David's Astronomy Pages
CCD Images - Session 289 (2008-05-31)

 Previous Imaging Session
Images
(S288) 		  Home
Images
Sessions 		  Home
Home
Page		   Next Imaging Session
Images (S290) 		 
Objects Session Notes
Bullet V2491 Cyg - nova
Bullet Astrometric & Photometric Monitoring
- SS Cyg (dwarf nova)
- SS Her, U Her (mira variable)
- BL Lac (blazar)
- V2491 Cyg (nova)
- Barnard's Star, 61 Cyg (Nearby Stars)

 
- Late evening/night session (2.3hr) - operated & monitored under remote control
- CCD operation of -20 degC 
(at 80% average cooling). 
- main objective was to acquire images of certain selected stars for ongoing photometric and astrometric analysis

V2491 Cyg - nova

V2491 Cyg (Cygnus) 
Nova 'V2491 Cyg' was discovered in Cygnus by 
Koichi Nishiyama, Kurume, Fukuoka-ken, Japan, 
and Fujio Kabashima, Miyaki-cho, Saga-ken, Japan, 
on unfiltered CCD images taken 2008-04-10.728 UT 
at magnitude 7.7 (IAU Circular No. 8934)
(AAVSO Special Notice #103)

Image below (2008-05-03.04 UT) was taken 
22.3 days above nova discovery.
Estimated magnitude +11.2 (C)
Image
Annotated CCD Image 
3 x 120s exposure (average combine), 2x2 binning, C Filter 
2008-05-03 00:56hUT (#285129-31)

V2491 Cyg - detail (2008-05-03.04 UT)
taken 22.3 days after nova discovery.
Estimated magnitude +11.2 (C)
Nova is marked by white indicators 
Image
CCD Image 
3 x 1 20s exposure (average combine), 2x2 binning, C Filter 
2008-05-03 00:56hUT (#285129-31)

V2491 Cyg - Earlier Image (2008-04-14.98 UT)
 taken 4.25 days after nova discovery.
Estimated magnitude +8.9 (C)
Image
CCD Image 
3 x 20s exposure (average combine), 2x2 binning, C Filter 
2008-04-14 23:48hUT (#281164-66)

DSS Reference Image
(same fov as above image)
Image
 [ image from http://archive.stsci.edu/cgi-bin/dss_form ]

Back to Top

Astrometric and Photometric Monitoring

Back to Top

This Web Page: CCD Images - Session 289  (2008-05-31)
Last Updated : 2015-05-16
Site Owner : David Richards
Home Page : David's Astronomy Web Site