Pith Number

pith:KJDKGQ6Q

pith:2008:KJDKGQ6QNVSJ2LQH6MI3ORCI3M

not attested not anchored not stored refs pending

Luminous Blue Variable Stars In The Two Extremely Metal-Deficient Blue Compact Dwarf Galaxies DDO 68 and PHL 293B

(2) University of Virginia, Charlottesville, Kyiv, T. X. Thuan (2) ((1) Main Astronomical Observatory, Ukraine, USA), Y. I. Izotov (1)

arxiv:0809.3077 v1 · 2008-09-18 · 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{KJDKGQ6QNVSJ2LQH6MI3ORCI3M}

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	2026-05-18T02:35:14.769658Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5246a343d06d649d2e07f311b74448db1cd717dad2218d939a1fbb3da70e6d27

Aliases

arxiv: 0809.3077 · arxiv_version: 0809.3077v1 · doi: 10.48550/arxiv.0809.3077 · pith_short_12: KJDKGQ6QNVSJ · pith_short_16: KJDKGQ6QNVSJ2LQH · pith_short_8: KJDKGQ6Q

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/KJDKGQ6QNVSJ2LQH6MI3ORCI3M \
  | 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: 5246a343d06d649d2e07f311b74448db1cd717dad2218d939a1fbb3da70e6d27

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cad01feabfd5e68cae58226137ab9d82cec4ce0be2f31f8e52c79df359ac1018",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-09-18T06:54:20Z",
    "title_canon_sha256": "6a6d06c915a77dccffe170a46df4273a9f5bf5fed21cd3ea9696dfaba0e45478"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0809.3077",
    "kind": "arxiv",
    "version": 1
  }
}