NAME Sgr A*

Query : NAME Sgr A*

Basic data :
NAME Sgr A* -- X-ray Source
Origin of the objects types :

(Ref) Object type as listed in the reference "Ref"
(acronym) Object type linked to the acronym according to the original reference
() Anterior to 2007, before we can link the objet type to a reference, or given by the CDS team in some particular cases

Other object types: otypes_help 		gam (), X (AX,CXOGC,...), Rad (2014ApJ)
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1''; as well as Tycho2, UCAC4, and Gaia DR2/3 without proper motions
    • B : 0.01-0.1''; as well as Tycho2 and UCAC4 with proper motions
    • A : Hipparcos and Gaia DR2/3 with proper motions; sometimes VLBI
  • bibcode : bibcode of the coordinates reference
ICRS coord. (ep=J2000) : 		17 45 40.03599 -29 00 28.1699 (Radio) [ 2.65 1.42 0 ] B 2011AJ....142...35P
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1''; as well as Tycho2, UCAC4, and Gaia DR2/3 without proper motions
    • B : 0.01-0.1''; as well as Tycho2 and UCAC4 with proper motions
    • A : Hipparcos and Gaia DR2/3 with proper motions; sometimes VLBI
  • bibcode : bibcode of the coordinates reference
FK4 coord. (ep=B1950 eq=1950) : 		17 42 29.30683 -28 59 18.5584 [ 2.65 1.42 0 ]
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1''; as well as Tycho2, UCAC4, and Gaia DR2/3 without proper motions
    • B : 0.01-0.1''; as well as Tycho2 and UCAC4 with proper motions
    • A : Hipparcos and Gaia DR2/3 with proper motions; sometimes VLBI
  • bibcode : bibcode of the coordinates reference
Gal coord. (ep=J2000) : 		359.94423568 -00.04616002 [ 2.65 1.42 0 ]
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Some important notes on this object about identifications and objects associations.
notes:

Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (14) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

AX J1745.6-2900 NAME SgrA*/IR NAME Sgr A [BGM2005] J174540.08-290028.48
CXOGC J174540.0-290027 NAME Sgr A*/L' NAME Sagittarius A [SKM2002] 28
NAME Sagittarius A* NAME Sgr A* IR SWIFT J1746.3-2850A
NAME Sgr A* NAME Sgr A * [BGM2005] J174540.14-290028.40

References (4946 between 1850 and 2026) (Total 4946)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Observing logs

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : NAME Sgr A*

Search by coordinates in Vizier (radius: 5 arcsec)

Annotations :
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Please, have a look at Best practices. The list of all annotations to SIMBAD objects can be found here .

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