Pith Number

pith:27OBDNSU

pith:2009:27OBDNSUMBX6OEDSFUD44AAZ4K

not attested not anchored not stored refs pending

The active and passive populations of Extremely Red Objects

1) ((1) INAF-Osservatorio Astronomico di Trieste; (2) Max-Planck-Institute fuer Astronomie, 2), Fabio Fontanot (1, Heidelberg; (3) Dipartimento di Astronomia, Pierluigi Monaco (3, Universita' di Trieste)

arxiv:0911.5346 v2 · 2009-11-27 · 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{27OBDNSUMBX6OEDSFUD44AAZ4K}

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	2026-05-18T02:10:36.046774Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d7dc11b654606fe710722d07ce0019e2a21541e63ed338308081b2ce67712ad8

Aliases

arxiv: 0911.5346 · arxiv_version: 0911.5346v2 · doi: 10.48550/arxiv.0911.5346 · pith_short_12: 27OBDNSUMBX6 · pith_short_16: 27OBDNSUMBX6OEDS · pith_short_8: 27OBDNSU

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/27OBDNSUMBX6OEDSFUD44AAZ4K \
  | 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: d7dc11b654606fe710722d07ce0019e2a21541e63ed338308081b2ce67712ad8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f1823d427d80ae33fc69b63d2aac80c4a40ce79033e77479d1df92b45e1e2323",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-11-27T21:04:39Z",
    "title_canon_sha256": "b3550f2fb3cb705bc9f9f4cfcc608985ffabe1b5ca96a9a36300ee51db0bd065"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.5346",
    "kind": "arxiv",
    "version": 2
  }
}