Pith Number

pith:Y2SFXOC5

pith:2009:Y2SFXOC55VQEXKKBM4256TPRMB

not attested not anchored not stored refs pending

An Adaptive Optics Survey for Close Protostellar Binaries

Alan Tokunaga, Bo Reipurth, Michael Connelley

arxiv:0901.2138 v1 · 2009-01-14 · 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{Y2SFXOC55VQEXKKBM4256TPRMB}

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	2026-05-18T02:14:57.384621Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c6a45bb85ded604ba9416735df4df1607e5ff46ba9c569c7c2481ed4da91800a

Aliases

arxiv: 0901.2138 · arxiv_version: 0901.2138v1 · doi: 10.48550/arxiv.0901.2138 · pith_short_12: Y2SFXOC55VQE · pith_short_16: Y2SFXOC55VQEXKKB · pith_short_8: Y2SFXOC5

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/Y2SFXOC55VQEXKKBM4256TPRMB \
  | 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: c6a45bb85ded604ba9416735df4df1607e5ff46ba9c569c7c2481ed4da91800a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "20af0d91a9a0bb14ed0f0b0861a6fc17a1ba5490dd25ca3a1915a11899091263",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-01-14T22:59:04Z",
    "title_canon_sha256": "a4b3adfa535b136f00fcd68a6ac04acc1154002de7028e203170160711cc0cbb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.2138",
    "kind": "arxiv",
    "version": 1
  }
}