Variability of the extreme z=4.72 blazar, GB 1428+4217

1); (2) S.I.S.S.A.; (3) Cavendish Laboratories; (4) Dep. Astronomy; A. Celotti (2; A.C. Fabian (1); Astrophysics; Cambridge; G. Pooley (3); Italy

REVIEW

Variability of the extreme z=4.72 blazar, GB 1428+4217

Not yet reviewed by Pith; the record is open.

This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.

SPECIMEN: schema-true, not a live event

T0 review · schema-true

One-sentence machine reading of the paper's core claim.

pith:XXXXXXXX · record.json · timestamp

arxiv astro-ph/9907033 v1 submitted 1999-07-02 astro-ph

A.C. Fabian (1) , A. Celotti (2 , 1) , G. Pooley (3) , K. Iwasawa (1) , W.N. Brandt (4) , R.G. McMahon (1) , M.D. Hoenig (1) ((1) IOA

show 10 more authors

Cambridge UK (2) S.I.S.S.A. Trieste Italy (3) Cavendish Laboratories (4) Dep. Astronomy Astrophysics University Park USA)

This is my paper · ORCID

classification astro-ph

keywords blazarextremenearbyvariabilityalreadybandbillionblack

0 comments

read the original abstract

We report X-ray and radio variability of GB 1428+4217 which confirm its blazar nature. IR observations reveal a powerful optical-UV component, not obscured by dust, which is suggestive of the presence of a billion solar mass black hole, already formed by z ~ 5. A detailed comparison of the broad band spectral properties of GB 1428+4217 with those of nearby blazars shows it to be extreme, but nevertheless consistent with the trend found for nearby sources.

Discussion (0). Continue with ORCID to comment.

Pith tools