Nova Aql 1999 = V1493 Aql

(CCD image by Gianluca Masi)

(vsnet-alert 3224)

Dear vsnet members,

Akihiko Tago (Tsuyama, Japan) discovered a possible nova on two films obtained at July 13.558 and 13.560 UT:

R.A. 19h07m40s Decl. +12 32'15" (J2000) mag 8.8

The photographs were taken by himself using a 55mm (f/3) lens and T-max 400 film (unfiltered). He also notes that no star is visible at the position on the films taken on July 5 (limiting mag. is 11), and July 9 (10.5).

Taichi Kato (Kyoto Univ.) points out there is no known variable star nor IRAS source, which is likely to reach 8th mag., at the position.

I (Nakamura) have just observed this object, and confirmed its existence. The following position was obtained from two CCD frames taken with a 60cm (f/5.8) Ritchey-Chretien telescope at the Kuma Kogen Astronomical Observatory:

July 14.513UT
19h07m36.90s +12 31'26.2" (J2000)

Could someone take a spectrum of this object?

Best regards,
Akimasa Nakamura
Kuma Kogen Astronomical Observatory

Spectroscopic confirmation!

(vsnet-alert 3225)

Dear vsnet members,

I have just sent a following report to CBAT.

Congraturations, Mr. Tago!

K. Ayani and T. Kawabata at Bisei Astronomical Observatory (BAO), Okayama, Japan, obtained a low resolution spectrum (470-680nm) of the possible nova, which was discovered by A. Tago, on July 14.6 UT with BAO 1.01-m telescope. Strong, broad H-alpha and H-beta lines are visible. The H-alpha line has a FWHM of about 3400 km/s and a equivalent width of about 50 nm.

Best regards,

Kazuya Ayani
Bisei Astronomical Observatory

Astrometry by N. James

(vsnet-alert 3229)

Astrometry of N. Aql. '99 using a 0.3m Newtonian + SX CCD camera gives:

1999 July 14.91859 R.A. 19 07 36.91 Dec. +12 31 26.7

11 GSC stars with RMS residuals RA = 0".22, Dec = 0".23.

Nick James.

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Light curve

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GSC-based wide-field charts (with H/T magnitudes):

USNO-based close-up charts

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