batgrbproduct Analysis for Trigger=530808
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 Aug 14 01:02:47 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger530808/GCN5_download_cron
======================================================================
Trigger: 00530808 Segment: 000
BAT Trigger Time: 366542023.808 [s; MET]
Trigger Stop: 366542025.856 [s; MET]
UTC: 2012-08-13T09:13:34.275800 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 267.08831294264 Dec: -24.7715695901544 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.67
Image Trigger?: NO
Rate S/N Ratio: 9.79795897113271 [ if not an image trigger ]
Image S/N Ratio: 6.67
Flight Position: [ source = BAT ]
RA: 267.08831294264 Dec: -24.7715695901544 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 267.047952156264 Dec: -24.7790110588198 [deg; J2000]
{ 17h 48m 11.5s , -24d 46' 44.4" }
+/- 3.4226585851764 [arcmin] (estimated 90% radius based on SNR)
+/- 1.4215726898963 [arcmin] (formal 1-sigma fit error)
SNR: 5.24495585652691
Angular difference between Flight and Ground position is 2.243630 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 7.04000002145767 +/- 3.24953658437378
Measured from: -2.49599993228912
to: 4.54400008916855 [s; relative to TRIGTIME]
T50: 2.36800003051758 +/- 3.02090845511165
Measured from: -0.63999992609024
to: 1.72800010442734 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.555999994277954
to: 1.55599999427795 [s; relative to TRIGTIME]
Total Fluence
Measured from: -2.68800002336502
to: 4.79999995231628 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.125915 0.024968 0.006399 0.007824
0.016000 0.013895 0.011863 0.010812 [error]
Peak 0.042677 -0.000827 0.002049 0.001072
0.006093 0.005107 0.004220 0.004023 [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 3.70e-08 1.26e-08 2.43e-09 5.48e-10 5.24e-08 5.26e-08 erg/cm2
Error 7.73e-09 7.35e-09 3.64e-09 1.73e-09 1.52e-08 1.57e-08 erg/cm2
Peak flux Power-law 3.67e-01 5.72e-02 4.11e-03 3.16e-04 4.28e-01 4.29e-01 ph/cm2/s
Error 9.43e-02 3.95e-02 7.37e-03 1.24e-03 1.22e-01 1.22e-01 ph/cm2/s
Fluence Cutoff-PL 3.70e-08 1.26e-08 2.41e-09 5.41e-10 5.26e-08 0.00e+00 erg/cm2
Error 7.72e-09 1.03e-08 3.70e-09 1.70e-09 1.57e-08 0.00e+00 erg/cm2
Peak flux Cutoff-PL 4.36e-01 2.39e-02 1.85e-07 2.70e-20 4.60e-01 4.61e-01 ph/cm2/s
Error 1.06e-01 2.26e-02 6.96e-05 0.00e+00 1.13e-01 1.13e-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 4.378 1.053 - - 2.38e-04 2.47e-04 69.780 57
CPL 1.732 0.000 1.9 0.0 4.75e-02 0.00e+00 70.990 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 4.796 1.212 - - 3.37e-04 4.79e-04 55.560 57
CPL 1.000 0.000 50.0 0.0 5.93e-03 0.00e+00 82.790 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 7.488 -2.688 4.800
T90 7.040 -2.496 4.544
T50 2.368 -0.640 1.728
Peak 1.000 0.556 1.556
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
267.0480 -24.7790 0.0368 7.9 14.1 0.1463 5.2 TRIG_00530808
------------------------------------------
Foreground time interval of the image:
-2.688 4.800 (delta_t = 7.488 [sec])
Background time interval of the image:
-141.307 -2.688 (delta_t = 138.619 [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 -2.688 sec. to 4.800 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.37838 ( -0.917783 1.1878 )
Norm@50keV : 2.38157E-04 ( -0.000171317 0.000323681 )
------------------------------------------------------------
# Chi-Squared = 69.78 using 59 PHA bins.
# Reduced chi-squared = 1.224 for 57 degrees of freedom
# Null hypothesis probability = 1.192090e-01
Photon flux (15-150 keV) in 7.488 sec: 0.205795 ( -0.0457715 0.0459796 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.24024e-08 ( -1.41349e-08 1.61943e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -2.688 sec. to 4.800 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.73182 ( )
Epeak [keV] : 1.90318 ( )
Norm@50keV : 4.74975E-02 ( )
------------------------------------------------------------
# Chi-Squared = 70.99 using 59 PHA bins.
# Reduced chi-squared = 1.268 for 56 degrees of freedom
# Null hypothesis probability = 8.554821e-02
Photon flux (15-150 keV) in 7.488 sec: 0.205827 ( -0.04593 0.045725 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.25551e-08 ( -1.43239e-08 1.70419e-08 ) ergs/cm2
Band function
Time interval is from -2.688 sec. to 4.800 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.01989 ( 0.600077 7.47323 )
beta : -4.37918 ( -1.18665 0.917784 )
Epeak [keV] : 209.993 ( -209.993 -209.993 )
Norm@50keV : 3.23430E-02 ( -0.0232847 0.0439938 )
------------------------------------------------------------
# Chi-Squared = 69.78 using 59 PHA bins.
# Reduced chi-squared = 1.269 for 55 degrees of freedom
# Null hypothesis probability = 8.661253e-02
Photon flux (15-150 keV) in 7.488 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] : 2.91442 (-0.597024 0.773491)
R^2/D10^2 : 33.5727 (-33.5739 123.684)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 71.47 using 59 PHA bins.
# Reduced chi-squared = 1.254 for 57 degrees of freedom
# Null hypothesis probability = 9.397542e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.918e-08 2.222e-08
25- 50 5.155e-09 3.278e-09
50-150 6.542e-12 7.619e-12
15-150 4.434e-08 2.545e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.29215 (-2.06468 4.02417)
Norm : 21.5233 (-21.5238 57.8936)
------------------------------------------------------------
# Chi-Squared = 71.07 using 59 PHA bins.
# Reduced chi-squared = 1.247 for 57 degrees of freedom
# Null hypothesis probability = 9.964094e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.832e-08 2.133e-08
25- 50 7.818e-09 5.316e-09
50-150 1.147e-10 1.224e-10
15-150 4.625e-08 2.644e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.53792 (-0.642022 0.746212)
R1^2/D10^2 : 74.0362 (-59.3934 534.228)
kT2 [keV] : 11.9549 (-5.97367 15.3942)
R2^2/D10^2 : 1.60945E-02 (-0.0154711 0.0847215)
------------------------------------------------------------
# Chi-Squared = 67.13 using 59 PHA bins.
# Reduced chi-squared = 1.221 for 55 degrees of freedom
# Null hypothesis probability = 1.264036e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.754e-08 2.052e-08
25- 50 1.406e-08 8.360e-09
50-150 9.782e-09 7.492e-09
15-150 6.138e-08 3.049e-08
Peak spectrum fit
Power-law model
Time interval is from 0.556 sec. to 1.556 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.79639 ( -1.05192 1.37113 )
Norm@50keV : 3.36762E-04 ( -0.000336628 0.000621925 )
------------------------------------------------------------
# Chi-Squared = 55.56 using 59 PHA bins.
# Reduced chi-squared = 0.9747 for 57 degrees of freedom
# Null hypothesis probability = 5.293495e-01
Photon flux (15-150 keV) in 1 sec: 0.428428 ( -0.120626 0.122549 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.39559e-08 ( -4.50567e-09 5.15852e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.556 sec. to 1.556 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 5.92820E-03 ( )
------------------------------------------------------------
# Chi-Squared = 82.79 using 59 PHA bins.
# Reduced chi-squared = 1.478 for 56 degrees of freedom
# Null hypothesis probability = 1.149525e-02
Photon flux (15-150 keV) in 1 sec: 0.460349 ( -0.11286 0.113089 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.38276e-08 ( -3.4687e-09 3.4813e-09 ) ergs/cm2
Band function
Time interval is from 0.556 sec. to 1.556 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -8.54175 ( 3.28998 5.94609 )
beta : -4.79658 ( -1.37088 1.05223 )
Epeak [keV] : 87.5189 ( -87.5189 -87.5189 )
Norm@50keV : 4.57616E-02 ( -0.0457516 0.0845295 )
------------------------------------------------------------
# Chi-Squared = 55.56 using 59 PHA bins.
# Reduced chi-squared = 1.010 for 55 degrees of freedom
# Null hypothesis probability = 4.536108e-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] : 2.89589 (-0.572585 0.675767)
R^2/D10^2 : 79.7479 (-80.2659 267.241)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 52.68 using 59 PHA bins.
# Reduced chi-squared = 0.9242 for 57 degrees of freedom
# Null hypothesis probability = 6.376807e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.193e-08 6.865e-09
25- 50 1.535e-09 9.625e-10
50-150 1.846e-12 2.126e-12
15-150 1.347e-08 7.690e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 5.66829 (-1.75076 2.83371)
Norm : 64.9490 (-64.949 168.039)
------------------------------------------------------------
# Chi-Squared = 54.01 using 59 PHA bins.
# Reduced chi-squared = 0.9475 for 57 degrees of freedom
# Null hypothesis probability = 5.880134e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.135e-08 6.420e-09
25- 50 1.881e-09 1.223e-09
50-150 1.770e-11 2.177e-11
15-150 1.325e-08 7.595e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.84934 (-0.587497 0.676817)
R1^2/D10^2 : 86.8701 (-87.352 318.133)
kT2 [keV] : 27.4248 (-27.7587 -27.7587)
R2^2/D10^2 : 9.93828E-04 (-0.000976015 -0.000976015)
------------------------------------------------------------
# Chi-Squared = 51.95 using 59 PHA bins.
# Reduced chi-squared = 0.9446 for 55 degrees of freedom
# Null hypothesis probability = 5.918295e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.183e-08 6.645e-09
25- 50 2.152e-09 1.138e-09
50-150 4.007e-09 3.794e-09
15-150 1.799e-08 1.003e-08
Plot creation:
Tue Aug 14 01:22:52 EDT 2012