From jop at astro.columbia.edu Tue Feb 19 07:25:30 2019 From: jop at astro.columbia.edu (Joe Patterson) Date: Tue, 19 Feb 2019 07:25:30 -0500 Subject: (cba:news) stars for february-march 2019 Message-ID: <4fcf4c1e-2b96-9515-a85f-25cba1d64c0d@astro.columbia.edu> Hi CBAers, Attached. Pay special attention to #10 and 11. joe p -------------- next part -------------- A non-text attachment was scrubbed... Name: starsfeb_2019.pdf Type: application/pdf Size: 18940 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: starsfeb_2019.odt Type: application/vnd.oasis.opendocument.text Size: 26230 bytes Desc: not available URL: -------------- next part -------------- ____________________________________________________________ Center for Backyard Astrophysics (CBA) mailing lists https://cbastro.org/communications/mailing-lists/ From jp42 at columbia.edu Wed Feb 20 06:45:26 2019 From: jp42 at columbia.edu (Joe Patterson) Date: Wed, 20 Feb 2019 06:45:26 -0500 Subject: (cba:news) (cba:chat) IP Stars (many of which are novae) In-Reply-To: References: Message-ID: <6dd3a8ee-f32a-7ed5-ab75-7403cfcc7738@columbia.edu> Great list, Lew.? I can't praise Koji's list enough (although I'll try).? Despite my recent infatuation with novae, IPs are my first love... and this list manages to compact a huge range of useful information, really well suited for picking-and-choosing. Very few of these stars (maybe 10 in all) have known rates of period change, and this is a really desirable thing to know.? It takes faithful monitoring over an interval of at least a few years, and that's "a bridge too far" for most professional astronomers.? But not for us.? Lew's strategy of adopting a few well-placed stars (with a 3-star or above rating) and covering them throughout the season is a good one.? Shawn Dvorak has been doing something like that for years, though with a wider net (not just IPs). Some stars which caught my eye on scanning this list (for the umpteenth time; it's GOSPEL): WX Pyx, EI UMa, V1025 Cen, and IGR1509-66. If you want to construct your own sub-list, the one item missing from the list is magnitude.? You'll find many of them in Koji's detailed pages.? Others are just "?" - but you could measure it! joe p On 2/19/2019 9:24 PM, Lew Cook wrote: > I pick and choose from this list for my special interest objects. Many > of these are on Joe's target lists. I select only those which have 3 > stars or more in the last column. > > It is from Koji Mukai's IP Web pages at Goddard SFC. > > https://asd.gsfc.nasa.gov/Koji.Mukai/iphome/catalog/alpha.html > > Lewis M. Cook (Lew) > > ____________________________________________________________ > Center for Backyard Astrophysics (CBA) mailing lists > https://cbastro.org/communications/mailing-lists/ ____________________________________________________________ Center for Backyard Astrophysics (CBA) mailing lists https://cbastro.org/communications/mailing-lists/