Browsing by Author "XX644846"

Now showing items 1-18 of 18

    • An all-sky set of (B) − V − R photometric calibrators for Schmidt surveys 
      Bucciarelli, B.; García Yus, J.; Casalegno, R.; Postman, M.; Lasker, B. M.; Sturch, C.; Lattanzi, M. G.; McLean, B. J.; Costa Hechenleitner, Edgardo; Falasca, A.; Le Poole, R.; Massone, G.; Potter, M.; Rosenberg, A.; Borgman, T.; Doggett, J.; Morrison, J.; Pizzuti, A.; Pompei, E.; Rehner, D.; Siciliano, L.; Wolfe, D. (2001)
      We publish 622 CCD photometric sequences in the Johnson-Kron-Cousins standard system, distributed both in the northern and southern hemispheres, useful for the calibration of photographic photometry of Schmidt survey ...
    • BVRI light curves for 29 type Ia supernovae 
      Hamuy Wackenhut, Mario; Phillips, M. M.; Suntzeff, Nicholas B.; Schommer, R. A.; Maza Sancho, José; Antenaza, Roberto; Wischnjewsky, Marina; Valladares, Geraldo; Muena, César; González, L. E.; Avilés, R.; Wells, Lisa; Smith, R. C.; Navarrete, Mauricio; Covarrubias, Ricardo; Williger, G.; Walker, Alistair R.; Layden, A. C.; Elias, J. H.; Baldwin, J. A.; Hernández, Manuel; Tirado, Hernán; Ugarte, Patricio; Elston, R.; Saavedra, Nelson; Barrientos, Felipe; Costa Hechenleitner, Edgardo; Lira Teillery, Paulina; Ruiz González, María Teresa; Anguita, Claudio; Gómez, Ximena; Ortiz, P.; Della Valle, M.; Danziger, J.; Storm, J.; Kim, Y. C.; Bailyn, C.; Rubenstein, Eric P.; Tucker, D.; Cersosimo, S.; Méndez Bussard, René Alejandro; Siciliano, L.; Sherry, W.; Chaboyer, Brian; Koopmann, R. A.; Geisler, D.; Sarajedini, A.; Dey, Arjun; Tyson, N.; Rich, R. Michael; Gal, R.; Lamontagne, Robert; Caldwell, N.; Guhathakurta, Puragra; Phillips, A. C.; Szkody, P.; Prosser, C.; Ho, Luis C.; McMahan, R.; Baggley, G.; Cheng, K. P.; Havlen, R.; Wakamatsu, K.; Janes, Kenneth A.; Malkan, Mathew; Baganoff, F.; Seitzer, P.; Shara, M.; Sturch, C.; Hesser, J.; Hartigan, P.; Hughes, J.; Welch, D. L.; Williams, T. B.; Ferguson, H.; Francis, P. J.; French, L.; Bolte, M.; Roth, J.; Odewahn, S.; Howell, S.; Krzeminski, W. (American Astronomical Society, 1996-12)
      BV(RI)_KC_ light curves are presented for 27 type Ia supernovae discovered during the course of the Calan/Tololo Survey and for two other SNe Ia observed during the same period. Estimates of the maximum light magnitudes ...
    • BVRI light curves for 29 type Ia supernovae 
      Hamuy Wackenhut, Mario; Phillips, M. M.; Suntzeff, Nicholas B.; Schommer, R. A.; Maza Sancho, José; Antenaza, Roberto; Wischnjewsky, Marina; Valladares, Geraldo; Muena, César; González, L. E.; Avilés, R.; Wells, Lisa; Smith, R. C.; Navarrete, Mauricio; Covarrubias, Ricardo; Williger, G.; Walker, Alistair R.; Layden, A. C.; Elias, J. H.; Baldwin, J. A.; Hernández, Manuel; Tirado, Hernán; Ugarte, Patricio; Elston, R.; Saavedra, Nelson; Barrientos, Felipe; Costa Hechenleitner, Edgardo; Lira Teillery, Paulina; Ruiz González, María Teresa; Anguita, Claudio; Gómez, Ximena; Ortiz Arce, Patricio; Della Valle, Massimo; Danziger, J.; Storm, J.; Kim, Y. C.; Bailyn, C.; Rubenstein, Eric P.; Tucker, D.; Cersosimo, S.; Méndez, R. A.; Siciliano, L.; Sherry, W.; Chaboyer, Brian; Koopmann, R. A.; Geisler, D.; Sarajedini, A.; Dey, Arjun; Tyson, N.; Rich, R. Michael; Gal, R.; Lamontagne, Robert; Caldwell, N.; Guhathakurta, Puragra; Phillips, A. C.; Szkody, P.; Prosser, C.; Ho, Luis C.; McMahan, R.; Baggley, G.; Cheng, K. P.; Havlen, R.; Wakamatsu, K.; Janes, Kenneth A.; Malkan, Mathew; Baganoff, F.; Seitzer, P.; Shara, M.; Sturch, C.; Hesser, J.; Hartigan, P.; Hughes, J.; Welch, D. L.; Williams, T. B.; Ferguson, H.; Francis, P. J.; French, L.; Bolte, M.; Roth, J.; Odewahn, S.; Howell, S.; Krzeminski, W. (American Astronomical Society, 1996-12)
      BV(RI)_KC_ light curves are presented for 27 type Ia supernovae discovered during the course of the Calan/Tololo Survey and for two other SNe Ia observed during the same period. Estimates of the maximum light magnitudes ...
    • CTQ 839: Candidate for the smallest projected separation binary quasar 
      Morgan, Nicholas D.; Burley, Greg; Costa Hechenleitner, Edgardo; Maza Sancho, José; Persson, S. E.; Ruiz González, María Teresa; Schechter, Paul L.; Thompson, Ian; Winn, Joshua N. (2000-03)
      We report the discovery of the new double quasar CTQ 839. This B\18.3, radio-quiet quasar pair is separated by 2A.1 in BRI and H Ðlters, with magnitude di erences of *mB\2.5, *mR\*mI\1.9, and *mH\2.3. Spectral observations ...
    • IUE and Optical Spectra of AL Comae Berenices During a Rare Superoutburst 
      Szkody, P.; Silber, Andrew; Sion, Ed; Downes, Ronald A.; Howell, Steve B.; Costa Hechenleitner, Edgardo; Moreno, H. (1996-06)
      We present optical spectra from 3 to 21 days and lUE spectra at 10 and 19 days following the outburst of the extreme amplitude, very short orbital period cataclysmic variable AL Corn after a 20 yr quiescent interval. The ...
    • Kinematical and Chemical Vertical Structure of the Galactic Thick Disk 
      Moni Bidin, Christian (Universidad de ChilePrograma Cybertesis, 2009)
    • El Movimiento Propio Absoluto de la Nube Grande de Magallanes 
      Moyano D'Angelo, Maximiliano Leonardo (Universidad de Chile, 2007)
      Se ha usado el telescopio Dupont de 2.5m en el observatorio de Las Campanas, para determinar el movimiento propio absoluto de la Nube Grande de Magallanes (LMC) con respecto a un quasar de fondo. Entre los a˜nos 2001 y ...
    • New S Stars Found in a Southern Galactic Plane Survey 
      MacConnell, D. Jack; Wing, Robert F.; Costa Hechenleitner, Edgardo (The Astronomical Society of the PaciÐc., 2013-01-21)
      Based upon the presence of bands of ZrO and LaO, four new S stars have been identified. They were found among more than 700 red spectrograms of cool stars in a survey of the southern Galactic plane.
    • NGC 6404 and 6583: two neglected intermediate-age open clusters located in the Galactic Centre direction 
      Carraro, Giovanni; Méndez Bussard, René Alejandro; Costa Hechenleitner, Edgardo (2005)
      We report on VI charge-coupled device photometry of two fields centred in the region of the open clusters NGC 6404 and 6583 down to V = 22.0. So far these clusters have never been studied, and we provide for the first time ...
    • On the assessment of the nature of open star clusters and the determination of their basic parameters with ... 
      Carraro, Giovanni; Baume, Gustavo; Seleznev, Anton F.; Costa Hechenleitner, Edgardo (Springer, 2017)
      Our knowledge of stellar evolution and of the structure and chemical evolution of the Galactic disk largely builds on the study of open star clusters. Because of their crucial role in these relevant topics, large ...
    • Photometry of the five marginally studied open clusters Collinder 74, Berkeley 27, Haffner 8, NGC 2509, and ... 
      Carraro, Giovanni; Costa Hechenleitner, Edgardo (2007)
      Context. The stellar populations in the outer Galactic disk are a subject of wide interest nowadays. To contribute to a better picture of this part of the Galaxy, we have studied the nature of five marginally investigated ...
    • Properties of the open cluster Tombaugh 1 from high resolution spectroscopy and uvbyCaH beta photometry 
      Sales Silva, João V.; Carraro, Giovanni; Anthony Twarog, Barbara; Moni Bidin, Christian; Costa Hechenleitner, Edgardo; Twarog, Bruce A. (IOP Publishing, 2016)
      Open clusters can be the key to deepening our knowledge on various issues involving the structure and evolution of the Galactic disk and details of stellar evolution because a cluster's properties are applicable to all its ...
    • Red supergiants in the southern Milky Way. I - Search and classification techniques 
      MacConnell, D. Jack; Wing, Robert F.; Costa Hechenleitner, Edgardo (American Astronomical Society, 1992-08)
      A detailed description of a continuing survey for distant, cool supergiants near the Galactic plane in the southern hemisphere is presented. Candidate stars are found on near-IR objective-prism plates, and confirming ...
    • The solar neighborhood. VII. Discovery and characterization of nearby multiples in the Ctio parallax investigation 
      Jao, Wei-Chun; Henry, Todd J.; Subasavage, John P.; Bean, Jacob L.; Costa Hechenleitner, Edgardo; Lanna, Philip A.; Méndez Bussard, René Alejandro (The American Astronomical Society, 2003-01)
      We report the discovery of eight new multiple star systems among 191 stellar systems targeted for parallax determinations in the RECONS (Research Consortium on Nearby Stars) southern parallax program, CTIOPI (Cerro Tololo ...
    • The solar neighborhood. XVII. Parallax results from the CTIOPI 0.9 m program: 20 new members of the recons ... 
      Henry, Todd J.; Jao, Wei Chun; Subasavage, John P.; Beaulieu, Thomas D.; Ianna, Philip A.; Costa Hechenleitner, Edgardo; Méndez Bussard, René Alejandro (The Astronomical Journal, 132:2360–2371, 2006 December, 2006)
      Astrometric measurements for 25 red dwarf systems are presented, including the first definitive trigonometric parallaxes for 20 systems within 10 pc of the Sun, the horizon of the RECONS sample. The three nearest systems ...
    • Speckle Interferometry at SOAR in 2019 
      Tokovinin, Andrei; Mason, Brian D.; Méndez Bussard, René A.; Costa Hechenleitner, Edgardo; Horch, Elliott P. (IOP Publishing, 2020)
      The results of speckle-interferometric observations at the 4.1 m Southern Astrophysical Research Telescope in 2019 are given, totaling 2555 measurements of 1972 resolved pairs with separations from 15 mas (median 021) and ...
    • Stellar populations in the Carina region The Galactic plane at l=291 degrees 
      Molina-Lera, J.; Baume, G.; Gamen, R.; Costa Hechenleitner, Edgardo; Carraro, Giovanni (EDP Sciences, 2016-08)
      Context. Previous studies of the Carina region have revealed its complexity and richness as well as a significant number of early-type stars. However, in many cases, these studies only concentrated on the central region ...
    • Three active M dwarfs within 8 pc: L 449-1, L 43-72, and LP 949-15 
      R.-D, Scholz; Lo Curto, G.; Méndez Bussard, René Alejandro; Hambaryan, V.; Costa Hechenleitner, Edgardo; Henry, T. J.; Schwope, A. D. (ESO, 2005)
      Three nearby star candidates were selected as bright 2MASS point sources without associated optical sources, i.e. with potentially large proper motions, subsequently confirmed by multi-epoch optical data from the SuperCOSMOS ...