batgrbproduct Analysis for Trigger=530588
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): Sat Aug 11 13:20:55 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger530588/GCN5_download_cron
======================================================================
Trigger: 00530588 Segment: 000
BAT Trigger Time: 366353043.328 [s; MET]
Trigger Stop: 366353047.424 [s; MET]
UTC: 2012-08-11T04:43:53.803660 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 266.257500459977 Dec: -28.8524616562762 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 7.46
Image Trigger?: NO
Rate S/N Ratio: 13.856406460551 [ if not an image trigger ]
Image S/N Ratio: 7.46
Flight Position: [ source = BAT ]
RA: 266.257500459977 Dec: -28.8524616562762 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 266.276659041985 Dec: -28.8276636683738 [deg; J2000]
{ 17h 45m 06.4s , -28d 49' 39.6" }
+/- 2.82587966223358 [arcmin] (estimated 90% radius based on SNR)
+/- 1.41985614316974 [arcmin] (formal 1-sigma fit error)
SNR: 6.89625236560265
Angular difference between Flight and Ground position is 1.796584 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 69.6320000290871 +/- 16.7808195477138
Measured from: -48.0319998860359
to: 21.6000001430511 [s; relative to TRIGTIME]
T50: 27.5199999809265 +/- 12.2037109383377
Measured from: -22.4959998726845
to: 5.02400010824203 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 3.27599996328354
to: 4.27599996328354 [s; relative to TRIGTIME]
Total Fluence
Measured from: -49.5680000185966
to: 27.4879999756813 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.957026 0.067347 0.002644 -0.001717
0.052391 0.046005 0.039385 0.035726 [error]
Peak 0.043119 0.008987 0.001733 -0.002164
0.006388 0.005323 0.004460 0.004041 [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 2.65e-07 3.58e-08 2.14e-09 1.36e-10 3.03e-07 3.03e-07 erg/cm2
Error 3.70e-08 1.44e-08 2.02e-09 2.52e-10 4.50e-08 4.50e-08 erg/cm2
Peak flux Power-law 3.96e-01 1.03e-01 1.41e-02 2.18e-03 5.15e-01 5.15e-01 ph/cm2/s
Error 9.77e-02 4.84e-02 1.67e-02 4.60e-03 1.29e-01 1.30e-01 ph/cm2/s
Fluence Cutoff-PL 2.83e-07 1.66e-08 3.49e-12 2.94e-20 2.99e-07 0.00e+00 erg/cm2
Error 4.16e-08 1.96e-08 8.11e-10 0.00e+00 4.17e-08 0.00e+00 erg/cm2
Peak flux Cutoff-PL 4.28e-01 8.09e-02 1.80e-04 1.05e-10 5.09e-01 5.09e-01 ph/cm2/s
Error 1.08e-01 5.61e-02 1.21e-02 0.00e+00 1.22e-01 1.22e-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 6.061 0.704 - - 3.00e-05 2.29e-05 57.190 57
CPL 1.000 0.000 50.0 0.0 9.08e-04 0.00e+00 173.770 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.867 0.879 - - 9.37e-04 7.68e-04 41.330 57
CPL 1.000 0.000 50.0 0.0 7.66e-03 0.00e+00 66.580 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 77.056 -49.568 27.488
T90 69.632 -48.032 21.600
T50 27.520 -22.496 5.024
Peak 1.000 3.276 4.276
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
266.2767 -28.8277 0.0278 0.2 -17.6 1.0277 6.9 TRIG_00530588
------------------------------------------
Foreground time interval of the image:
-49.568 27.488 (delta_t = 77.056 [sec])
Background time interval of the image:
-92.027 -49.568 (delta_t = 42.459 [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 -49.568 sec. to 27.488 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 6.06069 ( -0.672638 0.735452 )
Norm@50keV : 3.00041E-05 ( -1.64983e-05 2.93352e-05 )
------------------------------------------------------------
# Chi-Squared = 57.19 using 59 PHA bins.
# Reduced chi-squared = 1.003 for 57 degrees of freedom
# Null hypothesis probability = 4.680965e-01
Photon flux (15-150 keV) in 77.06 sec: 0.131239 ( -0.0184597 0.0184642 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.0284e-07 ( -4.4795e-08 4.52279e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -49.568 sec. to 27.488 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 9.07774E-04 ( )
------------------------------------------------------------
# Chi-Squared = 173.77 using 59 PHA bins.
# Reduced chi-squared = 3.1030 for 56 degrees of freedom
# Null hypothesis probability = 5.496101e-14
Photon flux (15-150 keV) in 77.06 sec: 0.134073 ( -0.018619 0.018758 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.99377e-07 ( -4.16779e-08 4.17997e-08 ) ergs/cm2
Band function
Time interval is from -49.568 sec. to 27.488 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -8.30257 ( 3.28998 5.49713 )
beta : -6.05932 ( -1.451 -0.042386 )
Epeak [keV] : 566.968 ( -566.968 -566.968 )
Norm@50keV : 4.08373E-03 ( -0.00224816 0.0039813 )
------------------------------------------------------------
# Chi-Squared = 57.19 using 59 PHA bins.
# Reduced chi-squared = 1.040 for 55 degrees of freedom
# Null hypothesis probability = 3.938417e-01
Photon flux (15-150 keV) in 77.06 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] : 2.35401 (-0.272717 0.321522)
R^2/D10^2 : 105.027 (-65.3355 177.91)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 54.06 using 59 PHA bins.
# Reduced chi-squared = 0.9484 for 57 degrees of freedom
# Null hypothesis probability = 5.860904e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.835e-07 1.137e-07
25- 50 1.624e-08 9.829e-09
50-150 2.792e-12 2.904e-12
15-150 2.997e-07 1.137e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.14879 (-0.701386 0.906282)
Norm : 64.1122 (-35.3251 85.5264)
------------------------------------------------------------
# Chi-Squared = 54.36 using 59 PHA bins.
# Reduced chi-squared = 0.9537 for 57 degrees of freedom
# Null hypothesis probability = 5.747316e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.782e-07 1.135e-07
25- 50 2.232e-08 1.089e-08
50-150 4.121e-11 4.103e-11
15-150 3.005e-07 1.238e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.35707 (-0.274729 0.319643)
R1^2/D10^2 : 104.089 (-64.8771 178.877)
kT2 [keV] : 199.363 (-200 -200)
R2^2/D10^2 : 2.15028E-15 (-2.56804e-18 0.000685256)
------------------------------------------------------------
# Chi-Squared = 54.06 using 59 PHA bins.
# Reduced chi-squared = 0.9829 for 55 degrees of freedom
# Null hypothesis probability = 5.105349e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.837e-07 1.564e-07
25- 50 1.634e-08 9.863e-09
50-150 2.849e-12 3.057e-12
15-150 3.001e-07 1.456e-07
Peak spectrum fit
Power-law model
Time interval is from 3.276 sec. to 4.276 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.86704 ( -0.756044 1.00174 )
Norm@50keV : 9.36536E-04 ( -0.000612039 0.00092388 )
------------------------------------------------------------
# Chi-Squared = 41.33 using 59 PHA bins.
# Reduced chi-squared = 0.7251 for 57 degrees of freedom
# Null hypothesis probability = 9.411905e-01
Photon flux (15-150 keV) in 1 sec: 0.514733 ( -0.128813 0.129681 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.87617e-08 ( -5.60579e-09 6.3333e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 3.276 sec. to 4.276 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 7.65750E-03 ( )
------------------------------------------------------------
# Chi-Squared = 66.58 using 59 PHA bins.
# Reduced chi-squared = 1.189 for 56 degrees of freedom
# Null hypothesis probability = 1.574222e-01
Photon flux (15-150 keV) in 1 sec: 0.508983 ( -0.121584 0.122502 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.67352e-08 ( -4.2479e-09 4.2337e-09 ) ergs/cm2
Band function
Time interval is from 3.276 sec. to 4.276 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -7.83514 ( 0.806616 4.89395 )
beta : -3.86701 ( -0.999958 0.756325 )
Epeak [keV] : 12.5653 ( -12.5653 -12.5653 )
Norm@50keV : 0.127292 ( -0.0831874 0.125566 )
------------------------------------------------------------
# Chi-Squared = 41.33 using 59 PHA bins.
# Reduced chi-squared = 0.7515 for 55 degrees of freedom
# Null hypothesis probability = 9.139217e-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] : 3.84671 (-0.786678 0.942296)
R^2/D10^2 : 17.0055 (-17.0055 43.8311)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 39.61 using 59 PHA bins.
# Reduced chi-squared = 0.6949 for 57 degrees of freedom
# Null hypothesis probability = 9.614321e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.276e-08 7.225e-09
25- 50 4.114e-09 2.650e-09
50-150 3.931e-11 3.902e-11
15-150 1.691e-08 1.000e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.21863 (-3.13647 5.46181)
Norm : 21.2651 (-11.9656 36.042)
------------------------------------------------------------
# Chi-Squared = 40.25 using 59 PHA bins.
# Reduced chi-squared = 0.7061 for 57 degrees of freedom
# Null hypothesis probability = 9.546371e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.232e-08 6.915e-09
25- 50 4.739e-09 3.022e-09
50-150 2.585e-10 2.637e-10
15-150 1.732e-08 9.600e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.82474 (-3.82458 0.93051)
R1^2/D10^2 : 17.4587 (-17.466 45.6525)
kT2 [keV] : 199.359 (-199.996 -199.996)
R2^2/D10^2 : 1.32707E-05 (-1.33365e-05 0.00190687)
------------------------------------------------------------
# Chi-Squared = 39.29 using 59 PHA bins.
# Reduced chi-squared = 0.7143 for 55 degrees of freedom
# Null hypothesis probability = 9.457700e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.274e-08 7.215e-09
25- 50 4.180e-09 2.577e-09
50-150 3.551e-09 4.053e-11
15-150 2.047e-08 9.650e-09
Plot creation:
Sat Aug 11 13:42:36 EDT 2012