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V4743 Sgr - Another Nova in Sgr

V4743 - Another Nova in Sgr

CCD Image by Doug West

Description of the Nova Sgr 2002 no.3 Image - V Band

The image of Nova Sgr 2002 No. 3 was taken with a 0.2 m SCT + ST-9E CCD camera by Doug West in Mulvane, KS. The image was taken on 09/21/2002 2:18 UT and is a median average of four 5 second exposures. The "light donuts" near the Nova are to be ignored. These artifacts are created by internal reflections between the CCD camera and the filter. The image center is at 19 01 05.1 -22 01 51 with a position angle of 8.13 degrees from North. The field of view is approximately 29"x29".

Spectrum by Doug West on 10/15/02

Click Image to Enlarge.

Description of the Nova Sgr 2002 no.3 Spectrum

The low-resolution spectrum of Nova V4743 Sgr was taken by Doug West in Mulvane, KS on 10/15/2002 01:27 UT. The spectrum was extracted from a 30 second exposure. The equipment forming the low-resolution spectrometer consists of a 0.2 m SCT + SBIG ST-9E CCD camera + Rainbow Optics Grating. MIRA and custom software are used to reduce the spectrum. The wavelength accuracy is approximately +/- 21 Angstrom. The signal- to-noise ratio for the spectrum is greater than 20 from 4000 to 8000 Angstrom. The spectrum clearly shows Hydrogen Alpha and Beta in emission. The broad H alpha peak is probably a combination of H alpha emission at 6562.8 and N II at 6583.4 and 6548.1 Angstrom. Since the 9/21/2002 spectrum posted on the AAVSO web page there has been significant growth in the emission complex between 8300 and 8550 Angstrom. These features are probably associated with OI at 8446 and Ca II at 8498, 8542, and 8662 Angstrom. There was also a growth in the features in the 5700 Angstrom region. These features could be associated with N II emission at 5755 and 5679 Angstrom.

Additional information about low resolution spectroscopy can be found in the April 2002 edition of CCD Views at http://www.aavso.org/sites/default/files/newsletter/CCD/ccdviewsvol3no2.pdf. A special thanks goes to Dave Hudgins for his help in the acquisition and processing of the spectrum.

Spectrum by Doug West on 9/21/02

Click Image to Enlarge.

Description of the Nova Sgr 2002 no.3 Spectrum

The low resolution spectrum of Nova Sgr 2002 No. 3 was taken by Doug West in Muvlane, KS on 09/21/2002 2:43 UT. The spectrum was extracted from a 20 second exposure. The equipment forming the low resolution spectrometer consists of a 0.2 m SCT + SBIG ST-9E CCD camera + Rainbow Optics Grating. MIRA and custom software are used to reduce the spectrum. The wavelength accuracy is approximately +/- 21 Angstrom. The signal- to-noise ratio for the spectrum is greater than 50 from 4000 to 8000 Angstrom. The spectrum clearly shows Hydrogen Alpha and Beta in emission. This is typical for a Nova near light maximum. Additional information about low resolution spectroscopy can be found in the April 2002 edition of CCD Views at http://www.aavso.org/sites/default/files/newsletter/CCD/ccdviewsvol3no2.pdf.

Alert Notice 297 Text

				THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS
                  25 Birch Street, Cambridge, MA 02138 USA
                         INTERNET:  aavso@aavso.org
                  Tel. 617-354-0484       Fax 617-354-0665

                AAVSO ALERT NOTICE 297 (September 23, 2002)

SUBJECT: 1855-22 NOVA SAGITTARII 2002 NO. 3 - ANOTHER NOVA IN SAGITTARIUS

1855-22 NOVA SAGITTARII 2002 NO. 3

Event: Nova

Discovered By: Katsumi Haseda, Aichi, Japan (IAUC No. 7975)

Discovery Magnitude: 5.0 photographic (120-mm f/3.5 camera lens and Tri-X
film; IAUC No. 7975)

Discovery Date: September 20.431 UT (IAUC No. 7975)

R.A. (2000): 19h 01m 09s.38
Decl. (2000): -22o 00' 05".9 +/- 0".75 
 (D. West, Mulvane, KS; IAUC No. 7975)

AAVSO Chart(s):  'a' and 'b' scale chart

for full 300 dpi images
http://www.aavso.org/charts/SGR/N_SGR_02_3/NSGR02_3-A.GIF
http://www.aavso.org/charts/SGR/N_SGR_02_3/NSGR02_3-B.JPG

for web browser printable images
http://www.aavso.org/cgi-bin/shrinkwrap.pl?path=/charts/SGR/R_SGR/RSGR-A...
http://www.aavso.org/cgi-bin/shrinkwrap.pl?path
=/charts/SGR/N_SGR_02_3/NSGR02_3-B.JPG

Report Object to the AAVSO as: 1855-22 N SGR 02#3

Observations Reported to the AAVSO:

                     AAVSO Observer                           AAVSO Observer
    UT        Mag.     Initials              UT        Mag.     Initials

SEP 21.0962    6.0: CCDV WJD             SEP 22.1549    6.2       SGE
SEP 21.1039    6.44 CCDB WJD             SEP 22.1910    6.1       HSC
SEP 21.1450    6.1       GAJ             SEP 22.2243    6.0       LMK
SEP 21.2292    5.8       LMK             SEP 22.3021    6.2       BJS
SEP 21.2409    5.8       LMK             SEP 22.3153    6.2       BJS
SEP 21.2674    5.8       BJS             SEP 22.3333    6.2       BJS
SEP 21.2889    5.8       LMK             SEP 22.3542    6.2       BJS
SEP 21.4100    5.8       BJS             SEP 22.5229    6.2       PEX
SEP 21.7639    5.7       SSW             SEP 22.6722    6.2       TDB
SEP 21.8125    5.9       OJR             SEP 22.7010    6.2       MLF
SEP 21.8299    6.2       TDB             SEP 22.7951    6.3       JON
SEP 21.8924    5.9       LCR             SEP 22.8229    6.4       OJR
SEP 21.9931    6.0       GAJ             SEP 22.8350    6.5       PYG
SEP 21.9937    6.1       MHI             SEP 22.9125    6.3       AAX
SEP 22.0062    6.0       VWA             SEP 22.9924    6.2       DPL
SEP 22.0139    5.9       GHT             SEP 22.9938    6.4       AAX
SEP 22.0174    6.0       STI             SEP 23.0208    6.6       KMA
SEP 22.0277    5.9       MGQ             SEP 23.0227    6.4       SET
SEP 22.0312    6.0       MHI             SEP 23.0424    6.4       WI
SEP 22.0514    5.9       BTB             SEP 23.0451    6.3:      FJD
SEP 22.0542    6.0       AAX             SEP 23.0703    6.37 CCDV WJD
SEP 22.0590    6.0       STI             SEP 23.0792    6.3       AAX
SEP 22.0625    5.9       ZPA             SEP 23.0861    6.2       MYC
SEP 22.0764    6.2       RDV             SEP 23.1979    6.1       RR
SEP 22.0771    5.85 CCDV WJD             SEP 23.3229    6.3       BJS
SEP 22.0806    6.18 CCDB WJD             SEP 23.4960    6.1       PEX
SEP 22.0896    5.7       BDD             SEP 24.1591    6.2       LNL
SEP 22.0910    5.27 CCDR WJD

We thank the following contributors for the data that they have provided
for this Alert Notice:

AAX - A. AMORIM, BRAZIL               MLF - I. MONARD, SOUTH AFRICA
BDD - D. BERNS, USA                   MYC - C. MARTIN, USA
BJS - J. BEDIENT, USA                 OJR - J. OSORIO, SPAIN
BTB - T. BRETL, USA                   PEX - A. PEARCE, AUSTRALIA
DPL - P. DOMBROWSKI, USA              PYG - G. POYNER, ENGLAND
FJD - J. FOLEY, USA                   RDV - D. RYLE, USA
GAJ - J. GARCIA, ARGENTINA            RR  - R. ROYER, USA
GHT - G. GAHERTY, CANADA              SET - C. STEPHAN, USA
HSC - C. HUDDLESTON, USA              SGE - G. SARTY, CANADA
JON - K. JONCKHEERE, BELGIUM          SSW - S. SWIERCZYNSKI, POLAND
KMA - M. KOMOROUS, CANADA             STI - P. STEFFEY, USA
LCR - C. LABORDENA, SPAIN             TDB - D. TAYLOR, CANADA
LMK - M. LINNOLT, USA                 VWA - A. VAN WERVEN, USA
LNL - N. LERNER, USA                  WI  - D. WILLIAMS, USA
MGQ - G. MENALI, USA                  WJD - J. WEST, USA
MHI - H. MENALI, USA                  ZPA - P. ZELLER, USA

Spectra: Fe II-class shortly after maximum (IAUC No. 7975)

Notes:
1. See the full announcement in International Astronomical Union Circular
(IAUC) No. 7975
2. Visit http://www.aavso.org/nsgr02n3.stm for images, spectra, and more
information

SUBMIT OBSERVATIONS TO THE AAVSO

We encourage observers to submit observations via our web site (online data
submission tool WebObs), or by email in AAVSO format to
observations@aavso.org. If you do not have AAVSO Observer Initials, please
contact Headquarters so we may assign them to you. The answering machine at
AAVSO Headquarters is on nights and weekends; use our charge-free number
(888-802-STAR = 888-802-7827) to report your observations, or report them
via fax (617-354-0665).

Many thanks for your valuable astronomical contributions and your efforts.

Good observing!

Janet A. Mattei
Director

Kerriann H. Malatesta
Technical Assistant
AAVSO 49 Bay State Rd. Cambridge, MA 02138 aavso@aavso.org 617-354-0484