Pith Number

pith:NPTBLDQ6

pith:2007:NPTBLDQ6SFBRANFAAW5K5RRKYF

not attested not anchored not stored refs pending

Spitzer Space Telescope study of disks in the young $\sigma$ Orionis cluster

A. K. Vivas, C. Briceno, E. Young, G. Fazio, Jesus Hernandez, J. Muzerolle, J. Stauffer, L. Allen, L. Hartmann, N. Calvet, R. Gutermuth, T. Megeath

arxiv:astro-ph/0701476 v1 · 2007-01-16 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NPTBLDQ6SFBRANFAAW5K5RRKYF}

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	2026-05-18T04:29:07.181700Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6be6158e1e91431034a005baaec62ac17f6e8a536dae8ddc778fc33af11d7bbe

Aliases

arxiv: astro-ph/0701476 · arxiv_version: astro-ph/0701476v1 · doi: 10.48550/arxiv.astro-ph/0701476 · pith_short_12: NPTBLDQ6SFBR · pith_short_16: NPTBLDQ6SFBRANFA · pith_short_8: NPTBLDQ6

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/NPTBLDQ6SFBRANFAAW5K5RRKYF \
  | 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: 6be6158e1e91431034a005baaec62ac17f6e8a536dae8ddc778fc33af11d7bbe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ae94040a577ee352bb53a55e07473fb8ead183d299cce5b55474d0c2ffcfa861",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2007-01-16T19:30:08Z",
    "title_canon_sha256": "272623a23e8ac88052b215d0d2804e2552fcb35f58010ee7dd07eccf0866d9a2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0701476",
    "kind": "arxiv",
    "version": 1
  }
}