4 papers
SN 2025aico: Early observations of a faint Type IIb supernova with a low-mass envelope
J. -W. Zhao, A. Pastorello, B. Kumar +45
We aimed to investigate the physical properties and the underlying explosion mechanisms of the Type IIb SN 2025aico. Through a comprehensive analysis of early-phase optical light c…
Spectroscopic characterization of a remarkable temporally varying, triple-lensed quasar at z=2.67
Charlie Lind-Thomsen, Kasper E. Heintz, Albert Sneppen +5
Gravitationally lensed quasars are viable cosmic tools for constraining a diversity of fundamental astrophysical phenomena; They enable identification of faint, low-mass supermassi…
Phase-resolved optical spectroscopy of the rapidly varying white dwarf ZTF 1851+1714
C. C. Pedersen, M. R. M. Knudsen, K. Valeckas +3
We report on phase-resolved optical spectroscopy and photometry in the R and B bands of the white dwarf candidate ZTF 185139.81+171430.3. The source has been reported to be variabl…
PyLongslit: a simple manual Python pipeline for processing of astronomical long-slit spectra recorded with CCD detectors
Kostas Valeckas, Johan Peter Uldall Fynbo, Jens-Kristian Krogager +1
We present a new Python pipeline for processing data from astronomical long-slit spectroscopy observations recorded with CCD detectors. The pipeline is designed to aim for simplici…