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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
266.1403 -28.7549 0.0084 21.4 16.8 6.2199 22.9 TRIG_00589505
------------------------------------------
Foreground time interval of the image:
276.000 303.020 (delta_t = 27.020 [sec])
631.000 963.055 (delta_t = 332.055 [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)
The mask-weighted light curves based on cleaned DPHs
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
276.000000 303.020000
631.000400 963.055100
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.74418 ( -0.2024 0.211554 )
Norm@50keV : 3.40988E-04 ( -5.5546e-05 5.94741e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.80 using 59 PHA bins.
# Reduced chi-squared = 1.067 for 57 degrees of freedom
# Null hypothesis probability = 3.407969e-01
Photon flux (15-150 keV) in 359.1 sec: 0.168805 ( -0.0118596 0.0119026 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.25454e-06 ( -1.56164e-07 1.56872e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
276.000000 303.020000
631.000400 963.055100
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 1.91498E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 333.36 using 59 PHA bins.
# Reduced chi-squared = 5.9528 for 56 degrees of freedom
# Null hypothesis probability = 4.388487e-41
Photon flux (15-150 keV) in 359.1 sec: 0.157545 ( -0.013019 0.012954 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.99703e-06 ( -1.6027e-07 1.6473e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
276.000000 303.020000
631.000400 963.055100
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.574598 ( -0.447541 0.060614 )
beta : -9.99759 ( 9.99759 0.0974385 )
Epeak [keV] : 11.8383 ( -1.35187 1.21869 )
Norm@50keV : 7.16510E-02 ( -0.00478274 3.90459 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.39 using 59 PHA bins.
# Reduced chi-squared = 0.8253 for 55 degrees of freedom
# Null hypothesis probability = 8.189388e-01
Photon flux (15-150 keV) in 359.1 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] : 4.51040 (-0.290547 0.314754)
R^2/D10^2 : 2.20606 (-0.67897 0.993525)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.39 using 59 PHA bins.
# Reduced chi-squared = 0.8490 for 57 degrees of freedom
# Null hypothesis probability = 7.844419e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.252e-06 1.388e-07
25- 50 6.286e-07 7.900e-08
50-150 1.513e-08 5.855e-09
15-150 1.896e-06 1.779e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.3370 (-1.25826 1.48061)
Norm : 4.44548 (-0.978432 1.29076)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.26 using 59 PHA bins.
# Reduced chi-squared = 0.8116 for 57 degrees of freedom
# Null hypothesis probability = 8.446269e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.320e-06 1.311e-07
25- 50 6.672e-07 8.008e-08
50-150 6.337e-08 2.390e-08
15-150 2.051e-06 1.720e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.85475 (-3.96377 0.64386)
R1^2/D10^2 : 4.03783 (-3.27703 -3.71517)
kT2 [keV] : 7.31100 (-7.71783 80.1133)
R2^2/D10^2 : 6.13992E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.24 using 59 PHA bins.
#Fit statistic : Chi-Squared = 45.21 using 59 PHA bins.
# Reduced chi-squared = 0.8225 for 55 degrees of freedom
# Reduced chi-squared = 0.8219 for 55 degrees of freedom
# Null hypothesis probability = 8.232211e-01
# Null hypothesis probability = 8.241430e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.294e-06 5.828e-07
25- 50 6.491e-07 3.317e-07
50-150 6.890e-08 3.944e-08
15-150 2.012e-06 1.009e-06
Peak spectrum fit
Power-law model
Time interval is from 631.000 sec. to 963.055 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.74418 ( -0.2024 0.211554 )
Norm@50keV : 3.40988E-04 ( -5.5546e-05 5.94741e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.80 using 59 PHA bins.
# Reduced chi-squared = 1.067 for 57 degrees of freedom
# Null hypothesis probability = 3.407969e-01
Photon flux (15-150 keV) in 359.1 sec: 0.168805 ( -0.0118596 0.0119026 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.25454e-06 ( -1.56164e-07 1.56872e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 631.000 sec. to 963.055 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 1.91498E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 333.36 using 59 PHA bins.
# Reduced chi-squared = 5.9528 for 56 degrees of freedom
# Null hypothesis probability = 4.388487e-41
Photon flux (15-150 keV) in 359.1 sec: 0.157545 ( -0.013019 0.012954 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.99703e-06 ( -1.6027e-07 1.6473e-07 ) ergs/cm2
Band function
Time interval is from 631.000 sec. to 963.055 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.574598 ( -0.447541 0.060614 )
beta : -9.99759 ( 9.99759 0.0974385 )
Epeak [keV] : 11.8383 ( -1.35189 1.21869 )
Norm@50keV : 7.16510E-02 ( -0.00478274 3.92177 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.39 using 59 PHA bins.
# Reduced chi-squared = 0.8253 for 55 degrees of freedom
# Null hypothesis probability = 8.189388e-01
Photon flux (15-150 keV) in 359.1 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] : 4.51040 (-0.290547 0.314754)
R^2/D10^2 : 2.20606 (-0.67897 0.993525)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.39 using 59 PHA bins.
# Reduced chi-squared = 0.8490 for 57 degrees of freedom
# Null hypothesis probability = 7.844419e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.252e-06 1.438e-07
25- 50 6.286e-07 8.654e-08
50-150 1.513e-08 6.345e-09
15-150 1.896e-06 1.576e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.3370 (-1.25826 1.48061)
Norm : 4.44548 (-0.978432 1.29076)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.26 using 59 PHA bins.
# Reduced chi-squared = 0.8116 for 57 degrees of freedom
# Null hypothesis probability = 8.446269e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.320e-06 1.314e-07
25- 50 6.672e-07 8.044e-08
50-150 6.337e-08 2.375e-08
15-150 2.051e-06 1.627e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.85475 (-3.93485 0.649752)
R1^2/D10^2 : 4.03783 (-3.27703 -3.71517)
kT2 [keV] : 7.31100 (-7.71783 80.1133)
R2^2/D10^2 : 6.13992E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.24 using 59 PHA bins.
#Fit statistic : Chi-Squared = 45.21 using 59 PHA bins.
# Reduced chi-squared = 0.8225 for 55 degrees of freedom
# Reduced chi-squared = 0.8219 for 55 degrees of freedom
# Null hypothesis probability = 8.232211e-01
# Null hypothesis probability = 8.241430e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.294e-06 6.196e-07
25- 50 6.491e-07 3.296e-07
50-150 6.890e-08 3.823e-08
15-150 2.012e-06 9.116e-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: 3.74418 ( -0.2024 0.211554 )
Norm@50keV : 3.40988E-04 ( -5.5546e-05 5.94741e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.80 using 59 PHA bins.
# Reduced chi-squared = 1.067 for 57 degrees of freedom
# Null hypothesis probability = 3.407969e-01
Photon flux (15-150 keV) in 359.1 sec: 0.168805 ( -0.0118596 0.0119026 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.25454e-06 ( -1.56164e-07 1.56872e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 1.91498E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 333.36 using 59 PHA bins.
# Reduced chi-squared = 5.9528 for 56 degrees of freedom
# Null hypothesis probability = 4.388487e-41
Photon flux (15-150 keV) in 359.1 sec: 0.157545 ( -0.013019 0.012954 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.99703e-06 ( -1.6027e-07 1.6473e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.574598 ( -0.447541 0.060614 )
beta : -9.99759 ( 9.99759 0.0974385 )
Epeak [keV] : 11.8383 ( -1.35188 1.21869 )
Norm@50keV : 7.16510E-02 ( -0.00478274 3.91946 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.39 using 59 PHA bins.
# Reduced chi-squared = 0.8253 for 55 degrees of freedom
# Null hypothesis probability = 8.189388e-01
Photon flux (15-150 keV) in 359.1 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) = 6.60737e-07
S(50-100 keV) = 1.9726e-07
T90 vs. Hardness ratio plot
T90 = 1568 sec.
Hardness ratio (energy fluence ratio) = 0.298545
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.382895
Count Ratio (50-100 keV) / (15-25 keV) = 0.0242071
Mask shadow pattern
IMX = 3.761343683243010E-01, IMY = -1.132768328108184E-01
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:
276.000000 303.020000
631.000400 963.055100
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9901 -15.6533 0.8 32.8 63.8 9.3775 14.7 1.0 Sco X-1
255.9645 -37.8393 299.7 33.8 19.0 0.0159 0.0 1.1 4U 1700-377
256.5078 -36.3537 3.2 32.4 20.2 1.3725 3.6 5.4 GX 349+2
263.0217 -24.6590 2.5 20.2 30.3 1.4084 4.6 5.2 GX 1+4
264.6609 -44.2670 6.4 35.7 3.2 0.7826 1.8 11.5 4U 1735-44
268.3457 -1.5672 4.2 13.4 117.9 0.7334 2.7 7.0 SW J1753.5-0127
270.3552 -25.0313 2.0 16.3 13.0 1.5953 5.8 4.8 GX 5-1
270.2484 -25.7347 2.6 17.0 12.1 1.2348 4.5 3.0 GRS 1758-258
273.9864 -14.0802 2.3 5.5 36.7 1.3654 4.9 2.9 GX 17+2
275.9673 -30.3983 11.1 19.9 -7.7 0.2974 1.0 2.9 H1820-303
284.9448 -24.9576 7.4 15.6 -36.4 0.4490 1.6 5.4 HT1900.1-2455
288.7690 10.9549 0.6 23.9 -167.8 6.1070 18.6 1.8 GRS 1915+105
299.5704 35.1939 2.2 50.0 -171.0 4.0496 5.3 1.1 Cyg X-1
308.1437 40.8375 5.9 58.3 -167.5 3.3534 1.9 7.1 Cyg X-3
262.9984 -33.8447 2.7 27.2 15.1 1.3965 4.3 0.8 GX 354-0
266.1402 -28.7549 0.5 21.4 16.8 6.2215 23.0 ------ UNKNOWN
265.0111 -37.6372 2.8 29.6 8.0 1.4108 4.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
Plot creation:
Tue Mar 18 23:08:57 EDT 2014