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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
301.8580 10.9546 0.0053 31.7436 57.9141 11.4289109 36.546 TRIG_00292934
Foreground time interval of the image:
-7.568 124.421 (delta_t = 131.989 [sec])
Background time interval of the image:
-239.280 -7.568 (delta_t = 231.712 [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 -7.568 sec. to 167.596 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.33513 ( -0.0619154 0.0617006 )
Norm@50keV : 4.86468E-03 ( -0.00015442 0.000154401 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.14 using 59 PHA bins.
# Reduced chi-squared = 0.9323 for 57 degrees of freedom
# Null hypothesis probability = 6.205363e-01
Photon flux (15-150 keV) in 175.2 sec: 0.584292 ( -0.0201601 0.0202434 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.35233e-06 ( -2.85301e-07 2.86259e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -7.568 sec. to 167.596 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.33151 ( -0.0623894 0.0620381 )
Epeak [keV] : 9998.65 ( -9998.67 -9998.67 )
Norm@50keV : 4.88314E-03 ( -0.000154863 0.000567069 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.17 using 59 PHA bins.
# Reduced chi-squared = 0.9494 for 56 degrees of freedom
# Null hypothesis probability = 5.828379e-01
Photon flux (15-150 keV) in 175.2 sec: 0.584337 ( -0.020512 0.01989 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.32263e-06 ( -2.84858e-07 3.3924e-07 ) ergs/cm2
Band function
Time interval is from -7.568 sec. to 167.596 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.189332 ( 0.803105 0.803105 )
beta : -1.35988 ( -0.0837843 0.0702178 )
Epeak [keV] : 43.7625 ( -43.7859 104.839 )
Norm@50keV : 3.07710E-02 ( -0.0310778 440.923 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.04 using 59 PHA bins.
# Reduced chi-squared = 0.9462 for 55 degrees of freedom
# Null hypothesis probability = 5.883190e-01
Photon flux (15-150 keV) in 175.2 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] : 18.5714 ( )
R^2/D10^2 : 3.16631E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 284.69 using 59 PHA bins.
# Reduced chi-squared = 4.9945 for 57 degrees of freedom
# Null hypothesis probability = 5.389342e-32
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.791e-07 2.567e-08
25- 50 1.794e-06 8.269e-08
50-150 4.525e-06 2.742e-07
15-150 6.699e-06 2.514e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 2.45011 (-0.0784253 0.0783896)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 100.09 using 59 PHA bins.
# Reduced chi-squared = 1.7559 for 57 degrees of freedom
# Null hypothesis probability = 3.686367e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.069e-06 3.784e-08
25- 50 2.057e-06 7.621e-08
50-150 4.511e-06 1.507e-07
15-150 7.637e-06 2.628e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.62239 (-0.774338 0.850612)
R1^2/D10^2 : 0.429729 (-0.129537 0.197051)
kT2 [keV] : 33.0863 (-3.65285 5.02337)
R2^2/D10^2 : 3.99652E-03 (-0.00142498 0.00186551)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.79 using 59 PHA bins.
# Reduced chi-squared = 0.8871 for 55 degrees of freedom
# Null hypothesis probability = 7.094373e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.740e-07 9.837e-08
25- 50 1.945e-06 1.380e-07
50-150 5.613e-06 5.457e-07
15-150 8.432e-06 7.288e-07
Peak spectrum fit
Power-law model
Time interval is from 0.372 sec. to 1.372 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.841377 ( -0.107581 0.106099 )
Norm@50keV : 5.52901E-02 ( -0.00322008 0.00320711 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.51 using 59 PHA bins.
# Reduced chi-squared = 0.7458 for 57 degrees of freedom
# Null hypothesis probability = 9.234892e-01
Photon flux (15-150 keV) in 1 sec: 6.34768 ( -0.365794 0.366457 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.35142e-07 ( -4.01897e-08 4.03334e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.372 sec. to 1.372 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.833534 ( -0.197384 0.107635 )
Epeak [keV] : 9994.70 ( -9996.58 -9996.58 )
Norm@50keV : 5.56652E-02 ( -0.00318052 0.0197409 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.53 using 59 PHA bins.
# Reduced chi-squared = 0.7595 for 56 degrees of freedom
# Null hypothesis probability = 9.077863e-01
Photon flux (15-150 keV) in 1 sec: 6.34575 ( -0.36592 0.36612 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.35518e-07 ( -4.0269e-08 3.9919e-08 ) ergs/cm2
Band function
Time interval is from 0.372 sec. to 1.372 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.818954 ( 0.818954 0.818954 )
beta : -0.841386 ( -0.106028 0.107788 )
Epeak [keV] : 18.9911 ( -18.9911 -18.9911 )
Norm@50keV : 7.50436E-02 ( -0.0229259 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.51 using 59 PHA bins.
# Reduced chi-squared = 0.7729 for 55 degrees of freedom
# Null hypothesis probability = 8.907059e-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] : 25.8685 (-2.1768 2.48539)
R^2/D10^2 : 0.143326 (-0.0335162 0.0423557)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 94.92 using 59 PHA bins.
# Reduced chi-squared = 1.665 for 57 degrees of freedom
# Null hypothesis probability = 1.204784e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.636e-08 1.880e-09
25- 50 9.440e-08 9.030e-09
50-150 4.658e-07 4.185e-08
15-150 5.765e-07 4.570e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 24.7782 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 161.04 using 59 PHA bins.
# Reduced chi-squared = 2.8253 for 57 degrees of freedom
# Null hypothesis probability = 7.274630e-12
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.170e-08 4.065e-09
25- 50 1.187e-07 9.850e-09
50-150 2.603e-07 7.370e-08
15-150 4.407e-07 7.515e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.75204 (-2.00061 2.661)
R1^2/D10^2 : 4.50451 (-2.94438 12.7949)
kT2 [keV] : 36.3943 (-5.72916 10.2939)
R2^2/D10^2 : 4.88363E-02 (-0.024746 0.0324291)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.92 using 59 PHA bins.
# Reduced chi-squared = 0.7804 for 55 degrees of freedom
# Null hypothesis probability = 8.818034e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.065e-08 1.729e-08
25- 50 9.956e-08 2.505e-08
50-150 5.058e-07 8.130e-08
15-150 6.460e-07 1.037e-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: 1.26002 ( -0.0629472 0.0626065 )
Norm@50keV : 5.76054E-03 ( -0.000187752 0.000187631 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.84 using 59 PHA bins.
# Reduced chi-squared = 0.9096 for 57 degrees of freedom
# Null hypothesis probability = 6.683060e-01
Photon flux (15-150 keV) in 132 sec: 0.682442 ( -0.0240124 0.0241092 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.59004e-06 ( -2.64434e-07 2.65283e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.25585 ( -0.208845 0.0675428 )
Epeak [keV] : 1.00000E+04 ( )
Norm@50keV : 5.78579E-03 ( -0.000187613 0.000187478 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.87 using 59 PHA bins.
# Reduced chi-squared = 0.9262 for 56 degrees of freedom
# Null hypothesis probability = 6.319265e-01
Photon flux (15-150 keV) in 132 sec: 0.682417 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.58773e-06 ( -2.55222e-07 2.68488e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -5.70193E-03 ( -2.5722 -2.5722 )
beta : -1.28347 ( -0.0667731 0.0663616 )
Epeak [keV] : 43.1205 ( -43.1097 107.704 )
Norm@50keV : 4.44454E-02 ( -0.0447656 236.264 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.72 using 59 PHA bins.
# Reduced chi-squared = 0.9223 for 55 degrees of freedom
# Null hypothesis probability = 6.386066e-01
Photon flux (15-150 keV) in 132 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) = 1.90e-06
S(50-100 keV) = 3.01e-06
T90 vs. Hardness ratio plot
T90 = 148.387999981642 sec.
Hardness ratio (energy fluence ratio) = 1.58421
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.59863
Count Ratio (50-100 keV) / (15-25 keV) = 1.37973
Mask shadow pattern
IMX = 3.286278128282195E-01, IMY = -5.241649970967113E-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:
-239.280000 -7.568000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9885 -15.6428 0.6 32.9 -92.6 6.8446 20.5 0.5 Sco X-1
254.4898 35.3393 6.2 51.2 -15.2 0.8476 1.9 1.6 Her X-1
255.8180 -37.8883 22.1 34.0 -137.3 0.1310 0.5 8.4 4U 1700-377
256.6218 -36.5322 3.8 32.6 -136.5 0.6937 3.0 11.1 GX 349+2
262.9904 -24.6447 3.2 20.3 -126.1 0.6867 3.7 6.1 GX 1+4
264.7656 -44.3055 11.3 35.7 -153.4 0.2221 1.0 8.7 4U 1735-44
268.4158 -1.3509 2.1 13.5 -37.8 0.9932 5.6 6.7 SW J1753.5-0127
270.2580 -25.1451 2.6 16.5 -143.4 0.7844 4.5 4.2 GX 5-1
270.4776 -25.8119 5.1 17.0 -145.1 0.4039 2.3 10.3 GRS 1758-258
273.9420 -14.0574 2.3 5.6 -119.5 0.8537 5.0 3.9 GX 17+2
275.8839 -30.4335 4.6 20.0 -163.8 0.4372 2.5 4.5 H1820-303
284.8814 -24.9534 6.7 15.7 167.5 0.2817 1.7 8.6 HT1900.1-2455
288.8041 10.9495 1.1 23.9 35.9 2.0128 10.1 0.4 GRS 1915+105
263.0334 -33.8380 2.8 27.2 -141.4 0.8468 4.1 2.2 GX 354-0
283.5865 -24.5195 3.0 14.8 171.0 0.6251 3.9 ------ UNKNOWN
282.4781 -42.4426 2.4 32.1 -175.8 1.0323 4.9 ------ UNKNOWN
267.8185 30.5885 2.7 42.4 -3.7 1.3208 4.3 ------ UNKNOWN
270.4332 -20.4853 2.7 12.5 -133.5 0.7611 4.3 ------ UNKNOWN
252.5306 41.7940 2.7 57.5 -12.8 3.9691 4.3 ------ UNKNOWN
258.5012 -66.1998 2.3 57.3 -160.7 4.6951 4.9 ------ UNKNOWN
236.6418 5.9591 2.8 44.7 -60.3 3.0598 4.1 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-7.568000 124.420590
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.1355 -15.7623 56.0 32.7 -92.9 -0.0566 -0.2 11.6 Sco X-1
254.3572 35.4682 8.6 51.3 -15.2 -0.5513 -1.3 9.0 Her X-1
255.9461 -37.9695 14.9 34.0 -137.6 -0.1619 -0.8 7.8 4U 1700-377
256.3831 -36.4775 18.1 32.7 -136.2 0.1311 0.6 4.1 GX 349+2
263.0091 -24.7458 37.6 20.4 -126.3 0.0527 0.3 0.0 GX 1+4
264.5663 -44.4712 20.5 35.9 -153.2 -0.1172 -0.6 7.7 4U 1735-44
268.3300 -1.5239 10.0 13.5 -38.6 0.1931 1.1 4.8 SW J1753.5-0127
270.2859 -25.2277 8.5 16.6 -143.6 0.2280 1.4 8.9 GX 5-1
270.2189 -25.8998 5.3 17.2 -144.5 0.3719 2.2 10.4 GRS 1758-258
273.9413 -13.8949 4.0 5.5 -118.1 0.4422 2.9 9.3 GX 17+2
275.8502 -30.4935 3.8 20.1 -163.8 -0.5033 -3.1 8.5 H1820-303
285.0460 -24.7996 7.3 15.6 166.8 0.2617 1.6 7.3 HT1900.1-2455
288.7504 10.9245 5.1 23.8 35.8 0.4282 2.3 3.1 GRS 1915+105
262.8767 -33.7923 6.9 27.2 -141.1 -0.2947 -1.7 6.2 GX 354-0
301.8580 10.9546 0.3 31.7 57.9 11.4253 36.5 ------ UNKNOWN
293.4995 33.5633 2.4 46.4 27.3 2.5786 4.8 ------ UNKNOWN
262.1638 32.8993 2.8 46.1 -9.1 1.1913 4.1 ------ UNKNOWN
273.6470 -61.2439 2.7 50.8 -167.2 1.5741 4.2 ------ UNKNOWN
262.7278 -63.4969 2.5 54.1 -161.6 2.1166 4.6 ------ UNKNOWN
247.4020 27.3032 2.6 48.3 -27.9 1.5949 4.3 ------ UNKNOWN
236.8574 -25.5810 3.7 42.0 -106.8 2.4369 3.8 ------ UNKNOWN
UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
161.820600 723.220590
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
255.9015 -37.9522 11.7 44.7 -121.9 1.4416 1.0 7.6 4U 1700-377
256.4540 -36.3769 6.8 43.6 -120.2 2.2267 1.7 2.9 GX 349+2
262.9857 -24.7073 10.4 33.7 -106.7 0.6716 1.1 2.6 GX 1+4
264.9576 -44.6119 0.0 43.1 -135.4 -1.4286 -1.9 13.4 4U 1735-44
268.2524 -1.4687 2.5 27.9 -60.6 1.8913 4.6 7.0 SW J1753.5-0127
270.2523 -25.1472 2.5 27.9 -112.8 2.0824 4.7 4.4 GX 5-1
270.2284 -25.6854 9.4 28.1 -113.8 0.5809 1.3 5.3 GRS 1758-258
274.0069 -13.9917 1.5 20.8 -89.7 3.0223 7.8 2.7 GX 17+2
275.9245 -30.3236 4.5 26.9 -128.4 1.0755 2.6 2.6 H1820-303
284.9370 -24.9669 5.6 17.7 -135.5 0.7100 2.1 6.1 HT1900.1-2455
288.8246 10.9353 0.8 21.9 -3.2 5.3812 15.2 1.7 GRS 1915+105
299.5929 35.2080 0.4 45.5 18.5 24.4007 28.3 0.4 Cyg X-1
262.9962 -33.8020 4.0 37.7 -120.8 1.8801 2.9 2.0 GX 354-0
281.4515 11.2998 2.3 25.2 -19.3 1.7058 5.1 ------ UNKNOWN
277.3797 -23.8045 1.6 21.7 -118.4 2.3997 7.1 ------ UNKNOWN
Plot creation:
Sun May 31 09:09:44 EDT 2015