Pith Number

pith:NYRB3OCG

pith:2009:NYRB3OCGBTGJJELY6BQ3AR26IG

not attested not anchored not stored refs pending

The properties of quasar hosts at the peak of the quasar activity

A. Treves, J.K. Kotilainen, M. Uslenghi, R. Decarli, R. Falomo, R. Scarpa

arxiv:0908.0204 v1 · 2009-08-03 · 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{NYRB3OCGBTGJJELY6BQ3AR26IG}

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	2026-05-18T02:12:45.308242Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6e221db8460ccc949178f061b0475e41a6fdf484265b49720473d8f9d60bc1ec

Aliases

arxiv: 0908.0204 · arxiv_version: 0908.0204v1 · doi: 10.48550/arxiv.0908.0204 · pith_short_12: NYRB3OCGBTGJ · pith_short_16: NYRB3OCGBTGJJELY · pith_short_8: NYRB3OCG

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/NYRB3OCGBTGJJELY6BQ3AR26IG \
  | 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: 6e221db8460ccc949178f061b0475e41a6fdf484265b49720473d8f9d60bc1ec

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f4cc3a885eadb6aecdce0f6b1d6ba1cdbff9c2e22ccb3199ba98843674ee0d6d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-08-03T08:57:53Z",
    "title_canon_sha256": "d979f3c7a0859b406d4e183d35f72d68649f6d9c12cf62e0a16b0f7bd20a6773"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.0204",
    "kind": "arxiv",
    "version": 1
  }
}