Pith Number

pith:QRPR7EGC

pith:2014:QRPR7EGCGC4TH7Q4JRJRYWD5XB

not attested not anchored not stored refs pending

Prospects for measuring supermassive black hole masses with future extremely large telescopes

((1) Dunlap Institute, 2), (2) Department of Astronomy, (3) Department of Physics, (4) Herzberg Institute of Astrophysics, (5) Physics, (6) Caltech Optical Observatories, (7) TMT Observatory Corporation Instrumentation Department, 8), (8) Dunlap Fellow), Aaron J. Barth (3), Anna M. Moore (6), Astronomy, Astronomy Department, Astrophysics, Brent Ellerbroek (7), California Institute of Technology, Elizabeth J. Barton (3), Irvine, James E. Larkin (5), Lianqi Wang (7), Los Angeles, Luc Simard (4), Shelley A. Wright (1, Tuan Do (1, University of California, University of Toronto

arxiv:1401.7988 v1 · 2014-01-30 · astro-ph.GA · astro-ph.CO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QRPR7EGCGC4TH7Q4JRJRYWD5XB}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T01:44:54.319045Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

845f1f90c230b933fe1c4c531c587db87615cdbd74b44ede7c1d7e0125c763ec

Aliases

arxiv: 1401.7988 · arxiv_version: 1401.7988v1 · doi: 10.48550/arxiv.1401.7988 · pith_short_12: QRPR7EGCGC4T · pith_short_16: QRPR7EGCGC4TH7Q4 · pith_short_8: QRPR7EGC

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/QRPR7EGCGC4TH7Q4JRJRYWD5XB \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 845f1f90c230b933fe1c4c531c587db87615cdbd74b44ede7c1d7e0125c763ec

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "eb6f07833ef08314f916408b8c9969671d09d2fe7484da7d7b7307dd73bd06a9",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2014-01-30T21:00:05Z",
    "title_canon_sha256": "16e7078fa6778d0240514e25488a6c95c558e657451f8891e2ac15294502a385"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1401.7988",
    "kind": "arxiv",
    "version": 1
  }
}