H 1820-303

Object query : H 1820-303 C.D.S. - SIMBAD4 rel 1.223 - 2014.12.22CET18:42:54

Available data : Basic data  •  Identifiers  •  Plot & images  •  Bibliography  •  Measurements  •  External archives  •  Notes  •  Annotations


Basic data :
X Sgr X-4 -- Low Mass X-ray Binary
Other object types: N*? () , GlC () , X (X,3A,1ES,1H,H,1M,MXB,PBC,1RXS,2S,SWIFT,2U,3U,4U,XB,[BM83],[KRL2007b],[RTB2002]) , gam (INTEGRAL1,INTREF) , LXB ([ZGV2011]) , *iC (Cl*) , Rad ([KGB96])
ICRS coord. (ep=J2000) : 18 23 40.57 -30 21 40.6 ( X-ray ) [ ~ ~ ~ ] C 2011A&A...533A..33Z
FK5 coord. (ep=J2000 eq=2000) : 18 23 40.57 -30 21 40.6 ( X-ray ) [ ~ ~ ~ ] C 2011A&A...533A..33Z
FK4 coord. (ep=B1950 eq=1950) : 18 20 27.80 -30 23 17.0 ( X-ray ) [ ~ ~ ~ ] C 2011A&A...533A..33Z
Gal coord. (ep=J2000) : 002.7882 -07.9138 ( X-ray ) [ ~ ~ ~ ] C 2011A&A...533A..33Z
Fluxes (2) :
B 19.06 [~] D ~
V 18.81 [~] D ~
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within radius arcsec The VizieR photometry tool allows for easy visualization of photometry points extracted around the Simbad position from photometry-enabled catalogues in VizieR.
The search radius has to be specified by the user. It is currently limited to a maximum of 30 arcsec. It depends mostly on the precision or quality of the coordinates (SIMBAD and VizieR catalogs), the resolution of the images from which the sources were extracted, source extent, and source crowding.
Suggestions are: crowded field: 0.5 to 1.5 arcsec, 3 arcsec otherwise; uncertain coordinates (SIMBAD quality E or coordinates without reference): 5 to 30 arsec (risky!).

essential notes:


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

: 1 Display criteria :

Identifiers (28) :

X Sgr X-4 H 1820-303 2S 1820-303 XB 1820-303
3A 1820-303 INTEGRAL1 89 SWIFT J1823.6-3021 XB 1820-30
Cl* NGC 6624 SK 1210 INTREF 902 SWIFT J1823.7-3023 [BM83] X1820-303
Cl* NGC 6624 DMA A 1M 1820-303 2U 1820-30 [KGB96] NGC 6624 1
1ES 1820-30.3 MXB 1820-30 3U 1820-30 [KRL2007b] 316
1H 1820-303 PBC J1823.6-3021 4U 1820-30 [RTB2002] J182340.46-302140.3
H 1817-30 1RXS J182340.5-302137 4U 1820-303 [ZGV2011] 12

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References (765 between 1850 and 2015)
Simbad bibliographic survey began in 1950 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

from: to:

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Measurements (3 types) :


distance : 1    Einstein : 1    XMM : 1   

   


External archives :

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

Data at NED - NASA/IPAC Extragalactic Database

Catalogue information from VizieR :

Generic search by coordinates (radius: 5 arcsec)

1RXS J182340.5-302137

Annotations :
Annotations allow a user to add a note or report an error concerning the astronomical object and its data. It requires registration to post a note. See description .
The list of all annotations to SIMBAD objects can be found here .

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2014.12.22-18:42:54

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