Pith Number

pith:62WJALCG

pith:2018:62WJALCG3USMGURXBF5Y6XVLZP

not attested not anchored not stored refs pending

Systems engineering applied to ELT instrumentation: The GMACS case

A. Souza, C. Froning, C. M. Oliveira, C. Papovich, D. Bortoletto, D. Jones, D. L. DePoy, D. M. Faes, E. Cook, H.-I. Lee, J. L. Marshall, K. Taylor, L. Schmidt, R. Ribeiro, S. Pak, T.-G. Ji, T. Prochaska

arxiv:1806.06390 v1 · 2018-06-17 · astro-ph.IM

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

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	2026-05-18T00:07:17.311502Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f6ac902c46dd24c35237097b8f5eabcbe659b3617e8a2b20d3db96fa4cde0015

Aliases

arxiv: 1806.06390 · arxiv_version: 1806.06390v1 · doi: 10.48550/arxiv.1806.06390 · pith_short_12: 62WJALCG3USM · pith_short_16: 62WJALCG3USMGURX · pith_short_8: 62WJALCG

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/62WJALCG3USMGURXBF5Y6XVLZP \
  | 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: f6ac902c46dd24c35237097b8f5eabcbe659b3617e8a2b20d3db96fa4cde0015

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "139e25aaf29a8a94ef819556f576ec355e12fde8ba68214b502d586180894ac9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2018-06-17T14:40:53Z",
    "title_canon_sha256": "3e36da237807d3f50d49ff2e7239d0295a8e6e87a113e5902bd1bf0bc1367a60"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1806.06390",
    "kind": "arxiv",
    "version": 1
  }
}