Pith Number

pith:QKIWP6RB

pith:2008:QKIWP6RBUEPEP4MTY34GLWB4IA

not attested not anchored not stored refs pending

New very massive stars in Cygnus OB2

Amparo Marco (Alicante), Artemio Herrero (IAC, Ignacio Negueruela, La Laguna), Simon Clark (Open University)

arxiv:0806.2879 v1 · 2008-06-17 · 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{QKIWP6RBUEPEP4MTY34GLWB4IA}

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	2026-05-18T02:15:51.408839Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

829167fa21a11e47f193c6f865d83c40298926a3b722978c1750fbf36a59a6b6

Aliases

arxiv: 0806.2879 · arxiv_version: 0806.2879v1 · doi: 10.48550/arxiv.0806.2879 · pith_short_12: QKIWP6RBUEPE · pith_short_16: QKIWP6RBUEPEP4MT · pith_short_8: QKIWP6RB

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/QKIWP6RBUEPEP4MTY34GLWB4IA \
  | 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: 829167fa21a11e47f193c6f865d83c40298926a3b722978c1750fbf36a59a6b6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f7f50e4e6c2febcfed4bb55a1884af9d35f202d9c8816c795171b8e789e1bceb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-06-17T22:27:47Z",
    "title_canon_sha256": "4d2848c2191fefd1f80b3006960176f6c0ac456f9ac7bb327dd5e833274ea19a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0806.2879",
    "kind": "arxiv",
    "version": 1
  }
}