Pith Number

pith:NYUSK76W

pith:2007:NYUSK76WS7RZLGNIBDZF7372BN

not attested not anchored not stored refs pending

A deep Chandra, VLA and Spitzer IRAC study of the very low luminosity nucleus of the elliptical NGC821

3), A. Baldi (2), A. Siemiginowska (2), Bologna University, Cambridge, D.W. Kim (2) ((1) Astronomy Dept., G. Fabbiano (2), Italy; (2) Harvard-Smithsonian Center for Astrophysics, L. Greenhill (2), MA (USA); (3) Mullard Space Science Laboratory, M. Elvis (2), R. Soria (2, S. Pellegrini (1), UK), University College London

arxiv:astro-ph/0701642 v2 · 2007-01-23 · 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{NYUSK76WS7RZLGNIBDZF7372BN}

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	2026-05-18T01:40:27.066275Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6e29257fd697e39599a808f25feffa0b66e028b16d2a103f6198202dc6d1ae54

Aliases

arxiv: astro-ph/0701642 · arxiv_version: astro-ph/0701642v2 · doi: 10.48550/arxiv.astro-ph/0701642 · pith_short_12: NYUSK76WS7RZ · pith_short_16: NYUSK76WS7RZLGNI · pith_short_8: NYUSK76W

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/NYUSK76WS7RZLGNIBDZF7372BN \
  | 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: 6e29257fd697e39599a808f25feffa0b66e028b16d2a103f6198202dc6d1ae54

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bc58c3f8040bfc3052557b3177527d8fe969226bf3bed1de01076be35b39e485",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2007-01-23T10:54:12Z",
    "title_canon_sha256": "091a4da6a14005666682a969cfce36c81b09fadd187dae66fcc4d9974ed9b2ba"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0701642",
    "kind": "arxiv",
    "version": 2
  }
}