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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
276.0949 -24.8638 0.0371 22.4944 19.3431 0.7696717 5.167 TRIG_00552336
Foreground time interval of the image:
0.000 120.000 (delta_t = 120.000 [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)
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
Time interval is from 0.000 sec. to 120.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.99223 ( -0.613119 0.684394 )
Norm@50keV : 2.73987E-04 ( -0.000117513 0.000111687 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.22 using 59 PHA bins.
# Reduced chi-squared = 1.021 for 57 degrees of freedom
# Null hypothesis probability = 4.303178e-01
Photon flux (15-150 keV) in 120 sec: 4.09519E-02 ( -0.0134421 0.0134483 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.03078e-07 ( -1.16041e-07 1.24997e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 120.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -10.0000 ( )
Epeak [keV] : 24.2814 ( -3.19364 3.96108 )
Norm@50keV : 4.63381E+05 ( -463324 2.0341e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.48 using 59 PHA bins.
# Reduced chi-squared = 1.026 for 56 degrees of freedom
# Null hypothesis probability = 4.202895e-01
Photon flux (15-150 keV) in 120 sec: 4.09423E-02 ( -0.0134715 0.0134397 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.29484e-18 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 120.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5 -5 )
beta : -2.66229 ( -3.69865 0.96907 )
Epeak [keV] : 24.6002 ( -10.9048 6.40899 )
Norm@50keV : 59.6030 ( -18.5456 1975.07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.49 using 59 PHA bins.
# Reduced chi-squared = 1.009 for 55 degrees of freedom
# Null hypothesis probability = 4.561056e-01
Photon flux (15-150 keV) in 120 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] : 6.78993 (-1.90855 3.92855)
R^2/D10^2 : 8.72770E-02 (-0.0872552 0.26868)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.46 using 59 PHA bins.
# Reduced chi-squared = 1.043 for 57 degrees of freedom
# Null hypothesis probability = 3.861677e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.507e-08 4.606e-08
25- 50 9.684e-08 6.138e-08
50-150 1.436e-08 1.235e-08
15-150 1.863e-07 1.198e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 58.6871 (-37.3119 -58.7287)
Norm : 0.216302 (-0.0966744 0.231928)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.41 using 59 PHA bins.
# Reduced chi-squared = 1.025 for 57 degrees of freedom
# Null hypothesis probability = 4.235050e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.500e-08 3.771e-08
25- 50 9.825e-08 5.993e-08
50-150 1.097e-07 9.222e-08
15-150 2.730e-07 1.781e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.84289 (-1.88092 2.78462)
R1^2/D10^2 : 0.146103 (-0.116736 0.506273)
kT2 [keV] : 42.3854 (-40.9182 -42.4282)
R2^2/D10^2 : 8.59664E-05 (-8.46748e-05 0.00280916)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.47 using 59 PHA bins.
# Reduced chi-squared = 1.009 for 55 degrees of freedom
# Null hypothesis probability = 4.567884e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.877e-08 4.915e-08
25- 50 8.784e-08 5.092e-08
50-150 1.688e-07 9.798e-08
15-150 3.354e-07 1.634e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 120.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.99223 ( -0.613119 0.684394 )
Norm@50keV : 2.73987E-04 ( -0.000117513 0.000111687 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.22 using 59 PHA bins.
# Reduced chi-squared = 1.021 for 57 degrees of freedom
# Null hypothesis probability = 4.303178e-01
Photon flux (15-150 keV) in 120 sec: 4.09519E-02 ( -0.0134421 0.0134483 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.03078e-07 ( -1.16041e-07 1.24997e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 120.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -10.0000 ( )
Epeak [keV] : 24.2814 ( -3.19364 3.96108 )
Norm@50keV : 4.63381E+05 ( -463324 2.0341e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.48 using 59 PHA bins.
# Reduced chi-squared = 1.026 for 56 degrees of freedom
# Null hypothesis probability = 4.202895e-01
Photon flux (15-150 keV) in 120 sec: 4.09423E-02 ( -0.0134715 0.0134397 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.29484e-18 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 120.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5 -5 )
beta : -2.66229 ( -3.69865 0.96907 )
Epeak [keV] : 24.6002 ( -10.8346 6.40947 )
Norm@50keV : 59.6030 ( -18.5456 1975.07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.49 using 59 PHA bins.
# Reduced chi-squared = 1.009 for 55 degrees of freedom
# Null hypothesis probability = 4.561056e-01
Photon flux (15-150 keV) in 120 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] : 6.78993 (-1.90855 3.92855)
R^2/D10^2 : 8.72770E-02 (-0.0872552 0.26868)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.46 using 59 PHA bins.
# Reduced chi-squared = 1.043 for 57 degrees of freedom
# Null hypothesis probability = 3.861677e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.507e-08 4.532e-08
25- 50 9.684e-08 6.300e-08
50-150 1.436e-08 1.231e-08
15-150 1.863e-07 1.138e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 58.6871 (-37.3119 -58.7287)
Norm : 0.216302 (-0.0966744 0.231928)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.41 using 59 PHA bins.
# Reduced chi-squared = 1.025 for 57 degrees of freedom
# Null hypothesis probability = 4.235050e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.500e-08 4.184e-08
25- 50 9.825e-08 6.258e-08
50-150 1.097e-07 8.562e-08
15-150 2.730e-07 1.805e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.84289 (-1.88092 2.78462)
R1^2/D10^2 : 0.146103 (-0.116736 0.506273)
kT2 [keV] : 42.3854 (-30.9866 -42.4282)
R2^2/D10^2 : 8.59664E-05 (-8.46748e-05 0.00280916)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.47 using 59 PHA bins.
# Reduced chi-squared = 1.009 for 55 degrees of freedom
# Null hypothesis probability = 4.567884e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.877e-08 4.959e-08
25- 50 8.784e-08 5.197e-08
50-150 1.688e-07 1.090e-07
15-150 3.354e-07 1.703e-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: 1.99223 ( -0.613119 0.684394 )
Norm@50keV : 2.73987E-04 ( -0.000117513 0.000111687 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.22 using 59 PHA bins.
# Reduced chi-squared = 1.021 for 57 degrees of freedom
# Null hypothesis probability = 4.303178e-01
Photon flux (15-150 keV) in 120 sec: 4.09519E-02 ( -0.0134421 0.0134483 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.03078e-07 ( -1.16041e-07 1.24997e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -10.0000 ( )
Epeak [keV] : 24.2814 ( -3.19364 3.96108 )
Norm@50keV : 4.63381E+05 ( -463324 2.0341e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.48 using 59 PHA bins.
# Reduced chi-squared = 1.026 for 56 degrees of freedom
# Null hypothesis probability = 4.202895e-01
Photon flux (15-150 keV) in 120 sec: 4.09423E-02 ( -0.0134715 0.0134397 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.29484e-18 ( 0 0 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5 -5 )
beta : -2.66229 ( -3.69865 0.96907 )
Epeak [keV] : 24.6002 ( -10.5826 6.40886 )
Norm@50keV : 59.6030 ( -18.5456 1975.07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.49 using 59 PHA bins.
# Reduced chi-squared = 1.009 for 55 degrees of freedom
# Null hypothesis probability = 4.561056e-01
Photon flux (15-150 keV) in 120 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) = 9.10267e-08
S(50-100 keV) = 9.15182e-08
T90 vs. Hardness ratio plot
T90 = 120 sec.
Hardness ratio (energy fluence ratio) = 1.0054
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.546335
Count Ratio (50-100 keV) / (15-25 keV) = 0.433687
Mask shadow pattern
IMX = 3.907231698732354E-01, IMY = -1.371597024935302E-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:
0.000000 120.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9650 -15.6481 1.5 38.2 74.4 3.6841 7.5 1.0 Sco X-1
254.3054 35.4472 0.0 46.2 154.9 0.7613 1.8 9.7 Her X-1
255.9670 -37.8636 1.5 42.0 36.8 2.6119 7.7 1.5 4U 1700-377
256.4378 -36.4259 88.2 40.7 37.8 0.0421 0.1 0.2 GX 349+2
263.1506 -24.8920 8.3 28.2 43.6 0.2713 1.4 11.7 GX 1+4
264.6564 -44.5874 3.9 44.2 23.5 -0.9768 -2.9 9.0 4U 1735-44
268.2309 -1.4282 3.4 13.5 102.6 0.4737 3.4 8.4 SW J1753.5-0127
270.4497 -25.1678 12.0 24.6 31.0 0.1565 1.0 10.4 GX 5-1
270.1567 -25.8016 4.0 25.3 30.9 0.4614 2.9 8.6 GRS 1758-258
273.9776 -14.0027 2.8 13.3 40.2 0.5867 4.1 2.6 GX 17+2
275.8205 -30.2405 5.4 27.8 16.9 0.3509 2.1 9.3 H1820-303
285.1549 -24.8798 5.1 22.1 -2.4 -0.3384 -2.3 6.9 HT1900.1-2455
288.7901 10.9299 0.6 15.7 -146.9 2.6601 19.7 1.1 GRS 1915+105
299.5726 35.2101 1.2 41.8 -151.7 2.2360 10.0 1.0 Cyg X-1
308.0494 40.9535 2.9 50.1 -147.9 1.5681 4.0 2.8 Cyg X-3
262.9769 -33.8821 5.4 35.4 33.4 0.4777 2.1 2.9 GX 354-0
243.0054 -12.2641 2.4 39.3 80.4 2.7734 4.9 ------ UNKNOWN
267.9714 -39.2427 2.3 38.3 23.3 1.1150 4.9 ------ UNKNOWN
276.0949 -24.8637 2.2 22.5 19.3 0.7694 5.2 ------ UNKNOWN
312.3200 -54.8558 2.4 57.5 -14.3 2.9530 4.8 ------ UNKNOWN
297.4123 37.6661 2.8 43.2 -155.5 0.9861 4.1 ------ UNKNOWN
UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
173.900600 963.060000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9697 -15.6554 0.6 30.5 104.1 23.2409 19.2 1.1 Sco X-1
255.9823 -37.8421 1.1 21.4 50.5 7.1401 10.3 0.2 4U 1700-377
256.6295 -36.3371 119.9 20.2 53.4 0.0650 0.1 10.7 GX 349+2
263.0205 -24.7009 18.6 11.9 90.6 0.3508 0.6 2.8 GX 1+4
264.7479 -44.4538 8.9 21.6 24.9 0.7551 1.3 0.3 4U 1735-44
268.2321 -1.3444 4.8 24.7 163.4 1.5097 2.4 10.4 SW J1753.5-0127
270.3188 -25.0329 1.9 5.2 89.6 3.6293 6.2 3.4 GX 5-1
270.2941 -25.7718 2.7 5.3 81.7 2.4815 4.2 1.8 GRS 1758-258
273.9468 -14.0137 1.6 11.1 171.5 4.1966 7.1 3.7 GX 17+2
275.9246 -30.3785 15.3 5.5 4.1 0.4212 0.8 0.7 H1820-303
284.8892 -25.0846 0.0 8.0 -84.2 0.5291 0.9 12.7 HT1900.1-2455
288.7916 10.9439 0.6 37.9 -157.0 17.5891 17.9 0.4 GRS 1915+105
263.0229 -33.9322 3.3 14.5 51.0 2.0022 3.5 6.1 GX 354-0
263.3966 0.5779 2.3 28.3 154.8 3.8969 5.1 ------ UNKNOWN
265.7389 29.4419 2.2 55.2 171.5 15.5019 5.2 ------ UNKNOWN
274.9984 -6.9669 3.8 17.9 178.9 1.9612 3.1 ------ UNKNOWN
307.5052 -36.9009 3.2 29.3 -55.8 2.7461 3.6 ------ UNKNOWN
294.3136 31.2433 4.2 58.8 -159.3 14.3520 2.8 ------ UNKNOWN
Plot creation:
Wed Apr 3 17:51:46 EDT 2013