Pith Number

pith:TDWY7UDW

pith:2010:TDWY7UDW2H72LML5MBQPHJWKCZ

not attested not anchored not stored refs pending

Measurement of a Metallicity Gradient in a z=2 Galaxy: Implications for Inside-Out Assembly Histories

Eric Jullo, Johan Richard, Richard S. Ellis, Tucker Jones

arxiv:1010.1538 v1 · 2010-10-07 · 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{TDWY7UDW2H72LML5MBQPHJWKCZ}

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	2026-05-18T02:05:07.887097Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

98ed8fd076d1ffa5b17d6060f3a6ca1679855ff247b1909aaa0e372a99d1111c

Aliases

arxiv: 1010.1538 · arxiv_version: 1010.1538v1 · doi: 10.48550/arxiv.1010.1538 · pith_short_12: TDWY7UDW2H72 · pith_short_16: TDWY7UDW2H72LML5 · pith_short_8: TDWY7UDW

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/TDWY7UDW2H72LML5MBQPHJWKCZ \
  | 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: 98ed8fd076d1ffa5b17d6060f3a6ca1679855ff247b1909aaa0e372a99d1111c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a39b55569703b07d3162efc891aedaa7e8d32ac38413d2e7e59b15e1a34d5134",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2010-10-07T20:04:47Z",
    "title_canon_sha256": "1a79b7a29fe8cf8d8ab6bf6498911755c53f520cad79705702ce9fd6b88efa52"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1010.1538",
    "kind": "arxiv",
    "version": 1
  }
}