Pith Number

pith:RDU2JUX2

pith:2011:RDU2JUX2BAJ55J5DE2SUOG5ANI

not attested not anchored not stored refs pending

Spectroscopy of Very Low Mass Stars and Brown Dwarfs in the Lambda Orionis Star Forming Region. I. Enlarging the census down to the planetary mass domain in Collinder 69

A. Bayo, B. Stelzer, C. Melo, D. Barrado, H. Bouy, J. Stauffer, M. Morales-Calderon, M. Tamura, N. Huelamo, R. Jayawardhana

arxiv:1109.4917 v1 · 2011-09-22 · astro-ph.SR · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{RDU2JUX2BAJ55J5DE2SUOG5ANI}

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	2026-05-18T02:00:26.392968Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

88e9a4d2fa0813dea7a326a5471ba06a22a1d26a54abf9dd4bc0a70a9c2556fa

Aliases

arxiv: 1109.4917 · arxiv_version: 1109.4917v1 · doi: 10.48550/arxiv.1109.4917 · pith_short_12: RDU2JUX2BAJ5 · pith_short_16: RDU2JUX2BAJ55J5D · pith_short_8: RDU2JUX2

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/RDU2JUX2BAJ55J5DE2SUOG5ANI \
  | 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: 88e9a4d2fa0813dea7a326a5471ba06a22a1d26a54abf9dd4bc0a70a9c2556fa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "af838e164e44bd4357fa4a2df32a7f3e6b2d055c64f6ef453993ed912d330a41",
    "cross_cats_sorted": [
      "astro-ph.IM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2011-09-22T18:57:43Z",
    "title_canon_sha256": "7a281c9ee6c8d5dd0545ab8829439b2087c85cd71dbf1ac131400f9840df34f4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.4917",
    "kind": "arxiv",
    "version": 1
  }
}