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Photometric and Spectroscopic study of TY Gru
We have conducted a photometric and high-resolution spectroscopic analysis of the high-latitude (l=1{deg}, b=-55{deg}) metal-poor RR Lyrae star TY Gru (=CS 22881-071). We find... -
alpha Persei and Praesepe Clusters
Two hundred forty-two members of the Praesepe and alpha Persei clusters have been surveyed with high angular resolution 2.2{mu}m speckle imaging on the 3m Infrared Telescope... -
DIRECT variables in M33B field
DIRECT is a project to obtain directly the distances to two Local Group galaxies, M31 and M33, which occupy a crucial position near the bottom of the cosmological distance... -
Radii of 22 galactic Cepheids
We present radial velocity data for 22 galactic Cepheid stars obtained with Coravel spectrometer. Continuous observation over several years has enabled us to obtain 852... -
Pulsation of galactic long-period variables
The absolute K magnitudes and kinematic parameters of about 350 oxygen-rich Long-Period Variable stars are calibrated, by means of an up-to-date maximum-likelihood method, using... -
Catalogue and Bibliography of UV Cet stars
This new catalogue of flare stars includes 463 objects. It contains astrometric, spectral and photometric data as well as information on the infrared, radio and X-ray properties... -
1975-1995 V1794 Cyg UBVRI photometry
Six years of new photometry of V 1794 Cyg is combined with the previously published data. These data are processed into two decades of homogeneous standard Johnson UBVRI... -
Stellar variability towards Galactic Bulge
The Table "stars.dat" contains the catalogue of variable stars discovered and/or observed for the 12 low-extinction fields towards the galactic bulge, with the IAG/USP Meridian... -
The Optical Spectrum of RR Tel
The symbiotic nova RR Telescopii has been observed with the 3.9 m telescope at the Anglo-Australian Observatory (AAO), using the University College London Echelle Spectrograph... -
DQ Cephei amplitude variations
A period analysis of the data obtained in six nights of differential photoelectric photometry of the {delta} Scuti star DQ Cephei (about 42 hours) confirms the pulsation modes... -
uvby photometry of 4 CP stars
Differential Stroemgren uvby photometry obtained with the Four College Automated Photoelectric Telescope shows that the hot HgMn star 33 Gem is photometrically constant. The Si... -
New variable chemically peculiar stars
Since variability of chemically peculiar (CP) stars plays an important role for the astrophysical explanation of their outstanding behaviour, we have identified new variable CP... -
Delta Sct stars: a new revised list
An extensive and up to date list of delta Sct stars is presented. This catalogue is intended to be a comprehensive review of observational characteristics of all the delta Sct... -
Photometry of luminous blue variables
An extensive photometric dataset has been compiled for six Luminous Blue Variables (LBVs). The dataset comprises published and unpublished measurements in the Stroemgren, Geneva... -
RR Lyr stars of ome Cen
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Variability of CP stars
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Distance catalogue for AGB stars
Estimating the distances to asymptotic giant branch (AGB) stars using optical measurements of their parallaxes is not straightforward because of the large uncertainties... -
NGC4631 luminous red nova AT 2021biy light curves
We present an observational study of the luminous red nova (LRN) AT 2021biy in the nearby galaxy NGC 4631. The field of the object was routinely imaged during the pre-eruptive... -
VRI photometry of IC5070 variable stars
We observed a field of 16'x16' in the star-forming region Pelican Nebula (IC 5070) at BVRI wavelengths for 90 nights spread over one year in 2012-2013. More than 250 epochs in... -
HR4796A dust ring Stokes images
The scattering properties of the dust originating from debris discs are still poorly known. The analysis of scattered light is however a powerful remote-sensing tool to...
