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The XMM-Newton wide field survey in the COSMOS field: Clustering dependence of X-ray selected AGN on host galaxy properties
Finoguenov, A.; Salvato, M.; Gilli, R. +5 more
Aims: We study the spatial clustering of 632 (1130) XMM-COSMOS active galactic nuclei (AGNs) with known spectroscopic or photometric redshifts in the range z = [0.1-2.5] in order to measure the AGN bias and estimate the typical mass of the hosting dark matter (DM) halo as a function of AGN host galaxy properties.
Methods: We created AGN …
The Period Change of Cyg X-3
Antokhin, Igor I.; Cherepashchuk, Anatol M.
By using available archival X-ray data, we significantly extended the list of times of X-ray minima. The new list includes 65 data points obtained by critically reanalyzing RXTE ASM data, 88 data points based on observations by MAXI, and 2 data points based on observations by SUZAKU and AstroSat. Analyzing the data along with times of X-ray minima…
Time-series Spectroscopy of the Oscillating Eclipsing Algol System V392 Orionis
Koo, Jae-Rim; Han, Cheongho; Kim, Seung-Lee +5 more
We present the results from a detailed analysis of our high-resolution spectra and historical photometric observations of the semidetached eclipsing binary V392 Ori with a δ Scuti (δ Sct) pulsating component. A total of 31 spectroscopic observations were carried out at both the Bohyunsan Optical Astronomy Observatory in Korea and the Thai National…
The Composite Nature of Dust-obscured Galaxies (DOGs) at z ∼ 2-3 in the COSMOS Field. II. The AGN Fraction
Koekemoer, Anton M.; Schawinski, Kevin; Lusso, Elisabeta +18 more
We present the X-ray properties of 108 Dust-Obscured Galaxies (DOGs; F 24 µm/F R > 1000) in the COSMOS field, all of which are detected in at least three far-infrared bands with the Herschel Observatory. Out of the entire sample, 22 are individually detected in the hard 2-8 keV X-ray band by the Chandra COSMOS Lega…
New Evidence for Third Harmonic Electromagnetic Radiation in Interplanetary Type III Solar Radio Bursts
MacDowall, R. J.; Reiner, M. J.
This article provides new evidence for a third harmonic component in the electromagnetic radiation generated by interplanetary type III solar radio bursts observed locally near 1 AU. This evidence comes mainly from the analysis of the low-frequency radio emissions observed by the Wind spacecraft. The analysis examines, at high-time and high-freque…
CCD Photometry, Light Curve Modeling, and Period Study of the Overcontact Binary Systems V647 Virginis and V948 Monocerotis
Alton, K. B.
Prior to this investigation, monochromatic CCD data for V647 Vir and V948 Mon had only been generated from automated surveys which employ sparse sampling strategies. In this study precise multi-color (B, V, and Ic) light curve data for V647 Vir (2018) and V948 Mon (2017-2018) were acquired at Desert Bloom Observatory (DBO). Both targets…
Global Diagnostics of Ionospheric Absorption During X-Ray Solar Flares Based on 8- to 20-MHz Noise Measured by Over-the-Horizon Radars
Lester, M.; Marchaudon, A.; Marcucci, M. F. +9 more
An analysis of noise attenuation during 80 solar flares between 2013 and 2017 was carried out at frequencies 8-20 MHz using 34 Super Dual Auroral Radar Network radars and the EKB ISTP SB RAS radar. The attenuation was determined on the basis of noise measurements performed by the radars during the intervals between transmitting periods. The locati…
New phase-magnitude curves for some main belt asteroids, fit of different photometric systems and calibration of the albedo - Photometry relation
Cellino, A.; Carbognani, A.; Caminiti, S.
Results of photometric observations of a small sample of selected Main Belt asteroids are presented. The obtained measurements can be used to achieve a better calibration of the asteroid photometric system (H, G1 , G2) adopted by the IAU, and to make comparisons with best-fit curves that can be obtained using different photom…
3D thermal modeling of two selected regions on comet 67P and comparison with Rosetta/MIRO measurements
Skorov, Yuri; Macher, Wolfgang; Rezac, Ladislav +3 more
Context. The Microwave Instrument for the Rosetta Orbiter (MIRO) was one of the key instruments of the Rosetta mission, which acquired a wealth of data, in particular as the orbiter moved in the close environment of comet 67P/Churyumov-Gerasimenko (August 2014-September 2016). It was the only instrument of the Rosetta payload that was able to meas…
Multiwavelength spectroscopy of the black hole candidate MAXI J1813-095 during its discovery outburst
De Marco, B.; Armas Padilla, M.; Jiménez-Ibarra, F. +5 more
MAXI J1813-095 is an X-ray transient discovered during an outburst in 2018. We report on X-ray and optical observations obtained during this event, which indicate that the source is a new low-mass X-ray binary. The outburst lasted ∼70 d and peaked at LX(0.5-10 keV) ∼ 7.6 × 1036 erg s-1, assuming a distance of 8 kpc…