batgrbproduct Analysis for Trigger=650221
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): Sun Jul 26 06:04:30 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger650221/GCN5_download_cron
======================================================================
Trigger: 00650221 Segment: 000
BAT Trigger Time: 459483139.84 [s; MET]
Trigger Stop: 459483148.032 [s; MET]
UTC: 2015-07-25T02:12:04.940340 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 7.25560198770997 Dec: 59.5957626978837 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 7.07
Image Trigger?: NO
Rate S/N Ratio: 10.0995049383621 [ if not an image trigger ]
Image S/N Ratio: 7.07
Flight Position: [ source = BAT ]
RA: 7.25560198770997 Dec: 59.5957626978837 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 7.30005446378306 Dec: 59.4958943320221 [deg; J2000]
{ 00h 29m 12.0s , +59d 29' 45.2" }
+/- 4.88403910997031 [arcmin] (estimated 90% radius based on SNR)
+/- 2.70165677167783 [arcmin] (formal 1-sigma fit error)
SNR: 3.1560813580062
Angular difference between Flight and Ground position is 6.142699 arcmin
Partial Coding Fraction: 0.3203125 [ including projection effects ]
Duration
T90: 351.011999964714 +/- 193.905595416726
Measured from: 0.0440001487731934
to: 351.056000113487 [s; relative to TRIGTIME]
T50: 166.215999960899 +/- 247.506543973497
Measured from: 5.4400001168251
to: 171.656000077724 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 5.9200000166893
to: 6.9200000166893 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.811999976634979
to: 425.540000021458 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.382014 0.566159 0.009014 0.150828
0.129296 0.127870 0.109559 0.095271 [error]
Peak 0.044614 0.018912 0.007900 0.012355
0.010903 0.009916 0.008879 0.007331 [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 5.49e-07 2.36e-07 6.02e-08 1.89e-08 8.56e-07 8.64e-07 erg/cm2
Error 9.16e-08 7.85e-08 4.52e-08 2.90e-08 1.67e-07 1.75e-07 erg/cm2
Peak flux Power-law 5.94e-01 1.71e-01 2.68e-02 4.81e-03 7.96e-01 7.98e-01 ph/cm2/s
Error 2.43e-01 1.51e-01 5.27e-02 2.72e-02 3.10e-01 3.13e-01 ph/cm2/s
Fluence Cutoff-PL 5.53e-07 2.33e-07 3.66e-08 2.13e-09 8.20e-07 8.25e-07 erg/cm2
Error 9.36e-08 8.70e-08 4.01e-08 2.73e-08 1.76e-07 1.84e-07 erg/cm2
Peak flux Cutoff-PL 6.09e-01 1.49e-01 1.89e-02 2.69e-03 7.80e-01 7.80e-01 ph/cm2/s
Error -------- 1.52e-01 -------- 2.73e-02 2.98e-01 3.12e-01 ph/cm2/s
Fluence Band 5.17e-06 9.82e-07 9.04e-08 8.99e-09 6.27e-06 6.26e-06 erg/cm2
Error 8.60e-07 -------- -------- -------- 1.22e-06 1.22e-06 erg/cm2
Peak flux Band 5.88e-01 7.08e-02 3.67e-03 2.15e-04 6.66e-01 6.57e-01 ph/cm2/s
Error -------- -------- 5.03e-02 2.75e-02 -------- -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.969 0.626 - - 9.36e-05 5.37e-05 62.580 57
CPL 1.000 0.000 50.0 0.0 7.87e-04 0.00e+00 118.260 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.650 2.534 - - 1.74e-03 2.40e-03 47.000 57
CPL 1.834 0.000 7.6 0.0 1.14e-02 0.00e+00 49.140 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 426.352 -0.812 425.540
T90 351.012 0.044 351.056
T50 166.216 5.440 171.656
Peak 1.000 5.920 6.920
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
7.3001 +59.4959 0.0610 42.4 -41.0 0.4337 3.2 TRIG_00650221
------------------------------------------
Foreground time interval of the image:
-0.812 46.861 (delta_t = 47.673 [sec])
Background time interval of the image:
-239.840 -0.812 (delta_t = 239.028 [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
Multiple GTIs in the spectrum
tstart tstop
-0.812000 90.690000
92.160000 425.540000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.96900 ( -0.567076 0.685577 )
Norm@50keV : 9.35849E-05 ( -4.60762e-05 6.14074e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.58 using 59 PHA bins.
# Reduced chi-squared = 1.098 for 57 degrees of freedom
# Null hypothesis probability = 2.849107e-01
Photon flux (15-150 keV) in 424.9 sec: 5.61726E-02 ( -0.00895507 0.00896574 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.56454e-07 ( -1.60729e-07 1.72576e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-0.812000 90.690000
92.160000 425.540000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 7.86569E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 118.26 using 59 PHA bins.
# Reduced chi-squared = 2.1118 for 56 degrees of freedom
# Null hypothesis probability = 2.380352e-06
Photon flux (15-150 keV) in 424.9 sec: 5.55215E-02 ( -0.0089294 0.0089728 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.19972e-07 ( -1.53533e-07 1.99406e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-0.812000 90.690000
92.160000 425.540000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -8.20791 ( 8.20791 8.20791 )
beta : -3.96900 ( -0.684643 0.566712 )
Epeak [keV] : 6.44811 ( -6.44811 -6.44811 )
Norm@50keV : 1.27195E-02 ( -0.00626235 0.00834618 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.58 using 59 PHA bins.
# Reduced chi-squared = 1.138 for 55 degrees of freedom
# Null hypothesis probability = 2.252068e-01
Photon flux (15-150 keV) in 424.9 sec: 0.348582 ( 6.65142 -0.348582 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.26592e-06 ( -6.26294e-06 -1.19422e-06 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 3.94339 (-0.708111 0.826696)
R^2/D10^2 : 1.52528 (-0.964221 3.16878)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.69 using 59 PHA bins.
# Reduced chi-squared = 1.152 for 57 degrees of freedom
# Null hypothesis probability = 2.011814e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.499e-07 2.550e-07
25- 50 1.906e-07 9.069e-08
50-150 2.124e-09 1.875e-09
15-150 7.426e-07 3.257e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.59388 (-2.66122 3.49504)
Norm : 2.08353 (-0.997094 2.39108)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.87 using 59 PHA bins.
# Reduced chi-squared = 1.103 for 57 degrees of freedom
# Null hypothesis probability = 2.763540e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.527e-07 1.710e-07
25- 50 2.249e-07 9.282e-08
50-150 1.375e-08 1.202e-08
15-150 7.913e-07 2.573e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.67138 (-1.25655 1.61963)
R1^2/D10^2 : 249.379 (-278.8 -281.942)
kT2 [keV] : 5.16663 (-1.28216 2.38399)
R2^2/D10^2 : 0.303497 (-0.302134 0.605996)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.05 using 59 PHA bins.
# Reduced chi-squared = 1.110 for 55 degrees of freedom
# Null hypothesis probability = 2.676282e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.335e-07 2.339e-07
25- 50 2.543e-07 1.441e-07
50-150 1.200e-08 9.205e-09
15-150 7.999e-07 3.850e-07
Peak spectrum fit
Power-law model
Time interval is from 5.920 sec. to 6.920 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.65010 ( -1.33883 3.7299 )
Norm@50keV : 1.74096E-03 ( -0.0017088 0.0030955 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.00 using 59 PHA bins.
# Reduced chi-squared = 0.8245 for 57 degrees of freedom
# Null hypothesis probability = 8.249766e-01
Photon flux (15-150 keV) in 1 sec: 0.795504 ( -0.3322 0.288741 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.99523e-08 ( -1.64307e-08 1.87181e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 5.920 sec. to 6.920 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.83384 ( )
Epeak [keV] : 7.62813 ( )
Norm@50keV : 1.14342E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.14 using 59 PHA bins.
# Reduced chi-squared = 0.8774 for 56 degrees of freedom
# Null hypothesis probability = 7.302284e-01
Photon flux (15-150 keV) in 1 sec: 0.779901 ( -0.319639 0.276319 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.07342e-08 ( -1.7274e-08 1.79089e-08 ) ergs/cm2
Band function
Time interval is from 5.920 sec. to 6.920 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -2.63133 ( 0.811179 2.62002 )
beta : -3.74502 ( 0.807002 -2.35696 )
Epeak [keV] : 146.792 ( -146.792 -146.792 )
Norm@50keV : 0.336743 ( 421.12 -0.309779 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.00 using 59 PHA bins.
# Reduced chi-squared = 0.8545 for 55 degrees of freedom
# Null hypothesis probability = 7.700217e-01
Photon flux (15-150 keV) in 1 sec: 0.666402 ( ) 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] : 2.37437 (-0.929415 1.64348)
R^2/D10^2 : 467.840 (-473.14 31965.6)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.30 using 59 PHA bins.
# Reduced chi-squared = 0.8650 for 57 degrees of freedom
# Null hypothesis probability = 7.557830e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.750e-08 1.034e-08
25- 50 1.039e-09 7.500e-10
50-150 1.955e-13 2.651e-13
15-150 1.854e-08 1.114e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.75170 (-2.57551 55.2708)
Norm : 183.942 (-185.594 8073.96)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.96 using 59 PHA bins.
# Reduced chi-squared = 0.8589 for 57 degrees of freedom
# Null hypothesis probability = 7.669517e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.768e-08 1.077e-08
25- 50 1.987e-09 1.436e-09
50-150 7.914e-12 1.058e-11
15-150 1.967e-08 1.179e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.96725 (-1.04103 1.18379)
R1^2/D10^2 : 1521.78 (-3256.67 6.54262e+06)
kT2 [keV] : 12.5166 (-5.18438 10.5959)
R2^2/D10^2 : 9.43662E-02 (-0.0975276 0.850216)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.26 using 59 PHA bins.
# Reduced chi-squared = 0.7684 for 55 degrees of freedom
# Null hypothesis probability = 8.959416e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.522e-08 8.985e-09
25- 50 1.066e-08 6.590e-09
50-150 1.002e-08 7.125e-09
15-150 3.589e-08 1.942e-08
Plot creation:
Sun Jul 26 06:08:38 EDT 2015