Sixteen scientists from UB among the two hundred members of the Gaia DPAC meeting in Leiden, to review the current status of preparations for Gaia catalogue release next summer.

From 16 to 20 November 2015, about two hundred members of the Gaia Data Processing and Analysis Consortium (DPAC) are meeting in Leiden, The Netherlands, to review the current status of preparations for future catalogue releases from ESA’s billion star surveyor mission.

Launched in December 2013, ESA’s Gaia satellite started routine scientific operations on 25 July 2014. As it scans the sky from its location at the L2 Lagrange point, Gaia records the position, brightness, and colours of any object brighter than 20th magnitude that crosses its field of view.

During its five-year nominal mission, this will amount to positions of a billion stars in our Milky Way galaxy from which their distances and motions can be reconstructed with unprecedented accuracy. The brightness and colour measurements provide the information needed to determine the luminosity, temperature, composition and other physical characteristics of most of these stars. This huge stellar census will provide a foundation for tackling an enormous range of important problems related to the origin, structure and evolutionary history of our Galaxy.

By now, Gaia has accumulated about 340 billion positional or astrometric measurements, 68 billion brightness or photometric data points, and 6.7 billion spectra. Each of these data points is associated with a celestial object that passed across the Gaia focal plane during a scan. But this in itself is not sufficient to produce the absolute astrometric parameters – position, parallax and proper motion – that are the ultimate goal of Gaia. These parameters can only be obtained by solving a complex mathematical and numerical framework that finds the best fit for the data and provides a satisfactory global astrometric solution. For the brightest stars of the sample it is possible to add yet another kinematic piece of information, when the radial velocity is extracted from the observed spectra.

Disentangling these data and determining the solution is therefore a huge task in terms of expertise, effort and dedicated computing power. In 2006, the Data Processing and Analysis Consortium (DPAC), a large pan-European team of expert scientists and software developers, was given the task of preparing for, and producing the Gaia catalogues.

Participation in DPAC. Credit: ESA

The consortium consists of nine coordination units (CU), each focussing on a particular set of data processing tasks. In turn, the coordination units are supported by six data processing centres (DPC) hosting the computer hardware needed for the work.

Now, after more than a year of routine science operations and with over one-quarter of the total data expected for the five-year mission already to hand, DPAC members are in an ideal position to take stock of their achievements to date and to prepare for the next major milestones, in particular, the first Intermediate Data Release. This catalogue will be based on data from the first year of Gaia’s observations, and the current release scenario foresees its publication in mid-2016.


Although the individual CUs and DPCs hold regular meetings and teleconferences, and discuss their work collaboratively on a variety of platforms, the meeting in Leiden will provide them with a rare opportunity to share and discuss their work face-to-face with colleagues from all the other units within the consortium.

On the agenda are several plenary sessions to present the current status. There will also be a number of splinter sessions dedicated to specific data processing topics, during which the scientists will have a chance to work with one another and iron out possible issues that have emerged during the past year, all with the aim of meeting the goal of the first intermediate catalogue result next year.



buy homework table professional resume writing services virginia some who will write my paper help with college assignments argumentative essay about is homework helpful or harmful thesis writing help malaysia help in research paper writing graduate admissions essay education history essay help resume for medical practice administrator admission essays services dissertation proposal writing service uk cv writing service cv writing service us uk help with my thesis statement master thesis organizational behavior cv writing service teachers research paper social anxiety disorder cv writing services oxford cv writing services south africa best resume writing services 2014 affordable powerpoint presentation order resume writing service chicago buy a doctoral dissertation kent hovind roman baths homework help get avandia without prescription 5 mg nortriptyline with no prescription baralgifen no prescription uk online help with essays can i write my own business plan dental sealant lesson plan essay24 how to do my assignments online can you do my homework for me autism spectrum disorder thesis statement stop taking metoprolol help with my social work assignment job description for medical assistant resume buy geology papers dissertation die pflaumen have you used an essay writing service essay writer online tumblr phd research proposal in computer science acute stress disorder case study business plan for metal fabrication shop buy famvir online without prescription write my paper money chapter 1 cardiovascular disorders case study 16 money cant buy happiness essays andy warhol homework help persuasive essay rap music narrative essay disobeying order level english essay help dissertation help ireland literature resume of purchase officer business plan for medical spa scientific manuscript editing services need help with english essay essay editing services proquest order a copy of my dissertation yale essay help newspaper writing grade 5 professional resume writing service miami masters thesis company fpga why should i do my assignment resume format for mechanic phd thesis buy recommendation letter writing service 100mg evista tablets online research paper writing company review best resume and cover letter writing services thesis about eating disorders professional resume writing services los angeles list of skills for medical assistant resume 10 page research paper for sale a good friend essay order of resume application and cover letter harvard case study groupon prostate cancer statistics in jamaica homework help for math thesis order table of contents letter of intent property purchase how to put bibliography in alphabetical order hs homework help examples of cover letters for medical receptionist writing book review high school u s history homework help resume objective statement for medical billing e homework help admission essay custom writing uk help with college algebra homework educational philosophy papers help homework need buy super p-force vancouver blood pressure tracking charts how to write a perfect dissertation cv writing services nz academic writing companies in usa thesis on production and operation management dissertation defense power point presentation homework help with answers purchase contrast and comparison essay site kids homework help sites thesis helper free help writing a speech for student council professional article writing services accounting information system assignment help help with homework questions card paper online dissertation proposal paper essay on buy american homework help ilc grade 11 homework help multiplying decimals business plan writers ontario dissertation diversity audit 2.5 mg viagra caps generic 30 60 90 day business plan for sales managers help with dissertation writing ks2 acheter etodolac professional resume writing service malaysia dissertation rhinoc ros ionesco help with geography homework ks3 essay service clubs admissions college essay help 4 custom writing service for middle school termpapers for sale five paragraph order skeleton purchase a dissertation need an abstract help writing dissertation proposal doctoral best cv writing service london usa essay writer singapore how to find hiring manager for cover letter rme homework help testosterone for the treatment of diabetes write my essay for money prayer in schools thesis custom paper gift bags help with business finance homework seattle public library online homework help executive resume writing services ottawa objective for medical assistant resume samples help with cost accounting homework 4th grade homework help the ladders resume writing service cost standard and scientific notation homework help cheap content writing service buy literature review online best resume writing services for educators rated writing letters of recommendation for medical school engineering resume help buy psychology essay cv writing service us birmingham resume writing service pasadena ca research papers for mechanical engineering financial services resume writing service profile writing services online dating resume writing services orlando fl critical thinking scenarios for medical assistants transition words for essay aol high school homework help buy resume for writing the objective help with trig homework seroquel gocce 25 mg foglietto illustrativo custom essay club write my thesis conclusion essay on how you help your parents ocr philosophy of religion essays do advertisements contribute to unhappiness and dissatisfaction sat essay brooklyn public library homework help paper cheapest parts of speech homework helper brand tritace online mastercard buy cheap paper lanterns research paper on sleep disorders cheap paper plates canada college essay writer hire list of essays written by jose rizal papers online free brand name bupron sr no prescription purchase a dissertation proposal master paper writers review essay about pubs convention dissertation best online resume writing services any vectron source senior plan 500mg benadryl no prescription best personal statement writing services how to write a personal statement for medical residency homework help middle school resume format for mechanical engineers doc literature review on avoidant personality disorder dissertation christoph bertling pharmacy school admissions essay best will writing service write my paper theatre help with essay writing toronto cover letter for sales manager role help writing a critique essay college application essay service yale master thesis communication for development best college application essay service books