2001A&A...371...37R

Query : 2001A&A...371...37R

2001A&A...371...37R - Astronomy and Astrophysics, volume 37137-44 (2001/5-3)

A new population of soft X-ray weak quasars.

RISALITI G., MARCONI A., MAIOLINO R., SALVATI M. and SEVERGNINI P.

Abstract (from CDS):

Quasars selected in optical surveys by means of their blue or UV excess are known to be strong emitters in the X-rays, except for Broad Absorption Line (BAL) objects. In this paper we study the X-ray emission of quasars selected through their emission line spectrum rather than their blue excess. X-ray data are obtained by cross-correlating two optical samples (the Hamburg Survey Catalogue and the Palomar Transit Catalogue) with the WGA catalogue of ROSAT observations. We find that a significant fraction of objects are strongly underluminous in the X-rays. We discuss the physical nature of these sources and we propose an interpretation for their optical and X-ray properties based on a dust-poor and gas-rich absorber. Our results suggest the existence of a population of AGNs having a type 1 optical spectrum and a type 2 X-ray emission.

Abstract Copyright: ∼

Journal keyword(s): galaxies: active - galaxies: X-rays: galaxies

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 IRAS 05189-2524 Sy2 05 21 01.3994605776 -25 21 45.321827832   15.47 14.75     ~ 545 0

Query : 2001A&A...371...37R

Basic data :
IRAS 05189-2524 -- Seyfert 2 Galaxy
Other object types: otypes_help 		AGN (2019MNRAS,[HB91],...), G (2016A&A,LEDA,...), X (PBC,SWIFT,...), MIR (AKARI,WISEA,...), IR (IRAS,PSCz,...), Sy2 (2013ApJS), Sy1 (2010A&A), * (Gaia), gam (INTREF), Rad (NVSS), NIR (2MASS), Opt (PSO)
ICRS coord. (ep=J2000) : 		05 21 01.3994605776 -25 21 45.321827832 (Optical) [ 0.2409 0.2947 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		05 18 58.8925262186 -25 24 39.627524737 [ 0.2409 0.2947 90 ]
Gal coord. (ep=J2000) : 		227.8890305155595 -30.2927668493282 [ 0.2409 0.2947 90 ]
Proper motions mas/yr : 		-0.592 3.554 [0.335 0.381 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) 12011 [150] / z(emission) 0.04089978 [0.0005] / cz 12261.4456 [150]
   (Opt) C 2022ApJS..261....2K
Angular size (arcmin): 		0.42904 0.411321 127 (Opt) B 2023ApJS..269....3M
Fluxes (10) :
B 15.47 [~] D 2010A&A...518A..10V
V 14.75 [~] D 2010A&A...518A..10V
G 17.676523 [0.010744] C 2020yCat.1350....0G
J 12.449 [0.035] C 2006AJ....131.1163S
H 11.472 [0.032] C 2006AJ....131.1163S
K 10.376 [0.022] C 2006AJ....131.1163S
g (AB) 16.1655 [0.0039] B 2017yCat.2349....0C
r (AB) 15.5123 [0.0155] C 2017yCat.2349....0C
i (AB) 15.2909 [0.0065] B 2017yCat.2349....0C
z (AB) 14.9620 [0.0205] C 2017yCat.2349....0C
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Identifiers (29) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

LEDA 17155 2MASX J05210136-2521450 WISEA J052101.39-252145.2 [VV2006c] J052101.4-252145
AKARI -FIS-V2 J0521013-252146 NVSS J052101-252145 WISE J052101.39-252145.2 [VV2010c] J052101.4-252145
AKARI-IRC-V1 J0521013-252145 PBC J0520.8-2522 2XMM J052101.4-252144 [VV98c] J052101.4-252145
6dFGS gJ052101.5-252146 PSCz Q05189-2524 [HB91] 0518-254 Gaia DR2 2957793279241258496
INTREF 244 PSO J080.2558-25.3625 [HSN2016] J080.25-25.36 Gaia DR3 2957793279241779328
IRAS 05189-2524 QDOT B0518586-252439 [VFT93] 0518-2524
IRAS F05189-2524 SWIFT J0521.0-2522 [VV2000c] J052101.4-252145
2MASS J05210139-2521452 SWIFT J0521.2-2523 [VV2003c] J052101.4-252145

References (545 between 1850 and 2026) (Total 545)
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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Collections of Measurements Description of Measurements

Velocities : 11    Distance : 1    PM : 1   

   

Observing logs
Herschel : 17    ISO : 18    XMM : 1   

   

External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : IRAS 05189-2524

Link by name to the catalogue in VizieR :

AKARI-IRC-V1 J0521013-252145 IRAS 05189-2524 IRAS F05189-2524 2MASS J05210139-2521452 2MASX J05210136-2521450
NVSS J052101-252145 WISEA J052101.39-252145.2 WISE J052101.39-252145.2 Gaia DR2 2957793279241258496 Gaia DR3 2957793279241779328

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