Pith Number

pith:SJF7IMYH

pith:2013:SJF7IMYHEZXNQX7NF3YJEGPRAY

not attested not anchored not stored refs pending

SALT long-slit spectroscopy of LBQS 2113-4538: variability of the Mg II and Fe II component

A. Swieton, A. Udalski, B. Czerny, J. Kaluzny, K. Hryniewicz, M. Krupa, W. Pych

arxiv:1308.3980 v2 · 2013-08-19 · astro-ph.CO · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SJF7IMYHEZXNQX7NF3YJEGPRAY}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T01:48:14.075356Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

924bf43307266ed85fed2ef09219f1060ab463a8032525592e555a98a4c33803

Aliases

arxiv: 1308.3980 · arxiv_version: 1308.3980v2 · doi: 10.48550/arxiv.1308.3980 · pith_short_12: SJF7IMYHEZXN · pith_short_16: SJF7IMYHEZXNQX7N · pith_short_8: SJF7IMYH

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/SJF7IMYHEZXNQX7NF3YJEGPRAY \
  | 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: 924bf43307266ed85fed2ef09219f1060ab463a8032525592e555a98a4c33803

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "87da705e1fe07abd89d850efb9eba8b195da1e154e73bf2ab26d3b438d37ca2a",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-08-19T11:02:30Z",
    "title_canon_sha256": "d22f6b016d6922cad09200247e16507a4f3366c36d8498a9228fe36b266e41f1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1308.3980",
    "kind": "arxiv",
    "version": 2
  }
}