First Light

Chandra_285_1024

chandra_285 August 26th, 1999

Credit: NASA/CXC/SAO

This X-ray image of the Cassiopeia A (Cas A) supernova remnant is the official first light image of the Chandra X-ray Observatory. The 5,000 second image was made with the Advanced CCD Imaging Spectrometer (ACIS). Two shock waves are visible: a fast outer shock and a slower inner shock. The inner shock wave is believed to be due to the collision of the ejecta from the supernova explosion with a circumstellar shell of material, heating it to a temperature of ten million degrees Celsius. The outer shock wave is analogous to an awesome sonic boom resulting from this collision. The bright object near the center may be the long sought neutron star or black hole that remained after the explosion that produced Cas A.

Provider: Chandra X-ray Observatory

Image Source: http://chandra.harvard.edu/photo/1999/0237/

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
Cassiopeia A
Subject - Milky Way
Star > Evolutionary Stage > Supernova
Nebula > Type > Supernova Remnant

Distance

Universescale1
10,000 light years
Chandra_285_128
 

Position Details

Position (ICRS)
RA = 23h 23m 27.4s
DEC = 58° 48’ 50.6”
Orientation
North is up
Field of View
7.2 x 7.2 arcminutes
Constellation
Cassiopeia

Color Mapping

  Telescope Spectral Band Wavelength
Pseudocolor Chandra (ACIS) X-ray (X-ray) 826.7 pm
DatasetID is the Chandra Observation ID
Spectrum_xray1
Pseudocolor
Chandra_285_1280
×
ID
285
Subject Category
B.3.1.8   B.4.1.4  
Subject Name
Cassiopeia A
Credits
NASA/CXC/SAO
Release Date
1999-08-26
Lightyears
10,000
Redshift
10,000
Reference Url
http://chandra.harvard.edu/photo/1999/0237/
Type
Observation
Image Quality
Good
Distance Notes
Facility
Chandra
Instrument
ACIS
Color Assignment
Pseudocolor
Band
X-ray
Bandpass
X-ray
Central Wavelength
0.8267
Start Time
1999-08-20T00:07:44
Integration Time
3000
Dataset ID
214
Notes
D
Coordinate Frame
ICRS
Equinox
J2000
Reference Value
350.8642966, 58.8140448
Reference Dimension
504.0, 504.0
Reference Pixel
253.0, 253.0
Scale
0.00023935, 0.00023935006
Rotation
-0.04
Coordinate System Projection:
TAN
Quality
Full
FITS Header
Notes
WCS retrieved using CXCs PinpointWCS
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 Center
Publisher ID
chandra
Resource ID
0237_xray.tif
Metadata Date
2012-07-27T15:27:06-04:00
Metadata Version
1.2
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Detailed color mapping information coming soon...

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Universescalefull
10,000 light years