Pith Number

pith:KEPPLPZ4

pith:2008:KEPPLPZ4BZNF4XGU7FSMDX6HMC

not attested not anchored not stored refs pending

Improved Neutron-Capture Element Abundances in Planetary Nebulae

(2) University of Texas at Austin, (3) Wesleyan University, (4) Advanced Light Source/LBNL, (5) University of Nevada-Reno, (6) Virginia Tech University, (7) Auburn University, (8) Queen's University Belfast), A. Aguilar (4), A. L. D. Kilcoyne (4), B. McLaughlin (8), C. P. Ballance (7), D. Esteves (5), H. L. Dinerstein (2), M. Bautista (6), M. C. Witthoeft (1), N. C. Sterling (1), P. H. Norrington (8) ((1) NASA Goddard Space Flight Center, R. C. Bilodeau (4), R. Phaneuf (5), S. Hwang (2), S. Redfield (3)

arxiv:0812.2221 v1 · 2008-12-11 · 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{KEPPLPZ4BZNF4XGU7FSMDX6HMC}

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	2026-05-18T04:32:20.497550Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

511ef5bf3c0e5a5e5cd4f964c1dfc7608ec3f403d88485f3e8dcdac56ca2339d

Aliases

arxiv: 0812.2221 · arxiv_version: 0812.2221v1 · doi: 10.48550/arxiv.0812.2221 · pith_short_12: KEPPLPZ4BZNF · pith_short_16: KEPPLPZ4BZNF4XGU · pith_short_8: KEPPLPZ4

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/KEPPLPZ4BZNF4XGU7FSMDX6HMC \
  | 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: 511ef5bf3c0e5a5e5cd4f964c1dfc7608ec3f403d88485f3e8dcdac56ca2339d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a73bd7d19f4c9c44774b7e485bf3a9f31b8a841878acbc76e998d9462b66523b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-12-11T19:45:55Z",
    "title_canon_sha256": "21bbd3156bb484cd53293352d1f063975bf077f79c325bdb262b538e1f6e3393"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0812.2221",
    "kind": "arxiv",
    "version": 1
  }
}