Pith Number

pith:TRBTKZQJ

pith:2009:TRBTKZQJ5D56B7O5MLRZ3KXM4F

not attested not anchored not stored refs pending

Deep multi-frequency radio imaging in the Lockman Hole using the GMRT and VLA: I. The nature of the sub-mJy radio population

A. D. Biggs, D. A. Green, D. V. Lal, Edo Ibar (Edinburgh), P. N. Best, R. J. Ivison

arxiv:0903.3600 v1 · 2009-03-20 · 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{TRBTKZQJ5D56B7O5MLRZ3KXM4F}

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	2026-05-18T02:14:26.892939Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9c43356609e8fbe0fddd62e39daaece16cfb2c63f67be9770f1bdcdcbf81d90d

Aliases

arxiv: 0903.3600 · arxiv_version: 0903.3600v1 · doi: 10.48550/arxiv.0903.3600 · pith_short_12: TRBTKZQJ5D56 · pith_short_16: TRBTKZQJ5D56B7O5 · pith_short_8: TRBTKZQJ

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/TRBTKZQJ5D56B7O5MLRZ3KXM4F \
  | 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: 9c43356609e8fbe0fddd62e39daaece16cfb2c63f67be9770f1bdcdcbf81d90d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "745e854b41aabc2cd1218578bd3de54d429103ea47e4c6114109b70b7d182a6c",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-03-20T21:30:36Z",
    "title_canon_sha256": "180cb3bac7d3173ad54e6ec8e0179df21737ef4e2d1d52a3bdbda289d19e0b32"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.3600",
    "kind": "arxiv",
    "version": 1
  }
}