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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
220.2552 -2.4968 0.0071 48.4160 -164.1737 1.9889316 27.174 TRIG_00565263
Foreground time interval of the image:
0.140 10.741 (delta_t = 10.601 [sec])
Background time interval of the image:
-176.459 0.140 (delta_t = 176.599 [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 0.512000
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 0.512000
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 0.512000
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)
The mask-weighted light curves based on cleaned DPHs
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 0.140 sec. to 45.760 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.64546 ( -0.141344 0.143139 )
Norm@50keV : 3.30444E-03 ( -0.00027469 0.00027368 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.75 using 59 PHA bins.
# Reduced chi-squared = 0.8202 for 57 degrees of freedom
# Null hypothesis probability = 8.317438e-01
Photon flux (15-150 keV) in 45.62 sec: 0.430836 ( -0.0369092 0.0370341 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.40266e-06 ( -1.22101e-07 1.22648e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.140 sec. to 45.760 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.16658 ( -0.690248 0.538435 )
Epeak [keV] : 88.5508 ( -26.7605 -88.5573 )
Norm@50keV : 5.71953E-03 ( -0.0018979 0.0067319 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.90 using 59 PHA bins.
# Reduced chi-squared = 0.8018 for 56 degrees of freedom
# Null hypothesis probability = 8.561503e-01
Photon flux (15-150 keV) in 45.62 sec: 0.420628 ( -0.039 0.039086 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.36217e-06 ( -1.35122e-07 1.33703e-07 ) ergs/cm2
Band function
Time interval is from 0.140 sec. to 45.760 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.653542 ( -1.06325 2.47619 )
beta : -1.94581 ( 1.94262 0.33381 )
Epeak [keV] : 59.3052 ( -28.0832 302.02 )
Norm@50keV : 1.13936E-02 ( -0.00723189 0.342393 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.96 using 59 PHA bins.
# Reduced chi-squared = 0.7993 for 55 degrees of freedom
# Null hypothesis probability = 8.571612e-01
Photon flux (15-150 keV) in 45.62 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.35783e-06 ( -1.35751e-06 -1.30934e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.0391 (-1.3058 1.47189)
R^2/D10^2 : 6.01446E-02 (-0.0184595 0.0259721)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.79 using 59 PHA bins.
# Reduced chi-squared = 1.242 for 57 degrees of freedom
# Null hypothesis probability = 1.035735e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.142e-07 1.827e-08
25- 50 4.259e-07 4.731e-08
50-150 5.536e-07 9.204e-08
15-150 1.094e-06 1.004e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 157.601 (-47.7316 -157.635)
Norm : 1.77240 (-0.166985 0.192904)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.95 using 59 PHA bins.
# Reduced chi-squared = 0.7886 for 57 degrees of freedom
# Null hypothesis probability = 8.761178e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.068e-07 2.644e-08
25- 50 3.860e-07 9.336e-08
50-150 7.772e-07 3.320e-07
15-150 1.370e-06 4.489e-07
Double BB
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.73 using 59 PHA bins.
#Fit statistic : Chi-Squared = 54.58 using 59 PHA bins.
#Fit statistic : Chi-Squared = 45.45 using 59 PHA bins.
#Fit statistic : Chi-Squared = 45.43 using 59 PHA bins.
# Reduced chi-squared = 0.9951 for 55 degrees of freedom
# Reduced chi-squared = 0.9924 for 55 degrees of freedom
# Reduced chi-squared = 0.8264 for 55 degrees of freedom
# Reduced chi-squared = 0.8260 for 55 degrees of freedom
# Null hypothesis probability = 4.848975e-01
# Null hypothesis probability = 4.904761e-01
# Null hypothesis probability = 8.171443e-01
# Null hypothesis probability = 8.178165e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.020e-07 7.717e-08
25- 50 3.749e-07 5.458e-08
50-150 6.346e-07 1.072e-07
15-150 1.211e-06 1.626e-07
Peak spectrum fit
Power-law model
Time interval is from 2.084 sec. to 3.084 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.33568 ( -0.115636 0.115231 )
Norm@50keV : 4.19178E-02 ( -0.0030472 0.00304719 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.39 using 59 PHA bins.
# Reduced chi-squared = 0.9893 for 57 degrees of freedom
# Null hypothesis probability = 4.979451e-01
Photon flux (15-150 keV) in 1 sec: 5.03525 ( -0.384238 0.385151 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.10738e-07 ( -3.16565e-08 3.1727e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.084 sec. to 3.084 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.207019 ( -0.656401 0.568719 )
Epeak [keV] : 85.6728 ( -14.3274 34.0318 )
Norm@50keV : 0.143942 ( -0.0655772 0.145645 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.55 using 59 PHA bins.
# Reduced chi-squared = 0.7777 for 56 degrees of freedom
# Null hypothesis probability = 8.873401e-01
Photon flux (15-150 keV) in 1 sec: 4.85861 ( -0.39354 0.39442 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.93026e-07 ( -3.4199e-08 3.3942e-08 ) ergs/cm2
Band function
Time interval is from 2.084 sec. to 3.084 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.532516 ( -0.980901 3.99887 )
beta : -1.93691 ( -1.00886 0.383986 )
Epeak [keV] : 64.2185 ( -21.3719 28.09 )
Norm@50keV : 0.378001 ( -0.439967 112.341 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.66 using 59 PHA bins.
# Reduced chi-squared = 0.7393 for 55 degrees of freedom
# Null hypothesis probability = 9.255293e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.94766e-07 ( -3.94759e-07 -3.332e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 17.0729 (-1.31465 1.45934)
R^2/D10^2 : 0.403028 (-0.10107 0.130453)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.30 using 59 PHA bins.
# Reduced chi-squared = 1.023 for 57 degrees of freedom
# Null hypothesis probability = 4.272216e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.390e-08 3.190e-09
25- 50 1.061e-07 1.041e-08
50-150 2.211e-07 2.865e-08
15-150 3.511e-07 3.130e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 21.2660 (-1.55349 1.55329)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.12 using 59 PHA bins.
# Reduced chi-squared = 1.072 for 57 degrees of freedom
# Null hypothesis probability = 3.304082e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.295e-08 4.770e-09
25- 50 1.019e-07 9.410e-09
50-150 2.234e-07 4.885e-08
15-150 3.782e-07 5.920e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 12.5762 (-3.06831 2.64109)
R1^2/D10^2 : 0.872536 (-0.35835 0.787216)
kT2 [keV] : 47.2914 (-21.3278 -46.2485)
R2^2/D10^2 : 7.52063E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.26 using 59 PHA bins.
#Fit statistic : Chi-Squared = 40.24 using 59 PHA bins.
# Reduced chi-squared = 0.7321 for 55 degrees of freedom
# Reduced chi-squared = 0.7317 for 55 degrees of freedom
# Null hypothesis probability = 9.318328e-01
# Null hypothesis probability = 9.321581e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.145e-08 8.770e-09
25- 50 1.107e-07 3.171e-08
50-150 2.536e-07 1.159e-07
15-150 3.957e-07 1.569e-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: 1.53357 ( -0.10157 0.101833 )
Norm@50keV : 1.24633E-02 ( -0.000751355 0.000751057 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.60 using 59 PHA bins.
# Reduced chi-squared = 0.8876 for 57 degrees of freedom
# Null hypothesis probability = 7.125208e-01
Photon flux (15-150 keV) in 10.6 sec: 1.57038 ( -0.1012 0.101529 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.2467e-06 ( -7.89146e-08 7.90858e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.846474 ( -0.485624 0.437055 )
Epeak [keV] : 89.5289 ( -17.7433 62.1486 )
Norm@50keV : 2.65302E-02 ( -0.00994182 0.0181302 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.03 using 59 PHA bins.
# Reduced chi-squared = 0.7684 for 56 degrees of freedom
# Null hypothesis probability = 8.982001e-01
Photon flux (15-150 keV) in 10.6 sec: 1.51897 ( -0.10566 0.10604 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.20618e-06 ( -8.4694e-08 8.41852e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.846411 ( -0.317989 0.454926 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 89.5111 ( -13.5644 62.1365 )
Norm@50keV : 2.65307E-02 ( -0.00993818 0.0181505 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.03 using 59 PHA bins.
# Reduced chi-squared = 0.7823 for 55 degrees of freedom
# Null hypothesis probability = 8.793858e-01
Photon flux (15-150 keV) in 10.6 sec: 1.52327 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.20525e-06 ( -1.20518e-06 -8.27118e-08 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 3.71e-07
S(50-100 keV) = 4.74e-07
T90 vs. Hardness ratio plot
T90 = 43.5719999074936 sec.
Hardness ratio (energy fluence ratio) = 1.27763
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.48254
Count Ratio (50-100 keV) / (15-25 keV) = 1.03717
Mask shadow pattern
IMX = -1.084240024452158E+00, IMY = 3.073460639511227E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000
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:
-176.459390 0.140000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9709 -15.6435 1.6 53.9 160.7 5.4327 7.2 0.5 Sco X-1
254.4403 35.2967 0.9 5.3 96.3 1.4428 12.5 2.9 Her X-1
268.2035 -1.4397 18.5 43.4 127.3 -0.3675 -0.6 9.9 SW J1753.5-0127
299.4916 35.0793 6.6 40.3 54.4 0.7115 1.7 8.8 Cyg X-1
308.1693 40.9890 7.4 45.0 43.0 0.6965 1.5 3.5 Cyg X-3
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.140000 10.740590
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.8434 -15.7381 8.5 54.0 160.9 -0.2693 -1.4 9.8 Sco X-1
254.4039 35.2763 7.5 5.3 96.7 0.0437 1.5 4.8 Her X-1
268.4650 -1.5017 5.2 43.6 127.0 -0.3341 -2.2 6.5 SW J1753.5-0127
299.5898 35.2008 27.8 40.4 54.2 0.0412 0.4 0.1 Cyg X-1
308.0246 40.7695 29.3 45.0 43.3 0.0437 0.4 11.7 Cyg X-3
260.2502 7.9378 2.9 31.9 134.3 0.2046 4.0 ------ UNKNOWN
220.2552 -2.4968 0.4 48.4 -164.2 1.9890 27.2 ------ UNKNOWN
199.2534 67.7489 3.0 40.1 -50.3 0.2421 3.8 ------ UNKNOWN
169.3358 77.9475 2.9 50.7 -39.2 0.4843 4.0 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
74.340610 671.240600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9786 -15.6468 0.3 27.7 102.6 26.0873 44.6 0.4 Sco X-1
254.5006 35.3162 2.5 49.5 19.8 5.0309 4.6 2.6 Her X-1
250.2507 -22.9690 2.5 35.6 110.4 4.0476 4.6 ------ UNKNOWN
243.5672 -5.0752 2.5 23.4 79.8 2.2583 4.7 ------ UNKNOWN
224.6453 -39.6817 2.9 37.4 157.1 2.7445 4.0 ------ UNKNOWN
236.9861 32.4791 2.9 38.4 5.7 2.1202 3.9 ------ UNKNOWN
173.1245 -43.9840 6.9 58.7 -159.3 6.0185 1.7 ------ UNKNOWN
192.1268 41.3406 4.3 50.7 -44.6 6.0552 2.7 ------ UNKNOWN
Plot creation:
Sat May 30 16:00:14 EDT 2015