An all-sky set of $\vec (B)-V-R$ photometric calibrators for Schmidt surveys

Bucciarelli, B.; Yus, Jorge Garcia; Casalegno, R.; Postman, Marc; Lasker, B. M.; Sturch, C. R.; Lattanzi, M. G.; McLean, B.; Costa, E.; Falasca, A.; Poole, R. Le; Massone, G.; Potter, Michael; Rosenberg, Alfred; Borgman, T.; Doggett, J. B.; Morrison, J.; Pizzuti, Andrea; Pompei, E.; Rehner, D.; Siciliano, L.; Wolfe, David

doi:10.1051/0004-6361:20000440

Cited by 34 publications

(36 citation statements)

References 17 publications

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“…It should be noted that in the absence of blue-passband observations it was not possible to use (as is the common practice) the (B − V) color for the standardization of the v magnitude. As shown previously by Bucciarelli et al (2001), the (B − V) and (V − R) colors of the Landolt stars are linearly related and comparable in range, so the use of the (V − R) color in the (v, V) equation is equally satisfactory.…”

Section: Reductionssupporting

confidence: 60%

“…This was done by means of the IRAF INVERTFIT task, which produces a set of calibrated magnitudes and colors and their errors: in the present case specifically: V, error (V), (V −R), error (V −R) and (V − I), error (V − I). As pointed out by Bucciarelli et al (2001), the final photometric error computed by INVERTFIT does not rigorously treat error propagation, therefore producing a lower limit of the photometric errors.…”

Section: Reductionsmentioning

confidence: 99%

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Photometric parallaxes of Southern high proper motion stars. I.

Costa

Méndez

2003

A&A

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Abstract. Photometric distances derived from VRI photometry are given for 44 high proper motion stars from the Cerro El Roble proper motion surveys of Wroblewski & Torres and Wroblewski & Costa. The observations were carried out with the main purpose of estimating the distance of selected members of the above survey that are likely to be nearby. We have discovered 13 stars closer than 25 pc, the classical limit of the Catalogs of Nearby Stars (see e.g. Gliese & Jahreiβ 1991) and the NASA/NSF NStars Project. Those stars of the sample whose photometric distances are less than ∼25 pc, or have proper motions in excess of 0.50 arcsec/year, are either currently being targeted by the Cerro Tololo Parallax Investigation (CTIOPI) or will be targets of a forthcoming expansion of this survey.

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Section: Reductionssupporting

confidence: 60%

Section: Reductionsmentioning

confidence: 99%

Photometric parallaxes of Southern high proper motion stars. I.

Costa

Méndez

2003

A&A

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“…We therefore launched a campaign to obtain our own deeper photometric CCD sequences in as many fields as possible; the results of this campaign will soon be made public (Schulze et al, in preparation). Augmenting these sequences by incorporating also the guide star photometric catalog II (GSPC-II; Bucciarelli et al 2001), we arrived at a satisfactory photometric calibration of all 380 HES fields.…”

Section: Photometrymentioning

confidence: 99%

Low redshift AGN in the Hamburg/ESO survey

Schulze¹,

Wisotzki²

2009

A&A

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We present a determination of the local (z ≈ 0) luminosity function of optically selected type 1 (broad-line) active galactic nuclei. Our primary resource is the Hamburg/ESO survey (HES), which provides a well-defined sample of more than 300 optically bright AGN with redshifts z < 0.3 and blue magnitudes B < ∼ 17.5. AGN luminosities were estimated in two ways, always taking care to minimise photometric biases due to host galaxy light contamination. Firstly, we measured broad-band B J (blue) magnitudes of the objects over small apertures of the size of the seeing disk. Secondly, we extracted Hα and Hβ broad emission line luminosities from the spectra which should be entirely free of any starlight contribution. Within the luminosity range covered by the HES (−19 > ∼ M B J > ∼ −26), the two measures are tightly correlated. The resulting AGN luminosity function (AGNLF) is consistent with a single power law, also when considering the effects of number density evolution within the narrow redshift range. We compared our AGNLF with the Hα luminosity function of lower luminosity Seyfert 1 galaxies by Hao et al. (2005a, AJ, 129, 1795 and found a smooth transition between both, with excellent agreement in the overlapping region. From the combination of HES and SDSS samples we constructed a single local AGNLF spanning more than 4 orders of magnitude in luminosity. It shows only mild curvature which can be well described as a double power law with slope indices of −2.0 for the faint end and −2.8 for the bright end. We predicted the local AGNLF in the soft X-ray domain and compared this to recent literature data. The quality of the match depends strongly on the adopted translation of optical to X-ray luminosities and is best for an approximately constant optical/X-ray ratio. We also compared the local AGNLF with results obtained at higher redshifts and find strong evidence for luminosity-dependent evolution, in the sense that AGN with luminosities around M B −19 are as common in the local universe as they were at z = 1.5. This supports the "AGN downsizing" picture first found from X-ray selected AGN samples.

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“…The photographic magnitudes given in the GSC2.2 are in the natural systems of the photographic plates (emulsion/filter: IIIaF+OG590, IIIaJ+GG395, IIaD+W12). The photometric calibration is based on a Chebyshev polynomial fit to sequence stars from the Second Guide Star Photometric Catalogue (Bucciarelli et al 2001) and the Tycho Catalog for the bright end. However the three magnitudes are not always present together.…”

Section: Data Overviewmentioning

confidence: 99%

The Master Catalogue of stars towards the Magellanic Clouds

Delmotte¹,

Loup²,

Egret³

et al. 2002

A&A

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Abstract. The Master Catalogue of stars towards the Magellanic Clouds (MC2) is a multi-wavelength reference catalogue. The current paper presents the first results of the MC2 project. We started with a massive cross-identification of the two recently released near-infrared surveys: the DENIS Catalogue towards the Magellanic Clouds (DCMC) with more than 1.3 million sources identified in at least two of the three DENIS filters (I J K s ) and the 2nd Incremental Release of the 2MASS point source catalogue (J H K s ) covering the same region of the sky. Both point source catalogues provide an unprecedented wealth of data on the stellar populations of the Magellanic Clouds (MCs). The cross-matching procedure has been extended to optical wavelength ranges, including the UCAC1 (USNO) and GSC2.2 catalogues. New cross-matching procedures for very large catalogues have been developed and important results on the astrometric and photometric accuracy of the cross-identified catalogues were derived. The cross-matching of large surveys is an essential tool to improve our understanding of their specific contents. This study has been partly supported by the  project that aims at improving access to astronomical archives as virtual telescopes.

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An all-sky set of $\vec (B)-V-R$ photometric calibrators for Schmidt surveys

Cited by 34 publications

References 17 publications

Photometric parallaxes of Southern high proper motion stars. I.

Photometric parallaxes of Southern high proper motion stars. I.

Low redshift AGN in the Hamburg/ESO survey

The Master Catalogue of stars towards the Magellanic Clouds

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