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researcher

A. Ullan

10 papers hereh-index 10452 citations35 works total

Matching runs newest-first, so older work may not be attached to this profile yet.

author position
  • first author1
  • middle author3
  • last author3

Across the 7 of 10 papers where every author was matched, so the position is known.

fields
  • astro-ph9
  • astro-ph.GA1
same name
  • A. Ullan — 1 paper

Either other researchers who publish under this name, or the same person where the external sources have not merged their records.

identity via Semantic Scholar / OpenAlex

activity
20022009
most citedThe XMM-Newton Serendipitous Survey V. Optical identification of the XMM-Newton Medium sensitivity Survey (XMS)

89 citations · 255 across the 10 of their papers we have counts for

collaborators
Showing 2004Show all

1 paper · 1 filter

astro-ph2004★ 14 cited

New VR magnification ratios of QSO 0957+561

L. J. Goicoechea, R. Gil-Merino, A. Ullan +5

We present VR magnification ratios of QSO 0957+561, which are inferred from the GLITP light curves of Q0957+561A and new frames taken with the 2.56m Nordic Optical Telescope about…

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Not affiliated with arXiv. Researcher data from Semantic Scholar (ODC-BY) and OpenAlex.