Pith Number

pith:Q3FX3C47

pith:2010:Q3FX3C477W42MMLZBARSEAGCBD

not attested not anchored not stored refs pending

The variability of optical \feii emission in PG QSO 1700+518

C. Hu (2), J.M. Wang (2) ((1) NJNU (2) IHEP), K. Huang (1), K.L. Huang (1), L. Zhang (1), Q.R. Yuan (1), W.H. Bian (1)

arxiv:1005.4728 v1 · 2010-05-26 · 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{Q3FX3C477W42MMLZBARSEAGCBD}

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	2026-05-18T02:07:08.074006Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

86cb7d8b9ffdb9a6317908232200c208f0f9974d96df604117897c891e6b687c

Aliases

arxiv: 1005.4728 · arxiv_version: 1005.4728v1 · doi: 10.48550/arxiv.1005.4728 · pith_short_12: Q3FX3C477W42 · pith_short_16: Q3FX3C477W42MMLZ · pith_short_8: Q3FX3C47

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/Q3FX3C477W42MMLZBARSEAGCBD \
  | 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: 86cb7d8b9ffdb9a6317908232200c208f0f9974d96df604117897c891e6b687c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f86d7950d145a78098185ad62c0e7de394ce93b9e58e85ae89fb588e04ed610b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2010-05-26T03:28:17Z",
    "title_canon_sha256": "3696359fed22e0a057a0b7a92df6aefe6be0e7f248aed57ecaf6a5ed8340e635"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1005.4728",
    "kind": "arxiv",
    "version": 1
  }
}