Pith Number

pith:T6QU2OO5

pith:2013:T6QU2OO5YJRMKVKD3UVIBZSWKA

not attested not anchored not stored refs pending

A long-term X-ray monitoring of the ultraluminous X-ray source NGC 5408 X-1 with Swift reveals the presence of dips but no orbital period

D\'avid Cseh, Fabien Gris\'e, Hua Feng, Philip Kaaret, St\'ephane Corbel

arxiv:1305.1810 v1 · 2013-05-08 · astro-ph.HE · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{T6QU2OO5YJRMKVKD3UVIBZSWKA}

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	2026-05-18T01:50:04.755772Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9fa14d39ddc262c55543dd2a80e6565011d83c78038654694f9bfb8df3ed4abe

Aliases

arxiv: 1305.1810 · arxiv_version: 1305.1810v1 · doi: 10.48550/arxiv.1305.1810 · pith_short_12: T6QU2OO5YJRM · pith_short_16: T6QU2OO5YJRMKVKD · pith_short_8: T6QU2OO5

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/T6QU2OO5YJRMKVKD3UVIBZSWKA \
  | 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: 9fa14d39ddc262c55543dd2a80e6565011d83c78038654694f9bfb8df3ed4abe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ba0e1ea1b84f6083a951d16dea322f7f926a9eb6c43527fc227b5a2eddae553c",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2013-05-08T13:13:18Z",
    "title_canon_sha256": "4b190bec7da90d791bade3c1fea971cc0f86c1797088ccf88afd240cc56760db"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.1810",
    "kind": "arxiv",
    "version": 1
  }
}