Pith Number

pith:AX3JP3ZK

pith:2008:AX3JP3ZK66JZNI3JHTWDBUREUV

not attested not anchored not stored refs pending

Optical Spectroscopic Observations of Cyg X-1=HDE 226868

Jingzhi Yan, Petr Hadrava, Qingzhong Liu

arxiv:0806.4232 v1 · 2008-06-26 · astro-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{AX3JP3ZK66JZNI3JHTWDBUREUV}

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	2026-07-04T17:11:32.251447Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

05f697ef2af79396a3693cec30d224a57201374dafeee74a64e94e96c5cfd49b

Aliases

arxiv: 0806.4232 · arxiv_version: 0806.4232v1 · doi: 10.48550/arxiv.0806.4232 · pith_short_12: AX3JP3ZK66JZ · pith_short_16: AX3JP3ZK66JZNI3J · pith_short_8: AX3JP3ZK

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/AX3JP3ZK66JZNI3JHTWDBUREUV \
  | 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: 05f697ef2af79396a3693cec30d224a57201374dafeee74a64e94e96c5cfd49b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3eae74393311d5c0d03c1c4b36e78d9c4df0dc8ad2bbd19f31eb463a375730f1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-06-26T03:36:02Z",
    "title_canon_sha256": "f604089ced80cdf13456515592b48ed196825a10eda34022352d8d311148b023"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0806.4232",
    "kind": "arxiv",
    "version": 1
  }
}