Pith Number

pith:3UHJGCQ4

pith:2016:3UHJGCQ47II6O5Q7V36M3B3W2J

not attested not anchored not stored refs pending

A Search for Mass Loss on the Cepheid Instability Strip using HI 21-cm Line Observations

L. D. Matthews (MIT Haystack Observatory), M. Marengo (Iowa State University), N. R. Evans (Harvard-Smithsonian Center for Astrophysics)

arxiv:1609.06611 v1 · 2016-09-21 · astro-ph.SR · 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{3UHJGCQ47II6O5Q7V36M3B3W2J}

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	2026-05-18T00:55:11.729333Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dd0e930a1cfa11e7761faefccd8776d24dbbaf7eb8e8dafd87dfda918af0ef9b

Aliases

arxiv: 1609.06611 · arxiv_version: 1609.06611v1 · doi: 10.48550/arxiv.1609.06611 · pith_short_12: 3UHJGCQ47II6 · pith_short_16: 3UHJGCQ47II6O5Q7 · pith_short_8: 3UHJGCQ4

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/3UHJGCQ47II6O5Q7V36M3B3W2J \
  | 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: dd0e930a1cfa11e7761faefccd8776d24dbbaf7eb8e8dafd87dfda918af0ef9b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "62e0bac537585cf4010952b8a5563f091ea64dcc32e82731ea78b99d574719f5",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2016-09-21T15:59:22Z",
    "title_canon_sha256": "8d5ac5e6ebf696fdeef205fd69f65748e23b78f0e7cdd0f0002ee8e646907b99"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1609.06611",
    "kind": "arxiv",
    "version": 1
  }
}