Unexplained brightening of AKO 9 in 47 Tucanae

Eso_eso9703a_1024

eso_eso9703a January 15th, 1997

Credit: ESO

This is a reproduction of two images obtained in late 1996 with the Hubble Space Telescope (HST) , showing the field of the variable star AKO 9 at the centre of the southern globular cluster 47 Tucanae .

This star brightened by more than 2 magnitudes (a factor of seven) in less than 1 hour. Left: the first frame; right: the last frame in a series of 15 exposures, obtained during a period of just over 4 hours.

Yhe field of each image measures 3.9 arcsec x 3.9 arcsec. North is up and East is to the left.No other star among the > 30,000 studied was found to have such a large amplitude.

Provider: European Southern Observatory

Image Source: https://www.eso.org/public/images/eso9703a/

Curator: European Southern Observatory, Garching bei München, Germany

Image Use Policy: Creative Commons Attribution 4.0 International License

View Options

Image Details

Image Type
Observation
Object Name
47 Tucanae AKO 9
Subject - Milky Way
Star > Type > Variable
Star > Grouping > Cluster > Globular

Color Mapping

  Telescope Spectral Band Wavelength
Red Hubble (WFPC2) Ultraviolet (U) 300.0 nm
Spectrum_base
Red
Eso_eso9703a_1280
×
ID
eso9703a
Subject Category
B.3.2.1   B.3.6.4.2  
Subject Name
47 Tucanae, AKO 9
Credits
ESO
Release Date
1997-01-15T00:00:00
Lightyears
Redshift
Reference Url
https://www.eso.org/public/images/eso9703a/
Type
Observation
Image Quality
Distance Notes
Facility
Hubble Space Telescope
Instrument
WFPC2
Color Assignment
Red
Band
Ultraviolet
Bandpass
U
Central Wavelength
300
Start Time
Integration Time
4350
Dataset ID
Notes
Coordinate Frame
Equinox
Reference Value
Reference Dimension
3284.0, 1629.0
Reference Pixel
Scale
Rotation
Coordinate System Projection:
Quality
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
eso9703a
Metadata Date
2010-01-20T11:33:31+01:00
Metadata Version
1.1
×

 

Detailed color mapping information coming soon...

×

There is no distance meta data in this image.

 

Providers | Sign In