V- and I-band images taken at Ouda Station, Japan.
IAUC No. 6675 announces the discovery of a possible nova by W. Liller.
position:
17h 54m.2 (J2000.0)
-30o 02'
1997 June 2.09 <11.5
5.085 and 5.087 8.5 (TP+orange filter)
6.120 V=9.0 (CCD, GSC sequence)
No spectroscopic observations have been reported.
We will use a tentative designation of "Nova Sco 1997" in vsnet-obs reports. Observations are encourged.
Regards,
Taichi Kato
Dear colleages,
M. Fujii (Amateur astronomer, Okayama, Japan) and H. Kawakita (Amateur astronomer, Osaka, Japan) informed me that they had carried out spectroscopic observation of possible nova in Scopius at June 7.6 UT with a hand-made spectrograph mounted on the 0.28m Schmidt Cassegrain telescope. The width and length of the slit correspond to 7 arcsec and 424 arcsec, respectively, and the spectral resolution was 1.2 nm.
Strong and broad emission lines of H-alpha (observed FWHM ~ 3200 km/s) and H-beta were found in their spectra, while the instrumental resolution was 550 km/s. I believe that it is indeed a nova.
Best regards,
Kazuya Ayani
Bisei Astronomical Observatory
Accurate position (IAUC) 17h 54m 11s.22 (J2000.0) -30o 02' 53".0
POSSIBLE NOVA SCO 1997. =======================I have quickly scanned the Mermilliod UBV catalogues (NASA ADC Selected Astronomical Catalogs, vols. 1 & 2), and found the following useful V mags for comparison stars:
HD No. (J2000) V B-V 162856 17:54:31 -29:47:05 9.14 0.13 162979 17:55:08.7 -29:48:41 8.36 0.54 316569 17:54:31.2 -29:47:09 9.35 0.29 316608 17:54:12.8 -30:12:53 9.59 0.17My observation of the nova:
1997 June 7: 11:25 (UT) mv = 10.0
20x65 binoculars.
/Mati
The Hipparcos Input Catalogue (HIC) provides the following potential comparison stars for possible Nova Sco 1997. Stars having errors smaller than 0.1 have been selected.
R.A. Decl. V B-V ---------------------------------------- 175415.5 -311538 (2000.0) HIC 8.83 0.15 175642.7 -313117 (2000.0) HIC 8.76 0.04 175915.3 -312630 (2000.0) HIC 8.55 0.50 180225.1 -312920 (2000.0) HIC 9.33 0.49 180317.6 -311153 (2000.0) HIC 8.95 0.47 174330.1 -301036 (2000.0) HIC 7.79 0.30 174506.9 -301059 (2000.0) HIC 9.26 1.10 174826.2 -301757 (2000.0) HIC 7.96 0.53 174917.3 -303549 (2000.0) HIC 6.66 0.39 175104.8 -305812 (2000.0) HIC 8.22 0.15 175112.4 -303333 (2000.0) HIC 8.08 0.15 175112.5 -303323 (2000.0) HIC 6.70 0.03 175133.7 -301712 (2000.0) HIC 8.91 0.13 175239.8 -301514 (2000.0) HIC 11.21 1.18 175533.3 -304058 (2000.0) HIC 8.89 0.13 175853.2 -301017 (2000.0) HIC 9.34 0.79 175858.0 -302042 (2000.0) HIC 9.74 1.73 175905.2 -301511 (2000.0) HIC 5.00 1.65 180041.1 -301255 (2000.0) HIC 9.75 0.88 174342.5 -293708 (2000.0) HIC 10.19 1.33 174530.0 -290704 (2000.0) HIC 10.02 0.60 174926.1 -292618 (2000.0) HIC 8.33 0.37 174941.7 -291657 (2000.0) HIC 9.53 0.56 175227.0 -293313 (2000.0) HIC 8.28 0.28 175508.6 -294840 (2000.0) HIC 8.36 0.54 = HD 162979 in Morel's vsnet-alert 971 175536.9 -295839 (2000.0) HIC 8.29 0.28 175832.2 -290831 (2000.0) HIC 9.83 1.09 175916.7 -290011 (2000.0) HIC 9.79 1.24 180227.0 -294002 (2000.0) HIC 10.69 1.25 180327.5 -293646 (2000.0) HIC 10.30 1.80 174754.1 -283735 (2000.0) HIC 10.20 0.65 175152.8 -284712 (2000.0) HIC 10.13 0.45 175839.0 -284532 (2000.0) HIC 5.99 -0.08 180019.9 -283714 (2000.0) HIC 9.26 0.22 180307.0 -283338 (2000.0) HIC 10.09 1.15
Regards,
Taichi Kato
The stars extracted from the GSPC field mentioned by B. Skiff in [vsnet-alert 974]. Hope this helps.
R.A. Decl. V B-V name -------------------------------------------- 180246.2 -305811 (2000.0) 8.59 0.05 S456-A 180433.4 -305207 (2000.0) 9.66 0.00 S456-B 180302.1 -303826 (2000.0) 10.41 0.53 S456-C 180339.8 -303906 (2000.0) 10.82 0.09 S456-D 180347.6 -305543 (2000.0) 11.25 1.19 S456-E 180405.2 -305742 (2000.0) 12.34 0.46 S456-F 180349.0 -305246 (2000.0) 13.13 0.56 S456-GRegards,
VSNET chart
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