Pith Number

pith:DVEXW4Z2

pith:2005:DVEXW4Z23MEHE2LCFOMQUYV3WX

not attested not anchored not stored refs pending

Deep spectroscopy of a young radio source at z=0.521

A. C. S. Readhead, D. Lee, Garret Cotter, K. J. Inskip, T. J. Pearson

arxiv:astro-ph/0509128 v1 · 2005-09-06 · 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{DVEXW4Z23MEHE2LCFOMQUYV3WX}

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	2026-07-04T16:52:52.281239Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1d497b733adb087269622b990a62bbb5e574074af6ff32d18d2601dafa29e044

Aliases

arxiv: astro-ph/0509128 · arxiv_version: astro-ph/0509128v1 · doi: 10.48550/arxiv.astro-ph/0509128 · pith_short_12: DVEXW4Z23MEH · pith_short_16: DVEXW4Z23MEHE2LC · pith_short_8: DVEXW4Z2

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/DVEXW4Z23MEHE2LCFOMQUYV3WX \
  | 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: 1d497b733adb087269622b990a62bbb5e574074af6ff32d18d2601dafa29e044

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bb5c87d4bf718173a0657628ba0af5915ade90ea56999056985aa5da7fdcb756",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2005-09-06T14:26:01Z",
    "title_canon_sha256": "be46293a29011453575d597ae434c6b1b487e63a4771a64d4d8d4a6bb7874ed5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0509128",
    "kind": "arxiv",
    "version": 1
  }
}