Pith Number

pith:CYUD26Z7

pith:2013:CYUD26Z7CH6LVX45X6KEYU6QVC

not attested not anchored not stored refs pending

The effects of frequency-dependent quasar variability on the celestial reference frame

Christopher Watson, Jamie McCallum, Jay Blanchard, Jim Lovell, Jonathan Rogers, Oleg Titov, Stanislav Shabala

arxiv:1306.0696 v2 · 2013-06-04 · astro-ph.CO · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CYUD26Z7CH6LVX45X6KEYU6QVC}

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	2026-05-18T01:49:33.144057Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

16283d7b3f11fcbadf9dbf944c53d0a8ac749c0c3c2f51461e6986f3aa6b0437

Aliases

arxiv: 1306.0696 · arxiv_version: 1306.0696v2 · doi: 10.48550/arxiv.1306.0696 · pith_short_12: CYUD26Z7CH6L · pith_short_16: CYUD26Z7CH6LVX45 · pith_short_8: CYUD26Z7

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/CYUD26Z7CH6LVX45X6KEYU6QVC \
  | 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: 16283d7b3f11fcbadf9dbf944c53d0a8ac749c0c3c2f51461e6986f3aa6b0437

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dbdaa8dcaced7b1a978c09e1bce8f7d60d2fd647784b43ec36f6cf1c8697e892",
    "cross_cats_sorted": [
      "astro-ph.IM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-06-04T08:11:35Z",
    "title_canon_sha256": "b8ea48ec062ac12911f84818a5ed8f310f61d52bdc3e5abdf7fc5ee27a3de7ea"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1306.0696",
    "kind": "arxiv",
    "version": 2
  }
}