Flux and color variations of the doubly imaged quasar UM673⋆
| Autor: | Eamonn Kerins, Luigi Mancini, Allan Hornstrup, Kailash C. Sahu, M. Hundertmark, Khalid Al-Subai, S. Proft, Martin Dominik, P. Browne, Jesper Skottfelt, S. Hardis, Stefan Dreizler, M. Zub, Olivier Wertz, M. Glitrup, François Finet, N. Kains, Timo Anguita, John Southworth, Jean Surdej, Matthew T. Penny, Sohrab Rahvar, Andrii Elyiv, F. Schönebeck, Colin Snodgrass, Tobias C. Hinse, T. Gerner, Valerio Bozza, Martin Burgdorf, R. W. Schmidt, G. Masi, Joachim Wambsganss, M. Mathiasen, K. B. W. Harpsøe, U. G. Jørgensen, F. Grundahl, F. Zimmer, Peter N. Dodds, Davide Ricci, S. Calchi Novati, S. Schäfer, Christina C. Thöne, C. Liebig, Gernot Maier, Gaetano Scarpetta |
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| Přispěvatelé: | Science & Technology Facilities Council, University of St Andrews. School of Physics and Astronomy |
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Point spread function
Cosmology and Nongalactic Astrophysics (astro-ph.CO) FOS: Physical sciences Color Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences law.invention Photometry (optics) Telescope Photometry photometric [techniques] Gravitational lenses techniques: photometric UM-673 Settore FIS/05 - Astronomia e Astrofisica Observatory law quasars: general quasars: individual: UM673 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics Variability 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics Physics general [quasars] gravitational lensing: strong 010308 nuclear & particles physics individual: UM673 [quasars] Astrophysics::Instrumentation and Methods for Astrophysics Astronomy and Astrophysics Quasar Spectral bands gravitational lensing strong quasars general techniques photometric individual UM673 Galaxies Galaxy Optical transfer function Space and Planetary Science strong [gravitational lensing] Time-delay Astrophysics::Earth and Planetary Astrophysics Astrophysics - Cosmology and Nongalactic Astrophysics |
| Zdroj: | Ricci, D, Elyiv, A, Finet, F, Wertz, O, Alsubai, K, Anguita, T, Bozza, V, Browne, P, Burgdorf, M, Calchi Novati, S, Dodds, P, Dominik, M, Dreizler, S, Gerner, T, Glitrup, M, Grundahl, F, Hardis, S, Harpsøe, K, Hinse, T C, Hornstrup, A, Hundertmark, M, Jørgensen, U G, Kains, N, Kerins, E, Liebig, C, Maier, G, Mancini, L, Masi, G, Mathiasen, M, Penny, M, Proft, S, Rahvar, S, Scarpetta, G, Sahu, K, Schäfer, S, Schönebeck, F, Schmidt, R, Skottfelt, J, Snodgrass, C, Southworth, J, Thöne, C C, Wambsganss, J, Zimmer, F, Zub, M & Surdej, J 2013, ' Flux and color variations of the doubly imaged quasar UM673⋆ ', Astronomy & Astrophysics, vol. 551, A104 . https://doi.org/10.1051/0004-6361/201118755 Ricci, D, Elyiv, A, Finet, F, Wertz, O, Alsubai, K, Anguita, T, Bozza, V, Browne, P, Burgdorf, M, Calchi Novati, S, Dodds, P, Dominik, M, Dreizler, S, Gerner, T, Glitrup, M, Grundahl, F, Hardis, S, Harpsøe, K, Hinse, T C, Hornstrup, A, Hundertmark, M, Jørgensen, U G, Kains, N, Kerins, E, Liebig, C, Maier, G, Mancini, L, Masi, G, Mathiasen, M, Penny, M, Proft, S, Rahvar, S, Scarpetta, G, Sahu, K, Schäfer, S, Schönebeck, F, Schmidt, R, Skottfelt, J, Snodgrass, C, Southworth, J, Thöne, C C, Wambsganss, J, Zimmer, F, Zub, M & Surdej, J 2013, ' Flux and color variations of the doubly imaged quasar UM673 ', Astronomy and Astrophysics, vol. 551, A104 . https://doi.org/10.1051/0004-6361/201118755 Astronomy & Astrophysics |
| DOI: | 10.1051/0004-6361/201118755 |
| Popis: | With the aim of characterizing the flux and color variations of the multiple components of the gravitationally lensed quasar UM673 as a function of time, we have performed multi-epoch and multi-band photometric observations with the Danish 1.54m telescope at the La Silla Observatory. The observations were carried out in the VRi spectral bands during four seasons (2008--2011). We reduced the data using the PSF (Point Spread Function) photometric technique as well as aperture photometry. Our results show for the brightest lensed component some significant decrease in flux between the first two seasons (+0.09/+0.11/+0.05 mag) and a subsequent increase during the following ones (-0.11/-0.11/-0.10 mag) in the V/R/i spectral bands, respectively. Comparing our results with previous studies, we find smaller color variations between these seasons as compared with previous ones. We also separate the contribution of the lensing galaxy from that of the fainter and close lensed component. 7 pages, 8 figures, 4 tables |
| Databáze: | OpenAIRE |
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