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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
272.4591 -16.3220 0.0093 13.8605 -173.7126 1.9221961 20.799 TRIG_00555096
Foreground time interval of the image:
-31.064 21.669 (delta_t = 52.733 [sec])
Background time interval of the image:
-239.832 -31.064 (delta_t = 208.768 [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 1.408000
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 1.408000
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 1.408000
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 -31.064 sec. to 99.624 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.60955 ( -0.175058 0.176926 )
Norm@50keV : 9.78043E-04 ( -0.000102678 0.00010189 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.70 using 59 PHA bins.
# Reduced chi-squared = 1.258 for 57 degrees of freedom
# Null hypothesis probability = 9.093038e-02
Photon flux (15-150 keV) in 130.7 sec: 0.126058 ( -0.0128535 0.0128794 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.19412e-06 ( -1.33524e-07 1.35182e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -31.064 sec. to 99.624 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.960221 ( -0.820498 0.683628 )
Epeak [keV] : 76.1230 ( -21.0569 -76.123 )
Norm@50keV : 2.13723E-03 ( -0.00117695 0.00346662 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.09 using 59 PHA bins.
# Reduced chi-squared = 1.234 for 56 degrees of freedom
# Null hypothesis probability = 1.124194e-01
Photon flux (15-150 keV) in 130.7 sec: 0.122068 ( -0.01356 0.013543 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.12655e-06 ( -1.49151e-07 1.52379e-07 ) ergs/cm2
Band function
Time interval is from -31.064 sec. to 99.624 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.960087 ( -0.643399 0.725572 )
beta : -10.0000 ( 10 5.32907e-15 )
Epeak [keV] : 76.1055 ( -32.5367 -76.1055 )
Norm@50keV : 2.13741E-03 ( -0.00117814 0.00346165 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.09 using 59 PHA bins.
# Reduced chi-squared = 1.256 for 55 degrees of freedom
# Null hypothesis probability = 9.583141e-02
Photon flux (15-150 keV) in 130.7 sec: 0.122192 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.12857e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.8113 (-1.63166 1.89054)
R^2/D10^2 : 1.85717E-02 (-0.00686806 0.0107212)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 85.87 using 59 PHA bins.
# Reduced chi-squared = 1.507 for 57 degrees of freedom
# Null hypothesis probability = 8.015975e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.792e-08 1.829e-08
25- 50 3.593e-07 5.052e-08
50-150 4.481e-07 1.012e-07
15-150 9.053e-07 1.293e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 161.151 (-60.7925 -160.578)
Norm : 0.519006 (-0.0563633 0.0697521)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.59 using 59 PHA bins.
# Reduced chi-squared = 1.221 for 57 degrees of freedom
# Null hypothesis probability = 1.222942e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.731e-07 6.863e-08
25- 50 3.241e-07 1.595e-07
50-150 6.584e-07 3.537e-07
15-150 1.156e-06 6.188e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.71632 (-1.71095 2.65212)
R1^2/D10^2 : 0.248478 (-0.179858 0.757143)
kT2 [keV] : 20.0075 (-4.01571 8.89079)
R2^2/D10^2 : 4.04915E-03 (-0.00309343 0.00567323)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.22 using 59 PHA bins.
# Reduced chi-squared = 1.240 for 55 degrees of freedom
# Null hypothesis probability = 1.086396e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.719e-07 8.420e-08
25- 50 3.209e-07 1.209e-07
50-150 6.126e-07 3.023e-07
15-150 1.105e-06 4.347e-07
Peak spectrum fit
Power-law model
Time interval is from -0.020 sec. to 0.980 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.60286 ( -0.305578 0.310417 )
Norm@50keV : 6.67547E-03 ( -0.00126318 0.00124501 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.75 using 59 PHA bins.
# Reduced chi-squared = 0.7851 for 57 degrees of freedom
# Null hypothesis probability = 8.806378e-01
Photon flux (15-150 keV) in 1 sec: 0.858589 ( -0.155134 0.155466 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.24081e-08 ( -1.24675e-08 1.27385e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.020 sec. to 0.980 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.999543 ( -1.89352 0.871362 )
Epeak [keV] : 73.7944 ( -30.9409 -73.8509 )
Norm@50keV : 1.44422E-02 ( -0.00884584 0.164715 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.12 using 59 PHA bins.
# Reduced chi-squared = 0.7879 for 56 degrees of freedom
# Null hypothesis probability = 8.746635e-01
Photon flux (15-150 keV) in 1 sec: 0.839117 ( -0.161569 0.160913 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.84954e-08 ( -1.52095e-08 1.51017e-08 ) ergs/cm2
Band function
Time interval is from -0.020 sec. to 0.980 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.72089 ( -11.1274 -4.72089 )
beta : -1.99495 ( -0.612655 0.459135 )
Epeak [keV] : 31.1398 ( -12.0047 13.6049 )
Norm@50keV : 141.703 ( -24.7406 5080.12 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.71 using 59 PHA bins.
# Reduced chi-squared = 0.7584 for 55 degrees of freedom
# Null hypothesis probability = 9.068470e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.81598e-08 ( -5.81528e-08 -1.31263e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.7473 (-2.2334 3.03442)
R^2/D10^2 : 0.231278 (-0.13223 0.273452)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.48 using 59 PHA bins.
# Reduced chi-squared = 0.8505 for 57 degrees of freedom
# Null hypothesis probability = 7.818909e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.736e-09 2.243e-09
25- 50 2.067e-08 5.680e-09
50-150 1.691e-08 6.693e-09
15-150 4.431e-08 1.260e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 166.405 (-92.2825 -164.713)
Norm : 3.53116 (-0.656435 0.957487)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.20 using 59 PHA bins.
# Reduced chi-squared = 0.7754 for 57 degrees of freedom
# Null hypothesis probability = 8.923199e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.982e-09 5.100e-09
25- 50 1.689e-08 9.170e-09
50-150 3.474e-08 1.981e-08
15-150 6.062e-08 3.453e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.73383 (-2.58946 2.9164)
R1^2/D10^2 : 0.559709 (-0.305628 1.00599)
kT2 [keV] : 44.5947 (-35.3597 -54.6563)
R2^2/D10^2 : 1.49679E-03 (-0.00084865 0.0250681)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.02 using 59 PHA bins.
# Reduced chi-squared = 0.7459 for 55 degrees of freedom
# Null hypothesis probability = 9.193736e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.532e-09 5.005e-09
25- 50 1.907e-08 1.079e-08
50-150 3.281e-08 1.812e-08
15-150 6.041e-08 3.208e-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: 1.41384 ( -0.150953 0.149896 )
Norm@50keV : 1.86210E-03 ( -0.000162046 0.000161898 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 102.66 using 59 PHA bins.
# Reduced chi-squared = 1.8011 for 57 degrees of freedom
# Null hypothesis probability = 1.991501e-04
Photon flux (15-150 keV) in 52.73 sec: 0.227485 ( -0.0204609 0.0205237 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.46124e-07 ( -8.94923e-08 9.01952e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.685443 ( -0.705353 0.602293 )
Epeak [keV] : 91.3895 ( -23.4737 168.055 )
Norm@50keV : 4.27354E-03 ( -0.00208334 0.00502465 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 98.26 using 59 PHA bins.
# Reduced chi-squared = 1.755 for 56 degrees of freedom
# Null hypothesis probability = 4.157502e-04
Photon flux (15-150 keV) in 52.73 sec: 0.219099 ( -0.021608 0.021625 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.9274e-07 ( -9.9665e-08 1.00456e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.670173 ( -0.519247 0.715508 )
beta : -9.37166 ( 9.36958 19.3696 )
Epeak [keV] : 91.6327 ( -19.3333 146.754 )
Norm@50keV : 4.31762E-03 ( -0.00211562 0.00209788 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 98.27 using 59 PHA bins.
# Reduced chi-squared = 1.787 for 55 degrees of freedom
# Null hypothesis probability = 3.028756e-04
Photon flux (15-150 keV) in 52.73 sec: 0.220276 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 8.94095e-07 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 3.11e-07
S(50-100 keV) = 4.08e-07
T90 vs. Hardness ratio plot
T90 = 120.03200006485 sec.
Hardness ratio (energy fluence ratio) = 1.3119
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.09471
Count Ratio (50-100 keV) / (15-25 keV) = 0.846864
Mask shadow pattern
IMX = -2.452599905297882E-01, IMY = 2.702226795383771E-02
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.408000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.408000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.408000
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:
-239.832000 -31.064000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9818 -15.6425 0.3 23.8 100.8 14.2649 40.8 0.2 Sco X-1
256.1066 -37.8200 4.9 12.3 22.8 0.5633 2.3 5.9 4U 1700-377
256.3160 -36.3988 4.7 11.2 27.6 0.6420 2.4 5.9 GX 349+2
262.8637 -24.8564 6.8 5.2 123.3 0.3986 1.7 10.3 GX 1+4
264.6408 -44.5831 11.3 15.6 -14.1 0.2394 1.0 9.1 4U 1735-44
268.2905 -1.2740 0.0 27.8 165.3 0.6192 2.1 11.7 SW J1753.5-0127
270.4120 -25.1475 4.3 5.3 -155.1 0.7153 2.8 8.1 GX 5-1
270.3843 -25.6826 4.8 4.9 -151.1 0.7670 3.0 5.7 GRS 1758-258
273.9804 -14.0077 2.4 16.6 -172.1 1.0953 4.8 2.3 GX 17+2
276.1007 -30.3786 4.3 8.5 -97.1 0.6148 2.7 9.1 H1820-303
285.0268 -24.9096 220.0 17.1 -118.2 -0.0139 -0.1 0.8 HT1900.1-2455
288.7897 10.9351 1.7 45.4 -167.1 3.3158 6.7 0.8 GRS 1915+105
263.0329 -33.8885 4.3 5.7 10.9 0.6132 2.7 3.9 GX 354-0
296.8399 22.3012 3.4 59.1 -165.6 5.2967 3.4 ------ UNKNOWN
300.1702 20.8408 3.2 59.5 -161.7 7.4639 3.6 ------ UNKNOWN
310.6652 -4.6248 3.6 48.4 -130.3 3.4112 3.2 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-31.064000 21.668600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9166 -15.6336 172.3 23.9 100.7 0.0085 0.1 3.7 Sco X-1
255.9681 -38.0022 4.4 12.5 22.6 0.2451 2.6 9.5 4U 1700-377
256.2879 -36.3261 3.4 11.2 28.0 -0.3221 -3.4 9.2 GX 349+2
262.8851 -24.6186 5.1 5.4 124.9 -0.2146 -2.3 10.2 GX 1+4
264.7992 -44.4384 4.8 15.5 -14.4 0.2169 2.4 2.5 4U 1735-44
268.3833 -1.4109 74.2 27.7 165.5 0.0184 0.2 2.7 SW J1753.5-0127
270.4800 -25.0089 12.4 5.4 -155.6 -0.0840 -0.9 11.4 GX 5-1
270.4867 -25.7110 7.4 4.9 -150.1 0.1474 1.6 10.1 GRS 1758-258
273.9904 -14.0152 4.1 16.6 -172.0 -0.2617 -2.8 1.6 GX 17+2
275.8485 -30.4305 3.8 8.3 -96.6 0.2758 3.0 5.5 H1820-303
284.8729 -24.9049 5.5 16.9 -118.4 0.2183 2.1 8.9 HT1900.1-2455
288.8023 10.9391 4.9 45.4 -167.0 0.3884 2.3 0.5 GRS 1915+105
262.9710 -33.6689 13.7 5.5 12.6 -0.0765 -0.8 10.0 GX 354-0
278.2582 8.2434 2.4 39.0 -179.9 0.6843 4.8 ------ UNKNOWN
272.4591 -16.3220 0.6 13.9 -173.7 1.9222 20.8 ------ UNKNOWN
269.0499 -44.0677 2.4 15.2 -26.0 0.4218 4.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
68.468590 962.312600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9828 -15.6527 0.3 26.3 95.0 55.8380 41.8 0.8 Sco X-1
254.5029 35.2175 4.8 54.3 169.4 8.9587 2.4 7.8 Her X-1
256.1703 -37.9299 9.5 25.9 37.7 1.2991 1.2 10.1 4U 1700-377
256.6184 -36.5223 5.6 24.5 39.1 2.0580 2.0 10.6 GX 349+2
263.1617 -24.6184 6.9 11.9 52.1 1.4334 1.7 11.3 GX 1+4
264.7486 -44.4464 14.4 28.8 18.7 0.7697 0.8 0.3 4U 1735-44
268.4408 -1.5303 3.5 15.3 172.3 2.5950 3.3 6.4 SW J1753.5-0127
270.2770 -25.0830 2.4 9.0 19.7 3.5808 4.8 0.4 GX 5-1
270.2342 -25.8065 6.3 9.7 18.9 1.3942 1.8 5.3 GRS 1758-258
274.0167 -14.0834 3.0 2.8 -137.4 3.1548 3.9 2.9 GX 17+2
275.8424 -30.3491 7.9 14.4 -4.8 1.0706 1.5 4.4 H1820-303
285.0126 -24.8981 5.8 14.6 -44.7 1.7237 2.0 1.9 HT1900.1-2455
288.8020 10.9433 1.0 31.8 -140.8 11.9825 11.3 0.3 GRS 1915+105
263.0555 -33.8079 3.9 19.4 31.3 2.2959 3.0 3.7 GX 354-0
232.8420 -54.6469 3.2 48.9 36.6 12.0047 3.6 ------ UNKNOWN
251.8171 20.3052 2.7 41.8 157.8 7.5242 4.3 ------ UNKNOWN
270.0683 -10.4504 4.1 6.3 166.3 2.3502 2.8 ------ UNKNOWN
277.3487 -23.8842 2.6 8.9 -23.6 3.6783 4.5 ------ UNKNOWN
303.7942 -22.2281 4.3 30.2 -66.4 2.9712 2.7 ------ UNKNOWN
285.1539 42.0215 4.0 59.6 -161.6 21.6284 2.9 ------ UNKNOWN
287.4182 40.7217 4.7 58.8 -159.3 16.4906 2.5 ------ UNKNOWN
UNKNOWN
Plot creation:
Sat May 30 16:58:31 EDT 2015