Pith Number

pith:TMVPA5GG

pith:2009:TMVPA5GGUOH2VML2U2IPMVJ4TI

not attested not anchored not stored refs pending

Sigma Orionis IRS1 A and B: A Binary Containing a Proplyd

Alfred Krabbe, Bringfried Stecklum, Christof Iserlohe, Klaus W. Hodapp

arxiv:0907.3327 v1 · 2009-07-20 · astro-ph.SR · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{TMVPA5GGUOH2VML2U2IPMVJ4TI}

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	2026-05-18T02:12:55.705721Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9b2af074c6a38faab17aa690f6553c9a28e915f2828b7f19a23daf3e105d9cfb

Aliases

arxiv: 0907.3327 · arxiv_version: 0907.3327v1 · doi: 10.48550/arxiv.0907.3327 · pith_short_12: TMVPA5GGUOH2 · pith_short_16: TMVPA5GGUOH2VML2 · pith_short_8: TMVPA5GG

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/TMVPA5GGUOH2VML2U2IPMVJ4TI \
  | 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: 9b2af074c6a38faab17aa690f6553c9a28e915f2828b7f19a23daf3e105d9cfb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bdaf6e7cc31fc92d628211e47ac7270a0d70a9deb392d327d78179cd6befab6c",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-07-20T00:42:48Z",
    "title_canon_sha256": "87c21a8e953dd96632bf783aa0da418c063b807daaa2a4e40321b9fb2270425c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.3327",
    "kind": "arxiv",
    "version": 1
  }
}