Browse
this table...

SBORBITCAT - Spectroscopic Binary Orbits Ninth Catalog (Dynamic Version)

HEASARC
Archive

Overview

The Ninth Catalog of Spectroscopic Binary Orbits (SB9) continues the series of compilations of spectroscopic orbits carried out over the past 35 years by Batten and collaborators, e.g., the 8th SBO Catalog (SB8, CDS Catalog V/64) of Batten, Fletcher and MacCarthy 1989, Publ. DAO, 17, 1. This catalog is regularly updated. This version of SB9 contains orbits for over three thousand binary systems; notice that the numbers of orbits and binary systems included in this version differ from those in the reference publication, as the latter reflected the 2004 May 1 status of the catalog, when it had 2694 orbits for 2386 binary systems. There is an online version of this catalog, maintained by the authors, which is continuously updated, at http://sb9.astro.ulb.ac.be/.

Catalog Bibcode

2004A&A...424..727P

Bulletin

The SBORBITCAT database table was last updated on 27 March 2014.

References

The Ninth Catalogue of Spectroscopic Binary Orbits
     Pourbaix D., Tokovinin A.A, Batten A.H., Fekel F.C., Hartkopf W.I.,
     Levato H., Morell N.I., Torres G., Udry S.
    <Astron. Astrophys. 424, 727 (2004)>
    =2004A&A...424..727P

Provenance

This table was created by the HEASARC based on the CDS Catalog B/sb9, using the files main.dat, alias.dat, orbits.dat and notes.txt. The CDS updates it regularly, and this HEASARC version is accordingly updated within a week of such updates.

HEASARC Implementation

In this HEASARC incarnation of SB9, each row in the table corresponds to a unique spectroscopic binary orbit. Since some binary systems have more than one orbit published, and some systems are in triple or higher multiplicity systems, there are more orbits and hence rows in this table than systems. Also notice that the orbital parameters can vary considerably in their accuracy and that they are all displayed in this table to a high precision, e.g., eccentricity to 9 decimal places, even though the accuracy for many or most measurements is much lower. The user should always examine the associated error parameter (e.g., eccentricity_error in the above case) to determine the actual uncertainty in the measurement.

Parameters

System_Number
The SB9 system number [1-3004]: this is identical to the SB8 number for values less than or equal to 1469.

B1900_Name
The name of the system, based on the B1900 position (for backward compatibility with SB8) truncated to 0.1 minutes of time in RA and arcminutes in declination, e.g., '00198-5136'.

RA
The Right Ascension of the system in the selected equinox. This was given in J2000 coordinates to a precision of 0.01 seconds of time in the original version.

Dec
The Declination of the system in the selected equinox. This was given in J2000 coordinates to a precision of 0.1 arcseconds in the original version.

LII
The Galactic Longitude of the system.

BII
The Galactic Latitude of the system

Component
The component identifier, used for higher multiplicity systems.

App_Mag_1
The apparent magnitude of component 1, in the filter band specified by the app_mag_1_band parameter.

App_Mag_1_Band
The filter band in which the component 1 magnitude is given: P, B, V, R, y, r, I, or K.

App_Mag_2
The apparent magnitude of component 2, in the filter band specified by the app_mag_2_band parameter.

App_Mag_2_Band
The filter band in which the component 2 magnitude is given: P, B, V, R, y, r, I, or K.

Spect_Type_1
The MK spectral type of component 1.

Spect_Type_2
The MK spectral type of component 2.

Name
The name of the system, using the Hipparcos Catalog (HIP) identification when one exists, or another identifier such as variable star name, BD name, ec., otherwise.

Alt_Names
Other designations for the system, given in the form of a comma-delimited list.

Orbit_Number
The orbit number for the selected binary system.

Period
The orbital period for the selected binary system, in days.

Period_Type
This parameter is a flag which is set to 'a' if the quoted value for the period was assumed, i.e., fixed at the given value rather than computed.

Period_Error
The mean error in the orbital period of the system, in days.

Reference_Time
The epoch for the computation of phases, usually the time of a periastron passage (if the parameter periastron_time_flag is 0), in JD.

Reference_Time_Type
This parameter is a flag which is set to 'a' if the quoted value for the reference_time parameter was assumed, i.e., fixed at the given value rather than computed.

Reference_Time_Error
The mean error in the reference_time parameter, in days.

Reference_Time_Flag
This parameter is set to 0 if the reference epoch corresponds to the time of periastron passage, and is > 0 to indicate that it corresponds to the time of other phenomena, e.g., an eclipse.

Eccentricity
The orbital eccentricity of the spectroscopic binary orbit.

Eccentricity_Type
This parameter is a flag which is set to 'a' if the quoted value for the eccentricity was assumed, i.e., fixed at the given value rather than computed, or to '>' to indicate that the error is large (larger than the value itself).

Eccentricity_Error
The mean error in the orbital eccentricity.

Omega
The longitude of the orbital periastron, Omega, in degrees.

Omega_Type
This parameter is a flag which is set to 'a' if the quoted value for the longitude of periastron was assumed, i.e., fixed at the given value rather than computed.

Omega_Error
The mean error in Omega, in degrees.

Semi_Amplitude_1
The velocity semi-amplitude of the primary star, K1, in km/s.

Semi_Amplitude_1_Flag
This parameter is a flag which is set to ':' if the quoted value for the velocity semi-amplitude of the primary was considered to be uncertain.

Semi_Amplitude_1_Type
This parameter is a flag which is set to 'a' if the quoted value for the velocity semi-amplitude of the primary was assumed, i.e., fixed at the given value rather than computed, or to '>' to indicate that the error is large (larger than the value itself).

Semi_Amplitude_1_Error
The mean error in the velocity semi-amplitude of the primary, in km/s.

Semi_Amplitude_2
The velocity semi-amplitude of the secondary star, K2, in km/s.

Semi_Amplitude_2_Flag
This parameter is a flag which is set to ':' if the quoted value for the velocity semi-amplitude of the secondary was considered to be uncertain.

Semi_Amplitude_2_Type
This parameter is a flag which is set to 'a' if the quoted value for the velocity semi-amplitude of the secondary was assumed, i.e., fixed at the given value rather than computed.

Semi_Amplitude_2_Error
The mean error in the velocity semi-amplitude of the secondary, in km/s.

System_Velocity
The systemic radial velocity, V0, in km/s.

System_Velocity_Flag
This parameter is a flag which is set to ':' if the quoted value for the system velocity was considered to be uncertain.

System_Velocity_Type
This parameter is a flag which is set to 'a' if the quoted value for the radial velocity of the system V0 was assumed, i.e., fixed at the given value rather than computed.

System_Velocity_Error
The mean error in the systemic radial velocity, in km/s.

Radial_Velocity_1_RMS
The RMS residuals of the radial velocity of the primary star, in km/s.

Radial_Velocity_2_RMS
The RMS residuals of the radial velocity of the secondary star, in km/s.

Radial_Velocity_1_Obs
The number of observations of the radial velocity of the primary star.

Radial_Velocity_2_Obs
The number of observations of the radial velocity of the secondary star.

Orbit_Grade
The assessed grade or quality of the orbital solution, ranging from 0 (`Poor') to 5 (`Definitive').

Ref_Orbit
The reference code, usually the ADS bibcode, of the publication in which the orbit was presented.

Contributor
The contributor of the orbital solution. This can be either an institution, e.g., DAO or CfA, or the name of an author or co-author, e.g., TORRES.

Orbit_Note
A note concerning the details of the orbit determination, or other comments about the system. In two cases (the entries for system_number = 306, orbit_number = 1 and for system_number = 2126, orbit_number = 1), the notes were so verbose that they have been truncated; the full notes are available at ftp://cdsarc.u-strasbg.fr/pub/cats/B/sb9/notes.txt.

Class
The HEASARC Browse object classification, based on the spectral type of the primary star in the binary system.


Contact Person

Questions regarding the SBORBITCAT database table can be addressed to the HEASARC User Hotline.

Page Author: Browse Software Development Team
Last Modified: 20-Aug-2012