Pith Number

pith:6C5AG5KC

pith:2009:6C5AG5KCEHJN56CIVBY5F5NUHY

not attested not anchored not stored refs pending

1.6 GHz VLBI Observations of SN 1979C: almost-free expansion

A. Alberdi, E. Ros, I. Marti-Vidal, J.C. Guirado, J.M. Marcaide, K.W. Weiler, M.A. Perez-Torres

arxiv:0907.0780 v2 · 2009-07-06 · astro-ph.HE · 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{6C5AG5KCEHJN56CIVBY5F5NUHY}

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	2026-05-18T02:13:05.275250Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f0ba03754221d2def848a871d2f5b43e3e37e0d7068905c8568ed9ddc60ea583

Aliases

arxiv: 0907.0780 · arxiv_version: 0907.0780v2 · doi: 10.48550/arxiv.0907.0780 · pith_short_12: 6C5AG5KCEHJN · pith_short_16: 6C5AG5KCEHJN56CI · pith_short_8: 6C5AG5KC

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/6C5AG5KCEHJN56CIVBY5F5NUHY \
  | 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: f0ba03754221d2def848a871d2f5b43e3e37e0d7068905c8568ed9ddc60ea583

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "60505487468259e24c20c617dca291e5fb53247ca9f80a22383378de34001d4d",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-07-06T19:11:01Z",
    "title_canon_sha256": "240a0ea85fb32e7b76832dd62e65787c6c16a5bcf33a6fb016068822679448f5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.0780",
    "kind": "arxiv",
    "version": 2
  }
}