Northern [ITAL]JHK[/ITAL] Standard Stars for Array Detectors

Hunt, L. K.; Mannucci, F.; Testi, L.; Migliorini, Stefano; Stanga, R.; Baffa, C.; Lisi, F.; Vanzi, L.

doi:10.1086/300349

Cited by 218 publications

(221 citation statements)

References 15 publications

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“…Most of the flux standards were drawn from Persson et al (1998) and Hunt et al (1998), complemented by a small number of UKIRT standards (Hawarden et al 2001).…”

Section: Quality Control Of Ob Imagesmentioning

confidence: 99%

The Great Observatories Origins Deep Survey

Retzlaff¹,

Rosati²,

Dickinson³

et al. 2010

A&A

135

125

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Aims. We present the final public data release of the VLT/ISAAC near-infrared imaging survey in the GOODS-South field. The survey covers an area of 172.5, 159.6 and 173.1 arcmin 2 in the J, H, and K s bands, respectively. For point sources total limiting magnitudes of J = 25.0, H = 24.5, and K s = 24.4 (5σ, AB) are reached within 75% of the survey area. Thus these observations are significantly deeper than the previous EIS Deep Public Survey which covers the same region. The image quality is characterized by a point spread function ranging between 0.34 and 0.65 FWHM. The images are registered to a common astrometric grid defined by the GSC 2 with an accuracy of ∼0.06 RMS over the whole field. The overall photometric accuracy, including all systematic effects, adds up to 0.05 mag. The data are publicly available from the ESO science archive facility. Methods. We describe the data reduction, the calibration, and the quality control process. The final data set is characterized in terms of astrometric and photometric properties, including the PSF and the curve of growth. We establish an empirical model for the sky background noise in order to quantify the variation of limiting depth and statistical photometric errors over the survey area. We define a catalog of K s -selected sources which contains JHK s photometry for 7079 objects. Differential aperture corrections were applied to the color measurements in order to avoid possible biases as a result of the variation of the PSF. We briefly discuss the resulting color distributions in the context of available redshift data. Furthermore, we estimate the completeness fraction and relative contamination due to spurious detections for source catalogs extracted from the survey data. For this purpose, an empirical study based on a deep K s image of the Hubble Ultra Deep Field is combined with extensive image simulations. Results. With respect to previous deep near-infrared surveys, the surface density of faint galaxies has been established with unprecedented accuracy by virtue of the unique combination of depth and area of this survey. We derived galaxy number counts over eight magnitudes in flux up to J = 25.25, H = 25.0, K s = 25.25 (in the AB system). Very similar faint-end logarithmic slopes between 0.24 and 0.27 mag −1 were measured in the three bands. We found no evidence for a significant change in the slope of the logarithmic galaxy number counts at the faint end.

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“…Most of the flux standards were drawn from Persson et al (1998) and Hunt et al (1998), complemented by a small number of UKIRT standards (Hawarden et al 2001).…”

Section: Quality Control Of Ob Imagesmentioning

confidence: 99%

The Great Observatories Origins Deep Survey

Retzlaff¹,

Rosati²,

Dickinson³

et al. 2010

A&A

135

125

View full text Add to dashboard Cite

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“…Wavelength calibration was performed using an Argon lamp and deep telluric absorption features. The telluric absorption was then removed by dividing each of the object spectra by an A0 reference star spectrum observed at similar airmass; the reference star was generally drawn from the Arnica standards list (Hunt et al 1998). Finally, flux normalization was completed using a theoretical A0 star spectrum smoothed to the appropriate resolution.…”

Section: Observations and Data Reductionmentioning

confidence: 99%

A low-resolution near-infrared spectral library of M-, L-, and T-dwarfs

Testi

2009

A&A

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We present complete near-infrared (0.85-2.45 μm), low-resolution (R ∼ 100) spectra of a sample of 54 disk M-, L-, and T-dwarfs with reliable optical or near infrared spectral-type classification from the literature. The observations were obtained with a prism-based optical element, the Amici device, which provides a complete spectrum of the source on the detector. Our observations indicate that low-resolution near-infrared spectroscopy can be used to determine the spectral classification of late-type field dwarfs in a fast but accurate way. We derive a set of near-infrared spectral indices that are useful to the classification of field dwarfs not seriously affected by reddening. Finally, we show that the comparison of Amici spectra with model atmospheres allows us to obtain a reliable estimate of the dwarf effective temperatures.

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“…Having a larger instrumental pixel scale than the seeing size also a †ected the limiting magnitude in the near-infrared bands. We took two Ðelds of standard stars of the optical, 109-954 and 110-232 (Landolt 1992), and the near-infrared, FS 28 and FS 35 (Hunt et al 1998). The Ðelds of 109-954 and 110-232 have three and four standard stars, respectively, and both the Ðelds of FS 28 and FS 35 have three standard stars.…”

Section: Observationmentioning

confidence: 99%

A Highly Reddened Star Cluster Embedded in the Galactic Plane

Nakaya

Watanabe

Ando

et al. 2001

The Astronomical Journal

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We found a cluster of early-type star candidates embedded in the Galactic plane by using optical to near-infrared broadband imaging. The observed region is around the 10 highly reddened stars found as a possible new and very remote open cluster by Stephenson. The 10 stars are identiÐed as red supergiants, and several similar stars are newly found in our images. Furthermore, 25 early-type star candidates suffering visual extinction of have been identiÐed from various color-magnitude and color-color A V D 11.2 diagrams. These stars are likely to make a star cluster, and we estimate its age and distance to be D107.7 yr and D1.5 kpc, respectively.

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Northern [ITAL]JHK[/ITAL] Standard Stars for Array Detectors

Cited by 218 publications

References 15 publications

The Great Observatories Origins Deep Survey

The Great Observatories Origins Deep Survey

A low-resolution near-infrared spectral library of M-, L-, and T-dwarfs

A Highly Reddened Star Cluster Embedded in the Galactic Plane

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