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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
274.7148 -15.9812 0.0234 16.1 -116.6 0.0264 8.2 TRIG_00664624
------------------------------------------
Foreground time interval of the image:
0.000 0.032 (delta_t = 0.032 [sec])
Background time interval of the image:
-106.715 -86.626 (delta_t = 20.089 [sec])
-85.616 -1.616 (delta_t = 84.000 [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
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.032000
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 0.032000
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 0.032000
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 0.032 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.926139 ( -0.397465 0.37006 )
Norm@50keV : 4.16339E-02 ( -0.0105702 0.0104788 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.15 using 59 PHA bins.
# Reduced chi-squared = 0.8097 for 57 degrees of freedom
# Null hypothesis probability = 8.473545e-01
Photon flux (15-150 keV) in 0.032 sec: 4.78042 ( -1.21208 1.21548 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.48028e-08 ( -3.87014e-09 3.89542e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.460877 ( -2.44017 1.55902 )
Epeak [keV] : 100.932 ( -35.6206 -101.426 )
Norm@50keV : 0.175819 ( -0.177252 1.84146 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.17 using 59 PHA bins.
# Reduced chi-squared = 0.7888 for 56 degrees of freedom
# Null hypothesis probability = 8.736112e-01
Photon flux (15-150 keV) in 0.032 sec: 4.73443 ( -1.20881 1.21566 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.44029e-08 ( -4.0551e-09 4.04026e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.28641 ( -1.57293 1.7748 )
beta : -1.53359 ( 9.37167 19.3717 )
Epeak [keV] : 53.7710 ( -101.326 224.43 )
Norm@50keV : 7.80454 ( -7.71896 38.1906 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.67 using 59 PHA bins.
# Reduced chi-squared = 0.7940 for 55 degrees of freedom
# Null hypothesis probability = 8.642943e-01
Photon flux (15-150 keV) in 0.032 sec: 4.69574 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.35698e-08 ( -1.35696e-08 -3.6272e-09 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 21.7356 (-5.19627 7.92438)
R^2/D10^2 : 0.197519 (-0.125128 0.275749)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.78 using 59 PHA bins.
# Reduced chi-squared = 0.7856 for 57 degrees of freedom
# Null hypothesis probability = 8.799193e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.556e-10 2.889e-10
25- 50 2.917e-09 1.329e-09
50-150 1.029e-08 4.958e-09
15-150 1.377e-08 6.603e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-67.8955 -200)
Norm : 18.6648 (-5.00128 5.00128)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.79 using 59 PHA bins.
# Reduced chi-squared = 0.9262 for 57 degrees of freedom
# Null hypothesis probability = 6.335204e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.487e-09 9.243e-10
25- 50 2.861e-09 1.714e-09
50-150 6.274e-09 3.835e-09
15-150 1.062e-08 6.558e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 12.3729 (-12.4938 -12.4938)
R1^2/D10^2 : 0.497659 (-0.49165 -0.49165)
kT2 [keV] : 30.9913 (-31.9472 -31.9472)
R2^2/D10^2 : 4.63497E-02 (-0.04029 0.370265)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.95 using 59 PHA bins.
# Reduced chi-squared = 0.7991 for 55 degrees of freedom
# Null hypothesis probability = 8.574203e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.350e-10 6.459e-10
25- 50 3.050e-09 3.006e-09
50-150 1.072e-08 7.818e-09
15-150 1.450e-08 1.084e-08
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.926139 ( -0.397465 0.37006 )
Norm@50keV : 4.16339E-02 ( -0.0105702 0.0104788 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.15 using 59 PHA bins.
# Reduced chi-squared = 0.8097 for 57 degrees of freedom
# Null hypothesis probability = 8.473545e-01
Photon flux (15-150 keV) in 0.032 sec: 4.78042 ( -1.21208 1.21548 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.48028e-08 ( -3.87014e-09 3.89542e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.460877 ( -2.44017 1.55902 )
Epeak [keV] : 100.932 ( -35.6206 -101.426 )
Norm@50keV : 0.175819 ( -0.177252 1.84146 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.17 using 59 PHA bins.
# Reduced chi-squared = 0.7888 for 56 degrees of freedom
# Null hypothesis probability = 8.736112e-01
Photon flux (15-150 keV) in 0.032 sec: 4.73443 ( -1.20881 1.21566 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.44029e-08 ( -4.0551e-09 4.04026e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.28641 ( -1.57293 1.7748 )
beta : -1.53359 ( 9.37167 19.3717 )
Epeak [keV] : 53.7710 ( -101.326 224.43 )
Norm@50keV : 7.80454 ( -7.71896 38.1906 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.67 using 59 PHA bins.
# Reduced chi-squared = 0.7940 for 55 degrees of freedom
# Null hypothesis probability = 8.642943e-01
Photon flux (15-150 keV) in 0.032 sec: 4.69574 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.35698e-08 ( -1.35696e-08 -3.6272e-09 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 21.7356 (-5.19627 7.92438)
R^2/D10^2 : 0.197519 (-0.125128 0.275749)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.78 using 59 PHA bins.
# Reduced chi-squared = 0.7856 for 57 degrees of freedom
# Null hypothesis probability = 8.799193e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.556e-10 2.462e-10
25- 50 2.917e-09 1.317e-09
50-150 1.029e-08 5.405e-09
15-150 1.377e-08 6.547e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-67.8955 -200)
Norm : 18.6648 (-5.00128 5.00128)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.79 using 59 PHA bins.
# Reduced chi-squared = 0.9262 for 57 degrees of freedom
# Null hypothesis probability = 6.335204e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.487e-09 9.315e-10
25- 50 2.861e-09 1.755e-09
50-150 6.274e-09 3.917e-09
15-150 1.062e-08 6.411e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 12.3729 (-12.4938 -12.4938)
R1^2/D10^2 : 0.497659 (-0.49165 -0.49165)
kT2 [keV] : 30.9913 (-31.9472 -31.9472)
R2^2/D10^2 : 4.63497E-02 (-0.04029 0.370265)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.95 using 59 PHA bins.
# Reduced chi-squared = 0.7991 for 55 degrees of freedom
# Null hypothesis probability = 8.574203e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.350e-10 5.080e-10
25- 50 3.050e-09 2.912e-09
50-150 1.072e-08 8.221e-09
15-150 1.450e-08 1.230e-08
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: 0.926139 ( -0.397465 0.37006 )
Norm@50keV : 4.16339E-02 ( -0.0105702 0.0104788 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.15 using 59 PHA bins.
# Reduced chi-squared = 0.8097 for 57 degrees of freedom
# Null hypothesis probability = 8.473545e-01
Photon flux (15-150 keV) in 0.032 sec: 4.78042 ( -1.21208 1.21548 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.48028e-08 ( -3.87014e-09 3.89542e-09 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.460877 ( -2.44017 1.55902 )
Epeak [keV] : 100.932 ( -35.6206 -101.426 )
Norm@50keV : 0.175819 ( -0.177252 1.84146 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.17 using 59 PHA bins.
# Reduced chi-squared = 0.7888 for 56 degrees of freedom
# Null hypothesis probability = 8.736112e-01
Photon flux (15-150 keV) in 0.032 sec: 4.73443 ( -1.20881 1.21566 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.44029e-08 ( -4.0551e-09 4.04026e-09 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.28641 ( -1.57293 1.7748 )
beta : -1.53359 ( 9.37167 19.3717 )
Epeak [keV] : 53.7710 ( -101.326 224.43 )
Norm@50keV : 7.80454 ( -7.71896 38.1906 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.67 using 59 PHA bins.
# Reduced chi-squared = 0.7940 for 55 degrees of freedom
# Null hypothesis probability = 8.642943e-01
Photon flux (15-150 keV) in 0.032 sec: 4.69574 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.35698e-08 ( -1.35696e-08 -3.6272e-09 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 2.61e-09
S(50-100 keV) = 5.49e-09
T90 vs. Hardness ratio plot
T90 = 0.0320000052452087 sec.
Hardness ratio (energy fluence ratio) = 2.10345
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 2.79872
Count Ratio (50-100 keV) / (15-25 keV) = 3.11974
Mask shadow pattern
IMX = -1.292469318285069E-01, IMY = 2.580959471753967E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.032000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.032000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.032000
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:
-106.715400 -86.626000
-85.616000 -1.616000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9883 -15.6577 0.9 39.2 -76.2 4.8684 12.9 1.2 Sco X-1
254.5614 35.2159 11.9 44.9 4.6 0.2194 1.0 9.1 Her X-1
256.1822 -36.3774 0.0 42.2 -111.5 -0.7557 -1.4 12.5 GX 349+2
262.9131 -24.7428 5.3 29.6 -105.9 0.4152 2.2 5.2 GX 1+4
264.9610 -44.5244 4.7 45.5 -125.9 -1.3003 -2.5 10.3 4U 1735-44
268.2925 -1.6017 13.1 13.8 -53.2 0.1131 0.9 10.0 SW J1753.5-0127
270.3023 -25.0918 5.0 26.1 -118.1 0.3526 2.3 1.2 GX 5-1
270.1884 -25.8377 9.7 26.8 -118.7 0.1845 1.2 8.4 GRS 1758-258
274.0223 -14.1044 2.1 14.8 -110.9 0.6924 5.4 4.2 GX 17+2
275.9325 -30.2787 3.0 29.3 -132.1 0.5575 3.9 5.3 H1820-303
285.0895 -25.0665 7.5 23.6 -149.8 -0.2057 -1.5 9.2 HT1900.1-2455
288.8854 10.9674 12.1 14.3 65.1 0.1143 0.9 5.3 GRS 1915+105
299.6302 35.1913 1.2 40.3 59.4 3.8875 10.0 2.1 Cyg X-1
263.0324 -33.6773 4.8 36.7 -116.0 0.6263 2.4 9.7 GX 354-0
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.000000 0.032000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9537 -15.7387 5.2 39.2 -76.3 0.0227 2.2 6.1 Sco X-1
254.6169 35.3676 11.9 45.0 4.8 0.0055 1.0 7.9 Her X-1
256.5104 -36.5255 4.5 42.2 -111.9 -0.0331 -2.6 7.1 GX 349+2
263.1238 -24.6349 33.2 29.4 -106.1 -0.0016 -0.3 9.1 GX 1+4
264.7013 -44.5413 16.6 45.6 -125.7 -0.0098 -0.7 5.8 4U 1735-44
268.2142 -1.4846 8.4 13.9 -52.7 0.0043 1.4 9.4 SW J1753.5-0127
270.4279 -25.0083 25.7 26.0 -118.3 -0.0018 -0.4 8.9 GX 5-1
270.3705 -25.8673 9.9 26.7 -119.1 -0.0048 -1.2 8.3 GRS 1758-258
274.0104 -14.0403 9.6 14.8 -110.7 -0.0039 -1.2 0.4 GX 17+2
276.0751 -30.3017 5.8 29.2 -132.4 -0.0083 -2.0 8.7 H1820-303
285.0265 -24.9396 4.6 23.5 -149.7 0.0082 2.5 1.3 HT1900.1-2455
288.7955 10.7634 3.9 14.1 65.1 0.0096 3.0 10.9 GRS 1915+105
299.7960 35.1411 5.9 40.3 59.6 0.0184 1.9 10.7 Cyg X-1
262.9069 -33.8589 4.2 36.9 -116.0 -0.0185 -2.8 4.3 GX 354-0
276.4613 -6.4054 1.9 7.4 -93.7 0.0169 5.9 ------ UNKNOWN
274.7147 -15.9812 1.4 16.1 -116.6 0.0264 8.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
324.784600 355.214000
356.384000 933.004000
934.384000 962.424000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
308.1841 40.9750 3.9 46.0 -130.5 4.2865 3.0 3.6 Cyg X-3
326.1721 38.3222 16.7 40.2 -149.4 0.5069 0.7 0.0 Cyg X-2
87.1884 49.9892 3.3 37.3 32.2 2.3319 3.5 ------ UNKNOWN
346.2726 12.3839 3.2 56.4 173.7 8.2750 3.6 ------ UNKNOWN
335.3517 50.1699 3.0 26.9 -145.5 1.8120 3.8 ------ UNKNOWN
165.9610 54.5300 3.2 58.9 -24.4 10.8413 3.5 ------ UNKNOWN
167.9050 56.2634 3.1 57.6 -26.2 9.0813 3.7 ------ UNKNOWN
195.8893 65.4773 3.3 50.8 -44.4 8.0854 3.4 ------ UNKNOWN
Plot creation:
Mon Nov 23 00:27:08 EST 2015