batgrbproduct Analysis for Trigger=529486
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): Thu Aug 2 17:19:13 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger529486/GCN5_download_cron
======================================================================
Trigger: 00529486 Segment: 000
BAT Trigger Time: 365587261.12 [s; MET]
Trigger Stop: 365587262.144 [s; MET]
UTC: 2012-08-02T08:00:51.627560 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 44.849140054444 Dec: 13.7572427303336 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.33
Image Trigger?: NO
Rate S/N Ratio: 21.0713075057055 [ if not an image trigger ]
Image S/N Ratio: 11.33
Flight Position: [ source = BAT ]
RA: 44.849140054444 Dec: 13.7572427303336 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 44.8332761462058 Dec: 13.7619785231467 [deg; J2000]
{ 02h 59m 20.0s , +13d 45' 43.1" }
+/- 1.13853413470592 [arcmin] (estimated 90% radius based on SNR)
+/- 0.354269645731595 [arcmin] (formal 1-sigma fit error)
SNR: 25.2710923303663
Angular difference between Flight and Ground position is 0.967200 arcmin
Partial Coding Fraction: 0.5625 [ including projection effects ]
Duration
T90: 50.2880000472069 +/- 31.0246002714191
Measured from: -31.5999999046326
to: 18.6880001425743 [s; relative to TRIGTIME]
T50: 7.64800000190735 +/- 0.967040852280425
Measured from: 2.35200011730194
to: 10.0000001192093 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 7.93999999761581
to: 8.93999999761581 [s; relative to TRIGTIME]
Total Fluence
Measured from: -35.6800000071526
to: 28.0159999728203 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.947954 1.184288 0.671059 0.112085
0.051493 0.053137 0.046035 0.038432 [error]
Peak 0.097501 0.144896 0.088052 0.017311
0.007972 0.008608 0.007476 0.005305 [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 3.34e-07 4.98e-07 5.55e-07 1.17e-06 1.74e-06 2.56e-06 erg/cm2
Error 2.94e-08 2.76e-08 4.60e-08 2.00e-07 1.07e-07 2.42e-07 erg/cm2
Peak flux Power-law 1.11e+00 1.02e+00 6.44e-01 6.25e-01 3.03e+00 3.39e+00 ph/cm2/s
Error 1.30e-01 7.55e-02 6.19e-02 1.19e-01 2.21e-01 2.44e-01 ph/cm2/s
Fluence Cutoff-PL 3.06e-07 5.31e-07 5.58e-07 4.62e-07 1.86e-06 0.00e+00 erg/cm2
Error 3.52e-08 3.61e-08 5.05e-08 3.24e-07 0.00e+00 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.03e+00 1.07e+00 6.66e-01 3.70e-01 2.98e+00 3.13e+00 ph/cm2/s
Error 1.51e-01 9.22e-02 6.87e-02 2.09e-01 2.28e-01 3.09e-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 3.13e+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 1.844 0.101 - - 2.97e-03 1.81e-04 58.450 57
CPL 1.213 0.470 57.2 19.4 6.47e-03 4.02e-03 52.250 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.659 0.123 - - 2.31e-02 1.75e-03 60.790 57
CPL 1.194 0.500 84.1 3600.5 4.04e-02 2.62e-02 57.920 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: 10.496000 sec.
T50 in the 50-300 keV band: 6.592000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 63.696 -35.680 28.016
T90 50.288 -31.600 18.688
T50 7.648 2.352 10.000
Peak 1.000 7.940 8.940
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
44.8333 +13.7620 0.0076 32.3 -46.0 2.7278 25.3 TRIG_00529486
------------------------------------------
Foreground time interval of the image:
-35.680 15.681 (delta_t = 51.361 [sec])
Background time interval of the image:
-239.120 -35.680 (delta_t = 203.440 [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 -35.680 sec. to 28.016 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.84433 ( -0.10041 0.102196 )
Norm@50keV : 2.97214E-03 ( -0.000181652 0.000180174 )
------------------------------------------------------------
# Chi-Squared = 58.45 using 59 PHA bins.
# Reduced chi-squared = 1.026 for 57 degrees of freedom
# Null hypothesis probability = 4.217288e-01
Photon flux (15-150 keV) in 63.7 sec: 0.416808 ( -0.0235686 0.0236057 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.74096e-06 ( -1.06821e-07 1.07549e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -35.680 sec. to 28.016 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.21277 ( -0.497343 0.441684 )
Epeak [keV] : 57.2362 ( -9.39719 29.3337 )
Norm@50keV : 6.46906E-03 ( -0.00267233 0.00537681 )
------------------------------------------------------------
# Chi-Squared = 52.25 using 59 PHA bins.
# Reduced chi-squared = 0.9330 for 56 degrees of freedom
# Null hypothesis probability = 6.177073e-01
Photon flux (15-150 keV) in 63.7 sec: 0.402986 ( -0.025432 0.025379 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.85732e-06 ( -2.40436e-07 4.07661e-07 ) ergs/cm2
Band function
Time interval is from -35.680 sec. to 28.016 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.01162 ( -0.554775 0.751023 )
beta : -2.31622 ( 2.31513 0.353732 )
Epeak [keV] : 51.4295 ( -11.232 22.3435 )
Norm@50keV : 8.55695E-03 ( -0.00483687 0.0158798 )
------------------------------------------------------------
# Chi-Squared = 51.20 using 59 PHA bins.
# Reduced chi-squared = 0.9308 for 55 degrees of freedom
# Null hypothesis probability = 6.207451e-01
Photon flux (15-150 keV) in 63.7 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] : 11.9423 (-0.738775 0.792076)
R^2/D10^2 : 9.97386E-02 (-0.0214864 0.0272003)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 101.96 using 59 PHA bins.
# Reduced chi-squared = 1.7887 for 57 degrees of freedom
# Null hypothesis probability = 2.362119e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.916e-07 1.949e-08
25- 50 5.995e-07 3.809e-08
50-150 5.124e-07 6.520e-08
15-150 1.303e-06 8.631e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 92.6921 (-16.6227 23.175)
Norm : 1.86504 (-0.151076 0.169511)
------------------------------------------------------------
# Chi-Squared = 52.31 using 59 PHA bins.
# Reduced chi-squared = 0.9177 for 57 degrees of freedom
# Null hypothesis probability = 6.513386e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.102e-07 2.927e-08
25- 50 5.281e-07 3.089e-08
50-150 8.186e-07 2.494e-07
15-150 1.657e-06 2.513e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.78013 (-1.17657 2.30951)
R1^2/D10^2 : 1.69698 (-1.24289 4.12653)
kT2 [keV] : 16.1172 (-2.05086 5.30669)
R2^2/D10^2 : 2.69938E-02 (-0.0191989 0.0139013)
------------------------------------------------------------
# Chi-Squared = 57.55 using 59 PHA bins.
# Reduced chi-squared = 1.046 for 55 degrees of freedom
# Null hypothesis probability = 3.809231e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.110e-07 1.073e-07
25- 50 5.181e-07 1.121e-07
50-150 7.150e-07 1.381e-07
15-150 1.544e-06 2.796e-07
Peak spectrum fit
Power-law model
Time interval is from 7.940 sec. to 8.940 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.65902 ( -0.122231 0.124404 )
Norm@50keV : 2.31394E-02 ( -0.00175729 0.00174512 )
------------------------------------------------------------
# Chi-Squared = 60.79 using 59 PHA bins.
# Reduced chi-squared = 1.066 for 57 degrees of freedom
# Null hypothesis probability = 3.411464e-01
Photon flux (15-150 keV) in 1 sec: 3.03048 ( -0.221186 0.221417 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.15015e-07 ( -1.72276e-08 1.7337e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 7.940 sec. to 8.940 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.19396 ( -0.531173 0.469613 )
Epeak [keV] : 84.0563 ( -23.3227 7177.61 )
Norm@50keV : 4.04188E-02 ( -0.0170483 0.0353396 )
------------------------------------------------------------
# Chi-Squared = 57.92 using 59 PHA bins.
# Reduced chi-squared = 1.034 for 56 degrees of freedom
# Null hypothesis probability = 4.044405e-01
Photon flux (15-150 keV) in 1 sec: 2.97562 ( -0.22797 0.22798 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.59815e-07 ( -4.8279e-08 9.1071e-08 ) ergs/cm2
Band function
Time interval is from 7.940 sec. to 8.940 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.19391 ( -0.342621 0.559012 )
beta : -10.00000 ( 5.50965e+10 5.50965e+10 )
Epeak [keV] : 84.0383 ( -23.3176 1285.69 )
Norm@50keV : 4.04165E-02 ( -0.0170507 0.0353538 )
------------------------------------------------------------
# Chi-Squared = 57.92 using 59 PHA bins.
# Reduced chi-squared = 1.053 for 55 degrees of freedom
# Null hypothesis probability = 3.682111e-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] : 12.8080 (-1.12938 1.27823)
R^2/D10^2 : 0.587777 (-0.172549 0.236044)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 98.62 using 59 PHA bins.
# Reduced chi-squared = 1.730 for 57 degrees of freedom
# Null hypothesis probability = 5.198368e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.045e-08 2.600e-09
25- 50 6.931e-08 6.335e-09
50-150 7.125e-08 1.129e-08
15-150 1.610e-07 1.430e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 145.126 (5.09034 -100.858)
Norm : 12.6202 (-1.05181 1.15093)
------------------------------------------------------------
# Chi-Squared = 57.94 using 59 PHA bins.
# Reduced chi-squared = 1.016 for 57 degrees of freedom
# Null hypothesis probability = 4.405710e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.250e-08 3.340e-09
25- 50 5.995e-08 5.065e-09
50-150 1.167e-07 1.629e-08
15-150 2.092e-07 2.015e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.07164 (-1.36368 1.39298)
R1^2/D10^2 : 2.23637 (-0.890651 1.81482)
kT2 [keV] : 29.2984 (-6.82075 13.2927)
R2^2/D10^2 : 2.05833E-02 (-0.0140767 0.0351887)
------------------------------------------------------------
# Chi-Squared = 55.23 using 59 PHA bins.
# Reduced chi-squared = 1.004 for 55 degrees of freedom
# Null hypothesis probability = 4.660061e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.932e-08 7.405e-09
25- 50 6.427e-08 1.441e-08
50-150 1.175e-07 5.460e-08
15-150 2.111e-07 7.109e-08
Plot creation:
Thu Aug 2 17:36:35 EDT 2012