Planet Hunters Talk

Where I can find famous KIC 8462852?

  • DR2073 by DR2073

    Tried to search for it but found nothing =(
    Is there way to look at data for KIC 8462852?
    Article about it:
    http://www.theatlantic.com/science/archive/2015/10/the-most-interesting-star-in-our-galaxy/410023/

    Posted

  • planetsam by planetsam

    Here are the discussions on old talk.

    http://oldtalk.planethunters.org/objects/APH10115382

    http://oldtalk.planethunters.org/discussions/DPH101e830?object_id=APH10115382

    Posted

  • Abe_Hoekstra by Abe_Hoekstra

    Planetsam, you were the first to notice the feature in Q8, and that may have started it all. We all owe you a very big thank you.

    And I want to thank the PH Science Team and everyone involved in the scientific paper about KIC 8462852 as well, particularly Tabetha Boyajian, who wrote one excellent paper, that reads like a detective book.

    For those interested the paper can be found over here: http://arxiv.org/abs/1509.03622 .

    Posted

  • Hildifons by Hildifons

    Excellent news! Congrats to all involved! Maybe the blog should be updated to report this new paper.

    Posted

  • ianhenderson by ianhenderson

    Hi, all. It's a long time since I've been here, but I thought I'd take a peek back here after this broke on mainstream media. I've just had a quick read of the discussions posted above.

    Forgive me if this has been commented on, as I haven't had the chance to absorb the paper (congratulations, by the way).

    Has anyone taken a look at the transit "cluster" centred at Tc=1540.3853034 (from the PDCSAP FLUX, division-normalized, downloaded from http://exoplanetarchive.ipac.caltech.edu/applications/ETSS/Kepler_index.html; long cadence)?

    The set of transits appears, visually, to last from around T=1535 to T=1545 give or take. If you calculate time before Tc as Tc-Tnow and time after Tc as Tnow-Tc ("now" being the row at any given observation time), you can plot the event "cluster" symmetrically around Tc. This gives you two light curve plots: One where time is running "backwards" before the event centre and the second as time running "forwards" after the event centre. You'll need to do that in a spreadsheet; sorry I can't post a picture at the time of writing.

    If you plot the two graphs, then you will see that the light curve before and after the event centre at Tc=1540.3853034 (defined as the point of minimum flux between T=1535 and T=1545) shows two remarkably symmetrical-looking dips centred around T=Tc+/-2.5 days give or take. Indeed, this cluster took my eye immediately I saw the lightcurve.

    In brief, the dip before and the dip after the central-dip-at-Tc look symmetrically timed and nearly identical in depth.

    I haven't found anyone commenting on this in my brief read through the discussions or the paper. Is this coincidental, or indicative of something about that cluster of dips? One thing that springs immediately to mind is that it looks something like I might expect a ring system to show as.

    UPDATE:
    I've added two graphs and (hopefully) a clearer explanation of what I've noticed on my blog (having problems uploading pics here): https://keplersignaldetector.wordpress.com/2015/10/16/a-look-at-one-unusual-transit-like-event-in-kid-8462852/

    I'll add a link back to this discussion from there.

    Posted

  • Hildifons by Hildifons

    I've been checking

    https://www.zooniverse.org/about/publications

    That should be updated too. If it weren't for this thread I wouldn't have known about this new paper.

    Posted

  • Yesh by Yesh

    Incredible! Well done all and honestly I imagine it has done wonders for this program in it's entirety considering I and (from what I can see) alot of other people did not know about planethunter before reading such articles. I just hope all of us joining isn't what is causing the classify program to crash! Thanks all, I'm really excited to be apart of this, having running Seti for the past year or so it is very exciting that us normal folk can be involved in these projects and I hope we discover more of KIC 8462852 secrets (I know what I'm hoping for ha 😛) now its time to read this paper!

    Posted

  • eotunun by eotunun

    A most eldritch star indeed.

    Posted

  • ajamyajax by ajamyajax

    Yes, well done and virtual high fives all around! And it is good to see so much interest in PH recently that apparently the user volume has overloaded the cloud data request processing or something like that (just guessing there). Sorry about that new folks, but please be patient because it is always fixed at some point.

    I am sure this will be thoroughly sorted out by the experts at some point. Thanks for all the hard work and congrats again to all who contributed their time.

    Posted

  • gdomingu by gdomingu

    Super excited that planethunters.org is getting so much press for this!

    Posted

  • bashpr0mpt by bashpr0mpt in response to planetsam's comment.

    Can you please enlighten us as to what you pointed out there? To me this looks no different to dozens of others identical to it I have seen. What specifically is the media waffling on about? I'm hesitant to get too excited because the media syndicate News.com.au where I found it are pretty much a group of imbeciles who post absurd articles, Huffpost stuff, and stolen content from reddit / YouTube and are notoriously hack / inaccurate. But I want something to get excited about, that would be grand.

    What is in quarter 8? What about this light signature indicates a swarm of dyson sphere-esque rings orbiting a star filled with T-1000 droids ready to galactically stomp our planet, or whatever the journalists were driveling on about? 😛

    Posted

  • bashpr0mpt by bashpr0mpt in response to Yesh's comment.

    Citizen scientists and distributed computing is the way of the future. I've long been an evangelist for this cause and it's so rewarding finally seeing it in the news and getting more volunteers. Whilst I wish I could contribute more time categorizing things I do have an extensive following online and have managed to nag tens of thousands of followers to spend a little time, and many still help out to this day. So don't think you're limited by the time you can throw down yourself - think about all your friends and family. Talk to them about it. Reach out to your social network followers and spread the word. Even if you spent every hour of every day of the rest of your life categorizing it wouldn't be near as much as the man hours you could probably obtain if you just regularly brought it up online and around groups of people you think might be interested! 😄

    This project has some of the brightest minds I have EVER encountered, it's quite an achievement in and of itself and given that it doesn't placate any personal political agenda like Wikipedia I feel that such distributed projects do more for us as a species than Wikipedia ever could.

    Posted

  • davidbundy77 by davidbundy77

    I certainly recommend that people actually read the paper ( http://arxiv.org/abs/1509.03622 ) to get a more balanced view of what all the fuss is about. It is very well written and examines a large number of hypotheses in detail without jumping to wild conclusions. There are some technical details, but there are many sections which are easy to read even for people with no special scientific knowledge. Alternatively there is good synopsis here

    http://talk.planethunters.org/#/boards/BPH0000007/discussions/DPH0000xsy

    Posted

  • njoy1492 by njoy1492

    I agree davidbundy77. The arxiv article is a very interesting read and it's not difficult to follow.

    Posted

  • planetsam by planetsam in response to bashpr0mpt's comment.

    As Davidbundy77 said if you read the paper you'll see it's all explained in there. No, this is very different to anything else we have seen so far.

    And to reiterate, nowhere in the paper is any discussion of Dyson spheres, Death Stars or the like. It is simply a unique star for which no scenario presented so far can really explain its features satisfactorily. It is one big mystery, and finding mysteries that would otherwise have been missed was one of the whole points of this project.

    Other scientists have suggested it should be investigated whether it could be explained by Dyson-like megastructures, but no one here is claiming such a thing. Good luck to them if they can find evidence, but I think everyone expects there to be a natural explanation.

    Posted

  • Dolorous_Edd by Dolorous_Edd

    I felt like this thread was missing something ...

    enter image description here

    Admit it, somewhere deep down you knew it was coming ...

    Posted

  • ACS_LPSP by ACS_LPSP

    Good evening! I have long thought about the nature of occurrence of a fairly unusual light curve .and guess his hypothesis as an explanation of such anomalies? Maybe it's just a variable R Corona Borealis. Here's an example of such light curves of stars.

    https://en.wikipedia.org/wiki/R_Coronae_Borealis_variable

    http://www.astroalert.su/2008/07/13/fg-sagittae/

    Posted

  • davidbundy77 by davidbundy77 in response to ACS LPSP's comment.

    Boyajian et al. consider this possibility on page 9 of their paper (see link above)

    "The R Coronae Borealis (RCB) type variables are highly
    evolved F–G supergiants (e.g., Clayton 1996). Their light curves
    show pulsations (on the order of months) and irregular deep dips
    (lasting weeks to months). Their “dipping” variability is associated
    with formation of clouds that obscure the photosphere, and is often
    observed as a sharp decrease in flux followed by a more gradual,
    and sometimes staggered, recovery. In the case of KIC 8462852 the
    time scales of the dips are different than those of a RCB variable.
    Likewise, the ingress at D800 has a gradual decrease in flux, which
    is inverse to what is expected in a RCB, and the dip shapes at D1500
    are also non-characteristic of a RCB. Lastly, the spectroscopic
    log g and v sin i are far from those of a supergiant. These items together
    strongly rule out the possibility of KIC 8462852 being a RCB vari-
    able."

    Posted

  • frustaci by frustaci

    Regarding KIC 8462852, why didn’t the paper explore further the possibility of this being a binary system of similar spectral type stars, with a common center of mass in eccentric orbits with a period longer than Kepler’s observation window? Wouldn’t this be the most sensible approach?
    The light curve of such a system would be two close by big dips from the eclipsing binaries, with varying intensities according to each star temperature.

    In Doppler Spectroscopy, you could expect single line, instead of double spectral lines, with a shifting period lasting longer than the observation window, wouldn’t then take years of measurement to properly measure the radial velocity?

    Thanks

    Posted

  • amr2014 by amr2014

    Where i can find KIC 8462852 Chart Link?

    Posted

  • davidbundy77 by davidbundy77 in response to amr2014's comment.

    See post by planetsam on page 1 with links to the old PH Talk and LC

    Posted

  • bubuntu59 by bubuntu59

    its a shame, its close binary, aliens should also go to companion star to build,

    total foolishness

    Posted

  • symaski62 by symaski62

    hello i am french 😃

    comfirme ! 1 planet new !

    KIC 8462852

    792.5 days #transit (0.6 day) the sun hides the planet

    1540 days #transit (0.6 day) #Saturn

    747.5 days + 747.5 days = 1495 days orbit planet new

    merci je suis française désole

    Posted

  • fr667 by fr667 in response to ianhenderson's comment.

    I read your blog post, its such a comprehensive explanation and your opinion probably correct, based on usual symmetric curve. however, why don't you discuss on T 1500 - 1520?
    What is it

    Posted

  • johnfairweather by johnfairweather

    Further details here - http://talk.planethunters.org/#/boards/BPH0000007/discussions/DPH0000xsy

    Posted

  • ajamyajax by ajamyajax

    "WTF? Help astronomers solve this massive mystery: Where’s the flux?"

    https://www.yahoo.com/news/chance-help-astronomers-solve-one-184938728.html

    Posted

  • chavezwebdesigngmail.com by chavezwebdesigngmail.com

    How many transits have been documented? I just saw a TED talk that showed transits for 2009, 2011, and 2013. I would imagine there should be one for 2015 since it seems to transit every 2 years. However, I did not see any graphs for 2015 so I am curious in knowing what is the latest transit.

    Posted

  • davidbundy77 by davidbundy77

    There are detailed graphs of the light curve from 2009 to 2013 in the original paper http://arxiv.org/pdf/1509.03622v2.pdf

    Unfortunately there is no data from Kepler for 2015, so we don't know whether the dips in brightness are periodic. If they are periodic the next chance is in May 2017. The dips are certainly too deep and irregular to be the transits of a planet. Hence the intensive speculation about what could possibly cause such dips.

    Posted

  • Melina_t by Melina_t

    KIC 8462852 is dipping right now:
    https://twitter.com/Astro_Wright/status/865528682114203648

    ![Example Alt Text](http://i.imgur.com/tcWwLPE.png =300x)

    2% dip in r' band: https://twitter.com/tsboyajian/status/865542587087601665

    Example Alt Text

    Posted

  • ajamyajax by ajamyajax in response to Melina_t's comment.

    Yes, very exciting. Crowdsourcing backers were also emailed a prelim chart showing this drop in normalized flux. More to follow soon for all, I am sure. 😃

    Update: from Melinda_t's post from twitter, see Tabby's first chart here:

    https://twitter.com/tsboyajian/status/865542587087601665

    Posted

  • ajamyajax by ajamyajax

    p.s. before this news I put some new quick look TPF animations on my website if anyone is interested:

    http://www.ajamyajax.com/

    (And maybe I am wrong about the interstellar cloud idea now or maybe not, we'll see. But my guess not important in any case.. This new dip -- and possibly more soon, might help solve the mystery if they turn out to be periodic in any way).

    Posted

  • ajamyajax by ajamyajax

    "Something Weird Is Happening to the 'Alien Megastructure' Star"

    "Tabby's star, famous for its inexplicable dips in brightness, is going through one of those dips right now."

    http://www.popularmechanics.com/space/deep-space/a26575/something-weird-is-happening-to-the-alien-megastructure-star/

    Posted

  • Melina_t by Melina_t

    AAVSO alert: https://www.aavso.org/aavso-alert-notice-532

    Astronomer's Telegram: http://www.astronomerstelegram.org/?read=10405

    reddit (in)complete list of observatories: https://www.reddit.com/r/KIC8462852/comments/6c6rwc/list_of_observatories_which_are_observing_or_may/?st=j2x00ctl&sh=9b033b8a

    Paper predicted ~750 day period and predicted April 2015 and May 2017 in section "5.2 Aftermath of giant impact in planetary system" https://arxiv.org/abs/1509.03622

    Posted

  • symaski62 by symaski62

    OMG ! #transit

    time (BJD),
    1 #transit 2455625,
    2 #transit 2456351,
    3 #transit 2456401,
    4 #transit 2457891 new !

    Posted

  • ajamyajax by ajamyajax in response to Melina_t's comment.

    Great links on the planned observations, thank you for posting.

    Posted

  • ajamyajax by ajamyajax

    Ok, so the earlier ~2% drop in flux is the 1540.4 bkjd event near two larger dimming events as shown. So the potential of a larger dip soon is tantalizing with that one maybe at +1519.5 to get to 3059.9 bkjd. Wouldn't it be interesting if they do repeat fairly soon, but in a different sequence or duration?..

    T1

    F1

    Posted

  • symaski62 by symaski62

    😃

    http://arxiv.org/abs/1705.08427

    enter image description here

    Posted

  • ajamyajax by ajamyajax

    'Alien Megastructure' Star Subject of 'Space’s Deepest Secrets' | Video Clip

    By Steve Spaleta | May 24, 2017 02:26pm ET

    The Science Channel show takes a look “Tabby Star.”

    http://www.space.com/36986-alien-megastructure-star-subject-of-spaces-deepest-secrets-video-clip.html

    (And like the early new transit event, just a preview here as well..)

    Posted

  • ajamyajax by ajamyajax

    This might also interest:

    "Star's Comet-Like Icy Debris Ring Captured in New Video, Images"

    By Samantha Mathewson, Space.com Contributor

    http://www.space.com/36972-icy-debris-ring-fomalhaut-new-alma-video-images.html

    Posted

  • ajamyajax by ajamyajax

    Time for a larger What The Flux dip?.. Maybe. Hope so anyway. Seems to be about 28 days (+/-) between the current dips and shown is the approx interval in the old K1 data from the first possibly similar event.. And yes this is all just speculation.

    Update: so far, no larger dips.

    T2

    Posted

  • ajamyajax by ajamyajax

    "Alien megastructure" star may be a sign of a dying world"

    By Nola Taylor Redd

    http://astronomy.com/news/2017/07/disintegrating-worlds

    Posted

  • ajamyajax by ajamyajax

    More WTF star dips, see Tabby's recent posts here:

    http://www.wherestheflux.com/blog


    And just more studies in the news:

    "Alien megastructure’ star may host Saturn-like exoplanet"

    By Jesse Emspak

    https://www.newscientist.com/article/2144869-alien-megastructure-star-may-host-saturn-like-exoplanet/


    http://aasnova.org/2017/07/07/another-possibility-for-boyajians-star/


    "Is the "alien megastructure" around Tabby's Star actually a ringed gas giant?"

    by Matt Williams

    https://phys.org/news/2017-08-alien-megastructure-tabby-star-gas.html

    Posted

  • symaski62 by symaski62

    Dip update 66/n

    167 -> 182 day = 15 days = 360 hrs

    https://en.wikipedia.org/wiki/KIC_8462852

    sun radius : 1.58


    http://www.kianjin.com/pcalc.html

    Transit depth (∆Flux) : 0.01

    Apparent magnitude of star: 11.19

    Temperature : 6750K

    Radius of star (in solar radii): 1.58

    Mass of star (in solar masses): 1.43

    Transit duration : 360

    Period of planet: 2810186.133 days = 7693.87 yaers

    Radius of planet : 1.538 RJ (109878 km or 17.247 RE)

    Orbital distance of planet : 439.279 AU (65715.260 million km)

    Distance to star: 1280.76 Ly

    hummmm ?!? calc...

    Posted

  • symaski62 by symaski62

    http://www.wherestheflux.com/single-post/2017/09/09/Dip-update-78n

    update 78n

    Posted

  • symaski62 by symaski62

    Detection of a repeated transit signature in the light curve of the enigma star KIC 8462852: a 928-day period ?

    what ?

    Posted

  • symaski62 by symaski62

    A 1574-day periodicity of transits orbiting KIC 8462852

    page 5 #transit

    D792 16.0% 17-Oct-19 (17 octobre 2019)

    D1519 21.0% 13-Oct-21 (13 octobre 2021)

    Posted

  • symaski62 by symaski62

    https://arxiv.org/abs/1710.05929

    Modelling the KIC8462852 light curves: compatibility of the dips and secular dimming with an exocomet interpretation

    Posted

  • Dicktaylor by Dicktaylor

    wow can you people help with my minecraft mods installation it is rlly hadr.

    Posted

  • ajamyajax by ajamyajax

    "Scientist sees evidence of planet formation in narrow rings of other solar systems"

    https://phys.org/news/2017-10-scientist-evidence-planet-formation-narrow.html

    Posted

  • JenniferConnors by JenniferConnors

    Resembling The Beginnings of Planetary Creation or Dust Ring.

    A large local quantity of light makes this image possible. KIC 4477148 is a star that may have planets.
    It's neighbor shows a good view of a large gas and dust ring, is it possibly in the stages of planetary evolution?
    enter image description here

    (Not KIC8462852)

    The neighbor is not a Kepler Target.

    19 39 51.15 +39 34 22.34

    KID 4477148 may have a super earth sized planet. Good Transits.
    .79 R_Sol, 3 x R_Earth, Period = 173.644 Days, 275 K.

    9 39 48.44 +39 35 15.0

    Posted

  • symaski62 by symaski62

    https://arxiv.org/abs/1711.10612

    enter image description here

    Posted

  • symaski62 by symaski62

    https://arxiv.org/abs/1803.04543

    Possible Bright Starspots on TRAPPIST-1

    The M8V star TRAPPIST-1 hosts seven roughly Earth-sized planets and is a promising target for exoplanet characterization. Kepler/K2 Campaign 12 observations of TRAPPIST-1 in the optical show an apparent rotational modulation with a 3.3 day period

    Posted