spectro-aras.com

The nova appears to have reached its maximum brightness in the visual band at V ~10.8 around 10th Aug. On 11th Aug its B-V colour index reddened to 1.93 compared to a mean of 1.65 over the previous 10 days while it was brightening. The spectrum on 11th Aug shows a further increase in continuum flux ...

The nova now appears to be approaching its maximum brightness with V = 11.56. Fe II lines are still present while the flux in H-alpha and H-beta has decreased to 1.9E-12 and 1.5E-13 erg/cm2/sec respectively. P Cyg absorption is still present on H-alpha and Fe II lines extending to -600 km/s. David n...

The nova has brightened steadily over the past 5 days reaching V = 12.07 on the night of 3rd August. The continuum level of the spectrum has correspondingly increased and there are now P Cyg absorption dips on most of the Fe II emission lines as well as on the H-alpha and H-beta lines. These typical...

Another spectrum of the nova recorded on 1st August under better conditions than my spectrum on 30th July. As before LISA (23 micron slit) + C11 SCT + SXVR-H694 (unbinned). The nova was slightly brighter at V = 12.81. Many Fe II lines now clearly visible. Flux in H-alpha and H-beta has reduced to 2....

A spectrum of Nova Cas 2020 recorded with a LISA spectrograph on a C11 SCT and calibrated in absolute flux using a concurrently measured magnitude of V = 13.395. Using PlotSpectra, the integrated absolute flux of the H-alpha and H-beta lines are 3.53E-12 and 2.52E-13 erg/cm2/sec respectively. These ...

Robin, I have found spectra I submitted to the ARAS database included or referred to in papers in the past but I cannot recall ever having been contacted by the authors directly. However I have been acknowledged either by name or collectively as part of the ARAS team in the paper and I consider that...

There is a new paper about Nova Per 2018 by the Slovak team on arXiv this morning which uses spectra from the ARAS database.
Contributing observers are named in the acknowledgements.

https://arxiv.org/abs/2007.13337v1

David

Hi Pete, I suspect your calibration problem is because you are using very few calibration lines at the blue end. This does not constraint the choice of lines which ISIS uses well enough so it is probably picking the wrong lines in the lamp spectrum to match these wavelengths in your file. This throw...

In the Tools menu of ISIS there is a sub-menu Spectra 3 which contains a function for converting .dat files to .fit files (and vice versa) with no need for the -1 suffix.

There are lots of other useful functions in the ISIS menu structure so it's worth exploring.

David

That's curious.

I just downloaded the file tns_2020nvb_2020-07-01.91_LT_SPRAT.txt from TNS and converted it to .dat as I described and then to .fit with ISIS and was able to display it correctly in ISIS.

Had you set the working directory in ISIS correctly?

David