Pith Number

pith:6K6HDPKA

pith:1999:6K6HDPKABS777CFXP3KAVUZUFI

not attested not anchored not stored refs pending

WHAM Observations of H-Alpha, [S II], and [N II] toward the Orion and Perseus Arms: Probing the Physical Conditions of the Warm Ionized Medium

L. M. Haffner, R. J. Reynolds, S. L. Tufte (UW-Madison)

arxiv:astro-ph/9904143 v2 · 1999-04-12 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6K6HDPKABS777CFXP3KAVUZUFI}

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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.

Cited by

1 paper in Pith

The origin of WHAM Point Source~46

Receipt and verification

First computed	2026-07-04T15:27:10.489625Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f2bc71bd400cbfff88b77ed40ad3342a0ea47c6abcb892e586219dda2e2c8139

Aliases

arxiv: astro-ph/9904143 · arxiv_version: astro-ph/9904143v2 · doi: 10.48550/arxiv.astro-ph/9904143 · pith_short_12: 6K6HDPKABS77 · pith_short_16: 6K6HDPKABS777CFX · pith_short_8: 6K6HDPKA

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/6K6HDPKABS777CFXP3KAVUZUFI \
  | 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: f2bc71bd400cbfff88b77ed40ad3342a0ea47c6abcb892e586219dda2e2c8139

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5394dc5b37cc81645aabddf4e22638761f6f352fae4b99fbf557a38feaa55e85",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-04-12T17:02:09Z",
    "title_canon_sha256": "2ab6230cdc2b3577059f165fadc782feabc4719e9da1ee9413621467c958f974"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9904143",
    "kind": "arxiv",
    "version": 2
  }
}