Pith Number

pith:66WQKXMP

pith:2019:66WQKXMPSMHS3XNK2L64UQ52CE

not attested not anchored not stored refs pending

The survey of Planetary Nebulae in Andromeda (M31) II. Age-velocity dispersion relation in the disc from Planetary Nebulae

Alan McConnachie, Claudia Pulsoni, Johanna Hartke, Kenneth C. Freeman, Magda Arnaboldi, Mat\'ias Bla\~na, Nelson Caldwell, Ortwin Gerhard, Puragra Guhathakurta, Souradeep Bhattacharya

arxiv:1909.09724 v1 · 2019-09-20 · 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{66WQKXMPSMHS3XNK2L64UQ52CE}

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	2026-07-05T00:14:15.979486Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f7ad055d8f930f2dddaad2fdca43ba1117ee5bede8a9a4de6ff24a79e38a356b

Aliases

arxiv: 1909.09724 · arxiv_version: 1909.09724v1 · doi: 10.48550/arxiv.1909.09724 · pith_short_12: 66WQKXMPSMHS · pith_short_16: 66WQKXMPSMHS3XNK · pith_short_8: 66WQKXMP

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/66WQKXMPSMHS3XNK2L64UQ52CE \
  | 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: f7ad055d8f930f2dddaad2fdca43ba1117ee5bede8a9a4de6ff24a79e38a356b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bba117576162b90bf6f111953cea7215b95886a8d89df2d3c573e53067f70278",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-09-20T21:31:12Z",
    "title_canon_sha256": "2c7be25b46b857245240598cb33815c2eaa8bdc04ca2195813a7fc130bf9f5d3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1909.09724",
    "kind": "arxiv",
    "version": 1
  }
}