Astronomy Picture of the Day

GRB 060218: A Mysterious Transient

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#84927 by @ 28.02.2006 00:00 - nach oben -
GRB 060218: A Mysterious Transient

What is it?

Something is happening in a small portion of the sky toward the
constellation of

Telescopes around the globe are tracking an unusual
transient there as it changes day by day.

No one is sure what it will do next.

The entire
space mystery began
on February 18 when the Earth-orbiting robot
Swift satellite
noticed an unusual transient began to glow dimly in
gamma rays.

Dubbed GRB 060218, the object is a type of
gamma ray burst (GRB) but
the way its brightness changes is very unusual.

Since detection,
GRB 060218 has been found to emit light across the
electromagnetic spectrum, including radio waves and visible light.

Pictured above, the Sloan Digital Sky Survey (SDSS)
image of the field of GRB 060218 well prior to its Swift trigger is shown on the left, while the same field, taken by the orbiting Swift satellites' ultraviolet telescope after the Swift trigger, is shown on the right.

The oddball GRB
is visible in the center of the right image.

Subsequent observations found a
redshift for the transient of z=0.033, showing it to be only about 440 million
light years away,
relatively nearby compared to typical GRBs.

Whether GRB 060218 represents a new type of
gamma ray burst,
a new type of
or an unusual
between the GRBs and supernovas has become an instant topic of research.

Credit & Copyright
#84946 by @ 28.02.2006 13:56 - nach oben -
Kann mir jemand erklären, was an den Bildern speziell ist? Ich seh mal keinen Unterschied, obwohl das Teil sich ja täglich ändern soll. Haben sie einfach zwo gleichzeitige Bilder mit verschiedenem Spektrum genommen?