1. A systematically selected sample of luminous, long-duration, ambiguous nuclear transientsP. Wiseman, R. D. Williams, I. Arcavi, L. Galbany, M. J. Graham, S. Hönig, M. Newsome, B. Subrayan, Mark Sullivan, Tanja Petrushevska, 2025, izvirni znanstveni članek Opis: ABSTRACT
We present a search for luminous long-duration ambiguous nuclear transients (ANTs) similar to the unprecedented discovery of the extreme ambiguous event AT2021lwx with a $\gt 150$ d rise time and luminosity $10^{45.7}$ erg s$^{-1}$. We use the Lasair transient broker to search Zwicky Transient Facility (ZTF) data for transients lasting more than one year and exhibiting smooth declines. Our search returns 59 events, 7 of which we classify as ANTs assumed to be driven by accretion onto supermassive black holes. We propose the remaining 52 are stochastic variability from regular supermassive black hole accretion rather than distinct transients. We supplement the seven ANTs with three nuclear transients in ZTF that fail the light curve selection but have clear single flares and spectra that do not resemble typical active galactic nucleus. All of these 11 ANTs have a mid-infrared flare from an assumed dust echo, implying the ubiquity of dust around the black holes giving rise to ANTs. No events are more luminous than AT2021lwx, but one (ZTF19aamrjar) has twice the duration and a higher integrated energy release. On the other extreme, ZTF20abodaps reaches a luminosity close to AT2021lwx with a rise time $\lt 20$ d and that fades smoothly in $\gt 600$ d. We define a portion of rise-time versus flare amplitude space that selects ANTs with $\sim 50$ per cent purity against variable AGNs. We calculate a volumetric rate of $\gtrsim 3\times 10^{-11}$ Mpc$^{-1}$ yr$^{-1}$, consistent with the events being caused by tidal disruptions of intermediate and high-mass stars. Ključne besede: tidal disruption events, accretion Objavljeno v RUNG: 06.02.2025; Ogledov: 255; Prenosov: 7
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2. Multiwavelength observations of the extraordinary accretion event AT2021lwxP. Wiseman, Y. Wang, S. Hönig, N. Castro-Segura, P. Clark, C. Frohmaier, M. D. Fulton, Giorgos Leloudas, M. D. Fulton, Tanja Petrushevska, 2023, izvirni znanstveni članek Ključne besede: accretion, accretion discs, tidal disruption events, transients, galaxies, supermassive black holesc Objavljeno v RUNG: 15.05.2023; Ogledov: 2295; Prenosov: 5
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3. Carniolan savings bank and economic development of Carniola : dissertationNataša Hönig, 2021, doktorska disertacija Opis: The Carniolan Savings Bank was the first financial institution in the Slovenian territory. It was founded in 1820 in Ljubljana, the capital city of Carniola, a province in the Austrian part of the Habsburg Monarchy. This institution collected deposits and managed the credit operations in the country. Even after the basic idea changed due to business development, it continued to play a significant role as a microfinance provider.
The thesis covers the period from the establishment of the institution in 1820 to the disintegration of the Austro-Hungarian Monarchy in 1918. Therefore, the study also deals with the main features of the interwar period. It draws attention to some issues faced by the Savings Bank between 1918 and 1945. The dissertation defines the importance and dimensions of innovation in the institutional sense that the Savings Bank acquired. It defines the role that the institution had in an economic, social, political and national context. This has been achieved through in-depth analysis and a classic historical approach. The dissertation provides an original study of the extensive and unexplored historical material.
The Carniolan Savings Bank provides an excellent example of the intertwining of politics and nationalism with economic development. It had a significant impact on the changes that were a prerequisite for mobilising the financial resources of social classes that previously had no access to banking services. Therefore, the Savings Bank collected dispersed financial resources on the financial market by allocating capital to various investment opportunities. The most prominent were mortgage loans and the purchase of government securities. However, the rules in place at the state level limited the importance of the Savings Bank to the regional and especially the local level, reflecting its impact on the country’s economic development. Accordingly, it sought ways to get involved, as evidenced by Credit Association that was used by small merchants and craftsmen. Ključne besede: Carniolan Savings Bank, deposits, credit activity, microfinance, investments, economic nationalism, Habsburg Monarchy, the Province of Carniola Objavljeno v RUNG: 06.01.2022; Ogledov: 3470; Prenosov: 197
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