ADSTRING | Format RA and DEC as a character string |
AIRTOVAC | Convert air wavelengths to vacuum wavelengths |
AITOFF | Convert longitude,latitude to X,Y using Aitoff equal-area projection |
AITOFF_GRID | Create an overlay grid using the AITOFF projection |
ALTAZ2HADEC | Convert Horizon (Alt-Az) coordinates to Hour Angle and Declination |
ARCBAR | Draw an arcbar over an image showing the astronomical plate scale |
ARROWS | Given a FITS header, display a "weathervane" showing N-E orientation |
ASTDISP | Display formatter for pixel + astronomical coordinates |
ASTRO | Interactive driver to compute astronomical precession, or coordinate conversions (calls EULER and PRECESS). |
BARYVEL | Compute components of barycentric Earth velocity, given Julian date |
BPRECESS | Precess coordinates, proper motion from J2000 to B1950 |
CALZ_UNRED | Deredden a galaxy spectrum using the Calzetti et al. (2000) formula |
CCM_UNRED | Deredden a spectrum using the Cardelli, Clayton and Mathis (1989) parameterization. |
CO_ABERRATION | Calculate changes to Ra and Dec due to aberration effects |
CO_NUTATE | Calculate changes in RA and Dec due to nutation of the Earth's rotation |
CO_REFRACT | Calculate correction to altitude due to atmospheric refraction |
COSMO_PARAM | Derive a full set of cosmological parameters given a subset |
CT2LST | Convert from civil time to local sidereal time |
DATE | Convert day of year to a DY-MON-CCYY string (FITS standard) |
DATE_CONV | Function to perform various date format conversions |
DAYCNV | Convert from Julian Date to calendar date. |
DEREDD | Deredden Stromgren indices (called by UVBYBETA) |
ECI2GEO | Convert Earth-centered inertial coordinates to geographic coords |
EQ2HOR | Convert celestial (ra-dec) coords to local horizon coords (alt-az). |
EQPOLE | Convert longitude,latitude to X,Y using polar equal-area projection |
EQPOLE_GRID | Create overlay grid using polar equal-area projection |
EULER | Astronomical coordinate system conversions |
FLUX2MAG | Convert from flux units to magnitudes |
FM_UNRED | Deredden a spectrum using the Fitzpatrick & Massa (1998) parameterization. |
GAL_UVW | Calculate the Galactic space velocity (U,V,W) of a star |
GAL_FLAT | Correct a galaxy image for inclination effects. |
GALAGE | Derive a galaxy age as a function of redshift for a cosmological model |
GCIRC | Compute rigorous great circle distance |
GEO2ECI | Convert geographic coordinates to Earth-centered inertial coords |
GEO2GEODETIC | Convert from geographic to geodetic coordinates |
GEO2MAG | Convert from geographic to geomagnetic coordinates |
GEODETIC2GEO | Convert from geodetic to geographic coordinates |
GET_COORDS | Read in angular input in decimal or sexigesimal format |
GET_DATE | Get the current date in CCYY-MM-DD format (FITS standard) |
GET_JULDATE | Get the current Julian date as a double precision scalar |
GLACTC | Convert between Galactic (or SuperGalactic) and equatorial coordinates |
GLACTC_PM | Convert between celestial and Galactic (or Supergalactic) proper motion |
HADEC2ALTAZ | Converts Hour Angle and Declination to Horizon (alt-az) coordinates |
HELIO | Compute (low-precision) heliocentric coordinates of the planets |
HELIO_JD | Convert geocentric (reduced) Julian date to heliocentric Julian date |
HELIO_RV | Compute radial velocity given binary star orbit parameters |
HOR2EQ | Convert local horizon coords (alt-az) to equatorial (ra-dec). |
IMCONTOUR | Contour plots with astronomical labeling (either RA,Dec or arc distance from the image center |
IMF | Return values for a multi-component power law initial mass function |
ISMEUV | Compute EUV optical depth due to photoionization of HI, HeI and HeII |
JDCNV | Convert from calendar date to Julian date. |
JPRECESS | Precess positions & proper motions from B1950 to J2000 |
JULDATE | Convert from calendar date to reduced Julian date. |
LSF_ROTATE | Create a 1-d convolution kernel to broaden a spectrum from a rotating star |
LUMDIST | Return luminosity distance for a given redshift & cosmological model |
MAG2GEO | Convert from geomagnetic to geographic coordinates |
MAG2FLUX | Convert from magnitudes to flux units |
MONTH_CNV | Convert a month name to the equivalent number or vice-versa |
MOONPOS | Compute the RA and Dec (and distance) of the Moon at a given date |
MPHASE | Compute illuminated fraction of the Moon's disk for given Julian dates |
NUTATE | Compute the nutation in longitude and latitude for given Julian date(s) |
OBSERVATORY | Return coordinates, altitude & time zones of an observatory |
PLANCK | Returns a blackbody flux for a given effective temperature |
PLANET_COORDS | Return low-precision RA and Dec of planets give a date(s) |
POSANG | Compute the position angle between sources of specified RA and Dec |
PRECESS | Precess RA and Dec to a new equinox |
PRECESS_CD | Precess the PC (or CD) matrix in a FITS header to a new equinox |
PRECESS_XYZ | Precess equatorial geocentric rectangular coordinates |
PREMAT | Returns precession matrix from equinox 1 to equinox 2 |
QDCB_GRID | Create overlay grid using COBE quad cube database coordinates |
RADEC | Format RA, Dec as Hours,Min,Sec,Deg,Min,Sec |
SIXTY | Convert decimal number to sexigesimal |
SUNPOS | Compute the RA and Dec of the Sun at a given date |
TEN | Convert sexigesimal number to decimal |
TENV | Like TEN but will work on a vector of sexigesimal numbers. |
TICPOS | Specify distance between tic marks for astronomical coordinates |
TICLABELS | Create labels for astronomical coordinate tick marks |
TICS | Compute the optimum distance between tic marks for astronomical labeling |
TIC_ONE | Determine optimum position of the first tic in astronomical labeling |
UVBYBETA | Use Stromgren indices to derive dereddened colors, metallicity, and effective Temperature. |
VACTOAIR | Convert vacuum wavelengths to air wavelengths. |
XYZ | Compute heliocentric rectangular coordinates at given Julian date. |
YMD2DN | Convert year,month,day to day number of the year (in /jhuapl) |
YDN2MD | Convert day number of the year to year, month,day |
ZANG | Compute angular size as a function of redshift in a Friedman cosmology |
ZENPOS | Compute the RA and Dec of the local zenith at a given date |