Supernova 1993J and its Fourier Transform

https://www.nrao.edu/archives/plugins/Dropbox/files/sn1993j_vlbi_hi.jpg

Description

Supernova 1993J as seen with Very Long Baseline Interferometry. This image is made from observations using a world-wide array of 18 radio telescopes, including the NRAO Very Long Baseline Array, Very Large Array, Green Bank Telescope and antennas of the European VLBI Network and the NASA Deep Space Network. The whitish-yellow, glowing object is a radio-image of SN 1993J at a frequency of 8.4 GHz. The ring-shaped "mountains" on the ground represent the actual measurements made by the radio interferometer from which the radio-image was made. Mathematically speaking the radio-image is the Fourier transform of the measurements. Supernova 1993J exploded in 1993 in the galaxy M81, approximately 12 million light years away. The spherical shell of gas is expanding with a speed of about 5000 miles/sec. This spherical shell produces the ring-like structure seen in the radio image. The diameter is about one-half of a light year.
The VLBI Image was made by combining global Array observations made on three sessions between 1998 Dec. to 200 Nov. (PI N. Bartel; see Bietenholz, Bartel & Rupen, ApJ, 597, 2003 for details; see also Bartel et al, 2000, Science, 287, 112; Bietenholz, Bartel, & Rupen, 2001, ApJ, 557, 770; Bartel et al, 2002, 581, 404). The resolution is 0.7 milli-arcsecs. The "ground" shows the Fourier transform of the image, or the uv-plane.

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

SN 1993J

Photo Credit

Michael Bietenholz, York University

Investigators

N. Bartel, M. Bietenholz, M. Rupen

Telescope

Very Long Baseline Array (VLBA)
EVN
DSN

Observation Date

2000-11-12

Type of Observation

continuum

Band

X

Wavelength

3.6 cm

Frequency

8.4 GHz

Center of Image

RA 9:55:24.775, Dec: 69:1:13.704 (J2000)

Field of View

0.000002 x 0.000002 degrees

Link to journal article

Notes

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

Series

Galactic Sources Series

Unit

Supernovae Unit

Citation

Legacy Astronomical Images, “Supernova 1993J and its Fourier Transform,” NRAO Archives, accessed August 12, 2022, https://www.nrao.edu/archives/items/show/33527.