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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
293.7216 +21.8898 0.0081 0.0 -99.3 0.1134 23.7 TRIG_00632159
------------------------------------------
Foreground time interval of the image:
-0.004 0.016 (delta_t = 0.020 [sec])
Background time interval of the image:
-179.572 -0.004 (delta_t = 179.568 [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 0.008000
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 0.008000
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 0.008000
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 -0.004 sec. to 0.016 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.97493 ( -0.141136 0.151755 )
Norm@50keV : 0.170871 ( -0.0207916 0.0205173 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.66 using 59 PHA bins.
# Reduced chi-squared = 1.292 for 57 degrees of freedom
# Null hypothesis probability = 6.795457e-02
Photon flux (15-150 keV) in 0.02 sec: 46.1443 ( -3.93208 3.93514 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.05928e-08 ( -3.49456e-09 3.5009e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.004 sec. to 0.016 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.948449 ( -0.90479 0.763173 )
Epeak [keV] : 20.1617 ( -11.3256 5.88815 )
Norm@50keV : 2.93413 ( -2.93509 7.79835 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.16 using 59 PHA bins.
# Reduced chi-squared = 0.8600 for 56 degrees of freedom
# Null hypothesis probability = 7.626864e-01
Photon flux (15-150 keV) in 0.02 sec: 45.3855 ( -3.9773 3.9787 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.01428e-08 ( 0 0 ) ergs/cm2
Band function
Time interval is from -0.004 sec. to 0.016 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.947396 ( -0.66831 1.00623 )
beta : -10.0000 ( 10 0 )
Epeak [keV] : 20.1627 ( -6.15348 5.87955 )
Norm@50keV : 2.93925 ( -2.93925 7.82861 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.16 using 59 PHA bins.
# Reduced chi-squared = 0.8756 for 55 degrees of freedom
# Null hypothesis probability = 7.314582e-01
Photon flux (15-150 keV) in 0.02 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] : 7.36340 (-0.582153 0.600114)
R^2/D10^2 : 71.2271 (-20.9656 31.1108)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.04 using 59 PHA bins.
# Reduced chi-squared = 1.141 for 57 degrees of freedom
# Null hypothesis probability = 2.170485e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.304e-08 1.619e-09
25- 50 1.966e-08 1.977e-09
50-150 3.899e-09 9.100e-10
15-150 3.659e-08 3.660e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 24.9254 (-3.10398 3.4848)
Norm : 451.008 (-69.9194 84.2695)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.93 using 59 PHA bins.
# Reduced chi-squared = 0.8583 for 57 degrees of freedom
# Null hypothesis probability = 7.679063e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.649e-08 1.863e-09
25- 50 1.687e-08 1.686e-09
50-150 7.141e-09 1.605e-09
15-150 4.050e-08 3.580e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.69678 (-1.18824 1.43413)
R1^2/D10^2 : 812.599 (-593.833 5060.56)
kT2 [keV] : 9.48616 (-1.32173 2.21547)
R2^2/D10^2 : 17.4920 (-12.5524 22.1379)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.17 using 59 PHA bins.
# Reduced chi-squared = 0.8577 for 55 degrees of freedom
# Null hypothesis probability = 7.643886e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.624e-08 7.828e-09
25- 50 1.732e-08 7.539e-09
50-150 6.491e-09 3.609e-09
15-150 4.005e-08 1.575e-08
Peak spectrum fit
Power-law model
Time interval is from -0.492 sec. to 0.508 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.62557 ( -0.311545 0.356288 )
Norm@50keV : 4.19273E-03 ( -0.0011621 0.00118587 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.84 using 59 PHA bins.
# Reduced chi-squared = 0.8744 for 57 degrees of freedom
# Null hypothesis probability = 7.382296e-01
Photon flux (15-150 keV) in 1 sec: 0.891307 ( -0.14195 0.142103 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.35058e-08 ( -8.59297e-09 9.05859e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.492 sec. to 0.508 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.546706 ( -2.8344 1.52466 )
Epeak [keV] : 21.8707 ( )
Norm@50keV : 0.108724 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.86 using 59 PHA bins.
# Reduced chi-squared = 0.8010 for 56 degrees of freedom
# Null hypothesis probability = 8.572919e-01
Photon flux (15-150 keV) in 1 sec: 0.875069 ( -0.138075 0.138981 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.77994e-08 ( -7.326e-09 8.5978e-09 ) ergs/cm2
Band function
Time interval is from -0.492 sec. to 0.508 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.36969 ( -1.32305 2.03137 )
beta : -3.22503 ( 9.37167 19.3702 )
Epeak [keV] : 21.5776 ( -5.60301 6.58414 )
Norm@50keV : 1100.24 ( -1099.23 211.259 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.49 using 59 PHA bins.
# Reduced chi-squared = 0.7908 for 55 degrees of freedom
# Null hypothesis probability = 8.686219e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.75735e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.38616 (-1.00038 1.16516)
R^2/D10^2 : 2.58568 (-1.31659 2.78814)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.77 using 59 PHA bins.
# Reduced chi-squared = 0.8206 for 57 degrees of freedom
# Null hypothesis probability = 8.310607e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.524e-08 4.230e-09
25- 50 1.736e-08 5.840e-09
50-150 2.039e-09 1.181e-09
15-150 3.464e-08 8.425e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 25.7037 (-7.29721 11.0425)
Norm : 8.44170 (-2.44175 3.71819)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.47 using 59 PHA bins.
# Reduced chi-squared = 0.7977 for 57 degrees of freedom
# Null hypothesis probability = 8.641039e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.574e-08 3.355e-09
25- 50 1.642e-08 4.280e-09
50-150 7.268e-09 4.192e-09
15-150 3.942e-08 9.360e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.60397 (-4.6494 -4.6494)
R1^2/D10^2 : 6.96379 (-6.87371 467243)
kT2 [keV] : 10.3292 (-10.4404 -10.4404)
R2^2/D10^2 : 0.179226 (-0.170033 2.64908)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.11 using 59 PHA bins.
# Reduced chi-squared = 0.8020 for 55 degrees of freedom
# Null hypothesis probability = 8.535114e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.597e-08 9.290e-09
25- 50 1.661e-08 8.690e-09
50-150 6.032e-09 3.634e-09
15-150 3.860e-08 1.996e-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: 2.97493 ( -0.141136 0.151755 )
Norm@50keV : 0.170871 ( -0.0207916 0.0205173 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.66 using 59 PHA bins.
# Reduced chi-squared = 1.292 for 57 degrees of freedom
# Null hypothesis probability = 6.795457e-02
Photon flux (15-150 keV) in 0.02 sec: 46.1443 ( -3.93208 3.93514 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.05928e-08 ( -3.49456e-09 3.5009e-09 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.948449 ( -0.90479 0.763173 )
Epeak [keV] : 20.1617 ( -11.3256 5.88815 )
Norm@50keV : 2.93413 ( -2.93509 7.79835 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.16 using 59 PHA bins.
# Reduced chi-squared = 0.8600 for 56 degrees of freedom
# Null hypothesis probability = 7.626864e-01
Photon flux (15-150 keV) in 0.02 sec: 45.3855 ( -3.9773 3.9787 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.01428e-08 ( 0 0 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.947396 ( -0.66831 1.00623 )
beta : -10.0000 ( 10 1.77636e-15 )
Epeak [keV] : 20.1627 ( -6.15348 5.87955 )
Norm@50keV : 2.93925 ( -2.93925 7.82861 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.16 using 59 PHA bins.
# Reduced chi-squared = 0.8756 for 55 degrees of freedom
# Null hypothesis probability = 7.314582e-01
Photon flux (15-150 keV) in 0.02 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) = 1.36e-08
S(50-100 keV) = 6.90e-09
T90 vs. Hardness ratio plot
T90 = 0.0159999132156372 sec.
Hardness ratio (energy fluence ratio) = 0.507353
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.75492
Count Ratio (50-100 keV) / (15-25 keV) = 0.172206
Mask shadow pattern
IMX = -6.877126287707372E-05, IMY = 4.191653779261470E-04
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.008000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.008000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.008000
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:
-179.572000 -0.004000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.6299 35.2856 8.9 36.5 86.7 -0.5932 -1.3 9.1 Her X-1
263.0882 -24.7914 10.1 55.4 0.6 0.7584 1.1 5.1 GX 1+4
268.2545 -1.5567 12.4 34.2 16.3 -0.1930 -0.9 9.2 SW J1753.5-0127
270.1901 -25.0373 15.9 52.2 -6.3 0.2872 0.7 5.7 GX 5-1
270.3116 -25.6960 4.1 52.7 -6.8 1.1601 2.8 2.9 GRS 1758-258
274.0413 -13.9894 5.2 40.7 -3.5 0.5159 2.2 3.5 GX 17+2
275.8671 -30.2873 34.0 54.9 -14.7 -0.1789 -0.3 5.6 H1820-303
285.1249 -24.8316 10.9 47.5 -23.0 0.3446 1.1 7.2 HT1900.1-2455
288.7786 10.9579 0.9 11.9 -9.5 2.0034 12.2 1.4 GRS 1915+105
299.5690 35.2039 1.2 14.3 166.3 1.4132 9.3 1.1 Cyg X-1
308.0930 40.9341 2.9 22.6 175.7 0.6081 4.0 1.4 Cyg X-3
326.1362 38.3390 4.4 32.3 -161.5 0.5002 2.6 2.0 Cyg X-2
312.6846 38.1971 3.0 23.1 -172.8 0.5996 3.9 ------ UNKNOWN
277.2860 -23.7984 2.6 48.4 -13.3 1.3561 4.4 ------ UNKNOWN
315.1910 -16.4527 2.9 43.8 -64.1 3.1159 4.0 ------ UNKNOWN
334.7259 6.9137 2.6 42.3 -109.1 3.0433 4.5 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.004000 0.016000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.2863 35.4032 11.2 36.8 86.8 0.0154 1.0 9.1 Her X-1
262.9793 -24.6753 33.1 55.3 0.8 0.0074 0.3 4.5 GX 1+4
268.2766 -1.4235 11.8 34.1 16.5 -0.0063 -1.0 5.8 SW J1753.5-0127
270.3338 -25.0483 3.4 52.1 -6.5 -0.0436 -3.4 3.3 GX 5-1
270.3650 -25.8002 6.9 52.8 -6.9 0.0219 1.7 4.8 GRS 1758-258
274.0517 -13.8881 5.7 40.6 -3.5 0.0152 2.0 9.3 GX 17+2
275.9015 -30.5165 8.6 55.1 -14.8 0.0266 1.5 9.1 H1820-303
285.2162 -24.9066 5.9 47.5 -23.1 0.0200 1.9 9.8 HT1900.1-2455
288.7516 10.7976 21.4 12.1 -9.7 -0.0024 -0.5 9.3 GRS 1915+105
299.3363 35.1671 0.0 14.2 165.6 -0.0021 -0.4 12.6 Cyg X-1
308.1013 40.7601 9.8 22.4 176.0 0.0058 1.2 11.6 Cyg X-3
325.9694 38.3284 4.8 32.1 -161.6 -0.0137 -2.4 9.5 Cyg X-2
256.6983 -20.2473 2.4 55.5 9.7 0.1455 4.8 ------ UNKNOWN
293.7216 21.8898 0.5 0.0 -99.3 0.1134 23.7 ------ UNKNOWN
318.4222 41.7377 2.3 28.7 -173.0 0.0257 5.0 ------ UNKNOWN
357.6739 51.9284 2.1 57.0 -172.2 0.1176 5.5 ------ UNKNOWN
302.4620 -12.7001 2.4 35.7 -48.3 0.0366 4.7 ------ UNKNOWN
346.8010 21.8291 2.9 49.0 -134.0 0.0917 3.9 ------ UNKNOWN
314.9057 -16.7933 1.9 43.9 -63.5 0.1278 6.0 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
-179.572000 602.485600
720.428000 782.536300
900.428000 962.467600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.6059 35.2039 150.2 36.5 86.5 -0.1069 -0.1 11.0 Her X-1
263.1573 -24.6983 5.1 55.2 0.6 4.2312 2.3 8.6 GX 1+4
268.2992 -1.3191 7.1 34.0 16.6 1.0916 1.6 9.0 SW J1753.5-0127
270.0938 -25.1480 0.0 52.3 -6.3 1.2291 0.9 11.1 GX 5-1
270.3187 -25.7315 3.9 52.8 -6.9 3.9602 3.0 1.1 GRS 1758-258
274.0219 -14.0243 2.7 40.8 -3.5 3.2476 4.3 1.2 GX 17+2
275.8673 -30.2872 87.5 54.9 -14.7 -0.2212 -0.1 5.6 H1820-303
284.9921 -24.8410 7.7 47.5 -22.8 1.5312 1.5 5.3 HT1900.1-2455
288.7922 10.9541 0.8 11.9 -9.5 7.9180 15.2 0.6 GRS 1915+105
299.5903 35.2074 0.8 14.3 166.3 7.4985 14.6 0.3 Cyg X-1
308.0306 40.9823 2.0 22.6 175.6 3.0046 5.9 4.0 Cyg X-3
326.1867 38.3357 3.0 32.3 -161.5 2.2863 3.8 1.1 Cyg X-2
297.3654 30.2112 1.7 8.9 167.3 3.2470 6.7 ------ UNKNOWN
287.7982 0.5919 1.5 22.1 -17.7 3.4091 7.5 ------ UNKNOWN
322.9045 -7.5758 3.2 41.1 -80.9 8.9331 3.6 ------ UNKNOWN
344.8913 18.4014 3.2 48.0 -129.0 9.6239 3.6 ------ UNKNOWN
Plot creation:
Sat Mar 14 17:37:40 EDT 2015