Pith Number

pith:OTAP4K2P

pith:2010:OTAP4K2PJNZ7HG4NYYIW23WI4G

not attested not anchored not stored refs pending

Exploring the Spectral Space of Low Redshift QSOs

Todd A. Boroson, Tod R. Lauer

arxiv:1005.0028 v2 · 2010-04-30 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OTAP4K2PJNZ7HG4NYYIW23WI4G}

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	2026-05-18T02:07:44.185007Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

74c0fe2b4f4b73f39b8dc6116d6ec8e1a200a068a2150243979af2af20aa32a7

Aliases

arxiv: 1005.0028 · arxiv_version: 1005.0028v2 · doi: 10.48550/arxiv.1005.0028 · pith_short_12: OTAP4K2PJNZ7 · pith_short_16: OTAP4K2PJNZ7HG4N · pith_short_8: OTAP4K2P

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/OTAP4K2PJNZ7HG4NYYIW23WI4G \
  | 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: 74c0fe2b4f4b73f39b8dc6116d6ec8e1a200a068a2150243979af2af20aa32a7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "07cdcaf327fc9152810a246dabec81e240375157d0c5d8fd54f227f884f5f904",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2010-04-30T22:03:59Z",
    "title_canon_sha256": "e55c6eefa75589be5123febb00100a7fb2e4cc928f931380bc518a92d4fe55b1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1005.0028",
    "kind": "arxiv",
    "version": 2
  }
}