astrolibR-package |
astrolibR: Astronomy Users Library |
adstring |
Return RA and Dec as character string(s) in sexigesimal format |
airtovac |
Convert air wavelengths to vacuum wavelengths |
aitoff |
Convert longitude, latitude to X,Y using an AITOFF projection |
altaz2hadec |
Convert horizon (Alt-Az) coordinates to hour angle and declination |
astrolibR |
astrolibR: Astronomy Users Library |
baryvel |
Calculates heliocentric and barycentric velocity components of Earth |
bprecess |
Precess celestial positions from J2000.0 (FK5) to B1950.0 (FK4) |
calz_unred |
Deredden a galaxy spectrum using the Calzetti et al. (2000) recipe |
ccm_unred |
Deredden a flux vector using the Cardelli et al. (1989) parameterization |
cirrange |
Force an angle into the range 0 <= ang < 360 |
cosmo_param |
Derive full set of cosmological density parameters from a partial set |
co_aberration |
Calculate changes to right ascension and declination due to astronomical aberration |
co_nutate |
Calculate changes in right ascension and declination due to nutation of the Earth's rotation |
co_refract |
Calculate correction to altitude due to atmospheric refraction |
co_refract_forward |
Calculate the true altitude of a celestial object from an observed altitude. |
ct2lst |
Convert from Local Civil Time to Local Mean Sidereal Time |
daycnv |
Convert Julian dates to Gregorian calendar dates |
deredd |
Deredden stellar Stromgren parameters given for a value of E(b-y) |
dtdz |
Integrand for cosmic age vs. redshift in standard cosmology |
eci2geo |
Convert Earth-centered inertial coordinates to geographic spherical coordinates |
eq2hor |
Convert celestial (ra-dec) coords to local horizon coords (alt-az) |
eqpole |
Convert Right Ascension and declination to X,Y using an equal-area polar projection |
euler |
Transform between Galactic, celestial, and ecliptic coordinates |
flux2mag |
Convert from flux (ergs/s/cm^2/A) to astronomical magnitudes |
fm_unred |
Deredden a flux vector using the Fitzpatrick (1999) parameterization |
galage |
Determine the age of a galaxy given its redshift and a formation redshift |
gal_uvw |
Calculate the Galactic space velocity (U,V,W) of a star |
gcirc |
Computes rigorous great circle arc distances between points on the celestial sphere |
geo2eci |
Convert geographic spherical coordinates to Earth-centered inertial coordinates |
geo2geodetic |
Convert from geographic/planetographic to geodetic coordinates |
geodetic2geo |
Convert from geodetic (or planetodetic) to geographic coordinates |
glactc |
Convert between celestial and Galactic (or Supergalactic) coordinates |
glactc_pm |
Convert between celestial and Galactic (or Supergalactic) proper motion and coordinates |
hadec2altaz |
Convert Hour Angle and Declination to Horizon (alt-az) coordinates |
helio |
Compute (low-precision) heliocentric coordinates for the planets |
helio_jd |
Convert geocentric (reduced) Julian date to heliocentric Julian date |
helio_rv |
Calculate the heliocentric radial velocity of a spectroscopic binary |
hor2eq |
Converts local horizon coordinates (alt-az) to equatorial coordinates(ra-dec) |
imf |
Compute an N-component power-law logarithmic stellar initial mass function |
intdiv |
Integer divide |
ismeuv |
Compute the continuum interstellar extreme ultraviolet (EUV) optical depth |
jdcnv |
Convert Gregorian dates to Julian days |
jprecess |
Precess celestial positions from B1950.0 (FK4) to J2000.0 (FK5) with proper motion |
juldate |
Convert from calendar to Reduced Julian Date |
ldist |
Integrand for luminosity distance calculation |
lsf_rotate |
Create a 1-d convolution kernel to broaden a spectrum from a rotating star |
lumdist |
Calculate luminosity distance (in Mpc) of an object given its redshift |
mag2flux |
Convert from astronomical magnitudes to flux (ergs/s/cm^2/A) |
month_cnv |
Convert between a month name and the equivalent number |
moonpos |
Compute the Right Ascension and Declination of the Moon at specified Julian date(s) |
mphase |
Calculate the illuminated fraction of the Moon at given Julian date(s) |
nutate |
Calculate the nutation in longitude and obliquity for a given Julian date |
planck |
Calculate the Planck function in units of ergs/cm2/s/A |
planet_coords |
Calculate low precision Right Ascension and declination for the planets given a date |
polyidl |
Calculate polynomial |
posang |
Compute position angle of source 2 relative to source 1 |
precess |
Precess coordinates from EQUINOX1 to EQUINOX2 |
precess_xyz |
Precess equatorial geocentric rectangular coordinates |
premat |
Return the precession matrix needed to go from EQUINOX1 to EQUINOX2 |
radec |
Convert Right Ascension and declination from decimal to sexigesimal units |
rhotheta |
Calculate the separation and position angle of a binary star |
sixty |
Convert a decimal number to sexigesimal |
sphdist |
Distance on a sphere |
sunpos |
Compute the Right Ascension and Declination of the Sun at specified Julian date(s) |
ten |
Convert a sexigesimal number or string to decimal |
uvbybeta |
Derive dereddened colors, metallicity, and Teff from Stromgren colors |
vactoair |
Convert vacuum wavelengths to air wavelengths |
xyz |
Calculate geocentric X,Y, and Z and velocity coordinates of the Sun |
ydn2md |
Convert from year and day number of year to month and day of month |
ymd2dn |
Convert from year, month, day to day number of year |
zang |
Determine the angular size of an object as a function of redshift |