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A. Steffen

17 papers hereh-index 151.9k citations29 works total

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

author position
  • first author3
  • middle author6
  • last author2

Across the 11 of 17 papers where every author was matched, so the position is known.

fields
  • astro-ph16
  • astro-ph.CO1
same name
  • A. Steffen — 1 paper, h 7

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
20012010
most citedThe X-ray-to-Optical Properties of Optically-Selected Active Galaxies Over Wide Luminosity and Redshift Ranges

540 citations · 2.5k across the 17 of their papers we have counts for

collaborators
Showing 2001 · astro-phShow all

2 papers · 2 filters

astro-ph2001★ 58 cited

The Submillimeter Properties of the 1 Ms Chandra Deep Field North X-ray Sample

A. J. Barger, L. L. Cowie, A. T. Steffen +3

We present submillimeter observations for 136 of the 370 X-ray sources detected in the 1 Ms exposure of the Chandra Deep Field North. Ten of the X-ray sources are significantly det…

astro-ph2001★ 67 cited

A Dynamical Mass Constraint for Pre-Main-Sequence Evolutionary Tracks: The Binary NTT 045251+3016

A. T. Steffen, R. D. Mathieu, M. G. Lattanzi +6

We present an astrometric/spectroscopic orbital solution for the pre-main-sequence binary NTT 045251+3016. Our measurements for the primary and secondary masses are 1.45 +/- 0.19 M…

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