Click here for the BAT GCN circular template
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
150.7683 -25.9908 0.0640 46.7 -165.1 0.4590 3.0 TRIG_00607506
------------------------------------------
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: 2.58521 ( -0.677275 0.916714 )
Norm@50keV : 4.31032E-04 ( -0.000250033 0.000262498 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.91 using 59 PHA bins.
# Reduced chi-squared = 1.367 for 57 degrees of freedom
# Null hypothesis probability = 3.432738e-02
Photon flux (15-150 keV) in 64 sec: 8.92933E-02 ( -0.0316305 0.0316875 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.82646e-07 ( -1.18017e-07 1.32847e-07 ) 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: -4.87978 ( )
Epeak [keV] : 27.7737 ( -17.2698 7.5961 )
Norm@50keV : 54.7179 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.77 using 59 PHA bins.
# Reduced chi-squared = 1.335 for 56 degrees of freedom
# Null hypothesis probability = 4.760446e-02
Photon flux (15-150 keV) in 64 sec: 7.96144E-02 ( -0.0289812 0.0321556 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.16703e-07 ( -7.77914e-08 1.00086e-07 ) 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 : 4.83121 ( -6.88789 -4.83121 )
beta : -6.23294 ( 6.23294 14.4714 )
Epeak [keV] : 27.6042 ( -5.36316 6.50969 )
Norm@50keV : 52.6937 ( -17.3961 454.185 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.71 using 59 PHA bins.
# Reduced chi-squared = 1.358 for 55 degrees of freedom
# Null hypothesis probability = 3.967433e-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] : 6.78829 (-1.7744 2.40591)
R^2/D10^2 : 0.206165 (-0.206165 0.546338)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.24 using 59 PHA bins.
# Reduced chi-squared = 1.320 for 57 degrees of freedom
# Null hypothesis probability = 5.315891e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.451e-08 5.664e-08
25- 50 1.219e-07 7.619e-08
50-150 1.805e-08 1.536e-08
15-150 2.344e-07 1.471e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 26.1067 (-13.1352 37.2881)
Norm : 0.831628 (-0.443571 1.03774)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.71 using 59 PHA bins.
# Reduced chi-squared = 1.346 for 57 degrees of freedom
# Null hypothesis probability = 4.192350e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.002e-07 6.157e-08
25- 50 1.055e-07 6.480e-08
50-150 4.777e-08 4.266e-08
15-150 2.535e-07 1.602e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 200.000 ( )
R1^2/D10^2 : 2.21418E-06 (-2.21329e-06 -2.21329e-06)
kT2 [keV] : 6.69159 (-1.63305 2.40299)
R2^2/D10^2 : 0.216435 (-0.1578 0.50037)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.24 using 59 PHA bins.
#Fit statistic : Chi-Squared = 75.06 using 59 PHA bins.
# Reduced chi-squared = 1.368 for 55 degrees of freedom
# Reduced chi-squared = 1.365 for 55 degrees of freedom
# Null hypothesis probability = 3.627386e-02
# Null hypothesis probability = 3.738981e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.457e-08 6.669e-02
25- 50 1.218e-07 5.853e-01
50-150 1.805e-08 1.358e+01
15-150 2.344e-07 1.551e+01
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: 2.58521 ( -0.677275 0.916714 )
Norm@50keV : 4.31032E-04 ( -0.000250033 0.000262498 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.91 using 59 PHA bins.
# Reduced chi-squared = 1.367 for 57 degrees of freedom
# Null hypothesis probability = 3.432738e-02
Photon flux (15-150 keV) in 64 sec: 8.92933E-02 ( -0.0316305 0.0316875 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.82646e-07 ( -1.18017e-07 1.32847e-07 ) 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: -4.87978 ( )
Epeak [keV] : 27.7737 ( -15.2474 7.597 )
Norm@50keV : 54.7179 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.77 using 59 PHA bins.
# Reduced chi-squared = 1.335 for 56 degrees of freedom
# Null hypothesis probability = 4.760446e-02
Photon flux (15-150 keV) in 64 sec: 7.96144E-02 ( -0.0289812 0.0321556 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.16703e-07 ( -7.77914e-08 1.00086e-07 ) 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 : 4.83121 ( -6.85065 -4.83121 )
beta : -6.23294 ( 6.23294 14.4714 )
Epeak [keV] : 27.6042 ( -5.36316 6.50969 )
Norm@50keV : 52.6937 ( -17.3961 454.185 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.71 using 59 PHA bins.
# Reduced chi-squared = 1.358 for 55 degrees of freedom
# Null hypothesis probability = 3.967433e-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] : 6.78829 (-1.7744 2.40591)
R^2/D10^2 : 0.206165 (-0.206165 0.546338)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.24 using 59 PHA bins.
# Reduced chi-squared = 1.320 for 57 degrees of freedom
# Null hypothesis probability = 5.315891e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.451e-08 5.741e-08
25- 50 1.219e-07 7.904e-08
50-150 1.805e-08 1.588e-08
15-150 2.344e-07 1.449e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 26.1067 (-13.1352 37.2881)
Norm : 0.831628 (-0.443571 1.03774)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.71 using 59 PHA bins.
# Reduced chi-squared = 1.346 for 57 degrees of freedom
# Null hypothesis probability = 4.192350e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.002e-07 6.224e-08
25- 50 1.055e-07 6.496e-08
50-150 4.777e-08 4.403e-08
15-150 2.535e-07 1.665e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 200.000 ( )
R1^2/D10^2 : 2.21418E-06 (-2.21329e-06 -2.21329e-06)
kT2 [keV] : 6.69159 (-1.63305 2.40299)
R2^2/D10^2 : 0.216435 (-0.1578 0.50037)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.24 using 59 PHA bins.
#Fit statistic : Chi-Squared = 75.06 using 59 PHA bins.
# Reduced chi-squared = 1.368 for 55 degrees of freedom
# Reduced chi-squared = 1.365 for 55 degrees of freedom
# Null hypothesis probability = 3.627386e-02
# Null hypothesis probability = 3.738981e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.457e-08 7.542e-02
25- 50 1.218e-07 5.962e-01
50-150 1.805e-08 1.419e+01
15-150 2.344e-07 1.641e+01
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: 2.58521 ( -0.677275 0.916714 )
Norm@50keV : 4.31032E-04 ( -0.000250033 0.000262498 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.91 using 59 PHA bins.
# Reduced chi-squared = 1.367 for 57 degrees of freedom
# Null hypothesis probability = 3.432738e-02
Photon flux (15-150 keV) in 64 sec: 8.92933E-02 ( -0.0316305 0.0316875 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.82646e-07 ( -1.18017e-07 1.32847e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.87978 ( )
Epeak [keV] : 27.7737 ( -16.7675 7.59626 )
Norm@50keV : 54.7179 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.77 using 59 PHA bins.
# Reduced chi-squared = 1.335 for 56 degrees of freedom
# Null hypothesis probability = 4.760446e-02
Photon flux (15-150 keV) in 64 sec: 7.96144E-02 ( -0.0289812 0.0321556 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.16703e-07 ( -7.77914e-08 1.00086e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.83121 ( -6.84483 -4.83121 )
beta : -6.23294 ( 6.23294 14.4714 )
Epeak [keV] : 27.6042 ( -5.36316 6.50969 )
Norm@50keV : 52.6937 ( -17.3961 454.185 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.71 using 59 PHA bins.
# Reduced chi-squared = 1.358 for 55 degrees of freedom
# Null hypothesis probability = 3.967433e-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) = 9.44e-08
S(50-100 keV) = 6.29e-08
T90 vs. Hardness ratio plot
T90 = 64 sec.
Hardness ratio (energy fluence ratio) = 0.666314
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.14712
Count Ratio (50-100 keV) / (15-25 keV) = 0.143875
Mask shadow pattern
IMX = -1.024086460578689E+00, IMY = 2.728333467241192E-01
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] [']
188.1544 -41.6182 3.0 49.4 148.1 1.2978 3.8 ------ UNKNOWN
156.2336 20.3439 2.2 29.8 -89.7 0.6229 5.3 ------ UNKNOWN
154.3421 46.1238 2.6 46.2 -56.4 1.5831 4.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
139.700600 363.130000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5648 -40.6092 2.3 19.3 154.9 6.1242 5.0 3.7 Vela X-1
170.2098 -60.5878 7.8 37.0 102.0 5.9186 1.5 3.8 Cen X-3
92.7214 -15.5296 2.9 54.9 -153.4 20.5058 4.1 ------ UNKNOWN
145.8070 16.2006 2.9 42.5 -69.3 17.6756 4.0 ------ UNKNOWN
Plot creation:
Sat Aug 23 21:21:30 EDT 2014