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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
135.5956 -40.4484 0.0221 19.2 176.3 -0.6233 -8.7 TRIG_00618134
------------------------------------------
Foreground time interval of the image:
41.376 73.501 (delta_t = 32.125 [sec])
Background time interval of the image:
-18.499 41.376 (delta_t = 59.875 [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 64.000000
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 64.000000
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 64.000000
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 41.376 sec. to 99.296 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.33179 ( -0.994242 1.86992 )
Norm@50keV : 1.07082E-04 ( -0.000106793 0.000145506 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.09 using 59 PHA bins.
# Reduced chi-squared = 0.8963 for 57 degrees of freedom
# Null hypothesis probability = 6.953611e-01
Photon flux (15-150 keV) in 57.92 sec: 3.78435E-02 ( -0.0168574 0.017264 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.82585e-08 ( -4.73358e-08 6.01268e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 41.376 sec. to 99.296 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.870416 ( )
Epeak [keV] : 13.6061 ( )
Norm@50keV : 5.94684E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.24 using 59 PHA bins.
# Reduced chi-squared = 0.8971 for 56 degrees of freedom
# Null hypothesis probability = 6.916828e-01
Photon flux (15-150 keV) in 57.92 sec: 3.97196E-02 ( -0.0165302 0.0165334 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.78531e-08 ( -4.19125e-08 4.84906e-08 ) ergs/cm2
Band function
Time interval is from 41.376 sec. to 99.296 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.976004 ( -6.95603 0.943279 )
beta : -9.37167 ( 9.37167 19.371 )
Epeak [keV] : 12.9442 ( -10.5505 16.4302 )
Norm@50keV : 4.97783E-03 ( -0.00611701 609711 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.25 using 59 PHA bins.
# Reduced chi-squared = 0.9137 for 55 degrees of freedom
# Null hypothesis probability = 6.563149e-01
Photon flux (15-150 keV) in 57.92 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] : 5.63471 (-2.44313 2.48385)
R^2/D10^2 : 0.206817 (-0.206817 2.79436)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.43 using 59 PHA bins.
# Reduced chi-squared = 0.8847 for 57 degrees of freedom
# Null hypothesis probability = 7.183864e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.591e-08 2.720e-08
25- 50 3.981e-08 2.710e-08
50-150 2.798e-09 2.832e-09
15-150 8.852e-08 5.809e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.3161 (-8.9944 19.6453)
Norm : 0.692050 (-0.43991 2.51916)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.32 using 59 PHA bins.
# Reduced chi-squared = 0.8827 for 57 degrees of freedom
# Null hypothesis probability = 7.221556e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.771e-08 2.948e-08
25- 50 3.319e-08 2.228e-08
50-150 6.098e-09 7.060e-09
15-150 8.700e-08 5.917e-08
Double BB
R1^2/D10^2 : 94.7827 ( )
kT2 [keV] : 6.52625 (-2.75975 -6.44598)
R2^2/D10^2 : 9.21429E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.53 using 59 PHA bins.
#Fit statistic : Chi-Squared = 49.50 using 59 PHA bins.
#Fit statistic : Chi-Squared = 49.47 using 59 PHA bins.
# Reduced chi-squared = 0.9006 for 55 degrees of freedom
# Reduced chi-squared = 0.8999 for 55 degrees of freedom
# Reduced chi-squared = 0.8995 for 55 degrees of freedom
# Null hypothesis probability = 6.827609e-01
# Null hypothesis probability = 6.841413e-01
# Null hypothesis probability = 6.850198e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.538e-08 2.319e-08
25- 50 3.960e-08 2.474e-08
50-150 5.297e-09 3.718e-09
15-150 9.029e-08 5.780e-08
Peak spectrum fit
Power-law model
Time interval is from 61.452 sec. to 62.452 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.14090 ( -1.04914 1.84705 )
Norm@50keV : 1.51988E-03 ( -0.00127559 0.00119772 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.82 using 59 PHA bins.
# Reduced chi-squared = 0.8565 for 57 degrees of freedom
# Null hypothesis probability = 7.711496e-01
Photon flux (15-150 keV) in 1 sec: 0.244059 ( -0.135933 0.136142 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.41827e-08 ( -9.50236e-09 1.11223e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 61.452 sec. to 62.452 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.56859 ( )
Epeak [keV] : 32.1650 ( )
Norm@50keV : 3.21085E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.78 using 59 PHA bins.
# Reduced chi-squared = 0.8710 for 56 degrees of freedom
# Null hypothesis probability = 7.423129e-01
Photon flux (15-150 keV) in 1 sec: 0.241695 ( -0.134844 0.136993 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.36364e-08 ( -8.99106e-09 9.0283e-09 ) ergs/cm2
Band function
Time interval is from 61.452 sec. to 62.452 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5 -5 )
beta : -2.19863 ( -3.06902 1.08525 )
Epeak [keV] : 16.7397 ( -16.3074 31.3098 )
Norm@50keV : 4317.19 ( -2367.39 1.09809e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.76 using 59 PHA bins.
# Reduced chi-squared = 0.8865 for 55 degrees of freedom
# Null hypothesis probability = 7.105596e-01
Photon flux (15-150 keV) in 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] : 10.4812 (-10.4864 9.85815)
R^2/D10^2 : 9.77978E-02 (-0.0975889 9.75267)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.49 using 59 PHA bins.
# Reduced chi-squared = 0.8683 for 57 degrees of freedom
# Null hypothesis probability = 7.495905e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.220e-09 1.554e-09
25- 50 5.889e-09 4.032e-09
50-150 3.516e-09 3.038e-09
15-150 1.162e-08 8.580e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 54.1853 (-54.1853 -54.1853)
Norm : 1.34354 (-0.743209 0.75669)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.79 using 59 PHA bins.
# Reduced chi-squared = 0.8560 for 57 degrees of freedom
# Null hypothesis probability = 7.721169e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.342e-09 2.553e-09
25- 50 4.934e-09 4.431e-09
50-150 5.157e-09 9.360e-09
15-150 1.343e-08 1.580e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.74908 (-2.64534 14.9406)
R1^2/D10^2 : 20.3941 (-22.1194 -22.1194)
kT2 [keV] : 13.2111 (-7.06427 -13.2032)
R2^2/D10^2 : 3.44052E-02 (-0.0344206 0.604295)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.99 using 59 PHA bins.
# Reduced chi-squared = 0.8725 for 55 degrees of freedom
# Null hypothesis probability = 7.372822e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.443e-09 1.664e-09
25- 50 4.692e-09 3.146e-09
50-150 4.969e-09 4.113e-09
15-150 1.310e-08 8.210e-09
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: 3.29755 ( -1.16578 2.47783 )
Norm@50keV : 1.17405E-04 ( -0.000116459 0.000190855 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.12 using 59 PHA bins.
# Reduced chi-squared = 0.9670 for 57 degrees of freedom
# Null hypothesis probability = 5.460374e-01
Photon flux (15-150 keV) in 32.12 sec: 4.03017E-02 ( -0.0223059 0.0230497 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.23951e-08 ( -3.35776e-08 4.47615e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.03656E-02 ( )
Epeak [keV] : 18.4127 ( )
Norm@50keV : 2.89050E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.06 using 59 PHA bins.
# Reduced chi-squared = 0.9654 for 56 degrees of freedom
# Null hypothesis probability = 5.484634e-01
Photon flux (15-150 keV) in 32.12 sec: 4.37578E-02 ( -0.0218717 0.0219313 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.42324e-08 ( -3.01927e-08 3.30345e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.50704 ( -13.1704 -4.50704 )
beta : -9.99087 ( 9.99087 18.6398 )
Epeak [keV] : 24.7754 ( -11.1425 9.83243 )
Norm@50keV : 31.6300 ( -15.9305 5108.47 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.41 using 59 PHA bins.
# Reduced chi-squared = 0.9893 for 55 degrees of freedom
# Null hypothesis probability = 4.970229e-01
Photon flux (15-150 keV) in 32.12 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) = 2.82e-08
S(50-100 keV) = 1.12e-08
T90 vs. Hardness ratio plot
T90 = 53.1840000152588 sec.
Hardness ratio (energy fluence ratio) = 0.397163
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.1771
Count Ratio (50-100 keV) / (15-25 keV) = -0.528025
Mask shadow pattern
IMX = -3.479544465074932E-01, IMY = -2.239458550550413E-02
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
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:
-18.499400 41.376000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5903 -40.4453 0.7 19.2 176.3 1.4595 16.0 7.1 Vela X-1
170.0888 -60.5654 8.0 20.5 -88.1 0.1513 1.4 7.5 Cen X-3
186.6520 -62.6114 1.3 27.5 -77.7 1.0564 8.7 9.5 GX 301-2
81.6048 -36.4671 2.6 37.7 85.8 1.3410 4.5 ------ UNKNOWN
152.4946 -58.1624 1.6 12.4 -104.2 0.6725 7.4 ------ UNKNOWN
236.3110 -66.7510 2.8 43.3 -53.2 1.0556 4.1 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
41.376000 73.500590
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5956 -40.4484 1.3 19.2 176.3 -0.6233 -8.7 7.1 Vela X-1
170.5268 -60.4452 0.0 20.7 -88.3 0.1618 1.9 12.4 Cen X-3
187.0783 -62.8030 0.0 27.6 -77.2 -0.0595 -0.6 11.7 GX 301-2
119.4905 -11.8144 2.3 47.8 148.0 1.3289 5.0 ------ UNKNOWN
160.5916 -40.0299 2.1 27.7 -139.3 0.4512 5.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
114.500590 233.700000
235.000000 243.036800
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.6025 -40.4260 1.0 0.1 -7.8 1.4971 11.1 8.4 Vela X-1
170.5752 -60.5365 10.5 29.4 -47.7 0.1861 1.1 9.2 Cen X-3
186.5398 -62.6445 1.2 37.3 -48.8 2.1654 9.3 8.2 GX 301-2
97.9619 -16.3856 3.1 40.4 102.6 2.1631 3.7 ------ UNKNOWN
108.3929 -66.8642 2.7 30.5 8.0 0.6639 4.2 ------ UNKNOWN
133.5443 -60.1121 2.9 19.8 -9.7 0.5273 4.0 ------ UNKNOWN
152.4655 -58.1345 1.7 20.8 -38.3 0.9072 6.6 ------ UNKNOWN
180.6185 -20.1560 2.2 43.2 -116.9 2.8550 5.2 ------ UNKNOWN
198.7685 -52.7671 2.4 43.6 -64.2 2.7654 4.9 ------ UNKNOWN
Plot creation:
Mon Nov 10 10:08:28 EST 2014