News 2020 - Gaia
12/06/2020 Update to the Gaia DR2 known issues
As described in Section 5.1 of the paper Gaia Data Release 2: The astrometric solution, there are strong indications that the Gaia DR2 positions and proper motions for stars with G ≲12 mag have a significant orientation and rotation bias, respectively. It is advisable to correct for these biases for high-accuracy applications and/or applications that cover long time intervals. A new item on the orientation and rotation of the Gaia DR2 reference frame for bright objects has been added to the Gaia DR2 known issues to help you guide to the corrections available. Also the Gaia DR2 primer has been updated to reflect this information.
07/05/2020 Gaia Archive upgrade to version 2.8
On Monday 11 May, a new version of the Gaia Archive will be deployed. The Gaia Archive will hence be unavailable in the morning and should be ready to be accessed again by 13:00 CEST. Apart from some fixes, there is an update to the ADQL supported functions and an improvement with respect to the interoperability with VO tools. More details will be available in the release notes on Monday 11 May from 13:00 CEST.
07/05/2020 Gaps in Gaia DR2 data
A description and overview of gaps in the data stream that underlies the Gaia DR2 data products can be found here.
25/04/2020 Gaia DR2 - second anniversary
Today the Gaia Mission celebrates the second anniversary of Gaia Data Release 2. The Gaia catalogues have been embraced by many scientists across the world. Today, we are proud of the many papers that appeared using our latest release, Gaia DR2. In the past 2 years, almost 3000 refereed papers based on Gaia Data Release 2 have been published. That amounts on average to 4 papers per day. Thank you for using our data with so much enthusiasm! In the meantime, ESA Gaia teams and Gaia DPAC are continuously working towards next data releases. Keep posted with our Gaia newsletter of upcoming releases.
Gaia's first release came out on 14 September 2016. On 25 April 2018, the Gaia Collaboration published its second date release.
20/03/2020 Gaia Newsletter Issue #10
Please find the latest issue of the Gaia Newsletter here.
The COVID-19 virus is spreading across the globe and its impact is also felt in the Gaia collaboration. The data processing effort is distributed over many European countries which adopt different approaches to fight the pandemic. In some countries, restrictions are very severe and the situation is rapidly changing towards more restrictions everywhere.
The schedule towards Gaia (E)DR3 is already affected and more delays can be anticipated. Those scientists and computer engineers in the Gaia Data Processing and Analysis Consortium (DPAC) who can work are now mostly working from home, but their priority is their own health and that of their families. Furthermore, resolving problems with computer hardware takes longer than usual due to the absence of personnel on operational sites.
Therefore, schedule delays of both Gaia Early DR3 and Gaia DR3 are inevitable, but can only be quantified after more clarity of the overall situation has been achieved. As soon as possible, a new schedule for the releases will be announced. While data processing has slowed down, the good news is that Gaia continues to collect valuable science data. With this note we wish everyone good health in the coming times.
06/03/2020 Gaia's latest science stories
Milky Way's warp caused by Galactic collision, Gaia suggests: Astronomers have pondered for years why our galaxy, the Milky Way, is warped. Data from ESA's star-mapping satellite Gaia suggest the distortion might be caused by an ongoing collision with another, smaller, galaxy, which sends ripples through the galactic disc like a rock thrown into water. Further reading here.
Global Gaia campaign reveals secrets of stellar pair: A 500-day global observation campaign spearheaded more than three years ago by ESA’s galaxy-mapping powerhouse Gaia has provided unprecedented insights into the binary system of stars that caused an unusual brightening of an even more distant star. Further reading here.
12/02/2020 Gaia Archive shortly unaccessible through archives.esac.esa.int/gaia
On February 17th between 14:00 and 15:00 CET, there will be a downtime of the archives.esac.esa.int machine. This means that anyone trying to access the Gaia Archives through the link archives.esac.esa.int/gaia will not be able to reach the Gaia Archive. During this period, please access the Gaia Archive using https://gea.esac.esa.int/archive/.
11/02/2020 Network outage at ESAC
Due to a network downtime at ESAC, several Gaia DPAC services are affected: Gaia Jira, Gaia DPAC wiki and Gaia Helpdesk. Some other services may experience problems as well. We hope to get things up as soon as possible.
16/01/2020 Gaia Archive upgrades to https
Please be reminded that the Gaia Archive will only be served using https starting on 1 February 2020, this in order to improve security. Requests to the old http access point will automatically be redirected. However, existing scripts may fail to be rerouted. For example, you may experience problems with old astroquery versions or hard coded URLs. Please update astroquery, or replace http by https in your code when needed. Some examples can be found in the GUI Help => Command line access. Please contact the Gaia Helpdesk if you still experience problems.
15/01/2020 Updated version of the Gaia DR2 primer
The Gaia DR2 primer has been updated to version 1.1. Apart from fixing some typos, some extra explanation is given on the TCB and links were added to the guide-to-scientists videos. Today's added known issue can also be found in the primer now.
Today we updated the Gaia DR2 known issues page with information on missing objects in the neighbourhood cross-match table with Gaia DR1 sources. This table contains the G-band magnitude difference, the angular distance, and an empirical metric combining both quantities (called “rank”), for all possible matches between Gaia DR1 and Gaia DR2 sources.
Please read through the new known issue carefully to see if it affects how you use Gaia data.