From jop at astro.columbia.edu Wed Aug 7 18:57:24 2019 From: jop at astro.columbia.edu (Joe Patterson) Date: Wed, 7 Aug 2019 18:57:24 -0400 Subject: (cba:news) AM CVn and MAXI J1820+070: The 2 Big Campaigns of 2018-9 Message-ID: Hi CBAers, More on 2019 targets in a few hours. Attached are our papers on the major targets of the past year, These, or something close to these, have perhaps been published by SAS now... but, anyway, the regular-journal submissions (slightly different from these) will come out by summer's end. joe p -------------- next part -------------- A non-text attachment was scrubbed... Name: amcvn-sas2019.pdf Type: application/pdf Size: 572645 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: maxi-sas.pdf Type: application/pdf Size: 128618 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: maxisas2a.pdf Type: application/pdf Size: 97495 bytes Desc: not available URL: -------------- next part -------------- ____________________________________________________________ Center for Backyard Astrophysics (CBA) mailing lists https://cbastro.org/communications/mailing-lists/ From jop at astro.columbia.edu Wed Aug 7 21:32:27 2019 From: jop at astro.columbia.edu (Joe Patterson) Date: Wed, 7 Aug 2019 21:32:27 -0400 Subject: (cba:news) CBA Aug-Sep targets Message-ID: <034bb520-228f-2083-eca9-67fcdc91bdad@astro.columbia.edu> Hi CBAers, The HP Lib campaign is over. Very nice coverage, sufficient to establish the orbital period to high precision. Not quite enough to establish the cycle count over decades (as with AM CVn)... but it should be after next year. The last menu (July 5) is still current... but with some important additions: QR And, V1500 Cyg, and BW Scl. And V630 Sgr, if it's not too faint. And definitely Maxie - keep an eye out for its possible adventures (no need for time series) Although I mentioned numerous DQ Her stars (intermediate polars) in the last message, Enrique's recent post also lists some important and recently discovered ones. And a reminder. In general, the IPs are adequately served by medium-length time series (2-3 hours), longer ones are more impactful. For the novae and novalikes, lengthy time series are greatly to be preferred. Also... some of the nova targets are pretty damn faint. If they're too faint, then skip the time series and simply report one magnitude or upper limit. That would be useful! joe ____________________________________________________________ Center for Backyard Astrophysics (CBA) mailing lists https://cbastro.org/communications/mailing-lists/ From jp42 at columbia.edu Sat Aug 10 16:14:11 2019 From: jp42 at columbia.edu (Joe Patterson) Date: Sat, 10 Aug 2019 16:14:11 -0400 Subject: (cba:news) Fwd: Re: (cba:chat) MAXIE J1820+070 paper In-Reply-To: References: Message-ID: <3fe54a33-83ab-64e9-3c07-21f9f437b33b@columbia.edu> Hi CBAers, Joe and Josch are at it again... and Maxie is at it again, at least to some degree.? That means it's back to the sky's highest priority.? Seasonally appropriate for long runs, and dec-appropriate for all observers (who can handle 16.6).? HIgh time resolution not needed; 60-90 s is just fine. See if you nail it tonight and report quickly; it would be good to get the X-ray telescopes going if this is sustained. (Though they may already be observing it, since they all fell in love with this star last year.) joe p -------- Forwarded Message -------- Subject: Re: (cba:chat) MAXIE J1820+070 paper Date: Sat, 10 Aug 2019 13:50:28 -0500 From: Joe Ulowetz Reply-To: cba-chat at cbastro.org To: cba-chat at cbastro.org I can confirm that I also measured Maxie at mag?16.658 (V band) last night, which is about 1.5 magnitudes brighter than normal lately. -Joe U. Virus-free. www.avg.com On Sat, Aug 10, 2019 at 7:55 AM Josch Hambsch > wrote: Joe, I may have access to a larger telescope, though I do not yet know for how long. Would it make sense to go for time series for MAXIE? I have observed it last night at mag 16.8 (V band) and based on the AAVSO data there seems to be a tendency of an increase from the dip around mag 18.5 a few nights ago (around begin of August). Josch -----Original Message----- From: cba-chat [mailto:cba-chat-bounces at cbastro.org ] On Behalf Of Joe Patterson Sent: Donnerstag, 8. August 2019 00:26 To: cba-chat at cbastro.org Subject: Re: (cba:chat) MAXIE J1820+070 paper Absolutely!? The one thing holding us up was the knowledge of Porb (which reveals q through the venerable epsilon (q) relation.? Time to finish it now .joe On 8/7/2019 3:32 PM, Josch Hambsch wrote: > > Maybe of interest: > > https://arxiv.org/pdf/1907.00938.pdf > > Will there be one from CBA in the near future? > > Regards, > > Gr??e, > > Groeten, > > Josch > > MPC code: G39 > > > >? ? ? ?Virenfrei. www.avast.com > campaign=sig-email&utm_content=emailclient> > > > <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> > > ____________________________________________________________ > 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/ --- Diese E-Mail wurde von Avast Antivirus-Software auf Viren gepr?ft. https://www.avast.com/antivirus ____________________________________________________________ Center for Backyard Astrophysics (CBA) mailing lists https://cbastro.org/communications/mailing-lists/ -------------- next part -------------- ____________________________________________________________ Center for Backyard Astrophysics (CBA) mailing lists https://cbastro.org/communications/mailing-lists/ -------------- next part -------------- ____________________________________________________________ Center for Backyard Astrophysics (CBA) mailing lists https://cbastro.org/communications/mailing-lists/ From jop at astro.columbia.edu Sat Aug 10 21:02:42 2019 From: jop at astro.columbia.edu (Joe Patterson) Date: Sat, 10 Aug 2019 21:02:42 -0400 Subject: (cba:news) ATel #13014 Message-ID: <41073f02-0451-52b3-48c1-6a8257d2f523@astro.columbia.edu> Our new report on Mister Maxie is now available as ATel 13014. We just barely avoided the dreaded number 13 thousand and 13. Nice work, guys. This one is Hambsch et al. (Ulowetz, Vanmunster, Cejudo). Those were the guys doing the occasional monitoring - which allowed us to deduce that this was beyond just another wiggle. At least, so it appears. Help us flesh this out by obtaining long time series on Mister Maxie as soon as possible! Since Joe U's discovery of the first re-brightening in February 2019, we don't really know anything about periodic variations. Aquila season hadn't remotely begun at that point. But having not done any time series analysis of our 2019 photometry, maybe some of you might want to take a crack at that. There's not much of it, but there is also non-CBA (as well as CBA) data deposited in the AAVSO archive. Most of you snapshotters have not actually sent your data in, but maybe you could send it in now in compact form? And Jonathan, maybe you could collect the CBA-submitted stuff? I don't expect anything like those giant superhumps of last year. But this has some promise of being the best-observed black-hole nova ever, so let's us try to nail the relentless time-series photometry angle as well as we can. joe p ____________________________________________________________ Center for Backyard Astrophysics (CBA) mailing lists https://cbastro.org/communications/mailing-lists/ From jop at astro.columbia.edu Sun Aug 25 18:36:12 2019 From: jop at astro.columbia.edu (Joe Patterson) Date: Sun, 25 Aug 2019 18:36:12 -0400 Subject: (cba:news) PX And Message-ID: Remember, the famous SW Sex star PX And is now in a deep low state now, at V~17.8 (diving lower during the sclipses). A GREAT target if you can handle the brightness. This is not a target where you have to be concerned about time resolution. We're mainly interested in the light curve (including eclipses), and any semi-reasonable time resolution is fine. joe First known low state in 35 years. ____________________________________________________________ Center for Backyard Astrophysics (CBA) mailing lists https://cbastro.org/communications/mailing-lists/