Pith Number

pith:52EAIQVJ

pith:2021:52EAIQVJWYYA6ORWBPQTGHHPDF

not attested not anchored not stored refs pending

The complex variability of blazars: Time-scales and periodicity analysis in S4 0954+65

A. P. Marscher, C. M. Raiteri, M. Villata, S. G. Jorstad, V. M. Larionov, Z. R. Weaver (for the WEBT Collaboration)

arxiv:2104.15005 v1 · 2021-04-30 · astro-ph.HE · 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{52EAIQVJWYYA6ORWBPQTGHHPDF}

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	2026-07-05T02:39:20.393034Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ee880442a9b6300f3a360be1331cef19619befec5cfbea70b73d281aaa0a6d0d

Aliases

arxiv: 2104.15005 · arxiv_version: 2104.15005v1 · doi: 10.48550/arxiv.2104.15005 · pith_short_12: 52EAIQVJWYYA · pith_short_16: 52EAIQVJWYYA6ORW · pith_short_8: 52EAIQVJ

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/52EAIQVJWYYA6ORWBPQTGHHPDF \
  | 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: ee880442a9b6300f3a360be1331cef19619befec5cfbea70b73d281aaa0a6d0d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "49f55ee7389c975c1adb6ff31d44415fc939d8def28a56ba69328d8af3b967c1",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2021-04-30T13:55:45Z",
    "title_canon_sha256": "be4b1078e820ab50c73f8128b90a53f23acc7b3beac44b908fa2559f703f0955"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2104.15005",
    "kind": "arxiv",
    "version": 1
  }
}