is the predominant contributor whereas for IRAS F15307+3252 the dust torus component dominates. The implied star formation rates (SFR) for these three sources estimated from their infrared luminosities are and are amongst the highest SFRs estimated to date. We also demonstrate that the well-known radio

Low levels of polycyclic hydrocarbon (PAH) emission in the spectra of dwarf galaxies has been a puzzle for the past 20 years. Here, we present the mid-infrared (MIR) properties of 27 extremely low luminosity dwarf galaxies (M

We propose that the intermediate luminosity optical transient NGC 300 OT2008-1 was powered by a mass transfer episode from an extreme Asymptotic Giant Branch star to a Main Sequence companion. We find a remarkable similarity of the shapes of the light curves of the several months long NGC 300 OT

), which vary only on a few percent level. The variability in radio-quiet quasars confirms that the radio emission in these sources is indeed related to the AGN. The most extremely variable source is the radio-intermediate quasar III Zw 2 which was recently found to contain a relativistic jet. In addition

We examine a sample of low redshift (10 < d < 150 h −1 Mpc) field galaxies including galaxies with luminosities as low as Mr − 5 log 10 h ∼ −12.5, selected from the Sloan Digital Sky Survey Data Release 2 (SDSS). The sample is unique in containing galaxies of extremely low luminosities in a

We report the discovery of two extremely low luminosity globular clusters in the Milky Way Halo. These objects were detected in the Sloan Digital Sky Survey Data Release 5 and confirmed with deeper imaging at the Calar Alto Observatory. The clusters, Koposov 1 and Koposov 2, are located at ∼ 40

Abstract not found

Luminosity measurements at the high luminosity points of the LHC are very challenging due to the extremely high radiation levels in the order of 180 MGy/yr. We have designed an ionization chamber that uses a flowing inorganic gas mixture and a combination of metals and ceramics. With such a choice

as derive the QSO host galaxy luminosity function. We have analyzed 49 objects with WFPC2 images using procedures we developed and combined our results with similarly-derived results from the literature for the remaining 22 objects. The host galaxies span a narrow range of luminosities and are exceptionally

Both the detection of galaxies and the derivation of the luminosity function depend upon isophotal magnitudes, implicitly in the first case, and explicitly in the latter. However, unlike perfect point sources, the fraction of a galaxy’s light contained within the limiting isophote is a function