Pith Number

pith:2V4O7G5W

pith:2009:2V4O7G5WX3NVVVAYJVF3FWKBSZ

not attested not anchored not stored refs pending

Potential of Radiotelescopes for Atmospheric Line Observations: I. Observation Principles and Transmission Curves for Selected Sites

(2) Chalmers University of Technology, (3) National Institute of Information, Communication Technology), Joachim Urban (2), Nicola Schneider (1), Philippe Baron (3) ((1) IRFU/SAp CEA Saclay

arxiv:0902.1642 v3 · 2009-02-10 · astro-ph.EP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2V4O7G5WX3NVVVAYJVF3FWKBSZ}

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	2026-05-17T23:50:07.771182Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d578ef9bb6bedb5ad4184d4bb2d941964293e2264dda609086d821e949cdf887

Aliases

arxiv: 0902.1642 · arxiv_version: 0902.1642v3 · doi: 10.48550/arxiv.0902.1642 · pith_short_12: 2V4O7G5WX3NV · pith_short_16: 2V4O7G5WX3NVVVAY · pith_short_8: 2V4O7G5W

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/2V4O7G5WX3NVVVAYJVF3FWKBSZ \
  | 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: d578ef9bb6bedb5ad4184d4bb2d941964293e2264dda609086d821e949cdf887

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "68a59bef6f62987a773d3b2d79582e0b26daabd866e3316ed28c3e987c8139ac",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2009-02-10T12:48:58Z",
    "title_canon_sha256": "eb7e387044f9349a96359348a4fd73a27c4e85dc012761000ada78b7c46f038e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0902.1642",
    "kind": "arxiv",
    "version": 3
  }
}