Now showing items 1-20 of 52

    • 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 ...
    • Basic parameters of three star clusters in the Small Magellanic Cloud: Kron 11, Kron 63 and NGC 121 

      Baume, Gustavo; Noel, Noelia E. D.; Costa Hechenleitner, Edgardo; Carraro, Giovanni; Méndez Bussard, René Alejandro; Pedreros, M. H. (BLACKWELL, 2008-11-11)
      We present observations for three star clusters, Kron 11, Kron 63 and NGC 121, in the Small Magellanic Cloud. We have studied their structure and derived their fundamental parameters by means of their luminosity functions, ...
    • Breaking the curtain: the old open cluster VdB-Hagen 67 in the background of the Vela Molecular Ridge 

      Carraro, Giovanni; Costa Hechenleitner, Edgardo (2010)
      We present optical and infrared photometry for VdB-Hagen 67, an overlooked old open cluster located at l = 273.◦76, b = −0.◦375 (RA 09h26m45s, Dec.−51◦16 00 , J2000.0) in the fourth Galactic quadrant, in the direction ...
    • 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, 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 ...
    • 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 ...
    • Carbon Stars in the Large Magellanic Cloud: Luminosities, Colors, and Implications for the History of Star Formation 

      Costa Hechenleitner, Edgardo; Frogel, Jay A. (1996-12)
      We present RI and JHK photometry for 888 and 204 carbon (C) stars, respectively, of the 1035 C stars found by Blanco and his collaborators in 52 fields of the Large Magellanic Cloud (LMC). The results of our analysis of ...
    • CCD astrometry of faint compact extragalactic radio sources 

      Costa Hechenleitner, Edgardo; Loyola, P. (1999-10-02)
      Optical positions relative to the Hipparcos Catalogue (ESA 1997) have been obtained for the optical counterparts of 15 faint (B 20 − 23) southern compact extragalactic radio sources (CERS). Most of these sources are ...
    • CCD astrometry of faint compact extragalactic radio sources. II. 

      Costa Hechenleitner, Edgardo (2001)
      Optical positions relative to the Hipparcos Catalogue (ESA 1997) have been obtained for the optical counterparts of 28 faint (B 20−23) southern compact extragalactic radio sources (CERS). Most of these sources are not ...
    • CCD astrometry of faint compact extragalactic radio sources. III. 

      Costa Hechenleitner, Edgardo (2002)
      Optical positions relative to the Hipparcos Catalogue (ESA 1997) have been obtained for the optical counterparts of 38 faint (B 20−24) southern compact extragalactic radio sources (CERS). Many of these sources are not ...
    • The chemical enrichment history of the small magellanic cloud and its gradients 

      Carrera, Ricardo; Gallart, Carme; Aparicio, Antonio; Costa Hechenleitner, Edgardo; Méndez Bussard, René Alejandro; Noel, Noelia E. D. (IOP PUBLISHING, 2008-09)
      We present stellar metallicities derived from Ca II triplet spectroscopy in over 350 red giant branch stars in 13 fields distributed in different positions in the Small Magellanic Cloud, ranging from similar to 1 degrees ...
    • 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 ...
    • Extended star formation history of the star cluster NGC 2154 in the Large Magellanic Cloud 

      Baume, Gustavo; Carraro, Giovanni; Costa Hechenleitner, Edgardo; Méndez Bussard, René Alejandro; Girardi, L. (2007)
      The colour–magnitude diagram (CMD) of the intermediate-age Large Magellanic Cloud star cluster NGC 2154 and its adjacent field has been analysed using Padova stellar models to determine the cluster’s fundamental parameters ...
    • High proper motion stars with declinations between −30° and −40° , and right ascensions between 00 h and 10 h 40m 

      Wroblewski Cruz, Herbert; Costa Hechenleitner, Edgardo (2001)
      Proper motions, positions, nding charts and magnitudes are given for 147 newly discovered stars with proper motions larger than 0.15 arcsec/year. They were found in a search for high proper motion stars carried out in ...
    • Homogeneous photometry and star counts in the field of 9 Galactic star clusters 

      Seleznev, A. F.; Carraro, Giovanni; Costa Hechenleitner, Edgardo; Loktin, A. V. (Elsevier B.V., 2009-05-28)
      We present homogeneous V, I CCD photometry of nine stellar fields in the two inner quadrants of the Galactic plane. The lines-of-view to most of these fields aim in the direction of the very inner Galaxy, where the ...
    • Homogeneous photometry and star counts in the field of 9 Galactic star clusters 

      Seleznev, A. F.; Carraro, Giovanni; Costa Hechenleitner, Edgardo; Loktin, A. V. (ELSEVIER, 2010)
      We present homogeneous V, I CCD photometry of nine stellar fields in the two inner quadrants of the Galactic plane. The lines-of-view to most of these fields aim in the direction of the very inner Galaxy, where the ...
    • Insights into the properties of the Local (Orion) spiral arm. NGC 2302: First results and description of the program 

      Costa Hechenleitner, Edgardo; Moitinho, André; Radiszcz Sotomayor, Matías Cristóbal; Muñoz Vidal, Ricardo Rodrigo; Carraro, Giovanni; Vázquez, Rubén A.; Servajean Bergoeing, Elise (EDP Sciences, 2015)
      Context. Infrared dark clouds are the coldest and densest portions of giant molecular clouds. The most massive ones represent some of the most likely birthplaces for the next generation of massive stars in the Milky Way. ...
    • 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)
    • The metallicity of the open cluster Tombaugh 2 

      Villanova, S.; Randich, S.; Geisler, D.; Carraro, Giovanni; Costa Hechenleitner, Edgardo (2010)
      Context. Open clusters are excellent tracers of the structure, kinematics, and chemical evolution of the disk and a wealth of information can be derived from the spectra of their constituent stars. Aims. We investigate ...
    • The metallicity of the open cluster Tombaugh 2* 

      Villanova, S.; Randich, S.; Geisler, D.; Carraro, Giovanni; Costa Hechenleitner, Edgardo (ESO, 2010)
      Context. Open clusters are excellent tracers of the structure, kinematics, and chemical evolution of the disk and a wealth of information can be derived from the spectra of their constituent stars. Aims. We investigate ...