Catálogo de publicaciones - revistas

<jats:title>Abstract</jats:title> <jats:p>Future stellar encounters with the Sun might disturb the outskirts of the solar system, for close-enough passages. Such encounters may send small bodies toward the inner regions of the solar system. In the near future and among known stars, none will pass closer to the Sun than Gliese 710. Here, we present an updated analysis of this topic using Gaia EDR3 data. Our new estimate confirms, within errors, those already published, but suggests a slightly closer in distance (at 0.051 ± 0.003 pc) and later in time (in 1.29 ± 0.04 Myr) flyby of Gliese 710 to the solar system.</jats:p>

<jats:title>Abstract</jats:title> <jats:p>The Early Gaia Data Release 3 (EDR3) provides precise astrometry for nearly 1.5 billion sources across the entire sky. A few tens of these are associated with neutron stars in the Milky Way and Magellanic Clouds. Here, we report on a search for EDR3 counterparts to known rotation-powered pulsars using the method outlined in Antoniadis. A cross-correlation between EDR3 and the ATNF pulsar catalog identifies 41 close astrometric pairs (≲05 at the reference epoch of the pulsar position). Twenty six of these are related to previously known optical counterparts, while the rest are candidate pairs that require further follow-up. Highlights include the Crab Pulsar (PSR B0531+21), for which EDR3 yields a distance of <jats:inline-formula> <jats:tex-math> <?CDATA ${2.08}_{-0.45}^{+0.78}$?> </jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msubsup> <mml:mrow> <mml:mn>2.08</mml:mn> </mml:mrow> <mml:mrow> <mml:mo>−</mml:mo> <mml:mn>0.45</mml:mn> </mml:mrow> <mml:mrow> <mml:mo>+</mml:mo> <mml:mn>0.78</mml:mn> </mml:mrow> </mml:msubsup> </mml:math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="rnaasabd189ieqn1.gif" xlink:type="simple" /> </jats:inline-formula> kpc (or <jats:inline-formula> <jats:tex-math> <?CDATA ${2.00}_{-0.38}^{+0.56}$?> </jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msubsup> <mml:mrow> <mml:mn>2.00</mml:mn> </mml:mrow> <mml:mrow> <mml:mo>−</mml:mo> <mml:mn>0.38</mml:mn> </mml:mrow> <mml:mrow> <mml:mo>+</mml:mo> <mml:mn>0.56</mml:mn> </mml:mrow> </mml:msubsup> </mml:math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="rnaasabd189ieqn2.gif" xlink:type="simple" /> </jats:inline-formula> kpc taking into account the dispersion-measure prior; errors indicate 95% confidence limits) and PSR 1638−4608, a pulsar thus-far considered to be isolated that lies within 0056 of a Gaia source.</jats:p>

<jats:title>Abstract</jats:title> <jats:p>We present the results of MASTER Global Robotic Net optical observations of LIGO/Virgo S200224ca error-box (O3 set). We observed 380 square degrees inside the 3<jats:italic>σ</jats:italic> error box during 1 month. We present optical transients found by MASTER auto-detection system during this inspection. They are not the optical counterparts, but the result of MASTER observation strategy, that is is briefly discussed. Also we present short analysis of Swift-UVOT, -XRT transients in MASTER database since 2010.</jats:p>

<jats:title>Abstract</jats:title> <jats:p>In 2015 June, the symbiotic binary star AG Pegasi underwent a period of outburst. SkyCam T, mounted onboard the 2 m Liverpool Telescope, collected over 650 unfiltered images of this event, and several thousand images from before and after. This note presents Sloan <jats:italic>r</jats:italic>′ band light curves obtained from these images. In addition, a color–magnitude diagram (CMD) using AAVSO data is included to infer parameters of the system’s white dwarf (WD). Features in the light curve allow one to classify this outburst as that of classical (or Z And) type. The CMD suggests the temperature and luminosity of the WD increase concurrently to produce the light curve maxima. Light curves either side of the event show wave-like oscillations owing to the orbital period of AG Pegasi’s components, indicating quiescence.</jats:p>

<jats:title>Abstract</jats:title> <jats:p>While Transiting Exoplanet Survey Satellite (TESS) covers a considerable area of the sky during routine observations and the pointing schedule is easy to follow, it is not obvious to retrieve the current and/or predicted visibility of a bulk amount of objects, considering both stationary and moving Solar System targets like asteroids or comets. The program <jats:monospace>tessvisibility</jats:monospace> is a small piece of highly portable code implemented in both C an UNIX shell, providing functionalities for such bulk retrievals at the accuracy of a TESS pixel. This accuracy includes the gaps between the focal plane CCDs, the gaps between the cameras as well as at the sector-level treatment to obtain visibility information.</jats:p>

<jats:title>Abstract</jats:title> <jats:p>The results of LIGO/Virgo S200302c (O3) error-box optical inspection by MASTER are presented. We observed 4242 square degrees square degrees inside 3<jats:italic>σ</jats:italic> error box during 1 month. We present MASTER OT J141401.39–483305.7, MASTER OT J215856.95–392909.6, MASTER OT J061642.05+435617.9, MASTER OT J052817.95+672801.4—optical transients found by the MASTER auto-detection system during this inspection as the result of a survey of large error-fields, indicating the efficiency of MASTER observational strategy.</jats:p>