Pith Number

pith:QYGVKRO6

pith:2013:QYGVKRO6VWIR2OAZFFQ4GHT7E6

not attested not anchored not stored refs pending

Accurate measurement of the HI column density from HI 21cm absorption-emission spectroscopy

(2) Max-Planck-Institut fur Radioastronomie, Germany), India, Jayaram N. Chengalur (1), Nirupam Roy (2) ((1) National Centre for Radio Astrophysics, Nissim Kanekar (1)

arxiv:1305.0951 v1 · 2013-05-04 · 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{QYGVKRO6VWIR2OAZFFQ4GHT7E6}

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	2026-05-18T02:46:22.827083Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

860d5545dead911d38192961c31e7f27a4b1e8a31b726ad4d71200640d143ead

Aliases

arxiv: 1305.0951 · arxiv_version: 1305.0951v1 · doi: 10.48550/arxiv.1305.0951 · pith_short_12: QYGVKRO6VWIR · pith_short_16: QYGVKRO6VWIR2OAZ · pith_short_8: QYGVKRO6

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/QYGVKRO6VWIR2OAZFFQ4GHT7E6 \
  | 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: 860d5545dead911d38192961c31e7f27a4b1e8a31b726ad4d71200640d143ead

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9e0cb65d2bb6a7bd5bbb819b88a94c44588c5c55055e9b742dd0b966f6034d86",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2013-05-04T19:52:36Z",
    "title_canon_sha256": "5649b2ab36dc017450cdc0528ed6f293531ea14a0216fb883ccc813719f0eba0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.0951",
    "kind": "arxiv",
    "version": 1
  }
}