[vsnet-chat 730] Re: on charts and sequences

[Taichi Kato <tkato@kusastro.kyoto-u.ac.jp>]

>   Maybe the AAVSO should free their comparision star magnitudes from its
> Atlas, and we can format them to SkyMap, Guide or Megastar.

  As a matter of fact, instead of trying to reproduce the chart images,
I have been trying to provide identifications in Huruhata's VS charts,
which may both facilitate comparison (and future re-calibration of the
archival data) between existing sequences and provide a convenient way
for each star-mapper users rather than downloading a large volume of image
files.  The result is something like

## Huru:PERUV(108)
GSC3693.2068 020956.19 +571359.3 (2000.0) 10.81 1
USNO1425.03068499 020956.211 +571359.12 (2000.0) 11.3 11.8
020956.1 +571359 (2000.0) 1115 -0.07 TYC3693.2068.1 plx=72.2(39.6) (0.11 0.12)

## Huru:PERUV(120)
GSC3693.1886 021006.48 +571357.3 (2000.0) 11.36 1
USNO1425.03072763 021006.462 +571357.45 (2000.0) 10.7 13.6

## Huru:PERUV(126N)
GSC3693.1862 021010.21 +571355.6 (2000.0) 12.59 1
USNO1425.03074349 021010.219 +571355.77 (2000.0) 12.8 13.2

## Huru:PERUV(126S)
GSC3693.2404 021006.48 +570749.5 (2000.0) 12.45 1
USNO1425.03072787 021006.510 +570749.49 (2000.0) 12.4 14.5

## Huru:PERUV(134)
GSC3693.1760 021011.10 +571251.1 (2000.0) 12.80 1
USNO1425.03074723 021011.102 +571251.66 (2000.0) 12.9 15.0

## Huru:PERUV(136N)
GSC3693.2240 021002.10 +571111.2 (2000.0) 13.41 1
USNO1425.03070962 021002.068 +571111.07 (2000.0) 13.7 15.0

## Huru:PERUV(136S)
GSC3693.1920 021003.81 +571016.1 (2000.0) 13.34 1
USNO1425.03071647 021003.774 +571016.11 (2000.0) 13.3 15.4

## Huru:PERUV(141)
USNO1425.03069320 020958.271 +571211.97 (2000.0) 14.1 15.7

## Huru:PERUV(146)
USNO1425.03074884 021011.516 +571013.50 (2000.0) 14.5 16.1

## Huru:PERUV(152)
USNO1425.03074932 021011.614 +571141.42 (2000.0) 14.9 17.0

  or identifications by names:

Huru:PERUV(108) GSC3693.2068
Huru:PERUV(120) GSC3693.1886
Huru:PERUV(126N) GSC3693.1862
Huru:PERUV(126S) GSC3693.2404
Huru:PERUV(134) GSC3693.1760
Huru:PERUV(136N) GSC3693.2240
Huru:PERUV(136S) GSC3693.1920
Huru:PERUV(141) USNO1425.03069320
Huru:PERUV(146) USNO1425.03074884
Huru:PERUV(152) USNO1425.03074932

  or by positional basis (as in the final products in my trials to identify
GCVS objects); this might be the easiest to be converted to any star-mapper
program.  Magnitudes on chart are in parentheses:

Huru:PERUV(108) P 2000 020956.19 +571359.3 GSC
Huru:PERUV(120) P 2000 021006.48 +571357.3 GSC
Huru:PERUV(126N) P 2000 021010.21 +571355.6 GSC
Huru:PERUV(126S) P 2000 021006.48 +570749.5 GSC
Huru:PERUV(134) P 2000 021011.10 +571251.1 GSC
Huru:PERUV(136N) P 2000 021002.10 +571111.2 GSC
Huru:PERUV(136S) P 2000 021003.81 +571016.1 GSC
Huru:PERUV(141) P 2000 020958.271 +571211.97 USNO
Huru:PERUV(146) P 2000 021011.516 +571013.50 USNO
Huru:PERUV(152) P 2000 021011.614 +571141.42 USNO

  However, speaking of the AAVSO Atlas, I believe the underlined sequences
have been from existing photoelectric V measurements.  Considering that we
already have publicly available, the most comprehensive catalog of modern
photoelectric measurements -- Hipparcos and Tycho catalogues, the need to
release the old subset of V measurements might be relatively small.

Regards,
Taichi Kato

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