WITH HPOL FROM Pine Bluff Obs and WIYN


First results:
Interstellar Polarization in the Direction of NGC1502 (senior author) in Polarimetry of the Interstellar Medium, ASP Conf Series, 97, 183, 1996

Further results:
Adding several additional stars observed 1995-8 with the HPOL on the 36" telescope at Pine Bluff or at WIYN:
'Some Polarimetry I Have Done at University of Wisconsin' in The Kth Reunion, pg 99; L. Davis Press (2000).

More observations were made of this cluster and the region, during the 1998-2004 observing seasons. Currently there are no plans to obtain more polarimetry in this area with HPOL at PBO because other possible targets are too faint to obtain good polarimetry, or too close together in the cluster.
Paper summarizing all the data:
A. J. Weitenbeck, E. A. Halstead and A. J. Carver, ISM Polarization toward NGC1502, Acta Astr 58, 41-54 2008. Reprint requests to

Chris Anderson (Astro Dept) obtained MOS spectra at WIYN of some of the stars to measure ISM CH line at 4300Å.

I have looked at Schmidt plates in the Warner & Swasey Obs vault to get spectra of stars in the field (some of the fainter HD stars, and BD stars) for which good spectral types were lacking to decide which to do polarimetry on next.

I have prepared a list cross-referencing GSC numbers; ID numbers in the studies of the cluster by Purgathofer, Hoag et al, Dombrovskii & Hagen-Thorn, and Zug; BD numbers; and other stars listed on SIMBAD for stars within about 2 degrees of the cluster (a circle centered on HD25290, a few arc min west of the cluster center). Cross-referencing to the GSC gives better positions than in the original catalogs much of the time; needed for telescope pointing at WIYN (and PBO).
These IDs now appear in SIMBAD. Paper is in AJ 114, 222 July 1997. The list (without the Zug numbers) is available here as a text file.
This region needs good photometry and spectral types; other observers take note.


I analyzed the stars for which there were observations done with the Reticon in the HPOL archive for which the polarization is mostly interstellar, but which did not appear in a publication about the projects for which they were originally observed.
We have observed other stars with ISM polarization, as a general ISM polarization program, including double stars (to try to find small scale ISM structure, a continuation of my thesis project).
This data yields:
1)polarization measures of stars for which no published value is available; useful for studies of the galactic magnetic field and dust distribution,
2) improved values for lambdamax and pmax (usual Serkowski Law terminology) for stars with published measurements obtained by filter polarimetry,
3) better estimates of the possibility of intrinsic polarization for stars of types which may have same, but which have been used as ISM probes in earlier studies.
Three papers with title 'Stars with ISM Polarization Observed with HPOL'
Paper I is Acta Astr, 49, 59, 1999. reprint as a .ps file.
Paper II is Acta Astron 54, 87 2004 (reprint requests to
Paper III is Acta Astron 58, 433 2008 (reprint requests to This paper includes HD100340 and several stars along the line of sight to it; ISM plzn is not zero = a few tenths percent.
These papers include all the stars observed for the general ISM program.
HPOL is undergoing refurbishment to be mounted elsewhere than at PBO; probably there will not be a general ISM program in the future.
One double star is described in 'Some Polarimetry I Have Done at University of Wisconsin', in The Kth Reunion, pg 99, L. Davis Press, 2000, and in Paper I; two others are in Paper II, one in Paper III.

Several stars in the direction of MKN421 have been observed at PBO to estimate the ISM polarization.
Astr Nachr 324, No. 5, 489 2003. Reprints available from

As part of planning for WUPPE, several low polarization B stars were observed at PBO. The polarization values are improvements over values in the literature. PASP 110,917 Aug 98.

Spectropolarimetry of 68 Oph. (senior author) BAAS 26, 910, 1994

Spectra of spectrum standard stars observed with HPOL have been plotted. Some of these are stars observed for that purpose, others are stars with HPOL observations made for other programs.
These can be used to classify stars with HPOL observations but not good spectral types, and as illustrations for classroom use.


UV Spectropolarimetry of MKN421, BAAS 27, 1209, 1995 Poster as a .txt file

WUPPE Observation of 3C273, BAAS 27, 1410, 1995 Poster as a .txt file

WUPPE Observations of LMC Stars, BAAS 28, 914, 1996. Poster as a .txt file

UV ISM Polarization of Galactic Starlight II. More Observations by WUPPE, BAAS 37, 490 2005 Poster as a .txt file
A poster on some WUPPE offset targets & direct pointings in UIT fields with ISM polarization, given at the Summer 2005 AAS meeting.

These are the WUPPE poster papers I was listed as first author; for further details of these observations, ask me.
[Other poster papers discussing other ASTRO-2 WUPPE results have been given with me somewhere in the authorship list.]

Several papers discussing WUPPE results have been published in journals, are in press, have been submitted, or are in preparation with me somewhere in the (frequently alphabetized) authorship list. Of all the papers for which I was not the first author, I made the greatest input on the ISM polarization paper.

I have worked on the WUPPE observations of stars in the LMC, and other similar observations which were offset targets, direct pointings in UIT fields, and HUT targets. These observations, though generally not as high quality observations as the WUPPE prime targets, may be useful as addenda to WUPPE projects, especially the ISM program; some of these appear in the BAAS 37 paper listed above.
Collaborators to obtain polarimetry for southern hemisphere WUPPE targets, and a couple of faint northern targets, would be welcomed.


I reexamined WFPC-1 polarimetry data for NGC1068.
Presented at the AAS meeting in Chicago, 1999. Abstract BAAS 31, 1244 1999
Full paper at the STScI website.


The Microscale of the Interstellar Medium from Polarimetry of Double Stars. PhD thesis, astronomy, Case Western Reserve U, 1976
I have obtained polarimetry of some other doubles since that time. For further details, ask me.

A Survey of Halpha in the Brighter, Northern Be Stars (junior author), in Be and Shell Stars, IAU Sympos 70, 29, 1976

Coulomb Energy and the Double Hump Potential. MS thesis, physics, Marquette U, 1971

Other astronomy research results were reported in International Astronomical Union Circulars 2342, 2345, 2415 and 2792