Pith Number

pith:TGGPS5FJ

pith:2007:TGGPS5FJ4JL7LML6Y2UL7SAUJP

not attested not anchored not stored refs pending

An Inner Hole in the Disk around TW Hydrae Resolved in 7 Millimeter Dust Emission

A. M. Hughes, D. J. Wilner, M. J. Claussen, M. R. Hogerheijde, N. Calvet, P. D'Alessio

arxiv:0704.2422 v1 · 2007-04-18 · 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{TGGPS5FJ4JL7LML6Y2UL7SAUJP}

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	2026-07-04T15:44:15.194082Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

998cf974a9e257f5b17ec6a8bfc8144be1fca26de963e964433e65fdd70e1d93

Aliases

arxiv: 0704.2422 · arxiv_version: 0704.2422v1 · doi: 10.48550/arxiv.0704.2422 · pith_short_12: TGGPS5FJ4JL7 · pith_short_16: TGGPS5FJ4JL7LML6 · pith_short_8: TGGPS5FJ

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/TGGPS5FJ4JL7LML6Y2UL7SAUJP \
  | 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: 998cf974a9e257f5b17ec6a8bfc8144be1fca26de963e964433e65fdd70e1d93

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c4d1222493a5d5531bdd10ceb4ed1a7ef604b7c44f7e5f06d90377799efb80ff",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2007-04-18T20:13:02Z",
    "title_canon_sha256": "be47548dc0c48dfd1cb02278406b10203349512dd4c0dd413a7d2d3910368a38"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0704.2422",
    "kind": "arxiv",
    "version": 1
  }
}