IPB

Welcome Guest ( Log In | Register )

LIGO, High Gear Science Run
The Messenger
post Mar 3 2006, 03:05 PM
Post #1


Member
***

Group: Members
Posts: 624
Joined: 10-August 05
Member No.: 460



http://www.spaceref.com/news/viewpr.html?pid=19142

QUOTE
ST. LOUIS, Mo. -- The quest to detect and study gravitational waves with the NSF-funded Laser Interferometer Gravitational-Wave Observatory (LIGO) is now in the fourth month of its first sustained science run since achieving its promised design sensitivity, project personnel announced at the annual meeting of the American Association for the Advancement of Science (AAAS). ...

Now that the LIGO is sensitive enough to detect changes in distance a mere thousandth the diameter of a proton, Marx adds, the science return should be even greater. Recent results from the Swift satellite pinpointing the location of short gamma-ray bursts (GRBs) have also heightened astronomers' interest in the results from LIGO's current observational run.


That level of sensitivity is, in my opinion, the most incredible technical achievement since the VLA.

The very long gamma ray associated with supernova/hypernova 1996aj should also be of great interest.
Go to the top of the page
 
+Quote Post
 
Start new topic
Replies
fredk
post May 28 2019, 05:44 PM
Post #2


Senior Member
****

Group: Members
Posts: 3932
Joined: 17-January 05
Member No.: 152



Yes, the observed gravitational wave amplitude (and frequency and its rate of change) gives the luminosity distance (once you've got a handle on the polarization), but at this level of accuracy that will agree with any other distance measure. Units, though, are comoving. The CMB is at just under 14 comoving Gpc, not 15 000 - see, eg, sect 3.4 of Planck Inflation. So at very crudely a Gpc, this merger is considerably closer.
Go to the top of the page
 
+Quote Post

Posts in this topic
- The Messenger   LIGO   Mar 3 2006, 03:05 PM
- - Richard Trigaux   So we shall soon know if gravity waves really exis...   Mar 3 2006, 03:43 PM
|- - The Messenger   QUOTE (Richard Trigaux @ Mar 3 2006, 08:4...   Mar 3 2006, 05:02 PM
|- - Richard Trigaux   QUOTE (The Messenger @ Mar 3 2006, 06:02 ...   Mar 4 2006, 07:40 AM
- - The Messenger   http://einstein.phys.uwm.edu/forum_thread.php?id=4...   Apr 3 2006, 09:29 PM
- - edstrick   LIGO can potentially detect 1) predicted types of ...   Apr 4 2006, 09:31 AM
|- - Richard Trigaux   QUOTE (edstrick @ Apr 4 2006, 09:31 AM) W...   Apr 4 2006, 10:15 AM
|- - The Messenger   The data being reduced on Einstein at Home compute...   Apr 4 2006, 03:00 PM
- - The Messenger   http://einstein.phys.uwm.edu/forum_thread.php?id=4...   Apr 18 2006, 05:40 PM
- - Holder of the Two Leashes   LIGO team is going to update us all tomorrow, and ...   Feb 10 2016, 03:33 PM
- - Holder of the Two Leashes   News conference about to start. In the auditorium...   Feb 11 2016, 03:30 PM
- - Mongo   Archived Livestream of the press conference has be...   Feb 11 2016, 05:39 PM
- - nprev   Three solar masses converted into energy in millis...   Feb 11 2016, 06:19 PM
- - Mongo   Numerous papers about the discovery can be found a...   Feb 11 2016, 06:29 PM
- - hendric   Nice article about the post-doc who was monitoring...   Feb 11 2016, 06:36 PM
|- - PFK   QUOTE (hendric @ Feb 11 2016, 07:36 PM) N...   Feb 11 2016, 07:08 PM
- - Mongo   An interesting possible second binary black hole m...   Feb 12 2016, 08:22 PM
- - TheAnt   Now that a second black hole merger have been dete...   Jun 20 2016, 03:48 PM
- - moustifouette   First merger of neutron stars detected and observe...   Oct 17 2017, 07:19 AM
|- - JRehling   The neutron star merger is actually bigger news th...   Oct 18 2017, 10:25 PM
|- - fredk   QUOTE (JRehling @ Oct 18 2017, 11:25 PM) ...   Oct 21 2017, 03:10 PM
- - Explorer1   Incredible find! I was under the impression t...   Oct 19 2017, 12:43 AM
|- - TheAnt   QUOTE (Explorer1 @ Oct 19 2017, 02:43 AM)...   Oct 19 2017, 05:27 PM
- - nogal   QUOTE (moustifouette @ Oct 17 2017, 08:19...   Oct 19 2017, 10:00 PM
- - Floyd   It is amazing that a lid was successfully placed o...   Oct 22 2017, 02:24 PM
|- - TheAnt   QUOTE (Floyd @ Oct 22 2017, 04:24 PM) ......   Oct 27 2017, 11:42 AM
- - Holder of the Two Leashes   LIGO and VIRGO are about to begin a new year long ...   Mar 27 2019, 03:10 PM
- - Holder of the Two Leashes   Latest results are the second detected binary neut...   May 3 2019, 03:58 PM
- - antoniseb   S190521g was a binary black hole very far away, p...   May 26 2019, 12:49 AM
- - fredk   The CMB is at around 14 comoving Gpc, not 4.2 (see...   May 26 2019, 04:33 PM
|- - antoniseb   Interesting. Is the GraceDb (https://gracedb.ligo....   May 26 2019, 11:11 PM
- - fredk   Do you mean comoving vs proper distances? It...   May 27 2019, 02:17 AM
|- - Lucas   It appears that they are using luminosity distance...   May 28 2019, 12:24 PM
- - fredk   Yes, the observed gravitational wave amplitude (an...   May 28 2019, 05:44 PM


Reply to this topicStart new topic

 



RSS Lo-Fi Version Time is now: 22nd July 2019 - 03:46 AM
RULES AND GUIDELINES
Please read the Forum Rules and Guidelines before posting.

IMAGE COPYRIGHT
Images posted on UnmannedSpaceflight.com may be copyrighted. Do not reproduce without permission. Read here for further information on space images and copyright.

OPINIONS AND MODERATION
Opinions expressed on UnmannedSpaceflight.com are those of the individual posters and do not necessarily reflect the opinions of UnmannedSpaceflight.com or The Planetary Society. The all-volunteer UnmannedSpaceflight.com moderation team is wholly independent of The Planetary Society. The Planetary Society has no influence over decisions made by the UnmannedSpaceflight.com moderators.
SUPPORT THE FORUM
Unmannedspaceflight.com is a project of the Planetary Society and is funded by donations from visitors and members. Help keep this forum up and running by contributing here.