VERA C-bandの現状

veraserver.mtk.nao.ac.jp

VERA C-bandの現状

VERA C-band

(NAOJ VLBI/JSPS PD)

(NAOJ VLBI)


(NAOJ VLBI) 1

2011928


VERA C-band

6.7 GHz

Receiver

22 GHz

Receiver

43 GHz

Receiver

ADAM

6066

DC Local

BBC Local

Terminator (R)

A/D

Converter

Changer

LHCP RHCP

Terminator

2

2011928


Current Status

Old ver→,

New ver→,

1 Beam→ Switching

Tsys→R-SKY

Ae~0.50

(10-20%) Old New

3

2011928


System Troubles

200911VERA

TsysSW

→2011



4

2011928


Tsys : 100-130K

!"#"$%&'$

#()#()#*$ #()'&)'+$ '#)#%)&+$ '#)#,)#%$ '#)'#)''$ '')#')'($ '')#")&($ '')#-)#,$ '')'')'+$

"##$

%##$

&##$

'##$

#$

!'##$

!&##$

!%##$

!"##$

()#$%##**++'$


!"#"$%&'$

!%&!%&!'" !%&#$&#(" #!&!)&$(" #!&!*&!)" #!&#!&##" ##&!#&#%" ##&!+&$%" ##&!,&!*" ##&##&#("

Zoom

$!!"

#!!"

()#$%##**++'$

!"

2011928


5


Observation Mode for Line

DIR1000: GEO1K (16MHz 1 IF+0 IF)

→4~16MHz 1024ch x 1 IF

(ΔVbest=0.18km/s/ch)

DIR2000: GEO1K (16MHz 16 IF+0 IF)

→16MHz 1024ch x 2 IF, 16MHz 32ch x 14 IF

(ΔVbest=0.7km/s/ch)

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

6

2011928


Spectrum : DIR1000/DIR2000

W3(OH)

Total Power

~2500Jy

20094

Total Power

~1250Jy

200911

DIR1000 (ΔV=0.18km/s)

DIR2000 (ΔV=0.70km/s)

7

2011928


Spectrum: Resolved Out

W3(OH) -

25

Total Power

~2500Jy

20094

Cross Power

~80Jy

20094

DIR1000 (ΔV=0.18km/s)

DIR1000 (ΔV=0.18km/s)

8

2011928


Astrometry Test Case:

6.7GHz Methanol of W3(OH)

RA Offset [mas]

R.A. offset 3c

10

3b

5

5

3a

2

1

0

0 200 400 600 800 1000

DOY [day]

0

Dec offset [mas]

10

5

5

0

Dec Offset [mas]10

3c

3b

3a

2

1

D=1.67 (+0.21/0.17) kpc

0 200 400 600 800 1000

DOY [day]

Matsumoto et al. 2011

Vol.63 No. 6

9

2011928


2009116.7GHz


10-20%

QSO

kpc


DIR2000

DIR1000

10

2011928

More magazines by this user
Similar magazines