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S. Koyama

15 papers hereh-index 9238 citations21 works total

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

author position
  • first author1
  • middle author10
  • last author1

Across the 12 of 15 papers where every author was matched, so the position is known.

fields
  • astro-ph.HE13
  • astro-ph.CO1
  • astro-ph.SR1
same name
  • S. Koyama — 75 papers, h 31
  • S. Koyama — 32 papers, h 23
  • S. Koyama — 16 papers, h 13
  • S. Koyama — 9 papers, h 14
  • S. Koyama — 9 papers, h 4
  • S. Koyama — 8 papers, h 3

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
20102024
most citedRadio and gamma-ray follow-up of the exceptionally high activity state of PKS 1510-089 in 2011

66 citations · 298 across the 14 of their papers we have counts for

collaborators
Showing 2012Show all

2 papers · 1 filter

astro-ph.HE2012★ 66 cited

Radio and gamma-ray follow-up of the exceptionally high activity state of PKS 1510-089 in 2011

M. Orienti, S. Koyama, F. D'Ammando +24

We investigate the radio and gamma-ray variability of the flat spectrum radio quasar PKS 1510-089 in the time range between 2010 November and 2012 January. In this period the sourc…

astro-ph.HE2012★ 15 cited

Possible Detection of Apparent Superluminal inward motion in Markarian 421 after the Giant X-ray flare in February, 2010

K. Niinuma, M. Kino, H. Nagai +7

We report on the VLBI follow-up observations using the Japanese VLBI Network (JVN) array at 22 GHz for the largest X-ray flare of TeV blazar Mrk 421 that occurred in mid-February,…

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