Pith Number

pith:GWOME4GU

pith:2009:GWOME4GUQJ7U5PEWT5PFFHIYNZ

not attested not anchored not stored refs pending

Helium Sedimentation and the UV Upturn in Brightest Cluster Galaxies

Daisuke Nagai (Yale), Fang Peng (Caltech)

arxiv:0910.0249 v2 · 2009-10-01 · 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{GWOME4GUQJ7U5PEWT5PFFHIYNZ}

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	2026-05-18T02:34:20.483591Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

359cc270d4827f4ebc969f5e529d186e4c6b959baeb351ed98f5bb2940b9e98c

Aliases

arxiv: 0910.0249 · arxiv_version: 0910.0249v2 · doi: 10.48550/arxiv.0910.0249 · pith_short_12: GWOME4GUQJ7U · pith_short_16: GWOME4GUQJ7U5PEW · pith_short_8: GWOME4GU

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/GWOME4GUQJ7U5PEWT5PFFHIYNZ \
  | 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: 359cc270d4827f4ebc969f5e529d186e4c6b959baeb351ed98f5bb2940b9e98c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "318253b24d6b4e5a3e1f8e1778e21acd22d3804afe5907244f7e1961ad7f2093",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-10-01T20:00:21Z",
    "title_canon_sha256": "dd5d178a13d713833a2d836595dbdba299f6e53ca1dbdcb0810d1db39457d51d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0910.0249",
    "kind": "arxiv",
    "version": 2
  }
}