batgrbproduct Analysis for Trigger=528552
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 25 15:17:41 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger528552/GCN5_download_cron
======================================================================
Trigger: 00528552 Segment: 000
BAT Trigger Time: 364892160 [s; MET]
Trigger Stop: 364893464 [s; MET]
UTC: 2012-07-25T06:55:50.536500 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 287.575268841606 Dec: -5.78161701750775 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 7.71
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.71
Flight Position: [ source = BAT ]
RA: 287.575268841606 Dec: -5.78161701750775 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 287.598993908923 Dec: -5.81215677030105 [deg; J2000]
{ 19h 10m 23.8s , -05d 48' 43.8" }
+/- 2.66903009487793 [arcmin] (estimated 90% radius based on SNR)
+/- 1.88326021710691 [arcmin] (formal 1-sigma fit error)
SNR: 7.48241846726364
Angular difference between Flight and Ground position is 2.315886 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 1304 +/-
Measured from: 0
to: 1304 [s; relative to TRIGTIME]
T50: 1304 +/-
Measured from: 0
to: 1304 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 1304 second)
Measured from: 0
to: 1304 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 1304 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.345303 1.349590 0.747098 0.238439
0.156540 0.149734 0.127167 0.108935 [error]
Peak 1.345303 1.349590 0.747098 0.238439
0.156540 0.149734 0.127167 0.108935 [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 3.92e-07 5.21e-07 5.09e-07 8.90e-07 1.71e-06 2.31e-06 erg/cm2
Error 6.73e-08 6.59e-08 1.17e-07 4.04e-07 2.67e-07 5.37e-07 erg/cm2
Peak flux Power-law 1.34e-02 9.88e-03 4.82e-03 3.34e-03 2.97e-02 3.15e-02 ph/cm2/s
Error 2.36e-03 1.23e-03 1.07e-03 1.41e-03 3.67e-03 3.96e-03 ph/cm2/s
Fluence Cutoff-PL 3.89e-07 5.32e-07 5.02e-07 6.38e-07 2.06e-06 0.00e+00 erg/cm2
Error 7.02e-08 8.13e-08 1.31e-07 6.67e-07 7.36e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.33e-02 1.01e-02 4.78e-03 2.57e-03 2.95e-02 3.07e-02 ph/cm2/s
Error 2.48e-03 1.51e-03 1.17e-03 2.75e-03 3.77e-03 4.60e-03 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 1.18e-02 1.14e-02 3.80e-03 2.85e-02 0.00e+00 0.00e+00 ph/cm2/s
Error 3.00e-03 2.16e-03 4.61e-03 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 2.034 0.245 - - 1.95e-04 3.25e-05 83.520 57
CPL 1.882 0.608 30.5 0.0 2.41e-04 0.00e+00 83.420 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.034 0.245 - - 1.95e-04 3.25e-05 83.520 57
CPL 1.882 0.608 30.5 0.0 2.41e-04 0.00e+00 83.420 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 1304.000 0.000 1304.000
T90 1304.000 0.000 1304.000
T50 1304.000 0.000 1304.000
Peak 1304.000 0.000 1304.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
287.5990 -5.8122 0.0257 6.4 151.3 3.5491 7.5 TRIG_00528552
------------------------------------------
Foreground time interval of the image:
0.000 33.069 (delta_t = 33.069 [sec])
43.000 828.540 (delta_t = 785.540 [sec])
830.000 963.024 (delta_t = 133.024 [sec])
Background time interval of the image:
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
Multiple GTIs in the spectrum
tstart tstop
0.000000 33.068600
43.000000 828.540000
830.000000 963.023700
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.03428 ( -0.237528 0.253078 )
Norm@50keV : 1.94985E-04 ( -3.29062e-05 3.20221e-05 )
------------------------------------------------------------
# Chi-Squared = 83.52 using 59 PHA bins.
# Reduced chi-squared = 1.465 for 57 degrees of freedom
# Null hypothesis probability = 1.259582e-02
Photon flux (15-150 keV) in 951.6 sec: 2.97183E-02 ( -0.00367204 0.00367215 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.71463e-06 ( -2.62578e-07 2.71255e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 33.068600
43.000000 828.540000
830.000000 963.023700
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.88221 ( -1.00026 0.214815 )
Epeak [keV] : 30.5282 ( )
Norm@50keV : 2.40857E-04 ( )
------------------------------------------------------------
# Chi-Squared = 83.42 using 59 PHA bins.
# Reduced chi-squared = 1.490 for 56 degrees of freedom
# Null hypothesis probability = 1.017462e-02
Photon flux (15-150 keV) in 951.6 sec: 2.95355E-02 ( -0.0037886 0.0037542 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.06102e-06 ( -6.58507e-07 8.14151e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 33.068600
43.000000 828.540000
830.000000 963.023700
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99267 ( -262.685 -262.685 )
beta : -2.20016 ( -0.351177 0.29522 )
Epeak [keV] : 21.6850 ( -21.6845 5.09056 )
Norm@50keV : 84.8717 ( -84.8894 702.667 )
------------------------------------------------------------
# Chi-Squared = 81.39 using 59 PHA bins.
# Reduced chi-squared = 1.480 for 55 degrees of freedom
# Null hypothesis probability = 1.191283e-02
Photon flux (15-150 keV) in 951.6 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] : 8.08802 (-1.17836 1.5055)
R^2/D10^2 : 3.06178E-02 (-0.0150015 0.027015)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 98.72 using 59 PHA bins.
# Reduced chi-squared = 1.732 for 57 degrees of freedom
# Null hypothesis probability = 5.069139e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.474e-07 8.293e-08
25- 50 6.197e-07 1.143e-07
50-150 1.687e-07 6.819e-08
15-150 1.136e-06 2.148e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 59.7942 (-19.8746 37.2744)
Norm : 0.155200 (-0.0313243 0.0408489)
------------------------------------------------------------
# Chi-Squared = 84.37 using 59 PHA bins.
# Reduced chi-squared = 1.480 for 57 degrees of freedom
# Null hypothesis probability = 1.072760e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.710e-07 5.957e-08
25- 50 5.640e-07 8.479e-08
50-150 6.399e-07 2.598e-07
15-150 1.575e-06 2.788e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.83164 (-1.10524 1.23194)
R1^2/D10^2 : 9.11089E-02 (-0.047967 0.084149)
kT2 [keV] : 24.8601 (-8.07728 20.5562)
R2^2/D10^2 : 2.96182E-04 (-0.00025182 0.000955649)
------------------------------------------------------------
# Chi-Squared = 78.95 using 59 PHA bins.
# Reduced chi-squared = 1.435 for 55 degrees of freedom
# Null hypothesis probability = 1.883057e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.060e-07 1.640e-07
25- 50 5.236e-07 2.066e-07
50-150 8.160e-07 4.943e-07
15-150 1.746e-06 7.618e-07
Peak spectrum fit
Power-law model
Time interval is from 830.000 sec. to 963.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.03428 ( -0.237528 0.253078 )
Norm@50keV : 1.94985E-04 ( -3.29062e-05 3.20221e-05 )
------------------------------------------------------------
# Chi-Squared = 83.52 using 59 PHA bins.
# Reduced chi-squared = 1.465 for 57 degrees of freedom
# Null hypothesis probability = 1.259582e-02
Photon flux (15-150 keV) in 951.6 sec: 2.97183E-02 ( -0.00367204 0.00367215 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.71463e-06 ( -2.62578e-07 2.71255e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 830.000 sec. to 963.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.88221 ( -1.00026 0.214815 )
Epeak [keV] : 30.5282 ( )
Norm@50keV : 2.40857E-04 ( )
------------------------------------------------------------
# Chi-Squared = 83.42 using 59 PHA bins.
# Reduced chi-squared = 1.490 for 56 degrees of freedom
# Null hypothesis probability = 1.017462e-02
Photon flux (15-150 keV) in 951.6 sec: 2.95355E-02 ( -0.0037886 0.0037542 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.06102e-06 ( -6.58507e-07 8.14151e-07 ) ergs/cm2
Band function
Time interval is from 830.000 sec. to 963.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99267 ( -262.685 -262.685 )
beta : -2.20016 ( -0.351177 0.29522 )
Epeak [keV] : 21.6850 ( -21.6845 5.09056 )
Norm@50keV : 84.8717 ( -84.8894 2068.68 )
------------------------------------------------------------
# Chi-Squared = 81.39 using 59 PHA bins.
# Reduced chi-squared = 1.480 for 55 degrees of freedom
# Null hypothesis probability = 1.191283e-02
Photon flux (15-150 keV) in 951.6 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] : 8.08802 (-1.17836 1.5055)
R^2/D10^2 : 3.06178E-02 (-0.0150015 0.027015)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 98.72 using 59 PHA bins.
# Reduced chi-squared = 1.732 for 57 degrees of freedom
# Null hypothesis probability = 5.069139e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.474e-07 7.913e-08
25- 50 6.197e-07 1.152e-07
50-150 1.687e-07 6.592e-08
15-150 1.136e-06 2.047e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 59.7942 (-19.8746 37.2744)
Norm : 0.155200 (-0.0313243 0.0408489)
------------------------------------------------------------
# Chi-Squared = 84.37 using 59 PHA bins.
# Reduced chi-squared = 1.480 for 57 degrees of freedom
# Null hypothesis probability = 1.072760e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.710e-07 6.257e-08
25- 50 5.640e-07 8.550e-08
50-150 6.399e-07 2.271e-07
15-150 1.575e-06 3.335e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.83164 (-1.10524 1.23194)
R1^2/D10^2 : 9.11089E-02 (-0.047967 0.084149)
kT2 [keV] : 24.8601 (-8.07728 20.5562)
R2^2/D10^2 : 2.96182E-04 (-0.00025182 0.000955649)
------------------------------------------------------------
# Chi-Squared = 78.95 using 59 PHA bins.
# Reduced chi-squared = 1.435 for 55 degrees of freedom
# Null hypothesis probability = 1.883057e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.060e-07 1.664e-07
25- 50 5.236e-07 2.284e-07
50-150 8.160e-07 4.708e-07
15-150 1.746e-06 7.747e-07
Plot creation:
Wed Jul 25 15:31:23 EDT 2012