Pith Number

pith:PFHMZR27

pith:2019:PFHMZR27Q4W5XYQA7RS3ZPCL4Q

not attested not anchored not stored refs pending

The Zwicky Transient Facility Alert Distribution System

Ben Rusholme, Eric C. Bellm, Frank J. Masci, George Helou, K. Simon Krughoff, Maria T. Patterson, Mario Juric, Matthew J. Graham, Shrinivas R. Kulkarni, V. Zach Golkhou

arxiv:1902.02227 v1 · 2019-02-06 · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PFHMZR27Q4W5XYQA7RS3ZPCL4Q}

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	2026-05-17T23:54:37.553869Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

794eccc75f872ddbe200fc65bcbc4be401514edecace2dff5aa3965432c02e90

Aliases

arxiv: 1902.02227 · arxiv_version: 1902.02227v1 · doi: 10.48550/arxiv.1902.02227 · pith_short_12: PFHMZR27Q4W5 · pith_short_16: PFHMZR27Q4W5XYQA · pith_short_8: PFHMZR27

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/PFHMZR27Q4W5XYQA7RS3ZPCL4Q \
  | 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: 794eccc75f872ddbe200fc65bcbc4be401514edecace2dff5aa3965432c02e90

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0a8cdfe580678b8daf06a23edc71392cbe6a60a328a59ddf51252e63def39850",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2019-02-06T15:18:00Z",
    "title_canon_sha256": "320a5c0102fa2496f50b6594db337c3efeb9b9c26b84d859845435e2f8333633"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.02227",
    "kind": "arxiv",
    "version": 1
  }
}