Pith Number

pith:YYIQJIBI

pith:2013:YYIQJIBIXUNOKB6EIDV2ZMBDAZ

not attested not anchored not stored refs pending

The precision of line position measurements of unresolved quasar absorption lines and its influence on the search for variations of fundamental constants

Dieter Reimers, Nils Prause

arxiv:1305.6178 v2 · 2013-05-27 · 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{YYIQJIBIXUNOKB6EIDV2ZMBDAZ}

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	2026-05-18T01:49:41.199923Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c61104a028bd1ae507c440ebacb023066991d818fed056a70a0de1f726dbe6bb

Aliases

arxiv: 1305.6178 · arxiv_version: 1305.6178v2 · doi: 10.48550/arxiv.1305.6178 · pith_short_12: YYIQJIBIXUNO · pith_short_16: YYIQJIBIXUNOKB6E · pith_short_8: YYIQJIBI

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/YYIQJIBIXUNOKB6EIDV2ZMBDAZ \
  | 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: c61104a028bd1ae507c440ebacb023066991d818fed056a70a0de1f726dbe6bb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9161abbc95fdfec4b926fcd1f0df064105e214bb8678e207f4c6062c23c6fbfc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-05-27T11:17:23Z",
    "title_canon_sha256": "a838c811e8c05c51c4d5e9b13f7fc178d1c2545c30f100ce7d24b9af5c520306"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.6178",
    "kind": "arxiv",
    "version": 2
  }
}