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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
237.0369 -15.9708 0.0134 31.2844 -40.4363 1.0985708 14.324 TRIG_00355942
Foreground time interval of the image:
-25.092 3.992 (delta_t = 29.084 [sec])
Background time interval of the image:
-239.896 -25.092 (delta_t = 214.804 [sec])
Lightcurves
Notes:
- 1) The mask-weighted light curves are using the flight position.
- 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)
Quad-rate summed light curves (from T0-300s to T0+1000s)
Spectral Evolution
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) When the burst includes telescope slew time periods, the fitting uses an average response file made from multiple 5-s response files through out the slew time plus single time preiod for the non-slew times, and weighted by the total counts in the corresponding time period using addrmf. An average response file is needed becuase a spectral fit using 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.
Time averaged spectrum fit using the average DRM
Power-law model
Time interval is from -25.092 sec. to 3.992 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.37950 ( -0.198477 0.19625 )
Norm@50keV : 2.48626E-03 ( -0.0002598 0.000259618 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.95 using 59 PHA bins.
# Reduced chi-squared = 0.7886 for 57 degrees of freedom
# Null hypothesis probability = 8.761089e-01
Photon flux (15-150 keV) in 29.08 sec: 0.301401 ( -0.0333446 0.0334797 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.01604e-07 ( -7.9947e-08 8.05077e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -25.092 sec. to 3.992 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.37587 ( -0.199845 0.197827 )
Epeak [keV] : 9999.29 ( -9999.36 -9999.36 )
Norm@50keV : 2.49537E-03 ( -0.00249535 0.00151991 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.97 using 59 PHA bins.
# Reduced chi-squared = 0.8029 for 56 degrees of freedom
# Null hypothesis probability = 8.545572e-01
Photon flux (15-150 keV) in 29.08 sec: 0.302093 ( -0.034061 0.032738 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.98129e-07 ( -7.68003e-08 8.26715e-08 ) ergs/cm2
Band function
Time interval is from -25.092 sec. to 3.992 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.91021 ( -4.91021 -4.91021 )
beta : -1.41265 ( -0.216063 0.209745 )
Epeak [keV] : 22.4941 ( -22.4941 6.77159 )
Norm@50keV : 382.149 ( -39.8283 1.06832e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.56 using 59 PHA bins.
# Reduced chi-squared = 0.8102 for 55 degrees of freedom
# Null hypothesis probability = 8.417945e-01
Photon flux (15-150 keV) in 29.08 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] : 18.6660 (-2.81585 3.42426)
R^2/D10^2 : 1.58579E-02 (-0.00680306 0.011812)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.16 using 59 PHA bins.
# Reduced chi-squared = 1.336 for 57 degrees of freedom
# Null hypothesis probability = 4.588787e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.178e-08 7.299e-09
25- 50 1.509e-07 2.822e-08
50-150 3.851e-07 7.808e-08
15-150 5.678e-07 8.506e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 1.25084 (-0.13162 0.131594)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.05 using 59 PHA bins.
# Reduced chi-squared = 0.8605 for 57 degrees of freedom
# Null hypothesis probability = 7.639283e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.058e-08 2.162e-08
25- 50 1.743e-07 8.763e-08
50-150 3.822e-07 2.089e-07
15-150 6.470e-07 3.263e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.07050 (-1.36562 1.84397)
R1^2/D10^2 : 0.559131 (-0.353669 1.01155)
kT2 [keV] : 30.7953 (-6.85771 13.4985)
R2^2/D10^2 : 2.67099E-03 (-0.0017601 0.00340852)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.04 using 59 PHA bins.
# Reduced chi-squared = 0.7644 for 55 degrees of freedom
# Null hypothesis probability = 9.004069e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.229e-08 4.724e-08
25- 50 1.535e-07 5.563e-08
50-150 4.764e-07 2.288e-07
15-150 7.222e-07 2.759e-07
Peak spectrum fit
Power-law model
Time interval is from 0.052 sec. to 1.052 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.44642 ( -0.221175 0.221478 )
Norm@50keV : 1.19734E-02 ( -0.00158239 0.00157672 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.16 using 59 PHA bins.
# Reduced chi-squared = 0.8625 for 57 degrees of freedom
# Null hypothesis probability = 7.604187e-01
Photon flux (15-150 keV) in 1 sec: 1.47425 ( -0.196336 0.196836 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.14653e-07 ( -1.64849e-08 1.6688e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.052 sec. to 1.052 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.716491 ( -1.10591 0.818785 )
Epeak [keV] : 86.8606 ( -27.0991 -86.8607 )
Norm@50keV : 2.81887E-02 ( -0.0169891 0.0728312 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.17 using 59 PHA bins.
# Reduced chi-squared = 0.8423 for 56 degrees of freedom
# Null hypothesis probability = 7.935652e-01
Photon flux (15-150 keV) in 1 sec: 1.42882 ( -0.20431 0.20436 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.08251e-07 ( -1.83653e-08 1.8519e-08 ) ergs/cm2
Band function
Time interval is from 0.052 sec. to 1.052 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.51245 ( -6.11636 -4.51245 )
beta : -1.64649 ( -0.317919 0.283889 )
Epeak [keV] : 30.1794 ( -8.95351 7.6381 )
Norm@50keV : 188.043 ( -24.2059 4.37067e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.51 using 59 PHA bins.
# Reduced chi-squared = 0.8456 for 55 degrees of freedom
# Null hypothesis probability = 7.855061e-01
Photon flux (15-150 keV) in 1 sec: 1.42768 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.10565e-07 ( -1.10558e-07 -1.71984e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.9560 (-2.25138 2.77659)
R^2/D10^2 : 0.172315 (-0.0777626 0.134624)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.70 using 59 PHA bins.
# Reduced chi-squared = 0.9772 for 57 degrees of freedom
# Null hypothesis probability = 5.238541e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.073e-09 1.926e-09
25- 50 3.199e-08 6.460e-09
50-150 4.864e-08 1.300e-08
15-150 8.870e-08 1.756e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.362 (-74.3223 -199.363)
Norm : 6.09264 (-0.788327 0.789817)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.45 using 59 PHA bins.
# Reduced chi-squared = 0.8499 for 57 degrees of freedom
# Null hypothesis probability = 7.828469e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.517e-08 8.500e-09
25- 50 2.918e-08 1.617e-08
50-150 6.401e-08 3.581e-08
15-150 1.084e-07 6.015e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.38487 (-3.33789 3.96029)
R1^2/D10^2 : 0.809654 (-0.517001 3.1181)
kT2 [keV] : 27.7469 (-22.7004 95.6577)
R2^2/D10^2 : 1.44191E-02 (-0.0138636 0.062876)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.25 using 59 PHA bins.
# Reduced chi-squared = 0.8409 for 55 degrees of freedom
# Null hypothesis probability = 7.935222e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.245e-08 7.100e-09
25- 50 3.102e-08 1.631e-08
50-150 6.677e-08 3.748e-08
15-150 1.102e-07 5.700e-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: 1.37950 ( -0.198477 0.19625 )
Norm@50keV : 2.48626E-03 ( -0.0002598 0.000259618 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.95 using 59 PHA bins.
# Reduced chi-squared = 0.7886 for 57 degrees of freedom
# Null hypothesis probability = 8.761089e-01
Photon flux (15-150 keV) in 29.08 sec: 0.301401 ( -0.0333446 0.0334797 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.01604e-07 ( -7.9947e-08 8.05077e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.37587 ( -0.199845 0.197827 )
Epeak [keV] : 9999.29 ( -9999.36 -9999.36 )
Norm@50keV : 2.49537E-03 ( -0.00249535 0.00151991 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.97 using 59 PHA bins.
# Reduced chi-squared = 0.8029 for 56 degrees of freedom
# Null hypothesis probability = 8.545572e-01
Photon flux (15-150 keV) in 29.08 sec: 0.302093 ( -0.03406 0.032738 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.98129e-07 ( -7.68003e-08 8.26715e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.91021 ( -4.91021 -4.91021 )
beta : -1.41265 ( -0.216063 0.209745 )
Epeak [keV] : 22.4941 ( -22.4941 6.77159 )
Norm@50keV : 382.149 ( -39.8283 1.06832e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.56 using 59 PHA bins.
# Reduced chi-squared = 0.8102 for 55 degrees of freedom
# Null hypothesis probability = 8.417945e-01
Photon flux (15-150 keV) in 29.08 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) = 1.63e-07
S(50-100 keV) = 2.51e-07
T90 vs. Hardness ratio plot
T90 = 24.944000005722 sec.
Hardness ratio (energy fluence ratio) = 1.53988
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.24989
Count Ratio (50-100 keV) / (15-25 keV) = 1.24069
Mask shadow pattern
IMX = 4.624901037000976E-01, IMY = 3.941150020758289E-01
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:
-239.896000 -25.092000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9828 -15.6480 0.3 25.6 -29.5 6.2874 34.2 0.5 Sco X-1
255.9961 -37.8480 3.7 10.3 -100.8 0.5867 3.1 0.5 4U 1700-377
256.4227 -36.4094 4.2 9.4 -94.2 0.5291 2.7 1.0 GX 349+2
263.1038 -24.7919 3.6 8.0 2.3 0.5755 3.3 5.9 GX 1+4
264.7357 -44.2895 4.7 12.2 -148.5 0.4140 2.4 9.6 4U 1735-44
268.3092 -1.4786 3.1 30.8 28.8 0.9363 3.7 3.9 SW J1753.5-0127
270.2738 -25.0657 2.0 7.8 50.9 1.0220 5.8 1.0 GX 5-1
270.2148 -25.7557 2.6 7.2 52.7 0.8128 4.5 4.8 GRS 1758-258
274.1050 -13.9109 6.0 19.5 47.8 0.3563 1.9 9.5 GX 17+2
275.9228 -30.3050 2.5 8.2 104.5 0.7858 4.6 3.7 H1820-303
285.0466 -24.7857 125.3 17.8 95.5 -0.0195 -0.1 8.1 HT1900.1-2455
263.0095 -33.7945 2.7 3.4 -93.9 0.7831 4.3 2.6 GX 354-0
314.7781 -26.7394 2.4 42.0 120.8 3.4014 4.8 ------ UNKNOWN
277.5703 -23.8230 2.4 12.8 77.4 0.8729 4.7 ------ UNKNOWN
249.6566 19.6266 2.7 54.3 5.7 2.9084 4.3 ------ UNKNOWN
255.1453 -41.7102 2.0 13.2 -114.2 1.1641 5.8 ------ UNKNOWN
354.5567 -75.6645 2.6 58.4 -171.5 4.7639 4.4 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-25.092000 3.992000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9683 -15.4890 5.2 25.8 -29.3 0.1425 2.2 9.1 Sco X-1
255.8690 -38.0323 0.0 10.5 -101.4 0.0575 1.0 12.6 4U 1700-377
256.3510 -36.6041 5.0 9.5 -95.1 0.1332 2.3 11.6 GX 349+2
262.8451 -24.7758 8.8 8.1 0.7 0.0732 1.3 9.1 GX 1+4
264.8061 -44.2675 5.5 12.1 -148.7 -0.1207 -2.1 11.3 4U 1735-44
268.2219 -1.4669 5.8 30.8 28.6 -0.1511 -2.0 8.8 SW J1753.5-0127
270.3302 -25.0987 5.9 7.8 51.3 -0.1077 -1.9 2.8 GX 5-1
270.2703 -25.8046 3.5 7.2 53.3 -0.1871 -3.3 4.1 GRS 1758-258
273.9427 -14.2229 4.8 19.2 47.6 0.1592 2.4 11.8 GX 17+2
275.9957 -30.5034 10.0 8.2 106.0 -0.0628 -1.1 9.0 H1820-303
285.0619 -25.0221 6.6 17.7 96.2 0.1131 1.7 6.3 HT1900.1-2455
262.7917 -33.7425 3.8 3.5 -91.8 -0.1777 -3.1 11.3 GX 354-0
237.0369 -15.9708 0.8 31.3 -40.4 1.0988 14.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
194.604600 882.804600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.3121 -60.6244 4.1 42.8 -25.1 1.8090 2.8 0.1 Cen X-3
186.6338 -62.8007 2.2 38.9 -14.4 2.8956 5.4 1.9 GX 301-2
264.7477 -44.5013 11.4 39.2 62.9 1.2507 1.0 3.1 4U 1735-44
296.1963 -36.8415 3.0 40.4 102.2 6.0122 3.9 ------ UNKNOWN
353.6936 -53.3783 3.3 25.2 -178.0 1.4112 3.5 ------ UNKNOWN
27.8627 -38.5963 3.0 46.8 -147.3 3.6466 3.8 ------ UNKNOWN
Plot creation:
Sun May 31 03:41:56 EDT 2015