217 citations · 488 across the 13 of their papers we have counts for
13 papers
Scientific Validation of the SPARC4 Pipeline: Multi-band Imaging, Polarimetry, and Photometric Time Series for Improved Characterization of Transiting Exoplanets
Eder Martioli, Claudia V. Rodrigues, Julio C. N. Campagnolo +14
High-cadence multi-band imaging and polarimetry have important scientific applications in astronomy. Observations of transits of exoplanets are a particular application that requir…
The rings of (2060) Chiron: Evidence of an evolving system
C. L. Pereira, F. Braga-Ribas, B. Sicardy +54
The centaur (2060) Chiron has long been a candidate for hosting material in orbit, based on occultation and photometric and spectroscopic data. Here, we present a multichord stella…
The young exoplanetary system TOI-4562: Confirming the presence of a third body in the system
V. Fermiano, R. K. Saito, V. D. Ivanov +11
Young planetary systems represent an opportunity to investigate the early stages of (exo)planetary formation because the gravitational interactions have not yet significantly chang…
Recovering variable stars in large surveys: EA Algol-type class in the Catalina Survey
A. Carmo, C. E. Ferreira Lopes, A. Papageorgiou +5
The discovery and characterization of Algol eclipsing binaries (EAs) provide an opportunity to contribute for a better picture of the structure and evolution of low-mass stars. How…
Distinguishing Circumstellar from Stellar Photometric Variability in Eta Carinae
Augusto Damineli, Eduardo Fernández-Lajús, Leonardo A. Almeida +14
The interacting binary Eta Carinae remains one of the most enigmatic massive stars in our Galaxy despite over four centuries of observations. In this work, its light curve from the…
New Insights into Time Series Analysis III - Setting constraints on period analysis
C. E. Ferreira Lopes, N. J. G. Cross, F. Jablonski
E-science of photometric data requires automatic procedures and a precise recognition of periodic patterns to perform science as well as possible on large data. Analytical equation…
Multi-band characterization of the hot Jupiters: WASP-5b, WASP-44b and WASP-46b
M. Moyano, L. A. Almeida, C. von Essen +2
We have carried out a campaign to characterize the hot Jupiters WASP-5b, WASP-44b and WASP-46b using multiband photometry collected at the Observatório do Pico Dos Dias in Brazil.…
MLS110213:022733+130617: A new eclipsing polar above the period gap
K. M. G Silva, C. V. Rodrigues, A. S. Oliveira +4
This study confirms MLS110213:022733+130617 as a new eclipsing polar. We performed optical spectroscopic, polarimetric and photometric follow-up of this variable source identified…
Two possible circumbinary planets in the eclipsing post-common envelope system NSVS 14256825
L. A. Almeida, F. Jablonski, C. V. Rodrigues
We present an analysis of eclipse timings of the post-common envelope binary NSVS 14256825, which is composed of an sdOB star and a dM star in a close orbit (P_{orb} = 0.110374 day…
A photometric and spectroscopic study of NSVS 14256825: the second sdOB+dM eclipsing binary
L. A. Almeida, F. Jablonski, J. Tello +1
We present an analysis of UBVRIJH photometry and phase-resolved optical spectroscopy of NSVS 14256825, an HW Vir type binary. The members of this class consist…
A Cold Neptune-Mass Planet OGLE-2007-BLG-368Lb: Cold Neptunes Are Common
T. Sumi, D. P. Bennett, I. A. Bond +104
We present the discovery of a Neptune-mass planet OGLE-2007-BLG-368Lb with a planet-star mass ratio of q=[9.5 +/- 2.1] x 10^{-5} via gravitational microlensing. The planetary devia…
The Orbital Period of the Accreting Pulsar GX1+4
Marildo G. Pereira, Joao Braga, Francisco J. Jablonski
We report strong evidence for a ~304-day periodicity in the spin history of the accretion-powered pulsar GX1+4 that is most probably associated with the orbital period of the syste…
Optical Monitoring of Quasars: I. Variability
A. Garcia, L. Sodre, F. J. Jablonski +1
We present an analysis of quasar variability from data collected during a photometric monitoring of 50 objects carried out at CNPq/Laboratorio Nacional de Astrofisica, Brazil, betw…