Search Publications
The Calar Alto CAFOS direct imaging first data release
Cortés-Contreras, M.; Solano, E.; Rodrigo, C. +3 more
We present the first release of the Calar Alto CAFOS direct imaging data, a project led by the Spanish Virtual Observatory with the goal of enhancing the use of the Calar Alto archive by the astrophysics community. Data Release 1 contains 23 903 reduced and astrometrically calibrated images taken from 2008 March to 2019 July with a median of the m…
Identifying the Variety of Jovian X-Ray Auroral Structures: Tying the Morphology of X-Ray Emissions to Associated Magnetospheric Dynamics
Jackman, C. M.; Kurth, W. S.; Branduardi-Raymont, G. +12 more
We define the spatial clustering of X-rays within Jupiter's northern auroral regions by classifying their distributions into "X-ray auroral structures." Using data from Chandra during Juno's main mission observations (24 May 2016 to 8 September 2019), we define five X-ray structures based on their ionospheric location and calculate the distributio…
Light curve analysis of main belt asteroids 4747, 5255, 11411, 15433, 17866
Eglitis, Ilgmars; Kristers, Nagainis
The main belt asteroids 4747, 5255, 11411, 15433, and 17866 were studied at the Baldone Astrophysical Observatory in the time span range 2018-2022. The obtained light curve data together with published Minor Planet Center data are analyzed with Fourier series, Lomb-Scargle periodogram, and phase dispersion minimization methods. A plan of analysis …
X-ray emission of the radio-loud quasar SDSS J121426.52+140258.9: independent variations between optical/UV and X-ray emission
Anjum, Muhammad S.; Liao, Mai; Gu, Minfeng +1 more
To understand the X-ray emission of active galactic nuclei (AGNs), we explored the optical-to-X-ray variation correlation of a radio-loud quasar (RLQ) SDSS J121426.52+140258.9 (hereafter J1214+1402) with multi-epoch observations by the Swift and XMM-Newton telescopes. With the historical multiband data, we found that the infrared-to-X-ray flux of …
Serverless Architecture for Data Processing and Detecting Anomalies with the Mars Express MARSIS Instrument
Titov, Dmitrij V.; Sánchez-Cano, Beatriz; Pacios, David +4 more
The Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) on board Mars Express has been sampling the topside ionosphere of Mars since mid-2005. The analysis of the main reflection (nadir) of the ionosphere through the ionograms provided by the MARSIS instrument is typically performed manually due to the high noise level in the lower…
X‑HESS: A large sample of highly accreting serendipitous AGN under the XMM‑Newton microscope
Guainazzi, M.; Piconcelli, E.; Tombesi, F. +3 more
The bulk of X‑ray spectroscopic studies of active galactic nuclei (AGN) are focused on local () sources with low‑to‑moderate (<0.3) Eddington ratio (). It is then mandatory to overcome this limitation and improve our understanding of highly accreting AGN. In this work, we present the preliminary results from the analysis of a sample of high‑ ra…
Velocity of magnetic holes in the solar wind from Cluster multipoint measurements
Raptis, Savvas; Karlsson, Tomas; Trollvik, Henriette
We present the first statistical study on the velocity of magnetic holes (MHs) in the solar wind. Magnetic holes are localized depressions of the magnetic field, often divided into two classes: rotational and linear MHs. We have conducted a timing analysis of observations of MHs from the Cluster mission in the first quarter of 2005. In total, 69 e…
Erratum: "Temporal Evolution of Titan's Stratospheric Temperatures and Trace Gases from a Two-dimensional Retrieval of Cassini Composite Infrared Spectrometer Data" (2023, PSJ, 4, 140)
Achterberg, Richard K.
Photometric Distance to the RR Lyrae Star SW Andromedae Using Period-Luminosity-Metallicity Relationships
Payne, E.; Dow, T.; Bergstedt, J. +4 more
Cáceres and Catelans' period-luminosity-metallicity equations give us a way to measure the photometric distance to RR Lyrae stars using absolute magnitude equations that rely on the specific photometric filter (V, i, and z), the period, and the metallicity. Over a period of two weeks, 76 images of the RR Lyr Star SW Andromedae were taken in the B,…
CD -27°11535: Evidence for a Triple System in the β Pictoris Moving Group
Kalas, Paul; De Rosa, Robert J.; Macintosh, Bruce +20 more
We present new spatially resolved astrometry and photometry of the CD -27°11535 system, a member of the β Pictoris moving group consisting of two resolved K-type stars on a ~20 yr orbit. We fit an orbit to relative astrometry measured from NIRC2, GPI, and archival NaCo images, in addition to literature measurements. However, the total mass inferre…