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SkyMapper Southern Survey: First Data Release (DR1)

Wolf, Christian; Murphy, Simon J.; Schmidt, Brian P. +14 more

We present the first data release of the SkyMapper Southern Survey, a hemispheric survey carried out with the SkyMapper Telescope at Siding Spring Observatory in Australia. Here, we present the survey strategy, data processing, catalogue construction, and database schema. The first data release dataset includes over 66 000 images from the Shallow …

Discovery of the Most Ultra-Luminous QSO Using GAIA, SkyMapper, and WISE

Wolf, Christian; Schmidt, Brian P.; Bian, Fuyan +5 more

We report the discovery of the ultra-luminous quasi-stellar object SMSS J215728.21-360215.1 with magnitude z = 16.9 and W4 = 7.42 at redshift 4.75. Given absolute magnitudes of M_{145, AB} = -29.3, M_{300, AB} = -30.12, and logL_bol/L_{bol, ⊙} = 14.84, it is the quasi-stellar object with the highest unlensed UV-op…

The Data-Driven Approach to Spectroscopic Analyses

Ness, M.

I review the data-driven approach to spectroscopy, The Cannon, which is a method for deriving fundamental diagnostics of galaxy formation of precise chemical compositions and stellar ages, across many stellar surveys that are mapping the Milky Way. With The Cannon, the abundances and stellar parameters from the multitude of stellar surveys can be …

A New Globular Cluster in the Area of VVVX

Minniti, D.; Bonatto, C.; Bica, E. +1 more

We communicate the discovery of a new globular cluster in the Galaxy that was first detected on WISE/2MASS images and is now confirmed with VVVX photometry. It is a Palomar-like cluster projected at ℓ = 359.15°, b = 5.73°, and may be related to the bulge. We derive an absolute magnitude of M_V ≈ -3.3, thus being an underluminous globular…

A correlation between GALEX FUV magnitude and chromospheric activity among red giant stars

Smith, Graeme H.

It is shown that upon combining GALEX far-ultraviolet and Johnson B magnitudes a resultant FUV-B colour can be obtained that for red giant stars of luminosity classes III and II correlates well with chromospheric emission in the cores of the Mg II h and k lines. Giant stars throughout the colour range 0.8 ≤ B - V ≤ 1.6 exhibit such a phenomenon. T…