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WikiCards · Card list · Science cards · GRB 090423
Uncommon card · Science
GRB 090423, an Uncommon card
GRB 090423 was a gamma-ray burst detected by the Swift Gamma-Ray Burst Mission on April 23, 2009, at 07:55:19 UTC whose afterglow was detected in the infrared and enabled astronomers to determine that its redshift is z = 8.2, making it one of the most distant objects detected at that time with a spectroscopic redshift.
- Rarity
- Uncommon
- Domain
- Science
- ATK
- 64
- DEF
- 40
- Power
- 104
- Wikipedia reads a year
- 27,000
Ranked #2,700 of the 3,000 cards of the base set by power (ATK + DEF).
GRB 090423 quiz: 3 questions
Three questions on the GRB 090423 card, the way WikiCards duels ask them. Pick an answer, the facts are just below.
Find the missing word
Measurements at these ______, which include X-ray, ultraviolet, optical, infrared, and radio, enable follow-up study of the event.
Answer
wavelengths. Measurements at these wavelengths, which include X-ray, ultraviolet, optical, infrared, and radio, enable follow-up study of the event. From the GRB 090423 article on Wikipedia.
Which of these Wikipedia articles is read the most in a year?
Answer
Azimuthal equidistant projection. Azimuthal equidistant projection 92,000 · Angular resolution 58,000 · Clock face 39,000 · GRB 090423 27,000 Wikipedia reads over a year.
In a duel, each round asks a question like these about the opposing card, with 15 seconds to answer.
The facts on the card
The card carries these facts from its Wikipedia article.
- A gamma-ray burst is an extremely luminous event flash of gamma rays that occurs as the result of an explosion, and is thought to be associated with the formation of a black hole.
- The burst itself typically only lasts for a few seconds, but gamma-ray bursts frequently produce an "afterglow" at longer wavelengths that can be observed for many hours or even days after the burst.
- Measurements at these wavelengths, which include X-ray, ultraviolet, optical, infrared, and radio, enable follow-up study of the event.
Why it is Uncommon
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The GRB 090423 article was read about 27,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 64 and blocks with 40: each hit it takes is cut by 16 %.
How to get GRB 090423
Open packs. Each pack holds five cards drawn from real Wikipedia articles, the rarest last, and the fifth card is always Rare or better. The odds are shown in the game. A free pack arrives every hour and two can wait, and the Coins you win in duels buy more packs.
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Credits
Text : Wikipedia, GRB 090423 (revision), CC BY-SA 4.0. Photo : International Gemini Observatory/ NSF /AURA, D. Fox and A. Cucchiara (Penn State Univ.) an, CC BY 4.0, Wikimedia Commons.