Student or educator? Sign up with your school email and get 6 months of Pro free.
Cited by 309

The DOI matches its Crossref record.

Absolute calibration of millimeter-wavelength spectral lines.

Ulich, B. L., Haas, R. W.·1976·The Astrophysical Journal Supplement Series

Abstract

A detailed analysis of the chopper-wheel method of calibrating the intensity of a millimeter-wavelength spectral line is presented. Special techniques were used to construct a receiver which eliminates most of the usual calibration difficulties. The zenith atmospheric extinction between 3.5 mm and 2.6 mm wavelength was measured, and teh intensities of six spectral l ines in this range were absolutely calibrated with an estimated uncertainty (1 sigma) of 7 percent. The effects of the antenna power pattern on the corrected antenna temperature T_A* are calculated for several simple models of the source brightness distribution.

Overview

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1086/190361

Cites

Statistics

Verification

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Citations

Cited by

See all 309

Metadata

Authors
Ulich, B. L., & Haas, R. W.
Venue
The Astrophysical Journal Supplement Series
Published
1976-03
Volume
30
Pages
247
ISSN
  • 0067-0049 (ISSN-L)
  • 1538-4365
OpenAlex
W2008579027
Cited by
309
References
0
Type
conference abstract
Language
en
Open access
closed

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review

How to cite

Cite CoChat for the checks on this page, and the paper for its own findings.

This page
CoChat. (2026). Citation check: Absolute calibration of millimeter-wavelength spectral lines. https://app.cochat.ai/papers/10.1086/190361
The paper
Ulich, B. L., & Haas, R. W. (1976). Absolute calibration of millimeter-wavelength spectral lines. The Astrophysical Journal Supplement Series. https://doi.org/10.1086/190361

Data sources

Bibliographic data: Semantic Scholar, OpenAlex, Crossref.

Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.