batgrbproduct Analysis for Trigger=522586
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 03:21:38 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger522586/GCN5_download_cron
======================================================================
Trigger: 00522586 Segment: 000
BAT Trigger Time: 359284077.056 [s; MET]
Trigger Stop: 359284089.216 [s; MET]
UTC: 2012-05-21T09:07:48.825220 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 197.013854919207 Dec: -52.7460338744419 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.56
Image Trigger?: NO
Rate S/N Ratio: 11.6189500386223 [ if not an image trigger ]
Image S/N Ratio: 8.56
Flight Position: [ source = BAT ]
RA: 197.013854919207 Dec: -52.7460338744419 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 197.013590312059 Dec: -52.7504208789443 [deg; J2000]
{ 13h 08m 03.3s , -52d 45' 01.5" }
+/- 1.6708275056939 [arcmin] (estimated 90% radius based on SNR)
+/- 0.713874406568293 [arcmin] (formal 1-sigma fit error)
SNR: 14.6098125111484
Angular difference between Flight and Ground position is 0.263396 arcmin
Partial Coding Fraction: 0.3554688 [ including projection effects ]
Duration
T90: 48 +/- 22.6274169979695
Measured from: -7.05599987506866
to: 40.9440001249313 [s; relative to TRIGTIME]
T50: 16 +/- 16
Measured from: 8.94400012493134
to: 24.9440001249313 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 16.444000005722
to: 17.444000005722 [s; relative to TRIGTIME]
Total Fluence
Measured from: -7.05599999427795
to: 40.944000005722 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.325335 0.694675 0.751959 0.222316
0.065725 0.068625 0.062705 0.058696 [error]
Peak 0.016632 0.025100 0.019263 0.009449
0.009555 0.009688 0.009647 0.008659 [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 1.12e-07 2.75e-07 5.42e-07 2.65e-06 1.46e-06 3.58e-06 erg/cm2
Error 2.32e-08 3.40e-08 5.87e-08 6.70e-07 1.55e-07 6.96e-07 erg/cm2
Peak flux Power-law 2.26e-01 1.80e-01 9.61e-02 7.50e-02 5.36e-01 5.77e-01 ph/cm2/s
Error 1.46e-01 8.29e-02 7.86e-02 1.42e-01 2.35e-01 2.69e-01 ph/cm2/s
Fluence Cutoff-PL 9.24e-08 2.84e-07 5.81e-07 1.21e-06 2.17e-06 0.00e+00 erg/cm2
Error 3.01e-08 3.79e-08 7.30e-08 1.05e-06 1.17e-06 0.00e+00 erg/cm2
Peak flux Cutoff-PL 2.27e-01 1.80e-01 9.60e-02 7.42e-02 5.31e-01 5.73e-01 ph/cm2/s
Error 1.47e-01 8.72e-02 7.88e-02 1.39e-01 2.34e-01 2.67e-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 1.022 0.176 - - 2.84e-03 2.85e-04 65.870 57
CPL 0.301 0.815 138.4 -46.1 5.80e-03 5.21e-03 63.130 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.901 1.145 - - 3.73e-03 2.94e-03 52.030 57
CPL 3.446 0.000 386.2 0.0 6.77e-04 0.00e+00 51.680 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: 22.720000 sec.
T50 in the 50-300 keV band: 13.440000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 48.000 -7.056 40.944
T90 48.000 -7.056 40.944
T50 16.000 8.944 24.944
Peak 1.000 16.444 17.444
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
197.0136 -52.7504 0.0131 30.0 102.1 2.1889 14.6 TRIG_00522586
------------------------------------------
Foreground time interval of the image:
-7.056 40.944 (delta_t = 48.000 [sec])
Background time interval of the image:
-119.056 -66.126 (delta_t = 52.930 [sec])
-60.056 -7.056 (delta_t = 53.000 [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 -7.056 sec. to 40.944 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.02185 ( -0.178539 0.173269 )
Norm@50keV : 2.84378E-03 ( -0.000285848 0.000284582 )
------------------------------------------------------------
# Chi-Squared = 65.87 using 59 PHA bins.
# Reduced chi-squared = 1.156 for 57 degrees of freedom
# Null hypothesis probability = 1.967569e-01
Photon flux (15-150 keV) in 48 sec: 0.327792 ( -0.0336975 0.0338919 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.465e-06 ( -1.54345e-07 1.54774e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -7.056 sec. to 40.944 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.301197 ( -0.905849 0.723309 )
Epeak [keV] : 138.409 ( -46.2687 -138.409 )
Norm@50keV : 5.79882E-03 ( -0.00279075 0.00763684 )
------------------------------------------------------------
# Chi-Squared = 63.13 using 59 PHA bins.
# Reduced chi-squared = 1.127 for 56 degrees of freedom
# Null hypothesis probability = 2.390698e-01
Photon flux (15-150 keV) in 48 sec: 0.315934 ( -0.036032 0.036003 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.16727e-06 ( -6.34397e-07 1.71137e-06 ) ergs/cm2
Band function
Time interval is from -7.056 sec. to 40.944 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.301178 ( -0.416832 0.483728 )
beta : -10.00000 ( 2.46561e+10 2.46561e+10 )
Epeak [keV] : 138.391 ( -46.2675 -138.39 )
Norm@50keV : 5.79899E-03 ( -0.00295576 0.00762607 )
------------------------------------------------------------
# Chi-Squared = 63.13 using 59 PHA bins.
# Reduced chi-squared = 1.148 for 55 degrees of freedom
# Null hypothesis probability = 2.110888e-01
Photon flux (15-150 keV) in 48 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] : 22.1758 (-2.63069 3.17533)
R^2/D10^2 : 1.14223E-02 (-0.00394295 0.00571204)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 70.77 using 59 PHA bins.
# Reduced chi-squared = 1.242 for 57 degrees of freedom
# Null hypothesis probability = 1.039006e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.971e-08 1.071e-08
25- 50 2.641e-07 4.188e-08
50-150 9.706e-07 1.637e-07
15-150 1.284e-06 1.822e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.997 ( )
Norm : 1.36589 (-1.36589 -1.36589)
------------------------------------------------------------
# Chi-Squared = 90.23 using 59 PHA bins.
# Reduced chi-squared = 1.583 for 57 degrees of freedom
# Null hypothesis probability = 3.311711e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.633e-07 8.678e-08
25- 50 3.140e-07 1.678e-07
50-150 6.888e-07 3.679e-07
15-150 1.166e-06 6.266e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.02795 (-5.13338 6.61679)
R1^2/D10^2 : 0.165896 (-0.13948 131.203)
kT2 [keV] : 27.3086 (-5.65583 16.4628)
R2^2/D10^2 : 5.36286E-03 (-0.00435685 0.00639771)
------------------------------------------------------------
# Chi-Squared = 62.73 using 59 PHA bins.
# Reduced chi-squared = 1.141 for 55 degrees of freedom
# Null hypothesis probability = 2.213061e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.521e-08 5.135e-08
25- 50 2.756e-07 1.176e-07
50-150 1.036e-06 4.976e-07
15-150 1.407e-06 5.646e-07
Peak spectrum fit
Power-law model
Time interval is from 16.444 sec. to 17.444 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.90107 ( -0.93714 1.35268 )
Norm@50keV : 3.73022E-03 ( -0.00373017 0.00215519 )
------------------------------------------------------------
# Chi-Squared = 52.03 using 59 PHA bins.
# Reduced chi-squared = 0.9127 for 57 degrees of freedom
# Null hypothesis probability = 6.617468e-01
Photon flux (15-150 keV) in 1 sec: 0.535566 ( -0.234492 0.234598 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.42926e-08 ( -1.94124e-08 2.2149e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 16.444 sec. to 17.444 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.44577 ( )
Epeak [keV] : 386.218 ( )
Norm@50keV : 6.77299E-04 ( )
------------------------------------------------------------
# Chi-Squared = 51.68 using 59 PHA bins.
# Reduced chi-squared = 0.9228 for 56 degrees of freedom
# Null hypothesis probability = 6.390228e-01
Photon flux (15-150 keV) in 1 sec: 0.531379 ( -0.230092 0.238419 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.90335e-08 ( -3.32278e-08 7.32735e-08 ) ergs/cm2
Band function
Time interval is from 16.444 sec. to 17.444 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.66674 ( 1.67272 1.67272 )
beta : -1.89861 ( 1.90096 0.935859 )
Epeak [keV] : 17.8948 ( -16.3225 -16.3225 )
Norm@50keV : 6.50126E-03 ( -0.00415449 0.793692 )
------------------------------------------------------------
# Chi-Squared = 52.03 using 59 PHA bins.
# Reduced chi-squared = 0.9459 for 55 degrees of freedom
# Null hypothesis probability = 5.890005e-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] : 8.52358 (-4.84341 18.626)
R^2/D10^2 : 0.419647 (-0.402109 12.6657)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 54.90 using 59 PHA bins.
# Reduced chi-squared = 0.9632 for 57 degrees of freedom
# Null hypothesis probability = 5.541780e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.756e-09 3.759e-09
25- 50 1.121e-08 7.670e-09
50-150 3.612e-09 3.016e-09
15-150 2.058e-08 1.477e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 96.6034 (-96.7497 -96.7497)
Norm : 2.35615 (-1.14058 4.78686)
------------------------------------------------------------
# Chi-Squared = 52.44 using 59 PHA bins.
# Reduced chi-squared = 0.9199 for 57 degrees of freedom
# Null hypothesis probability = 6.467362e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.157e-09 4.079e-09
25- 50 1.057e-08 6.765e-09
50-150 1.679e-08 1.374e-08
15-150 3.352e-08 2.398e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.60818 (-3.26389 7.9138)
R1^2/D10^2 : 11.9028 (-11.9162 49.0162)
kT2 [keV] : 22.0118 (-20.3304 -21.9835)
R2^2/D10^2 : 1.23638E-02 (-0.0124212 0.688246)
------------------------------------------------------------
# Chi-Squared = 51.73 using 59 PHA bins.
# Reduced chi-squared = 0.9406 for 55 degrees of freedom
# Null hypothesis probability = 6.002314e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.530e-09 4.469e-09
25- 50 7.573e-09 4.622e-09
50-150 2.124e-08 1.586e-08
15-150 3.634e-08 2.264e-08
Plot creation:
Tue May 22 03:36:49 EDT 2012