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SETI Institute Undertakes Search for Alien Signal from Kepler Star KIC 8462852
by BOB KING on OCTOBER 21, 2015


Tabby's star official website

One of the 42 dishes in the Allen Telescope Array that will remain trained on KIC 8462852
through the end of next week gathering fresh data on the enigmatic star.
Credit: Seth Shostak / SETI Institute

Wiki-pedia Article on KIC462852 "Tabby's star"

Comet or Alien Megastructure? by BOB KING on OCTOBER 16, 2015

Something other than a transiting planet makes KIC 8462852 fluctuate wildly and unpredictably in brightness.
Astronomers suspect a crumbled comet, but the cause remains a mystery.
Credit: NASA

Do Comets Explain Mystery Star’s Bizarre Behavior? by BOB KING on NOVEMBER 25, 2015

This illustration shows a star behind a shattered comet. Observations of the star KIC 8462852
by NASA’s Kepler and Spitzer space telescopes suggest that its unusual light signals are likely from dusty comet fragments,
which blocked the light of the star as they passed in front of it in 2011 and 2013. The comets are thought to be traveling
around the star in a very long, eccentric orbit.
Credit: NASA/JPL-Caltech

Here is a report on KIC 846252 has been fading!

Astronomy Cast Ep. 388: Megastructures by FRASER CAIN on OCTOBER 19, 2015

This week astronomers announced an unusual transit signal from another star. Although it’s most
likely a natural phenomenon, one remote possibility is that this is some kind of alien megastructure.
Freeman Dyson and others have considered this idea for decades. Today we’ll talk about the kinds of structures
that aliens might want to build.

Science Casts: Sizing up an Exoplanet

Published on Aug 18, 2014 Visit for more. Astronomers are not only discovering planets around distant suns, they are also starting
to measure those worlds with astonishing precision. The diameter of a super-Earth named Kepler-93b is
now known to within an accuracy of 148 miles. Category Science & Technology License Standard YouTube License


SThe Allen Telescope Array (ATA) is a “Large Number of Small Dishes” (LNSD) array designed to be highly effective
for simultaneous surveys undertaken for SETI projects (Search for Extraterrestrial Intelligence) at centimeter wavelengths.
Credit: Seth Shostak / SETI Institute

Radio waves absent from the reputed megastructure-encompassed Kepler star?

Radio observations were carried out from the Allen Telescope Array of the reputed megastructure-encompassed star KIC 8462852.

Fig 1 from Harp et al. (2015) conveys the lack of radio waves emerging from the star KIC 8462852 (black symbols),
however there were sensitivity and coverage limitations (see text). The signal emerging from the quasar 3c84 is shown via blue symbols.

SETI Searches 'Alien Megastructure' For Signs Of Intelligence;
Results Of The 'Most Mysterious Star In The Universe' Could Come This Week

The hunt for an alien megastructure has made for sensational headlines, but what are the chances of finding something?
Pictured is an artist's impression of Kepler, the spacecraft that observed the distant star KIC 8462852.
NASA Ames/JPL-Caltech/T Pyle

SETI Researchers Find No Sign of Aliens at KIC 8462852 ... Yet by Keith Wagstaff

What Is an Exoplanet? Alien hunters have been training their telescopes on the mysterious KIC 8462852 star system
for more than than two weeks, and so far it looks like extraterrestrials aren't home.

SETI says KIC 8462852 isn't sending Extraterrestrial Laser Pulses

However, alien enthusiast claim that the alien civilization might be advanced enough to use other means
of communication than laser pulses and radio waves, so they're still holding out hope that E.T. might be in our vicinity.
A mysterious star that erratically dims by almost a quarter as a swarm of unknown objects passes in front of it -
leading to speculations that artificial objects could be orbiting the star - continues to refuse to give up its secrets
after a search for laser pulses from the system turned up empty.

Ever since it was first announced in 2015, there has been speculation as to what could account for the dimming of KIC 8462852.(artist Concept) Credit:Sentient Developments.com

Another theory on Tabby's Star

"Still Most Mysterious Star in Universe"
--SETI Telescope Array Followup Fails To Detect Megatructure Swarm May 10, 2016

Even if aliens are not involved, Tabby's star remains "the most mysterious star in the universe"
as Yale astronomer Tabetha Boyajian described it in a TED talk she gave last February.
"The dips found by Kepler are real. Something seems to be transiting in front of this star
and we still have no idea what it is!" says German astronomer Michael Hippke.

The most remarkable of these fluctuations consisted of dozens of uneven, unnatural-looking dips
that appeared over a 100-day period indicating that a large number of irregularly shaped objects
had passed across the face of the star and temporarily blocked some of the light coming from it.

The attention caused scientists at the SETI Institute to train its Alien Telescope Array
on the star to see if they could detect any radio signals indicating the presence of an alien civilization.
In November, 2015 it reported finding "no such evidence" of signals with an artificial origin.


Artist's impression of a gigantic ring system around a distant exoplanet. Credit and ©: Ron Miller

An artist impression of an exomoon orbiting a ringed exoplanet. Credit: Andy McLatchie

What Is A Dyson Sphere?

Published on Sep 19, 2013 A Dyson Sphere is a megastructure that could be built around a star to harness all the solar energy it gives off.
In this video we talk about the different kinds of Dyson Spheres, Dyson Clouds and other megastructures that could be built -
and how we might even detect them from Earth.


Artist's concept of KIC 8462852, which has experienced unusual changes in luminosity over the past few years.
Credit: NASA, JPL-Caltech

Photometry of KIC8462852 obtained by the Kepler mission, showing a period of more rapid
decline during the later period of observation. Credit: Montet & Simon 2016 As Dr. Montet told Universe Today via email: “Every 30 minutes, Kepler measures the brightness of 160,000 stars in its field of view (100 square degrees,
or approximately as big as your hand at arm’s length). The Kepler data processing pipeline intentionally removes long-term trends,
because they are hard to separate from instrumental effects and they make the search for planets harder.
Once a month though, they download the full frame, so the brightness of every object in the field can be measured.
From this data, we can separate the instrumental effects from astrophysical effects by seeing how the brightness of any
particular star changes relative to all its neighboring stars.”

Tabby's Star

Published on Aug 4, 2016 A in-depth look at KIC 8462582, also known as Tabby's Star. We'll explore how this star became
famous for an anomaly, what that anomaly was, and the various theories for what might be causing it. Listen or Download the audio of this episode from Soundcloud Support the Channel on Patreon: Cover Art by Jakub Grygier: Recent Developments: 5 Aug 2016 some new research came out the same day as the video, in terms of the overall dimming, Paul Gilster discusses it here, and Centauri Dreams is an excellent place to keep up on new developments as they occur: Category Science & Technology License Standard YouTube License

Tabby's Star: Berkeley investigates mysterious star

Published on Oct 25, 2016 Tabby's star has provoked so much excitement, with speculation that it hosts a highly advanced civilization
capable of building orbiting megastructures to capture the star's energy, that UC Berkeley's Breakthrough Listen project
is devoting hours of time on the Green Bank radio telescope to see if they can detect any signals from intelligent extraterrestrials. Breakthrough Listen, which was created last year with $100 million in funding from the Breakthrough Prize Foundation and its founder,
internet investor Yuri Milner, won't be the first to search for intelligent life around this star.

Tabby’s Star shines at magnitude +11.7 in the constellation Cygnus the Swan (Northern Cross) high in the southwestern sky at nightfall
in late October. A 6-inch or larger telescope will easily show it.
Source: Stellarium


Artist's concept of KIC 8462852, which has experienced unusual changes in luminosity over the past few years.
Credit: NASA, JPL-Caltech

Preliminary analysis of incoming data of KIC 8462852, showing the apparent dip. Credit: Matthew Muterspaugh/Tennessee State University/CEISEM

Tabby's Star is dimming right now (archived video of chat with Jason Wright)
May 22, 2017

Streamed live on May 19, 2017 Tabby's Star (aka the WTF (Where's the Flux) Star, Boyajian's Star, the Most Mysterious Star in the known Universe) is entering another of its irregular dips. Here at UC Berkeley SETI we're lucky to have Prof. Jason Wright visiting this week. Join him and Berkeley SETI Director Dr. Andrew Siemion at 11 Pacific for live updates. Tweet your questions @BerkeleySETI. Category Science & Technology License Standard YouTube License

Diagram of the KIC 8462852 system, showing the possible influence of Trojans on its brightness. Credit: F. Ballesteros et al.

Short Summary of the current Natural Theory

“Whereas most of the scenarios that have already been discussed by other authors invoke the presence of astronomical objects that have never been directly observed, from the comet clouds in Boyajian et al. (2016) to the Dyson sphere in Wright et al. (2016), our model requires the presence of relatively familiar objects, namely a large planet with orbiting rings and a cloud of Trojan asteroids. Moreover, our model allows us to make a definite prediction: the leading Trojan cloud should induce a new period of irregularities in the light curve approximately in 2021.” Jason Wright's Website


This illustration depicts a hypothetical uneven ring of dust orbiting KIC 8462852, also known as Boyajian's Star or Tabby's Star. Credit: NASA/JPL-Caltech

The Most Mysterious Star | Prof Jason Wright

Prof Jason Wright from Penn State explains why Tabby's Star has become known as the most mysterious star in the galaxy and how you can help him and Tabby Boyajian solve this mystery. To contribute to their Kickstarter campaign, go to https://www.kickstarter.com/projects/... right now! ::More about this Video:: ► Kickstarter page: Where's the Flux?": ► Boyajian et al. (2016), "Planet Hunters X. KIC 8462852 - ► Wright et al. (2016), "The Ĝ Search for Extraterrestrial Civilizations with Large Energy Supplies. IV.: The Signatures and Information Content of Transiting Megastructures" ► Prof Wright's blog, AstroWright: ► Dr Tabetha Boyajian's TED talk: :► Outro music by Taylor Davis ::Playlists For Channel:: Latest Cool Worlds Videos ►<.A> Cool Worlds Research ► Guest Videos ► Q&A Videos ► Science of TV/Film ► ::Follow us:: SUBSCRIBE to the channel Cool Worlds Lab Twitter Instagram THANKS FOR WATCHING!! Category Science & Technology License Standard YouTube License SHOW LESS

LSU Astronomer Tabetha Boyajian (center) and her students and research staff. (Left to right) Robert Parks, undergraduate student Rory Bentley, Assistant Professor Tabetha Boyajian, PhD candidate Tyler Ellis, undergrad Katie Nugent, Professor Geoff Clayton and graduate student Emily Safron. Credit: LSU

One of the many robotic telescopes part of the Las Cumbres Observatory used to observe Tabby’s Star. Credit: LSU

The most mysterious star in the universe | Tabetha Boyajian

Something massive, with roughly 1,000 times the area of Earth, is blocking the light coming from a distant star known as KIC 8462852, and nobody is quite sure what it is. As astronomer Tabetha Boyajian investigated this perplexing celestial object, a colleague suggested something unusual: Could it be an alien-built megastructure? Such an extraordinary idea would require extraordinary evidence. In this talk, Boyajian gives us a look at how scientists search for and test hypotheses when faced with the unknown. TEDTalks is a daily video podcast of the best talks and performances from the TED Conference, where the world's leading thinkers and doers give the talk of their lives in 18 minutes (or less). Look for talks on Technology, Entertainment and Design -- plus science, business, global issues, the arts and much more. Find closed captions and translated subtitles in many languages at Follow TED news on Twitter: : Like TED on Facebook :Subscribe to our channel


This illustration depicts a hypothetical uneven ring of dust orbiting KIC 8462852,
 also known as Boyajian's Star or Tabby's Star.
 Credit: NASA/JPL-Caltech

Prof Jason Wright from Penn State explains why Tabby's Star has become known as the most mysterious star
 in the galaxy and how you can help him and Tabby Boyajian solve this mystery.
 go to To contribute to their Kickstarter campaign,

::More about this Video::

:â–º Kickstarter page

 â–º Boyajian et al. (2016), "Planet Hunters X. KIC 8462852 - Where's the Flux? (PDF)":
► Wright et al. (2016), "The Ĝ Search for Extraterrestrial Civilizations with Large Energy Supplies. IV. The Signatures and Information Content of Transiting Megastructures (pdf)": 

 â–º Prof Wright's blog, AstroWright:
 â–º Dr Tabetha Boyajian's TED talk:

â–º Outro music by Taylor Davis:

::Playlists For Channel:: Latest Cool Worlds Videos â–º Cool Worlds Research â–º Guest Videos â–º Q&A Videos â–º Science of TV/Film â–º ::Follow us:: SUBSCRIBE to the channel Cool Worlds Lab Twitter Instagram

The light curve recorded for Tabby’s Star. Credit: Where’s the Flux?


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odd star VVV-WIT-07

Image: VVV-WIT-07 in the centre of a star field. Credit: Saito et al. This is fertile ground for discovery, but even so, the object known as VVV-WIT-07 is taking everyone a bit by surprise. We’re dealing with a star that reminds everyone of Boyajian’s Star (KIC 8462852), famed for its unusual dips in lightcurve. Were they signs of a Dyson Sphere under construction, or a natural phenomenon the likes of which we had never seen? Uneven rings of dust, dusty planetesimals or comets are still in contention. Now we have a star that is apparently even more extreme, one whose range in lightcurve variation is extraordinary. Viewed by the survey over a period of eight years, VVV-WIT-07 has been seem to dim first by a factor of 2, then by almost 80 percent. A week later, it was back to normal.

Image: Lightcurve of VVV-WIT-07 showing how it varied in brightness between 2010 and 2018. The insert shows an expanded view of the particularly dramatic dimming event that occurred in July 2012. Credit: Saito et al. Is it possible we are looking at some kind of circumstellar disk with huge variations in it, a clumpy disk that blocks the star’s light in this highly irregular way? The odds on that seem long. Here is what the paper says: Alternative scenarios for VVV-WIT-07 include a “dipper” T Tauri star with clumpy dust structures orbiting in the inner disk that transit our line of sight (e.g. Rodriguez et al. 2017), or even a long period, high-inclination X-ray binary. The deep, narrow eclipse delayed with respect to a broad and shallower dip is reminiscent of the morphology seen in high-inclination low-mass X-ray binaries (LMXB, e.g. Parmar et al. 1986; Baptista et al. 2002). However, LMXBs are restricted to orbital periods of less than a few days while high-mass x-ray binaries (HMXB) can be found at Porb up to hundreds of days (e.g. X1145-619 has Porb = 187.5 d, Watson et al. 1981). Moreover, in this scenario optical and IR spectra would be dominated by the mass-donor companion star, and should show rotationally-broadened hydrogen absorption lines at epochs of no mass ejection episodes, which is not the seen in the spectra of VVV-WIT-07.


VVV-WIT-07: another Boyajian’s star or a Mamajek’s object?? (PDF)

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