Pith Number

pith:YU7UBQLF

pith:2009:YU7UBQLFNSZSKF3BEYVKQ2VKWA

not attested not anchored not stored refs pending

The Abundance Inhomogeneity in the Northern Rim of the Cygnus Loop

Hiroaki Takahashi, Hiroko Kosugi, Hiroshi Tsunemi, Hiroyuki Uchida, Masashi Kimura, Satoru Katsuda

arxiv:0901.3430 v1 · 2009-01-22 · 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{YU7UBQLFNSZSKF3BEYVKQ2VKWA}

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	2026-05-18T02:14:56.297854Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c53f40c1656cb3251761262aa86aaab014fee258752cb33682bacb741d513de8

Aliases

arxiv: 0901.3430 · arxiv_version: 0901.3430v1 · doi: 10.48550/arxiv.0901.3430 · pith_short_12: YU7UBQLFNSZS · pith_short_16: YU7UBQLFNSZSKF3B · pith_short_8: YU7UBQLF

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/YU7UBQLFNSZSKF3BEYVKQ2VKWA \
  | 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: c53f40c1656cb3251761262aa86aaab014fee258752cb33682bacb741d513de8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8aec41d8467bb86d86ecdc828e7347e4be7e30c2e0b12f014f49febb991c56cc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-01-22T08:30:31Z",
    "title_canon_sha256": "a9bb67c8f1994b5bc87f886c76366ca23acba92c0e50571469b989331b0922b8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.3430",
    "kind": "arxiv",
    "version": 1
  }
}