Results 71 to 80 of about 53,340 (257)

A cross-calibration between Tycho-2 photometry and HST spectrophotometry [PDF]

, 2005
I show that Tycho-2 photometry and HST spectrophotometry are accurate and stable enough to obtain a precise cross-calibration by analyzing a well-calibrated sample of 256 stars observed with both Hipparcos and HST. Based on this analysis, I obtain the following photometric zero points in the Vega magnitude system for Tycho-2: 0.020+-0.001 (B_T-V_T), 0 ...
arxiv   +1 more source

HFF-DeepSpace photometric catalogs of the 12 Hubble frontier fields, clusters, and parallels : photometry, photometric redshifts, and stellar masses [PDF]

, 2018
We present Hubble multi-wavelength photometric catalogs, including (up to) 17 filters with the Advanced Camera for Surveys and Wide Field Camera 3 from the ultra-violet to near-infrared for the Hubble Frontier Fields and associated parallels.
Brammer, Gabriel B, Feinstein, Adina D, Ferrarese, Laura, Kado-Fong, Erin, Labbé, Ivo, Lange-Vagle, Daniel, Lundgren, Britt, Marchesini, Danilo, Martis, Nicholas, Muzzin, Adam, Nedkova, Kalina, Oesch, Pascal A, Shipley, Heath V, Skelton, Rosalind, Stefanon, Mauro, van der Wel, Arjen, Whitaker, Katherine E   +16 more
core   +4 more sources

JWST Insight into a Lensed HST-dark Galaxy and Its Quiescent Companion at z = 2.58

The Astrophysical Journal Letters, 2023
Using the novel James Webb Space Telescope (JWST)/NIRCam observations in the A2744 field, we present a first spatially resolved overview of a Hubble Space Telescope (HST)-dark galaxy, spectroscopically confirmed at z = 2.58 with magnification μ ≈ 1.9 ...
Vasily Kokorev, Shuowen Jin, Georgios E. Magdis, Karina I. Caputi, Francesco Valentino, Pratika Dayal, Maxime Trebitsch, Gabriel Brammer, Seiji Fujimoto, Franz Bauer, Edoardo Iani, Kotaro Kohno, David Blánquez Sesé, Carlos Gómez-Guijarro, Pierluigi Rinaldi, Rafael Navarro-Carrera   +15 more
doaj   +1 more source

CLASH: Photometric redshifts with 16 HST bands in galaxy cluster fields [PDF]

, 2013
The Cluster Lensing And Supernovae survey with Hubble (CLASH) is an Hubble Space Telescope (HST) Multi-Cycle Treasury program observing 25 massive galaxy clusters.
Balestra, I., Bartelmann, M., Benìtez, N., Bouwens, R., Bradley, L., Broadhurst, T., Coe, D., Donahue, M., Ford, H., Fritz, A., Graves, G., Grillo, C., Host, O., Infante, L., Jimenez-Teja, Y., Jouvel, S., Kelson, D., Koekemoer, A. M., Lahav, O., Lazkoz, R., Lemze, D., Medezinski, E., Melchior, P., Meneghetti, M., Mercurio, A., Merten, J., Molino, A., Moustakas, J., Moustakas, L., Nonino, M., Ogaz, S., Postman, M., Rosati, P., Scodeggio, M., Seitz, S., Umetsu, K., Zheng, W., Zitrin, A.   +37 more
core   +3 more sources

SYMBIOTIC NOVA V1016 CYG AS INTERACTING BINARY

Odessa Astronomical Publications, 2017
Long-term UBV photoelectric and photographic photometry of the symbiotic nova V1016 Cyg is discussed. The pre-outburst brightening in 1949, main nova-like outburst in 1964 and two small brightenings in 1980 and 1994 suggest 15.1 ± 0.2 years period of ...
S. Parimucha, D. Chochol, T. Pribulla
doaj   +1 more source

Absolute Flux Calibration of the IRAC Instrument on the Spitzer Space Telescope using Hubble Space Telescope Flux Standards [PDF]

, 2011
The absolute flux calibration of the James Webb Space Telescope will be based on a set of stars observed by the Hubble and Spitzer Space Telescopes. In order to cross-calibrate the two facilities, several A, G, and white dwarf (WD) stars are observed ...
A. Noriega-Crespo, Aldering, Asplund, Aufdenberg, Bessel, Bohlin, Bohlin, Bohlin, Bohlin, Bohlin, Bohlin, Bohlin, Bohlin, Bohlin, C. Engelbracht, Castelli, Cohen, Cohen, Cohen, D. Ardila, De Jong, De Marchi, Engelke, Fazio, Finley, G. H. Rieke, Gianninas, Gilliland, H. C. Ferguson, Hayes, Houck, J. Kalirai, K. D. Gordon, K. Flanagan, K. Y. L. Su, Kaiser, Kent, Koornneef, M. Meixner, Maíz Apellániz, Megessier, P.-E. Tremblay, Price, R. C. Bohlin, Rieke, Rieke, Rieke, S. Carey, S. Deustua, Smith, Su, Tremblay, Werner   +52 more
core   +2 more sources

On the nature of the progenitors of three type II-P supernovae: 2004et, 2006my and 2006ov

, 2010
The pre-explosion observations of the type II-P supernovae 2006my, 2006ov and 2004et, are re-analysed. In the cases of supernovae 2006my and 2006ov we argue that the published candidate progenitors are not coincident with their respective supernova sites
Crockett, R. M., Eldridge, J. J., Mattila, S., Maund, J. R., Pastorello, A., Smartt, S. J., Stephens, A. W.   +6 more
core   +1 more source

The “Canonical” White Dwarf Cooling Sequence of M5

The Astrophysical Journal, 2023
Recently, slowly cooling white dwarfs (WDs) are a new class of WD that have been identified in two globular clusters (namely M13 and NGC 6752), showing a horizontal branch (HB) morphology with an extended blue tail.
Jianxing Chen, Francesco R. Ferraro, Maurizio Salaris, Mario Cadelano, Barbara Lanzoni, Cristina Pallanca, Leandro G. Althaus, Santi Cassisi   +7 more
doaj   +1 more source

HST Observations of M Subdwarfs [PDF]

, 2000
We present the results of an HST snapshot program to search for very-low-mass stellar companions to nearby M subdwarfs. None of our nine targetted metal-poor primaries have companions more massive than the hydrogen burning limit, implying that the halo binary fraction is equal to or less than the Galactic disk binary fraction below 0.3 M_sun.
arxiv   +1 more source

Resolving stellar populations with integral field spectroscopy

Astronomische Nachrichten, Volume 340, Issue 9-10, Page 989-995, November‐December 2019., 2019
Abstract High‐performance instruments at large ground‐based telescopes have made integral field spectroscopy (IFS) a powerful tool for the study of extended objects such as galaxies, nebulae, or even larger survey fields on the sky. Here, we discuss the capabilities of IFS for the study of resolved stellar populations, using the new method of point ...
Martin M. Roth, Peter M. Weilbacher, Norberto Castro   +2 more
wiley   +1 more source