COMMISSION 27 OF THE I. A. U. INFORMATION BULLETIN ON VARIABLE STARS Number 2587 Konkoly Observatory Budapest 17 September 1984 HU ISSN 0374 - 0676 INFORMATION ON SIX NOVAE IN SAGITTARIUS In a project to locate several novae in Sagittarius for Dr. Hilmar W. Duerbeck of the Observatorium Hoher List of Bonn University, I collected data on five novae and present precise coordinates for each, photographic magnitudes for each (Table I), finding charts of those for which no finding chart is available, and some comments on each one. In addition, I enclose a note on V1944 Sgr. Duerbeck (1984) is planning to publish a catalog which will include data on about 250 galactic novae. V3645 Sgr This was discovered on July 29, 1970 on an objective prism plate by Arhipova and Dokuchaeva (1970.). A finding chart (with sequence stars) was published by Arhipova, et al (1971). The precise coordinates of V3645 as measured here at the Maria Mitchell Observatory are 18h 32m 53.39s +-0.02s and -18d 44' 25.7" +-2.1", epoch 1950. Magnitude estimates are provided. V3889 Sgr This was discovered by Kuwano (1975) on July 13, 1975. A plate was taken here at Maria Mitchell especially for this nova. The precise coordinates are 17h 55m 11.55s +-0.10s and -28d 21' 34.9" +-3.3", epoch 1950. A finding chart and magnitude estimates are provided. V4021 Sgr This was also discovered by Kuwano (1977) but on March 27, 1977. It is just to the northeast of the globular cluster M22 at 18h 35m 11.45s +-0.15s and -23d 25' 35.5" +-1.2", epoch 1950. A finding chart and magnitude estimates are provided. V4027 Sgr This was discovered by MacConnell (1968) on an objective prism plate taken May 17, 1968. The coordinates as published by MacConnell are 17h 59m 18.87s and -28d 45' 23.8", epoch 1950. A finding chart and magnitude estimates are provided. Nova Sgr 1982 This was discovered by Honda (1982) on October 4, 1982. The coordinates as measured by Flynn and communicated by Candy (1982) are 18h 31m 32.75s and -26d 28' 28.0". There is a preliminary finding chart published by the AAVSO, but I have provided one that is more detailed. Magnitude estimates are also provided. Note on V1944 Sgr This was discovered by Apriamashvili (1960) at a magnitude of 13.0 on an objective prism plate taken May 24, 1960. No epoch was given for the coordinates published by Apriamashvili. However, It seems that the only way to reconcile the coordinates published by Apriamashvili and those published by Kukarkin et al (1970) is to assume that the epoch of those quoted by Apriamashvili is 1960. With this in mind then, I located the exact position of the nova on a photographic plate taken on June 16, 1960, 23 days after the nova's discovery. It appears that the area where V1944 should be is a very crowded star field and indications are that the image of V1944 is either partially or completely merged with one or more of the field stars. Unfortunately, the field of V1944 is near the edge of all the plates taken in June and July of 1960; as a result, the stars suffer significantly from the effects of coma. Even using the blink comparator technique of field comparison, no part of the blend of the images can be unambiguously ascribed to V1944 Sgr. The area examined in the blink comparator included the region where the nova would have been if the epoch of Apriamashvili's coordinates had been 1900 or 1950. Nothing positive was discovered at these two locations either. [FIGURE 1] Fig. 1: Finding charts for the four novae in Sagittarius. Each chart is 15' by 15' with north at the top and west to the right. The lower case letters denote sequence stars whose photographic magnitudes are given in Table II. The capital letters denote SAO stars: A=SAO186010, B=SAO187080, C=SAO186160 and D=SAO187001. Table I: Photographic magnitudes for the five novae. The dates in the table are JD-2400000. A left parenthesis means "fainter than". V3645 Sgr 40418 (15.5 40735 14.7: 40474 13.6 40737 14.8:: 40476 13.6 40746 15.0:: 40477 13.6 40767 15.0:: 40479 13.5 40799 15.1:: 40493 13.4 40803 15.6:: 40495 13.4 40806 15.6:: Table I : continued V3889 Sgr Nova Sgr 1982 42327 (14.4 44510 14.3 42542 (13.0:: 44525 14.3 42623 12.0 44757 14.2: 42634 12.7 44782 14.3 42934 15.0:: 44813 14.4: 43044 (14.4 44837 14.3: 45084 14.3 V4021 Sgr 45144 14.2 43044 (14.8: 45177 14.3 43047 (14.3 45223 (14.1 43308 11.4 45232 9.6 43314 11.7 45523 12.9 43318 11.7 45549 12.9 43340 11.8 45584 13.1 43375 11.9 45602 13.2 43417 12.0 45616 13.2 43690 (14.5 45879 14.1: 45902 14.1: V4027 Sgr 45913 14.0: 39761 (14.6 45930 14.1: 40002 12.0 45934 14.2 40003 12.0 40004 12.1 40028 14.1 40039 14.0: 40058 14.0: 40059 14.2: 40064 14.1: 40067 14.2 40068 14.2: 40084 14.2: 40087 14.1: 40092 14.2: 40114 14.3: 40120 14.2: 40382 14.6: 40417 14.9: Table II: This table lists the photographic magnitudes for each of the sequence stars in the four finding charts. Sequence stars V3889 V4021 V4027 Nova 1982 D --- --- --- 9.1 a 11.5 14.2 12.7 13.1 b 11.1 12.1 11.9 11.7 c 13.2 12.7 14.2 12.8 d 12.7 13.3 13.8 --- e 11.8 --- 10.9 --- f --- --- 13.0 --- g --- --- 12.3 --- This work was done under the supervision of Dr. Emilia P. Belserene and was funded by NSF grant AST-8320991. I would like to thank Dr. Belserene for her assistance and the National Science Foundation for their support. ATAOLLAH SARAJEDINI Maria Mitchell Obs. Nantucket, Mass. 02554 U. S. A. References: Apriamashvili, S. P. 1960, Astr. Tsirk. 222 Arhipova, V., Dokuchaeva, O. 1970, Infor. Bull. Var. Stars 494 Arhipova, V. P., Dokuchaeva, O. D., Nikulina, T. G. 1971, Peremennye Zvezdy, 18, 195 [BIBCODE 1971PZ.....18..195A ] Candy, M. P. 1982, IAU Circular 3741 [BIBCODE 1982IAUC.3741....2B ] Duerbeck, H. W. 1984, Astrophys. and Sp. Sci., 95, 93 [BIBCODE 1984Ap&SS..99...93D ] Kukarkin, B. V. et al. 1970, Third ed. General Cat. Var. Stars, Moscow Kuwano, Y. 1975, IAU Circular 2805 [BIBCODE 1975IAUC.2805....1O ] Kuwano, Y. 1977, IAU Circular 3055 [BIBCODE 1977IAUC.3055....1K ] MacConnell, D. J. 1968, Infor. Bull. Var. Stars 1340