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Optical Spectroscopic Observations of Gamma-ray Blazar Candidates. IV. Results of the 2014 Follow-up Campaign
Stern, D.; Smith, Howard A.; Masetti, N. +7 more
The extragalactic γ-ray sky is dominated by the emission arising from blazars, one of the most peculiar classes of radio-loud active galaxies. Since the launch of Fermi several methods were developed to search for blazars as potential counterparts of unidentified γ-ray sources (UGSs). To confirm the nature of the selected candidates, optical spect…
WIYN Open Cluster Study. LXVI. Spectroscopic Binary Orbits in the Young Open Cluster M35 (NGC 2168)
Gosnell, N. M.; Leiner, E. M.; Mathieu, R. D. +1 more
The young (150 Myr) open cluster M35 (NGC 2168) has been one of the core clusters of the WIYN Open Cluster Study since 1997. Over these 17 years we have obtained approximately 8000 radial-velocity (RV) measurements of stars in the M35 field, which we provide here. Our target sample consists of 1355 photometrically selected stars in the field of M3…
The Chandra Local Volume Survey. I. The X-Ray Point Source Populations of NGC 55, NGC 2403, and NGC 4214
Dalcanton, J. J.; Skillman, E. D.; Kong, A. K. H. +7 more
We present comprehensive X-ray point source catalogs of NGC 55, NGC 2403, and NGC 4214 as part of the Chandra Local Volume Survey. The combined archival observations have effective exposure times of 56.5 ks, 190 ks, and 79 ks for NGC 55, NGC 2403, and NGC 4214, respectively. When combined with our published catalogs for NGC 300 and NGC 404, our su…
An X-Ray Flare from 47 Cas
Karmakar, Subhajeet; Pandey, Jeewan C.
Using XMM-Newton observations, we investigate properties of a flare from the very active but poorly known stellar system 47 Cas. The luminosity at the peak of the flare is found to be 3.54 × 1030 erg {{s}-1}, which is ∼2 times higher than that at a quiescent state. The quiescent state corona of 47 Cas can be represented by tw…
A Catalog of Point Sources Toward NGC 1333
Rebull, L. M.
I present a catalog of point-source objects toward NGC 1333, resolving a wide variety of confusion about source names (and occasionally positions) in the literature. I incorporate data from optical to radio wavelengths, but focus most of the effort on being complete and accurate from J (1.25 µm) to 24 µm. The catalog encompasses 52^\ci…
AGN Activity and IGM Heating in the Fossil Cluster RX J1416.4+2315
Raychaudhury, S.; Sengupta, C.; Khosroshahi, H. G. +3 more
We study active galactic nucleus (AGN) activity in the fossil galaxy cluster RX J1416.4+2315. Radio observations were carried out using the Giant Metrewave Radio Telescope at two frequencies, 1420 and 610 MHz. A weak radio lobe that extends from the central nucleus is detected in the 610 MHz map. Assuming the radio lobe originated from the central…
A Statistical Study of H I Gas in Nearby Narrow-Line AGN-Hosting Galaxies
Wu, Hong; Zhu, Yi-Nan
As a quenching mechanism, active galactic nucleus (AGN) feedback could suppress on going star formation in host galaxies. On the basis of a sample of galaxies selected from the Arecibo Legacy Fast ALFA (ALFALFA) H i survey, the dependence of the H i mass (MH i), stellar mass (M*), and H i-to-stellar mass ratio (MH i