Pith Number

pith:6HMHS2CZ

pith:2009:6HMHS2CZMXEMZKFBRAU5BFY4B2

not attested not anchored not stored refs pending

The close circumstellar environment of Betelgeuse - Adaptive optics spectro-imaging in the near-IR with VLT/NACO

Guy Perrin (LESIA), Jan Cami, Pierre Kervella (LESIA), Stephen T. Ridgway (NOAO), Sylvestre Lacour (LESIA), Tijl Verhoelst, Xavier Haubois (LESIA)

arxiv:0907.1843 v1 · 2009-07-10 · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6HMHS2CZMXEMZKFBRAU5BFY4B2}

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	2026-05-18T02:13:03.952757Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f1d879685965c8cca8a18829d0971c0ea9d21061db976c5633a7b3abd88ef909

Aliases

arxiv: 0907.1843 · arxiv_version: 0907.1843v1 · doi: 10.48550/arxiv.0907.1843 · pith_short_12: 6HMHS2CZMXEM · pith_short_16: 6HMHS2CZMXEMZKFB · pith_short_8: 6HMHS2CZ

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/6HMHS2CZMXEMZKFBRAU5BFY4B2 \
  | 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: f1d879685965c8cca8a18829d0971c0ea9d21061db976c5633a7b3abd88ef909

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d0f0357109ac7ae8fd758260de7cdad132429c8f79cbfa9b6516dc1303286791",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-07-10T15:20:31Z",
    "title_canon_sha256": "70f839907f7a6670be9f8dc50616569852e2b81fe62d734752d3ba88f974e56d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.1843",
    "kind": "arxiv",
    "version": 1
  }
}