Pith Number

pith:A3UEMJLG

pith:2009:A3UEMJLGPHAROVBVP3XROLGNEL

not attested not anchored not stored refs pending

An Infrared Comparison of Type-1 and Type-2 Quasars

(2) Spitzer Science Center, (3) Haverford College, (4) NOAO/CTIO), Anna Sajina (3), Gabriela Canalizo (1), Kyle D. Hiner (1), Lee Armus (2), Lisa Storrie-Lombardi (2) ((1) UC Riverside, Mark Lacy (2), Susan Ridgway (4)

arxiv:0910.1363 v1 · 2009-10-07 · 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{A3UEMJLGPHAROVBVP3XROLGNEL}

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	2026-05-18T02:34:19.737282Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

06e846256679c11754357eef172ccd22c7ff9d9c760a13198ec4f22b498ab62e

Aliases

arxiv: 0910.1363 · arxiv_version: 0910.1363v1 · doi: 10.48550/arxiv.0910.1363 · pith_short_12: A3UEMJLGPHAR · pith_short_16: A3UEMJLGPHAROVBV · pith_short_8: A3UEMJLG

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/A3UEMJLGPHAROVBVP3XROLGNEL \
  | 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: 06e846256679c11754357eef172ccd22c7ff9d9c760a13198ec4f22b498ab62e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e8c2d66df9f1666951889a2993ce32f8f2df472ae8300bee21b542b7d7330d89",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-10-07T20:34:55Z",
    "title_canon_sha256": "3f9c3d5914f549c6f7ce9c9c259e23341852fcad3173144c65a604af6e083a5b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0910.1363",
    "kind": "arxiv",
    "version": 1
  }
}