Tootfinder

Counterpart identification and classification for eRASS1 and characterisation of the AGN content
M. Salvato, J. Wolf, T. Dwelly, H. Starck, J. Buchner, R. Shirley, A. Merloni, A. Georgakakis, F. Balzer, M. Brusa, A. Rau, S. Freund, D. Lang, T. Liu, G. Lamer, A. Schwope, W. Roster, S. Waddell, M. Scialpi, Z. Igo, M. Kluge, F. Mannucci, S. Tiwari, D. Homan, M. Krumpe, A. Zenteno, D. Hernandez-Lang, J. Comparat, M. Fabricius, J. Snigula, D. Schlegel, B. A. Weaver, R. Zhou, A. Dey, F. Vald…

Counterpart identification and classification for eRASS1 and characterisation of the AGN content
[abridged] Accurately accounting for the AGN phase in galaxy evolution requires a large, clean AGN sample. This is now possible with SRG/eROSITA. The public Data Release 1 (DR1, Jan 31, 2024) includes 930,203 sources from the Western Galactic Hemisphere. The data enable the selection of a large AGN sample and the discovery of rare sources. However, scientific return depends on accurate characterisation of the X-ray emitters, requiring high-quality multiwavelength data. This paper presents the i…

Proximity effect and p-wave superconductivity in s-wave superconductor/helimagnet heterostructures
G. A. Bobkov, A. V. Kornev, A. M. Bobkov, I. V. Bobkova
https://arxiv.org/abs/2507.05479

Proximity effect and p-wave superconductivity in s-wave superconductor/helimagnet heterostructures
It is known that in contrast to homogeneous ferromagnetism helical magnetism is compatible with superconductivity and causes only weak suppressive effect on superconducting critical temperature. Despite this fact it induces p-wave triplet superconducting correlations in homogeneous superconducting systems with intrinsic helical magnetism. The combination of these two facts indicates a high potential for the application of such systems in disspationless spintronics. For this reason here we inves…

Heute vor 60 Jahren: Am 27. August 1965 zündeten die USA im Rahmen von Operation #Flintlock die 6. #Atombombe "Centaur". Flintlock war eine Serie von Tests zwischen 65/66 bei der insgesamt 47 #Kernwaffentests

Estimating the Local Hubble Parameter from the Thermal Evolution of Earth and Mars
Yurii V. Dumin, Elizaveta G. Khramova, Ludmila M. Svirskaya, Eugen S. Savinykh
https://arxiv.org/abs/2508.16694

Estimating the Local Hubble Parameter from the Thermal Evolution of Earth and Mars
The problem of local (e.g., interplanetary) Hubble expansion is studied for a long time but remains a controversial subject till now; and of particular interest is a plausible value of the local Hubble parameter at the scale of the Solar system. Here, we tried to estimate the corresponding quantity by the analysis of surface temperatures on the Earth and Mars, which are formed by a competition between a variable luminosity of the Sun and increasing radii of the planetary orbits. Our work employ…

GRB 250704B: An Off-axis Short GRB with a Long-Lived Afterglow Plateau
Vishwajeet Swain, Tom\'as Ahumada, Sameer K. Patil, Yogesh Wagh, Varun Bhalerao, Mansi Kasliwal, Ehud Nakar, Shreya Anand, Igor Andreoni, G. C. Anupama, Anuraag Arya, Arvind Balasubramanian, Sudhanshu Barway, Malte Busmann, Jonathan Carney, Michael Coughlin, Deepak Eappachen, Daniel Gruen, Xander J. Hall, Viraj Karambelkar, Tanishk Mohan, Brendan O'Connor, Antonella Palmese, Utkarsh Pathak, D. K. Sahu, Adity…

GRB 250704B: An Off-axis Short GRB with a Long-Lived Afterglow Plateau
We present a detailed multi-wavelength afterglow study of the short GRB 250704B, extensively monitored in optical and near-infrared bands. Its afterglow displays an unusually long-duration plateau followed by an achromatic break and a steep decline, deviating from canonical GRB afterglows. While long plateaus are often explained by central engine activity, we find that for GRB 250704B, an energy injection model requires unreasonable parameters. The afterglow is better explained by an off-axis p…

LIGO/Virgo/KAGRA neutron star merger candidate S250206dm: Zwicky Transient Facility observations
Tom\'as Ahumada, Shreya Anand, Mattia Bulla, Vaidehi Gupta, Mansi Kasliwal, Robert Stein, Viraj Karambelkar, Eric C. Bellm, Theophile Jegou du Laz, Michael W. Coughlin, Igor Andreoni, Smaranika Banerjee, Aleksandra Bochenek, K-Ryan Hinds, Lei Hu, Antonella Palmese, Daniel Perley, Natalya Pletskova, Anirudh Salgundi, Avinash Singh, Jesper Sollerman, Vishwajeet Swain, Avery Wold, Varun Bh…

LIGO/Virgo/KAGRA neutron star merger candidate S250206dm: Zwicky Transient Facility observations
We present the searches conducted with the Zwicky Transient Facility (ZTF) in response to S250206dm, a bona fide event with a false alarm rate of one in 25 years, detected by the International Gravitational Wave Network (IGWN). Although the event is significant, the nature of the compact objects involved remains unclear, with at least one likely neutron star. ZTF covered 68% of the localization region, though we did not identify any likely optical counterpart. We describe the ZTF strategy, pote…

Efficacy of Galaxy Catalogues for following up gravitational wave events
Tamojeet Roychowdhury, Harsh Choudhary, Varun Bhalerao, David O. Cook, Viraj Karambelkar, Mansi M. Kasliwal, Harsh Kumar, Surhud More, Gaurav Waratkar
https://arxiv.org/abs/2507.11635

Efficacy of Galaxy Catalogues for following up gravitational wave events
The detection of gravitational waves (GW) by the LIGO-Virgo-KAGRA (LVK) network has opened up a new era in astrophysics. The identification of the electromagnetic counterparts of GW sources is crucial for multi-messenger astronomy, one way of which is to use galaxy catalogues to guide optical follow-up observations. In this paper, we test the utility of galaxy-targeted approach with mass prioritised galaxy ranking for the ongoing LIGO O4 run. We have used the simulated results for the expected …