Pith Number

pith:APCSEPOZ

pith:2009:APCSEPOZOI2BW56JSWF6D4CJM5

not attested not anchored not stored refs pending

First Results from the Swarms Survey. SDSS 1257+5428: A Nearby, Massive White Dwarf Binary with a Likely Neutron Star or Black Hole Companion

Carles Badenes, Fergal Mullally, Robert H. Lupton, Susan E. Thompson

arxiv:0910.2709 v1 · 2009-10-14 · 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{APCSEPOZOI2BW56JSWF6D4CJM5}

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	2026-05-18T02:34:18.785801Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

03c5223dd972341b77c9958be1f0496778ec2db82c2e6c6ab5e6e928c997ac93

Aliases

arxiv: 0910.2709 · arxiv_version: 0910.2709v1 · doi: 10.48550/arxiv.0910.2709 · pith_short_12: APCSEPOZOI2B · pith_short_16: APCSEPOZOI2BW56J · pith_short_8: APCSEPOZ

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/APCSEPOZOI2BW56JSWF6D4CJM5 \
  | 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: 03c5223dd972341b77c9958be1f0496778ec2db82c2e6c6ab5e6e928c997ac93

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7184ce4e558db69822091a7631f1bf59af3b47cf3e4db2d11c09971d3606092e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-10-14T20:00:26Z",
    "title_canon_sha256": "403af5cd9517111c11765bbe843b4d860d560d835e0faa37e457823642884061"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0910.2709",
    "kind": "arxiv",
    "version": 1
  }
}