Public Surveys @ ESO
Magda Arnaboldi,
Head - Archive Science Group
marnabol@eso.org

Outline Why (does ESO carry out PublicSurveys) ?
 What (are the Public Surveys projects@ESO) ?
 When (did ESO start) ?
 How (is it done)?
 Highlights
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Why?
 Observational astronomy is in an era of surveys

SDSS, UKIDSS,
Pan-STARRS, SkyMapper and LSST . These projects all entail large
investment in survey “systems” which include dedicated telescopes andinstruments to data distribution. GOAL: target new science in a varietyof fields and serve broad communities.
 ESO has a strong background in survey projects (ESO/SERC southernsky survey 1974 - 1987, EIS).
 ESO operates dedicated telescopes, VST and VISTA , and organizes
public surveys projects. ESO holds peer review periodically to ensure
legacy value and scientific excellence of the survey program.
 In the current implementation for ESO public survey projects, thecommunity carries out all those activities that go beyond those enlisted in
the ESO mission statement .
 The ESO Science Archive Facility is the collection point for the survey
products and the primary point of publication/availability of these products
to the ESO community (as per ESO Council Meeting 104, 17–18 December 2004).
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What?
 Public Surveys
 Very large programmes (>2 years)
 Legacy value for astronomical community at large (*)
 All raw observations are immediately public Survey teams commit to deliver reduced images/spectra andcatalogues within ~yearly releases
VISTA PSVST PS(*) Several teams presenting their results at the national Astr. Soc. meetings
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What? VST Public Surveys
AreaSurvey(deg2)

KIDS

1500

Atlas

4000

VPHAS+~2000

Filters

Magnitude limitsu’ g’

24.1, 24.6,

r’ i’

24.4, 23.4

u’ g’

22.0, 22.2,

r’ i’

22.2, 21.3,

z’

20.5

u’ g’

21.8, 22.5,

r’21.6, 22.5,

Hi’

Deep high z

Whole Sky

Galactic

Depthmeasure10σ (AB)

10σ (AB)

10σ (AB)

21.8

Extragalactic

Resolved SFH

Start of operations of VST + Omegacam 15.10.2011, already 100 deg2
acquired for KIDS, excellent data quality for weak grav. lensing
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What? VISTA Public Surveys
Surveys

Area (deg2)

Area Observed

Filters

Magnitude limit

Observation hours

5σ (AB), 10σ (AB) x VMC

taken (Apr 2012)

Y J H Ks

25.7, 25.5, 25.1, 24.5

475

Y J H Ks
NB118

26.7, 26.6, 26.1, 25.6 26.0

(Apr 2012)

UltraVISTA

1.7 deep

1.7

0.73
ultra-deep

VHS17800>4208

Y J H Ks

21.2, 21.1, 20.6, 20.0

1165

VIDEO

12.0

10

Z Y J H Ks

25.7 24.6 24.5 24.0 23.5

379

VVV560562

Z Y J H Ks

21.9 21.1 20.2 18.2 18.1

430

VIKING

1500>470Z Y J H Ks

23.1 22.3 22.1 21.5 21.2

616

VMC

180

54.3

Y J Ks21.9, 21.4, 20.3

325

Deep high z

Whole SkyIAU XX VIII GA
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Galactic

Extragalactic

Resolved SFH

What? Public Spectroscopic
Surveys Gaia - ESO (PIs: Gilmore, Randich) Time allocation 60n/yr over 4yr on UT2 FLAMES – Start 01.2012• extension to 5 yr (300n) pending formal review

 105 stars in all major components of the MW, 100 open clusters
 Synergy with Gaia – phase space structure and abundances for
Milky Way stellar populations
 Target selection: VHS, VVV, WFI and other optical photometry PESSTO (PI: S. Smartt) Time allocation 90n/yr over 4yr (+ 5th year pending formal review)
 EFOSC2 and SOFI on NTT – single target spectroscopy ofTransient Universe: start 04.2012
 Follow up of ~150 transient objects in an unbiased sample ofnearby galaxies drawn from ongoing surveys
 SN explosion physics, SN progenitors
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When?
 Letters of intent and proposals for VST public surveys - 2005
 Letters of intent and proposals for VISTA public surveys -2006
 Letters of intent and proposals for Spectroscopic public surveys- 2010
 VISTA and VST – survey telescopes
 6 VISTA Public Surveys started on April 1, 2010
 3 VST Public Surveys started on October 15, 2011

 In 2012: start of two spectroscopic public surveys
 VLT/FLAMES and NTT/EFOSC2+SOFI There are 11 public survey projects currently on-going

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How? Policies
 ESO – operation, data delivery & archive Provides & operates observing facilities: telescopes, instruments, SM & VM
 Delivers raw data and makes them immediately public Archives data products and publish them to the astronomical community
 Organizes high level reviews for monitoring survey progress and ensure
scientific excellence Public survey teams – obs. strategy, data reduction,analysis, and delivery of data products
 Prepare and run the observations
 Run final quality control and data reduction
 Deliver reduced images, spectra, catalogues to ESO SAF
 Yearly incremental releases + final release
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How? Telescopes for surveys
VISTA & VST
VIRCAM

VST

OmegaCam

VISTA•Observations carried out in service mode
•1800 – 3400h per programme, several thousands Obs
each semester•Expected to run ~6-8 yrs
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How? Telescopes for surveys
Flames@UT2 and EFOSC/SOFI@ NTT

FLAMES@UT2

EFOSC&SOFI @ NTT•Observations carried out invisitor mode
•Expected to run for 4-5 yrs

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How? Optical & NIR surveys
and telescopes
Telescope
Diameter

FoV

Etendu[m2 deg2]

GroundSkyMapper
Pan-STARRS 1

1.4 5.7 deg2
1.8 2.8ºx2.9º

6.6
16.3

0.500 0.32-0.95
0.300 0.4-1.15

SDSS
MegaCam

2.53.6 0.96ºx 0.94º

6.0
7.6

0.394 0.33-1.0
0.187 0.34-0.95

CTIO (DES)

4.0 4.0 deg2

16.0~0.20 0.6-1.0

VISTA

4.0 1.65ºdeg circ

5.20.339 0.88-2.15

SuprimeCam
VLT HAWK-I
VLT-VIMOSLBC@LBT
VSTSubaru
HyperSuprime
LSST

8.0 34„x27‟
8.2 7.5„x7.5‟
8.2 4 x 7„x8‟
8.4 23‟x23‟
2.6 1 deg2
8.0 1.5 deg circ

13.5
0.81
3.2
8.1
5.5
94

0.200 0.36-1
0.106 1-2.2
0.205 0.36-1
0.230 0.32-1.0
0.210 0.33-1.0
0.17 0.36-1

8.4 3.5 deg circ319

0.200 0.33-1.07

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Pixel size[arcsec/pixel]

Wavelengthrange [µm]

How? Phase 3, data releases andcommunity access via ESO SAF
 Phase 3 – final step in the execution of PS. New Phase 3 infrastructure
allows reception, validation and publication of data products from PS to theESO SAF – http://ww.eso.org/sci/observing/phase3/
 Data standards characterize level of data reduction & track provenance Data products (DPs) – images, weight maps, source lists and catalogues(spectra + catalogues)

http://archive.eso.org/wdb/wdb/adp/phase3_vircam/form
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How? Phase 3, data releases andcommunity access via ESO SAF
 VISTA DR1 – about 7 TB of data products (DPs) announced on ESO web pages, ESO newsletter & Messenger
 VISTA DR2 and catalogue release – upload ongoing &publication planned for 2012 Q4
 DPs available from the newly deployed query interfaces

Data products are available fordownload by the astronomicalcommunity worldwide!

http://archive.eso.org/wdb/wdb/adp/phase3_vircam/form
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How? Phase 3, data releases andcommunity access via ESO SAF
SurveySubmission
Date

Date ofObservatio
nsRelease Content

Passbands

Skycoverage(sq.deg)

Type of Data
ProductsTotal
volumeTotal
numberof files

VISTA
tileimages

Pub. date

VVV

03.05.2011

Feb 2010 –Sep 2010

Contiguous patch of bulge
and disk region including
multi-epoch data in Ks

ZYJHKs~520(348 tiles)

Tiles, single-bandsource lists

1.5 TB

7980

2660

25.07.2011

VIDEO

03.05.2011

Nov 2009 –Feb 2010

XMM-LSS field

YJHKs

1.5Tiles, single-bandsource lists

24 GB

291

97

25.07.2011

VMC

08.09. 2011

Nov 2009 –Nov 2010

2 tiles in the LMC: one
overlapping the 30
Doradus and the other theSouth Ecliptic Pole region

YJKs

3

Stacked tiles andpawprints, single-band
and band-merged
source lists

8.1 GB

1256

625.09.2011

VHS15.09.2011

Nov 2009 –Sep 2010

VHS DES: 120 secs in
JHK
VHS ATLAS: 60 secs in
YJHK
VHS GPS: 60 secs in JK

YJHKs

~1910

Tiles, pawprints,
single-band source
lists

3.9 TB

96474

4560

17.10.2011

Deep imaging of theCOSMOS field

YJHKs,
NB118

UltraVISTA

VIKING

17.10.2011

06.10.2011–30.01.2012

Dec 2009 –Apr 2010

10.10.2011

Phase 3 data submission to be closed by P.I.

1.5

Stacked images,
SExtractor catalogues
including Ks-selected
multi-band catalogue

87 GB

1987Gb1919 GB6276

55

15.02.2012
15.02.2012

Date: 20.02.2012
Date: 20.02.2012
Phase
3 start of operations: 10 March 2011
DPs available from http://archive.eso.org/wdb/wdb/adp/phase3_vircam/form
Release descriptions at http://www.eso.org/sci/observing/phase3/data_releases.html

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How? Phase 3, data releases andcommunity access via ESO SAF
The VISTA public survey
DPs released through thePhase 3 process in
2011/2012 cover almost
2500 square degrees ofthe Southern Hemisphere.
VHS - green,
VVV - red,
VMC - yellow,
VIDEO - pink,UltraVISTA - black
Entire survey footprints
are shown in light blue.

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Catalogue datadelivery from theVISTA PS. High level
DPs including light
curves (VMC, VVV).
ESO SAF will deploy
new query interface
for the explorationof the catalogues’
content and data
download

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Highlights - I
 Eleven public survey projects ongoing – several

hundreds astronomers involved as PIs,co-Is Nine ESO press releases based on VISTA data
since 01/2010
 Four ESO press releases based on VST data since01/2011
 23 refereed papers from ESO public surveys
 ESO workshop 15 – 18 Oct, 2012 on “Science fromthe next generation imaging and spectroscopicsurveys” http://www.eso.org/sci/meetings/2012/surveys2012.html
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ESO Public Surveys –Workshop 15-18 Oct 2012

More information at
http://www.eso.org/sci/meetings/2012/surveys2012.html

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Highlights - II
 Eleven public survey projects ongoing – several hundreds astronomers

involved as PIs,co-Is Nine ESO press releases based on VISTA data since 01/2010
 Four ESO press releases based on VST data since 01/2011
 23 refereed papers from ESO public surveys
 ESO workshop 15 – 18 Oct, 2012 on “Science from the next generation
imaging and spectroscopic surveys”
http://www.eso.org/sci/meetings/2012/surveys2012.html

 First public data release from VISTA PS on 12/2011

 More than five thousands files and ~ 2.0 TB of

VISTA data products downloaded by thecommunity.
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 Thanks to the PS PIs and their collaborators forthe hard work!

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