Pith Number

pith:DR2UNPP7

pith:2015:DR2UNPP74CKZI3PWDULFED6J4G

not attested not anchored not stored refs pending

The Galactic Center Black Hole Laboratory

A. Alberdi, A. Eckart, C. Straubmeier, D. Kunneriath, D. Puetzfeld, J.A. Zensus, M. Valencia-S., N. Sabha, R. Sch\"odel, S. Britzen, V. Karas

arxiv:1501.02171 v1 · 2015-01-09 · astro-ph.GA · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DR2UNPP74CKZI3PWDULFED6J4G}

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	2026-07-05T02:29:24.005148Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1c7546bdffe095946df61d16520fc9e19ed5cb37bb2d70be985718c3d32c5fd8

Aliases

arxiv: 1501.02171 · arxiv_version: 1501.02171v1 · doi: 10.48550/arxiv.1501.02171 · pith_short_12: DR2UNPP74CKZ · pith_short_16: DR2UNPP74CKZI3PW · pith_short_8: DR2UNPP7

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/DR2UNPP74CKZI3PWDULFED6J4G \
  | 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: 1c7546bdffe095946df61d16520fc9e19ed5cb37bb2d70be985718c3d32c5fd8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b98ce006faef693992b7b6fac0434b49116fd1f7b96fe588a8e64490813bda51",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2015-01-09T15:19:20Z",
    "title_canon_sha256": "1bb2a2a4f67332633140247e8d2ae513cbf377eca3dab7c07fde81b6c1694798"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1501.02171",
    "kind": "arxiv",
    "version": 1
  }
}