Rotational Variables: Kepler Versus ASAS-SN. arxiv.org/abs/2506.13919

New ASAS-SN paper, led by Evan Jennerjahn (Evan Jennerjahn) and Michael Tucker: "The ASAS-SN Low Surface Brightness Survey I: Proof-of-Concept and Potential Applications" arxiv.org/abs/2506.14873

A reminder that we observe the whole sky, often, and we have collected about 14 million science images so far:

Managed to find the new Nova last night (WIKI: "V462 Lupi, also known as Nova Lupi 2025, is a bright nova in the constellation Lupus discovered by All Sky Automated Survey for SuperNovae (ASAS-SN) on 12 June 2025").

Una nova recientemente descubierta, de nombre V462 Lupi, acaba de hacerse visible a simple vista en el firmamento. Hoy toca hablar de novas y de cómo y dónde observarla en el cielo. ¡Dentro hilo! 🧵👇

Nel breve video potete ammirare la "comparsa" in cielo della nova V462 Lupi. Un evento inaspettato, scoperto il 12 giugno 2025 grazie al progetto ASAS‑SN dell'Ohio State University. Inizialmente aveva una magnitudine di +8,7 e, in pochi giorni, la sua luce è cresciuta... 1/4

ASASSN-25bv is trying to tell us something:

Fresh discovery: a bright, nearby SN! ASASSN-25cw in NGC 1637, only ~10 Mpc away, g~13.7 mag: wis-tns.org/object/2025pht #VariableUniverse

In other news, funding to feed the accretion disk of 3C 273 has been now reduced by 52%, and by 2031 it will stop being a quasar:

Our paper on ASASSN-24fw, led by R. Fores-Toribio (OSU), is now on astro-ph: arxiv.org/abs/2507.03080 It is a truly unusual source, and it should do it again in ~44 years!

But wait, there is more! Another paper about ASASSN-24fw just dropped on astro-ph: "ASASSN-24fw: Candidate circumplanetary disk occultation of a main-sequence star" arxiv.org/abs/2507.05367

Nova V462 Lup is still dark in X-rays according to the 45ks NuSTAR observation on 2025-06-30. The Fermi-LAT GeV detection implies that the shock must be there, probably hidden by extreme absorption within the ejecta. astronomerstelegram.org/?read=17281

With more than 10 years of all-sky coverage, we can now look for slowly-variable sources: "The Unhurried Universe: A Continued Search for Long Term Variability in ASAS-SN" arxiv.org/abs/2507.07174

Another "weird" ASAS-SN discovery, named ASASSN-25db and just released via astronomy.ohio-state.edu/asassn/transie…

Deep dimming event ASASSN-25db from Citizen ASAS-SN -survey. This one has high MIR variability and RUWE > 5.

There is weird, and then there is ASASSN-25bv:

Just found a promising nova candidate (12.0mag) in NMW survey images. Posted to TOCP as TCP J18385851-0351482. There are pre-discovery detections on the rise by Citizen ASAS-SN and ZTF Survey Spectroscopy needed!

A new paper by our team! "A Systematic Search for Big Dippers in ASAS-SN" arxiv.org/abs/2507.19594

Galactic Nova ASASSN-25cm gradually getting fainter (g-band), but still very bright! (triangles are upper limits)