batgrbproduct Analysis for Trigger=539866
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): Wed Nov 28 23:38:37 EST 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger539866/GCN5_download_cron
======================================================================
Trigger: 00539866 Segment: 000
BAT Trigger Time: 375771947.136 [s; MET]
Trigger Stop: 375771948.16 [s; MET]
UTC: 2012-11-28T05:05:37.212960 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 300.582775438788 Dec: 54.3214660612968 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.3
Image Trigger?: NO
Rate S/N Ratio: 9.79795897113271 [ if not an image trigger ]
Image S/N Ratio: 7.3
Flight Position: [ source = BAT ]
RA: 300.582775438788 Dec: 54.3214660612968 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 300.587585951505 Dec: 54.3003957304509 [deg; J2000]
{ 20h 02m 21.0s , +54d 18' 01.4" }
+/- 0.687881326386161 [arcmin] (estimated 90% radius based on SNR)
+/- 0.175107254629949 [arcmin] (formal 1-sigma fit error)
SNR: 51.9089115914037
Angular difference between Flight and Ground position is 1.275384 arcmin
Partial Coding Fraction: 0.8828125 [ including projection effects ]
Duration
T90: 23.4359999895096 +/- 1.630612160051
Measured from: 13.0880001187325
to: 36.524000108242 [s; relative to TRIGTIME]
T50: 7.40399992465973 +/- 0.445654597849172
Measured from: 17.512000143528
to: 24.9160000681877 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 21.6840000152588
to: 22.6840000152588 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.00399994850158691
to: 41.688000023365 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.402821 4.228983 2.523782 0.401668
0.049631 0.052848 0.046620 0.042127 [error]
Peak 0.339593 0.583649 0.550702 0.101177
0.011305 0.013839 0.013616 0.008794 [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 1.19e-06 1.76e-06 1.93e-06 4.00e-06 6.11e-06 8.89e-06 erg/cm2
Error 4.76e-08 3.98e-08 5.22e-08 2.43e-07 1.26e-07 2.73e-07 erg/cm2
Peak flux Power-law 3.65e+00 4.17e+00 3.42e+00 4.69e+00 1.29e+01 1.59e+01 ph/cm2/s
Error 1.98e-01 1.39e-01 1.09e-01 3.13e-01 3.84e-01 4.58e-01 ph/cm2/s
Fluence Cutoff-PL 1.06e-06 1.81e-06 1.98e-06 2.04e-06 6.89e-06 0.00e+00 erg/cm2
Error 6.21e-08 4.43e-08 5.68e-08 4.14e-07 4.47e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 2.97e+00 4.34e+00 3.74e+00 2.44e+00 1.25e+01 1.35e+01 ph/cm2/s
Error 2.52e-01 1.55e-01 1.41e-01 4.05e-01 4.01e-01 5.81e-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 1.36e+01 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 1.863 0.040 - - 1.59e-02 3.28e-04 62.330 57
CPL 1.320 0.183 64.6 6.8 2.89e-02 5.75e-03 33.620 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.287 0.048 - - 1.09e-01 3.07e-03 81.200 57
CPL 0.494 0.225 107.7 16.2 2.47e-01 5.65e-02 38.730 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: 18.368000 sec.
T50 in the 50-300 keV band: 5.760000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 41.692 -0.004 41.688
T90 23.436 13.088 36.524
T50 7.404 17.512 24.916
Peak 1.000 21.684 22.684
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
300.5876 +54.3004 0.0037 24.6 175.5 3.8286 51.9 TRIG_00539866
------------------------------------------
Foreground time interval of the image:
-0.004 19.465 (delta_t = 19.469 [sec])
Background time interval of the image:
-239.136 -66.486 (delta_t = 172.650 [sec])
-65.136 -0.004 (delta_t = 65.132 [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 -0.004 sec. to 41.688 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.86286 ( -0.0400978 0.0402204 )
Norm@50keV : 1.59343E-02 ( -0.000328557 0.000328356 )
------------------------------------------------------------
# Chi-Squared = 62.33 using 59 PHA bins.
# Reduced chi-squared = 1.093 for 57 degrees of freedom
# Null hypothesis probability = 2.925190e-01
Photon flux (15-150 keV) in 41.69 sec: 2.25153 ( -0.0539243 0.0541725 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.10725e-06 ( -1.26199e-07 1.26273e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.004 sec. to 41.688 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.32014 ( -0.186444 0.179143 )
Epeak [keV] : 64.5938 ( -5.32768 8.30591 )
Norm@50keV : 2.89123E-02 ( -0.00506059 0.00643488 )
------------------------------------------------------------
# Chi-Squared = 33.62 using 59 PHA bins.
# Reduced chi-squared = 0.6004 for 56 degrees of freedom
# Null hypothesis probability = 9.922989e-01
Photon flux (15-150 keV) in 41.69 sec: 2.14123 ( -0.06266 0.06318 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.88752e-06 ( -4.02475e-07 4.92192e-07 ) ergs/cm2
Band function
Time interval is from -0.004 sec. to 41.688 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.03141 ( -0.380414 0.685566 )
beta : -2.14649 ( 2.14649 0.139602 )
Epeak [keV] : 53.7637 ( -11.7561 13.9375 )
Norm@50keV : 4.24206E-02 ( -0.0160898 0.0727924 )
------------------------------------------------------------
# Chi-Squared = 31.19 using 59 PHA bins.
# Reduced chi-squared = 0.5671 for 55 degrees of freedom
# Null hypothesis probability = 9.959943e-01
Photon flux (15-150 keV) in 41.69 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] : 13.5909 ( )
R^2/D10^2 : 0.314596 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 410.72 using 59 PHA bins.
# Reduced chi-squared = 7.2056 for 57 degrees of freedom
# Null hypothesis probability = 5.145303e-55
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.130e-07 2.084e-08
25- 50 1.851e-06 4.753e-08
50-150 2.217e-06 9.193e-08
15-150 4.581e-06 9.797e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 101.168 (-6.26242 10.0169)
Norm : 9.61006 (-0.33157 0.336421)
------------------------------------------------------------
# Chi-Squared = 33.36 using 59 PHA bins.
# Reduced chi-squared = 0.5852 for 57 degrees of freedom
# Null hypothesis probability = 9.947828e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.047e-06 3.419e-08
25- 50 1.815e-06 4.086e-08
50-150 2.961e-06 2.124e-07
15-150 5.823e-06 2.210e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.32503 (-0.611946 0.637134)
R1^2/D10^2 : 2.08142 (-0.501356 0.73338)
kT2 [keV] : 22.9421 (-1.90004 2.43968)
R2^2/D10^2 : 3.19172E-02 (-0.0107813 0.0139114)
------------------------------------------------------------
# Chi-Squared = 43.54 using 59 PHA bins.
# Reduced chi-squared = 0.7916 for 55 degrees of freedom
# Null hypothesis probability = 8.675321e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.092e-07 6.066e-08
25- 50 1.856e-06 8.109e-08
50-150 2.934e-06 1.922e-07
15-150 5.700e-06 2.814e-07
Peak spectrum fit
Power-law model
Time interval is from 21.684 sec. to 22.684 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.28652 ( -0.0478857 0.0478973 )
Norm@50keV : 0.108719 ( -0.00306511 0.00306503 )
------------------------------------------------------------
# Chi-Squared = 81.20 using 59 PHA bins.
# Reduced chi-squared = 1.425 for 57 degrees of freedom
# Null hypothesis probability = 1.930739e-02
Photon flux (15-150 keV) in 1 sec: 12.9387 ( -0.383968 0.384529 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.07792e-06 ( -3.26181e-08 3.26616e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 21.684 sec. to 22.684 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.494071 ( -0.2298 0.219237 )
Epeak [keV] : 107.655 ( -12.3495 19.9684 )
Norm@50keV : 0.246999 ( -0.0489251 0.0641649 )
------------------------------------------------------------
# Chi-Squared = 38.73 using 59 PHA bins.
# Reduced chi-squared = 0.6916 for 56 degrees of freedom
# Null hypothesis probability = 9.619243e-01
Photon flux (15-150 keV) in 1 sec: 12.4623 ( -0.4003 0.4016 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.37722e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from 21.684 sec. to 22.684 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.494010 ( -0.17865 0.221505 )
beta : -10.00000 ( 2.02657e+10 2.02657e+10 )
Epeak [keV] : 107.636 ( -12.3485 19.9657 )
Norm@50keV : 0.247014 ( -0.0489404 0.0641957 )
------------------------------------------------------------
# Chi-Squared = 38.73 using 59 PHA bins.
# Reduced chi-squared = 0.7042 for 55 degrees of freedom
# Null hypothesis probability = 9.527707e-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] : 18.6921 ( )
R^2/D10^2 : 0.749518 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 173.90 using 59 PHA bins.
# Reduced chi-squared = 3.0508 for 57 degrees of freedom
# Null hypothesis probability = 9.370990e-14
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.177e-08 2.900e-09
25- 50 2.462e-07 1.000e-08
50-150 6.299e-07 3.040e-08
15-150 9.278e-07 3.070e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 54.4083 ( )
------------------------------------------------------------
# Chi-Squared = 153.02 using 59 PHA bins.
# Reduced chi-squared = 2.6846 for 57 degrees of freedom
# Null hypothesis probability = 1.008940e-10
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.355e-07 6.880e-08
25- 50 2.606e-07 1.331e-07
50-150 5.716e-07 2.915e-07
15-150 9.677e-07 4.944e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.07986 (-1.28586 1.45313)
R1^2/D10^2 : 5.59057 (-2.05567 3.95923)
kT2 [keV] : 26.0615 (-2.29489 3.3146)
R2^2/D10^2 : 0.199541 (-0.0749994 0.0868785)
------------------------------------------------------------
# Chi-Squared = 41.41 using 59 PHA bins.
# Reduced chi-squared = 0.7529 for 55 degrees of freedom
# Null hypothesis probability = 9.124744e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.950e-08 1.012e-08
25- 50 2.517e-07 1.995e-08
50-150 6.989e-07 5.655e-08
15-150 1.040e-06 7.840e-08
Plot creation:
Thu Nov 29 00:05:52 EST 2012