$ ack Warning *.ipynb
astropy_introduction.ipynb
429:      "WARNING: UnitsWarning: 'photon/cm**2/MeV/s' contains multiple slashes, which is discouraged by the FITS standard [astropy.units.format.generic]\n",
430:      "WARNING: UnitsWarning: 'photon/cm**2/s' contains multiple slashes, which is discouraged by the FITS standard [astropy.units.format.generic]\n",
431:      "WARNING: UnitsWarning: The unit 'erg' has been deprecated in the FITS standard. Suggested: cm2 g s-2. [astropy.units.format.utils]\n",
432:      "WARNING: UnitsWarning: 'erg/cm**2/s' contains multiple slashes, which is discouraged by the FITS standard [astropy.units.format.generic]\n"
665:      "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/numpy/lib/nanfunctions.py:1304: RuntimeWarning: invalid value encountered in subtract\n",
667:      "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/numpy/lib/nanfunctions.py:1304: RuntimeWarning: invalid value encountered in subtract\n",
669:      "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/numpy/lib/nanfunctions.py:1304: RuntimeWarning: invalid value encountered in subtract\n",
671:      "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/numpy/lib/nanfunctions.py:1304: RuntimeWarning: invalid value encountered in subtract\n",
673:      "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/numpy/lib/nanfunctions.py:1304: RuntimeWarning: invalid value encountered in subtract\n",
675:      "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/numpy/lib/nanfunctions.py:1304: RuntimeWarning: invalid value encountered in subtract\n",
677:      "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/numpy/lib/nanfunctions.py:1304: RuntimeWarning: invalid value encountered in subtract\n",
679:      "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/numpy/lib/nanfunctions.py:1304: RuntimeWarning: invalid value encountered in subtract\n",
681:      "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/numpy/lib/nanfunctions.py:1304: RuntimeWarning: invalid value encountered in subtract\n",
683:      "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/numpy/lib/nanfunctions.py:1304: RuntimeWarning: invalid value encountered in subtract\n",
685:      "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/numpy/lib/nanfunctions.py:1304: RuntimeWarning: invalid value encountered in subtract\n",
687:      "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/numpy/lib/nanfunctions.py:1304: RuntimeWarning: invalid value encountered in subtract\n",
689:      "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/numpy/lib/nanfunctions.py:1304: RuntimeWarning: invalid value encountered in subtract\n",
691:      "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/numpy/lib/nanfunctions.py:1304: RuntimeWarning: invalid value encountered in subtract\n",
693:      "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/numpy/lib/nanfunctions.py:1304: RuntimeWarning: invalid value encountered in subtract\n",
695:      "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/numpy/lib/nanfunctions.py:1304: RuntimeWarning: invalid value encountered in subtract\n",
697:      "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/numpy/lib/nanfunctions.py:1304: RuntimeWarning: invalid value encountered in subtract\n",
699:      "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/numpy/lib/nanfunctions.py:1304: RuntimeWarning: invalid value encountered in subtract\n",
701:      "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/numpy/lib/nanfunctions.py:1304: RuntimeWarning: invalid value encountered in subtract\n",
703:      "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/numpy/lib/nanfunctions.py:1304: RuntimeWarning: invalid value encountered in subtract\n",
705:      "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/numpy/lib/nanfunctions.py:1304: RuntimeWarning: invalid value encountered in subtract\n",
707:      "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/numpy/lib/nanfunctions.py:1304: RuntimeWarning: invalid value encountered in subtract\n",
709:      "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/numpy/lib/nanfunctions.py:1304: RuntimeWarning: invalid value encountered in subtract\n",
711:      "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/numpy/lib/nanfunctions.py:1304: RuntimeWarning: invalid value encountered in subtract\n",
713:      "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/numpy/lib/nanfunctions.py:1304: RuntimeWarning: invalid value encountered in subtract\n",
715:      "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/numpy/lib/nanfunctions.py:1304: RuntimeWarning: invalid value encountered in subtract\n",

background_model.ipynb
204:      "WARNING: AstropyDeprecationWarning: The truth value of a Quantity is ambiguous. In the future this will raise a ValueError. [astropy.units.quantity]\n"

cta_1dc_analysis_msh15-52.ipynb
735:      "/Users/roberta/gammapy/gammapy/cube/core.py:76: RuntimeWarning: divide by zero encountered in log\n",
737:      "/Users/roberta/anaconda2/envs/cta/lib/python3.5/site-packages/scipy/interpolate/interpolate.py:2382: RuntimeWarning: invalid value encountered in multiply\n",
1040:      "WARNING: AstropyDeprecationWarning: \"clobber\" was deprecated in version 2.0 and will be removed in a future version. Use argument \"overwrite\" instead. [gammapy.image.core]\n"
1071:      "/Users/roberta/gammapy/gammapy/stats/poisson.py:237: RuntimeWarning: invalid value encountered in greater_equal\n",
1177:      "/Users/roberta/anaconda2/envs/cta/lib/python3.5/site-packages/photutils/detection/core.py:241: RuntimeWarning: invalid value encountered in greater\n",
1540:      "/Users/roberta/anaconda2/envs/cta/lib/python3.5/site-packages/astropy/units/quantity.py:1059: RuntimeWarning: invalid value encountered in true_divide\n",
1619:      "/Users/roberta/gammapy/gammapy/stats/fit_statistics.py:161: RuntimeWarning: divide by zero encountered in log\n",
1621:      "/Users/roberta/gammapy/gammapy/stats/fit_statistics.py:166: RuntimeWarning: divide by zero encountered in log\n",
1623:      "/Users/roberta/gammapy/gammapy/stats/fit_statistics.py:203: RuntimeWarning: divide by zero encountered in log\n",
1625:      "/Users/roberta/gammapy/gammapy/stats/fit_statistics.py:204: RuntimeWarning: divide by zero encountered in log\n",
1773:      "/Users/roberta/gammapy/gammapy/stats/poisson.py:383: RuntimeWarning: divide by zero encountered in double_scalars\n",
1775:      "/Users/roberta/gammapy/gammapy/stats/poisson.py:384: RuntimeWarning: divide by zero encountered in log\n",
1806:      "/Users/roberta/gammapy/gammapy/stats/fit_statistics.py:161: RuntimeWarning: divide by zero encountered in log\n",
1808:      "/Users/roberta/gammapy/gammapy/stats/fit_statistics.py:166: RuntimeWarning: divide by zero encountered in log\n",
1810:      "/Users/roberta/gammapy/gammapy/stats/fit_statistics.py:203: RuntimeWarning: divide by zero encountered in log\n",
1812:      "/Users/roberta/gammapy/gammapy/stats/fit_statistics.py:204: RuntimeWarning: divide by zero encountered in log\n",

cta_data_analysis.ipynb
526:      "/Users/deil/software/anaconda3/envs/gammapy-dev/lib/python3.6/site-packages/photutils/detection/core.py:241: RuntimeWarning: invalid value encountered in greater\n",
903:      "/Users/deil/work/code/gammapy/gammapy/spectrum/observation.py:849: RuntimeWarning: invalid value encountered in true_divide\n",
905:      "/Users/deil/software/anaconda3/envs/gammapy-dev/lib/python3.6/site-packages/astropy/units/quantity.py:639: RuntimeWarning: invalid value encountered in true_divide\n",
907:      "WARNING: AstropyDeprecationWarning: The truth value of a Quantity is ambiguous. In the future this will raise a ValueError. [astropy.units.quantity]\n",
908:      "WARNING:astropy:AstropyDeprecationWarning: The truth value of a Quantity is ambiguous. In the future this will raise a ValueError.\n"

cta_sensitivity.ipynb
71:      "/Users/deil/software/anaconda3/envs/gammapy-dev/lib/python3.6/site-packages/astropy/units/quantity.py:639: RuntimeWarning: invalid value encountered in true_divide\n",

cta_simulation.ipynb
239:      "/home/kingj/Software/miniconda3/envs/headversions/lib/python3.5/site-packages/astropy-3.0.dev20201-py3.5-linux-x86_64.egg/astropy/units/quantity.py:1053: RuntimeWarning: invalid value encountered in true_divide\n",
278:      "/home/kingj/Software/miniconda3/envs/headversions/lib/python3.5/site-packages/astropy-3.0.dev20201-py3.5-linux-x86_64.egg/astropy/units/quantity.py:1053: RuntimeWarning: invalid value encountered in true_divide\n",
416:      "/home/kingj/Software/miniconda3/envs/headversions/lib/python3.5/site-packages/astropy-3.0.dev20201-py3.5-linux-x86_64.egg/astropy/units/quantity.py:1053: RuntimeWarning: invalid value encountered in true_divide\n",
551:      "/home/kingj/Software/gammapy/gammapy/stats/poisson.py:382: RuntimeWarning: divide by zero encountered in double_scalars\n",
553:      "/home/kingj/Software/gammapy/gammapy/stats/poisson.py:383: RuntimeWarning: invalid value encountered in multiply\n",
555:      "/home/kingj/Software/gammapy/gammapy/stats/poisson.py:384: RuntimeWarning: invalid value encountered in multiply\n",
557:      "/home/kingj/Software/gammapy/gammapy/stats/poisson.py:384: RuntimeWarning: divide by zero encountered in log\n",

data_fermi_lat.ipynb
434:      "/home/hfm/adonath/Software/Applications/anaconda3.5/envs/gammapy-dev/lib/python3.6/importlib/_bootstrap.py:205: RuntimeWarning: numpy.dtype size changed, may indicate binary incompatibility. Expected 96, got 88\n",
502:      "/home/hfm/adonath/github/adonath/gammapy/gammapy/maps/hpxnd.py:383: FutureWarning: Using a non-tuple sequence for multidimensional indexing is deprecated; use `arr[tuple(seq)]` instead of `arr[seq]`. In the future this will be interpreted as an array index, `arr[np.array(seq)]`, which will result either in an error or a different result.\n",

first_steps.ipynb
1268:      "/home/hfm/adonath/github/adonath/gammapy/gammapy/spectrum/utils.py:241: FutureWarning: Using a non-tuple sequence for multidimensional indexing is deprecated; use `arr[tuple(seq)]` instead of `arr[seq]`. In the future this will be interpreted as an array index, `arr[np.array(seq)]`, which will result either in an error or a different result.\n",
1270:      "/home/hfm/adonath/github/adonath/gammapy/gammapy/spectrum/utils.py:246: FutureWarning: Using a non-tuple sequence for multidimensional indexing is deprecated; use `arr[tuple(seq)]` instead of `arr[seq]`. In the future this will be interpreted as an array index, `arr[np.array(seq)]`, which will result either in an error or a different result.\n",
1272:      "/home/hfm/adonath/github/adonath/gammapy/gammapy/spectrum/utils.py:247: FutureWarning: Using a non-tuple sequence for multidimensional indexing is deprecated; use `arr[tuple(seq)]` instead of `arr[seq]`. In the future this will be interpreted as an array index, `arr[np.array(seq)]`, which will result either in an error or a different result.\n",
1274:      "/home/hfm/adonath/github/adonath/gammapy/gammapy/spectrum/utils.py:248: FutureWarning: Using a non-tuple sequence for multidimensional indexing is deprecated; use `arr[tuple(seq)]` instead of `arr[seq]`. In the future this will be interpreted as an array index, `arr[np.array(seq)]`, which will result either in an error or a different result.\n",
1276:      "/home/hfm/adonath/github/adonath/gammapy/gammapy/spectrum/utils.py:250: FutureWarning: Using a non-tuple sequence for multidimensional indexing is deprecated; use `arr[tuple(seq)]` instead of `arr[seq]`. In the future this will be interpreted as an array index, `arr[np.array(seq)]`, which will result either in an error or a different result.\n",

hgps.ipynb
1665:      "/home/hfm/adonath/github/adonath/gammapy/gammapy/spectrum/utils.py:241: FutureWarning: Using a non-tuple sequence for multidimensional indexing is deprecated; use `arr[tuple(seq)]` instead of `arr[seq]`. In the future this will be interpreted as an array index, `arr[np.array(seq)]`, which will result either in an error or a different result.\n",
1667:      "/home/hfm/adonath/github/adonath/gammapy/gammapy/spectrum/utils.py:246: FutureWarning: Using a non-tuple sequence for multidimensional indexing is deprecated; use `arr[tuple(seq)]` instead of `arr[seq]`. In the future this will be interpreted as an array index, `arr[np.array(seq)]`, which will result either in an error or a different result.\n",
1669:      "/home/hfm/adonath/github/adonath/gammapy/gammapy/spectrum/utils.py:247: FutureWarning: Using a non-tuple sequence for multidimensional indexing is deprecated; use `arr[tuple(seq)]` instead of `arr[seq]`. In the future this will be interpreted as an array index, `arr[np.array(seq)]`, which will result either in an error or a different result.\n",
1671:      "/home/hfm/adonath/github/adonath/gammapy/gammapy/spectrum/utils.py:248: FutureWarning: Using a non-tuple sequence for multidimensional indexing is deprecated; use `arr[tuple(seq)]` instead of `arr[seq]`. In the future this will be interpreted as an array index, `arr[np.array(seq)]`, which will result either in an error or a different result.\n",
1673:      "/home/hfm/adonath/github/adonath/gammapy/gammapy/spectrum/utils.py:250: FutureWarning: Using a non-tuple sequence for multidimensional indexing is deprecated; use `arr[tuple(seq)]` instead of `arr[seq]`. In the future this will be interpreted as an array index, `arr[np.array(seq)]`, which will result either in an error or a different result.\n",

image_fitting_with_sherpa.ipynb
79:    "# You may see a Warning concerning XSPEC\n",

light_curve.ipynb
120:      "/home/jlenain/local/src/python/anaconda/envs/cta/lib/python3.5/site-packages/astropy/units/quantity.py:641: RuntimeWarning: invalid value encountered in true_divide\n",

simulate_3d.ipynb
272:      "WARNING: AstropyDeprecationWarning: The truth value of a Quantity is ambiguous. In the future this will raise a ValueError. [astropy.units.quantity]\n"
305:      "/Users/deil/software/anaconda3/envs/gammapy-dev/lib/python3.6/site-packages/astropy/units/quantity.py:639: RuntimeWarning: invalid value encountered in true_divide\n",

spectrum_analysis.ipynb
674:      "/home/hfm/adonath/github/adonath/gammapy/gammapy/spectrum/core.py:166: RuntimeWarning: invalid value encountered in sqrt\n",