Pith Number

pith:2UTAL6QO

pith:2009:2UTAL6QOSESWLKB7RC3CWCPGVK

not attested not anchored not stored refs pending

Foregrounds for observations of the cosmological 21 cm line: I. First Westerbork measurements of Galactic emission at 150 MHz in a low latitude field

A.G. de Bruyn, A. Offringa, B. Ciardi, G. Bernardi, G. Harker, J. Schaye, L.V.E. Koopmans, M.A. Brentjens, P. Labropoulos, R.M. Thomas, S. Yatawatta, S. Zaroubi, V. Jelic, V.N. Pandey

arxiv:0904.0404 v3 · 2009-04-02 · astro-ph.CO · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2UTAL6QOSESWLKB7RC3CWCPGVK}

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	2026-05-18T02:14:07.952009Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d52605fa0e912565a83f88b62b09e6aa9fcdbd04f87d87b75b1b444984e9ef76

Aliases

arxiv: 0904.0404 · arxiv_version: 0904.0404v3 · doi: 10.48550/arxiv.0904.0404 · pith_short_12: 2UTAL6QOSESW · pith_short_16: 2UTAL6QOSESWLKB7 · pith_short_8: 2UTAL6QO

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/2UTAL6QOSESWLKB7RC3CWCPGVK \
  | 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: d52605fa0e912565a83f88b62b09e6aa9fcdbd04f87d87b75b1b444984e9ef76

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "41c49ea60fa28559da80237a9e5673420b577dfad7ea7ce7b45d7bde5da09f82",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-04-02T15:07:21Z",
    "title_canon_sha256": "dbb4e5478b758a9bc9c4304794fccf15b7fa0a257ca6e5a89e1625fe0a5b587f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.0404",
    "kind": "arxiv",
    "version": 3
  }
}