Pith Number

pith:XYEFUD2E

pith:2015:XYEFUD2EL42M5QSNZJBVUACUIB

not attested not anchored not stored refs pending

Spectral comparison between AGN at z = 0.1, 0.2 and 0.3

Hartmut Winkler, Jessica Tsuen

arxiv:1503.06985 v1 · 2015-03-24 · 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{XYEFUD2EL42M5QSNZJBVUACUIB}

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	2026-05-18T02:20:29.619483Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

be085a0f445f34cec24dca435a005440581bb2374409aa88f15ab85c179405bb

Aliases

arxiv: 1503.06985 · arxiv_version: 1503.06985v1 · doi: 10.48550/arxiv.1503.06985 · pith_short_12: XYEFUD2EL42M · pith_short_16: XYEFUD2EL42M5QSN · pith_short_8: XYEFUD2E

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/XYEFUD2EL42M5QSNZJBVUACUIB \
  | 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: be085a0f445f34cec24dca435a005440581bb2374409aa88f15ab85c179405bb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ddaa57684dc64b2adff14f9740e346f2f01046b356fe4b6b5e654359904fe9f0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2015-03-24T11:11:55Z",
    "title_canon_sha256": "14ae785b4b0f029e3ffa896e2116907c775519b44bb9e19fd87ef126b3e61ac0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.06985",
    "kind": "arxiv",
    "version": 1
  }
}