Pith Number

pith:XZL2FKES

pith:2004:XZL2FKES2YER6LKQLWYXRRLZDQ

not attested not anchored not stored refs pending

Unconventional AGN from the SDSS

D. A. Vanden Berk, D. G. York, D. P. Schneider, G. R. Knapp, G. T. Richards, J. Brinkmann, K. S. J. Anderson, M. A. Strauss, Patrick B. Hall (Princeton), S. A. Snedden, S. F. Anderson

arxiv:astro-ph/0403347 v1 · 2004-03-15 · 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{XZL2FKES2YER6LKQLWYXRRLZDQ}

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	2026-05-18T00:37:17.497021Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

be57a2a892d6091f2d505db178c5791c3055cde930bbdc43ebc1da59c69c7cb7

Aliases

arxiv: astro-ph/0403347 · arxiv_version: astro-ph/0403347v1 · doi: 10.48550/arxiv.astro-ph/0403347 · pith_short_12: XZL2FKES2YER · pith_short_16: XZL2FKES2YER6LKQ · pith_short_8: XZL2FKES

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/XZL2FKES2YER6LKQLWYXRRLZDQ \
  | 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: be57a2a892d6091f2d505db178c5791c3055cde930bbdc43ebc1da59c69c7cb7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0c5c30ddec108694a1057edbacabf189ad40bebc8fd27c2d8e4087787fe46bd7",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-03-15T17:50:37Z",
    "title_canon_sha256": "90e615ef4a6bee92879ee5189c9527f49ad37778da437de18503321cb36e32ce"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0403347",
    "kind": "arxiv",
    "version": 1
  }
}