Pith Number

pith:SENMCVNQ

pith:2009:SENMCVNQIHQ2QOAFABZESUX2HX

not attested not anchored not stored refs pending

Optical Observations of M81 Galaxy Group in Narrow Band [SII] and H_alpha Filters: Holmberg IX

B. Arbutina, B. Vukotic, D. Ilic, D. Onic, D. Urosevic, K. Stavrev

arxiv:0912.5032 v1 · 2009-12-26 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SENMCVNQIHQ2QOAFABZESUX2HX}

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	2026-05-18T02:33:55.326258Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

911ac155b041e1a8380500724952fa3ded6066eb1220c8f55361eb974f21cf90

Aliases

arxiv: 0912.5032 · arxiv_version: 0912.5032v1 · doi: 10.48550/arxiv.0912.5032 · pith_short_12: SENMCVNQIHQ2 · pith_short_16: SENMCVNQIHQ2QOAF · pith_short_8: SENMCVNQ

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/SENMCVNQIHQ2QOAFABZESUX2HX \
  | 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: 911ac155b041e1a8380500724952fa3ded6066eb1220c8f55361eb974f21cf90

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "40ae78117440c43c296b9e4ce43eafdab3df014704811547c4de46929c63f9e5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-12-26T19:04:39Z",
    "title_canon_sha256": "e9108698f59cb711b8b84c25da217a6f953f0cd4a2b2506132d270977c6feb47"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.5032",
    "kind": "arxiv",
    "version": 1
  }
}