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Preprint Oct 2026

NGC 6426: Colour-Magnitude diagram and variable star population as indicators of metallicity, distance, and age

We present new VI CCD photometry of the globular cluster NGC 6426. The membership status of all point sources and, in particular, of all the variables in the field of view is discussed, including four recently detected variables. The double mode nature of variables V3 and V9 is confirmed and their periods are calculate...

A. Ferro, R. Michel, D. Deras et al. · 0 citations
Review Sep 2026

Multi-Band Optical Variability Characteristics of the $\gamma$-ray emitting blazar 1ES 0647+250 during its 2020 flare

We present a multi-band optical variability study of the $\gamma$-ray emitting high-synchrotron-peaked blazar 1ES~0647+250 during its enhanced optical activity in 2020. The analysis utilizes 107 epochs of high-precision $B$, $V$, and $R$-band photometry obtained with the 75 cm telescope at the Vainu Bappu Observatory,...

K. Pandian, C. .. Stalin, S. Muneer et al. · 0 citations
Review Oct 2026

A Novel Approach to Identify Unseen Companions: An In-Depth study of GDR3 220_28

Emission lines in the spectrum and the excess seen in the spectral energy distribution (SED) at infrared (IR) wavelengths serve as crucial indicators of accretion activity and the presence of gas and dust in the circumstellar environment of a young star. As accretion ceases over several million years, the H$\alpha$ emi...

T. B. Cysil, Blesson Mathew, B. Shridharan et al. · 0 citations

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