David's Astronomy Pages Images - Session 444 (2011-01-12)

Images (S443)

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Images (S445)

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Session Notes

FS Aur - Variable Star (Type UG) CZ Ori - Variable Star (Type UG)     NGC 746 - Irregular Galaxy NGC 812 - Spiral Galaxy & Supernovae 2010jj NGC 869 - Open Cluster NGC 2481 - Spiral Galaxy     UGC 2498 - Spiral Galaxy & Supernovae 2011D     Photometric Monitoring - Variables - RX And, U And, W And, Z And, FS Aur, KR Aur, CI Cyg, TT Ari, CI Cyg, S Cyg, SS Cyg, U Gem, AM Her, BL Lac, TZ Lyr, CN Ori, CZ Ori, FO Ori, FU Ori, DY Per, GK Per, FG Sge, V Sge - CI Cyg timeseries attempt (data compromised by insufficient S/N / insufficient expsoure times), NV Ori attempt (failed due to cloud), WZ Sge attempt (failed due to poor focus)     Astrometric Monitoring - Nearby Stars - Ross 248 (HH And),  61 Cyg, Groombridge 34

- Evening  session (6.6 hrs), patchy sky transparency, cloud developing at end of session - Session operated under semi-automated control, with remote monitoring from indoors computer.  - Ambient Temperature: -1.0°C  (minimum) - CCD operation -30°C (at 69% average cooling).   - main objectives of the session was to acquire images of selected project stars for ongoing photometric analysis.

FS Aur - Variable Star (Type UG)

FS Aur  (Auriga) FS Aurigae is a peculiar dwarf nova system exhibiting a number of periodicities and  other phenomena whose origin is not yet understood.  In addition to the strange periodicities present, the star also exhibits very  short dwarf nova outbursts that have not been well-defined and covered fully throughout the cycle. The star is the subject of a study by AVVSO & Dr. Vitaly Neustroev (U. of Oulu, Finland) In the image below FS Aur is in quiesence. Magnitude is estimated at +16.1 AVVSO Comparison stars are shown with V magnitudes values.

Annotated CCD Image (cropped) 3 x 60s exposure (average combine), 3x3 binning, C Filter  2011-01-12 20:55h UT (#444342-48) 12" LX200R  (at f/9.7) + ST-10XME

Exposures (60s) were also taken through V & R filters  however the star was too faint to perform useful photometry  (see image below) During outburst the star is expected to reach V=+13.5 to +14.0 and will  become as bright as the adjacent comparison stars (132 to 142 in image above)

FS Aur in single 60s V Filter frame

Annotated CCD Image (cropped) 60s exposure (single frame), 3x3 binning, V Filter  2011-01-12 21:00h UT (#444349) 12" LX200R  (at f/9.7) + ST-10XME

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CZ Ori - Variable Star (Type UG)

CZ Ori  (Orion)

Annotated CCD Image (75% size) 3 x 20s exposure (average combine), 3x3 binning, C Filter  2011-01-12 21:19h UT (#444367-75) 12" LX200R  (at f/9.7) + ST-10XME

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NGC 746 - Irregular Galaxy

NGC 746 (Andromeda)

Annotated CCD Image (cropped) 120s exposure (single frame), 3x3 binning, C Filter  2011-01-12 22:47 hUT (#444487) 12" LX200R  (at f/9.7) + ST-10XME

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NGC 812 - Spiral Galaxy & Supernovae 2010jj

NGC 812 with SN 2010jj (Andromedaa) Attempted follow up observation of SN 2010jj 71 days after discovery  however poor sky transparency and/or dew on telescope's  front corrector lens makes it impossible to see SN 2010jj

Annotated CCD Image (cropped) 4 x 120s exposure (average combine), 3x3 binning, C Filter  2011-01-12 20:16 hUT (#444319-22) 12" LX200R  (at f/9.7) + ST-10XME

Earlier Image off NGC 812 with SN 2010jj (Andromedaa) SN 2010jj (Type IIn) was discovered 2010/11/03.12 by Doug Rich Magnitude at discovery +16.9 (Rochester Supernova site | Discovery Image | Reference Image  Image below (2010-11-15.97) was taken 12.9 days after discovery. SN 2010jj is marked by white cross hair (est. mag +14.7)

Annotated CCD Image (cropped) 3 x 120s exposure (average combine), 3x3 binning, C Filter  2010-11-15 23:19 hUT (#437324-26) 12" LX200R  (at f/9.7) + ST-10XME

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NGC 869 - Open Cluster

NGC 869 (Perseus)

CCD Image (75% size) 3 x 20s exposure (average combine), 3x3 binning, C Filter  2011-01-12 23:23 hUT (#444530-32) 12" LX200R  (at f/9.7) + ST-10XME

NGC 869 - Colour

Approximate Colour CCD Image (75% size) 3 x 45s exposure (average combine), 3x3 binning, B Filter  3 x 30s exposure (average combine), 3x3 binning, V Filter  3 x 30s exposure (average combine), 3x3 binning, R Filter  2011-01-12 23:15 hUT (#444515-23) 12" LX200R  (at f/9.7) + ST-10XME

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NGC 2481 - Spiral Galaxy

NGC 2481 (Gemini)

Annotated CCD Image (cropped) 3 x 120s exposure (average combine), 3x3 binning, C Filter  2011-01-12 23:39 hUT (#444547-49) 12" LX200R  (at f/9.7) + ST-10XME

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UGC 2498 - Spiral Galaxy with Supernovae 2011D

UGC 2498 with SN 2011D (Andromeda) Supernova 2011D (Type IIb) was discovered 2011/01/05.09 by Catalina Real-Time Transient Survey  and Stan Howerton; Lick Observatory Supernova Search Discovery Magnitude 18.2 (Rochester Supernova site | Stan Howerton image | Reference Image | TNS 2011D )

UGC 2498 with SN 2011D - 2011-01-12 (T+7.7d) Image below (2011-01-12.75) was taken 7.7 days after discovery. Position of SN 2011D (very faint)is marked by white cross hair and is very faint. Poor image quality (due to poor sky transparency and noise associated with moon light)

Annotated CCD Image (cropped) 5 x 120s exposure (average combine), 3x3 binning, C Filter  2011-01-12 17:55 hUT (#444061-65) 12" LX200R  (at f/9.7) + ST-10XME

Negative CCD Image (cropped) Image details as above

Images of SN 2011D (in UGC 2498) on Supernova 2011 Page >>

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