[vsnet-alert 3065] Sequence for M88 supernova

[bas@lowell.Lowell.Edu (Brian Skiff)]

     Although there is no sequence specifically for NGC 4501 = Messier 88,
the Misselt BVR data for the dwarf nova AL Comae in the adjacent field may be
suitable at least for CCD observers.  N.B. that I have adjusted Misselt's V
magnitudes upward (brighter) by 0.04 to compensate roughly for the typical
zero-point offset in his data.
     In addition, there are several brighter stars close to M88 measured by
Richard Stanton.  The data are not published, and I have used the Thompson &
Bryan chart for the galaxy (which shows AL Com also) to get positions and the
rough V magnitudes for his stars.
     Finally it is worth noting that the offset from V for the GSC magnitudes
is quite small, and these might be used for some additional sequence stars.

\Brian



Name                  RA  (2000)  Dec    s     GSC       V    B-V   V-R     R
[S66c] 1200+15 8   12 32 07.5  +14 42 52 G  0880-0941  11.24  0.33 (0.21) 11.03
AL Com 1           12 32 16.0  +14 19 21 A             16.77  0.77  0.46  16.31
AL Com 2           12 32 26.6  +14 21 17 A             16.93  0.47  0.32  16.61
AL Com 3           12 32 27.9  +14 21 51 A             16.69  0.70  0.36  16.33
AL Com 4           12 32 29.7  +14 20 16 A             17.81  0.64  0.36  17.45

Note:  V-R in parens derived from B-V


Stanton V sequence
NGC 4501 119       12 32 03.9  +14 20 08 A  0880-0226  11.9
NGC 4501 120       12 31 57.1  +14 28 52 A  0880-0023  12.0
NGC 4501 135       12 32 10.0  +14 20 15 A  0880-0182  13.5
NGC 4501 137       12 32 01.2  +14 31 23 A  0880-0266  13.7
NGC 4501 139       12 32 09.5  +14 15 54 A  0880-0093  13.9
NGC 4501 147       12 32 08.8  +14 28 44 A  0880-0188  14.7

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