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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
336.2873 -57.0265 0.0031 18.0139 129.0832 3.4986993 61.912 TRIG_00324895
Foreground time interval of the image:
-2.400 15.189 (delta_t = 17.589 [sec])
Background time interval of the image:
-239.712 -2.400 (delta_t = 237.312 [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 -2.400 sec. to 88.640 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.54645 ( -0.0464583 0.0464766 )
Norm@50keV : 5.05471E-03 ( -0.000123388 0.000123375 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.29 using 59 PHA bins.
# Reduced chi-squared = 1.145 for 57 degrees of freedom
# Null hypothesis probability = 2.107742e-01
Photon flux (15-150 keV) in 91.04 sec: 0.639241 ( -0.0172814 0.0173338 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.3344e-06 ( -1.1139e-07 1.11558e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -2.400 sec. to 88.640 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.18588 ( -0.196426 0.188096 )
Epeak [keV] : 120.957 ( -24.6883 70.4308 )
Norm@50keV : 7.44362E-03 ( -0.00132807 0.00169746 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.18 using 59 PHA bins.
# Reduced chi-squared = 0.9676 for 56 degrees of freedom
# Null hypothesis probability = 5.439337e-01
Photon flux (15-150 keV) in 91.04 sec: 0.621801 ( -0.019219 0.019291 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.21998e-06 ( -1.27028e-07 1.26536e-07 ) ergs/cm2
Band function
Time interval is from -2.400 sec. to 88.640 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.85699 ( -2.21884 -1.00796 )
beta : -1.61995 ( 1.62204 0.0622143 )
Epeak [keV] : 31.8414 ( -6.68833 61.7822 )
Norm@50keV : 1.14894 ( -1.14565 107.836 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.40 using 59 PHA bins.
# Reduced chi-squared = 0.9345 for 55 degrees of freedom
# Null hypothesis probability = 6.130620e-01
Photon flux (15-150 keV) in 91.04 sec: 0.611192 ( ) 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] : 16.0512 ( )
R^2/D10^2 : 5.43848E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 350.29 using 59 PHA bins.
# Reduced chi-squared = 6.1455 for 57 degrees of freedom
# Null hypothesis probability = 8.772895e-44
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.636e-07 1.325e-08
25- 50 1.112e-06 3.869e-08
50-150 2.005e-06 9.241e-08
15-150 3.381e-06 9.241e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 2.59411 (-0.0631255 0.063125)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.69 using 59 PHA bins.
# Reduced chi-squared = 0.9769 for 57 degrees of freedom
# Null hypothesis probability = 5.245109e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.882e-07 1.757e-08
25- 50 1.132e-06 3.095e-08
50-150 2.482e-06 6.737e-08
15-150 4.201e-06 1.202e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.47493 (-0.688548 0.742623)
R1^2/D10^2 : 0.504559 (-0.135263 0.199217)
kT2 [keV] : 26.5089 (-2.25895 2.93403)
R2^2/D10^2 : 7.36208E-03 (-0.00236253 0.00294432)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.76 using 59 PHA bins.
# Reduced chi-squared = 0.9593 for 55 degrees of freedom
# Null hypothesis probability = 5.606258e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.184e-07 4.365e-08
25- 50 1.144e-06 5.736e-08
50-150 2.528e-06 1.611e-07
15-150 4.190e-06 2.240e-07
Peak spectrum fit
Power-law model
Time interval is from 1.252 sec. to 2.252 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.925280 ( -0.0989347 0.0972489 )
Norm@50keV : 2.34208E-02 ( -0.00138993 0.00138708 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.74 using 59 PHA bins.
# Reduced chi-squared = 0.9778 for 57 degrees of freedom
# Null hypothesis probability = 5.226172e-01
Photon flux (15-150 keV) in 1 sec: 2.68914 ( -0.16042 0.160571 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.60303e-07 ( -1.64922e-08 1.65484e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.252 sec. to 2.252 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.164148 ( -0.469172 0.421979 )
Epeak [keV] : 138.254 ( -32.1711 96.6626 )
Norm@50keV : 5.12235E-02 ( -0.0176198 0.0300768 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.51 using 59 PHA bins.
# Reduced chi-squared = 0.8126 for 56 degrees of freedom
# Null hypothesis probability = 8.406645e-01
Photon flux (15-150 keV) in 1 sec: 2.62263 ( -0.16477 0.16476 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.51558e-07 ( -1.7782e-08 1.7663e-08 ) ergs/cm2
Band function
Time interval is from 1.252 sec. to 2.252 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.895633 ( 0.895633 0.895633 )
beta : -0.925287 ( -0.0971987 0.0990545 )
Epeak [keV] : 13.5117 ( )
Norm@50keV : 3.49914E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.74 using 59 PHA bins.
# Reduced chi-squared = 1.013 for 55 degrees of freedom
# Null hypothesis probability = 4.469567e-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] : 22.2202 (-1.65842 1.85184)
R^2/D10^2 : 9.69709E-02 (-0.0214598 0.0267687)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.01 using 59 PHA bins.
# Reduced chi-squared = 1.211 for 57 degrees of freedom
# Null hypothesis probability = 1.322417e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.820e-09 1.036e-09
25- 50 4.691e-08 4.145e-09
50-150 1.731e-07 1.680e-08
15-150 2.288e-07 1.720e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 10.6496 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 157.35 using 59 PHA bins.
# Reduced chi-squared = 2.7605 for 57 degrees of freedom
# Null hypothesis probability = 2.464657e-11
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.652e-08 1.970e-09
25- 50 5.101e-08 4.115e-09
50-150 1.119e-07 2.449e-08
15-150 1.894e-07 2.480e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 11.4695 (-3.12014 3.73077)
R1^2/D10^2 : 0.389771 (-0.174788 0.433634)
kT2 [keV] : 37.5847 (-9.22046 37.9612)
R2^2/D10^2 : 1.46387E-02 (-0.012533 0.0240918)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.21 using 59 PHA bins.
# Reduced chi-squared = 0.7857 for 55 degrees of freedom
# Null hypothesis probability = 8.751218e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.358e-08 4.711e-09
25- 50 5.082e-08 1.630e-08
50-150 1.895e-07 8.471e-08
15-150 2.539e-07 9.845e-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: 1.19552 ( -0.045559 0.0453498 )
Norm@50keV : 1.34573E-02 ( -0.000337126 0.000336881 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.49 using 59 PHA bins.
# Reduced chi-squared = 1.096 for 57 degrees of freedom
# Null hypothesis probability = 2.876873e-01
Photon flux (15-150 keV) in 17.59 sec: 1.57862 ( -0.0423304 0.0424162 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.40461e-06 ( -6.28445e-08 6.29106e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.858579 ( -0.192324 0.184204 )
Epeak [keV] : 196.522 ( -50.3734 157.673 )
Norm@50keV : 1.88774E-02 ( -0.0031129 0.00389022 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.42 using 59 PHA bins.
# Reduced chi-squared = 0.9361 for 56 degrees of freedom
# Null hypothesis probability = 6.111857e-01
Photon flux (15-150 keV) in 17.59 sec: 1.54674 ( -0.04532 0.04543 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.36443e-06 ( -6.75984e-08 6.71234e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.398910 ( -0.568945 3.8005 )
beta : -1.32811 ( 1.3273 0.0992092 )
Epeak [keV] : 88.5205 ( -48.7064 168.208 )
Norm@50keV : 3.52885E-02 ( -0.019154 12.8722 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.56 using 59 PHA bins.
# Reduced chi-squared = 0.9193 for 55 degrees of freedom
# Null hypothesis probability = 6.446873e-01
Photon flux (15-150 keV) in 17.59 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) = 1.10e-06
S(50-100 keV) = 1.50e-06
T90 vs. Hardness ratio plot
T90 = 61.3479999899864 sec.
Hardness ratio (energy fluence ratio) = 1.36364
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.46456
Count Ratio (50-100 keV) / (15-25 keV) = 1.04543
Mask shadow pattern
IMX = -2.050141681261123E-01, IMY = -2.524209043282010E-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:
-239.712000 -2.400000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
256.0019 -37.8310 0.6 37.0 -28.8 4.7117 19.6 1.1 4U 1700-377
256.2778 -36.4991 4.8 38.0 -27.3 0.5825 2.4 8.9 GX 349+2
263.1052 -24.5968 7.7 45.8 -11.1 0.4862 1.5 10.4 GX 1+4
264.8892 -44.5516 7.8 27.7 -25.7 0.2450 1.5 8.7 4U 1735-44
270.4477 -25.1874 0.0 42.8 -2.6 -0.0904 -0.3 11.0 GX 5-1
270.3084 -25.6717 4.7 42.3 -3.0 0.6931 2.4 4.3 GRS 1758-258
274.0624 -13.9854 5.7 52.4 6.5 1.1157 2.0 4.5 GX 17+2
275.9252 -30.3661 9.6 36.2 1.7 0.2658 1.2 0.1 H1820-303
285.0451 -24.9603 3.0 39.2 16.9 0.9483 3.8 2.4 HT1900.1-2455
263.1264 -33.7611 5.3 37.6 -17.1 0.4802 2.2 8.1 GX 354-0
2.1619 -60.4692 2.4 27.9 154.5 1.0944 4.9 ------ UNKNOWN
248.0079 -48.8114 2.1 32.0 -48.9 1.2121 5.5 ------ UNKNOWN
222.5218 -56.5494 3.8 38.0 -77.3 1.6373 3.0 ------ UNKNOWN
203.7699 -62.3465 2.8 40.8 -94.2 3.7127 4.1 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-2.400000 15.188600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
256.1451 -37.9593 7.3 36.8 -28.7 0.1085 1.6 10.2 4U 1700-377
256.3712 -36.5224 4.3 37.9 -27.2 0.1955 2.7 6.7 GX 349+2
262.9127 -24.8985 5.6 45.6 -11.5 0.1896 2.1 10.6 GX 1+4
264.7330 -44.4445 63.1 27.8 -25.7 -0.0106 -0.2 0.5 4U 1735-44
270.1745 -25.1307 14.3 42.9 -2.9 0.0670 0.8 6.7 GX 5-1
270.2031 -25.8317 4.1 42.2 -3.3 0.2287 2.8 7.6 GRS 1758-258
274.0256 -13.9574 6.8 52.4 6.5 0.2780 1.7 4.9 GX 17+2
276.0431 -30.3905 15.6 36.2 1.9 -0.0538 -0.7 6.3 H1820-303
285.1033 -24.9245 5.3 39.2 17.0 -0.1864 -2.2 3.7 HT1900.1-2455
262.9617 -33.7693 11.9 37.6 -17.3 0.0697 1.0 4.2 GX 354-0
336.2873 -57.0265 0.2 18.0 129.1 3.4981 61.9 ------ UNKNOWN
78.8561 -65.4449 2.4 48.2 -161.2 0.5240 4.9 ------ UNKNOWN
239.4445 -26.5998 2.0 53.9 -37.2 1.4231 6.0 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
54.388610 962.302100
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
264.6746 -44.4602 6.8 44.7 -37.5 1.1922 1.7 3.0 4U 1735-44
270.2241 -25.0690 7.0 56.2 -16.3 2.3636 1.6 3.3 GX 5-1
270.3392 -25.6962 3.1 55.7 -16.6 5.0488 3.8 3.4 GRS 1758-258
275.9172 -30.3554 3.3 49.0 -15.3 2.5665 3.5 0.8 H1820-303
284.9267 -24.8991 18.2 48.6 -2.5 -0.5008 -0.6 6.1 HT1900.1-2455
262.9822 -33.8042 6.2 53.4 -29.0 2.2642 1.9 1.9 GX 354-0
292.4287 -35.3821 2.5 36.3 -4.1 2.3374 4.6 ------ UNKNOWN
238.6785 -68.1342 3.1 41.3 -77.6 7.1500 3.8 ------ UNKNOWN
Plot creation:
Sun May 31 06:21:59 EDT 2015