Pith Number

pith:UW4ST2PK

pith:2009:UW4ST2PKWFTBYOWX4BGKYJV4NI

not attested not anchored not stored refs pending

X-ray and Infrared Observations of Two Externally-Polluted White Dwarfs

B. Zuckerman (UCLA), J. Farihi (Leicester), M. Jura (UCLA), M. P. Muno (Caltech)

arxiv:0905.0117 v1 · 2009-05-01 · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UW4ST2PKWFTBYOWX4BGKYJV4NI}

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

1 paper in Pith

White dwarfs within 13 pc: Insights from ultraviolet spectroscopy

Receipt and verification

First computed	2026-07-04T15:46:28.028460Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a5b929e9eab1661c3ad7e04cac26bc6a141c31fc3c007e50407a3db2455ec5af

Aliases

arxiv: 0905.0117 · arxiv_version: 0905.0117v1 · doi: 10.48550/arxiv.0905.0117 · pith_short_12: UW4ST2PKWFTB · pith_short_16: UW4ST2PKWFTBYOWX · pith_short_8: UW4ST2PK

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/UW4ST2PKWFTBYOWX4BGKYJV4NI \
  | 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: a5b929e9eab1661c3ad7e04cac26bc6a141c31fc3c007e50407a3db2455ec5af

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ec77f6cd2029b918e7036ece393f3aec79578c1ac0b4421952c8c0d93d77d055",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-05-01T16:48:29Z",
    "title_canon_sha256": "a72570da8f9b9f7c9d47cb47bc9453b2127a03d64635711cfceb29acd2117a60"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.0117",
    "kind": "arxiv",
    "version": 1
  }
}