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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
279.2047 17.5368 0.0066 40.4920 -170.6491 6.5049972 28.895 TRIG_00449399
Foreground time interval of the image:
-66.764 35.405 (delta_t = 102.169 [sec])
Background time interval of the image:
-239.296 -66.764 (delta_t = 172.532 [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 4.096000
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 4.096000
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 4.096000
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 -66.764 sec. to 38.840 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.76706 ( -0.080343 0.0809815 )
Norm@50keV : 4.18892E-03 ( -0.000181151 0.000180617 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.50 using 59 PHA bins.
# Reduced chi-squared = 0.8508 for 57 degrees of freedom
# Null hypothesis probability = 7.812731e-01
Photon flux (15-150 keV) in 105.6 sec: 0.570017 ( -0.026015 0.0261223 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.07801e-06 ( -1.80796e-07 1.81564e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -66.764 sec. to 38.840 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.65500 ( -0.326616 0.183155 )
Epeak [keV] : 155.583 ( -121.496 -155.627 )
Norm@50keV : 4.75905E-03 ( -0.000807806 0.00208478 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.12 using 59 PHA bins.
# Reduced chi-squared = 0.8593 for 56 degrees of freedom
# Null hypothesis probability = 7.639419e-01
Photon flux (15-150 keV) in 105.6 sec: 0.565348 ( -0.028746 0.028694 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.04282e-06 ( -2.07831e-07 2.03966e-07 ) ergs/cm2
Band function
Time interval is from -66.764 sec. to 38.840 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.36403 ( 1.32344 1.32344 )
beta : -1.84170 ( 1.84042 0.138598 )
Epeak [keV] : 62.2259 ( -59.5713 -59.5713 )
Norm@50keV : 7.12656E-03 ( -0.00277262 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.55 using 59 PHA bins.
# Reduced chi-squared = 0.8646 for 55 degrees of freedom
# Null hypothesis probability = 7.518871e-01
Photon flux (15-150 keV) in 105.6 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.02824e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.5134 ( )
R^2/D10^2 : 8.43312E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 183.37 using 59 PHA bins.
# Reduced chi-squared = 3.2169 for 57 degrees of freedom
# Null hypothesis probability = 3.460110e-15
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.444e-07 2.814e-08
25- 50 1.236e-06 6.970e-08
50-150 1.458e-06 1.220e-07
15-150 3.039e-06 1.373e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 125.813 ( )
Norm : 2.34911 (-0.129898 0.16978)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.49 using 59 PHA bins.
# Reduced chi-squared = 0.9034 for 57 degrees of freedom
# Null hypothesis probability = 6.809554e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.372e-07 4.736e-08
25- 50 1.154e-06 6.970e-08
50-150 2.130e-06 5.660e-07
15-150 3.920e-06 6.172e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.01976 (-1.03417 1.11438)
R1^2/D10^2 : 0.664416 (-0.260528 0.51415)
kT2 [keV] : 25.8047 (-4.10292 6.63993)
R2^2/D10^2 : 5.98055E-03 (-0.00334668 0.00565731)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.75 using 59 PHA bins.
# Reduced chi-squared = 1.014 for 55 degrees of freedom
# Null hypothesis probability = 4.463110e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.289e-07 9.684e-08
25- 50 1.181e-06 1.376e-07
50-150 2.162e-06 4.213e-07
15-150 3.972e-06 5.364e-07
Peak spectrum fit
Power-law model
Time interval is from 3.128 sec. to 4.128 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.65803 ( -0.241913 0.247375 )
Norm@50keV : 1.30166E-02 ( -0.0019233 0.00190256 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.98 using 59 PHA bins.
# Reduced chi-squared = 1.228 for 57 degrees of freedom
# Null hypothesis probability = 1.159081e-01
Photon flux (15-150 keV) in 1 sec: 1.70417 ( -0.24768 0.248434 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.20963e-07 ( -1.86652e-08 1.8862e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 3.128 sec. to 4.128 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.15265 ( -1.47313 0.720856 )
Epeak [keV] : 80.2540 ( -33.6925 -80.3556 )
Norm@50keV : 2.39910E-02 ( -0.0239457 0.117049 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.39 using 59 PHA bins.
# Reduced chi-squared = 1.239 for 56 degrees of freedom
# Null hypothesis probability = 1.078292e-01
Photon flux (15-150 keV) in 1 sec: 1.67029 ( -0.26208 0.25927 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.16475e-07 ( -2.17825e-08 2.1249e-08 ) ergs/cm2
Band function
Time interval is from 3.128 sec. to 4.128 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.520124 ( 0.796768 0.796768 )
beta : -2.09769 ( 2.08095 0.586532 )
Epeak [keV] : 56.2379 ( -56.2773 62.452 )
Norm@50keV : 5.51962E-02 ( -0.055609 985.078 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.43 using 59 PHA bins.
# Reduced chi-squared = 1.244 for 55 degrees of freedom
# Null hypothesis probability = 1.054099e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15656e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.0726 (-1.87131 2.27422)
R^2/D10^2 : 0.311749 (-0.140011 0.239049)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.87 using 59 PHA bins.
# Reduced chi-squared = 1.331 for 57 degrees of freedom
# Null hypothesis probability = 4.806056e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.130e-08 2.815e-09
25- 50 3.915e-08 8.000e-09
50-150 4.243e-08 1.287e-08
15-150 9.288e-08 1.855e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 154.598 (-71.5311 -152.583)
Norm : 6.98510 (-1.08453 1.53578)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.41 using 59 PHA bins.
# Reduced chi-squared = 1.218 for 57 degrees of freedom
# Null hypothesis probability = 1.252623e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.789e-08 9.840e-09
25- 50 3.331e-08 1.794e-08
50-150 6.657e-08 3.854e-08
15-150 1.178e-07 6.600e-08
Double BB
R1^2/D10^2 : 0.537062 (-0.283896 0.523638)
kT2 [keV] : 200.000 ( )
R2^2/D10^2 : 1.45948E-04 (-6.83082e-05 0.000534002)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.18 using 59 PHA bins.
#Fit statistic : Chi-Squared = 67.37 using 59 PHA bins.
#Fit statistic : Chi-Squared = 67.15 using 59 PHA bins.
# Reduced chi-squared = 1.294 for 55 degrees of freedom
# Reduced chi-squared = 1.225 for 55 degrees of freedom
# Reduced chi-squared = 1.221 for 55 degrees of freedom
# Null hypothesis probability = 7.003431e-02
# Null hypothesis probability = 1.223483e-01
# Null hypothesis probability = 1.261302e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.766e-08 8.929e-09
25- 50 3.451e-08 1.582e-08
50-150 5.042e-08 2.356e-08
15-150 1.026e-07 4.362e-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: 1.76598 ( -0.0805935 0.0812189 )
Norm@50keV : 4.26710E-03 ( -0.000184433 0.000183886 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.08 using 59 PHA bins.
# Reduced chi-squared = 0.8611 for 57 degrees of freedom
# Null hypothesis probability = 7.628397e-01
Photon flux (15-150 keV) in 102.2 sec: 0.580422 ( -0.0265086 0.0266192 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.02059e-06 ( -1.7821e-07 1.78967e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.71094 ( -0.321074 0.356583 )
Epeak [keV] : 264.393 ( )
Norm@50keV : 4.54350E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.99 using 59 PHA bins.
# Reduced chi-squared = 0.8749 for 56 degrees of freedom
# Null hypothesis probability = 7.350596e-01
Photon flux (15-150 keV) in 102.2 sec: 0.578056 ( -0.029252 0.02814 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.00454e-06 ( -2.04472e-07 1.92524e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.42544 ( 1.33629 1.33629 )
beta : -1.82376 ( -1.20018 0.120772 )
Epeak [keV] : 65.2075 ( -57.3482 103.703 )
Norm@50keV : 6.71793E-03 ( -0.00227637 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.43 using 59 PHA bins.
# Reduced chi-squared = 0.8805 for 55 degrees of freedom
# Null hypothesis probability = 7.220789e-01
Photon flux (15-150 keV) in 102.2 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) = 1.13e-06
S(50-100 keV) = 1.33e-06
T90 vs. Hardness ratio plot
T90 = 87.6759999394417 sec.
Hardness ratio (energy fluence ratio) = 1.17699
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.23368
Count Ratio (50-100 keV) / (15-25 keV) = 0.794076
Mask shadow pattern
IMX = -8.424927693442371E-01, IMY = 1.387327467616037E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000
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:
-239.296000 -66.764000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9813 -15.6396 0.4 26.0 98.2 7.2703 28.4 0.1 Sco X-1
255.9185 -37.8373 1.4 20.6 35.6 1.5295 8.0 3.3 4U 1700-377
256.3032 -36.4328 4.9 19.4 37.9 0.4407 2.3 6.4 GX 349+2
263.0921 -24.7381 2.0 8.2 69.0 0.9593 5.7 4.6 GX 1+4
264.5677 -44.2850 0.0 22.8 11.3 0.3553 2.0 12.4 4U 1735-44
268.4029 -1.4177 4.3 21.1 169.2 0.5183 2.7 3.0 SW J1753.5-0127
270.2820 -25.0678 2.6 3.1 21.5 0.8424 4.5 0.7 GX 5-1
270.2121 -25.7243 4.5 3.7 18.3 0.4879 2.6 5.0 GRS 1758-258
274.1583 -14.0741 6.2 8.5 -165.0 0.3360 1.9 9.2 GX 17+2
275.7520 -30.5174 0.0 9.0 -25.1 0.2403 1.4 12.7 H1820-303
285.2083 -25.0269 4.1 12.7 -76.7 0.5053 2.9 11.3 HT1900.1-2455
288.7978 10.9331 1.5 37.2 -153.2 1.8614 7.8 0.7 GRS 1915+105
262.9226 -33.7791 2.5 13.8 29.9 0.7627 4.6 4.7 GX 354-0
238.7225 -14.2669 2.8 32.2 96.8 1.3778 4.1 ------ UNKNOWN
303.7665 23.2510 2.9 55.2 -145.3 5.1629 4.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-66.764000 35.404600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.0054 -15.5518 2.5 26.0 98.5 1.0023 4.6 5.5 Sco X-1
256.0181 -37.8361 187.2 20.5 35.4 -0.0098 -0.1 1.6 4U 1700-377
256.4355 -36.4234 4.7 19.3 37.7 0.3839 2.5 0.0 GX 349+2
263.1589 -24.9078 0.0 8.2 67.7 -0.1132 -0.8 12.7 GX 1+4
264.7258 -44.3397 6.9 22.8 11.0 0.2513 1.7 6.7 4U 1735-44
268.5000 -1.6065 0.0 20.9 169.4 0.2843 1.8 12.2 SW J1753.5-0127
270.4251 -24.9344 8.3 2.9 20.2 0.1992 1.4 11.6 GX 5-1
270.4748 -25.6065 4.8 3.5 15.3 0.3582 2.5 12.4 GRS 1758-258
273.9717 -13.9578 3.7 8.6 -166.4 0.4312 3.1 5.1 GX 17+2
275.8936 -30.2176 11.8 8.8 -26.7 -0.1358 -1.0 9.1 H1820-303
284.9679 -25.0468 4.7 12.5 -76.4 -0.3596 -2.5 8.4 HT1900.1-2455
288.6538 11.1028 0.0 37.3 -153.5 0.4243 2.1 12.7 GRS 1915+105
263.0800 -33.6935 6.4 13.7 29.7 -0.2431 -1.8 9.6 GX 354-0
228.9457 -42.1475 2.7 40.6 48.7 1.7341 4.2 ------ UNKNOWN
279.2047 17.5367 0.4 40.5 -170.6 6.5046 28.9 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
93.804590 559.304600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9749 -15.6469 0.8 47.3 41.5 18.9665 13.6 0.5 Sco X-1
254.4593 35.3465 19.1 28.3 128.0 -0.2761 -0.6 0.3 Her X-1
262.9863 -24.7232 3.2 45.1 15.0 2.4604 3.6 1.8 GX 1+4
268.4278 -1.4826 2.3 21.8 24.3 1.5682 5.0 4.0 SW J1753.5-0127
270.2438 -25.1034 3.7 43.5 5.9 1.6705 3.1 2.6 GX 5-1
270.1980 -25.6868 4.2 44.1 5.7 1.5347 2.7 6.6 GRS 1758-258
273.9243 -14.0241 3.2 32.0 3.7 1.4073 3.6 4.8 GX 17+2
275.8884 -30.4985 5.4 48.1 -2.1 -1.5225 -2.2 8.1 H1820-303
284.9562 -24.9355 9.3 42.8 -13.6 0.6147 1.3 4.4 HT1900.1-2455
288.8081 10.9442 0.5 11.4 -62.0 7.4452 24.6 0.6 GRS 1915+105
299.6094 35.1995 2.2 25.3 -144.1 1.6935 5.2 0.9 Cyg X-1
308.0637 41.1269 14.0 34.2 -145.6 0.3553 0.8 10.7 Cyg X-3
326.3090 38.3049 7.2 45.9 -132.7 1.7817 1.6 6.5 Cyg X-2
263.0931 -33.9582 5.0 53.7 10.6 3.1858 2.3 9.0 GX 354-0
239.8359 17.0201 3.4 37.5 89.4 3.7733 3.4 ------ UNKNOWN
245.3513 18.2019 2.2 32.2 90.6 3.7251 5.3 ------ UNKNOWN
268.3370 23.7797 3.2 11.9 117.6 1.1412 3.6 ------ UNKNOWN
286.5694 71.5135 3.5 54.2 177.0 4.2523 3.3 ------ UNKNOWN
303.5440 39.8085 3.0 30.7 -147.5 1.2951 3.9 ------ UNKNOWN
335.6099 50.0656 5.6 55.3 -145.3 5.0587 2.1 ------ UNKNOWN
Plot creation:
Sat May 30 22:45:47 EDT 2015