0557-23 Supernova 1995ad in NGC 2139
Abstract:
We have been informed by the Central Bureau for Astronomical Telegrams (IAU Circular 6239) and R. McNaught, Anglo-Australian Observatory, of the visual discovery of a supernova in NGC 2139 by the Rev. Robert O. Evans, Coonabarabran, NSW, Australia, on Sep 28.8 UT at magnitude 14-14.5. The discovery was confirmed by McNaught on Sep 29.8, using the 1.0-m telescope+CCD at Siding Spring. Evans reported no image visible on Aug 25 with his 0.41-m reflector (IAU Circular 6239). The supernova is located 25" west and 5" south of the nucleus of NGC 2139, whose (2000) position is: R.A. 06h 01.1m Dec = -23 degrees 40' Spectroscopic confirmation was obtained by S. Benetti, European Southern Observatory, and D. Grupe, Universitats-Sternwarte, Gottingen, who reported that a fully-reduced CCD spectrogram (range 390-784 nm, resolution 0.4 nm) taken with the ESO 1.5-m telescope (+ Boller & Chivens spectrograph) at La Silla, Chile, on Sep 29.30 UT shows the object to be a type-II supernova around maximum (IAU Circular 6239).
Justification:
Please use the accompanying CCD (R) image provided by S. Benetti, ESO in observing 0557-23 SN 2139. Please report your observations in letter sequence, using the letters we have added to the comparison stars, and assigning 10 steps between each comparison star.
Requested Data Types:
Photometry
Targets
| Name | Magnitude | Variability Type | Photometry Notes | Spectroscopy Notes |
|---|---|---|---|---|
| ASAS J065458+0557.8 | 9.97 | MISC |
Cadence: Not Specified Precision: 100 |
Not Requested |
Spectroscopy Lines:
No spectroscopy lines provided
Photometry Filters:
No photometry filters provided
Comparison Stars:
No comparison stars provided
Co-Authorship
Observers are not eligible for co-authorship.
Additional Observer Input:
Not provided
Additional Submission Location:
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Forum URL
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Notes:
Principal Investigator: Rev. Robert O. Evans; Imported Campaign (Alert Notice #214)