Article
Astronomy & Astrophysics
P. Sartoretti, O. Marchal, C. Babusiaux, C. Jordi, A. Guerrier, P. Panuzzo, D. Katz, G. M. Seabroke, F. Thevenin, M. Cropper, K. Benson, R. Blomme, R. Haigron, M. Smith, S. Baker, L. Chemin, M. David, C. Dolding, Y. Fremat, K. Janssen, G. Jasniewicz, A. Lobel, G. Plum, N. Samaras, O. Snaith, C. Soubiran, O. Vanel, T. Zwitter, N. Brouillet, E. Caffau, F. Crifo, C. Fabre, F. Fragkoudi, A. Jean-Antoine Piccolo, H. E. Huckle, Y. Lasne, N. Leclerc, A. Mastrobuono-Battisti, F. Royer, Y. Viala, J. Zorec
Summary: This paper introduces the first release of magnitudes estimated from RVS spectra in Gaia Data Release 3. It describes the data used and the approach adopted to derive and validate the GRVS magnitudes. The paper also provides estimates of the G(RVS) passband and associated zero-point.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Guy Nir, Eran O. Ofek, Sagi Ben-Ami, Noam Segev, David Polishook, Ban Manulis
Summary: The Weizmann Fast Astronomical Survey Telescope has identified numerous flares lasting for about 0.1-0.3 seconds, most of which are caused by sunlight reflecting off geosynchronous and graveyard orbit satellites. These glints are common in large area surveys and some appear point-like, complicating the search for fast transients like fast radio burst counterparts and gamma-ray bursts. By observing in the direction of the Earth's shadow, the telescope was able to place an upper limit on the rate of fast astrophysical transients brighter than 11 mag.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
C. E. Ferreira Lopes, N. J. G. Cross, F. Jablonski
Summary: New time-series analysis tools are needed in disciplines such as astronomy, economics, and meteorology due to increasing rates of data collection at multiple wavelengths. The panchromatic correlated indices K-(fi)((s)) and L-(pfc)((s)) have been adapted to quantify the smoothness of a phased light-curve, resulting in new period-finding methods applicable to single- and multiband data. The proposed method has shown similar efficiency to existing methods and is effective in real and simulated data for finding periods in single and multiple wavebands sharing a fundamental frequency.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
M. Riello, F. De Angeli, D. W. Evans, P. Montegriffo, J. M. Carrasco, G. Busso, L. Palaversa, P. W. Burgess, C. Diener, M. Davidson, N. Rowell, C. Fabricius, C. Jordi, M. Bellazzini, E. Pancino, D. L. Harrison, C. Cacciari, F. van Leeuwen, N. C. Hambly, S. T. Hodgkin, P. J. Osborne, G. Altavilla, M. A. Barstow, A. G. A. Brown, M. Castellani, S. Cowell, F. De Luise, G. Gilmore, G. Giuffrida, S. Hidalgo, G. Holland, S. Marinoni, C. Pagani, A. M. Piersimoni, L. Pulone, S. Ragaini, M. Rainer, P. J. Richards, N. Sanna, N. A. Walton, M. Weiler, A. Yoldas
Summary: This paper focuses on the photometric content in Gaia Early Data Release 3 (Gaia EDR3), describing the input data, algorithms, processing, and validation of results. Significant improvements were made in the processing, particularly in the preprocessing and calibration of blue and red photometer data. The overall quality of calibrated mean photometry in Gaia EDR3 is superior to DR2 for all bands.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
C. E. Ferreira Lopes, N. J. G. Cross, F. Jablonski
Summary: New time-series analysis tools are needed for disciplines such as astronomy, economics, and meteorology. These new approaches are necessary to handle the increasing rate of data collection at multiple wavelengths. Simulations and observational data are used to test the effectiveness of the proposed method, demonstrating its efficiency in single and multiband data.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
P. Montegriffo, F. De Angeli, R. Andrae, M. Riello, E. Pancino, N. Sanna, M. Bellazzini, D. W. Evans, J. M. Carrasco, R. Sordo, G. Busso, C. Cacciari, C. Jordi, F. van Leeuwen, A. Vallenari, G. Altavilla, M. A. Barstow, A. G. A. Brown, P. W. Burgess, M. Castellani, S. Cowell, M. Davidson, F. De Luise, L. Delchambre, C. Diener, C. Fabricius, Y. Fremat, M. Fouesneau, G. Gilmore, G. Giuffrida, N. C. Hambly, D. L. Harrison, S. Hidalgo, S. T. Hodgkin, G. Holland, S. Marinoni, P. J. Osborne, C. Pagani, L. Palaversa, A. M. Piersimoni, L. Pulone, S. Ragaini, M. Rainer, P. J. Richards, N. Rowell, D. Ruz-Mieres, L. M. Sarro, N. A. Walton, A. Yoldas
Summary: This paper focuses on the external calibration of low-resolution spectroscopic content in Gaia Data Release 3, providing an instrument model that allows users to connect spectra to absolute fluxes and physical wavelengths. The calibration is achieved through total least-squares regression and modeling of the instrument dispersion relation, transmission, and line spread functions.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
F. De Angeli, M. Weiler, P. Montegriffo, D. W. Evans, M. Riello, R. Andrae, J. M. Carrasco, G. Busso, P. W. Burgess, C. Cacciari, M. Davidson, D. L. Harrison, S. T. Hodgkin, C. Jordi, P. J. Osborne, E. Pancino, G. Altavilla, M. A. Barstow, C. A. L. Bailer-Jones, M. Bellazzini, A. G. A. Brown, M. Castellani, S. Cowell, L. Delchambre, F. De Luise, C. Diener, C. Fabricius, M. Fouesneau, Y. Fremat, G. Gilmore, G. Giuffrida, N. C. Hambly, S. Hidalgo, G. Holland, Z. Kostrzewa-Rutkowska, F. van Leeuwen, A. Lobel, S. Marinoni, N. Miller, C. Pagani, L. Palaversa, A. M. Piersimoni, L. Pulone, S. Ragaini, M. Rainer, P. J. Richards, G. T. Rixon, D. Ruz-Mieres, N. Sanna, L. M. Sarro, N. Rowell, R. Sordo, N. A. Walton, A. Yoldas
Summary: This paper presents the processing techniques for converting raw satellite data into low-resolution blue and red photometer mean spectra, calibrated to an internal reference system. The calibration steps and the resulting time-averaged mean spectra are discussed. Scientific validation suggests that the internal calibration was generally successful.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
C. Lopez-Sanjuan, H. Yuan, H. Vazquez Ramio, J. Varela, D. Cristobal-Hornillos, P. -E. Tremblay, A. Marin-Franch, A. J. Cenarro, A. Ederoclite, E. J. Alfaro, A. Alvarez-Candal, S. Daflon, A. Hernan-Caballero, C. Hernandez-Monteagudo, F. M. Jimenez-Esteban, V. M. Placco, E. Tempel, J. Alcaniz, R. E. Angulo, R. A. Dupke, M. Moles, L. Sodre
Summary: The study focuses on the photometric calibration for the J-PLUS second data release, which includes adjustments based on metallicity variations along the Milky Way. This systematic effect is more significant in bluer passbands, while the overall calibration precision reaches 1-2% and accuracy remains below 1%.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
G. Altavilla, S. Marinoni, E. Pancino, S. Galleti, M. Bellazzini, N. Sanna, M. Rainer, G. Tessicini, J. M. Carrasco, A. Bragaglia, W. J. Schuster, G. Cocozza, M. Gebran, H. Voss, L. Federici, E. Masana, C. Jordi, M. Monguio, A. Castro, M. A. Pena-Guerrero, A. Perez-Villegas
Summary: This study presents BVRI photometry of candidate spectrophotometric standard stars for the external flux calibration of Gaia data. The data were used to calibrate the first two Gaia releases, with an overall agreement of about 1% accuracy across various samples and techniques. The Gaia photometric precision is currently at the order of 0.1%, prompting discussions on improving photometric calibration accuracy.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
T. L. Killestein, J. Lyman, D. Steeghs, K. Ackley, M. J. Dyer, K. Ulaczyk, R. Cutter, Y-L Mong, D. K. Galloway, V Dhillon, P. O'Brien, G. Ramsay, S. Poshyachinda, R. Kotak, R. P. Breton, L. K. Nuttall, E. Palle, D. Pollacco, E. Thrane, S. Aukkaravittayapun, S. Awiphan, U. Burhanudin, P. Chote, A. Chrimes, E. Daw, C. Duffy, R. Eyles-Ferris, B. Gompertz, T. Heikkila, P. Irawati, M. R. Kennedy, A. Levan, S. Littlefair, L. Makrygianni, D. Mata Sanchez, S. Mattila, J. Maund, J. McCormac, D. Mkrtichian, J. Mullaney, E. Rol, U. Sawangwit, E. Stanway, R. Starling, P. A. Strom, S. Tooke, K. Wiersema, S. C. Williams
Summary: This paper introduces a new real-bogus classifier based on a Bayesian convolutional neural network for nuanced classification and uncertainty-aware evaluation of transient candidates. The approach achieves competitive classification accuracy with classifiers trained with fully human-labelled data sets, through fully automated training set generation and data-driven augmentation methods.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Chemistry, Analytical
Oktawia Lewicka, Mariusz Specht, Andrzej Stateczny, Cezary Specht, David Brcic, Alen Jugovic, Szymon Widzgowski, Marta Wisniewska
Summary: The integration of geospatial data in hydrography involves combining different measurement systems and solving problems in electronics, geodesy, and physics. This study aims to compare the accuracy of fusion methods using data from various sources and evaluate them based on international standards.
Article
Astronomy & Astrophysics
E. Distefano, A. C. Lanzafame, E. Brugaletta, B. Holl, A. F. Lanza, S. Messina, I. Pagano, M. Audard, G. Jevardat De Fombelle, I. Lecoeur-Taibi, N. Mowlavi, K. Nienartowicz, L. Rimoldini, D. W. Evans, M. Riello, P. Garcia-Lario, P. Gavras, L. Eyer
Summary: This study presents a new catalogue of stars with variability induced by magnetic activity, generated using Gaia satellite data. The catalogue includes 474,026 stars, of which approximately 430,000 are newly discovered variables. The catalogue provides various parameters for each star, with the most important being the stellar rotation period, photometric amplitude of the rotational modulation signal, and the Pearson correlation coefficient between magnitude and colour variation.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Engineering, Civil
Andreas Dypvik Landmark, Petter Arnesen, Carl-Johan Sodersten, Odd Andre Hjelkrem
Summary: The widespread use of personal cell phones has sparked interest in utilizing Big Data generated by mobile phones in transportation research. However, constructing OD matrices from mobile phone data faces challenges and legal restrictions. Pre-compiled OD matrices may lack reliability due to data coarseness and privacy concerns.
Article
Astronomy & Astrophysics
F. Almeida-Fernandes, L. SamPedro, F. R. Herpich, A. Molino, C. E. Barbosa, M. L. Buzzo, R. A. Overzier, E. V. R. de Lima, L. M. Nakazono, G. B. Oliveira Schwarz, H. D. Perottoni, G. F. Bolutavicius, L. A. Gutierrez-Soto, T. Santos-Silva, A. Z. Vitorelli, A. Werle, D. D. Whitten, M. Costa Duarte, C. R. Bom, P. Coelho, L. Sodre Jr, V. M. Placco, G. S. M. Teixeira, J. Alonso-Garcia, C. L. Barbosa, T. C. Beers, C. J. Bonatto, A. L. Chies-Santos, E. A. Hartmann, R. Lopes de Oliveira, F. Navarete, A. Kanaan, T. Ribeiro, W. Schoenell, C. Mendes de Oliveira
Summary: This paper presents the second data release (DR2) of the ongoing Southern Photometric Local Universe Survey (S-PLUS), which covers an area of 950 deg(2). The data has been fully calibrated using a new photometric calibration technique, and the photometric zero-points (ZPs) have been refined by comparing the template-predicted and instrumental magnitudes. The paper also describes the complete data flow of S-PLUS/DR2 and provides a brief characterization of the data.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
A. J. Cordwell, N. J. Rattenbury, M. T. Bannister, P. Cowan, Fumio Abe, Richard Barry, David P. Bennett, Aparna Bhattacharya, Ian A. Bond, Hirosane Fujii, Akihiko Fukui, Yoshitaka Itow, Stela Ishitani Silva, Yuki Hirao, Rintaro Kirikawa, Iona Kondo, Naoki Koshimoto, Yutaka Matsubara, Sho Matsumoto, Yasushi Muraki, Shota Miyazaki, Arisa Okamura, Clement Ranc, Yuki Satoh, Takahiro Sumi, Daisuke Suzuki, Paul J. Tristram, Taiga Toda, Hibiki Yama, Atsunori Yonehara
Summary: The Microlensing Observations in Astrophysics (MOA-II) survey has been conducting high cadence, wide field observations of the Galactic Bulge from New Zealand since 2005. They have obtained rotation periods for 26 asteroids, including one that possibly exhibits non-principal axis rotation.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
J. Maiz Apellaniz, M. Pantaleoni Gonzalez, R. H. Barba, S. Simon-Diaz, I. Negueruela, D. J. Lennon, A. Sota, E. Trigueros Paez
ASTRONOMY & ASTROPHYSICS
(2018)
Article
Astronomy & Astrophysics
J. Maiz Apellaniz, M. Pantaleoni Gonzalez, R. H. Barba, S. Simon-Diaz, I. Negueruela, D. J. Lennon, A. Sota, E. Trigueros Paez
ASTRONOMY & ASTROPHYSICS
(2018)
Article
Astronomy & Astrophysics
J. Maiz Apellaniz, M. Pantaleoni Gonzalez, R. H. Barb, P. Garcia-Lario, F. Nogueras-Lara
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2020)
Article
Astronomy & Astrophysics
J. Maiz Apellaniz, R. H. Barba, C. Farina, A. Sota, M. Pantaleoni Gonzalez, G. Holgado, I. Negueruela, S. Simon-Diaz
Summary: The new lucky spectroscopy technique has successfully spatially disentangled O-type and B-type stars in visual binaries and discovered some previously unknown bright O-type stars. Further research has been conducted on systems with signs of spectroscopic binarity.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
J. Maiz Apellaniz, M. Pantaleoni Gonzalez, R. H. Barba
Summary: The study aims to characterize the uncertainties of Gaia EDR3 parallaxes in order to improve precision of derived distances. By reanalyzing calibration data and validating bias corrections, the research provides accurate distances to stars and clusters. The study suggests potential improvements for brighter magnitudes and emphasizes the importance of proper calibration for precise measurements.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
M. Pantaleoni Gonzalez, J. Maiz Apellaniz, R. H. Barba, B. Cameron Reed
Summary: The researchers successfully created a clean sample of massive stars in the solar neighborhood through cross-matching data, analyzed their distribution and distances, proposed a potential stellar structure, and discussed plans for future work.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
J. Maiz Apellaniz, M. Pantaleoni Gonzalez, R. H. Barba, M. Weiler
Summary: This study investigates the Bermuda cluster and its ejection events using Gaia EDR3 data. The results reveal three ejection events that have caused the cluster to lose over 200 solar masses. These events have significantly altered the cluster's mass function and are contributing to its expansion.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Miguel Vioque, Manuel Cavieres, Michelangelo Pantaleoni Gonzalez, Alvaro Ribas, Rene D. Oudmaijer, Ignacio Mendigutia, Lena Kilian, Hector Canovas, Michael A. Kuhn
Summary: Using the clustering algorithm HDBSCAN, we studied the clustering and association properties of 337 intermediate- and high-mass young stellar objects (YSOs) in the Gaia DR3 catalog. The results showed that the clustering rate of lower-mass YSOs was similar to that of T Tauri stars, while the clustering rate of intermediate-mass YSOs decreased with stellar mass. It was also found that massive YSOs often appeared clustered, but intermediate-mass YSOs did not frequently appear in the clusters around massive YSOs. Furthermore, the clustering properties of intermediate- and high-mass YSOs were negatively correlated with their disk emission and accretion rate.
ASTRONOMICAL JOURNAL
(2023)