Misure di brillanza
10 anni di misure
Fabio Falchi
Congresso di CieloBuio
Merate 6/4/2008
Campaign for photometric
measurements of night sky
brightness and atmospheric
extinction
•Università di Milano (1998-1999)
•Università Padova (5/2003-11/2005)
•ISTIL (dopo 11/2005)
•observer: Fabio Falchi
•wide field automatic CCD camera
•B,V night sky brightness and stellar
extinction
•aim: map validation and brightnessaerosol relationship
•1600 frames, more than 1000
brightness measurements on a 37
points grid in 22 clean nights from 8
Italian sites
contemporaneity with low gain
DMSP measurements
Sky Quality Meter
Characterization:
Cinzano 2005, Night sky photometry with Sky
Quality Meter, ISTIL Internal Report, 9
http://www.lightpollution.it/download/sqmreport.pdf
Gabbiana
San Benedetto Po
Brillanza totale a Gabbiana (MN)
brillanza in banda V (mag/arcsec^2)
21
20,8
20,6
20,4
20,2
20
19,8
19,6
misure CCD
condizioni particolari
19,4
misure SQM
Lineare (misure CCD)
19,2
19
8
00
/2
11
8
00
/2
05
7
00
/2
11
7
00
/2
05
6
00
/2
11
6
00
/2
05
5
00
/2
11
5
00
/2
05
4
00
/2
11
4
00
/2
05
3
00
/2
11
3
00
/2
06
data
Brillanza totale a San Benedetto Po (MN)
brillanza in banda V (mag/arcsec^2)
21
20,8
20,6
20,4
20,2
20
19,8
19,6
misure CCD
misure SQM
19,4
media di più notti
19,2
Lineare (misure CCD)
19
8
00
/2
12
8
00
/2
01
7
00
/2
01
6
00
/2
01
5
00
/2
01
4
00
/2
01
3
00
/2
01
2
00
/2
01
1
00
/2
01
0
00
/2
01
9
99
/1
01
8
99
/1
01
data
Brillanza artificiale a San Benedetto Po (MN)
1,925
andamento +7% annuo
misure
Treanor 1971
1,750
1,575
Brillanza artificiale (mcd/m^2)
1,400
1,225
1,050
0,875
0,700
0,525
0,350
0,175
0,000
3
201
9
200
5
200
1
200
7
199
3
199
9
198
5
198
1
198
7
197
3
197
9
196
data