec.
T50 in the 50-300 keV band: 13.568000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 174.304 -8.752 165.552
T90 158.784 -6.464 152.320
T50 60.148 -0.312 59.836
Peak 1.000 0.220 1.220
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
283.0019 -4.2580 0.0074 35.8 178.0 2.1493 26.2 TRIG_00522197
------------------------------------------
Foreground time interval of the image:
-8.752 17.389 (delta_t = 26.141 [sec])
Background time interval of the image:
-239.112 -8.752 (delta_t = 230.360 [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 -8.752 sec. to 165.552 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.61828 ( -0.102333 0.102759 )
Norm@50keV : 1.74339E-03 ( -9.84354e-05 9.81824e-05 )
------------------------------------------------------------
# Chi-Squared = 44.80 using 59 PHA bins.
# Reduced chi-squared = 0.7860 for 57 degrees of freedom
# Null hypothesis probability = 8.794897e-01
Photon flux (15-150 keV) in 174.3 sec: 0.225321 ( -0.013566 0.0136187 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.83576e-06 ( -1.68052e-07 1.68585e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -8.752 sec. to 165.552 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.43157 ( -0.415441 0.184515 )
Epeak [keV] : 159.445 ( )
Norm@50keV : 2.14551E-03 ( )
------------------------------------------------------------
# Chi-Squared = 44.12 using 59 PHA bins.
# Reduced chi-squared = 0.7879 for 56 degrees of freedom
# Null hypothesis probability = 8.747293e-01
Photon flux (15-150 keV) in 174.3 sec: 0.222650 ( -0.014548 0.014594 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.1045e-06 ( -8.10722e-07 8.05719e-07 ) ergs/cm2
Band function
Time interval is from -8.752 sec. to 165.552 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.43258 ( 1.34016 6.15926 )
beta : -3.52713 ( 6.78726 16.6853 )
Epeak [keV] : 160.023 ( -58.8135 -160.023 )
Norm@50keV : 2.14280E-03 ( -0.000119126 0.000637522 )
------------------------------------------------------------
# Chi-Squared = 44.12 using 59 PHA bins.
# Reduced chi-squared = 0.8022 for 55 degrees of freedom
# Null hypothesis probability = 8.531334e-01
Photon flux (15-150 keV) in 174.3 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] : 15.2298 ( )
R^2/D10^2 : 2.28243E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 120.58 using 59 PHA bins.
# Reduced chi-squared = 2.1154 for 57 degrees of freedom
# Null hypothesis probability = 1.858516e-06
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.927e-07 2.180e-08
25- 50 7.763e-07 5.952e-08
50-150 1.234e-06 1.258e-07
15-150 2.203e-06 1.386e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 180.561 ( )
Norm : 0.910142 (-0.0567462 0.0639979)
------------------------------------------------------------
# Chi-Squared = 44.61 using 59 PHA bins.
# Reduced chi-squared = 0.7827 for 57 degrees of freedom
# Null hypothesis probability = 8.835605e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.915e-07 2.001e-07
25- 50 7.528e-07 3.876e-07
50-150 1.649e-06 8.487e-07
15-150 2.794e-06 1.431e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.68691 (-1.4376 1.61246)
R1^2/D10^2 : 0.280787 (-0.146296 0.417121)
kT2 [keV] : 25.0796 (-4.09445 6.80497)
R2^2/D10^2 : 3.10274E-03 (-0.0018157 0.00305703)
------------------------------------------------------------
# Chi-Squared = 48.00 using 59 PHA bins.
# Reduced chi-squared = 0.8727 for 55 degrees of freedom
# Null hypothesis probability = 7.369372e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.934e-07 9.351e-08
25- 50 7.536e-07 1.289e-07
50-150 1.621e-06 3.171e-07
15-150 2.768e-06 5.325e-07
Peak spectrum fit
Power-law model
Time interval is from 0.220 sec. to 1.220 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.17933 ( -0.194615 0.188218 )
Norm@50keV : 1.66401E-02 ( -0.00185166 0.00184002 )
------------------------------------------------------------
# Chi-Squared = 67.58 using 59 PHA bins.
# Reduced chi-squared = 1.186 for 57 degrees of freedom
# Null hypothesis probability = 1.593523e-01
Photon flux (15-150 keV) in 1 sec: 1.94774 ( -0.231339 0.233012 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.69821e-07 ( -1.89428e-08 1.89801e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.220 sec. to 1.220 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.934265 ( -0.833726 0.410335 )
Epeak [keV] : 255.202 ( -255.202 -255.202 )
Norm@50keV : 2.13005E-02 ( -0.00790216 0.0259387 )
------------------------------------------------------------
# Chi-Squared = 67.25 using 59 PHA bins.
# Reduced chi-squared = 1.201 for 56 degrees of freedom
# Null hypothesis probability = 1.442000e-01
Photon flux (15-150 keV) in 1 sec: 1.92507 ( -0.24056 0.24173 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.05208e-07 ( -1.06755e-07 1.35809e-07 ) ergs/cm2
Band function
Time interval is from 0.220 sec. to 1.220 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.04965 ( -6.96974 -6.96974 )
beta : -1.28721 ( -0.270263 0.234437 )
Epeak [keV] : 38.6884 ( -33.5193 7.27496 )
Norm@50keV : 2.20353 ( -2.06306 152.789 )
------------------------------------------------------------
# Chi-Squared = 66.63 using 59 PHA bins.
# Reduced chi-squared = 1.211 for 55 degrees of freedom
# Null hypothesis probability = 1.352822e-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] : 21.3943 (-2.82257 3.4725)
R^2/D10^2 : 7.21075E-02 (-0.0284053 0.043977)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 82.23 using 59 PHA bins.
# Reduced chi-squared = 1.443 for 57 degrees of freedom
# Null hypothesis probability = 1.600325e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.185e-09 1.401e-09
25- 50 3.216e-08 5.560e-09
50-150 1.099e-07 2.067e-08
15-150 1.482e-07 2.080e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.997 ( )
Norm : 8.41156 (-8.41156 -8.41156)
------------------------------------------------------------
# Chi-Squared = 79.31 using 59 PHA bins.
# Reduced chi-squared = 1.391 for 57 degrees of freedom
# Null hypothesis probability = 2.698468e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.095e-08 1.111e-08
25- 50 4.030e-08 2.119e-08
50-150 8.838e-08 4.715e-08
15-150 1.496e-07 8.065e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.68462 (-2.57652 4.73216)
R1^2/D10^2 : 1.15999 (-0.879667 3.7773)
kT2 [keV] : 31.3851 (-7.47974 31.0835)
R2^2/D10^2 : 1.77336E-02 (-0.0154807 0.0277291)
------------------------------------------------------------
# Chi-Squared = 66.92 using 59 PHA bins.
# Reduced chi-squared = 1.217 for 55 degrees of freedom
# Null hypothesis probability = 1.301223e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.466e-08 8.190e-09
25- 50 3.625e-08 1.726e-08
50-150 1.184e-07 5.982e-08
15-150 1.693e-07 7.803e-08
Plot creation:
Mon May 14 10:55:50 EDT 2012