Pith Number

pith:VACHKQZY

pith:2025:VACHKQZYY7WVENUF6BICJMMGZS

not attested not anchored not stored refs pending

The alternating 'changing-look' blazar OQ 334 (B2 1420+32): New observational clues to the blazar state transitions

Gopal-Krishna (CEBS), Krishan Chand (CUHP)

arxiv:2505.15900 v1 · 2025-05-21 · 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{VACHKQZYY7WVENUF6BICJMMGZS}

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	2026-07-05T11:07:27.273693Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a804754338c7ed523685f05024b186cc9298370f4f8990acd6aca5b72d540a06

Aliases

arxiv: 2505.15900 · arxiv_version: 2505.15900v1 · doi: 10.48550/arxiv.2505.15900 · pith_short_12: VACHKQZYY7WV · pith_short_16: VACHKQZYY7WVENUF · pith_short_8: VACHKQZY

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/VACHKQZYY7WVENUF6BICJMMGZS \
  | 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: a804754338c7ed523685f05024b186cc9298370f4f8990acd6aca5b72d540a06

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "00619043401f81b206d9c1bef32c0fea202ecca41f67a335278b974f6830134d",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2025-05-21T18:00:02Z",
    "title_canon_sha256": "b2d2b8c13fe33e2ba19c69d4a37a1a7f4c5fbbdf53669126062619df3f6e9226"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2505.15900",
    "kind": "arxiv",
    "version": 1
  }
}