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Puppis A

Supernova remnant

Puppis A

The Chandra three-color image (inset) is a region of the supernova remnant Puppis A (wide-angle view from ROSAT in blue) which reveals a cloud being torn apart by a shock wave produced in a supernova explosion. ROSAT image is 88 arcmin across; Chandra image 8 arcmin across. RA08h23m 08.16s Dec -42° 41′ 41.40″ in Puppis. Observation date: September 4, 2005. Color code: Energy (Red 0.4-0.7 keV; Green 0.7-1.2 keV; Blue 1.2-10 keV). Instrument: ACIS. Credit: Chandra: NASA/CXC/GSFC/U.Hwang et al.; ROSAT: NASA/GSFC/S.Snowden et al.
Event type	Supernova remnant
S
Date	1971
Constellation	Puppis
Right ascension	08h24m07s
Declination	-42° 59' 48
Epoch	J2000
Galactic coordinates	l = 260.2°, b = -3.7°
Distance	7,000 ly
Host	Milky Way
Progenitor	Unknown
Progenitor type	Unknown
Colour (B-V)	Unknown
Notable features	central source: RX J0822-4300. Apparent size: 1°
Other designations	SNR G260.4-03.4, MRC 0821-428, 3FHL J0822.1-4253e, 2U 0821-42, 3A 0821-427, 3U 0821-42, 4U 0821-42, AJG 6, INTREF 352, MSH 08-4-04, PKS 0822-42, PKS 0822-428, PKS J0824-4259, 2FGL J0823.0-4246, 3FGL J0822.6-4250e, 2FHL J0822.6-4250e
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Puppis A (Pup A) is a supernova remnant (SNR) about 100 light-years in diameter and roughly 6500–7000 light-years distant.^[1] Its apparent angular diameter is about 1 degree.^[2] The light of the supernova explosion reached Earth approximately 3700 years ago. Although it overlaps the Vela Supernova Remnant, it is four times more distant.

A hypervelocity neutron star known as the Cosmic Cannonball has been found in this SNR.

Puppis X-1[edit]

Puppis X-1 (Puppis A) was discovered by a Skylark flight in October 1971, viewed for 1 min with an accuracy ≥ 2 arcsec,^[3] probably at 1M 0821-426, with Puppis A (RA08^h23^m 08.16^s Dec -42° 41′ 41.40″) as the likely visual counterpart.

Puppis A is one of the brightest X-ray sources in the X-ray sky. Its X-ray designation is 2U 0821-42.

Gallery[edit]

• 
  Puppis A: X-ray [blue:0.3-8 keV] + IR [red-green:24-70 microns] (21 August 2014).
• 
  Puppis A: X-ray [blue:high]/[green:medium]/[red:low] (10 September 2014).

References[edit]

• "Puppis A: Chandra Reveals Cloud Disrupted By Supernova Shock", Chandra: NASA/CXC/GSFC/U.Hwang et al.; ROSAT: NASA/GSFC/S.Snowden et al., [1]
• Simbad

See also[edit]

• List of supernova remnants

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