Pith Number

pith:F4MRMLAU

pith:2018:F4MRMLAUAD5V3S6NXVYWBGYYHJ

not attested not anchored not stored refs pending

The Evolution of the HeII-Ionizing Background at Redshifts 2.3<z<3.8 Inferred from a Statistical Sample of 24 HST/COS HeII Ly$\alpha$ Absorption Spectra

Frederick B. Davies (University of California Santa Barbara), G\'abor Worseck (Universit\"at Potsdam), Joseph F. Hennawi (University of California Santa Barbara), J. Xavier Prochaska (University of California Santa Cruz)

arxiv:1808.05247 v2 · 2018-08-15 · astro-ph.GA · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{F4MRMLAUAD5V3S6NXVYWBGYYHJ}

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.

Cited by

1 paper in Pith

Closing the UV Gap: Rest-frame EUV science from high-redshift QSOs as a legacy-defining capability

Receipt and verification

First computed	2026-05-17T23:47:20.653300Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2f19162c1400fb5dcbcdbd71609b183a6591ea59725f77d33fd5f40d7e37c5c1

Aliases

arxiv: 1808.05247 · arxiv_version: 1808.05247v2 · doi: 10.48550/arxiv.1808.05247 · pith_short_12: F4MRMLAUAD5V · pith_short_16: F4MRMLAUAD5V3S6N · pith_short_8: F4MRMLAU

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/F4MRMLAUAD5V3S6NXVYWBGYYHJ \
  | 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: 2f19162c1400fb5dcbcdbd71609b183a6591ea59725f77d33fd5f40d7e37c5c1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "adb48d2390f9baae2254100109877c2ca6ad53c59491c33961cacf684d2c4a42",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-08-15T18:37:10Z",
    "title_canon_sha256": "4ac6016f775248648e35a318b0271bcb42ffb8423e6ac64b73a8dc5e6248dc33"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1808.05247",
    "kind": "arxiv",
    "version": 2
  }
}