Pith Number

pith:TU22F4UB

pith:2009:TU22F4UBM5A3NY4NWC2DLKY5VR

not attested not anchored not stored refs pending

Galaxy Zoo: A sample of blue early-type galaxies at low redshift

Alex Szalay, Anze Slosar, Chris Lintott, Dan Andreescu, Daniel Thomas, Jan vandenBerg, Kate Land, Kevin Schawinski, Marc Sarzi, M. Jordan Raddick, Phil Murray, Robert C. Nichol, Sadegh Khochfar, Steven P. Bamford, Sugata Kaviraj, Sukyoung K. Yi

arxiv:0903.3415 v1 · 2009-03-19 · astro-ph.CO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{TU22F4UBM5A3NY4NWC2DLKY5VR}

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	2026-05-18T02:14:27.197896Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9d35a2f2816741b6e38db0b435ab1dac40882e426b0942e47cee4be23af72734

Aliases

arxiv: 0903.3415 · arxiv_version: 0903.3415v1 · doi: 10.48550/arxiv.0903.3415 · pith_short_12: TU22F4UBM5A3 · pith_short_16: TU22F4UBM5A3NY4N · pith_short_8: TU22F4UB

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/TU22F4UBM5A3NY4NWC2DLKY5VR \
  | 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: 9d35a2f2816741b6e38db0b435ab1dac40882e426b0942e47cee4be23af72734

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4ec605be98e21ba3dee27d6087408463b205f98a091967cd3dfb126c018f8ceb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-03-19T20:22:15Z",
    "title_canon_sha256": "2e1cb0b86afeb2da94b4f9698762723f6957b5d1763794599ccbe7d39c0f9d82"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.3415",
    "kind": "arxiv",
    "version": 1
  }
}