File: C:/Users/fred/anaconda3/Lib/site-packages/astropy/wcs/tests/data/spectra/orion-freq-4.hdr
SIMPLE = T / file does conform to FITS standard BITPIX = -32 / number of bits per data pixel NAXIS = 4 / number of data axes NAXIS1 = 4096 / length of data axis 1 NAXIS2 = 1 / length of data axis 2 NAXIS3 = 1 / length of data axis 3 NAXIS4 = 1 / length of data axis 4 EXTEND = T / FITS dataset may contain extensions COMMENT FITS (Flexible Image Transport System) format is defined in 'AstronomyCOMMENT and Astrophysics', volume 376, page 359; bibcode: 2001A&A...376..359H COMMENT COMMENT This FITS file contains an example spectral WCS header constructed by COMMENT Mark Calabretta (ATNF) and Dirk Petry (ESO) based on an observation COMMENT of the Orion Kleinmann-Low nebula made by Andrew Walsh (JCU) and COMMENT Sven Thorwirth (MPIfR) using the Mopra radio telescope. COMMENT COMMENT The 110GHz 13CO 1-0 spectrum in this file is linear in frequency, as COMMENT observed, it being the Fourier transform of a lag spectrum produced COMMENT by a correlating spectrometer. COMMENT COMMENT The reference pixel has been placed deliberately well outside the COMMENT the spectrum in order to test spectral-WCS-interpreting software. COMMENT COMMENT Spectral representations are: COMMENT Frequency (default) ...frequency-like COMMENT E: Photon energy ...frequency-like COMMENT N: Wave number ...frequency-like COMMENT R: Radio velocity ...frequency-like COMMENT W: Wavelength ...wavelength-like COMMENT O: Optical velocity ...wavelength-like COMMENT Z: Redshift ...wavelength-like COMMENT V: Relativistic velocity ...velocity-like COMMENT B: Relativistic beta ...velocity-like COMMENT COMMENT The Mopra radio telescope is operated by the Australia Telescope COMMENT National Facility. COMMENT COMMENT Author: Mark Calabretta, Australia Telescope National Facility COMMENT http://www.atnf.csiro.au/~mcalabre/index.html COMMENT 2009-04-22 COMMENT ---------------------------------------------------------------------- COMMENT OBJECT = 'Orion-KL' / Orion Kleinmann-Low nebula MOLECULE= '13CO ' / Carbon(13) monoxide TRANSITI= '1-0 ' / 1-0 transition DATE-OBS= '2006-07-09T20:29:00' / Date of observation TELESCOP= 'ATNF Mopra' / 22m mm-wave telescope OBSERVER= 'Walsh/Thorwirth' / Observers BUNIT = 'K ' / Brightness units, Kelvin COMMENT COMMENT ------------------------------------------------------------ Frequency COMMENT CRPIX1 = 32768.0 / Pixel coordinate of reference point CTYPE1 = 'FREQ ' / Linear frequency axis (FFT of lag spectrum) CRVAL1 = 102.1189414E+9 / [Hz] Frequency of reference channel CDELT1 = -2.695372970E+5 / [Hz] Channel spacing (lower sideband) CUNIT1 = 'Hz ' / Units of coordinate increment and value COMMENT RESTFRQ = 110201353000.0 / [Hz] 13CO line rest frequency RESTWAV = 0.00272040633 / [m] 13CO line rest wavelength SPECSYS = 'LSRK ' / Reference frame of spectral coordinates SSYSOBS = 'TOPOCENT' / Reference frame of observation VELOSYS = 0.0 / [m/s] Bary-topo velocity towards the source SSYSSRC = 'LSRK ' / Reference frame of source redshift ZSOURCE = 0.0000 / Redshift of the source COMMENT CRPIX2 = 1 CDELT2 = 1.0 CTYPE2 = 'RA ' CRVAL2 = 83.81042 / [deg] (05h35m14.5s) CUNIT2 = 'deg ' COMMENT CRPIX3 = 1 CDELT3 = 1.0 CTYPE3 = 'DEC ' CRVAL3 = -5.375222 / [deg] (-05:22:30.8) CUNIT3 = 'deg ' COMMENT RADESYS = 'FK5 ' / FK5 (IAU 1984) equatorial coordinates EQUINOX = 2000.0 / Equinox J2000.0 COMMENT CRPIX4 = 1 CDELT4 = 1.0 CTYPE4 = 'STOKES ' CRVAL4 = 1 / Stokes I (total intensity) COMMENT COMMENT -------------------------------------------------------- Photon energy COMMENT CRPIX1E = 32768.0 / Pixel coordinate of reference point CTYPE1E = 'ENER ' / Photon energy, linear frequency axis CRVAL1E = 4.223303869E-4 / [eV] Photon energy of reference channel CDELT1E = -1.114717695E-9 / [eV] Channel spacing CUNIT1E = 'eV ' / Units of coordinate increment and value COMMENT RESTFRQE= 110201353000.0 / [Hz] 13CO line rest frequency RESTWAVE= 0.00272040633 / [m] 13CO line rest wavelength SPECSYSE= 'LSRK ' / Reference frame of spectral coordinates SSYSOBSE= 'TOPOCENT' / Reference frame of observation VELOSYSE= 0.0 / [m/s] Bary-topo velocity towards the source SSYSSRCE= 'LSRK ' / Reference frame of source redshift ZSOURCEE= 0.0000 / Redshift of the source COMMENT CRPIX2E = 1 CDELT2E = 1.0 CTYPE2E = 'RA ' CRVAL2E = 83.81042 / [deg] (05h35m14.5s) CUNIT2E = 'deg ' COMMENT CRPIX3E = 1 CDELT3E = 1.0 CTYPE3E = 'DEC ' CRVAL3E = -5.375222 / [deg] (-05:22:30.8) CUNIT3E = 'deg ' COMMENT RADESYSE= 'FK5 ' / FK5 (IAU 1984) equatorial coordinates EQUINOXE= 2000.0 / Equinox J2000.0 COMMENT CRPIX4E = 1 CDELT4E = 1.0 CTYPE4E = 'STOKES ' CRVAL4E = 1 / Stokes I (total intensity) COMMENT COMMENT ---------------------------------------------------------- Wave number COMMENT N: Wave number COMMENT CRPIX1N = 32768.0 / Pixel coordinate of reference point CTYPE1N = 'WAVN ' / Wave number, linear frequency axis CRVAL1N = 3.406321229E+2 / [/m] Wave number of reference channel CDELT1N = -8.990796460E-4 / [/m] Channel spacing CUNIT1N = '/m ' / Units of coordinate increment and value COMMENT RESTFRQN= 110201353000.0 / [Hz] 13CO line rest frequency RESTWAVN= 0.00272040633 / [m] 13CO line rest wavelength SPECSYSN= 'LSRK ' / Reference frame of spectral coordinates SSYSOBSN= 'TOPOCENT' / Reference frame of observation VELOSYSN= 0.0 / [m/s] Bary-topo velocity towards the source SSYSSRCN= 'LSRK ' / Reference frame of source redshift ZSOURCEN= 0.0000 / Redshift of the source COMMENT CRPIX2N = 1 CDELT2N = 1.0 CTYPE2N = 'RA ' CRVAL2N = 83.81042 / [deg] (05h35m14.5s) CUNIT2N = 'deg ' COMMENT CRPIX3N = 1 CDELT3N = 1.0 CTYPE3N = 'DEC ' CRVAL3N = -5.375222 / [deg] (-05:22:30.8) CUNIT3N = 'deg ' COMMENT RADESYSN= 'FK5 ' / FK5 (IAU 1984) equatorial coordinates EQUINOXN= 2000.0 / Equinox J2000.0 COMMENT CRPIX4N = 1 CDELT4N = 1.0 CTYPE4N = 'STOKES ' CRVAL4N = 1 / Stokes I (total intensity) COMMENT COMMENT ------------------------------------------------------- Radio velocity COMMENT N: Wave number COMMENT R: Radio velocity COMMENT CRPIX1R = 32768.0 / Pixel coordinate of reference point CTYPE1R = 'VRAD ' / Radio velocity, linear frequency axis CRVAL1R = 2.198744369E+7 / [m/s] Radio velocity of reference channel CDELT1R = 7.332509683E+2 / [m/s] Channel spacing CUNIT1R = 'm/s ' / Units of coordinate increment and value COMMENT RESTFRQR= 110201353000.0 / [Hz] 13CO line rest frequency RESTWAVR= 0.00272040633 / [m] 13CO line rest wavelength SPECSYSR= 'LSRK ' / Reference frame of spectral coordinates SSYSOBSR= 'TOPOCENT' / Reference frame of observation VELOSYSR= 0.0 / [m/s] Bary-topo velocity towards the source SSYSSRCR= 'LSRK ' / Reference frame of source redshift ZSOURCER= 0.0000 / Redshift of the source COMMENT CRPIX2R = 1 CDELT2R = 1.0 CTYPE2R = 'RA ' CRVAL2R = 83.81042 / [deg] (05h35m14.5s) CUNIT2R = 'deg ' COMMENT CRPIX3R = 1 CDELT3R = 1.0 CTYPE3R = 'DEC ' CRVAL3R = -5.375222 / [deg] (-05:22:30.8) CUNIT3R = 'deg ' COMMENT RADESYSR= 'FK5 ' / FK5 (IAU 1984) equatorial coordinates EQUINOXR= 2000.0 / Equinox J2000.0 COMMENT CRPIX4R = 1 CDELT4R = 1.0 CTYPE4R = 'STOKES ' CRVAL4R = 1 / Stokes I (total intensity) COMMENT COMMENT ----------------------------------------------------------- Wavelength COMMENT N: Wave number COMMENT R: Radio velocity COMMENT W: Wavelength COMMENT CRPIX1W = 32768.0 / Pixel coordinate of reference point CTYPE1W = 'WAVE-F2W' / Wavelength in vacuuo, non-linear axis CRVAL1W = 2.935718427E-3 / [m] Wavelength of reference channel CDELT1W = 7.748666397E-9 / [m] Channel spacing CUNIT1W = 'm ' / Units of coordinate increment and value COMMENT SPECSYSW= 'LSRK ' / Reference frame of spectral coordinates SSYSOBSW= 'TOPOCENT' / Reference frame of observation VELOSYSW= 0.0 / [m/s] Bary-topo velocity towards the source SSYSSRCW= 'LSRK ' / Reference frame of source redshift ZSOURCEW= 0.0000 / Redshift of the source COMMENT CRPIX2W = 1 CDELT2W = 1.0 CTYPE2W = 'RA ' CRVAL2W = 83.81042 / [deg] (05h35m14.5s) CUNIT2W = 'deg ' COMMENT CRPIX3W = 1 CDELT3W = 1.0 CTYPE3W = 'DEC ' CRVAL3W = -5.375222 / [deg] (-05:22:30.8) CUNIT3W = 'deg ' COMMENT RADESYSW= 'FK5 ' / FK5 (IAU 1984) equatorial coordinates EQUINOXW= 2000.0 / Equinox J2000.0 COMMENT CRPIX4W = 1 CDELT4W = 1.0 CTYPE4W = 'STOKES ' CRVAL4W = 1 / Stokes I (total intensity) COMMENT COMMENT ----------------------------------------------------- Optical velocity COMMENT CRPIX1O = 32768.0 / Pixel coordinate of reference point CTYPE1O = 'VOPT-F2W' / Optical velocity, non-linear axis CRVAL1O = 2.372768470E+7 / [m/s] Optical velocity of reference channel CDELT1O = 8.539135209E+2 / [m/s] Channel spacing CUNIT1O = 'm/s ' / Units of coordinate increment and value COMMENT RESTFRQO= 110201353000.0 / [Hz] 13CO line rest frequency RESTWAVO= 0.00272040633 / [m] 13CO line rest wavelength SPECSYSO= 'LSRK ' / Reference frame of spectral coordinates SSYSOBSO= 'TOPOCENT' / Reference frame of observation VELOSYSO= 0.0 / [m/s] Bary-topo velocity towards the source SSYSSRCO= 'LSRK ' / Reference frame of source redshift ZSOURCEO= 0.0000 / Redshift of the source COMMENT CRPIX2O = 1 CDELT2O = 1.0 CTYPE2O = 'RA ' CRVAL2O = 83.81042 / [deg] (05h35m14.5s) CUNIT2O = 'deg ' COMMENT CRPIX3O = 1 CDELT3O = 1.0 CTYPE3O = 'DEC ' CRVAL3O = -5.375222 / [deg] (-05:22:30.8) CUNIT3O = 'deg ' COMMENT RADESYSO= 'FK5 ' / FK5 (IAU 1984) equatorial coordinates EQUINOXO= 2000.0 / Equinox J2000.0 COMMENT CRPIX4O = 1 CDELT4O = 1.0 CTYPE4O = 'STOKES ' CRVAL4O = 1 / Stokes I (total intensity) COMMENT COMMENT ------------------------------------------------------------- Redshift COMMENT N: Wave number COMMENT R: Radio velocity COMMENT W: Wavelength COMMENT O: Optical velocity COMMENT Z: Redshift COMMENT CRPIX1Z = 32768.0 / Pixel coordinate of reference point CTYPE1Z = 'ZOPT-F2W' / Redshift, non-linear axis CRVAL1Z = 7.914703679E-2 / [] Redshift of reference channel CDELT1Z = 2.848348910E-6 / [] Channel spacing COMMENT RESTFRQZ= 110201353000.0 / [Hz] 13CO line rest frequency RESTWAVZ= 0.00272040633 / [m] 13CO line rest wavelength SPECSYSZ= 'LSRK ' / Reference frame of spectral coordinates SSYSOBSZ= 'TOPOCENT' / Reference frame of observation VELOSYSZ= 0.0 / [m/s] Bary-topo velocity towards the source SSYSSRCZ= 'LSRK ' / Reference frame of source redshift ZSOURCEZ= 0.0000 / Redshift of the source COMMENT CRPIX2Z = 1 CDELT2Z = 1.0 CTYPE2Z = 'RA ' CRVAL2Z = 83.81042 / [deg] (05h35m14.5s) CUNIT2Z = 'deg ' COMMENT CRPIX3Z = 1 CDELT3Z = 1.0 CTYPE3Z = 'DEC ' CRVAL3Z = -5.375222 / [deg] (-05:22:30.8) CUNIT3Z = 'deg ' COMMENT RADESYSZ= 'FK5 ' / FK5 (IAU 1984) equatorial coordinates EQUINOXZ= 2000.0 / Equinox J2000.0 COMMENT CRPIX4Z = 1 CDELT4Z = 1.0 CTYPE4Z = 'STOKES ' CRVAL4Z = 1 / Stokes I (total intensity) COMMENT COMMENT ------------------------------------------------ Relativistic velocity COMMENT CRPIX1V = 32768.0 / Pixel coordinate of reference point CTYPE1V = 'VELO-F2V' / Relativistic velocity, non-linear axis CRVAL1V = 2.279141418E+7 / [m/s] Velocity of reference channel CDELT1V = 7.867122599E+2 / [m/s] Channel spacing CUNIT1V = 'm/s ' / Units of coordinate increment and value COMMENT RESTFRQV= 110201353000.0 / [Hz] 13CO line rest frequency RESTWAVV= 0.00272040633 / [m] 13CO line rest wavelength SPECSYSV= 'LSRK ' / Reference frame of spectral coordinates SSYSOBSV= 'TOPOCENT' / Reference frame of observation VELOSYSV= 0.0 / [m/s] Bary-topo velocity towards the source SSYSSRCV= 'LSRK ' / Reference frame of source redshift ZSOURCEV= 0.0000 / Redshift of the source COMMENT CRPIX2V = 1 CDELT2V = 1.0 CTYPE2V = 'RA ' CRVAL2V = 83.81042 / [deg] (05h35m14.5s) CUNIT2V = 'deg ' COMMENT CRPIX3V = 1 CDELT3V = 1.0 CTYPE3V = 'DEC ' CRVAL3V = -5.375222 / [deg] (-05:22:30.8) CUNIT3V = 'deg ' COMMENT RADESYSV= 'FK5 ' / FK5 (IAU 1984) equatorial coordinates EQUINOXV= 2000.0 / Equinox J2000.0 COMMENT CRPIX4V = 1 CDELT4V = 1.0 CTYPE4V = 'STOKES ' CRVAL4V = 1 / Stokes I (total intensity) COMMENT COMMENT ---------------------------------------------- Relativistic beta (v/c) COMMENT CRPIX1B = 32768.0 / Pixel coordinate of reference point CTYPE1B = 'BETA-F2V' / Relativistic beta (v/c), non-linear axis CRVAL1B = 7.602397448E-2 / [] Relativistic beta of reference channel CDELT1B = 2.624189632E-6 / [] Channel spacing COMMENT RESTFRQB= 110201353000.0 / [Hz] 13CO line rest frequency RESTWAVB= 0.00272040633 / [m] 13CO line rest wavelength SPECSYSB= 'LSRK ' / Reference frame of spectral coordinates SSYSOBSB= 'TOPOCENT' / Reference frame of observation VELOSYSB= 0.0 / [m/s] Bary-topo velocity towards the source SSYSSRCB= 'LSRK ' / Reference frame of source redshift ZSOURCEB= 0.0000 / Redshift of the source COMMENT CRPIX2B = 1 CDELT2B = 1.0 CTYPE2B = 'RA ' CRVAL2B = 83.81042 / [deg] (05h35m14.5s) CUNIT2B = 'deg ' COMMENT CRPIX3B = 1 CDELT3B = 1.0 CTYPE3B = 'DEC ' CRVAL3B = -5.375222 / [deg] (-05:22:30.8) CUNIT3B = 'deg ' COMMENT RADESYSB= 'FK5 ' / FK5 (IAU 1984) equatorial coordinates EQUINOXB= 2000.0 / Equinox J2000.0 COMMENT CRPIX4B = 1 CDELT4B = 1.0 CTYPE4B = 'STOKES ' CRVAL4B = 1 / Stokes I (total intensity) COMMENT HISTORY fimgcreate 1.0b at 2009-04-22T04:28:02 DATE = '2009-04-22T04:28:02' / file creation date (YYYY-MM-DDThh:mm:ss UT)