Pith Number

pith:PKSRXZ4H

pith:2018:PKSRXZ4HOMOAMW33P2LUXCH4V7

not attested not anchored not stored refs pending

The ionisation parameter of star-forming galaxies evolves with the specific star formation rate

Brent Groves, Daichi Kashino, Fuyan Bian, Jeyhan Kartaltepe, John Silverman, Lisa Kewley, Melanie Kaasinen

arxiv:1804.10621 v1 · 2018-04-27 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PKSRXZ4HOMOAMW33P2LUXCH4V7}

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	2026-05-18T00:17:16.073091Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7aa51be787731c065b7b7e974b88fcafca3986aac159106a82bba6ce007f91ad

Aliases

arxiv: 1804.10621 · arxiv_version: 1804.10621v1 · doi: 10.48550/arxiv.1804.10621 · pith_short_12: PKSRXZ4HOMOA · pith_short_16: PKSRXZ4HOMOAMW33 · pith_short_8: PKSRXZ4H

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/PKSRXZ4HOMOAMW33P2LUXCH4V7 \
  | 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: 7aa51be787731c065b7b7e974b88fcafca3986aac159106a82bba6ce007f91ad

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "52220dae6c5cd412a51ca4f466744c1f79b978855bdf2d6d4e3a4ea88fe7dcbb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-04-27T18:00:01Z",
    "title_canon_sha256": "1936c4cb83a94dc7a3ab1ce74e4c94e2a4acf27de708798126dc42378ee1c2f0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.10621",
    "kind": "arxiv",
    "version": 1
  }
}