Update on Largest Optical Telecope

Message boards : SETI@home Science : Update on Largest Optical Telecope

To post messages, you must log in.

AuthorMessage
Sirius B
Volunteer tester
Avatar

Send message
Joined: 26 Dec 00
Posts: 14926
Credit: 2,128,562
RAC: 621
Ireland
Message 1299343 - Posted: 27 Oct 2012, 12:08:32 UTC

Largest Optical Telescope in the World

Update

Some stunning images.


ID: 1299343 · Report as offensive
Profile Johnney Guinness
Volunteer tester
Avatar

Send message
Joined: 11 Sep 06
Posts: 3093
Credit: 2,652,287
RAC: 0
Ireland
Message 1299374 - Posted: 27 Oct 2012, 13:51:25 UTC
Last modified: 27 Oct 2012, 14:03:26 UTC

Great article!

They have an image in the article and they "claim" that it was taken by the ALMA array, but its not. The image is an optical image of a galaxy, its not a radio telescope image. If the image is authentic, then maybe its got ALMA data superimposed on top of the optical image;

On the ALMA website, it has the original images;
http://www.almaobservatory.org/en/visuals/images/astronomy

This is the data for the Antennae Galaxy;
http://www.almaobservatory.org/en/visuals/images/astronomy/?g2_itemId=3431

ALMA did NOT take this image! Its a composite image.



This is the radio data that ALMA took;



John.

ID: 1299374 · Report as offensive
Profile Bob DeWoody
Avatar

Send message
Joined: 9 May 10
Posts: 2697
Credit: 775,642
RAC: 2,430
United States
Message 1299994 - Posted: 28 Oct 2012, 23:12:42 UTC

So, is it an optical telescope or a radio telescope?


Bob DeWoody

My motto: Never do today what you can put off until tomorrow as it may not be required. This no longer applies in light of current events.

ID: 1299994 · Report as offensive
Profile Johnney Guinness
Volunteer tester
Avatar

Send message
Joined: 11 Sep 06
Posts: 3093
Credit: 2,652,287
RAC: 0
Ireland
Message 1299999 - Posted: 28 Oct 2012, 23:21:43 UTC - in response to Message 1299994.  
Last modified: 28 Oct 2012, 23:22:45 UTC

So, is it an optical telescope or a radio telescope?

Its a radio telescope Bob,
The ALMA radio telescope is so powerful, if you compile the data properly, they can convert the radio data into an image. It produces what looks like a blobby image.

In my last post, i posted 2 pictures. One has the radio telescope data in the image on its own. The other picture was probably taken with the Hubble telescope and they superimposed the radio data on top of the Hubble image.

The blobby image is the ALMA radio data image.

John.

ID: 1299999 · Report as offensive
Sirius B
Volunteer tester
Avatar

Send message
Joined: 26 Dec 00
Posts: 14926
Credit: 2,128,562
RAC: 621
Ireland
Message 1301486 - Posted: 2 Nov 2012, 23:51:20 UTC - in response to Message 1299994.  

Good question as the original report states Optical, whereas the Mail says Radio.

According to the ESO, it's Optical.


ID: 1301486 · Report as offensive
Josef W. Segur
Volunteer developer
Volunteer tester

Send message
Joined: 30 Oct 99
Posts: 4504
Credit: 1,414,761
RAC: 0
United States
Message 1301561 - Posted: 3 Nov 2012, 4:33:12 UTC - in response to Message 1299994.  

Both, in the sense that the sub-millimeter wave end of its range overlaps with a part of the electromagnetic spectrum known as far infrared.

However, it gets nowhere near the visible light range which human eyes can perceive.

                                                                    Joe

ID: 1301561 · Report as offensive
John McCallum
Avatar

Send message
Joined: 5 Dec 04
Posts: 838
Credit: 407,736
RAC: 164
United Kingdom
Message 1302144 - Posted: 4 Nov 2012, 16:46:22 UTC - in response to Message 1301486.  
Last modified: 4 Nov 2012, 16:49:19 UTC

If the picture in the Mail is the right one then it is definitely a radio telescope


Old enough to know better(but)still young enough not to care

ID: 1302144 · Report as offensive
Sirius B
Volunteer tester
Avatar

Send message
Joined: 26 Dec 00
Posts: 14926
Credit: 2,128,562
RAC: 621
Ireland
Message 1302295 - Posted: 4 Nov 2012, 22:07:48 UTC - in response to Message 1302144.  

That is a Radio Telescope. On checking back to the original thread, it looks like I made a mistake. What caught me out was the labelling of the report in the Mail as VLT.

There seems to be 2 seperate telescopes in Chile. Check the link in the original thread from the BBC - the photo of the telescope is nothing like the one in the Mail.

Sorry about that guys.

Sidenote: either way, they're both excellent telescopes.


ID: 1302295 · Report as offensive
Profile tullioProject Donor
Volunteer tester

Send message
Joined: 9 Apr 04
Posts: 5714
Credit: 971,443
RAC: 2,977
Italy
Message 1302349 - Posted: 5 Nov 2012, 1:33:25 UTC - in response to Message 1302295.  

There are many optical telescopes in Chile, due to the optimal "seeing". The ALMA is a millimeter band radio telescope, with many antennas.
Tullio


ID: 1302349 · Report as offensive

Message boards : SETI@home Science : Update on Largest Optical Telecope


 
©2016 University of California
 
SETI@home and Astropulse are funded by grants from the National Science Foundation, NASA, and donations from SETI@home volunteers. AstroPulse is funded in part by the NSF through grant AST-0307956.