Geert Barentsen

@GeertHub

NASA Astronomer in Silicon Valley. Leads the wonderful team at . Belgian (like waffles).

Mountain View, CA
Vrijeme pridruživanja: svibanj 2009.

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  1. 22. sij

    Looks like someone won a battle to show an actual FITS file on NASA TV. ❤️

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  2. 13. sij

    Do you... Like ? 🪐🔭 Enjoy programming? 🐍🖥️ Want to work at a center? 👩🏽‍🚀🚀 If so, there is a *sweet* job opportunity available for you in Silicon Valley right now: Please spread the word!! 🙏

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  3. 13. sij

    Pro-tip: it is *really* easy to see planet Venus in the evening sky right now! Simply look west after sunset, wherever you are on planet Earth. You don't need a telescope because Venus is the third brightest object…

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  4. 5. sij

    Knock knock! Who's there? @ Yosemite National Park

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  5. 3. sij

    This is a huge 15×30 km section of Australia, captured in infrared light by the Sentinel-2 satellite on New Years Eve. 😟 You can browse these images yourself via

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  6. proslijedio/la je Tweet
    1. sij

    Happy New year Twitter! Is your new years resolution to get a position working at a NASA center on Kepler data? It is?! Well click right here and check out this new position! We're reviewing applications starting Jan 24, taking applications until Feb 15!

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  7. proslijedio/la je Tweet

    Extensive bushfire smoke from and southeastern has travelled over the and is now affecting the south island of . Latest at

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  8. proslijedio/la je Tweet
    26. pro 2019.

    I found an old photo I had taken of Orion on my phone camera () on Oct 10th of this year. I also took a photo a couple days ago (Dec 24th). After carefully aligning and matching the two images, the brightness change of (red star near top) is pretty clear!!

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    ⭐️⭐️⭐️⭐️⭐️⭐️⭐️⭐️ Hello astronomy twitter. I am currently advertising a Research Scientist position to work with me on big data Kepler projects. TL;DR please share this opportunity with your early career researcher friends!

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  10. 11. pro 2019.

    🛰️✨🤹‍♂️ TESS Trick #8: Want to export a light curve to a CSV file? ➡️ _csv(filename) See example 👇

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  11. 6. pro 2019.

    WANTED: This fuzzy-tailed THIEF known as Mr Nibbles keeps stealing avocados from our tree. The furocious millennial!! 🥑🐿️ @ Mountain View, California

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  12. 6. pro 2019.

    🛰️✨🤹‍♂️ TESS Trick #7: Want to understand those cryptic quality flags encoded in TESS data products? ➡️ TessQualityFlags.decode(quality_code) See example 👇

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  13. 3. pro 2019.

    The money plot in the new Stefansson+ paper is Figure 13, which shows a Transmission Spectroscopy Metric for all known small M-dwarf planets. The newly-confirmed planet G9-40b ranks among the very best by this metric! (3/3)

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  14. 3. pro 2019.

    In terms of the most nearby planet discoveries made by Kepler so far, G9-40b enters the ranking only just below first place: 1️⃣ K2-129 b (91 ly) 2️⃣ G9-40 b (91 ly) 3️⃣ GJ 9827 bcd (97 ly) ☝️ Based on the table. (2/3)

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  15. 3. pro 2019.

    ⚠️Nearby planet discovery⚠️ Stefansson+ confirm G9-40b, a 2x Earth-sized planet around an M-dwarf star just 91 light years away. ➡️Discovered in Campaign 16. ➡️Second-most nearby Kepler discovery so far!! ➡️Excellent JWST target. Paper: (1/3)

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  16. 25. stu 2019.

    🛰️✨🤹‍♂️ TESS Trick #6: Need to remove outliers from a light curve? Use this: lc.remove_outliers() Optional arguments include: ➡️ sigma=3 ➡️ sigma_lower=3 ➡️ sigma_upper=3 ➡️ return_mask=True See example 👇

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  17. 22. stu 2019.

    🛰️✨🤹‍♂️ TESS Trick #5: Want to create custom light curves using using all pixels brighter than N*sigma above the background? Try this: ➡️ mask = tpf.create_threshold_mask(threshold=N) ➡️ _lightcurve(aperture_mask=mask) See example 👇

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  18. 21. stu 2019.

    🛰️✨🤹‍♂️ TESS Trick #4: Want to check if your favorite object has been observed in TESS FFI images? Try this: ➡️ search_tesscut("Whirlpool Galaxy") Append `.download(cutout_size)` to obtain a cut-out from the data archive at MAST. See example 👇

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  19. 20. stu 2019.

    If you're in the Bay Area, in San Jose will be good tonight! Spoiler: is going to use a *live demo* to explain why and how stars vibrate!!

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  20. 20. stu 2019.

    🛰️✨🤹‍♂️ TESS Trick #3: Want to discover a planet candidate using the BLS algorithm? Try this: bls = _periodogram("bls") Useful members: ➡️ bls.plot() ➡️ bls.period_at_max_power ➡️ bls.transit_time_at_max_power See example 👇

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