Estimated redshift from machine learning (Ukwatta et al. 2016) - may take a few minutes to calcaulte
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
295.0996 +21.0546 0.0147 44.3 21.9 1.0380 13.0 TRIG_01297508
------------------------------------------
Foreground time interval of the image:
-0.136 7.352 (delta_t = 7.488 [sec])
Background time interval of the image:
-239.176 -0.136 (delta_t = 239.040 [sec])
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) The mask-weighted light curves are using the flight position.
- 3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 4) 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.
- 5) 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.
- 6) 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)
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) For long bursts, a spectral fit of 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.
- 4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Time interval is from -0.136 sec. to 7.352 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.60768 ( -0.186321 0.189334 )
Norm@50keV : 9.58165E-03 ( -0.00113935 0.00113422 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.53 using 59 PHA bins.
# Reduced chi-squared = 0.9567 for 57 degrees of freedom
# Null hypothesis probability = 5.681210e-01
Photon flux (15-150 keV) in 7.488 sec: 1.23423 ( -0.148581 0.148965 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.70373e-07 ( -8.36402e-08 8.40962e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.136 sec. to 7.352 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.783370 ( -0.937008 0.768696 )
Epeak [keV] : 74.4806 ( -18.5255 231.917 )
Norm@50keV : 2.50320E-02 ( -0.0145894 0.0481466 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.14 using 59 PHA bins.
# Reduced chi-squared = 0.9133 for 56 degrees of freedom
# Null hypothesis probability = 6.588989e-01
Photon flux (15-150 keV) in 7.488 sec: 1.20277 ( -0.15159 0.15188 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.45269e-07 ( -8.8291e-08 8.83696e-08 ) ergs/cm2
Band function
Time interval is from -0.136 sec. to 7.352 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.69524 ( -4.56644 -3.29653 )
beta : -1.83736 ( 1.83254 0.273328 )
Epeak [keV] : 33.0833 ( -9.40561 158.446 )
Norm@50keV : 7.28739 ( -7.28627 143.662 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.02 using 59 PHA bins.
# Reduced chi-squared = 0.9276 for 55 degrees of freedom
# Null hypothesis probability = 6.274195e-01
Photon flux (15-150 keV) in 7.488 sec: 1.20938 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 6.48155e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.3728 (-1.82759 2.12393)
R^2/D10^2 : 0.166037 (-0.0659573 0.106064)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.25 using 59 PHA bins.
# Reduced chi-squared = 1.110 for 57 degrees of freedom
# Null hypothesis probability = 2.653999e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.410e-08 1.118e-08
25- 50 2.065e-07 3.519e-08
50-150 2.845e-07 5.530e-08
15-150 5.451e-07 8.622e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 165.137 (-62.6168 -165.135)
Norm : 5.12848 (-0.650925 0.759802)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.776e-08 3.056e-08
25- 50 1.836e-07 9.469e-08
50-150 3.766e-07 2.097e-07
15-150 6.580e-07 3.515e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.02043 (-2.98009 3.2809)
R1^2/D10^2 : 0.823498 (-0.263518 2.83104)
kT2 [keV] : 25.0881 (-7.6428 26.7103)
R2^2/D10^2 : 1.54442E-02 (-0.0140072 0.054191)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.449e-08 4.680e-08
25- 50 1.981e-07 1.052e-07
50-150 3.681e-07 2.043e-07
15-150 6.506e-07 3.083e-07
Peak spectrum fit
Power-law model
Time interval is from -0.156 sec. to 0.844 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.30782 ( -0.220977 0.218873 )
Norm@50keV : 2.64203E-02 ( -0.00365584 0.00365552 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.26 using 59 PHA bins.
# Reduced chi-squared = 1.022 for 57 degrees of freedom
# Null hypothesis probability = 4.286760e-01
Photon flux (15-150 keV) in 1 sec: 3.15660 ( -0.456857 0.458069 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.60586e-07 ( -3.82583e-08 3.83765e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.156 sec. to 0.844 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.694089 ( -1.11387 0.718996 )
Epeak [keV] : 116.404 ( -45.163 -116.401 )
Norm@50keV : 5.18638E-02 ( -0.0279394 0.118987 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.95 using 59 PHA bins.
# Reduced chi-squared = 1.017 for 56 degrees of freedom
# Null hypothesis probability = 4.395066e-01
Photon flux (15-150 keV) in 1 sec: 3.11781 ( -0.46021 0.46153 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.56549e-07 ( -4.0006e-08 3.9504e-08 ) ergs/cm2
Band function
Time interval is from -0.156 sec. to 0.844 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -5.95850E-02 ( -0.076429 -0.076429 )
beta : -1.61221 ( 1.66049 0.464858 )
Epeak [keV] : 69.0968 ( -65.8132 195.313 )
Norm@50keV : 0.122901 ( -0.165016 274.125 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.12 using 59 PHA bins.
# Reduced chi-squared = 1.020 for 55 degrees of freedom
# Null hypothesis probability = 4.326264e-01
Photon flux (15-150 keV) in 1 sec: 3.24383 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.55571e-07 ( -2.55564e-07 -3.9229e-08 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 17.4823 (-2.6581 3.3068)
R^2/D10^2 : 0.233555 (-0.106091 0.179003)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.442e-08 3.954e-09
25- 50 6.523e-08 1.403e-08
50-150 1.436e-07 3.635e-08
15-150 2.232e-07 4.395e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-48.1123 -200)
Norm : 13.3064 (-1.86038 1.86038)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.314e-08 1.880e-08
25- 50 6.374e-08 3.573e-08
50-150 1.398e-07 7.750e-08
15-150 2.367e-07 1.312e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 11.3048 (-4.8328 4.0515)
R1^2/D10^2 : 0.731846 (-0.413685 2.33074)
kT2 [keV] : 45.4667 (-25.2552 -47.7254)
R2^2/D10^2 : 6.56102E-03 (-0.00529592 0.0757956)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.123e-08 1.231e-08
25- 50 6.874e-08 3.801e-08
50-150 1.670e-07 8.390e-08
15-150 2.570e-07 1.293e-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: 1.60768 ( -0.186321 0.189334 )
Norm@50keV : 9.58165E-03 ( -0.00113935 0.00113422 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.53 using 59 PHA bins.
# Reduced chi-squared = 0.9567 for 57 degrees of freedom
# Null hypothesis probability = 5.681210e-01
Photon flux (15-150 keV) in 7.488 sec: 1.23423 ( -0.148581 0.148965 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.70373e-07 ( -8.36402e-08 8.40962e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.783370 ( -0.937008 0.768696 )
Epeak [keV] : 74.4806 ( -18.5255 231.917 )
Norm@50keV : 2.50320E-02 ( -0.0145894 0.0481466 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.14 using 59 PHA bins.
# Reduced chi-squared = 0.9133 for 56 degrees of freedom
# Null hypothesis probability = 6.588989e-01
Photon flux (15-150 keV) in 7.488 sec: 1.20277 ( -0.15159 0.15188 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.45269e-07 ( -8.8291e-08 8.83696e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.69541 ( -9.86629 -3.2967 )
beta : -1.83736 ( 1.83253 0.278825 )
Epeak [keV] : 33.0829 ( -9.40788 158.414 )
Norm@50keV : 7.28946 ( -7.28834 143.677 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.02 using 59 PHA bins.
# Reduced chi-squared = 0.9276 for 55 degrees of freedom
# Null hypothesis probability = 6.274194e-01
Photon flux (15-150 keV) in 7.488 sec: 1.20938 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 6.48155e-07 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 1.74e-07
S(50-100 keV) = 2.29e-07
T90 vs. Hardness ratio plot
T90 = 6.20799994468689 sec.
Hardness ratio (energy fluence ratio) = 1.31609
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.76851
Count Ratio (50-100 keV) / (15-25 keV) = 1.26991
Mask shadow pattern
IMX = 9.050565584376378E-01, IMY = -3.644464733902320E-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:
-239.176000 -0.136000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
299.5793 35.2227 0.8 32.6 36.5 6.9478 14.2 1.4 Cyg X-1
308.0926 40.9840 3.8 24.1 41.6 1.2173 3.1 2.0 Cyg X-3
326.1578 38.5322 0.0 12.6 14.6 0.6958 2.3 12.6 Cyg X-2
67.3748 70.3635 2.8 47.4 155.9 4.1891 4.2 ------ UNKNOWN
318.7513 63.2867 3.4 22.4 102.5 1.4919 3.5 ------ UNKNOWN
336.6955 11.0821 2.5 33.8 -43.9 2.1492 4.7 ------ UNKNOWN
314.4778 -9.4121 2.5 59.1 -20.5 6.6565 4.7 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.136000 7.352000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
299.4288 35.1972 5.0 32.7 36.6 0.1118 2.3 7.9 Cyg X-1
308.1105 40.9543 429.2 24.1 41.5 0.0010 0.0 0.1 Cyg X-3
326.1086 38.3554 7.1 12.7 14.0 0.0505 1.6 3.6 Cyg X-2
295.0996 21.0545 0.9 44.3 21.9 1.0390 13.0 ------ UNKNOWN
27.0012 24.5787 2.5 42.2 -128.6 0.3256 4.6 ------ UNKNOWN
6.2279 11.8982 2.5 39.3 -92.7 0.4646 4.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
107.124600 375.624600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.5368 35.2403 575.1 38.1 111.9 0.0230 0.0 7.3 Her X-1
268.4194 -1.3667 4.0 34.4 43.8 -2.0725 -2.9 6.0 SW J1753.5-0127
270.3419 -25.0793 4.7 52.0 19.9 2.9296 2.5 3.1 GX 5-1
270.3194 -25.8335 5.6 52.7 19.5 -2.5410 -2.1 5.5 GRS 1758-258
274.0061 -14.0366 224.5 40.7 23.5 0.0352 0.1 0.0 GX 17+2
275.8503 -30.3968 3.9 54.6 11.5 3.8223 3.0 4.3 H1820-303
284.9833 -25.0498 10.0 47.1 3.7 -0.7550 -1.2 8.3 HT1900.1-2455
288.8120 10.9421 3.8 11.7 22.9 1.1421 3.0 0.8 GRS 1915+105
299.5544 35.2092 0.6 14.7 -174.2 7.3791 18.4 1.8 Cyg X-1
308.1431 40.9401 3.0 22.8 -162.6 1.4018 3.8 1.7 Cyg X-3
326.1708 38.4314 10.9 31.9 -138.8 0.5449 1.1 6.6 Cyg X-2
247.8472 54.3400 2.3 48.6 136.4 8.0743 5.0 ------ UNKNOWN
263.5028 -18.7398 2.5 50.4 31.2 6.1170 4.7 ------ UNKNOWN
324.8563 66.6556 3.0 49.4 -173.8 3.4582 3.9 ------ UNKNOWN
Plot creation:
Sat Mar 22 01:08:14 EDT 2025