batgrbproduct Analysis for Trigger=500123
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): Fri Aug 12 12:56:06 EDT 2011
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger500123/GCN5_download_cron
======================================================================
Trigger: 00500123 Segment: 000
BAT Trigger Time: 334838760 [s; MET]
Trigger Stop: 334839128 [s; MET]
UTC: 2011-08-12T10:45:52.747460 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 256.430053502504 Dec: -36.4269431366103 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 10.11
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 10.11
Flight Position: [ source = BAT ]
RA: 256.430053502504 Dec: -36.4269431366103 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 256.474276645024 Dec: -36.4438867539394 [deg; J2000]
{ 17h 05m 53.8s , -36d 26' 38.0" }
+/- 2.75330310525722 [arcmin] (estimated 90% radius based on SNR)
+/- 1.44403113433188 [arcmin] (formal 1-sigma fit error)
SNR: 7.15740327577793
Angular difference between Flight and Ground position is 2.364434 arcmin
Partial Coding Fraction: 0.6796875 [ including projection effects ]
Duration
T90: 368 +/-
Measured from: 0
to: 368 [s; relative to TRIGTIME]
T50: 368 +/-
Measured from: 0
to: 368 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 368 second)
Measured from: 0
to: 368 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 368 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.001861 0.140044 0.013934 -0.032827
0.089928 0.081836 0.070560 0.063741 [error]
Peak 1.001861 0.140044 0.013934 -0.032827
0.089928 0.081836 0.070560 0.063741 [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 2.94e-07 6.12e-08 6.36e-09 7.25e-10 3.62e-07 3.62e-07 erg/cm2
Error 5.27e-08 3.66e-08 1.02e-08 2.40e-09 8.07e-08 8.12e-08 erg/cm2
Peak flux Power-law 5.59e-02 6.76e-03 3.51e-04 1.92e-05 6.31e-02 6.31e-02 ph/cm2/s
Error 1.00e-02 3.84e-03 5.46e-04 5.96e-05 1.19e-02 1.19e-02 ph/cm2/s
Fluence Cutoff-PL 2.94e-07 6.11e-08 6.33e-09 7.18e-10 3.62e-07 3.62e-07 erg/cm2
Error 5.25e-08 5.18e-08 1.02e-08 2.36e-09 8.08e-08 6.94e-08 erg/cm2
Peak flux Cutoff-PL 5.59e-02 6.76e-03 3.50e-04 1.90e-05 6.30e-02 6.31e-02 ph/cm2/s
Error 9.99e-03 4.00e-03 5.41e-04 5.87e-05 1.19e-02 1.19e-02 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 5.267 1.039 - - 3.16e-05 4.05e-05 62.900 57
CPL 1.000 0.000 50.0 0.0 8.19e-04 0.00e+00 116.650 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 5.267 1.039 - - 3.16e-05 4.05e-05 62.900 57
CPL 1.000 0.000 50.0 0.0 8.19e-04 0.00e+00 116.650 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 368.000 0.000 368.000
T90 368.000 0.000 368.000
T50 368.000 0.000 368.000
Peak 368.000 0.000 368.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
256.4743 -36.4439 0.0267 21.7 -94.6 1.2606 7.2 TRIG_00500123
------------------------------------------
Foreground time interval of the image:
0.000 183.029 (delta_t = 183.029 [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
Time interval is from 0.000 sec. to 183.029 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.26679 ( -0.948308 1.13019 )
Norm@50keV : 3.16164E-05 ( -3.16164e-05 4.93698e-05 )
------------------------------------------------------------
# Chi-Squared = 62.90 using 59 PHA bins.
# Reduced chi-squared = 1.104 for 57 degrees of freedom
# Null hypothesis probability = 2.753464e-01
Photon flux (15-150 keV) in 183 sec: 6.30629E-02 ( -0.0118664 0.0119109 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.62029e-07 ( -7.79026e-08 8.35809e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 183.029 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 8.19099E-04 ( )
------------------------------------------------------------
# Chi-Squared = 116.65 using 59 PHA bins.
# Reduced chi-squared = 2.0830 for 56 degrees of freedom
# Null hypothesis probability = 3.717881e-06
Photon flux (15-150 keV) in 183 sec: 6.30024E-02 ( -0.0118632 0.0119039 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.61835e-07 ( -7.80495e-08 8.35596e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 183.029 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.24767 ( 6.57997 8.86696 )
beta : -5.26701 ( -1.31306 0.765919 )
Epeak [keV] : 214.684 ( -214.684 -214.684 )
Norm@50keV : 4.29613E-03 ( -0.00429618 0.006711 )
------------------------------------------------------------
# Chi-Squared = 62.90 using 59 PHA bins.
# Reduced chi-squared = 1.144 for 55 degrees of freedom
# Null hypothesis probability = 2.168223e-01
Photon flux (15-150 keV) in 183 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] : 2.54291 (-0.432303 0.529624)
R^2/D10^2 : 27.1506 (-27.1509 82.3441)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 63.69 using 59 PHA bins.
# Reduced chi-squared = 1.117 for 57 degrees of freedom
# Null hypothesis probability = 2.528660e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.081e-07 1.700e-07
25- 50 2.425e-08 1.494e-08
50-150 9.040e-12 9.928e-12
15-150 3.324e-07 1.846e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.81240 (-1.25158 1.94408)
Norm : 16.4548 (-16.4549 39.4677)
------------------------------------------------------------
# Chi-Squared = 63.52 using 59 PHA bins.
# Reduced chi-squared = 1.114 for 57 degrees of freedom
# Null hypothesis probability = 2.576762e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.032e-07 1.706e-07
25- 50 3.510e-08 2.193e-08
50-150 1.495e-10 1.653e-10
15-150 3.385e-07 1.888e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.33676 (-0.543271 0.548886)
R1^2/D10^2 : 46.5626 (-23.3002 161.892)
kT2 [keV] : 11.4781 (-8.01363 43.4377)
R2^2/D10^2 : 3.74632E-03 (-0.00383946 0.0338191)
------------------------------------------------------------
# Chi-Squared = 60.87 using 59 PHA bins.
# Reduced chi-squared = 1.107 for 55 degrees of freedom
# Null hypothesis probability = 2.730211e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.011e-07 1.605e-07
25- 50 7.236e-08 4.643e-08
50-150 4.356e-08 3.400e-08
15-150 4.170e-07 2.190e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 183.029 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.26679 ( -0.948308 1.13019 )
Norm@50keV : 3.16164E-05 ( -3.16164e-05 4.93698e-05 )
------------------------------------------------------------
# Chi-Squared = 62.90 using 59 PHA bins.
# Reduced chi-squared = 1.104 for 57 degrees of freedom
# Null hypothesis probability = 2.753464e-01
Photon flux (15-150 keV) in 183 sec: 6.30629E-02 ( -0.0118664 0.0119109 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.62029e-07 ( -7.79026e-08 8.35809e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 183.029 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 8.19099E-04 ( )
------------------------------------------------------------
# Chi-Squared = 116.65 using 59 PHA bins.
# Reduced chi-squared = 2.0830 for 56 degrees of freedom
# Null hypothesis probability = 3.717881e-06
Photon flux (15-150 keV) in 183 sec: 6.30024E-02 ( -0.0118632 0.0119039 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.61835e-07 ( -7.80495e-08 8.35596e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 183.029 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.24767 ( 6.57997 8.86696 )
beta : -5.26701 ( -1.31306 0.765919 )
Epeak [keV] : 214.684 ( -214.684 -214.684 )
Norm@50keV : 4.29613E-03 ( -0.00429618 0.006711 )
------------------------------------------------------------
# Chi-Squared = 62.90 using 59 PHA bins.
# Reduced chi-squared = 1.144 for 55 degrees of freedom
# Null hypothesis probability = 2.168223e-01
Photon flux (15-150 keV) in 183 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] : 2.54291 (-0.432303 0.529624)
R^2/D10^2 : 27.1506 (-27.1509 82.3441)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 63.69 using 59 PHA bins.
# Reduced chi-squared = 1.117 for 57 degrees of freedom
# Null hypothesis probability = 2.528660e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.081e-07 1.705e-07
25- 50 2.425e-08 1.518e-08
50-150 9.040e-12 1.098e-11
15-150 3.324e-07 1.855e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.81240 (-1.25158 1.94408)
Norm : 16.4548 (-16.4549 39.4677)
------------------------------------------------------------
# Chi-Squared = 63.52 using 59 PHA bins.
# Reduced chi-squared = 1.114 for 57 degrees of freedom
# Null hypothesis probability = 2.576762e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.032e-07 1.630e-07
25- 50 3.510e-08 2.196e-08
50-150 1.495e-10 1.745e-10
15-150 3.385e-07 1.911e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.33676 (-0.543271 0.548886)
R1^2/D10^2 : 46.5626 (-23.3002 161.892)
kT2 [keV] : 11.4781 (-8.17541 44.266)
R2^2/D10^2 : 3.74632E-03 (-0.00383946 0.0339575)
------------------------------------------------------------
# Chi-Squared = 60.87 using 59 PHA bins.
# Reduced chi-squared = 1.107 for 55 degrees of freedom
# Null hypothesis probability = 2.730211e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.011e-07 1.630e-07
25- 50 7.236e-08 4.628e-08
50-150 4.356e-08 3.447e-08
15-150 4.170e-07 2.129e-07
Plot creation:
Fri Aug 12 13:04:41 EDT 2011