Pith Number

pith:YFTTHUE4

pith:2009:YFTTHUE4W26744K2R4T4BOBJVA

not attested not anchored not stored refs pending

Follow-up Observations of the Second and Third Known Pulsating Hot DQ White Dwarfs

E.M. Green, G. Fontaine, M. Francoeur, M. Latour, P. Brassard, P. Dufour

arxiv:0907.4293 v1 · 2009-07-24 · astro-ph.SR

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YFTTHUE4W26744K2R4T4BOBJVA}

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	2026-05-18T02:12:53.871440Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c16733d09cb6bdfe715a8f27c0b829a82d2730139950198f8234421c7ec20e30

Aliases

arxiv: 0907.4293 · arxiv_version: 0907.4293v1 · doi: 10.48550/arxiv.0907.4293 · pith_short_12: YFTTHUE4W267 · pith_short_16: YFTTHUE4W26744K2 · pith_short_8: YFTTHUE4

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/YFTTHUE4W26744K2R4T4BOBJVA \
  | 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: c16733d09cb6bdfe715a8f27c0b829a82d2730139950198f8234421c7ec20e30

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "28f017daf03d3b4cdd3ef6fea91757fc2dcf58509e3bc78a936e073a5e22b8f1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-07-24T14:15:30Z",
    "title_canon_sha256": "ff50d69954947cc72e5bb5a6567da7033b2e1fbff6e8550f1e9e6ace465a7a8b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.4293",
    "kind": "arxiv",
    "version": 1
  }
}