Pith Number

pith:FMZZ33US

pith:2019:FMZZ33USW76QOVSYII7B7RC7SL

not attested not anchored not stored refs pending

The Effects of Diffuse Ionized Gas and Spatial Resolution on Metallicity Gradients: TYPHOON Two-Dimensional Spectrophotometry of M83

Barry F. Madore, Brent Groves, Henry Poetrodjojo, I-Ting Ho, Jeff Rich, Joshua J. D'Agostino, Lisa Kewley, Mark Seibert

arxiv:1905.03251 v1 · 2019-05-08 · astro-ph.GA

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	2026-05-17T23:46:17.386011Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2b339dee92b7fd075658423e1fc45f92d41cea9cd71d7a51be86b877f3d0b482

Aliases

arxiv: 1905.03251 · arxiv_version: 1905.03251v1 · doi: 10.48550/arxiv.1905.03251 · pith_short_12: FMZZ33USW76Q · pith_short_16: FMZZ33USW76QOVSY · pith_short_8: FMZZ33US

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/FMZZ33USW76QOVSYII7B7RC7SL \
  | 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: 2b339dee92b7fd075658423e1fc45f92d41cea9cd71d7a51be86b877f3d0b482

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b37a18be0a44a97b9890f65c1c78c94e84370e48f6fefe313688dcd100a78931",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-05-08T18:00:00Z",
    "title_canon_sha256": "1dd2cc0383732b7a319a5a58dbcc1b899dc942b2d2c5fb1d49a0785edcb126be"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.03251",
    "kind": "arxiv",
    "version": 1
  }
}