Pith Number

pith:5YUBBEY5

pith:2014:5YUBBEY5YMTVLHLSDSGDX27FEM

not attested not anchored not stored refs pending

Discovery of a red quasar with recurrent activity

D.J. Saikia, G. Gentile, H.C. Chandola, M. Baes, M. Patgiri, M. Singh, R. Joshi, R. Roy, S. Nandi

arxiv:1405.1869 v1 · 2014-05-08 · astro-ph.GA · astro-ph.CO · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5YUBBEY5YMTVLHLSDSGDX27FEM}

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	2026-05-18T01:43:16.363419Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ee2810931dc327559d721c8c3bebe523382a1f3e266b89b83827771ed22454cc

Aliases

arxiv: 1405.1869 · arxiv_version: 1405.1869v1 · doi: 10.48550/arxiv.1405.1869 · pith_short_12: 5YUBBEY5YMTV · pith_short_16: 5YUBBEY5YMTVLHLS · pith_short_8: 5YUBBEY5

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/5YUBBEY5YMTVLHLSDSGDX27FEM \
  | 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: ee2810931dc327559d721c8c3bebe523382a1f3e266b89b83827771ed22454cc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "82a829e932cdc5afa0ac15352c80c64214941591012d48bbf65f571c39e252fb",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2014-05-08T10:33:11Z",
    "title_canon_sha256": "e737b7931c726ae9a03352fd2a08afe303f0be8f683e71d6877a61cceba79b41"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1405.1869",
    "kind": "arxiv",
    "version": 1
  }
}