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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
186.5512 +15.3956 0.0477 5.8 169.1 0.3409 4.0 TRIG_00638217
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [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
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
8 ms binning
From T100_start-3 s to T100_start+3 s
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
2 ms binning
From T100_start-1 s to T100_start+1 s
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
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 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.56666 ( -0.644088 0.866421 )
Norm@50keV : 2.09182E-04 ( -0.000121666 0.000134428 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.70 using 59 PHA bins.
# Reduced chi-squared = 1.258 for 57 degrees of freedom
# Null hypothesis probability = 9.101594e-02
Photon flux (15-150 keV) in 64 sec: 4.28205E-02 ( -0.0147497 0.0149207 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.36297e-07 ( -5.79994e-08 6.84051e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.410999 ( )
Epeak [keV] : 24.8449 ( )
Norm@50keV : 2.38708E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.36 using 59 PHA bins.
# Reduced chi-squared = 1.239 for 56 degrees of freedom
# Null hypothesis probability = 1.082871e-01
Photon flux (15-150 keV) in 64 sec: 4.25137E-02 ( -0.0138404 0.0140501 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15785e-07 ( -4.55072e-08 5.50144e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.28776 ( -3.75274 -2.12524 )
beta : -9.37167 ( 9.37159 19.3568 )
Epeak [keV] : 26.1104 ( -7.74765 8.78564 )
Norm@50keV : 9.46364E-02 ( -0.0945267 978.813 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.32 using 59 PHA bins.
# Reduced chi-squared = 1.260 for 55 degrees of freedom
# Null hypothesis probability = 9.266254e-02
Photon flux (15-150 keV) in 64 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] : 6.67177 (-1.92138 2.4982)
R^2/D10^2 : 0.108295 (-0.108295 0.33912)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.35 using 59 PHA bins.
# Reduced chi-squared = 1.217 for 57 degrees of freedom
# Null hypothesis probability = 1.264406e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.702e-08 2.858e-08
25- 50 5.857e-08 3.910e-08
50-150 8.131e-09 7.370e-09
15-150 1.137e-07 7.578e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 25.8435 (-12.8655 33.0131)
Norm : 0.407229 (-0.201193 0.451572)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.16 using 59 PHA bins.
# Reduced chi-squared = 1.231 for 57 degrees of freedom
# Null hypothesis probability = 1.131904e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.875e-08 2.943e-08
25- 50 5.103e-08 3.278e-08
50-150 2.277e-08 2.131e-08
15-150 1.225e-07 8.238e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.64042 (-4.56676 76.4696)
R1^2/D10^2 : 0.157747 (-0.158766 -0.158766)
kT2 [keV] : 7.65575 (-7.4705 -7.4705)
R2^2/D10^2 : 4.50801E-02 (-0.0565945 0.384661)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.30 using 59 PHA bins.
# Reduced chi-squared = 1.260 for 55 degrees of freedom
# Null hypothesis probability = 9.288705e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.758e-08 1.838e-07
25- 50 5.758e-08 8.150e-07
50-150 1.111e-08 6.614e-07
15-150 1.163e-07 1.515e-06
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.56666 ( -0.644088 0.866421 )
Norm@50keV : 2.09182E-04 ( -0.000121666 0.000134428 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.70 using 59 PHA bins.
# Reduced chi-squared = 1.258 for 57 degrees of freedom
# Null hypothesis probability = 9.101594e-02
Photon flux (15-150 keV) in 64 sec: 4.28205E-02 ( -0.0147497 0.0149207 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.36297e-07 ( -5.79994e-08 6.84051e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.410999 ( )
Epeak [keV] : 24.8449 ( )
Norm@50keV : 2.38708E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.36 using 59 PHA bins.
# Reduced chi-squared = 1.239 for 56 degrees of freedom
# Null hypothesis probability = 1.082871e-01
Photon flux (15-150 keV) in 64 sec: 4.25137E-02 ( -0.0138404 0.0140501 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15785e-07 ( -4.55072e-08 5.50144e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.28776 ( -3.75274 -2.12524 )
beta : -9.37167 ( 9.37159 19.3568 )
Epeak [keV] : 26.1104 ( -7.74765 8.78564 )
Norm@50keV : 9.46364E-02 ( -0.0945267 978.813 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.32 using 59 PHA bins.
# Reduced chi-squared = 1.260 for 55 degrees of freedom
# Null hypothesis probability = 9.266254e-02
Photon flux (15-150 keV) in 64 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] : 6.67177 (-1.92138 2.4982)
R^2/D10^2 : 0.108295 (-0.108295 0.33912)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.35 using 59 PHA bins.
# Reduced chi-squared = 1.217 for 57 degrees of freedom
# Null hypothesis probability = 1.264406e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.702e-08 2.803e-08
25- 50 5.857e-08 3.702e-08
50-150 8.131e-09 7.846e-09
15-150 1.137e-07 7.232e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 25.8435 (-12.8655 33.0131)
Norm : 0.407229 (-0.201193 0.451572)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.16 using 59 PHA bins.
# Reduced chi-squared = 1.231 for 57 degrees of freedom
# Null hypothesis probability = 1.131904e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.875e-08 3.076e-08
25- 50 5.103e-08 3.290e-08
50-150 2.277e-08 2.192e-08
15-150 1.225e-07 7.640e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.64042 (-4.56676 76.4696)
R1^2/D10^2 : 0.157747 (-0.158766 -0.158766)
kT2 [keV] : 7.65575 (-7.4705 -7.4705)
R2^2/D10^2 : 4.50801E-02 (-0.0565945 0.384661)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.30 using 59 PHA bins.
# Reduced chi-squared = 1.260 for 55 degrees of freedom
# Null hypothesis probability = 9.288705e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.758e-08 2.743e-07
25- 50 5.758e-08 5.818e-07
50-150 1.111e-08 7.443e-07
15-150 1.163e-07 8.637e-07
Pre-slew spectrum (Pre-slew PHA with pre-slew DRM)
Power-law model
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.56666 ( -0.644088 0.866421 )
Norm@50keV : 2.09182E-04 ( -0.000121666 0.000134428 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.70 using 59 PHA bins.
# Reduced chi-squared = 1.258 for 57 degrees of freedom
# Null hypothesis probability = 9.101594e-02
Photon flux (15-150 keV) in 64 sec: 4.28205E-02 ( -0.0147497 0.0149207 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.36297e-07 ( -5.79994e-08 6.84051e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.410999 ( )
Epeak [keV] : 24.8449 ( )
Norm@50keV : 2.38708E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.36 using 59 PHA bins.
# Reduced chi-squared = 1.239 for 56 degrees of freedom
# Null hypothesis probability = 1.082871e-01
Photon flux (15-150 keV) in 64 sec: 4.25137E-02 ( -0.0138404 0.0140501 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15785e-07 ( -4.55072e-08 5.50144e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.28776 ( -3.75274 -2.12524 )
beta : -9.37167 ( 9.37159 19.3568 )
Epeak [keV] : 26.1104 ( -7.74765 8.78564 )
Norm@50keV : 9.46364E-02 ( -0.0945267 978.813 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.32 using 59 PHA bins.
# Reduced chi-squared = 1.260 for 55 degrees of freedom
# Null hypothesis probability = 9.266254e-02
Photon flux (15-150 keV) in 64 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 4.55e-08
S(50-100 keV) = 3.07e-08
T90 vs. Hardness ratio plot
T90 = 64 sec.
Hardness ratio (energy fluence ratio) = 0.674725
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.938384
Count Ratio (50-100 keV) / (15-25 keV) = -0.18477
Mask shadow pattern
IMX = -9.957001188351008E-02, IMY = -1.910907965723850E-02
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
Spacecraft aspect plot
Bright source in the pre-burst/pre-slew/post-slew images
Pre-burst image of 15-350 keV band
Time interval of the image:
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.000000 64.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.5850 35.3840 4.9 57.7 -18.6 0.9588 2.4 6.7 Her X-1
Post-slew image of 15-350 keV band
Time interval of the image:
114.100600 483.270000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
204.6290 9.0613 2.4 18.7 54.3 2.3661 4.7 ------ UNKNOWN
159.5584 -6.9673 4.3 34.9 178.5 1.8207 2.7 ------ UNKNOWN
156.3072 -7.9450 3.3 38.0 -179.4 2.3111 3.5 ------ UNKNOWN
197.5969 51.5148 3.5 37.1 -42.1 2.7106 4.0 ------ UNKNOWN
197.1431 51.3609 4.8 36.9 -42.5 2.3383 3.5 ------ UNKNOWN
166.1910 47.3997 3.1 36.1 -77.1 4.0252 3.7 ------ UNKNOWN
Plot creation:
Tue May 5 21:03:11 EDT 2015