Pith Number

pith:W4JVS42H

pith:2015:W4JVS42HWLAPPK2JF6NTHK5437

not attested not anchored not stored refs pending

Discovery of a wandering radio jet base after a large X-ray flare in the blazar Markarian 421

A. Doi, H. Nagai, K. Hada, K. Niinuma, M. Kino, S. Koyama

arxiv:1507.04082 v1 · 2015-07-15 · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{W4JVS42HWLAPPK2JF6NTHK5437}

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	2026-05-18T01:36:49.183038Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b713597347b2c0f7ab492f9b33abbcdfcf88973f828fd7df55fddf604f75246c

Aliases

arxiv: 1507.04082 · arxiv_version: 1507.04082v1 · doi: 10.48550/arxiv.1507.04082 · pith_short_12: W4JVS42HWLAP · pith_short_16: W4JVS42HWLAPPK2J · pith_short_8: W4JVS42H

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/W4JVS42HWLAPPK2JF6NTHK5437 \
  | 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: b713597347b2c0f7ab492f9b33abbcdfcf88973f828fd7df55fddf604f75246c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fc4ace3b50d8cf468c5baaa933686db5020799cca2beae4c6243248d119064f1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2015-07-15T04:51:09Z",
    "title_canon_sha256": "5e897f9aea7555216f3bf54b632e2c189b7bb2883e044e3b793a276fb56f2b65"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1507.04082",
    "kind": "arxiv",
    "version": 1
  }
}