St Andrews Research Repository

St Andrews University Home
View Item 
  •   St Andrews Research Repository
  • University of St Andrews Research
  • University of St Andrews Research
  • University of St Andrews Research
  • View Item
  •   St Andrews Research Repository
  • University of St Andrews Research
  • University of St Andrews Research
  • University of St Andrews Research
  • View Item
  •   St Andrews Research Repository
  • University of St Andrews Research
  • University of St Andrews Research
  • University of St Andrews Research
  • View Item
  • Register / Login
JavaScript is disabled for your browser. Some features of this site may not work without it.

Gaia Early Data Release 3 : Gaia photometric science alerts

Thumbnail
View/Open
Hodgkin_2021_Gaia_photometric_science_alerts_A_A_AAM.pdf (7.557Mb)
Date
08/2021
Author
Hodgkin, S. T.
Harrison, D. L.
Breedt, E.
Wevers, T.
Rixon, G.
Delgado, A.
Yoldas, A.
Kostrzewa-Rutkowska, Z.
Wyrzykowski, Ł.
van Leeuwen, M.
Blagorodnova, N.
Campbell, H.
Eappachen, D.
Fraser, M.
Ihanec, N.
Koposov, S. E.
Kruszyńska, K.
Marton, G.
Rybicki, K. A.
Brown, A. G. A.
Burgess, P. W.
Busso, G.
Cowell, S.
De Angeli, F.
Diener, C.
Evans, D. W.
Gilmore, G.
Holland, G.
Jonker, P. G.
van Leeuwen, F.
Mignard, F.
Osborne, P. J.
Portell, J.
Prusti, T.
Richards, P. J.
Riello, M.
Seabroke, G. M.
Walton, N. A.
Ábrahám, Péter
Altavilla, G.
Baker, S. G.
Bastian, U.
O'Brien, P.
de Bruijne, J.
Butterley, T.
Carrasco, J. M.
Castañeda, J.
Clark, J. S.
Clementini, G.
Copperwheat, C. M.
Cropper, M.
Damljanovic, G.
Davidson, M.
Davis, C. J.
Dennefeld, M.
Dhillon, V. S.
Dolding, C.
Dominik, M.
Esquej, P.
Eyer, L.
Fabricius, C.
Fridman, M.
Froebrich, D.
Garralda, N.
Gomboc, A.
González-Vidal, J. J.
Guerra, R.
Hambly, N. C.
Hardy, L. K.
Holl, B.
Hourihane, A.
Japelj, J.
Kann, D. A.
Kiss, C.
Knigge, C.
Kolb, U.
Komossa, S.
Kóspál, Á.
Kovács, G.
Kun, M.
Leto, G.
Lewis, F.
Littlefair, S. P.
Mahabal, A. A.
Mundell, C. G.
Nagy, Z.
Padeletti, D.
Palaversa, L.
Pigulski, A.
Pretorius, M. L.
van Reeven, W.
Ribeiro, V. A. R. M.
Roelens, M.
Rowell, N.
Schartel, N.
Scholz, A.
Schwope, A.
Sipőcz, B. M.
Smartt, S. J.
Smith, M. D.
Serraller, I.
Steeghs, D.
Sullivan, M.
Szabados, L.
Szegedi-Elek, E.
Tisserand, P.
Tomasella, L.
van Velzen, S.
Whitelock, P. A
Wilson, R. W.
Young, D. R.
Keywords
Astronomical instrumentation, methods and techniques
Surveys
Supernovae: general
Quasars: general
Stars: variable: general
QB Astronomy
QC Physics
3rd-DAS
Metadata
Show full item record
Abstract
Context. Since July 2014, the Gaia mission has been engaged in a high-spatial-resolution, time-resolved, precise, accurate astrometric, and photometric survey of the entire sky. Aims. We present the Gaia Science Alerts project, which has been in operation since 1 June 2016. We describe the system which has been developed to enable the discovery and publication of transient photometric events as seen by Gaia. Methods. We outline the data handling, timings, and performances, and we describe the transient detection algorithms and filtering procedures needed to manage the high false alarm rate. We identify two classes of events: (1) sources which are new to Gaia and (2) Gaia sources which have undergone a significant brightening or fading. Validation of the Gaia transit astrometry and photometry was performed, followed by testing of the source environment to minimise contamination from Solar System objects, bright stars, and fainter near-neighbours. Results. We show that the Gaia Science Alerts project suffers from very low contamination, that is there are very few false-positives. We find that the external completeness for supernovae, CE = 0.46, is dominated by the Gaia scanning law and the requirement of detections from both fields-of-view. Where we have two or more scans the internal completeness is CI = 0.79 at 3 arcsec or larger from the centres of galaxies, but it drops closer in, especially within 1 arcsec. Conclusions. The per-transit photometry for Gaia transients is precise to 1 per cent at G = 13, and 3 per cent at G=19. The per-transitastrometry is accurate to 55 milliarcseconds when compared to Gaia DR2. The Gaia Science Alerts project is one of the most homogeneous and productive transient surveys in operation, and it is the only survey which covers the whole sky at high spatial resolution (subarcsecond), including the Galactic plane and bulge.
Citation
Hodgkin , S T , Harrison , D L , Breedt , E , Wevers , T , Rixon , G , Delgado , A , Yoldas , A , Kostrzewa-Rutkowska , Z , Wyrzykowski , Ł , van Leeuwen , M , Blagorodnova , N , Campbell , H , Eappachen , D , Fraser , M , Ihanec , N , Koposov , S E , Kruszyńska , K , Marton , G , Rybicki , K A , Brown , A G A , Burgess , P W , Busso , G , Cowell , S , De Angeli , F , Diener , C , Evans , D W , Gilmore , G , Holland , G , Jonker , P G , van Leeuwen , F , Mignard , F , Osborne , P J , Portell , J , Prusti , T , Richards , P J , Riello , M , Seabroke , G M , Walton , N A , Ábrahám , P , Altavilla , G , Baker , S G , Bastian , U , O'Brien , P , de Bruijne , J , Butterley , T , Carrasco , J M , Castañeda , J , Clark , J S , Clementini , G , Copperwheat , C M , Cropper , M , Damljanovic , G , Davidson , M , Davis , C J , Dennefeld , M , Dhillon , V S , Dolding , C , Dominik , M , Esquej , P , Eyer , L , Fabricius , C , Fridman , M , Froebrich , D , Garralda , N , Gomboc , A , González-Vidal , J J , Guerra , R , Hambly , N C , Hardy , L K , Holl , B , Hourihane , A , Japelj , J , Kann , D A , Kiss , C , Knigge , C , Kolb , U , Komossa , S , Kóspál , Á , Kovács , G , Kun , M , Leto , G , Lewis , F , Littlefair , S P , Mahabal , A A , Mundell , C G , Nagy , Z , Padeletti , D , Palaversa , L , Pigulski , A , Pretorius , M L , van Reeven , W , Ribeiro , V A R M , Roelens , M , Rowell , N , Schartel , N , Scholz , A , Schwope , A , Sipőcz , B M , Smartt , S J , Smith , M D , Serraller , I , Steeghs , D , Sullivan , M , Szabados , L , Szegedi-Elek , E , Tisserand , P , Tomasella , L , van Velzen , S , Whitelock , P A , Wilson , R W & Young , D R 2021 , ' Gaia Early Data Release 3 : Gaia  photometric science alerts ' , Astronomy & Astrophysics , vol. 652 , A76 . https://doi.org/10.1051/0004-6361/202140735
Publication
Astronomy & Astrophysics
Status
Peer reviewed
DOI
https://doi.org/10.1051/0004-6361/202140735
ISSN
0004-6361
Type
Journal article
Rights
Copyright © 2021 ESO. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1051/0004-6361/202140735.
Collections
  • University of St Andrews Research
URL
http://adsabs.harvard.edu/abs/2021arXiv210601394H
URI
http://hdl.handle.net/10023/23366

Items in the St Andrews Research Repository are protected by copyright, with all rights reserved, unless otherwise indicated.

Advanced Search

Browse

All of RepositoryCommunities & CollectionsBy Issue DateNamesTitlesSubjectsClassificationTypeFunderThis CollectionBy Issue DateNamesTitlesSubjectsClassificationTypeFunder

My Account

Login

Open Access

To find out how you can benefit from open access to research, see our library web pages and Open Access blog. For open access help contact: openaccess@st-andrews.ac.uk.

Accessibility

Read our Accessibility statement.

How to submit research papers

The full text of research papers can be submitted to the repository via Pure, the University's research information system. For help see our guide: How to deposit in Pure.

Electronic thesis deposit

Help with deposit.

Repository help

For repository help contact: Digital-Repository@st-andrews.ac.uk.

Give Feedback

Cookie policy

This site may use cookies. Please see Terms and Conditions.

Usage statistics

COUNTER-compliant statistics on downloads from the repository are available from the IRUS-UK Service. Contact us for information.

© University of St Andrews Library

University of St Andrews is a charity registered in Scotland, No SC013532.

  • Facebook
  • Twitter