Pith Number

pith:TVQMJ4H2

pith:1999:TVQMJ4H2EZO4OO6RYUKPD7IR4B

not attested not anchored not stored refs pending

The Surface Density of Extremely Red Objects

B. von Kuhlmann, Ch. Leinert, C. Wolf, D. Thompson, E. Thommes, H. Hippelein, H.-J. R\"oser, J. Fried, J.-S. Huang, K. Meisenheimer, R. Fockenbrock, S. Phleps, S. V. W. Beckwith

arxiv:astro-ph/9907216 v2 · 1999-07-16 · 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{TVQMJ4H2EZO4OO6RYUKPD7IR4B}

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	2026-07-04T16:11:26.153089Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9d60c4f0fa265dc73bd1c514f1fd11e07bf44af18216aad5ec71f5254a384078

Aliases

arxiv: astro-ph/9907216 · arxiv_version: astro-ph/9907216v2 · doi: 10.48550/arxiv.astro-ph/9907216 · pith_short_12: TVQMJ4H2EZO4 · pith_short_16: TVQMJ4H2EZO4OO6R · pith_short_8: TVQMJ4H2

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/TVQMJ4H2EZO4OO6RYUKPD7IR4B \
  | 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: 9d60c4f0fa265dc73bd1c514f1fd11e07bf44af18216aad5ec71f5254a384078

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f6216098b2213a95c493cb8fb5381de72e36d95ab4ae54838f3c309139a5ea73",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-07-16T00:06:32Z",
    "title_canon_sha256": "55862b8956c7dcb8eac29fa18920a255920ab0a71acb018194f2bd1907c3ec7b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9907216",
    "kind": "arxiv",
    "version": 2
  }
}