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II INTERNATIONAL WORKSHOP

On Sunday, 19 participated in the II International Workshop on Double Stars . As in the previous edition , the event was organized and coordinated from Argentina by members of the RAA ( Roberto Vasconi, Alejandro Garro, Carlos Krawczenko and Carlos Lasgoity ).

Banner announcing the event. Courtesy RAA.

The program began at 16 pm (English official, 12 am in Argentina). After some minor technical problems the conference began at 16:40. The connection was extended for four hours continuously, but as usual in this type of meeting, time flies. This time the name of "international" acquired its full dimension, since the participants (31 in number) came from five countries: Spain, France, Argentina, Colombia and Uruguay.

Screenshot just started the session with Netviewer, showing the desk of Robert Vasconi. It welcomed the participants and presented the agenda of the day.

Roberto Vasconi, coordinating the connection from his observatory IO. Image Credit Roberto Vasconi.

The general coordinator, Carlos Krawczenko, partner in Double Star Section of the LIADA , opened the session with an introduction to the double stars. Then, Carlos Lasgoity, acting as the presenter, gave way to the exhibitors. The conference program, in order of appearance, was as follows:

Rafael Benavides Palencia: Double Stars photometry with astrometric and Seals II.

Edgardo Rubén Masa Martin: extinction and interstellar reddening.

Florent Losse: speckle interferometry with Reduc.

Juan Luis Gonzalez Carballo: Project Overview SEDA-WDS.

Rafael Benavides gave a lecture very practical and very interesting. We demonstrated the accuracy of photometry obtained using the programs together and Seals II Astrometrica about our images of double stars. Rafael conducted a study on this question a few months ago and compare their results with the photometry of professional catalogs. On average, the difference between the two values \u200b\u200bis around 0.2 magnitudes, which is very good, considering that no photometric filters were used. The idea is to improve the photometric data of the WDS catalog, which often are wrong, inaccurate or missing. And all using an easy to implement and affordable for any amateur. The results of this study were published in the OED number 2.

As far as I'm concerned, I spoke about the importance of correcting the photometry for the effects of extinction and interstellar reddening, at the time of astrophysical studies of the components of double stars and and the tools we use in Section Doubles from LIADA for estimation.

home presentation that all exhibitors use in our operations. Design: Juan Luis Gonzalez Carballo.

home my presentation.

in full fatigues. From time to time, my son Adrian surti me some refreshing snack.

As in June, also a translator I live during the conference Florent Losse, who left us dazzled everyone with the precision of speckle measures using the new version of NR that has been programmed. This software version was presented at the II INTERNATIONAL MEETING OF DOUBLE STAR OBSERVERS (Pro-Am), held in Sabadell in October. Notice that I'm working on the French translation of the manual for this new version will be available shortly.

Finally, Juan Luis Gonzalez Carballo, officially launched the Project SEDA-WDS our fellow southern hemisphere, with particular emphasis in the southern division of the project. Also, used to report new observational campaigns (Cancer borealis, Musca, southern) that will be released within days. In closing his speech, forward and scoop the summary of the number 6 OED we finalized and that will be available next January 6.

From here, I want to thank the coordinators for the great effort that everything went perfectly. Undoubtedly had a huge buzz in the "kitchen" for outside in the "restaurant", table cloth and dress lucieran. Thank you all.

Ultimately, an unforgettable evening in good company held under the framework of a common interest and full of good vibes. Here.

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DOUBLE STARS HAVE A FRIEND IN ARGENTINA ...

I have a friend in Argentina a few days ago has been a dream come true seeked. The dream that all the stars crave crazy one day achieve: a fixed place where one can share their secrets, face to face with the immensity of the night. Roberto Vasconi already reached that point ... Magic, I would say, which one is invaded by sensations never experienced, but no less anxious. And is that when one crosses the threshold is like stepping into a hidden dimension, in a sanctuary or sacred place, where the silence, the serenity, calm and is the birthplace of space and time.

Yes, I have a friend in Argentina that has finally started taking his robe and it is an autonomous member of that community to elect that when the night skies open up a window to spy on the stars. Welcome, friend Roberto. IO Astronomical Observatory, that the name from the November 27 resonates in Villa Allende, Córdoba Argentina on the same name. That day, the opening of the observatory, I had a horse between Spain and Argentina and that even though the distance. Perhaps because he has lived in my own flesh a few years ago, I spent the whole day thinking about my friend and his new observatory. Although not physically, then in essence, been there accompanying my wonderful colleague in his day. Excitement, enthusiasm, pride in how well done, to see finally materialized an idea, a project. The feelings are even more intense when you're the architect of the observatory itself, when the shape, size, mechanisms, which initially are just pure brain power, manage to break the three-dimensional environment that surrounds us, through the efforts , tenacity and strength of our hand, the work submitted. Surely my friend Roberto Vasconi and not remember those long hours spent at the workshop, uncertainties or difficulties that sometimes erupt on the road. The compensation of all these efforts has come, as I say, day 27 last month. This calendar does not fly leaf blown by the wind like chaff summer, on the contrary will be kept in a safe place where it is protected from oblivion, where it will yellow over time together with the guardian: heart of my friend Roberto.

Overview of the IO Centre.

The observatory's main telescope.

The dome stands proud on the construction of Villa Allende.

The opening, as is law should proceed in a company. It is an auspicious day to share with friends, more than usual, our joy. And for lunch and bring in harmony and fellowship with those who share our special way of seeing life. And of course, what better day to express our appreciation to wives, girlfriends, sisters, for your understanding and support? Kiss a sense of gratitude that comes from the soul.

the background, leading the food of brotherhood, Roberto Vasconi.

They are important.

words of thanks from Robert Vasconi.

Did not I say? I have a friend in Argentina since its hemispheric space will share the dance of the double stars the tango is more torn. Roberto, my most emotional greetings. You're a big guy. far.

Dell Webcam Draiverid

TELESCOPES, MOUNTS AND OTHER DEVICES

This was the title of the lecture I gave on Friday 26 afternoon in the Faculty of Valladolid, as part of programming in Syrma Astronomical Society and the University Group are Astronomy developed in this first part of the season.

Actually, the talk is included in the Course of Introduction to Astronomical Observation traditionally provided by these dates. Here you have the poster anunciador, aprovechando para felicitar al responsable de su edición: me encantó tener como fondo el telescopio de Herschel.

La planificación de la jornada pretendía hacer un repaso por todos aquellos instrumentos que el astrónomo aficionado que se inicia tiene a su disposición: telescopios, monturas, oculares, etc. Para ello, además de una presentación multimedia, montamos en el aula varios tipos de telescopios con la intención de que los asistentes se hicieran una mejor idea de lo que se estaba hablando. En definitiva, a sort of lecture-lecture-workshop-class.

I think the thing was animated and entertaining. At least so it seemed from my position on this side of the dais. In particular, I was struck by the fact that among the attendees, there was a wide range of ages, showing that astronomy is primarily generational. And union nexus and good people. Here.

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LECTURE II MACRO CARLOS SANCHEZ (iii) LECTURE II

Tonight I arrived home with a special taste with a pleasant feeling, but difficult to explain, happy, come on. It was seven thirty in the afternoon when Ines Rodriguez was the starting gun by opening the last session of the Lecture Series Carlos Sanchez Magro 2010. In the auditorium of the Museum of Science could not be a pin, public assistance has been massive bet that record. Following the intervention of Agnes, my mate Fernando Cabrerizo officially presented to the speaker. And he did it for two reasons: first, by being an active part in organizing this lecture series, and second, as a matter of cultivated and mature friendship with the guest speaker. Pablo Santos Sanz studied physics at Valladolid University and then moved to Tenerife for his undergraduate thesis at the Instituto de Astrofisica de Canarias on the comet Hale-Bopp. He was then the Institute of Astrophysics of Andalusia (IAA) of the CSIC, in Granada, where he did his doctoral thesis on trans-Neptunian objects and Centaurs and where currently working as an astrophysicist (these days is aimed at the Observatoire de Paris-Meudon, to complete a period of two years). Specialist Solar System minor bodies, has participated in many international conferences on the topic and published many articles in international journals. Has conducted various outreach activities and science communication in the form of lectures, conferences, articles in magazines and newspapers, book collaborations, interventions in radio, television, etc. Not forgetting their cooperation in this wonderful program, the podcast astrophysicist Through Universe, which for four seasons was the delight of hearing innumerable worldwide. In this connection, I said that when traveling abroad to attend conferences or the like, many people come to greet you because they remember from when I did the program.

During his student days in Valladolid, Pablo Santos was a member of the Astronomical Society Syrma and with Fernando Cabrerizo and other members and veterans and still active, actively participated in the activities was then developed. For example, was the editor and in charge of the section Ephemeris the Astronomical Journal Bessel published by the Association every two months. Hard work no doubt, if we note that the layout was typed and the final run of each issue was made to blow photocopy. What time! Look.

Paul

is an astronomer at birth. Okay, okay, now is professional and has the opportunity to work full time on his passion. But he has never forgotten his roots or his fellow adventurers enjoying astronomical and recalling anecdotes from those early observations. You need only hear him talk to realize that it is an inveterate lover of the sky and I know that after their daily work, full of data and CCD images, look at the sky every night for the sheer pleasure of it, for that irremediable ancestral attraction that surrounds him. And you'll note a special sensitivity, is an astrophysicist of different stuff. An example: After the conference, a gathering that we had, he told me he would like visit my observatory. It will not be sick of seeing observatories! No, I meant it, and with enviable enthusiasm. When you want Paul. Personally, I met Paul Saints in the Pro-Am Congress Cordoba last year. Rather, I knew it to me: "Let's see who among you is the pucelano of double stars?".

If I asked for a title that define today's conference would be this: mainly didactic. And this description there has been nothing that has begun to talk about who brought prepared: the ends solar system.

A moment of conferecnia. So the shirt looked Pablo Santos was astronomical. In particular, a kind of obituary about Pluto, the dethroned.

With a thread that has been listing hooked it easy and fun each and every one of the objects that populate the solar system. Planets, asteroids (main belt, Trojans, Centaurs), comets, meteoroids ... So up to the border: Neptune. What lies beyond? And we have been heavily involved in the current area work, trans-Neptunian objects (TNOs). Myriads of small bodies far away located at 30 times the Earth-Sun distance, 30 astronomical units, and therefore move very slowly, dark and cold (about 220 degrees below zero) inhabit the outer regions of the district, solar Kuiper belt and beyond the Oort Cloud. "All these bodies are like the debris of a work" the remnants of the solar system's formation. And it is so important their characterization: the original and uncontaminated material that formed the planets by accretion processes. Over billions of years have been in the fridge in a place so remote that solar radiation reaches them so weak they can hardly alter the physicochemical properties of their surfaces. The first confirmation of the existence of these bodies occurred in 1992 when Jewwitt and Luu discovered the first CCDs, 1992QB1. Since then there cataloged more than a thousand and there are precise orbits for a hundred.

One easily can imagine Pablo Santos with a pickaxe carefully excavating an archaeological site in huge quantities and the oldest of all: in his words, "My job is how to make archeology own solar system. " The research suggests that these bodies are composed primarily of water ice, but due to their low brightness is difficult to detect, except larger. also the largest methane, CO2, CO and rocks. They are very dark bodies that reflect a fraction of sunlight. It appears that such low reflectivity (albedo) is caused by cosmic ray bombardment (irradiation) on certain carbon-based compounds that cover its surface. To study these properties are used several complementary ways. Sometimes, these objects have their own satellites. This allows us to know fairly accurately their mass and density. In this sense, the observations indicate that bodies are fragile and easily deformed by the effect of its own rotation. They may even cause fractures in the crust and result in cold volcanoes (cryovolcanism). On the other hand, one can observe occultations of stars by these bodies and by the light curves of eclipses can deduct their diameters, discover and detect any satellite atmospheres. I do not deny that it is not exciting work.

Indeed, we commented that tonight the object Eris could hide a star in the Southern Hemisphere and rubbed his hands thinking the results of those observations.

Typical Structure of TNO.

Today

Pablo Santos uses data from the Herschel Space Observatory, ESA's , noting the cold universe, ie in the far infrared. Within a few years, in 2015 the New Horizons probe reach Pluto, the "object maladjusted" , and in situ reveal new avenues of research important.

This is the type of infrared images you work with Pablo Santos. In the center the object Orcus.

When Paul finished his speech given by a roar of thunderous applause (and durable) to flooded the auditorium space. Simply put, people who have attended today has been delighted and this was his way of thanking spontaneous visiting lecturer who has served his city to approach-a giant step that part of the Solar System so inhospitable and unknown to majority. And that has made it easy, "as if I told it to his own mother" . Thanks Paul. Then the usual question time, also very entertaining and greetings, congratulations and photos of rigor. Finally, an afternoon round.

family photo with a few of his former colleagues Syrma.

I would end up leaving the suggestive and last slide of the conference and the final reflection of Pablo Santos. Luckily I found on the Web something he said in an interview with him at the University Carlos III of Madrid, which is essentially what he wanted to convey to end today. Invites reflection. Enjoy it. Here.

"I always like looking at the sky to think that necessarily makes us better people, in the sense that learning about the cosmos, we put in place that actually deal in the universe. Inhabit a speck of dust orbiting a star yellow dwarf star we call Sun That star turn is located on the outskirts of a galaxy we call the Milky Way galaxy that contains within it thousands of millions of stars, a galaxy which is one among thousands of galaxies. Look at the sky necessarily gives us a lesson in humility. It is still incredible, wonderful, that being who we are and be where we are, we glimpse and perhaps come to understand a little of that immensity that surrounds us, that immensity which we call the universe. "

Pablo Santos Sanz.

Updated 09/11/2010:

Pablo Santos sends the premise that eventually the TNO Eris hid a star of magnitude 16. The phenomenon was observed from Atacama with a 40 cm robotic telescope of the Astrophysical Institute of Andalusia. Contributors: José Luis Ortiz, Nicolas Morales, Audrey Thirouin, Rene Duffard and Pablo Santos himself. Here you have the video of the occultation. Thanks Paul, and that this success culminates in major results.

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CARLOS SANCHEZ LEAN (ii)

Yesterday evening we enjoyed the second conference of the cycle. As rapporteur, we have the presence of one of the leading English astrophysicists. The curriculum Battaner Eduardo López , Burgos-blooded, it is impressive in every way. Although he describes himself as a "born teacher" , truth is that it emphasizes-much-as a popularizer and researcher. He is currently Professor of Astronomy and Astrophysics at the University of Granada. But not to stay all the ink, I would urge you to visit his personal web page , where he tells us all the details of his career in a fun and easy.

It so happens that Edward Battaner was a personal friend of Carlos Sanchez Magro, so its presence in Valladolid to give a lecture in honor of his colleague, was charged with emotion.

As usual, Inés Rodríguez Hidalgo , director of the Museum of Science, opened the session with another of his brilliant performances. Again, public assistance was a resounding success, demonstrating that this type of calls is very attractive and far outweighs the energy spent in its organization and coordination.

Ines Rodriguez presented to Professor Battaner .

Battaner brought a conference entitled History of Cosmology , history undoubtedly exciting. His presentation focused on modern cosmology, that is, bounded from the publication of General Theory of Relativity Einstein to today. The presentation used teaching resources (anecdotes, curiosities) that served to make more bearable the concepts explained, sometimes, the depth of these inherently intractable or unintuitive, and always using a language close and accessible.

The start of the conference.

In his talk, Dr. Battaner made a thorough review of all cosmological theories, under general relativity, appeared for most twentieth century. The diverse sample of these cosmological models fruition, as we know, in theory universally accepted, and today that best explains the observations: the Big Bang model. As with everything, there are always detractors and Battaner recalled at this point a quotation from St. Augustine, saying "heretics are needed" , meaning "in my opinion-that is always beneficial to any for the sector disagree rest of the scientific community does not rest on its laurels. Sequentially, in chronological order, the teacher told us about the Static Universe and the Cosmological Principle, the primeval atom Hypothesis, Steady State Model, primordial nucleosynthesis, the prediction of the microwave background radiation and subsequent detection, Cosmic Inflation and the accelerating expansion of the universe (dark energy). But is that theories are made by men, scientists, and they, with their shortcomings or their touches of genius, step by step, falling and rising again, make it possible to reduce the observed in nature to language that, if On success, being considered as a physical law. Thus, the conference recalled the characters that put the building blocks of current physical cosmology, from a relativistic point of view: Einstein, de Sitter, Curtis, Shapley, Friedmann, Hubble, Lemaître, Humason, Zwicky, Bondi, Gold, Hoyle, Gamow, Alpher, Penzias, Wilson, Guth. Some, predominantly theoretical, others bitter observers, but always complementary and aimed towards a common goal: understanding the large scale structure and dynamics of the universe, its origin, evolution and destiny. As Einstein said, "the most incomprehensible of the universe is that it is comprehensible" .

An expressive time of the conference.

A In my view, one issue that caught the attention of the audience was that of dark energy. It seems that the universe is expanding faster and faster and this effect is well explained by introducing dark energy as a repulsive gravitational force that accelerates the expansion. Thus, the "biggest mistake" Einstein-his cosmological constant, appears to be the end of the day a crazy idea. As said Battaner, "Einstein was right even when you make a mistake."

listening very concentrated Battaner one of the questions from the audience.

Syrma The librarian Battaner took several books for us to sign.

Portrait of family with some friends.

The turn to questions, was very lively, as the subject goes a long way and try many concerns and is appealing to the audience: How will the Universe end?, "Will expand forever?, Does our , is part of a larger multiverse? ... In short, we live an exciting time and I am sure that each of us went to our corner of the universe urbanite forcing our brains to these cosmological issues. In my case, I thought late last night in my universe, and that too in my time-space location, at six in the morning, inevitably, the alarm compressed air with its usual buzz. I'm here.

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LECTURE II CARLOS SANCHEZ

On Tuesday evening I attended the opening of II Lecture Series Carlos Sanchez Magro , that for the second consecutive year is held in memory of the eminent astrophysicist Valladolid and is managed by the Science Museum of Valladolid the Syrma Astronomical Society and the University Group Astronomy . The lectures are held in the auditorium of the Museum of Science and this year has three very interesting intervention that I will comment on here as they are celebrating. By the way, before continuing I would comment that if there is already a professional telescope at the Observatorio del Teide and an asteroid named for Carlos Sanchez, city \u200b\u200bof Valladolid, about a year ago, also wanted to acknowledge this distinguished astrophysicist by naming a street in a newly created district. Not only that, but the streets have names such astronomical development. No doubt a nice initiative. Here's proof: a few months ago I left as the street reporter in question is near my house.

Carlos Sanchez Street in Valladolid.

A new astronomical neighborhood whose Main Street is Carlos Sanchez.

Cycle Poster announcing .

The first lecture was given by Roi Alonso Sobrino, a young astrophysicist also Valladolid, whose career full of successes, is now unstoppable. I already mentioned something about Alonso here a few months ago. Today, still working as a researcher in the mission Corot . In a paper entitled Exoplanets: Chronicle of a discovery announced and many unexpected , showed us all the intricacies of their work, involving the detection and characterization of extrasolar planets in solar-type stars using the transit method.

home presentation.

could say that this is one of the disciplines of fashion in astrophysics. The search for extrasolar Earth-like planets located in the so-called habitable zone (planet-star distance should allow the existence of liquid water) is one of the main objectives pursued today.

A moment of the conference. Roi Alonso was speaking here of Otto Struve, a true visionary who in 1954 predicted the existence of planets outside the solar system and advanced techniques for possible detection.

seems logical to assume that terrestrial planets are in orbit around dwarf stars and relatively cool (as in the case of the Sun), and even dwarfs or M-type K (the latter are most abundant in the galactic census), among other things because the debris after the formation of the parent star will be relatively large and therefore the presumed protoplanetary disks that comply will result in smaller planets. On the other hand, the mass of a planet suitable for life should have a mass of between 1 and 10 times the mass of Earth, be able to hold its own atmosphere and not be so massive as to contain too much hydrogen. Obviously, all these assumptions are based on the pursuit of "life" outside the solar system based on carbon. In the words of Roi Alonso "what we know."

The speaker also said that during research study are other parallel lines and unexpected. Such is the case to draw conclusions about their own spots, "sun" of the host star when a planet passes in front of them during transit.

The conference was enjoyable and was perfectly exposed. Ended, as usual, with a round of questions from the audience nurtured. As for me and given my interest in the topic, the speaker asked about the possibility of the existence of habitable planets in binary systems. All have in mind, thanks to science fiction movies, beautiful sunsets with two stars in the sky. I said was an interesting question and that indeed, given their abundance, many double stars that fall under the detectors. In very tight binaries hypothetical planets in orbit would be subject to extreme conditions with continuous barrage of radiation and stellar wind that would alter their atmospheres, while its dynamics would be very unstable and crashes frequently occur. The planets could be thrown into outer orbits which could perhaps achieve some stability and orbital but outside the habitable zone. In separate binaries orbiting planets could independently to each of the stars of the pair, while they do the same around the center of mass. Perhaps this case, in a very general, may be most favorable to host habitable planets. Simulations have been performed with models of the most varied configurations and the problem is highly complex, although I think the observation, sooner or later, give solutions. Only a matter of time. No one imagined before 1995 that, today, would have counted nearly 500 planets around other stars. Here.

Posing with Roi Alonso.

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II MACRO INTERNATIONAL MEETING OF DOUBLE STAR OBSERVERS (Pro-Am)

Updated 30/10/2010
This weekend has been an important event related to the double stars. Organized by the Astronomical Association of Sabadell and Garraf Astronomical Observatory, was held in Sabadell II Meeting of Double Stars Observers (Pro-Am) . The meeting brought together twenty experts in double stars from Catalonia, France and England. As an addition, it was expected that Brian Mason himself from Washington, to intervene through videoconferencing, but ultimately the virtual connection has taken place. However, the organizers have received a written contribution from Dr Mason, which has been read in one session. The program of papers and contributions have been extremely interesting and varied. They have released a lot of work and cutting-edge projects in the field of double stars that are currently developing both amateur and professional.

Unfortunately, I was unable to go to Barcelona to attend the conference. If I'm honest, I've been all weekend circling the subject, it was a wonderful chance to meet in person with great friends and fellow Europeans with whom I maintain a regular relationship. Despite my natural frustration, I had the opportunity to get me in some ways the thorn that stuck was: Today, a little before 14:30, got a call from my partner Novalbos Ignacio, who has spoken in Meeting with the contribution entitled Image Reduction Methods and Their Influence on the Theta / Rho Measures. I emphasize that made me look forward to talking to him and tell me first hand, and with a great deal of euphoria, of course, his impressions of the meeting of doubles player. Thanks Nacho!. To make matters worse, it has been since my French colleague to your Florent Losse . During We exchanged a few moments touching words, and that despite my clumsiness today to speak French has become much more apparent than usual. Even so, we have understood perfectly. Florent has given a presentation ( Interferometry with mid-sized amateur telescope, why not? ) and made the official presentation of its new version of NR. The software we all use to measure double stars is now able to exploit the speckle interferometry technique with great efficiency and speed. With this new and elaborate version are wide open and promising horizons for amateurs and will be a revolution. Time. In the manual will be available shortly in Castilian, as usual translate from French in collaboration with Florent.

My friends Florent Losse (left) and Nacho Novalbos (right). At first glance clearly shows the atmosphere of camaraderie and complicity among my colleagues.

Image credit: Nacho Novalbos.

would not elaborate any further. I think it is fair that those who have been lucky enough to attend tell us about their experience because they are the true protagonists. Be aware, for sure Ignacio Novalbos that makes us an excellent review on his blog full of pictures and comments and succulent shades. Well, just forward and scoop it appears that this meeting will be from now on a biennial basis (remember that first edition was held in 2000 in Castelldefels). Excellent news, indeed. We will have to do everything possible to go to France in the next edition. Here.

Participants at the Second Meeting DSO. Image credit OAG

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LIFE IS PURE THEATRE

At this point in the function one is sure that the things he does makes for pure pleasure is a matter of personal delight. The enjoyment is immense, pure passion, without more, the sensations in a space framed addictive, dark night, same paragraph, where a baby is the star to lose consciousness. And the drunken-long I know, "always with me. There is no possibility of returning to "normal" but I assume, with integrity, everyone lives their life as it was served. One does not pursue flowers or clapping or reward, has more than enough to indulge desired.

However, on rare occasions our business, and beyond disclosed, and even refereed and assessed by outsiders. Obviously, I will not deny it, praise or recognition are things that are pleasing and are the ideal stimulus to face new business with renewed vigor. Valiéndome the theatrical metaphor with which I began I would say that, after the applause, the comic is already thinking about the next performance, to give it all back and as visionary by the mere desire to excel in bet heavily on unpublished scripts where they could act out the roles to the point believe them and make them yours. So relentless, every night, takes the magical ritual: makeup, props, characterization ... Is everything ready? Top The curtain then.

These reflections are collating a few days ago the critics were kind to my last show (read here: my latest article published in JDSO double stars). By private communication I received a letter signed by Brian D. Mason, WDS catalog administrator, who congratulated me for this work and let me know that my measures were added to the catalog. Another objective was to update the movements of the components of STI peer through consultation via the catalog UCAC3 Aladin (and in his absence the PPMX / PPMXL). I have checked with satisfaction that all the values \u200b\u200bthat I included in my last job have also been added to WDS. Have a notion of the proper motions will help to assess first the nature of double stars of Stein. So in the next series of steps, to complete STI catalog, I will make this task equally, although it is somewhat laborious, it seems very interesting.

Regarding the fate of the two pairs that I proposed as new discoveries, Mason also told me that MRI 5BC your email already exists in the WDS OL code 199AB. At first glance it might seem like an oversight on my part and may also have acted tachárseme too lightly or lack of rigor. But everything has a logical explanation and is unacceptable. Let's see. When one detects a pair of stars may constitute a new discovery, the immediate passage (in its most literal sense) is to consult the catalog to see if the couple is listed by another observer or, conversely, the list does not exist any pair in the position. And, of course, so I did. In the reduction of the images used 2008 version of WDS for March 2009. In it, STI 216 and OL 199 were listed as two independent and unrelated to the identifiers WDS01274 WDS01274 +5955 and +5956 respectively. On the other part, I have the healthy habit of asking the USNO archive file of measures for each of the double stars I measure or study. This helps me to check the trend of the measures over time and, at the time, I can evaluate the quality of each of the measures carried out CCD. When I received the file of the measures of STI 216 did not indicate any other major component, so obviously I decided to go ahead with the study of the new component C that appeared registered in my images.

of curiosity, I delved into the history of OL 199 in a very rewarding activity detective (this is a facet of double stars that I love: its history). ADS Consulting found that OL 199 was discovered by Charles P. Olivier in 1928 with the 66 cm refractor of the Leander McCormick Observatory the University of Virginia. The discovery of this and other 16 pairs were printed in the Astronomische Nachrichten 233, (AN) the year of 1928 and the title of Measures of 357 Double Stars.

On page 411-412 is listed as (taken photographically) of what became OL 199.

Indeed, although shown as separate systems, STI OL 216 and 199 share one of its components and, therefore, should have been classified as a triple system, but it seems that neither Olivier or catalogers then realized this fact. And so the two couples have coexisted over the years.

During the reduction of my images, the subsequent writing of my article and the subsequent wait until the publication in JDSO, the error was detected that I said and proceeded to update the identifiers to record that are members of a three component system. Although I have no certainty, I am inclined to think that in fact the case was revealed following the presentation of my MRI 5BC. In any case, if the WDS now consult on the newest version found that STI 216 has been renamed STI 216AC, while 199 is now OL OL 199AB and both pairs look the same code on the catalog index: WDS 01274 +5955. The reason for this is that renewed nomenclature has also been corrected Investment quadrants observed in STI216: the former component B is clearly more brilliant than the A. For this reason, and rightly, now the leading pair of the system has become OL 199, on the other hand, is most interesting as I indicated in my article that his own movement seem to share components.

In any case, I am satisfied because the MRI failed 5BC has served to confirm my certain criteria when selecting a new pair likely to be classified and, of course, to debug the WDS, and has an error less. Cases such as this and other natures are widely varied and is another useful task that can play, besides being tremendously entertaining.

As MRI 6, my other nominee, now it has been included in the WDS catalog all of the law. Here I show you entering the Catalog Index:

frantic few days I've been measuring my images of 2009, there is a good choice and I would remove them in the next issue of OED. If I have no choice: As the bolero, "theater, life is pure theater ..." . Here.