Pith Number

pith:BJJBGFCE

pith:2009:BJJBGFCE2KNB7M5C7U35YXMNIA

not attested not anchored not stored refs pending

Spectroscopic study of the variability of three northern Of+ supergiants

G. Rauw, M. De Becker, N. Linder

arxiv:0909.0643 v1 · 2009-09-03 · 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{BJJBGFCE2KNB7M5C7U35YXMNIA}

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	2026-05-18T02:34:36.621034Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0a52131444d29a1fb3a2fd37dc5d8d40392355b3130001c4f1222fed7fa97130

Aliases

arxiv: 0909.0643 · arxiv_version: 0909.0643v1 · doi: 10.48550/arxiv.0909.0643 · pith_short_12: BJJBGFCE2KNB · pith_short_16: BJJBGFCE2KNB7M5C · pith_short_8: BJJBGFCE

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/BJJBGFCE2KNB7M5C7U35YXMNIA \
  | 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: 0a52131444d29a1fb3a2fd37dc5d8d40392355b3130001c4f1222fed7fa97130

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ff3b17a88bcff5e655d5e10ed4cc7a2d141d33d2e971b9214b8285c529aedcf9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-09-03T12:56:18Z",
    "title_canon_sha256": "292cd187ead2e15bcb9caa917bad45c50cacb30de5d423b846b559ea644ed91e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.0643",
    "kind": "arxiv",
    "version": 1
  }
}