2 0 5 3877 206

En Ctudiant les photographies prises par M. S. Blajko, Mme L. Ceraski a trouvC ce 2 0 mai / 2 juin une variable dont voici la position approchCe:

1855.0 (I = 4"26m8 d = +74O50' 1900.0 4 32.6 +74 5 6 .

Nous en avons dix photographies prises en I 899- I 903.

Ce 3 juin, M. Blajko a estimC I'Ctoile de 8 gr. La A juger d'aprks ces clichCs, 1'Cclat varie de 9 B 13 gr.

pCriode est longue, de quelques mois.

The following stars were suspected of variability in the course of the reductions of a great mass of photometric, visual and photographic observations, of which the details will soon be published in the Publications of the Astrono- mical Laboratory at Groningen. The meaning of the ab- breviations used is as follows.

S = Observation by the present writer made with a Zollner photometer, attached to the 6 in. equatorial of the Cape Observatory.

I = Visual estimate by Mr. R. T. A . Junes, made by the 7 in. equatorial of the Cape Observatory.

P = Photographic plate taken at the Cape Observatory. c = Colour on Chandler's scale, as estimated by I The magnitudes from these three sources have been

reduced to the same photometric system, having a constant logarithmic light-ratio of 0.4 and coinciding approximately with the scale of the first two parts of the Cordoba DM. at mag. 9.0. The correction necessary to reduce the magnitudes of this system to the Harvard scale is +om41.

The probable errors of one observation are about fom15 for S and I and & o m l o for P. For very faint stars they are larger.

The coordinates are given for 1875.0.

I . Var. 23.1903 S c u l p t o r i s . Anon. I ~ z I ~ ~ ~ ~ -33"33.'4. P 1893 Dec. 2 8 10.70

1894 Jan. 8 9.76 S 1899 Sept. 14 10.30 I 1900 Jan. 23 10.97

D 2 4 10.41 P 1902 Jan. 26 no star; limit I I . O + .

2. Var. 24. 1903 C a n i s major i s . C. P. D. - - Z ~ ? Z Z ~ Z . 7l' 16 '~16?0 -25O 1217.

P 1893 Dec. 28 8.80 1894 Jan. 8 9.24

S 1899 Oct. 14 I 1.08 weight Nov. 13 10 .25

I 1900 Jan. 31 8.95 April 30 1 0 . 5 2

P 1902 Jan. 26 8.74 C. P. D. 9.4 '1 Cord. DM. 9.7 2,

l) Two plates in good agreement. a) = 9.53 photometric system.

3. Var. 25.1903 Pupp i s . a = C . P . D. -39Y2378. 8h20m54% -39O37:6. b = C. P. D. -39 2380. 56.8 37.9.

a B P 1895 April 2 j 10.14 10.73

x, 2 7 10.10 10.90 S 1899 Febr. 16 10.68') - I 1900 Febr.20 10.51 -

May 28 11.o3 9 . 2 5 , c 7 P 1902 May 26 10 .35 10.77

C. P. D. 9.8 10.0

Cord. DM. - 9.8 (= 10.05) I) a is s. f. and brighter of two stars. The note by S makes it probable that b is variable.

4. Var. 26.1903 N o r m a e . C. P. D. -46?8056. 1 6 ~ ~ 3 ~ 4 9 : ~ -46°40!0.

P 1895 April 28 8.80 May 2 0 9.30

S 1899 April 2 7 10.00

Sept. 26 9.00 I 1899 Oct. 24 9.72

P 1900 May I 9.55 I 1900 June 2 7 9.30

C. P. D. 9.3 Cord. DM. 9.9 (= 10.00)

5. Var. 2 7 . 1903 S a g i t t a r i i . C. P. D. -24O6006. 17h46m4~S9 -24O4819.

P 1893 Oct. 1 2 9.55 1895 June 2 7 9.30

I 1898 Oct. 23 9 78

I 1900 Sept. 1 5 9.67 P 1900 Sept. 1 7 10.24

s '899 Aug. 24 9.45

C. P. D. 9.6 9 Cord. DM. 10 (= < 10.60)

') Two plates in good agreement.

6. Var. 28.1903 C e t i . Anon. 2sh 53m10S - 2 5 ' 715.

P I893 Oct. 7 9.77 1894 Sept. 26 10.36 1900 Aug. 2 7 no star, limit 11.o-e

S 1899 Sept. I 1900 Sept. 1 5 , 18 no star, therefore < 11.5.

I , 6, Oct. 6, Nov. 25 no star, therefore < I 1.0

_____- Grooingen, I 903 May. W. de Sitter.