From jop at astro.columbia.edu Wed Oct 8 08:30:14 2014 From: jop at astro.columbia.edu (Joe Patterson) Date: Wed, 08 Oct 2014 08:30:14 -0400 Subject: (cba:news) V1101 Aql and others Message-ID: <54352E56.9040209@astro.columbia.edu> Hi CBAers, We have decided to suspend our V1101 Aql for the season... BUT a few time-series near minimum light (around 15.5) will still be very helpful - in specifying the *phase* of the negative superhump. We know it keeps pretty good time (and that in itself is pretty amazing). But HOW good, exactly? To answer that, we need to extend the coverage through quiescence - which will only last a few days. The amplitude of the signal is very high - simple for everyone to detect. We should keep after it each quiescence until evening twilight snatches Aquila away form us. Look at the AAVSO light curve on V1101 Aquila. It's a treat. Everything about this wonderful star is a treat. And I gotta say, Mister ASASSN-14ei is a helluva treat too! joe p.s. we'd love to start up our campaign on HV Ceti. A possible relative of T Pyx (which desperately needs relatives, if we are ever to understand it). At 18th mag it's a challenge; but at least it's hemispherically friendly to all (with a declination of +5 deg). ____________________________________________________________ Center for Backyard Astrophysics (CBA) mailing lists https://cbastro.org/communications/mailing-lists/ From jop at astro.columbia.edu Thu Oct 9 07:12:11 2014 From: jop at astro.columbia.edu (Joe Patterson) Date: Thu, 09 Oct 2014 07:12:11 -0400 Subject: (cba:news) FO Aqr, back in the saddle again... Message-ID: <54366D8B.7020608@astro.columbia.edu> Dear CBAers, FO Aquarii, one of our oldest friends, is misbehaving. The 21 minute period is shortening over the years, as are nearly all DQ Her stars (aka intermediate polars). But the 2013/4 period change is much too fast - way out of bounds. The star did something like this before (period increasing), and I suspect now that I was too hasty in regarding such misadventures as the result of some inscrutable noise process. It might be, of course... but now I realize I have to go through the 33 years of timings and study the residuals after the long-term period decrease is removed. Or better yet, if someone else did. Anyway, regardless of whether anyone is willing to put me out of my misery, it's important to put the star back on the menu. Still pretty well placed in the night sky... available to all hemispheres... and plenty bright (about 14.0), with a very large pulse amplitude. Actually, for any of you unacquainted with this star, it has one of the most beautiful light curves in our collection. I attach a splice of 2013 data from Berto and Greg Bolt. You can see that it deserves its title: King of the DQ Herculis stars! A good comparison is the AAVSO 122 star (V=12.213). Although short runs are definitely useful, longish (3-4 hrs) runs are preferred, because there are signals closely spaced in frequency (the spin frequency, plus an orbital sideband)... and technically it takes a full 4.8 hr orbit to *fully* resolve them. It's not a hugely significant point, because with abundant data the signals are very well distinguished. But longer is better. Enrique actually started the season back in July, so we have a decent baseline already. But let's get some good round-the-world coverage now, so we can explore these odd period changes in a supposedly well-understood star (not!). joe p.s. Josch, with the pulse period being relatively long and the amplitude high, it might be a good target for your mode of observing. Nightly observing with a single telescope would also allow us to check on whether the night-to-night phase changes (which also occur) are related to changes in brightness (accretion rate??). That's always been an unknown, and I've never had the data to evaluate it. -------------- next part -------------- 80.34626 1.418 80.34647 1.429 80.34670 1.407 80.34693 1.391 80.34715 1.358 80.34737 1.326 80.34761 1.347 80.34783 1.332 80.34806 1.327 80.34829 1.310 80.34850 1.275 80.34873 1.255 80.34896 1.258 80.34919 1.226 80.34941 1.225 80.34964 1.251 80.34986 1.263 80.35009 1.266 80.35032 1.233 80.35054 1.196 80.35077 1.253 80.35100 1.254 80.35122 1.301 80.35145 1.276 80.35168 1.257 80.35190 1.195 80.35213 1.209 80.35236 1.171 80.35258 1.305 80.35281 1.374 80.35303 1.354 80.35326 1.334 80.35349 1.306 80.35371 1.320 80.35394 1.347 80.35417 1.351 80.35439 1.394 80.35462 1.435 80.35484 1.425 80.35507 1.432 80.35530 1.463 80.35552 1.425 80.35575 1.405 80.35598 1.401 80.35620 1.453 80.35643 1.461 80.35666 1.451 80.35688 1.454 80.35711 1.495 80.35734 1.517 80.35756 1.568 80.35779 1.531 80.35802 1.507 80.35824 1.529 80.35847 1.514 80.35869 1.522 80.35893 1.497 80.35916 1.477 80.35938 1.485 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1.295 80.40405 1.304 80.40427 1.285 80.40449 1.242 80.40471 1.254 80.40493 1.270 80.40514 1.278 80.40536 1.238 80.40558 1.167 80.40580 1.171 80.40602 1.219 80.40624 1.262 80.40646 1.286 80.40668 1.314 80.40689 1.285 80.40711 1.312 80.40733 1.333 80.40755 1.290 80.40777 1.270 80.40799 1.258 80.40820 1.279 80.40842 1.284 80.40864 1.258 80.40886 1.225 80.40908 1.254 80.40930 1.201 80.40952 1.162 80.40974 1.206 80.40995 1.204 80.41017 1.139 80.41039 1.130 80.41061 1.171 80.41083 1.189 80.41105 1.220 80.41127 1.261 80.41148 1.237 80.41170 1.257 80.41192 1.253 80.41214 1.282 80.41236 1.304 80.41258 1.347 80.41280 1.291 80.41301 1.229 80.41323 1.284 80.41345 1.265 80.41367 1.288 80.41389 1.253 80.41411 1.244 80.41433 1.273 80.41455 1.259 80.41476 1.219 80.41498 1.217 80.41520 1.213 80.41542 1.154 80.41564 1.132 80.41586 1.134 80.41607 1.120 80.41629 1.102 80.41651 1.121 80.41673 1.085 80.41695 1.098 80.41717 1.132 80.41739 1.085 80.41761 1.106 80.41782 1.069 80.41804 1.063 80.41826 1.115 80.41848 1.054 80.41870 1.078 80.41892 1.129 80.41914 1.073 80.41935 1.062 80.41957 1.064 80.41979 1.101 80.42001 1.104 80.42023 1.171 80.42045 1.179 80.42067 1.188 80.42088 1.136 80.42110 1.117 80.42132 1.175 80.42154 1.228 80.42176 1.183 80.42198 1.215 80.42220 1.240 80.42241 1.279 80.42263 1.292 80.42285 1.296 80.42307 1.324 80.42329 1.353 80.42351 1.316 80.42373 1.334 80.42395 1.335 80.42416 1.358 80.42438 1.349 80.42460 1.376 80.42482 1.346 80.42504 1.406 80.42526 1.446 80.42548 1.423 80.42569 1.441 80.42591 1.484 80.42613 1.471 80.42635 1.487 80.42657 1.488 80.42679 1.544 80.42701 1.542 80.42722 1.520 80.42744 1.448 80.42766 1.441 80.42788 1.535 80.42810 1.531 80.42832 1.561 80.42854 1.594 80.42875 1.582 80.42897 1.498 80.42919 1.494 80.42941 1.450 80.42963 1.486 80.42985 1.431 80.43007 1.409 80.43028 1.395 80.43050 1.358 80.43072 1.313 80.43094 1.302 80.43116 1.214 80.43138 1.226 80.43159 1.227 80.43181 1.157 80.43203 1.170 80.43225 1.155 80.43247 1.112 80.43269 1.164 80.43290 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80.45487 1.525 80.45521 1.577 80.45556 1.636 80.45591 1.591 80.45626 1.529 80.45660 1.528 80.45695 1.582 80.45730 1.603 80.45764 1.581 80.45800 1.569 80.45835 1.578 80.45870 1.569 80.45905 1.547 80.45939 1.502 80.45974 1.425 80.46043 1.391 80.46078 1.330 80.46113 1.299 80.46148 1.270 80.46182 1.242 80.46217 1.225 80.46253 1.189 80.46288 1.099 80.46322 1.041 80.46357 1.108 80.46392 1.115 80.46427 1.173 80.46461 1.131 80.46496 1.081 80.46531 1.135 80.46565 1.166 80.46600 1.214 80.46635 1.286 80.46671 1.294 80.46705 1.368 80.46740 1.335 80.46775 1.251 80.46810 1.295 80.46844 1.307 80.46879 1.274 80.46914 1.324 80.46948 1.317 80.46983 1.342 80.47018 1.363 80.47053 1.339 80.47087 1.368 80.47123 1.432 80.47158 1.468 80.47193 1.418 80.47227 1.499 80.47262 1.552 80.47297 1.559 80.47332 1.587 80.47366 1.549 80.47401 1.498 80.47436 1.526 80.47470 1.526 80.47505 1.495 80.47540 1.475 80.47575 1.468 80.47611 1.484 80.47645 1.453 80.47680 1.415 80.47715 1.349 80.47749 1.323 80.47784 1.316 80.47819 1.320 80.47854 1.287 80.47888 1.289 80.47923 1.264 80.47958 1.255 80.47994 1.258 80.48028 1.252 80.48063 1.267 80.48098 1.247 80.48133 1.254 80.48167 1.283 80.48202 1.349 80.48237 1.383 80.48271 1.395 80.48306 1.433 80.48341 1.439 80.48376 1.512 80.48410 1.542 80.48445 1.509 80.48480 1.471 80.48514 1.446 80.48549 1.482 80.48584 1.480 80.48619 1.535 80.48653 1.512 80.48688 1.489 80.48723 1.503 80.48758 1.546 80.48792 1.568 80.48827 1.524 80.48862 1.557 80.48896 1.545 80.48932 1.511 80.48967 1.482 80.49002 1.466 80.49036 1.376 80.49071 1.318 80.49106 1.229 80.49141 1.269 80.49175 1.218 80.49210 1.193 80.49245 1.198 80.49280 1.173 80.49314 1.149 80.49349 1.101 80.49384 1.097 80.49418 1.037 80.49453 1.098 80.49488 1.079 80.49523 1.045 80.49557 1.097 80.49592 1.198 80.49627 1.175 80.49661 1.219 80.49696 1.203 80.49731 1.283 80.49766 1.371 80.49800 1.448 80.49835 1.554 80.49870 1.518 80.49906 1.596 80.49940 1.631 80.49975 1.642 80.50010 1.656 80.50045 1.735 80.50079 1.707 80.50114 1.707 80.50149 1.706 80.50183 1.726 80.50218 1.704 80.50253 1.597 80.50288 1.619 80.50322 1.564 80.50357 1.533 80.50392 1.573 80.50427 1.584 80.50461 1.553 80.50496 1.489 80.50531 1.470 80.50565 1.476 80.50600 1.509 80.50635 1.380 80.50670 1.404 80.50704 1.453 80.50739 1.445 80.50774 1.401 80.50808 1.413 80.50843 1.340 80.50878 1.395 80.50913 1.414 80.50947 1.389 80.50982 1.341 80.51017 1.428 80.51052 1.479 80.51086 1.528 80.51122 1.514 80.51157 1.559 80.51192 1.610 80.51226 1.624 80.51261 1.661 80.51296 1.614 80.51330 1.651 80.51365 1.723 80.51400 1.705 80.51435 1.764 80.51469 1.702 80.51504 1.775 80.51539 1.812 80.51573 1.722 80.51608 1.747 80.51643 1.775 80.51678 1.701 80.51712 1.698 80.51747 1.755 80.51782 1.794 80.51817 1.704 80.51851 1.644 80.51886 1.591 80.51921 1.591 80.51955 1.531 80.51990 1.439 80.52025 1.394 80.52060 1.507 80.52094 1.469 80.52129 1.479 80.52164 1.464 80.52198 1.458 80.52233 1.482 80.52269 1.504 80.52304 1.459 80.52339 1.432 80.52373 1.420 80.52408 1.422 80.52443 1.395 80.52477 1.367 80.52512 1.396 80.52547 1.494 80.52582 1.508 80.52616 1.540 80.52651 1.585 80.52686 1.627 80.52720 1.685 80.52755 1.657 80.52790 1.692 80.52825 1.706 80.52859 1.811 80.52894 1.863 80.52929 1.897 80.52964 1.892 80.52998 1.866 80.53033 1.842 80.53068 1.796 80.53102 1.819 80.53137 1.818 80.53172 1.770 80.53207 1.771 80.53241 1.746 80.53276 1.703 80.53311 1.680 80.53345 1.603 80.53381 1.550 80.53416 1.483 80.53451 1.414 80.53486 1.394 80.53520 1.347 80.53555 1.359 80.53590 1.318 80.53624 1.295 80.53659 1.272 80.53694 1.274 80.53729 1.293 80.53763 1.237 80.53798 1.229 80.53833 1.241 80.53867 1.321 80.53902 1.332 80.53937 1.295 80.53972 1.298 80.54006 1.347 80.54041 1.332 80.54076 1.354 80.54111 1.389 80.54145 1.468 80.54180 1.420 80.54215 1.358 80.54249 1.453 80.54284 1.483 80.54319 1.528 80.54354 1.551 80.54388 1.646 80.54423 1.742 80.54458 1.748 80.54492 1.782 80.54527 1.753 80.54562 1.737 80.54597 1.750 80.54631 1.767 80.54666 1.758 80.54701 1.712 80.54737 1.651 80.54771 1.625 80.54806 1.573 80.54841 1.568 80.54876 1.499 80.54910 1.409 80.54945 1.307 80.54980 1.280 80.55014 1.253 80.55049 1.248 80.55084 1.254 80.55119 1.253 80.55153 1.238 80.55188 1.159 80.55223 1.121 80.55258 1.109 80.55292 1.111 80.55327 1.177 80.55362 1.248 80.55396 1.278 80.55431 1.315 80.55466 1.362 80.55501 1.369 80.55535 1.426 80.55570 1.441 80.55605 1.401 80.55639 1.461 80.55675 1.499 80.55710 1.485 80.55745 1.425 80.55780 1.410 80.55814 1.464 80.55849 1.499 80.55884 1.414 80.55918 1.452 80.55953 1.504 80.55988 1.529 80.56023 1.540 80.56057 1.441 80.56092 1.499 80.56127 1.503 80.56161 1.546 80.56196 1.498 80.56231 1.432 80.56266 1.404 80.56300 1.337 80.56335 1.310 80.56370 1.279 80.56405 1.233 80.56440 1.146 80.56475 1.166 80.56510 1.195 80.56545 1.183 80.56579 1.200 80.56614 1.188 80.56649 1.163 80.56683 1.153 80.56718 1.132 80.56753 1.130 80.56788 1.124 80.56822 1.145 80.56857 1.136 80.56892 1.174 80.56927 1.195 80.56961 1.195 80.56996 1.192 80.57031 1.219 80.57065 1.300 80.57100 1.365 80.57135 1.433 80.57170 1.451 80.57204 1.493 80.57239 1.485 80.57274 1.512 80.57308 1.535 80.57343 1.536 80.57378 1.512 80.57413 1.524 80.57447 1.487 80.57483 1.446 80.57518 1.470 80.57553 1.490 80.57587 1.507 80.57622 1.509 80.57657 1.477 80.57692 1.342 80.57726 1.254 80.57761 1.278 80.57796 1.282 80.57830 1.234 80.57865 1.147 80.57900 1.158 80.57935 1.114 80.57969 1.051 80.58004 1.051 80.58039 1.038 80.58073 1.075 80.58108 1.129 80.58143 1.146 80.58178 1.140 80.58212 1.135 80.58247 1.164 80.58282 1.155 80.58317 1.164 80.58351 1.194 80.58386 1.227 80.58421 1.256 80.58455 1.300 80.58490 1.280 80.58525 1.302 80.58560 1.400 80.58594 1.352 80.58629 1.296 80.58664 1.350 80.58698 1.442 80.58734 1.479 80.58769 1.436 80.58804 1.428 80.58839 1.467 80.58873 1.445 80.58908 1.387 80.58943 1.450 80.58977 1.445 80.59012 1.444 80.59047 1.383 80.59082 1.355 80.59116 1.319 80.59151 1.300 80.59186 1.288 80.59220 1.305 80.59255 1.257 80.59290 1.225 80.59325 1.163 80.59359 1.072 80.59394 1.047 80.59429 1.042 80.59464 1.096 80.59498 1.137 80.59533 1.141 80.59568 1.094 80.59602 1.105 80.59637 1.131 80.59672 1.112 80.59707 1.164 80.59741 1.189 80.59776 1.214 80.59811 1.251 80.59845 1.255 80.59880 1.278 80.59915 1.295 80.59951 1.336 80.59986 1.318 80.60020 1.342 80.60055 1.370 80.60090 1.401 80.60124 1.420 80.60159 1.425 80.60194 1.431 80.60229 1.464 80.60263 1.483 80.60298 1.479 80.60333 1.462 80.60367 1.494 80.60402 1.492 80.60437 1.451 80.60472 1.426 80.60506 1.384 80.60541 1.356 80.60576 1.297 80.60611 1.337 80.60645 1.310 80.60680 1.293 80.60715 1.237 80.60749 1.255 80.60784 1.270 80.60819 1.204 80.60854 1.169 80.60888 1.223 80.60923 1.218 80.60958 1.243 80.60992 1.248 80.61027 1.232 80.61063 1.179 80.61098 1.251 80.61133 1.218 80.61167 1.251 80.61202 1.286 80.61237 1.299 80.61271 1.293 80.61306 1.270 80.61341 1.263 80.61376 1.301 80.61410 1.374 80.61445 1.361 80.61480 1.340 80.61514 1.420 80.61549 1.486 80.61584 1.529 80.61619 1.489 80.61653 1.460 80.61688 1.468 80.61723 1.411 80.61758 1.380 80.61792 1.371 80.61827 1.359 80.61862 1.375 80.61896 1.346 80.61932 1.275 80.61967 1.258 80.62002 1.229 -------------- next part -------------- ____________________________________________________________ Center for Backyard Astrophysics (CBA) mailing lists https://cbastro.org/communications/mailing-lists/ From jop at astro.columbia.edu Thu Oct 16 20:11:48 2014 From: jop at astro.columbia.edu (Joe Patterson) Date: Thu, 16 Oct 2014 20:11:48 -0400 Subject: (cba:news) Fwd: [vsnet-alert 17851] WX Ari very deep fading In-Reply-To: References: Message-ID: <54405EC4.9050907@astro.columbia.edu> A very low state of another VY Scl star - and one we've observed pretty extensively in the hign state. This is a great target, if you can handle the magnitude (18th). And if you think you can't, then... well, think again, at least briefly. One theory of these stars predicts large-amplitude phoptmetric signals at the 3.5 hour orbital period. I'm not *expecting* that, but it's possible. Let's look. At this brightness, unfiltered is the only reasonable choice. You can use longish integrations times, since we won't be detecting short periods in so faint a star. joe -------- Original Message -------- Return-Path: This cataclysmic variable of VY Scl type ("anti-nova") is in the very low state on the recent survey images from MASTER-Kislovodsk robotic telescope. WX Ari 20140103.649 160C MASTER-Kislovodsk 20140103.680 159C MASTER-Kislovodsk 20141012.971 184C MASTER-Kislovodsk 20141013.017 182C MASTER-Kislovodsk The recent fading episode was observed 2 years ago (September-December 2012). Eddy Muyllaert has reported unfiltered magnitudes from 16.4: to 16.8: on 2012 Sep. 21 - Oct. 15 [vsnet-alert 15008]. AAVSO data show the further dimming to as low as 17.4 on 2012 Dec. 20 (with the large-amplitude orbital variations from about 16.8 to 17.4). Catalina Sky Survey light curve indicates that after recovering from the low state the star has reached higher-than-normal level peaking at 14.4 on 2013-09-16, then started fading again: http://nesssi.cacr.caltech.edu/catalina/20010316/103161090154100096p.html The current fading episode appears to be the deepest recorded. Magnitude range in AAVSO VSX is 14.5 - <16.7 CV, orbital period is 3.344 hr. Denis Denisenko Member of MASTER team at SAI MSU ____________________________________________________________ Center for Backyard Astrophysics (CBA) mailing lists https://cbastro.org/communications/mailing-lists/ From jop at astro.columbia.edu Mon Oct 20 07:22:52 2014 From: jop at astro.columbia.edu (Joe Patterson) Date: Mon, 20 Oct 2014 07:22:52 -0400 Subject: (cba:news) WX Ari, V1101 Aql, FO Aqr, and the two assassins Message-ID: <5444F08C.8000909@astro.columbia.edu> Hi CBAers, Great, great coverage on ASASSN-14ei (see Enrique's note in cba-chat). 7 echo outbursts and counting... and some other 15-hour wiggles that resist understanding (no real precedent for such things). The usual southern stalwarts: Gordon, Berto, Josch, Bob Rea... and now I see some Peter Nelson data coming in. Follow this helium CV to the last photon. And now GAIA, a new arrival to our Solar System, has found another helium CV: http://www.astronomerstelegram.org/?read=6593 Actually this is a re-discovery of ASASSN-14cn, announced back in June 2014. But the ATel announcement of the doubled helium lines ratchets this guy up in importance. Very poorly placed in the evening sky. But on the other hand, the period is likely to be very short (<1 hour), so there's "bang for your buck". Let's get acquainted with this guy in this last month of its season! Enrique and Richard Sabo have jumped on WX Ari, a VY Scl star ("anti-dwarfnova") now in a low state. As hoped, it has a smooth orbital modulation now, possibly due to the heated secondary. My further hope is that we can use this to deduce the temperature of the WD (and it wouldn't hurt to have a direct measure of that temperature from HST, by the way). Let's work hard to assemble that orbital light curve. The period is ~3.5 hours, but it's quite faint, so for high precision we need to collect many dozens of orbits. FO Aqr. Wow, CBAers really jumped on this one! The light curves are beyond beautiful, and demonstrate that the very rapid shortening of the period really did happen. But the point is proven, and we can now continue to follow it without intensive coverage. Keep going, but mark it for occasional (weekly?) observations. At a dec of -8, available to everyone. Then we'll pick it back up in June 2015. Finally there's V1101 Aql, the star of 2014 - and no slouch in 2013 either. We suspended our campaign a month ago, and Aquila is slumping over to the west - BUT it's important that we train our scopes back on it now. Why? Because, V1101 Aql has the best negative superhumps in the sky (among CVs; Hercules X-1 and SS 433 are competitors from other realms). We want to study it from the longest possible yearly baseline, to assess how good or how bad the superhump clock is in keeping time. Let's observe it over the next month, then pick it up again in May 2015 - that'll keep the observation gap short. Other campaigns: status quo ante. I'll write again in a coupla days. Joe P ____________________________________________________________ Center for Backyard Astrophysics (CBA) mailing lists https://cbastro.org/communications/mailing-lists/ From jop at astro.columbia.edu Tue Oct 28 08:12:59 2014 From: jop at astro.columbia.edu (Joe Patterson) Date: Tue, 28 Oct 2014 08:12:59 -0400 Subject: (cba:news) RX And, done for the year; V592 Cas, FY Per, FS Aur, ES Cet Message-ID: <544F884B.3080407@astro.columbia.edu> Dear CBAers, The response for the RX And campaign has been wonderful; I can hardly imagine getting any better coverage from the Earth's surface. The star's low states (where the periodicity lurks) are of short duration, so we have to analyze each one separately. We'll never do better than we just did - so I recommend that we END the campaign now. It certainly looks like we got what we wanted and more. Another bright target perfectly placed in the sky is V592 Cas, and that's a good candidate to RX And for you bright-star-loving northern CBAers. Or FY Per; the latter is a true mystery - we're practically clueless re this star - but it presents a big observational problem: the variation is quite weak, and you must use a filter (V) to subdue differential extinction. It seems to have a 1.6 hour spectroscopic period, and a 6.2 hour photometric period. The latter is weak and not necessarily permanent - so really needs to be firmed up, or rejected. Tough observational problem, though. FY Per is FS Aur's only hope to have a cousin in the CV zoo. And for that matter, there's FS Aur itself, presenting a similar but somewhat better documented mystery [P_phot = 3.1 hr, P_spec = 1.4 hr]. Good year and month to revisit this guy! Not as formidable a challenge, but also very low in entertainment value - at first sight the light curve seems erratic and not interesting. We definitely want a few exploratory runs on these two stars - then we'll see where to go. Whereas V592 Cas is a sure winner no matter what shows up. Of course, ASASSN-14ei continues to produce pure gold - gold at 47 degrees south. No CBA action yet on ES Cet yet - but that would be mighty nice to start! joe p ____________________________________________________________ Center for Backyard Astrophysics (CBA) mailing lists https://cbastro.org/communications/mailing-lists/ From jop at astro.columbia.edu Fri Oct 31 02:21:21 2014 From: jop at astro.columbia.edu (Joe Patterson) Date: Fri, 31 Oct 2014 02:21:21 -0400 Subject: (cba:news) Fwd: [baavss-alert] PNV J03093063+2638031: possible "nova" (11.0 mag) in Aries In-Reply-To: <1414656739.71621.YahooMailBasic@web171206.mail.ir2.yahoo.com> References: <1414656739.71621.YahooMailBasic@web171206.mail.ir2.yahoo.com> Message-ID: <54532A61.206@astro.columbia.edu> A really tempting target for lengthy coverage in the northern fall sky! joe p -------- Original Message -------- PNV J03093063+2638031 R.A. 03h09m29.86s Decl. +26?38'04.49" (J2000.0) 2014 Oct. 29.630 UT, 11.2; 29.815, 11.0 (CCD, unfiltered). Probably a CV with large outburst amplitude (blue 18-19 magnitude star at quiescence) There is a GALEX source 1.3" from the position that was reported by Seiichiro Kiyota: GALEX J030929.7+263804 R.A. 03h09m29.767s Decl. +26?38'04.82" (J2000.0) FUV= 19.83, NUV= 19.68 mag Further possible identifications: USNO-B1.0 1166-0037733: B1=19.18, R1=18.66, B2=19.22, R2=18.14, I=18.70 mag GSC 2.3.2 NCGZ009444: F=18.22, V= 18.25, N= 18.35 mag WISE J030929.78+263804.2: W1=16.610, W2=16.397 mag SDSS J030929.77+263804.2: u=19.137, g=18.882, r=18.907, i=19.011 mag "2014 10 29.630 Discovered by Seiji Ueda, Hokkaido, Japan, on three 30-s frames (limiting magnitude = 12.9) using 0.25-m f/3.4 reflector + Nikon digital camera, who confirmed the star has no motion on three frames taken on 2014 Oct. 29.815 and then star was mag.= 11.0. Nothing is visible at this location on his recent frames (limiting mag.= 13) taken on 2014 Oct. 22 and 27 UT using same telescope." "2014 10 30.2816 I took confirmation image of this PNV with 0.25m (f/3.4) Reflector + SBIG ST-10XME CCD at Mayhill, NM, USA of iTelescope.NET, remotely. Photometric results were B=10.83, V=11.02 and Ic=10.92. Position end figures were 29.86 and 04.49 in R.A. and Dec. My image is available at http://meineko.sakura.ne.jp/ccd/PNV_J03093063+2638031.jpg Seiichiro Kiyota (Kamagaya, Japan)" http://www.cbat.eps.harvard.edu/unconf/followups/J03093063+2638031.html Clear skies, Patrick ____________________________________________________________ Center for Backyard Astrophysics (CBA) mailing lists https://cbastro.org/communications/mailing-lists/