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Profile Pierre A Renaud @ team Carl Sagan
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Message 2001135 - Posted: 5 Jul 2019, 4:16:01 UTC

Astronomers Are Baffled by HD 139139, the Most Bizarre Star Yet
Unusual dips of light observed by the Kepler space telescope have so far confounded attempts at an explanation
By Adam Mann on July 3, 2019
https://www.scientificamerican.com/article/astronomers-dont-know-what-to-make-of-this-incredibly-bizarre-star/

"When people in our community hear about something like this, the running joke is it might be aliens," Vanderburg says. The possibility crossed his mind, he adds, as the seemingly-random dips reminded him of the scene in the film Contact in which Jodie Foster's character begins hearing blips from outer space that trace out a prime number sequence.

The newly noticed star will certainly be added to the list of those investigated for signs of technological activity, Wright says. But he considers it more likely astronomers will eventually settle on an explanation that does not involve intelligent extraterrestrials. Boyajian agrees. "I think we have to consider all options before we go there," she says. "This is one of those systems where it's probably not going to be figured out without more data."

Yet few other observatories can match Kepler's extreme precision. Most ground-based telescopes are not sensitive enough to see the involved light dips, and it is difficult for researchers to reserve the relatively long stretches of time they would require on a powerful orbiting instrument such as the Hubble Space Telescope. NASA's recently launched Transiting Exoplanet Survey Satellite (TESS) is not scheduled to look at HD 139139 during its primary campaign, though perhaps if the satellite receives an extended mission it could.

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Message 2001193 - Posted: 5 Jul 2019, 18:44:11 UTC
Last modified: 5 Jul 2019, 18:57:17 UTC

I see what appear to be trends of development in the graph of dips of the star HD139139, which is reproduced in the article linked below. Early on, the largest dips immediately before the largest one of all show a greater and greater dip in light output. These first increase slowly, them more rapidly at the end, which is marked by the deepest dip. From this point on, the largest dips show a trend of gradually lessening in depth. Both the trends of deepening and lessening depths occur over approximately the same length of time.

https://gizmodo.com/freaky-star-seems-to-dim-randomly-and-astronomers-dont-1836045295
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Profile Pierre A Renaud @ team Carl Sagan
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Message 2004252 - Posted: 25 Jul 2019, 20:23:57 UTC

Breakthrough Listen's new search for alien lasers | Space 2019.07.24
https://earthsky.org/space/breakthrough-listen-seti-optical-beacons-technosignatures

For the last few decades, the search for extraterrestrial intelligence has focused on detecting radio signals. But a new collaboration between Breakthrough Listen and VERITAS will focus on looking for laser-like flashes of light.
https://breakthroughinitiatives.org/initiative/1
https://veritas.sao.arizona.edu/
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Message 2010322 - Posted: 1 Sep 2019, 13:12:03 UTC
Last modified: 1 Sep 2019, 13:12:17 UTC

Arecibo Observatory nets $19 million grant to search for dangerous asteroids

NASA has ensured the Arecibo Observatory in Puerto Rico can continue its search for near Earth objects (NEOs) that pose a threat to the planet with a $19 million grant. The fund was awarded to the University of Central Florida, which operates the observatory on behalf of the National Science Foundation.
...
The Arecibo Observatory will also analyze and categorize NEOs to help inform future space mining and sampling missions. "We can use our system to constrain the size, shape, mass, spin state, composition, binarity, trajectory, and gravitational and surface environments of NEOs and this will help NASA to determine potential targets for future missions," says Anne Virkki, principal investigator for the observatory's planetary radar program.

A portion of the $19 million grant will also be used for a STEM education program at the Science, Technology and Research (STAR) Academy in Puerto Rico. 30 high schoolers per semester will learn about the science and research conducted at the observatory across 16 sessions.

The 1,000-foot radio telescope has been in service since the mid-1960s, having served a variety of uses, from determining the rotation period of Mercury to transmitting a bitmap image to hypothetical extraterrestrials 25,000 lightyears away. The facility has occasionally faced financial troubles, but this latest grant will keep the Arecibo Observatory running for the time being.


It appeared a few years ago that Arecibo would end up being closed... nice that it has been revitalized with this search as it will also continue to produce SETI@Home data for us.
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Profile Byron Leigh Hatch @ team Carl Sagan Project Donor
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Message 2010461 - Posted: 2 Sep 2019, 15:22:10 UTC - in response to Message 2010322.  

It appeared a few years ago that Arecibo would end up being closed... nice that it has been revitalized with this search as it will also continue to produce SETI@Home data for us.

thank you Mr. Kevvy I missed that.
have you heard anything if SETI@home will get data for us to crunch from China Largest radio telescope in the World ???
https://en.wikipedia.org/wiki/Qitai_Radio_Telescope

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Profile Gary Charpentier Crowdfunding Project Donor*Special Project $250 donor
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Message 2010463 - Posted: 2 Sep 2019, 15:49:05 UTC - in response to Message 2010461.  

It appeared a few years ago that Arecibo would end up being closed... nice that it has been revitalized with this search as it will also continue to produce SETI@Home data for us.

thank you Mr. Kevvy I missed that.
have you heard anything if SETI@home will get data for us to crunch from China Largest radio telescope in the World ???
https://en.wikipedia.org/wiki/Qitai_Radio_Telescope


Considering our current president, I doubt there will be any sharing of data permitted.
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Message 2010466 - Posted: 2 Sep 2019, 16:08:36 UTC - in response to Message 2010463.  

I think you are probable right, Gary, so sad don't you think?
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Message 2011717 - Posted: 12 Sep 2019, 10:48:56 UTC

The very first post in this thread was about the MeerKAT radio telescope situated near Carnarvon in South Africa, and I'm pleased to report that astronomers using the array have announced their first major discovery.

News article
Nature abstract
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Message 2013563 - Posted: 28 Sep 2019, 1:26:44 UTC
Last modified: 28 Sep 2019, 1:27:49 UTC

Gigantic Chinese telescope opens to astronomers worldwide - 24 September 2019

The Five-hundred-meter Aperture Spherical Radio Telescope (FAST) in southern China has just passed a series of technical and performance assessments, and the Chinese government is expected to give the observatory the final green light to begin full operations at a review meeting scheduled for october.The world’s largest single-dish radio observatory is preparing to open to astronomers around the world, ushering in an era of sensitive observations that could help in the hunt for gravitational waves and probe the mysterious blasts of radiation known as fast radio bursts.
https://www.nature.com/articles/d41586-019-02790-3
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Message 2014000 - Posted: 2 Oct 2019, 16:27:31 UTC

The National Science Foundation has announced that it will finance the Green Bank Radio Telescope 37 million dollars on the next five years.
Tullio
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Message boards : SETI@home Science : SETI & Radioastronomy News 1


 
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