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UBVR and spectroscopic observations of CI Cam
Photoelectric (UBVR) observations in 1998-2001 and medium-resolution spectroscopy obtained in the SAO in the same period for the B[e]/X-ray transient CI Cam display cyclic... -
Photometry and polarimetry of Ae star VV Ser
Results of long-term photometric and polarimetric observations of the classical Herbig Ae star VV Ser, performed at the Crimean Astrophysical Observatory as part of a program of... -
Variability of Cyg X-1 in 1994-1998
Photoelectric UBVR photometry of Cyg X-1 obtained during the coordinated international campaign 'Optical Monitoring of Unique Astrophysical objects', carried out in... -
Photopolarimetric activity of SV Cep
The results of the eleven-years (1987-98) photopolarimetric patrol observations of Herbig Ae star SV Cep are presented. Only one deep brightness minimum of star were observed... -
UBVJHKLM Photometry of Nova Cygni 1992
The results of photometric UBVJHKLM observations of Nova Cygni 1992 performed from the 83d until the 290th day after the nova outburst are presented. The accuracy of the... -
IUE survey of H I Ly{alpha} absorption. I.
We measure Galactic interstellar neutral hydrogen column densities by analyzing archival interstellar Ly{alpha} absorption line data toward 554 B2 and hotter stars observed at... -
MC massive stars IMF. I.
UBV CCD photometry has been obtained for 14 OB associations in the Magellanic Clouds using the University of Toronto's 0.6m telescope and the Carnegie Institution of... -
Blue and red supergiants in M33
We present a catalog of blue and red stars in M33 based on photographic photometry of over 65,000 objects extracted from plates taken with the 3.6m Canada-France-Hawaii... -
UBV and H-beta in Sco-Cen association
As part of a thorough study of the luminosity function of Sco-Cen, UBV, and H_{beta} photometry has been acquired for a large number of mid B- to late A-type stars which are... -
Sp. follow-up of low-metallicity S-PLUS stars
This work presents the medium-resolution (R~1500) spectroscopic follow-up of 522 low-metallicity star candidates from the Southern Photometric Local Universe Survey (S-PLUS).... -
NGT gri monitoring of the FSRQ 3C 454.3
Based on the database monitored by the 1.26m National Astronomical Observatory-Guangzhou University Infrared/Optical Telescope, we studied the optical variabilities of FSRQ... -
Phot. metallicity prediction of RR Lyrae stars
RR Lyrae stars are useful chemical tracers thanks to the empirical relationship between their heavy-element abundance and the shape of their light curves. However, the... -
SMUDGes. III. The Southern catalog
We present a catalog of 5598 ultra-diffuse galaxy (UDG) candidates with effective radius r_e_>5.3" distributed throughout the southern portion of the DESI Legacy Imaging... -
Dwarf irregular galaxy Leo A. II. R and Ha obs.
We have surveyed the complete extent of Leo A, which is an apparently isolated Local Group dwarf irregular galaxy, in B, V, R, I (the Johnson-Cousins system), and NA656... -
DES Bright Arcs Survey: strong lens systems
We report the combined results of eight searches for strong gravitational lens systems in the full 5000 square degrees of Dark Energy Survey (DES) observations. The observations... -
SHELLQs. XVI. New quasars at 5.8<z<7
We present the spectroscopic discovery of 69 quasars at 5.8<z<7.0, drawn from the Hyper Suprime-Cam (HSC) Subaru Strategic Program (SSP) imaging survey data. This is the... -
The COSMOS2020 catalog
The Cosmic Evolution Survey (COSMOS) has become a cornerstone of extragalactic astronomy. Since the last public catalog in 2015, a wealth of new imaging and spectroscopic data... -
SMUDGes. II. Expanded survey & Stripe 82 cat.
We present 226 large ultra-diffuse galaxy (UDG) candidates (r_e_>5.3, {mu}0,g>24mag/arcsec^2^) in the SDSS Stripe 82 region recovered using our improved procedure... -
V and R -band light curves of BZCAT blazars
In an optical monitoring program to characterize the variability properties of blazars, we observed 10 sources from the Roma-BZCAT catalog for 26 nights in V and R bands during... -
Multiwavelength obs. of Miras in the LMC
We comprehensively study the variability of Miras in the Large Magellanic Cloud by simultaneously analyzing light curves in 14 bands in the range of 0.5-24{mu}m. We model over...
