Pith Number

pith:BJ4F7C6Q

pith:2009:BJ4F7C6Q2JJ4BOSJK5DTVTHALU

not attested not anchored not stored refs pending

Unveiling the nature of M94's (NGC4736) outer region: a panchromatic perspective

David Martinez-Delgado, Ignacio Trujillo, Inma Martinez-Valpuesta, Jorge Penarrubia, Michael Pohlen, R. Jay Gabany

arxiv:0907.4884 v1 · 2009-07-28 · astro-ph.CO · 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{BJ4F7C6Q2JJ4BOSJK5DTVTHALU}

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	2026-05-18T02:12:47.133672Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0a785f8bd0d253c0ba4957473acce05d3c610e5a0c1ddd6714e96661d312ac5a

Aliases

arxiv: 0907.4884 · arxiv_version: 0907.4884v1 · doi: 10.48550/arxiv.0907.4884 · pith_short_12: BJ4F7C6Q2JJ4 · pith_short_16: BJ4F7C6Q2JJ4BOSJ · pith_short_8: BJ4F7C6Q

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/BJ4F7C6Q2JJ4BOSJK5DTVTHALU \
  | 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: 0a785f8bd0d253c0ba4957473acce05d3c610e5a0c1ddd6714e96661d312ac5a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "18c7a0a6e33e8f685d73af991e7c3172ebac67afe478dd27d49fc5a64ee79506",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-07-28T10:38:57Z",
    "title_canon_sha256": "c7147e526c5a7b1590095094037c69e13d86162784c021a365c23d5897d70935"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.4884",
    "kind": "arxiv",
    "version": 1
  }
}