Pith Number

pith:4XDY5U4I

pith:2021:4XDY5U4IXWDSIPJHG2HLYEE5GN

not attested not anchored not stored refs pending

The ZTF Source Classification Project: I. Methods and Infrastructure

Andrew Drake, Ashish A. Mahabal, Ben Rusholme, C. Fremling, David Hale, Dmitry A. Duev, Frank J. Masci, Jan van Roestel, Kevin Burdge, Lynne Hillenbrand, Maayane T. Soumagnac, Matthew J. Graham, Michael W. Coughlin, Philippe Rosnet, Przemek Mr\'oz, Reed Riddle, Richard Walters, Roger Smith, Russ R. Laher, S. R. Kulkarni, Thomas A. Prince

arxiv:2102.11304 v1 · 2021-02-22 · astro-ph.IM · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4XDY5U4IXWDSIPJHG2HLYEE5GN}

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	2026-07-05T02:43:18.348366Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e5c78ed388bd87243d27368ebc109d3373f0fc94b61c63e767510c7a25671a6d

Aliases

arxiv: 2102.11304 · arxiv_version: 2102.11304v1 · doi: 10.48550/arxiv.2102.11304 · pith_short_12: 4XDY5U4IXWDS · pith_short_16: 4XDY5U4IXWDSIPJH · pith_short_8: 4XDY5U4I

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/4XDY5U4IXWDSIPJHG2HLYEE5GN \
  | 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: e5c78ed388bd87243d27368ebc109d3373f0fc94b61c63e767510c7a25671a6d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0fbca88b316399600e9e43b9fc879294d94ff29db49fbe8e87564c666178c7c4",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2021-02-22T19:01:21Z",
    "title_canon_sha256": "4136538221fda8c0e9faf06a6c07ac58df7a2e82d55fb8aa009eaf3d38114c5d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2102.11304",
    "kind": "arxiv",
    "version": 1
  }
}