Data-related "Keywords: definitions

Groups

	Keywords	Definitions

Identifiers, location, and basic properties:
	hd		HD number
	hip		HIPparcos Catalog Number
	onamealf	Other NAME
	ra		Right Ascension, from SIMBAD.
	dec		Declination, from SIMBAD.
	vmag		V magnitude, from SIMBAD.
	sptalf		SPectral Type in "ALF" (alphanumeric) format (i.e. OBAFGKM).
	sptn		SPectral Type Number -- a numeric representation of Spectral Type.
	kmag		Estimated K magnitude, calculated from SIMBAD's V magnitude by spectral type.
	abvmag		ABsolute V magnitude of the Spectral Type (if available).
	abkmag		ABsolute K magnitude of the Spectral Type (not yet available).

Orbital Elements:
	pdays		Period, in DAYS.
	pdayserr	  Error given in paper for Period.
	tofp		Time OF Periastron.
	tofperr   	  Error given for Time of Periastron.
	ecc		ECCentricity, "e".
	eccerr		  Error given for eccentricity.
	omega		\omega.
	omegaerr	  Error given for \omega.
	k1		K1, km/sec.
	k1err		  Error given for K1.
	k2		K2, km/sec.
	k2err		  Error given for K2.
	gamma		\gamma, degrees.
	gammaerr	  Error given for \gamma.

More properties from SIMBAD, useful for selecting for interferometric observations:
	pihip		Parallax "PI" from Hipparcos (mas).
	pihiperr	  Error of Hipparcos parallax.
	piest		Spectroscopic ESTimate of pi, based on Absolute Magnitude and V magnitude.
	pibest		"pihip" if given by Hipparcos, otherswise "piest".
	mualf		Proper motion vector component "\mu_alpha".
	mubet		Proper motion vector component "\mu_beta".

Calculated quantities from orbital elements.
	a1sini		a_1 sin(i) (AU)
	a2sini		a_2 sin(i) (AU)
	asini		(a_1 + a_2) sin(i) (AU)
	fm		f(m)
	m1sin3i		m_1 sin^3(i)
	m2sin3i		m_2 sin^3(i)
	aarcsec		"asini" in mas.
	sb1sep		Estimate of separation (mas) for SB1s (see paper).
	aatneg		Separation (mas) for SB2s when true anomaly equals -(\omega).
	aat180		Separation (mas) for SB2s when true anomaly equals (180 -\omega).
	gns		Greater Nodal Separation, or the larger of "aatneg" and "aat180".

Two columns reserved for coments
	comalf		Comments (Space for alpha-numeric comments)
	blank01		Comments (Space for version number)

Reference of the paper with the Spectroscopic Binary Orbital Element.
	refalf		REFerence.




Status of records (28Apr2003):

Record-Type (RecType) identifies each record as being integer (i), real (f),
a string with no white space or "word" (w), or a string (s).

Currently (28Apr2003) the "no-value-entered" character is "~", in keeping with
records returned by SIMBAD, however, this may be changed to "?" for CDS.

	Keyword		RecType	Source			Current status

	hd		i	Paper or SIMBAD		Some zeroes left from Excel to be replaced.
	hip		i	Paper or SIMBAD		Some zeroes left from Excel to be replaced.
	onamealf	s	Paper
	ra		f	Paper or SIMBAD		
	dec		f	Paper or SIMBAD		
	vmag		f	Paper or SIMBAD		
	sptalf		w(s)	Paper or SIMBAD		("Should" be free of spaces)
	sptn		f(i)	In format uv.abc but may change to uvabc (see note below)
	kmag		f	Calculated here.	
	abvmag		f	Calculated here.	
	abkmag		f	Would be calculated	Space left to insert this but not currently planning putting this in.
	pdays		f	Paper
	pdayserr	f	Paper
	tofp		f	Paper
	tofperr   	f	Paper
	ecc		f	Paper
	eccerr		f	Paper
	omega		f	Paper
	omegaerr	f	Paper
	k1		f	Paper
	k1err		f	Paper
	k2		f	Paper
	k2err		f	Paper
	gamma		f	Paper
	gammaerr	f	Paper
	pihip		f	SIMBAD
	pihiperr	f	SIMBAD
	piest		f	Calculated here.	See note below.
	pibest		f	Chosen here.		
	mualf		f	SIMBAD
	mubet		f	SIMBAD
	a1sini		f	Calculated here.
	a2sini		f	Calculated here.
	asini		f	Calculated here.
	fm		f	Calculated here.
	m1sin3i		f	Calculated here.
	m2sin3i		f	Calculated here.
	aarcsec		f	Calculated here.
	sb1sep		f	Calculated here.
	aatneg		f	Calculated here.
	aat180		f	Calculated here.
	gns		f	Calculated here.
	comalf		s	Bookkeeping.
	blank01		f	Bookkeeping.
	refalf		s(w)	ADS or Batten's 8th Catalog

Longer notes:
sptn: It is often easier to write software to read numbers than character 
      strings, hence the spectral type is given in the format uv.abc where
        the digit v before dot is 1-7 for OBAFGKM,
          (the digit u is non-zero for unusual designations),  
        the digit a after dot is 1-9 for Spectral Subtype 0-9, and
          (the digit b is non-zero for missing an LC),
        the digit c after dot is 1-5 for LC I,II,III,IV, and V.
        (For unusual spectral types, use xx or xx.y)
      Using an integer code is sometimes more efficient, so sptn may be put
        in the format uvac (where having c>5 replaces b).

piest:  Done for Spectral Types and Luminosity classes with absolute 
	magnitudes available.  Most of those currently (28Apr2003) calculated 
	that also have Hipparocos values correspond well with the Hipparcos 
	parallaxes, but enought do not that this calculation needs another 
	review.