An infrared portrait of the barred spiral galaxy Messier 83

Eso_eso0136a_1024

eso_eso0136a November 29th, 2001

Credit: ESO

The image is a false-colour infrared photo of the nearby barred spiral galaxy Messier 83. It is based on the combination of three images obtained in the Ks- (wavelength 2.2 µm), J- (1.2 µm) and I-bands (0.8 µm), respectively. The first two were recorded with the SOFI instrument at the ESO 3.5-m New Technology Telescope , the third with the DFOSC instrument at the Danish 1.54-m telescope, both at the La Silla Observatory. Technical information: This image of Messier 83 is based on a composite of three images in the filters Ks (NTT + SOFI ; wavelength 2.162 µm; Full-Width-Half-Maximum (FWHM) 0.275 µm; total exposure time on target 49 min; approx. 12 min per quadrant; here rendered as red); J (NTT + SOFI; 1.247 µm; 0.290 µm; 22 min; 5 min; green), and I (Danish 1.54-m + DFOSC ; 0.797 µm; 0.142 µm; 20 min; full-field coverage; blue). As indicated, the Ks and J images were created from exposures of four neighbouring fields. These images were taken in May 2001 during a period with 1.0 arcsec average seeing. The original frames have 1024 x 1024 pixels, each measuring 0.29 arcsec. The resulting mosaic was created from 31 Ks-band object frames and 17 J-band object frames, each with 100 sec exposure time. From each object frame, a sky frame with the same exposure time was subtracted to remove the sky contribution. The final size of the mosaic image is 1905 x 1839 pixels (9.2 x 8.9 arcmin). The I image was observed in February 1998 by Søren Larsen (more information about this image is available in "Astronomy and Astrophysics Supplement", Vol 139, p.393-415, 1999 and at URL: http://nedwww.ipac.caltech.edu/). The original frame size was 2036 x 2042 pixels, each measuring 0.39 arcsec. The pixel size and the field-of-view of this image was changed to match the characteristics of the Ks and J images. North is up and east to the left.

Provider: European Southern Observatory

Image Source: https://www.eso.org/public/images/eso0136a/

Curator: European Southern Observatory, Garching bei München, Germany

Image Use Policy: Creative Commons Attribution 4.0 International License

Image Details

Image Type
Observation
Object Name
M 83 Messier 83 NGC 5236
Subject - Local Universe
Galaxy > Type > Barred
Eso_eso0136a_128
 

Position Details

Position (ICRS)
RA = 13h 37m 1.0s
DEC = -29° 51’ 56.1”
Orientation
North is 0.1° CCW
Field of View
9.0 x 8.8 arcminutes
Constellation
Hydra

Color Mapping

  Telescope Spectral Band Wavelength
Red NTT (SOFI) Infrared (K) 2.2 µm
Green NTT (SOFI) Infrared (J) 1.2 µm
Blue ESO-Danish-1.54m (DFOSC) Infrared (I) 800.0 nm
Spectrum_base
Red
Green
Blue
Eso_eso0136a_1280
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ID
eso0136a
Subject Category
C.5.1.2  
Subject Name
M 83, Messier 83, NGC 5236
Credits
ESO
Release Date
2001-11-29T00:00:00
Lightyears
Redshift
Reference Url
https://www.eso.org/public/images/eso0136a/
Type
Observation
Image Quality
Distance Notes
Facility
New Technology Telescope, New Technology Telescope, Danish 1.54-metre telescope
Instrument
SOFI, SOFI, DFOSC
Color Assignment
Red, Green, Blue
Band
Infrared, Infrared, Infrared
Bandpass
K, J, I
Central Wavelength
2200, 1200, 800
Start Time
Integration Time
Dataset ID
Notes
Coordinate Frame
ICRS
Equinox
J2000
Reference Value
204.253991, -29.865596
Reference Dimension
2271.0, 2203.0
Reference Pixel
1016.1928247, 1129.14403652
Scale
-6.620935e-05, 6.620935e-05
Rotation
0.10627298932
Coordinate System Projection:
TAN
Quality
Full
FITS Header
Notes
Creator (Curator)
European Southern Observatory
URL
http://www.eso.org/
Name
Email
Telephone
Address
Karl-Schwarzschild-Strasse 2
City
Garching bei München
State/Province
Postal Code
D-85748
Country
Germany
Rights
Creative Commons Attribution 4.0 International License
Publisher
European Southern Observatory
Publisher ID
eso
Resource ID
eso0136a
Metadata Date
2009-01-07T16:22:18+01:00
Metadata Version
1.1
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Detailed color mapping information coming soon...

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There is no distance meta data in this image.

 

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