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Recurrent Nova T CrB
Nightly V snapshots are requested from now through two weeks after the HST observations take place. Once the date and time are announced, V observations will be critical in the few days before the HST date; a positive V observation is required 24 hours before the date so the HST team can make a go/nogo decision.LL Lyr has a range of 12.9 - 18.5 V. The most recent observations of it in the AAVSO International Database show it at V magnitude 17.649 +/- 0.131 on 2023 Sep.18.83551 UT (A. Steenkamp, Horsham, W. Sussex, UK) and <14.9 visual on Sep. 20.12640 UT (T. Benner, Perkasie, PA).
возникают сомненья в возможности съёмки без засветки поля
TCP J17274332-1612188
Black Hole X-ray Binaries. Interacting binary systems where X-rays are produced by material accreting from a secondary companion star onto a black hole (BH) primary through an accretion disk. Most of them (the transient sources) are a subtype of the LMXB but there are also some HMXB that are BHXB (usually the persistent sources, which spend most of their time in an X-ray bright state). They show outbursts as a consequence of instabilities developing in the accretion disk that cause more rapid mass transfer onto the BH and lead to bright X-ray emission. They also get brighter in the optical bands by several magnitudes.
Близость блеска компонентов?
Вышла статья про блазар в Медведице, среди авторов - Филипп Романов!
Пусть не на 8m, и даже не на 6m, пусть всего на 2-3m и даже не за 15 сек, а хотя бы за минуты - есть ли такие красные карлики на небе, которые могут выдать нечто подобное не раз в сто лет, а скажем раз в год?
Да нет, вроде не мешает Вега...