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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
30.6491 33.4730 0.0058 25.1962 152.4356 1.6941248 33.359 TRIG_00590206
Foreground time interval of the image:
-3.820 13.492 (delta_t = 17.312 [sec])
Background time interval of the image:
-119.816 -3.820 (delta_t = 115.996 [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 -3.820 sec. to 13.492 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.29945 ( -0.0811009 0.0806595 )
Norm@50keV : 6.59113E-03 ( -0.000304275 0.000304275 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.75 using 59 PHA bins.
# Reduced chi-squared = 1.066 for 57 degrees of freedom
# Null hypothesis probability = 3.422755e-01
Photon flux (15-150 keV) in 17.31 sec: 0.786260 ( -0.0380404 0.0381027 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.12759e-06 ( -5.66246e-08 5.68002e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -3.820 sec. to 13.492 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.846811 ( -0.344958 0.319226 )
Epeak [keV] : 136.898 ( -37.3651 180.945 )
Norm@50keV : 1.07936E-02 ( -0.00309843 0.0047431 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.70 using 59 PHA bins.
# Reduced chi-squared = 0.9767 for 56 degrees of freedom
# Null hypothesis probability = 5.243072e-01
Photon flux (15-150 keV) in 17.31 sec: 0.768997 ( -0.039854 0.039878 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.0962e-06 ( -6.17413e-08 6.14263e-08 ) ergs/cm2
Band function
Time interval is from -3.820 sec. to 13.492 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.846685 ( -0.261801 0.207975 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 136.859 ( -22.9185 180.875 )
Norm@50keV : 1.07943E-02 ( -0.00309988 0.00474299 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.70 using 59 PHA bins.
# Reduced chi-squared = 0.9945 for 55 degrees of freedom
# Null hypothesis probability = 4.861774e-01
Photon flux (15-150 keV) in 17.31 sec: 0.772786 ( ) 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] : 17.8386 ( )
R^2/D10^2 : 5.13051E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 131.27 using 59 PHA bins.
# Reduced chi-squared = 2.3030 for 57 degrees of freedom
# Null hypothesis probability = 8.620008e-08
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.674e-08 5.617e-09
25- 50 2.607e-07 1.662e-08
50-150 6.006e-07 4.959e-08
15-150 9.181e-07 5.453e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 3.29173 (-0.153421 0.153387)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 83.88 using 59 PHA bins.
# Reduced chi-squared = 1.472 for 57 degrees of freedom
# Null hypothesis probability = 1.176797e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.419e-07 7.357e-09
25- 50 2.730e-07 1.437e-08
50-150 5.988e-07 3.159e-08
15-150 1.014e-06 5.357e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.30649 (-1.43661 1.60482)
R1^2/D10^2 : 0.389333 (-0.156929 0.313081)
kT2 [keV] : 29.8764 (-4.63095 7.81836)
R2^2/D10^2 : 7.24197E-03 (-0.00395925 0.00605902)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.81 using 59 PHA bins.
# Reduced chi-squared = 0.9603 for 55 degrees of freedom
# Null hypothesis probability = 5.586101e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.039e-07 2.079e-08
25- 50 2.692e-07 4.137e-08
50-150 7.303e-07 1.689e-07
15-150 1.103e-06 2.042e-07
Peak spectrum fit
Power-law model
Time interval is from 10.224 sec. to 11.224 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.24562 ( -0.159683 0.158425 )
Norm@50keV : 1.40582E-02 ( -0.00135001 0.00134911 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.05 using 59 PHA bins.
# Reduced chi-squared = 0.8605 for 57 degrees of freedom
# Null hypothesis probability = 7.640455e-01
Photon flux (15-150 keV) in 1 sec: 1.66153 ( -0.162471 0.162638 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.40857e-07 ( -1.50153e-08 1.51141e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 10.224 sec. to 11.224 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.791383 ( -0.668277 0.523309 )
Epeak [keV] : 139.661 ( -55.5801 -139.661 )
Norm@50keV : 2.34854E-02 ( -0.0101382 0.025281 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.27 using 59 PHA bins.
# Reduced chi-squared = 0.8442 for 56 degrees of freedom
# Null hypothesis probability = 7.903997e-01
Photon flux (15-150 keV) in 1 sec: 1.63828 ( -0.16542 0.16538 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.37209e-07 ( -1.6154e-08 1.6005e-08 ) ergs/cm2
Band function
Time interval is from 10.224 sec. to 11.224 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.94439 ( -14.2123 -4.94439 )
beta : -1.44273 ( -0.255386 0.204893 )
Epeak [keV] : 30.9181 ( -6.81503 4.97214 )
Norm@50keV : 326.542 ( -31.0172 1202.34 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.87 using 59 PHA bins.
# Reduced chi-squared = 0.7977 for 55 degrees of freedom
# Null hypothesis probability = 8.594345e-01
Photon flux (15-150 keV) in 1 sec: 1.63225 ( 5.36775 -0.16282 ) 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] : 17.6828 (-2.22992 2.62515)
R^2/D10^2 : 0.114788 (-0.0424506 0.0657531)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.42 using 59 PHA bins.
# Reduced chi-squared = 1.200 for 57 degrees of freedom
# Null hypothesis probability = 1.430084e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.227e-09 1.336e-09
25- 50 3.297e-08 5.030e-09
50-150 7.449e-08 1.412e-08
15-150 1.147e-07 1.579e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 6.85832 (-0.666706 0.666675)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.32 using 59 PHA bins.
# Reduced chi-squared = 1.006 for 57 degrees of freedom
# Null hypothesis probability = 4.631918e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.707e-08 7.586e-09
25- 50 3.285e-08 1.716e-08
50-150 7.204e-08 3.873e-08
15-150 1.220e-07 6.548e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.11326 (-2.00203 2.60123)
R1^2/D10^2 : 0.926169 (-0.521874 1.35437)
kT2 [keV] : 31.2584 (-7.61524 18.4378)
R2^2/D10^2 : 1.39087E-02 (-0.0106064 0.015981)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.25 using 59 PHA bins.
# Reduced chi-squared = 0.8046 for 55 degrees of freedom
# Null hypothesis probability = 8.497526e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.321e-08 6.442e-09
25- 50 3.297e-08 1.383e-08
50-150 9.366e-08 4.688e-08
15-150 1.398e-07 5.620e-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: 1.29945 ( -0.0811009 0.0806595 )
Norm@50keV : 6.59113E-03 ( -0.000304275 0.000304275 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.75 using 59 PHA bins.
# Reduced chi-squared = 1.066 for 57 degrees of freedom
# Null hypothesis probability = 3.422755e-01
Photon flux (15-150 keV) in 17.31 sec: 0.786260 ( -0.0380404 0.0381027 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.12759e-06 ( -5.66246e-08 5.68002e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.846811 ( -0.344958 0.319226 )
Epeak [keV] : 136.898 ( -37.3651 180.945 )
Norm@50keV : 1.07936E-02 ( -0.00309843 0.0047431 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.70 using 59 PHA bins.
# Reduced chi-squared = 0.9767 for 56 degrees of freedom
# Null hypothesis probability = 5.243072e-01
Photon flux (15-150 keV) in 17.31 sec: 0.768997 ( -0.039854 0.039878 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.0962e-06 ( -6.17413e-08 6.14263e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.846685 ( -0.261801 0.207975 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 136.859 ( -22.9185 180.875 )
Norm@50keV : 1.07943E-02 ( -0.00309988 0.00474299 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.70 using 59 PHA bins.
# Reduced chi-squared = 0.9945 for 55 degrees of freedom
# Null hypothesis probability = 4.861774e-01
Photon flux (15-150 keV) in 17.31 sec: 0.772786 ( ) 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) = 2.51e-07
S(50-100 keV) = 4.08e-07
T90 vs. Hardness ratio plot
T90 = 14.7839999198914 sec.
Hardness ratio (energy fluence ratio) = 1.6255
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.51429
Count Ratio (50-100 keV) / (15-25 keV) = 1.39195
Mask shadow pattern
IMX = -4.170783172532118E-01, IMY = -2.177135988342982E-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:
-119.816000 -3.820000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
299.5864 35.2025 1.3 47.3 -17.1 1.8870 9.0 0.2 Cyg X-1
308.1225 40.9790 1.6 39.1 -12.5 1.1014 7.2 1.7 Cyg X-3
326.3378 38.1911 10.6 26.1 -24.1 -0.1163 -1.1 11.1 Cyg X-2
55.2040 23.2542 2.7 49.0 150.4 1.8952 4.3 ------ UNKNOWN
318.5668 46.3530 2.8 30.7 -5.4 0.4913 4.1 ------ UNKNOWN
41.6895 -2.8697 3.2 57.1 -174.1 1.9427 3.6 ------ UNKNOWN
37.3055 -8.3893 2.6 59.1 -166.2 3.3871 4.4 ------ UNKNOWN
32.0074 -11.1343 2.8 58.8 -159.3 3.3998 4.1 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-3.820000 13.492000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
299.5114 35.0953 15.9 47.4 -17.2 0.0648 0.7 7.5 Cyg X-1
308.2926 41.0696 9.2 38.9 -12.5 -0.0778 -1.3 10.8 Cyg X-3
326.0115 38.4900 0.0 26.3 -23.3 0.0406 0.8 12.6 Cyg X-2
30.6498 33.4736 0.3 25.2 152.4 1.7066 33.6 ------ UNKNOWN
323.1658 29.1119 1.9 31.9 -39.5 0.3153 5.9 ------ UNKNOWN
333.3550 10.2330 2.1 37.7 -75.6 0.5732 5.6 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
61.684590 302.271600
420.184000 962.258400
978.184000 1468.239900
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
326.1274 38.4296 2700.0 51.4 -30.7 -0.0048 -0.0 6.8 Cyg X-2
73.4175 2.6121 3.4 50.5 152.5 9.4296 3.4 ------ UNKNOWN
310.6781 58.6469 3.9 56.8 -3.6 9.5237 3.0 ------ UNKNOWN
49.4268 -22.7812 3.8 59.1 -166.1 13.2254 3.0 ------ UNKNOWN
17.8493 -12.8961 2.3 48.0 -129.0 14.9175 4.9 ------ UNKNOWN
Plot creation:
Sat May 30 14:09:03 EDT 2015