Pith Number

pith:7GYSV2TE

pith:2013:7GYSV2TESA2PYRR5TX5ZNPQ2NJ

not attested not anchored not stored refs pending

Constraints on axion-like particles from X-ray observations of Hydra galaxy cluster

Denis Wouters, Pierre Brun

arxiv:1304.0989 v2 · 2013-04-03 · astro-ph.HE · astro-ph.CO · hep-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7GYSV2TESA2PYRR5TX5ZNPQ2NJ}

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.

Cited by

3 papers in Pith

Neutron Star Eclipses as Axion Laboratories

Lights, Camera, Axion: Tracing Axions from Supernovae in the Diffuse $\gamma$-ray Sky

Bounds on massive graviton-like particles from searches for axion-like particles coupling to photons

Receipt and verification

First computed	2026-05-18T03:07:20.883631Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f9b12aea649034fc463d9dfb96be1a6a6f24681e15deda1f6b223f0c62783b93

Aliases

arxiv: 1304.0989 · arxiv_version: 1304.0989v2 · doi: 10.48550/arxiv.1304.0989 · pith_short_12: 7GYSV2TESA2P · pith_short_16: 7GYSV2TESA2PYRR5 · pith_short_8: 7GYSV2TE

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/7GYSV2TESA2PYRR5TX5ZNPQ2NJ \
  | 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: f9b12aea649034fc463d9dfb96be1a6a6f24681e15deda1f6b223f0c62783b93

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "076b97e949d646dfb85e67eb4b97012e31a95fe0b8d3ad8b2cb2022754e39f04",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "hep-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2013-04-03T15:39:53Z",
    "title_canon_sha256": "a7fe5440ce592dcdf2ac4afbc79827937ea7500acd86083653e44b42bfe7a930"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.0989",
    "kind": "arxiv",
    "version": 2
  }
}