Cassiopeia A at Dusk

https://www.nrao.edu/archives/plugins/Dropbox/files/cas_a_vla_hi.jpg

Description

A radio image of Cassiopeia A, which is a young supernova remnant nearby in our Galaxy, composited with a photograph of the NRAO Very Large Array telescope at dusk. Cassiopeia A is the brightest radio source in the sky except the Sun. It is about 10 light years across and about 10,000 light years away. It is the remnant of a supernova explosion that occurred approximately 300 years ago.
The VLA image of Cassiopeia A is courtesy of NRAO and R. Perley, and was made at a frequency of 1.38 GHz using the NRAO Very Large Array. The resolution is 1.3". The brightness scale runs from deep brown through blue to white. In addition, areas where the brightness gradients are steep are highlighted faintly in red. The original radio data was taken from the NRAO CD-ROM: "Images of the Radio Universe", 1992.

Creator

Legacy Astronomical Images

Rights

NRAO/AUI/NSF does not hold full copyright for this image. Contact the archivist for details.

Type

Legacy Astronomical Image

Object Name

Cassiopeia A

Photo Credit

Michael Bietenholz, York University
Data courtesy of NRAO and R. Perley

Investigators

M. Anderson, L. Rudnick, P. Leppik, R. Perley, R. Braun

Telescope

Very Large Array (VLA)

Observation Date

1987-07-30

Type of Observation

continuum

Band

L

Wavelength

20 cm

Frequency

1.4 GHz

Center of Image

RA 23:23:24.000, Dec: 58:48:54.000 (J2000)

Field of View

0.108333 x 0.108333 degrees

Link to journal article

Notes

Contact the archivist for a high resolution tif of this image.

Series

Galactic Sources Series

Unit

Supernova Remnants Unit

Citation

Legacy Astronomical Images, “Cassiopeia A at Dusk,” NRAO Archives, accessed December 3, 2021, https://www.nrao.edu/archives/items/show/33523.