Pith Number

pith:HP2QMYGY

pith:2001:HP2QMYGY53XMWK37CWBJSS3SME

not attested not anchored not stored refs pending

The SDSS Imaging Pipelines

Gillian R. Knapp (Princeton University Observatory), James E. Gunn, Japan), Naoki Yasuda (National Astronomical Observatory, Robert Lupton, Stephen Kent (FNAL), Zeljko Ivezic

arxiv:astro-ph/0101420 v2 · 2001-01-23 · 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{HP2QMYGY53XMWK37CWBJSS3SME}

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.

Cited by

2 papers in Pith

Point spread function wavefront recovery from in-focus stellar observations

A Population of Little Red Dot-like Quasars in SDSS

Receipt and verification

First computed	2026-07-04T14:11:01.540541Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3bf50660d8eeeecb2b7f1582994b72612330039baa35a924aa1589774072c744

Aliases

arxiv: astro-ph/0101420 · arxiv_version: astro-ph/0101420v2 · doi: 10.48550/arxiv.astro-ph/0101420 · pith_short_12: HP2QMYGY53XM · pith_short_16: HP2QMYGY53XMWK37 · pith_short_8: HP2QMYGY

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/HP2QMYGY53XMWK37CWBJSS3SME \
  | 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: 3bf50660d8eeeecb2b7f1582994b72612330039baa35a924aa1589774072c744

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d052f5bf3ae1b5e8440ca80317f288848a2631b0a4e5ff450c1804eb131651de",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-01-23T20:44:18Z",
    "title_canon_sha256": "72cac77a503b72051c2064f1ad94b072ce4beb6cb4d5450eb5ab1356c6254e1a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0101420",
    "kind": "arxiv",
    "version": 2
  }
}