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Official NASA: The Glow Of A Classic Supernova Will Soon Emerge!
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[quote:Gatica:MV8yMjI3ODcwXzM3Nzg0ODA2XzI4MUIyODI4] [quote:whiteangel:MV8yMjI3ODcwXzM3NzgwMTMzX0YzRUYyM0JD] [quote:Anonymous Coward 21666560:MV8yMjI3ODcwXzM3Nzc4MTM0XzJBNkYwOTIx] [quote:whiteangel:MV8yMjI3ODcwXzM3Nzc3MzE5XzNEMEZEMzI2] [quote:Anonymous Coward 39514626:MV8yMjI3ODcwXzM3Nzc3MTQ4XzM0RkJDMzlC] [quote:Niemand:MV8yMjI3ODcwXzM3NzczODQ5X0MzNEY1RkQ1] What does [color=red]"we obtain a magnitude expected for the peak of the SN of I = 22 - 23"[/color] mean? [/quote] [quote:Niemand:MV8yMjI3ODcwXzM3NzczOTUzXzNCNDNFREJE] SN I means SuperNova Type I and the absolute magnitude of a SN (SuperNova) is 19.3 or 5 billion times brighter than the Sun. [/quote] The absolute magnitude for a Supernova is 19.3 and this had 22-23? How is that possible? [/quote] Not sure how they are calculating the brightness but here is an example on brightness: The full Moon has a mean apparent magnitude of –12.74[5] and the Sun has an apparent magnitude of –26.74 To be see by the typical natural eye, it has to be +6.0 or less. http://en.wikipedia.org/wiki/Apparent_magnitude [/quote] OK, so the lower the number of magnitude, the brighter it is... if human eye can only see +6.0 or better (meaning a lower number,) then we WON'T be seeing this as it's a +22 - +23 in magnitude? [/quote] That is what it looks like to me. That is what isn't making sense with the numbers and yet we are suppose to be able to see it. +22/23 isn't bright at all. [/quote] Pardon me if someone has already answered this, but I thought it was -22/23, not +22/23. Big difference! [/quote]
Original Message
The NASA Astronomy Picture of the Day 05/08/2013 shows the Supernova and says: "as there is a possibility that the glow of a classic supernova
will soon emerge
."
Namely between the 10th and the 12th of May 2013 ...
[
link to gcn.gsfc.nasa.gov
]
Explanation: A tremendous explosion has occurred in the nearby universe and major telescopes across Earth and space are investigating. Dubbed GRB 130427A, the gamma-ray burst was first seen by the Earth-orbiting Swift satellite in high energy X-rays and quickly reported down to Earth. Within three minutes, the half-meter ISON telescope in New Mexico found the blast in visible light, noted its extreme brightness, and relayed more exact coordinates.
[
link to apod.nasa.gov
]
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