Saying no to prep research in malawi

Peterson, Kristin; Foláyan, Morẹ́nikẹ́ Oluwátóyìn; Chigwedere, Edward; Nthete, Evaristo

doi:10.4324/9781315209685-6

Cited by 1 publication

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“…To assess the fraction of flux lost from mag auto of the galaxies in the observed fields, we performed detailed simulations matching five of the 15 clusters, spanning the relevant parameter space in redshifts, image quality, and filters. The simulations were created using python software by Peterson et al (2018), produced during Pe- Figure 6. Distribution of mag auto for stars (blue) and galaxies (red) in the fields.…”

Section: Sextractor Magnitudes Versus Total Magnitudesmentioning

confidence: 99%

The Gemini/HST Galaxy Cluster Project: Redshift 0.2–1.0 Cluster Sample, X-Ray Data, and Optical Photometry Catalog

Jørgensen

Chiboucas

Hibon

et al. 2018

ApJS

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The Gemini/HST Galaxy Cluster Project (GCP) covers 14 z = 0.2 − 1.0 clusters with X-ray luminosity of L 500 ≥ 10 44 ergs s −1 in the 0.1-2.4 keV band. In this paper we provide homogeneously calibrated X-ray luminosities, masses and radii, and we present the complete catalog of the ground-based photometry for the GCP clusters. The clusters were observed with Gemini North or South in three or four of the optical passbands g ′ , r ′ , i ′ and z ′ . The photometric catalog includes consistently calibrated total magnitudes, colors, and geometrical parameters. The photometry reaches ≈ 25 mag in the passband closest to rest frame B-band. We summarize comparisons of our photometry with data from the Sloan Digital Sky Survey. We describe the sample selection for our spectroscopic observations, and establish the calibrations to obtain rest frame magnitudes and colors. Finally, we derive the color-magnitude relations for the clusters and briefly discuss these in the context of evolution with redshift. Consistent with our results based on spectroscopic data, the color-magnitude relations support passive evolution of the red-sequence galaxies. The absence of change in the slope with redshift, constrains the allowable age variation along the red sequence to < 0.05 dex between the brightest cluster galaxies and those four magnitudes fainter. The paper serves as the main reference for the GCP cluster and galaxy selection, X-ray data and ground-based photometry.

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Section: Sextractor Magnitudes Versus Total Magnitudesmentioning

confidence: 99%