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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
250.4728 -45.4968 0.0484 18.4 12.0 1.2701 4.0 TRIG_00639199
------------------------------------------
Foreground time interval of the image:
0.000 376.000 (delta_t = 376.000 [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
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 376.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.18495 ( -0.664933 0.898605 )
Norm@50keV : 8.80004E-05 ( -5.26571e-05 6.48899e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.17 using 59 PHA bins.
# Reduced chi-squared = 0.8977 for 57 degrees of freedom
# Null hypothesis probability = 6.924882e-01
Photon flux (15-150 keV) in 376 sec: 2.77734E-02 ( -0.00769354 0.00773584 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.35337e-07 ( -1.48211e-07 1.69365e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 376.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.46825 ( )
Epeak [keV] : 8.35188 ( )
Norm@50keV : 1.61539E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.51 using 59 PHA bins.
# Reduced chi-squared = 0.9019 for 56 degrees of freedom
# Null hypothesis probability = 6.820114e-01
Photon flux (15-150 keV) in 376 sec: 2.74719E-02 ( -0.00748 0.0075893 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.94902e-07 ( -1.31965e-07 1.86049e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 376.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -7.04476 ( 4.40963 7.04476 )
beta : -3.18496 ( -0.899107 0.665205 )
Epeak [keV] : 29.6025 ( -29.6025 -29.6025 )
Norm@50keV : 1.19604E-02 ( -0.00715633 0.00881993 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.17 using 59 PHA bins.
# Reduced chi-squared = 0.9303 for 55 degrees of freedom
# Null hypothesis probability = 6.217697e-01
Photon flux (15-150 keV) in 376 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] : 4.70754 (-1.21258 1.67364)
R^2/D10^2 : 0.315570 (-0.315571 1.08477)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.11 using 59 PHA bins.
# Reduced chi-squared = 0.8967 for 57 degrees of freedom
# Null hypothesis probability = 6.944271e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.253e-07 1.331e-07
25- 50 1.264e-07 8.253e-08
50-150 3.807e-09 3.929e-09
15-150 3.556e-07 2.151e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.1599 (-6.67614 13.0909)
Norm : 0.491094 (-0.26748 0.773479)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.51 using 59 PHA bins.
# Reduced chi-squared = 0.8861 for 57 degrees of freedom
# Null hypothesis probability = 7.155665e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.172e-07 1.157e-07
25- 50 1.496e-07 8.961e-08
50-150 2.693e-08 2.621e-08
15-150 3.937e-07 2.347e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.84726 (-3.85763 2.15124)
R1^2/D10^2 : 0.678647 (-0.672059 -0.672059)
kT2 [keV] : 10.0949 (-10.1132 -10.1132)
R2^2/D10^2 : 4.06083E-03 (-0.00401534 1.02788)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.17 using 59 PHA bins.
# Reduced chi-squared = 0.9123 for 55 degrees of freedom
# Null hypothesis probability = 6.591667e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.234e-07 1.251e-07
25- 50 1.419e-07 7.706e-08
50-150 4.355e-08 2.859e-08
15-150 4.088e-07 2.358e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 376.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.18495 ( -0.664933 0.898605 )
Norm@50keV : 8.80004E-05 ( -5.26571e-05 6.48899e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.17 using 59 PHA bins.
# Reduced chi-squared = 0.8977 for 57 degrees of freedom
# Null hypothesis probability = 6.924882e-01
Photon flux (15-150 keV) in 376 sec: 2.77734E-02 ( -0.00769354 0.00773584 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.35337e-07 ( -1.48211e-07 1.69365e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 376.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.46825 ( )
Epeak [keV] : 8.35188 ( )
Norm@50keV : 1.61539E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.51 using 59 PHA bins.
# Reduced chi-squared = 0.9019 for 56 degrees of freedom
# Null hypothesis probability = 6.820114e-01
Photon flux (15-150 keV) in 376 sec: 2.74719E-02 ( -0.00748 0.0075893 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.94902e-07 ( -1.31965e-07 1.86049e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 376.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -7.04476 ( 4.40963 7.04476 )
beta : -3.18496 ( -0.899107 0.665205 )
Epeak [keV] : 29.6025 ( -29.6025 -29.6025 )
Norm@50keV : 1.19604E-02 ( -0.00715633 0.00881993 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.17 using 59 PHA bins.
# Reduced chi-squared = 0.9303 for 55 degrees of freedom
# Null hypothesis probability = 6.217697e-01
Photon flux (15-150 keV) in 376 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] : 4.70754 (-1.21258 1.67364)
R^2/D10^2 : 0.315570 (-0.315571 1.08477)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.11 using 59 PHA bins.
# Reduced chi-squared = 0.8967 for 57 degrees of freedom
# Null hypothesis probability = 6.944271e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.253e-07 1.294e-07
25- 50 1.264e-07 7.979e-08
50-150 3.807e-09 3.903e-09
15-150 3.556e-07 2.134e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.1599 (-6.67614 13.0909)
Norm : 0.491094 (-0.26748 0.773479)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.51 using 59 PHA bins.
# Reduced chi-squared = 0.8861 for 57 degrees of freedom
# Null hypothesis probability = 7.155665e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.172e-07 1.043e-07
25- 50 1.496e-07 9.119e-08
50-150 2.693e-08 2.655e-08
15-150 3.937e-07 2.283e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.84726 (-3.85763 2.15124)
R1^2/D10^2 : 0.678647 (-0.672059 -0.672059)
kT2 [keV] : 10.0949 (-10.1132 -10.1132)
R2^2/D10^2 : 4.06083E-03 (-0.00401534 1.02788)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.17 using 59 PHA bins.
# Reduced chi-squared = 0.9123 for 55 degrees of freedom
# Null hypothesis probability = 6.591667e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.234e-07 1.292e-07
25- 50 1.419e-07 8.014e-08
50-150 4.355e-08 2.527e-08
15-150 4.088e-07 2.517e-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: 3.18495 ( -0.664933 0.898605 )
Norm@50keV : 8.80004E-05 ( -5.26571e-05 6.48899e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.17 using 59 PHA bins.
# Reduced chi-squared = 0.8977 for 57 degrees of freedom
# Null hypothesis probability = 6.924882e-01
Photon flux (15-150 keV) in 376 sec: 2.77734E-02 ( -0.00769354 0.00773584 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.35337e-07 ( -1.48211e-07 1.69365e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.46825 ( )
Epeak [keV] : 8.35188 ( )
Norm@50keV : 1.61539E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.51 using 59 PHA bins.
# Reduced chi-squared = 0.9019 for 56 degrees of freedom
# Null hypothesis probability = 6.820114e-01
Photon flux (15-150 keV) in 376 sec: 2.74719E-02 ( -0.00748 0.0075893 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.94902e-07 ( -1.31965e-07 1.86049e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -7.04476 ( 4.40963 7.04476 )
beta : -3.18496 ( -0.899107 0.665205 )
Epeak [keV] : 29.6025 ( -29.6025 -29.6025 )
Norm@50keV : 1.19604E-02 ( -0.00715633 0.00881993 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.17 using 59 PHA bins.
# Reduced chi-squared = 0.9303 for 55 degrees of freedom
# Null hypothesis probability = 6.217697e-01
Photon flux (15-150 keV) in 376 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) = 1.42e-07
S(50-100 keV) = 6.26e-08
T90 vs. Hardness ratio plot
T90 = 376 sec.
Hardness ratio (energy fluence ratio) = 0.440845
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.473547
Count Ratio (50-100 keV) / (15-25 keV) = 0.0569752
Mask shadow pattern
IMX = 3.246891836964264E-01, IMY = -6.877356009201659E-02
TIME vs. PHA plot around the trigger time
TIME vs. DetID plot around the trigger time
100 us light curve (15-350 keV)
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 376.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9809 -15.6286 0.4 22.8 107.0 11.7085 28.7 0.7 Sco X-1
256.2331 -37.7669 0.0 9.7 19.7 -0.0005 -0.0 12.6 4U 1700-377
256.4420 -36.3744 2.5 8.6 25.3 1.5085 4.6 2.9 GX 349+2
262.9776 -24.6467 26.4 5.9 152.1 -0.1503 -0.4 6.2 GX 1+4
264.8223 -44.3114 7.9 13.9 -21.9 0.4777 1.4 9.0 4U 1735-44
268.4749 -1.4474 11.0 29.3 170.0 0.3915 1.0 6.4 SW J1753.5-0127
270.2831 -25.0685 3.5 7.8 -151.6 1.1376 3.3 0.6 GX 5-1
270.3323 -25.7251 3.9 7.4 -147.7 1.0152 3.1 1.9 GRS 1758-258
273.9643 -14.0368 2.1 18.8 -167.7 1.9608 5.6 2.4 GX 17+2
275.8715 -30.3588 2.9 10.3 -106.8 1.3626 4.0 2.8 H1820-303
284.8727 -25.0384 20.5 19.3 -120.5 0.2053 0.6 11.4 HT1900.1-2455
288.8016 10.9297 2.5 47.8 -165.4 3.4709 4.5 1.0 GRS 1915+105
262.8670 -33.6748 14.3 3.4 -3.7 0.2589 0.8 11.4 GX 354-0
223.5092 -22.8989 2.9 36.7 72.6 3.2197 4.0 ------ UNKNOWN
277.3943 -23.7492 1.9 13.7 -135.3 2.1214 6.0 ------ UNKNOWN
310.8372 -50.0609 3.7 39.9 -66.2 3.3959 3.1 ------ UNKNOWN
307.0719 1.8828 4.9 52.3 -139.5 4.8527 2.4 ------ UNKNOWN
309.9831 -17.0403 3.7 43.9 -116.2 5.1615 3.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
436.000590 880.600000
882.000000 963.080500
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.3217 -60.7279 3.1 47.1 6.5 -3.2450 -3.7 6.3 Cen X-3
186.5701 -62.8248 2.6 39.1 5.9 2.7756 4.4 4.0 GX 301-2
244.9820 -15.6382 0.5 30.3 134.9 16.0219 24.6 0.2 Sco X-1
255.9505 -37.7886 3.7 8.8 175.2 1.3361 3.2 3.7 4U 1700-377
256.4205 -36.4464 3.5 10.1 173.7 1.4457 3.3 1.6 GX 349+2
262.9879 -24.7143 3.7 23.1 175.5 1.2378 3.1 2.2 GX 1+4
264.8298 -44.4477 7.2 10.2 -125.6 0.6919 1.6 3.7 4U 1735-44
268.1938 -1.5385 0.0 46.7 170.1 2.0270 1.8 11.6 SW J1753.5-0127
270.3569 -25.1766 3.1 25.9 -169.7 1.7895 3.8 7.1 GX 5-1
270.3524 -25.7191 4.7 25.4 -169.1 1.2090 2.6 3.1 GRS 1758-258
274.0148 -14.0087 2.2 37.3 -174.8 3.0954 5.3 1.7 GX 17+2
275.8476 -30.3760 5.8 24.9 -153.3 1.1324 2.0 4.0 H1820-303
284.8819 -24.9658 34.2 34.4 -149.5 0.1941 0.3 8.8 HT1900.1-2455
262.9269 -33.8301 4.3 15.1 -171.1 1.1435 2.6 3.1 GX 354-0
255.1893 -41.6912 1.9 5.2 -171.3 2.7038 6.3 ------ UNKNOWN
260.6410 -34.2446 3.2 13.7 -176.5 1.5550 3.6 ------ UNKNOWN
141.6631 -62.6552 3.9 58.0 -3.7 7.8737 3.0 ------ UNKNOWN
237.2651 -69.9357 2.7 25.3 -24.0 1.9129 4.3 ------ UNKNOWN
282.9196 -7.6508 2.8 47.1 -168.0 3.6246 4.2 ------ UNKNOWN
308.1955 -35.8423 2.5 43.9 -116.2 9.3840 4.6 ------ UNKNOWN
Plot creation:
Tue Apr 28 17:16:37 EDT 2015