Pith Number

pith:SP2SRFAL

pith:2019:SP2SRFALP3HBUCXDQDAH6R4J3Z

not attested not anchored not stored refs pending

Semi-empirical metallicity calibrations based on ultraviolet emission lines of type-2 AGNs

A. C. Krabbe, A. F.Monteiro, G. F. Hagele, M. V. Cardaci, O. L. Dors

arxiv:1905.00691 v1 · 2019-05-02 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SP2SRFALP3HBUCXDQDAH6R4J3Z}

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	2026-05-17T23:46:17.547218Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

93f528940b7ece1a0ae380c07f4789de78c14dc28466dfcdeb8e25208463b51d

Aliases

arxiv: 1905.00691 · arxiv_version: 1905.00691v1 · doi: 10.48550/arxiv.1905.00691 · pith_short_12: SP2SRFALP3HB · pith_short_16: SP2SRFALP3HBUCXD · pith_short_8: SP2SRFAL

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/SP2SRFALP3HBUCXDQDAH6R4J3Z \
  | 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: 93f528940b7ece1a0ae380c07f4789de78c14dc28466dfcdeb8e25208463b51d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "390374cbff1c293d9d760e3874dadd794a43feb7f3d7ad9970858d84b13ad76d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-05-02T12:15:36Z",
    "title_canon_sha256": "085d6e77cf98e0378553f72a06bbe09a178a6fbd0023473530385eafe995ae1b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.00691",
    "kind": "arxiv",
    "version": 1
  }
}