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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
323.4582 +41.9685 0.0339 5.4 179.8 0.0410 5.7 TRIG_00322590
------------------------------------------
Foreground time interval of the image:
0.296 1.000 (delta_t = 0.704 [sec])
Background time interval of the image:
-239.384 0.296 (delta_t = 239.680 [sec])
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 3) 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.
- 4) 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.
- 5) 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 1.024000
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 1.024000
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 1.024000
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
Flight mask-tagged light curves
Caution: Mask-weight map is always using the same on-axis map
Quad-rate summed light curves (from T0-300 to T0+1000)
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 0.296 sec. to 1.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.29123 ( -0.472792 0.467923 )
Norm@50keV : 3.67179E-03 ( -0.00104653 0.00104267 )
------------------------------------------------------------
# Chi-Squared = 47.54 using 59 PHA bins.
# Reduced chi-squared = 0.8341 for 57 degrees of freedom
# Null hypothesis probability = 8.096628e-01
Photon flux (15-150 keV) in 0.704 sec: 0.437353 ( -0.125132 0.125533 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.5598e-08 ( -7.98653e-09 8.20906e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.296 sec. to 1.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.161375 ( -2.83101 1.48495 )
Epeak [keV] : 82.2118 ( -64.5392 -82.2119 )
Norm@50keV : 1.35064E-02 ( -0.0135064 0.383921 )
------------------------------------------------------------
# Chi-Squared = 46.47 using 59 PHA bins.
# Reduced chi-squared = 0.8298 for 56 degrees of freedom
# Null hypothesis probability = 8.142027e-01
Photon flux (15-150 keV) in 0.704 sec: 0.420822 ( -0.127128 0.128352 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.36931e-08 ( -8.46933e-09 8.82915e-09 ) ergs/cm2
Band function
Time interval is from 0.296 sec. to 1.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.160316 ( -0.931548 2.76163 )
beta : -10.00000 ( 3.04662e+11 3.04662e+11 )
Epeak [keV] : 82.1564 ( -36.227 -82.1563 )
Norm@50keV : 1.35258E-02 ( -0.0135259 0.377909 )
------------------------------------------------------------
# Chi-Squared = 46.47 using 59 PHA bins.
# Reduced chi-squared = 0.8449 for 55 degrees of freedom
# Null hypothesis probability = 7.867733e-01
Photon flux (15-150 keV) in 0.704 sec: 0.420556 ( -0.126862 0.128627 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.44334e-08 ( -8.80979e-09 8.1167e-09 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 16.4163 (-5.033 7.60365)
R^2/D10^2 : 3.93209E-02 (-0.0392131 0.0967338)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 47.73 using 59 PHA bins.
# Reduced chi-squared = 0.8374 for 57 degrees of freedom
# Null hypothesis probability = 8.042798e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.533e-09 9.719e-10
25- 50 6.593e-09 3.861e-09
50-150 1.254e-08 7.753e-09
15-150 2.066e-08 1.272e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.362 (-199.936 -199.936)
Norm : 1.80913 (-0.513804 0.513808)
------------------------------------------------------------
# Chi-Squared = 47.91 using 59 PHA bins.
# Reduced chi-squared = 0.8404 for 57 degrees of freedom
# Null hypothesis probability = 7.991174e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.171e-09 1.829e-09
25- 50 6.101e-09 3.569e-09
50-150 1.338e-08 7.772e-09
15-150 2.265e-08 1.343e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.74087 (-8.7793 -8.7793)
R1^2/D10^2 : 0.171901 (-0.170422 -0.170422)
kT2 [keV] : 25.1450 (-25.7745 -25.7745)
R2^2/D10^2 : 6.74362E-03 (-0.00599099 0.0766015)
------------------------------------------------------------
# Chi-Squared = 46.01 using 59 PHA bins.
# Reduced chi-squared = 0.8366 for 55 degrees of freedom
# Null hypothesis probability = 8.007244e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.292e-09 1.537e-09
25- 50 6.554e-09 3.918e-09
50-150 1.511e-08 9.469e-09
15-150 2.396e-08 1.338e-08
Peak spectrum fit
Power-law model
Time interval is from 0.148 sec. to 1.148 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.29781 ( -0.524269 0.525716 )
Norm@50keV : 2.76880E-03 ( -0.000876275 0.000871979 )
------------------------------------------------------------
# Chi-Squared = 43.95 using 59 PHA bins.
# Reduced chi-squared = 0.7711 for 57 degrees of freedom
# Null hypothesis probability = 8.972779e-01
Photon flux (15-150 keV) in 1 sec: 0.330192 ( -0.104574 0.104946 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.73756e-08 ( -9.46135e-09 9.75398e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.148 sec. to 1.148 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -8.97163E-02 ( -2.28477 2.01818 )
Epeak [keV] : 79.0261 ( -79.035 -79.035 )
Norm@50keV : 1.29040E-02 ( -0.0129007 0.562641 )
------------------------------------------------------------
# Chi-Squared = 42.76 using 59 PHA bins.
# Reduced chi-squared = 0.7636 for 56 degrees of freedom
# Null hypothesis probability = 9.033901e-01
Photon flux (15-150 keV) in 1 sec: 0.420797 ( 0.128267 -0.420797 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.3699e-08 ( 1.25043e-08 -3.3699e-08 ) ergs/cm2
Band function
Time interval is from 0.148 sec. to 1.148 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 9.16317E-02 ( 0.540982 2.83662 )
beta : -10.00000 ( 2.85033e+11 2.85033e+11 )
Epeak [keV] : 78.9593 ( -30.5607 -78.9579 )
Norm@50keV : 1.29362E-02 ( -0.0129368 0.553026 )
------------------------------------------------------------
# Chi-Squared = 42.76 using 59 PHA bins.
# Reduced chi-squared = 0.7775 for 55 degrees of freedom
# Null hypothesis probability = 8.852351e-01
Photon flux (15-150 keV) in 1 sec: 0.420556 ( -0.126862 0.128627 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.47065e-08 ( -1.25139e-08 1.15294e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 17.3471 (-5.33347 8.08266)
R^2/D10^2 : 2.50384E-02 (-0.0181702 0.0610995)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 43.37 using 59 PHA bins.
# Reduced chi-squared = 0.7609 for 57 degrees of freedom
# Null hypothesis probability = 9.084891e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.526e-09 9.735e-10
25- 50 6.860e-09 4.207e-09
50-150 1.483e-08 1.003e-08
15-150 2.321e-08 1.577e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-199.99 -199.99)
Norm : 1.36619 (-0.429439 0.429439)
------------------------------------------------------------
# Chi-Squared = 44.19 using 59 PHA bins.
# Reduced chi-squared = 0.7753 for 57 degrees of freedom
# Null hypothesis probability = 8.924357e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.402e-09 1.962e-09
25- 50 6.544e-09 3.765e-09
50-150 1.435e-08 8.555e-09
15-150 2.430e-08 1.439e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.29697 (-1.71697 24.364)
R1^2/D10^2 : 5368.68 ( )
kT2 [keV] : 18.1248 (-5.5848 8.8941)
R2^2/D10^2 : 2.11929E-02 (-0.0211848 0.0241927)
------------------------------------------------------------
# Chi-Squared = 42.45 using 59 PHA bins.
# Chi-Squared = 42.42 using 59 PHA bins.
# Reduced chi-squared = 0.7718 for 55 degrees of freedom
# Reduced chi-squared = 0.7713 for 55 degrees of freedom
# Null hypothesis probability = 8.919631e-01
# Null hypothesis probability = 8.926023e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.081e-09 9.300e-10
25- 50 6.385e-09 3.957e-09
50-150 1.559e-08 1.014e-08
15-150 2.405e-08 1.421e-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: 1.29123 ( -0.472792 0.467923 )
Norm@50keV : 3.67179E-03 ( -0.00104653 0.00104267 )
------------------------------------------------------------
# Chi-Squared = 47.54 using 59 PHA bins.
# Reduced chi-squared = 0.8341 for 57 degrees of freedom
# Null hypothesis probability = 8.096628e-01
Photon flux (15-150 keV) in 0.704 sec: 0.437353 ( -0.125132 0.125533 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.5598e-08 ( -7.98653e-09 8.20906e-09 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.161375 ( -2.83101 1.48495 )
Epeak [keV] : 82.2118 ( -64.5392 -82.2119 )
Norm@50keV : 1.35064E-02 ( -0.0135064 0.383921 )
------------------------------------------------------------
# Chi-Squared = 46.47 using 59 PHA bins.
# Reduced chi-squared = 0.8298 for 56 degrees of freedom
# Null hypothesis probability = 8.142027e-01
Photon flux (15-150 keV) in 0.704 sec: 0.420822 ( -0.127128 0.128352 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.36931e-08 ( -8.46933e-09 8.82915e-09 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.160316 ( -0.931548 2.76163 )
beta : -10.00000 ( 3.04662e+11 3.04662e+11 )
Epeak [keV] : 82.1564 ( -36.227 -82.1563 )
Norm@50keV : 1.35258E-02 ( -0.0135259 0.377909 )
------------------------------------------------------------
# Chi-Squared = 46.47 using 59 PHA bins.
# Reduced chi-squared = 0.8449 for 55 degrees of freedom
# Null hypothesis probability = 7.867733e-01
Photon flux (15-150 keV) in 0.704 sec: 0.420556 ( -0.126862 0.128627 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.44334e-08 ( -8.80979e-09 8.1167e-09 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 5.66963e-09
S(50-100 keV) = 9.26612e-09
T90 vs. Hardness ratio plot
T90 = 0.640000015497208 sec.
Hardness ratio (energy fluence ratio) = 1.63434
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 4.97987
Count Ratio (50-100 keV) / (15-25 keV) = 3.45542
Mask shadow pattern
IMX = 0, IMY = 0
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
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:
-239.384000 0.296000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.5151 35.4610 14.1 57.7 -158.6 0.8839 0.8 7.6 Her X-1
288.7916 10.9289 1.9 48.1 152.6 3.6779 6.2 1.1 GRS 1915+105
299.5878 35.2060 0.2 25.1 174.8 8.6233 47.0 0.3 Cyg X-1
308.1076 40.9655 1.1 16.9 -176.1 1.8253 11.0 0.8 Cyg X-3
326.2885 38.4773 6.3 5.1 133.7 -0.3279 -1.8 10.8 Cyg X-2
345.7343 18.7332 2.2 26.8 57.7 1.2269 5.2 ------ UNKNOWN
14.5015 73.3980 3.3 37.1 -70.2 1.4320 3.5 ------ UNKNOWN
39.0942 71.6674 3.0 43.6 -64.2 3.3058 3.9 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.296000 1.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.3529 35.3777 7.9 57.9 -158.6 -0.0554 -1.5 5.5 Her X-1
288.8138 10.9228 6.4 48.1 152.5 -0.0457 -1.8 1.6 GRS 1915+105
299.5858 35.1395 4.5 25.2 174.6 0.0199 2.6 3.7 Cyg X-1
308.3522 40.8554 0.0 16.7 -176.6 -0.0191 -2.6 12.4 Cyg X-3
325.9943 38.1630 0.0 5.5 133.4 -0.0048 -0.7 12.7 Cyg X-2
30.6095 17.3862 2.1 56.3 7.7 0.2428 5.5 ------ UNKNOWN
274.4024 22.1940 2.9 50.6 175.8 0.0795 4.0 ------ UNKNOWN
323.4583 41.9684 2.0 5.4 179.8 0.0410 5.7 ------ UNKNOWN
26.3211 62.5281 2.6 37.8 -50.9 0.0570 4.4 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
52.116620 262.576000
263.616000 422.646000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.3787 35.4579 109.7 52.8 -145.5 0.3743 0.1 7.9 Her X-1
288.7918 10.9871 3.0 43.3 161.7 7.7242 3.9 2.5 GRS 1915+105
299.5830 35.1988 0.8 19.8 -175.0 11.4124 14.4 0.4 Cyg X-1
308.1760 40.9760 3.0 11.5 -162.8 2.7687 3.8 3.3 Cyg X-3
326.2017 38.4104 8.6 4.2 76.3 1.0454 1.3 5.5 Cyg X-2
263.6862 32.2527 3.4 47.7 -154.1 5.9591 3.4 ------ UNKNOWN
Plot creation:
Wed Feb 17 12:29:07 EST 2010