Galaxy Zoo Talk

Stargazing Live 2015 / solar eclipse in North Atlantic / Snaphot Supernova

  • Budgieye by Budgieye moderator

    BBC Stargazing Live 2015 : dates of transmission from The Sky at Night magazine, which has eclipse glasses with each issue.

    March 18 8pm-10pm BBC2 - moons, Moon landings, a chance for citizen scientists to discover a supernova

    March 19 8-11 pm ? BBC2 planetary orb its and alignments, solar eclipse effects on Earth

    March 20- 9 am BBC 1 (in the morning) total eclipse from airplane over the Faroes

    March 20 9-11pm BBC 2 results of eclipse, news on missions to the Sun, result of supernova

    predictions and map http://eclipse.gsfc.nasa.gov/SEplot/SEplot2001/SE2015Mar20T.GIF

    Never look at a partially eclipsed Sun: you will damage your eyesight. http://eclipse.gsfc.nasa.gov/SEhelp/safety.html

    Thanks to Alice, March 20th Partial Eclipse viewing details in London - https://www.ras.org.uk/education-and-careers/for-everyone/2588-solar-eclipse-viewing-event

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  • johnfairweather by johnfairweather

    Next week's Radio Times has the front cover devoted to the eclipse & also an article on it.

    This month's Popular Astronomy magazine has some eclipse glasses inside, along with a solar photo by Jules and a small non-eclipse article by myself.

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  • Budgieye by Budgieye moderator

    Program started, and now a busy Snaphot Supernova website, I can't get onto it.

    Posted

  • Budgieye by Budgieye moderator

    Ok, if I assume the Library picture was taken on an overcast night, when only one star was visible, then the Recent was taken on a clearer night when 3 stars were visible, then the program seems to detect three "supernova" . I would then say #poorimage
    https://stargazing2015.zooniverse.org/#/projects/zooniverse/Snapshot Supernova/subjects/77905

    elisabeth.. some of the picture sets seem to have the library and subtraction the wrong way around... odds of 2 sn in one shot are extremely unlikelhttps://stargazing2015.zooniverse.org/#/projects/zooniverse/Snapshot Supernova/subjects/21520

    https://stargazing2015.zooniverse.org/#/projects/zooniverse/Snapshot Supernova/subjects/4815 Library has small extended source with a white dot, Recent has a large "star" Not sure.

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  • Budgieye by Budgieye moderator

    possible SN that is already being spectral analyzed

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  • Budgieye by Budgieye moderator

    https://stargazing2015.zooniverse.org/#/projects/zooniverse/Snapshot Supernova has discovered four supernova,

    Type 1c supernova

    https://s3.amazonaws.com/demo.zooniverse.org/panoptes-front-end/results/FMTJ13254307-2932269.png

    Type 1a

    https://s3.amazonaws.com/demo.zooniverse.org/panoptes-front-end/results/FMTJ13545986-2820019.png

    Type Ia

    https://s3.amazonaws.com/demo.zooniverse.org/panoptes-front-end/results/FMTJ10310056-3658263.png

    Type II

    https://s3.amazonaws.com/demo.zooniverse.org/panoptes-front-end/results/FMTJ10310056-3658263.png

    http://www.astronomerstelegram.org/?read=7254

    http://www.astronomerstelegram.org/?read=7261

    https://s3.amazonaws.com/demo.zooniverse.org/panoptes-front-end/results/FMTJ13545986-2820019.png

    Type 1a supernova are "standard candles". They are always the same brightness, and can be used to measure how far away a supernova is. The redshift of the supernova light is used to measure the stretching of space by the expanding universe. So if you then run the expansion backwards, you can get a measurement for how long the universe has been expanding since the Big Bang. One of these supernova was measured to be 500 million light-years away and the beginning of our universe would be 14.03 billion years ago, which is several hundred millions more than the current value of 13.77.

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  • Budgieye by Budgieye moderator

    Brian Cox also showed the completed paper to the camera, which was the Stargazing Live 2014 citizen science project.

    The Red Radio Ring: a gravitationally lensed hyperluminous infrared radio galaxy at z=2.553 discovered through citizen science

    enter image description here

    http://talk.spacewarps.org/#/subjects/ASW0009io9

    J. E. Geach (Hertfordshire), A. More, A. Verma, P. J. Marshall, N. Jackson, P.-E. Belles, R. Beswick, E. Baeten, M. Chavez, C. Cornen, B. E. Cox, T. Erben, N. J. Erickson, S. Garrington, P. A. Harrison, K. Harrington, D. H. Hughes, R. J. Ivison, C. Jordan, Y.-T. Lin, A. Leauthaud, C. Lintott, S. Lynn, A. Kapadia, J.-P. Kneib, C. Macmillan, M. Makler, G. Miller, A. Montana, R. Mujica, T. Muxlow, G. Narayanan, D. O Briain, T. O'Brien, M. Oguri, E. Paget, M. Parrish, N. P. Ross, E. Rozo, E. Rusu, E. S. Rykoff, D. Sanchez-Arguelles, R. Simpson, C. Snyder, F. P. Schloerb, M. Tecza, L. Van Waerbeke, J. Wilcox, M. Viero, G. W. Wilson, M. S. Yun, M. Zeballos

    (Submitted on 19 Mar 2015)

    We report the discovery of a gravitationally lensed hyperluminous infrared galaxy (L_IR~10^13 L_sun) with strong radio emission (L_1.4GHz~10^25 W/Hz) at z=2.553. The source was identified in the citizen science project SpaceWarps through the visual inspection of tens of thousands of iJKs colour composite images of Luminous Red Galaxies (LRGs), groups and clusters of galaxies and quasars. Appearing as a partial Einstein ring (r_e~3") around an LRG at z=0.2, the galaxy is extremely bright in the sub-millimetre for a cosmological source, with the thermal dust emission approaching 1 Jy at peak. The redshift of the lensed galaxy is determined through the detection of the CO(3-2) molecular emission line with the Large Millimetre Telescope's Redshift Search Receiver and through [OIII] and H-alpha line detections in the near-infrared from Subaru/IRCS. We have resolved the radio emission with high resolution (300-400 mas) eMERLIN L-band and JVLA C-band imaging. These observations are used in combination with the near-infrared imaging to construct a lens model, which indicates a lensing magnification of ~10x. The source reconstruction appears to support a radio morphology comprised of a compact (less than 250 pc) core and more extended component, perhaps indicative of an active nucleus and jet or lobe.

    Comments: 9 pages, 7 figures, submitted to MNRAS
    Subjects: Astrophysics of Galaxies (astro-ph.GA); Cosmology and Nongalactic Astrophysics (astro-ph.CO)
    Cite as: arXiv:1503.05824 [astro-ph.GA]
    (or arXiv:1503.05824v1 [astro-ph.GA] for this versi

    http://arxiv.org/abs/1503.05824

    http://arxiv.org/pdf/1503.05824v1.pdf pdf version

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  • JeanTate by JeanTate in response to Budgieye's comment.

    Richard Scalzo, the co-PI, reports a fifth SN, "of still unconfirmed type" (source). He also reports that the Type Ic is a Ib/c.

    In terms of the aims, he says "So our yield is about what we expected based on the amount of data we had, maybe slightly better." In other words, if Snapshot Supernova had not found any supernovae, that would have been either a project failure, or perhaps a several sigma 'cosmic variance' 😛

    I wonder how many astrophysically interesting transients were also discovered (other than SNe)? Previously unknown asteroids, or variable stars, or rare types of AGN ...

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  • Budgieye by Budgieye moderator

    Other topics

    Much info about the solar eclipse on March 20, 2015 , total in the North Atlantic, partial in Britian.

    Moon features seen through city light pollution

    Tidal bore on River Severn will be particularly high during eclipse, due to alignment of Sun and Moon, good for river surfing.

    Guest for 2 nights was Buzz Aldrin.

    The Moon is receding from the Earth by 3.7 cm a year. How do we know? Neil Armstrong and Buzz Aldrin left a radar reflecting mirror on the Moon in 1969. In 600 million years, the Moon will be too far away to cause a total eclipse, only annual ones.

    Stonehenge as an eclipse predictor.

    NASA Mr. Eclipse, Fred Espanek has been to 27 solar eclipses.

    Locating lost Moon rock exhibits.

    Robonaut, a robot on the International Space Station, is being programmed to repair satellites.

    Brian Cox tried out a Moon lander simulator with former astronauts Rusty Schweickart and Karol Bobko.

    Stargazing:

    June Rosetta spacecraft should watch comet 67P/Churyumov-Gerasimenko come to life.

    June 30 Jupiter and Venus will be close in the sky.

    July 14 New Horizons spacecraft reaches Pluto

    August 13 Perseid meteors

    Sept 27/28 Lunar eclipse early in morning

    Nov 7 Jupiter, Venus, Mars and crescent Moon close together.

    Nov 17 Leonids meteor shower

    Nov? Comet Cataline

    Dec? UK astronaut Tim Peake goes up.

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