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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
241.7561 -31.5686 0.0207 42.8525 -13.7543 0.1260840 9.279 TRIG_00345127
Foreground time interval of the image:
0.008 0.632 (delta_t = 0.624 [sec])
Background time interval of the image:
-707.483 -702.516 (delta_t = 4.968 [sec])
-239.584 0.008 (delta_t = 239.592 [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 0.384000
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 0.384000
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 0.384000
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 0.008 sec. to 0.632 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.915351 ( -0.331196 0.309617 )
Norm@50keV : 1.30437E-02 ( -0.00247986 0.00241399 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.63 using 59 PHA bins.
# Reduced chi-squared = 0.8181 for 57 degrees of freedom
# Null hypothesis probability = 8.348331e-01
Photon flux (15-150 keV) in 0.624 sec: 1.49743 ( -0.280808 0.284727 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.0807e-08 ( -1.6035e-08 1.60776e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.008 sec. to 0.632 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.548664 ( -1.54749 0.642614 )
Epeak [keV] : 255.783 ( -255.789 -255.789 )
Norm@50keV : 1.81248E-02 ( -0.00722607 0.0464369 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.37 using 59 PHA bins.
# Reduced chi-squared = 0.8280 for 56 degrees of freedom
# Null hypothesis probability = 8.170414e-01
Photon flux (15-150 keV) in 0.624 sec: 1.47000 ( -0.29172 0.29717 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.01855e-08 ( -1.64674e-08 1.63145e-08 ) ergs/cm2
Band function
Time interval is from 0.008 sec. to 0.632 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99999 ( -4.99999 -4.99999 )
beta : -0.998248 ( -0.374329 0.365113 )
Epeak [keV] : 34.1023 ( -34.1023 44.5005 )
Norm@50keV : 137.314 ( -23.415 2.79177e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.12 using 59 PHA bins.
# Reduced chi-squared = 0.8386 for 55 degrees of freedom
# Null hypothesis probability = 7.973167e-01
Photon flux (15-150 keV) in 0.624 sec: 1.49364 ( ) 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] : 26.4003 (-5.47453 8.04249)
R^2/D10^2 : 3.14321E-02 (-0.0172856 0.0333621)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.09 using 59 PHA bins.
# Reduced chi-squared = 0.8787 for 57 degrees of freedom
# Null hypothesis probability = 7.298924e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.305e-09 9.076e-10
25- 50 1.344e-08 4.840e-09
50-150 6.876e-08 2.267e-08
15-150 8.451e-08 2.991e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 6.41674 (-1.17735 1.17697)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.59 using 59 PHA bins.
# Reduced chi-squared = 1.028 for 57 degrees of freedom
# Null hypothesis probability = 4.168138e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.980e-09 5.778e-09
25- 50 1.920e-08 1.094e-08
50-150 4.211e-08 2.413e-08
15-150 7.129e-08 4.134e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.74716 (-4.40128 12.0444)
R1^2/D10^2 : 0.672191 (-0.624657 16.1514)
kT2 [keV] : 35.0925 (-10.7129 -35.1059)
R2^2/D10^2 : 1.19686E-02 (-0.0110619 0.0223621)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.80 using 59 PHA bins.
# Reduced chi-squared = 0.8327 for 55 degrees of freedom
# Null hypothesis probability = 8.069934e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.740e-09 3.491e-09
25- 50 1.585e-08 8.490e-09
50-150 7.020e-08 4.022e-08
15-150 9.179e-08 4.842e-08
Peak spectrum fit
Power-law model
Time interval is from -0.180 sec. to 0.820 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00761 ( -0.412821 0.383289 )
Norm@50keV : 7.86898E-03 ( -0.00184621 0.00180482 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.12 using 59 PHA bins.
# Reduced chi-squared = 1.090 for 57 degrees of freedom
# Null hypothesis probability = 2.987764e-01
Photon flux (15-150 keV) in 1 sec: 0.905973 ( -0.214278 0.219061 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.49438e-08 ( -1.91601e-08 1.90952e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.180 sec. to 0.820 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.255855 ( -2.3652 -0.255841 )
Epeak [keV] : 145.626 ( -145.624 -145.624 )
Norm@50keV : 1.57213E-02 ( -0.00934315 0.0916147 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.47 using 59 PHA bins.
# Reduced chi-squared = 1.098 for 56 degrees of freedom
# Null hypothesis probability = 2.865506e-01
Photon flux (15-150 keV) in 1 sec: 0.870661 ( -0.224801 0.230339 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.30748e-08 ( -1.99919e-08 1.97592e-08 ) ergs/cm2
Band function
Time interval is from -0.180 sec. to 0.820 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.333816 ( -0.899194 2.58209 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 152.440 ( -63.4999 253.454 )
Norm@50keV : 1.48585E-02 ( -0.00848448 0.0926246 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.48 using 59 PHA bins.
# Reduced chi-squared = 1.118 for 55 degrees of freedom
# Null hypothesis probability = 2.553337e-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] : 24.1324 (-5.72063 8.81824)
R^2/D10^2 : 2.45357E-02 (-0.0152195 0.0339122)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.95 using 59 PHA bins.
# Reduced chi-squared = 1.104 for 57 degrees of freedom
# Null hypothesis probability = 2.738317e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.528e-09 1.292e-09
25- 50 1.408e-08 7.171e-09
50-150 6.107e-08 2.739e-08
15-150 7.768e-08 3.404e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 3.90747 (-0.896132 0.895885)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.65 using 59 PHA bins.
# Reduced chi-squared = 1.187 for 57 degrees of freedom
# Null hypothesis probability = 1.579953e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.739e-09 5.775e-09
25- 50 1.873e-08 1.104e-08
50-150 4.109e-08 2.437e-08
15-150 6.956e-08 4.135e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.29324 (-6.3587 -6.3587)
R1^2/D10^2 : 0.770723 (-0.754724 -0.754724)
kT2 [keV] : 28.7967 (-8.42629 -28.851)
R2^2/D10^2 : 1.30062E-02 (-0.012914 0.0286552)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.89 using 59 PHA bins.
# Reduced chi-squared = 1.107 for 55 degrees of freedom
# Null hypothesis probability = 2.723954e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.060e-09 3.811e-09
25- 50 1.527e-08 7.820e-09
50-150 6.288e-08 3.774e-08
15-150 8.421e-08 4.577e-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: 0.915351 ( -0.331196 0.309617 )
Norm@50keV : 1.30437E-02 ( -0.00247986 0.00241399 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.63 using 59 PHA bins.
# Reduced chi-squared = 0.8181 for 57 degrees of freedom
# Null hypothesis probability = 8.348331e-01
Photon flux (15-150 keV) in 0.624 sec: 1.49743 ( -0.280808 0.284727 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.0807e-08 ( -1.6035e-08 1.60776e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.548664 ( -1.54749 0.642614 )
Epeak [keV] : 255.783 ( -255.789 -255.789 )
Norm@50keV : 1.81248E-02 ( -0.00722607 0.0464369 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.37 using 59 PHA bins.
# Reduced chi-squared = 0.8280 for 56 degrees of freedom
# Null hypothesis probability = 8.170414e-01
Photon flux (15-150 keV) in 0.624 sec: 1.47000 ( -0.29172 0.29717 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.01855e-08 ( -1.64674e-08 1.63145e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99999 ( -4.99999 -4.99999 )
beta : -0.998248 ( -0.374329 0.365113 )
Epeak [keV] : 34.1023 ( -34.1023 41.2188 )
Norm@50keV : 137.314 ( -23.415 2.79177e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.12 using 59 PHA bins.
# Reduced chi-squared = 0.8386 for 55 degrees of freedom
# Null hypothesis probability = 7.973167e-01
Photon flux (15-150 keV) in 0.624 sec: 1.49364 ( ) 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) = 1.59e-08
S(50-100 keV) = 3.37e-08
T90 vs. Hardness ratio plot
T90 = 0.540000021457672 sec.
Hardness ratio (energy fluence ratio) = 2.1195
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.96968
Count Ratio (50-100 keV) / (15-25 keV) = 2.52636
Mask shadow pattern
IMX = 9.011113519456880E-01, IMY = 2.205721656682202E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.384000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.384000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.384000
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:
-707.483400 -702.515600
-239.584000 0.008000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9754 -15.6399 0.2 27.5 -22.9 15.3557 70.4 0.2 Sco X-1
254.2558 35.2406 0.0 27.8 -162.6 0.2667 1.2 11.6 Her X-1
256.0367 -37.7610 4.6 51.5 -27.5 1.4290 2.5 5.5 4U 1700-377
256.3582 -36.5097 12.6 50.5 -28.4 0.4716 0.9 6.4 GX 349+2
262.9681 -24.8370 4.7 43.0 -43.0 0.9537 2.4 5.9 GX 1+4
268.3754 -1.3234 5.6 31.8 -78.9 0.6923 2.1 7.8 SW J1753.5-0127
270.2664 -25.0326 6.6 47.4 -50.0 -1.5161 -1.7 3.0 GX 5-1
270.1187 -25.8834 4.3 47.9 -49.1 2.4180 2.7 13.0 GRS 1758-258
273.8201 -14.1488 0.0 42.9 -64.8 -0.5277 -0.5 12.7 GX 17+2
262.8447 -33.8243 6.7 50.4 -36.1 1.1463 1.7 7.2 GX 354-0
200.4329 -15.1850 3.6 46.4 45.9 4.1539 3.3 ------ UNKNOWN
224.4864 0.8882 2.1 17.7 45.1 1.1106 5.3 ------ UNKNOWN
257.8279 28.9916 2.9 25.1 -148.2 0.8406 4.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.008000 0.632000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.8760 -15.4779 7.4 27.3 -22.8 -0.0142 -1.6 11.4 Sco X-1
254.2676 35.2781 9.5 27.8 -162.7 0.0111 1.2 10.1 Her X-1
256.0733 -37.9798 0.0 51.7 -27.4 -0.0431 -1.8 9.1 4U 1700-377
256.5686 -36.4506 3.9 50.5 -28.6 0.0629 2.9 6.6 GX 349+2
263.1587 -24.7441 8.5 43.0 -43.3 0.0232 1.4 8.2 GX 1+4
268.4709 -1.3601 4.1 31.9 -78.9 0.0399 2.8 8.3 SW J1753.5-0127
270.4823 -24.9393 0.0 47.5 -50.3 -0.0298 -0.8 13.7 GX 5-1
270.4463 -25.7684 9.2 48.0 -49.5 0.0473 1.2 7.9 GRS 1758-258
274.1822 -13.9569 4.5 43.1 -65.3 0.0850 2.5 11.3 GX 17+2
262.9441 -33.7383 5.1 50.4 -36.3 0.0625 2.3 6.2 GX 354-0
208.9484 -33.5186 2.1 53.0 21.2 0.2769 5.6 ------ UNKNOWN
222.6614 -2.0968 2.4 20.9 41.3 0.0441 4.7 ------ UNKNOWN
241.7561 -31.5686 1.2 42.9 -13.8 0.1261 9.3 ------ UNKNOWN
274.5146 -1.7631 2.4 37.7 -82.3 0.1048 4.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
76.916600 198.116600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
186.6529 -62.7647 115.0 46.5 18.7 -0.0373 -0.1 0.3 GX 301-2
244.9752 -15.6446 0.2 16.2 178.7 8.1255 63.2 0.4 Sco X-1
255.8330 -37.9741 81.9 13.2 -69.7 -0.0199 -0.1 10.7 4U 1700-377
256.3093 -36.2693 10.2 12.9 -77.3 0.1645 1.1 11.1 GX 349+2
262.9573 -24.7431 3.8 19.9 -117.3 0.4258 3.0 2.8 GX 1+4
264.8951 -44.3008 9.7 22.1 -60.8 -0.1907 -1.2 11.1 4U 1735-44
268.4969 -1.4928 4.2 39.3 -147.2 0.5544 2.8 8.1 SW J1753.5-0127
270.1241 -25.1461 6.6 25.7 -109.8 0.2801 1.7 9.6 GX 5-1
270.3021 -25.8343 5.0 25.6 -108.2 0.3816 2.3 5.5 GRS 1758-258
273.9909 -14.0359 4.1 34.3 -125.8 0.5756 2.8 0.9 GX 17+2
275.8535 -30.4989 9.2 29.1 -95.6 0.2326 1.3 8.7 H1820-303
285.0077 -25.0427 16.2 38.4 -101.1 0.3153 0.7 7.5 HT1900.1-2455
262.8899 -33.9650 10.8 17.9 -89.2 0.1604 1.1 9.3 GX 354-0
208.0275 -19.6885 3.2 32.5 90.7 1.0729 3.6 ------ UNKNOWN
240.1327 -4.8612 2.8 26.8 163.9 0.6320 4.1 ------ UNKNOWN
255.2242 -41.6543 1.9 14.7 -55.6 0.8417 6.3 ------ UNKNOWN
259.2468 4.2094 2.0 39.5 -164.4 1.0292 5.7 ------ UNKNOWN
255.8936 -46.0603 2.1 18.1 -45.5 0.7573 5.5 ------ UNKNOWN
276.6661 -77.8823 2.6 48.8 -21.7 1.1703 4.5 ------ UNKNOWN
279.2583 11.2376 2.3 55.9 -146.3 4.3295 4.9 ------ UNKNOWN
289.7418 -29.5864 2.2 41.0 -92.3 2.9395 5.1 ------ UNKNOWN
Plot creation:
Sun May 31 04:48:27 EDT 2015