Pith Number

pith:7NAC6FN4

pith:2000:7NAC6FN4XT4MMAX3PETLKGVYQ2

not attested not anchored not stored refs pending

A NICMOS imaging study of high-z quasar host galaxies

(2) University of Oxford, (3) Space Telescope Science Institute), C. P. O'Dea (3) ((1) University of Edinburgh, J. S. Dunlop (1), L. Miller (2), M. J. Kukula (1), R. J. McLure (2), S. A. Baum (3), W. J. Percival (1)

arxiv:astro-ph/0010007 v2 · 2000-09-30 · 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{7NAC6FN4XT4MMAX3PETLKGVYQ2}

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	2026-05-18T01:22:59.071716Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fb402f15bcbcf8c602fb7926b51ab8868b17ba0a957451a674d4aa9272696f3c

Aliases

arxiv: astro-ph/0010007 · arxiv_version: astro-ph/0010007v2 · doi: 10.48550/arxiv.astro-ph/0010007 · pith_short_12: 7NAC6FN4XT4M · pith_short_16: 7NAC6FN4XT4MMAX3 · pith_short_8: 7NAC6FN4

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/7NAC6FN4XT4MMAX3PETLKGVYQ2 \
  | 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: fb402f15bcbcf8c602fb7926b51ab8868b17ba0a957451a674d4aa9272696f3c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b700f0bc7e6ff65f1c9f9fbae7d544ec1b326d02e148f7da9b6f894d25b043b7",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2000-09-30T14:24:03Z",
    "title_canon_sha256": "e081090ef425e8c4f0e11b729965c8b7bc56dbc0724b9afd07b92a2539c80240"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0010007",
    "kind": "arxiv",
    "version": 2
  }
}