Cosmic Shell-Seekers Find a Beauty

Chandra_275_1024

chandra_275 April 19th, 2005

Credit: NASA/CXC/U.Manitoba/H.Matheson & S.Safi-Harb

This image, made by combining 150 hours of archived Chandra data, shows the remnant of a supernova explosion. The central bright cloud of high-energy electrons is surrounded by a distinctive shell of hot gas. The shell is due to a shock wave generated as the material ejected by the supernova plows into interstellar matter. Although many supernovas leave behind bright shells, others do not. This supernova remnant was long considered to be one without a shell until it was revealed by Chandra.

Image Source: http://chandra.harvard.edu/photo/2005/g21/

Curator: Chandra X-ray Observatory, Cambridge, MA, USA

Image Use Policy: http://chandra.harvard.edu/photo/image_use.html

Image Details

Image Type
Observation
Object Name
G21.5-0.9
Subject - Milky Way
Nebula > Type > Supernova Remnant

Distance

Universescale1
20,000 light years
Chandra_275_128
 

Position Details

Position (ICRS)
RA = 18h 33m 32.8s
DEC = -10° 34’ 23.1”
Orientation
North is 1.6° CCW
Field of View
6.3 x 6.3 arcminutes
Constellation
Scutum

Color Mapping

  Telescope Spectral Band Wavelength
Arrow_left_red Chandra (ACIS) X-ray (Soft X-ray) 1.46 nm
Arrow_left_green Chandra (ACIS) X-ray (Medium X-ray) 550.0 pm
Arrow_left_blue Chandra (ACIS) X-ray (Hard X-ray) 190.0 pm
Spectrum_xray1
Arrow_top_red
Arrow_top_green
Arrow_top_blue
Chandra_275_1280
×
ID
275
Subject Category
B.4.1.4  
Subject Name
G21.5-0.9
Credits
NASA/CXC/U.Manitoba/H.Matheson & S.Safi-Harb
Release Date
2005-04-19
Lightyears
20,000
Redshift
20,000
Reference Url
http://chandra.harvard.edu/photo/2005/g21/
Type
Observation
Image Quality
Good
Distance Notes
Facility
Chandra, Chandra, Chandra
Instrument
ACIS, ACIS, ACIS
Color Assignment
Red, Green, Blue
Band
X-ray, X-ray, X-ray
Bandpass
Soft X-ray, Medium X-ray, Hard X-ray
Central Wavelength
1.46, 0.55, 0.19
Start Time
Integration Time
Dataset ID
Notes
Coordinate Frame
ICRS
Equinox
2000.0
Reference Value
278.38681000000, -10.57307720000
Reference Dimension
2400.00, 2400.00
Reference Pixel
1284.05017846434, 1103.54638881899
Scale
-0.00004377912, 0.00004377912
Rotation
1.55019675481
Coordinate System Projection:
TAN
Quality
Full
FITS Header
Notes
World Coordinate System resolved using PinpointWCS 0.9.0 revision 213+ by the Chandra X-ray Center
Creator (Curator)
Chandra X-ray Observatory
URL
http://chandra.harvard.edu
Name
Chandra X-ray Observatory Center
Email
cxcpub@cfa.harvard.edu
Telephone
617.496.7941
Address
60 Garden St.
City
Cambridge
State/Province
MA
Postal Code
02138
Country
USA
Rights
http://chandra.harvard.edu/photo/image_use.html
Publisher
Chandra X-ray Observatory Center
Publisher ID
chandra
Resource ID
g21_xray.tif
Metadata Date
2012-07-30T15:40:26-04:00
Metadata Version
1.2
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Detailed color mapping information coming soon...

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Universescalefull
20,000 light years