Supernova discovery statistics for 1998 . ... Sorted by Name For the year 1998 , 165 supernovae and 0 extragalactic novae were reported. 159 of these supernovae were named by CBAT, 0 were given possible supernova designations, and 6 were not reported to CBAT. 42 supernovae were found in NGC/IC galaxies, 68 were found in named galaxies 24 objects were discovered by amateurs 3 were brighter than 13th Magnitude 21 were brighter than 16th Magnitude 59 were brighter than 18th Magnitude 77 ...

... Up: Algorithms . ... Non-linear and non-parametric algorithms for data averaging, smoothing and clipping in the RATAN-600 flexible astronomical data processing system are proposed. Algorithms are based on robust methods and non-linear filters using an iterative approach to smoothing and clipping. ... The history of algorithms, based on the robust methods and non-linear filters using an iterative approach to smoothing and clipping, began twelve years ago in the data reduction at the RATAN-600. ...

... The Andromeda Galaxy (otherwise known as M31): our nearest spiral galaxy neighbor. ... If you could see M31's stellar halo with your naked eyes, Andromeda would be at least as big as 50 full moons across! ... Metallicity Profile'' Gilbert, Karoline M. , Kalirai, Jason S., Guhathakurta, Puragra, Beaton, Rachael L., Geha, Marla C., Kirby, Evan N., Majewski, Steven R., Patterson, Richard J., Tollerud, Erik J., Bullock, James S., Tanaka, Mikito, and Chiba, Masashi, 2014, arXiv, arXiv:1409.3843. ...

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