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Solar Bulletin September, 2001
Solar Bulletin | | THE AMERICAN
ASSOCIATION OF VARIABLE STAR OBSERVERS - SOLAR DIVISION | Carl E. Feehrer,
Editor
9 Gleason Rd.
Bedford, MA 01730 | Email: cfeehrer@hotmail.com
ISSN 0271-8480 |
| | Volume 57 Number 9 | September
2001 |
| Table I. Mean Sunspot Numbers for September
[boldface =
maximum, minimum] | Table II. September
Observers | | Day | N | Raw |
s.d. | K-corrected | s.d. | s.e. | | 1 | 40 | 144 | 5.2 | 122 | 2.5 | 0.40 | | 2 | 47 | 153 | 5.4 | 126 | 3.1 | 0.45 | | 3 | 43 | 157 | 5.0 | 130 | 2.7 | 0.41 | | 4 | 38 | 164 | 7.5 | 130 | 3.7 | 0.60 | | 5 | 44 | 182 | 7.4 | 145 | 3.8 | 0.57 | | 6 | 46 | 214 | 8.9 | 171 | 4.4 | 0.65 | | 7 | 34 | 255 | 12.5 | 206 | 6.4 | 1.10 | | 8 | 41 | 260 | 12.7 | 208 | 6.6 | 1.03 | | 9 | 40 | 241 | 13.0 | 190 | 6.8 | 1.08 | | 10 | 31 | 214 | 11.8 | 176 | 6.2 | 1.11 | | 11 | 30 | 206 | 12.8 | 161 | 6.2 | 1.13 | | 12 | 39 | 218 | 10.8 | 170 | 4.6 | 0.74 | | 13 | 30 | 231 | 12.7 | 184 | 5.7 | 1.04 | | 14 | 29 | 199 | 8.9 | 168 | 5.2 | 0.97 | | 15 | 40 | 187 | 8.7 | 149 | 4.3 | 0.68 | | 16 | 44 | 171 | 8.8 | 135 | 3.5 | 0.53 | | 17 | 40 | 159 | 7.8 | 125 | 3.4 | 0.54 | | 18 | 32 | 189 | 8.6 | 151 | 5.5 | 0.97 | | 19 | 35 | 202 | 8.8 | 157 | 3.9 | 0.66 | | 20 | 26 | 245 | 9.4 | 193 | 3.9 | 0.763 | | 21 | 32 | 238 | 10.6 | 192 | 4.5 | 0.80 | | 22 | 39 | 264 | 11.5 | 206 | 4.5 | 0.72 | | 23 | 38 | 284 | 13.3 | 221 | 5.6 | 0.91 | | 24 | 28 | 266 | 14.8 | 211 | 5.3 | 1.00 | | 25 | 37 | 284 | 12.5 | 219 | 5.0 | 0.82 | | 26 | 40 | 259 | 11.2 | 201 | 5.4 | 0.85 | | 27 | 36 | 242 | 9.5 | 191 | 4.9 | 0.82 | | 28 | 31 | 246 | 8.2 | 193 | 4.8 | 0.86 | | 29 | 37 | 229 | 8.7 | 186 | 4.8 | 0.79 | | 30 | 37 | 225 | 11.3 | 183 | 5.9 | 0.97 | | 31 | --- | --- | --- | --- | --- | --- | | Means: | | 217.6 | | 173.3 | | | No. of Observations: 1104
No. of Observers: 68 |
Reporting Addresses Sunspot Reports -- email: solar@aavso.org - postal mail: AAVSO, 25 Birch St. Cambridge, MA
02138
- FAX (AAVSO): (617) 354-0665
SES Reports -- email: noatak@aol.com - postal mail: Mike Hill 114 Prospect St.
Marlboro, MA 01752
Magnetometer Reports -- email: capaavso@aol.com - postal mail: Casper Hossfield PO Box 23,
New Milford, NY 10959
- FAX: (973) 853-2588 or (407) 482-3963
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12
7
17
7
11
12
19
18
20
8
29
24
7
21
30
23
11
19
22
11
27
19
29
18
14
25
19
28
14
8
4
3
20
8
12
2
23
16
21
4
14
24
18
6
28
20
9
8
8
17
19
23
20
8
11
16
14
28
21
5
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29
| AAP
ANDE
BARH
BATR
BEB
BLAJ
BMF
BOSB
BRAB
BRAM
BRAR
BROB
CAMP
CARJ
CHAG
CKB
CLZ
COMT
CR
DEMF
DRAJ
DUBF
ELR
FEEC
FERJ
FLET
FUJK
GIOR
GOTS
HALB
HAYK
IMPR
JAMD
JEFT
JENJ
JENS
KAPJ
KHAR
KNJS
KUZM
LERM
LEVM
MALK
MARE
MARJ
MCE
MILJ
MMI
MUDG
OBSO
RICE
RITA
SCGL
SCHG
SIMC
STEF
STEM
STQ
SUZM
SZAK
SZUM
TESD
THR
URBP
VALD
VARG
WILW
YESH
| P.Abbott
E.Anderson
H.Barnes
R.Battaiola
R.Berg
J.Blackwell
M.Boschat
B.Bose
B.Branchett
M.Bradbury
R.Branch
R.Brown
P.Campbell
J.Carlson
G.Morales
B.Cudnik
L.Corp
T.Compton
T.Cragg
F.Dempsey
J.Dragesco
F.Dubois
E.Reed
C.Feehrer
J.Fernandez
T.Fleming
K.Fujimori
R.Giovanoni
S.Gottschalk
B.Halls
K.Hay
R.Imperi
D.James
T.Jeffrey
J.Jenkins
S.Jenner
J.Kaplan
R.Khan
J&S Knight
M.Kuzmin
M.Lerman
M.Leventhal
K.Malde
E.Mariani
J.Maranon
E.Mochizuki
J.Miller
M.Moeller
G.Mudry
IPS Obs.
E.Richardson
A.Ritchie
G.Schott
G.Scholl
C.Simpson
G.Stefanopoulis
G.Stemmler
N.Stoikidis
M.Suzuki
K.Szatkowski
M.Szulc
D.Teske
R.Thompson
P.Urbanski
D.delValle
A.Vargas
W.Wilson
H.Yesilyaprak
| | | | Table III. Means of Raw Group Counts (RG) and Ratios of Spots to Groups (S:G) in
September 2001 | | Day | RG | S:G | Day | RG | S:G | Day | RG | S:G | Day | RG | S:G | | 1 | 7.5 | 9.2 | 9 | 9.2 | 16.2 | 17 | 9.9 | 6.1 | 25 | 13.8 | 10.6 | | 2 | 8.2 | 8.7 | 10 | 7.8 | 17.4 | 18 | 12.2 | 5.5 | 26 | 13.5 | 9.2 | | 3 | 9.1 | 7.2 | 11 | 7.5 | 17.5 | 19 | 11.9 | 7.0 | 27 | 12.7 | 8.9 |
| 4 | 8.8 | 8.6 | 12 | 9.4 | 13.2 | 20 | 14.4 | 7.0 | 28 | 13.0 | 9.2 | | 5 | 9.5 | 9.2 | 13 | 9.5 | 14.3 | 21 | 11.7 | 10.3 | 29 | 12.5 | 8.3 |
| 6 | 10.8 | 9.8 | 14 | 9.2 | 11.6 | 22 | 12.5 | 11.1 | 30 | 12.6 | 7.9 | | 7 | 10.9 | 13.4 | 15 | 9.3 | 10.1 | 23 | 12.8 | 12.2 | 31 | --- | --- |
| 8 | 11.1 | 13.4 | 16 | 9.2 | 8.6 | 24 | 13.1 | 10.3 | Mn. | 10.88 | 10.4 |  | Click image to
enlarge.
Fig.1 Comparison of Ri (provisional) and Ra estimates for September.
(Ri Source: http://sidc..oma.be/index.php3) |
Smoothed Mean Sunspot Number (Rsm) for March 2001: 112.5
 | Click image to enlarge.
Fig.2 Monthly Ra and Smoothed Mean Sunspot
Numbers (Waldmeier method). |  | Click image to enlarge.
Fig.3 Maximum,
mean, and minimum Ra Values for Each Month from January 2000 to Present. | Return to the Solar Division home page
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