Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A new reddening for RR Tel from the HeII Paschen lines   From the available STIS data of RR Tel, that have provided a coverage with
absolutely calibrated data in a wide wavelength range, we have obtained a new
determination of its reddening (E(B-V)=0.00) from the comparison of the
observed HeII Paschen lines decrement relative to HeII lambda 4686 (for 24 HeII
Paschen lines down to the region of the head of the series near lambda 2060 A)
with the theoretical one as given in Storey and Hummer (1995) for case B,
T=10,000 K and log Ne=6. This new E(B-V)=0.0 value has been confirmed from a
re-analysis of the IUE low resolution data. We recall that the so far generally
adopted value in the literature has been E(B-V)=0.10 as obtained by Penston et
al. (1983).

2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
19
The categories of this paper are: eess
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
15
The categories of this paper are: nucl-ex