OII, 79 AGNe, 32 AGNb), 10 stars and 32 ‘unknown’ spectra that we’re unable to spectroscopically classify, regardless of enough options for a redshift to be decided. We acknowledge the presence of hybrid systems in our sample, however do not make any try to categorise such sources on this paper and defer this to a future paper. The catalogue of redshifts and spectroscopic classifications is available as supplementary materials in the net version of this paper. ∼similar-tosim∼ 1 may both point out SF or AGN, and without additional information spectroscopic classifications can’t be made.
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Lacy et al. (2004) imposed a MIR color choice to pick AGN of their pattern of SDSS sources in the primary Look Survey. A more stringent ‘diagonal boundary’ on the AGN selection could also be better for AGN choice, but this might additionally lose many AGN within the overlap region. We word that Lacy et al. OII) and 17 have been ‘unknown’. Our spectroscopic classifications show that there is a significant area of overlap between SF and AGN sources on this MIR colour-color plot. Indeed, nearly all of the ‘unknown’ spectroscopic classifications fall in this region of overlap.
2001) by Will Sutherland, MWC (his explanation https://www.pipihosa.com/2020/12/18/4395069-bah-humbug-beware-of-reits/) and relies on the Tonry & Davis (1979) cross-correlation technique. In the course of measuring the redshift, every spectrum was inspected visually to find out whether the dominant physical course of responsible for the radio emission was star-formation (SF) or an AGN. Spectra with a high quality flag of 2 or under were discarded. A total of 1120 ATLAS radio sources have been noticed, with spectra obtained for 466 sources yielding dependable redshifts from the AAOmega observations. 2 obtained for 160 sources. The code was additional developed by Will Saunders, Russell Cannon, Scott Croom and others for a variety of additional surveys undertaken with the AAOmega instrument at the AAT. 2 obtained for 306 sources.
We apply this discriminant. The IR colours and the MRC in this paper are primarily used to find out the validity of the spectroscopic classifications that we presented in Section 3.1. We hereby conclude that our spectroscopic classifications are broadly reliable. 0.6, it’s tough to assign a spectroscopic classification due to the dearth of strong optical features in the noticed spectroscopic range. The 32 sources that we were unable to categorise spectroscopically as SF or AGN couldn’t be unambiguously categorized using the mid-infrared diagnostics. For the remainder of this paper we’ll use the spectroscopic classifications only. Discover 16 of the 466 sources satisfy this AGN criterion.
Desk 2 gives the first ten lines of the catalogue. While this methodology seems to pick towards E kind sources extra robustly than the Lacy et al. 2004) technique beneath, the contamination by SF sources is considerable. OII) and 5 have been ‘unknown’. Determine three shows the redshift distribution of the 466 sources in ATLAS for which we obtained redshifts from AAOmega. Discover 127 sources can be classified as Type 1 AGN (Determine 5). We apply this selection to our information. 4. 0.1. We apply this choice to our knowledge. Discover 127 sources can be categorised as Kind 1 AGN (Figure 5). 1. We apply this selection to our knowledge.