batgrbproduct Analysis for Trigger=525671
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 Jul 4 20:17:38 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger525671/GCN5_download_cron
======================================================================
Trigger: 00525671 Segment: 000
BAT Trigger Time: 363029131.584 [s; MET]
Trigger Stop: 363029132.096 [s; MET]
UTC: 2012-07-03T17:25:22.198180 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 339.356638623791 Dec: -29.7359171074292 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 20.58
Image Trigger?: NO
Rate S/N Ratio: 83.5044908971967 [ if not an image trigger ]
Image S/N Ratio: 20.58
Flight Position: [ source = BAT ]
RA: 339.356638623791 Dec: -29.7359171074292 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 339.353085017662 Dec: -29.7263633612877 [deg; J2000]
{ 22h 37m 24.7s , -29d 43' 34.9" }
+/- 0.723164292677864 [arcmin] (estimated 90% radius based on SNR)
+/- 0.227600639596238 [arcmin] (formal 1-sigma fit error)
SNR: 48.3290676623856
Angular difference between Flight and Ground position is 0.602384 arcmin
Partial Coding Fraction: 0.5078125 [ including projection effects ]
Duration
T90: 25.2079999446869 +/- 4.28224241823782
Measured from: -5.23599988222122
to: 19.9720000624657 [s; relative to TRIGTIME]
T50: 2.98799991607666 +/- 0.346225382798064
Measured from: -1.01199984550476
to: 1.9760000705719 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.0559999942779541
to: 1.05599999427795 [s; relative to TRIGTIME]
Total Fluence
Measured from: -7.27200001478195
to: 32.6040000319481 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.484796 1.965382 1.617648 0.385636
0.051512 0.054742 0.049403 0.040725 [error]
Peak 0.252967 0.421555 0.470123 0.174015
0.012308 0.015488 0.016508 0.012509 [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 4.84e-07 8.82e-07 1.24e-06 3.62e-06 3.54e-06 6.22e-06 erg/cm2
Error 3.06e-08 3.22e-08 5.11e-08 3.40e-07 1.24e-07 3.70e-07 erg/cm2
Peak flux Power-law 2.47e+00 3.23e+00 3.09e+00 5.26e+00 1.05e+01 1.40e+01 ph/cm2/s
Error 1.94e-01 1.51e-01 1.33e-01 4.99e-01 4.13e-01 5.95e-01 ph/cm2/s
Fluence Cutoff-PL 4.64e-07 8.94e-07 1.25e-06 2.77e-06 5.39e-06 0.00e+00 erg/cm2
Error 3.91e-08 3.56e-08 5.63e-08 8.93e-07 9.01e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 2.46e+00 3.23e+00 3.09e+00 5.22e+00 1.05e+01 1.40e+01 ph/cm2/s
Error 2.21e-01 1.18e-01 1.50e-01 9.01e-01 4.19e-01 5.92e-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 1.514 0.061 - - 9.38e-03 3.06e-04 66.980 57
CPL 1.323 0.234 190.2 -55.8 1.15e-02 2.90e-03 65.140 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.062 0.069 - - 9.11e-02 3.49e-03 65.580 57
CPL 1.053 0.169 5887.9 0.0 9.20e-02 1.60e-02 65.580 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: 9.664000 sec.
T50 in the 50-300 keV band: 1.920000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 39.876 -7.272 32.604
T90 25.208 -5.236 19.972
T50 2.988 -1.012 1.976
Peak 1.000 0.056 1.056
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
339.3531 -29.7264 0.0040 30.4 36.4 4.7016 48.3 TRIG_00525671
------------------------------------------
Foreground time interval of the image:
-7.272 9.317 (delta_t = 16.589 [sec])
Background time interval of the image:
-60.584 -7.272 (delta_t = 53.312 [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 -7.272 sec. to 32.604 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.51355 ( -0.061359 0.0614787 )
Norm@50keV : 9.38040E-03 ( -0.000305976 0.000305804 )
------------------------------------------------------------
# Chi-Squared = 66.98 using 59 PHA bins.
# Reduced chi-squared = 1.175 for 57 degrees of freedom
# Null hypothesis probability = 1.717853e-01
Photon flux (15-150 keV) in 39.88 sec: 1.17536 ( -0.041274 0.0413837 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.54108e-06 ( -1.23568e-07 1.23851e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -7.272 sec. to 32.604 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.32270 ( -0.252158 0.214924 )
Epeak [keV] : 190.247 ( -78.6301 -190.247 )
Norm@50keV : 1.15303E-02 ( -0.00229873 0.00350452 )
------------------------------------------------------------
# Chi-Squared = 65.14 using 59 PHA bins.
# Reduced chi-squared = 1.163 for 56 degrees of freedom
# Null hypothesis probability = 1.886076e-01
Photon flux (15-150 keV) in 39.88 sec: 1.15966 ( -0.04536 0.0454 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.38528e-06 ( -7.68847e-07 1.03357e-06 ) ergs/cm2
Band function
Time interval is from -7.272 sec. to 32.604 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.25070 ( 1.25437 1.91597 )
beta : -1.65900 ( 1.66126 0.179227 )
Epeak [keV] : 142.747 ( -146.42 -146.42 )
Norm@50keV : 1.26203E-02 ( -0.00313296 836.047 )
------------------------------------------------------------
# Chi-Squared = 64.90 using 59 PHA bins.
# Reduced chi-squared = 1.180 for 55 degrees of freedom
# Null hypothesis probability = 1.698182e-01
Photon flux (15-150 keV) in 39.88 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] : 16.2142 ( )
R^2/D10^2 : 9.79626E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 255.11 using 59 PHA bins.
# Reduced chi-squared = 4.4756 for 57 degrees of freedom
# Null hypothesis probability = 7.179474e-27
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.117e-07 1.390e-08
25- 50 9.010e-07 4.008e-08
50-150 1.664e-06 9.771e-08
15-150 2.777e-06 1.063e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.990 ( )
Norm : 4.79946 (-4.79946 -4.79946)
------------------------------------------------------------
# Chi-Squared = 68.88 using 59 PHA bins.
# Reduced chi-squared = 1.208 for 57 degrees of freedom
# Null hypothesis probability = 1.345559e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.766e-07 2.425e-07
25- 50 9.169e-07 4.668e-07
50-150 2.011e-06 1.029e-06
15-150 3.405e-06 1.728e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.77490 (-0.938895 1.09548)
R1^2/D10^2 : 1.28178 (-0.505025 0.931282)
kT2 [keV] : 25.5279 (-2.6739 3.85703)
R2^2/D10^2 : 1.65521E-02 (-0.00664606 0.00846573)
------------------------------------------------------------
# Chi-Squared = 75.09 using 59 PHA bins.
# Reduced chi-squared = 1.365 for 55 degrees of freedom
# Null hypothesis probability = 3.719999e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.378e-07 5.587e-08
25- 50 8.910e-07 7.458e-08
50-150 2.109e-06 1.878e-07
15-150 3.438e-06 2.518e-07
Peak spectrum fit
Power-law model
Time interval is from 0.056 sec. to 1.056 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.06227 ( -0.0687307 0.0684087 )
Norm@50keV : 9.10777E-02 ( -0.00348983 0.0034878 )
------------------------------------------------------------
# Chi-Squared = 65.58 using 59 PHA bins.
# Reduced chi-squared = 1.151 for 57 degrees of freedom
# Null hypothesis probability = 2.036953e-01
Photon flux (15-150 keV) in 1 sec: 10.5292 ( -0.412489 0.412794 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.64028e-07 ( -4.11528e-08 4.13383e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.056 sec. to 1.056 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.05302 ( -0.265226 0.0725954 )
Epeak [keV] : 5887.91 ( -1001.14 -1001.14 )
Norm@50keV : 9.19692E-02 ( -0.00376078 0.028183 )
------------------------------------------------------------
# Chi-Squared = 65.58 using 59 PHA bins.
# Reduced chi-squared = 1.171 for 56 degrees of freedom
# Null hypothesis probability = 1.787056e-01
Photon flux (15-150 keV) in 1 sec: 10.5259 ( -0.4268 0.4115 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.26818e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.056 sec. to 1.056 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.79651 ( -3.04178 -3.04178 )
beta : -1.08982 ( -0.0806696 0.0786006 )
Epeak [keV] : 28.6008 ( -27.103 155.911 )
Norm@50keV : 88.9953 ( -88.8654 1907.14 )
------------------------------------------------------------
# Chi-Squared = 64.05 using 59 PHA bins.
# Reduced chi-squared = 1.165 for 55 degrees of freedom
# Null hypothesis probability = 1.887745e-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] : 21.2571 ( )
R^2/D10^2 : 0.412209 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 205.89 using 59 PHA bins.
# Reduced chi-squared = 3.6121 for 57 degrees of freedom
# Null hypothesis probability = 1.030073e-18
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.501e-08 2.550e-09
25- 50 1.813e-07 1.010e-08
50-150 6.111e-07 3.655e-08
15-150 8.274e-07 3.940e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 42.7647 ( )
------------------------------------------------------------
# Chi-Squared = 204.87 using 59 PHA bins.
# Reduced chi-squared = 3.5941 for 57 degrees of freedom
# Null hypothesis probability = 1.499950e-18
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.065e-07 5.465e-08
25- 50 2.048e-07 1.053e-07
50-150 4.493e-07 2.299e-07
15-150 7.606e-07 3.922e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.26541 (-1.33841 1.60705)
R1^2/D10^2 : 4.79285 (-1.94078 3.62442)
kT2 [keV] : 36.8025 (-5.38595 9.42067)
R2^2/D10^2 : 6.38174E-02 (-0.03128 0.0413762)
------------------------------------------------------------
# Chi-Squared = 69.04 using 59 PHA bins.
# Reduced chi-squared = 1.255 for 55 degrees of freedom
# Null hypothesis probability = 9.652697e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.243e-08 1.029e-08
25- 50 1.908e-07 2.085e-08
50-150 7.081e-07 9.980e-08
15-150 9.713e-07 1.254e-07
Plot creation:
Wed Jul 4 20:25:04 EDT 2012