MISAO Project

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* Profile

MisV1439

R.A.17h51m32s.83
Decl.+09o39'01".0(2000.0)
Mag.14.1-18.1C
TypeOVV-QSO
= USNO-A2.0 0975.09850990  17h51m32s.817 +09o39'00".61  Mag(R):17.0  M
  ag(B):17.9
= 4C 09.57  BLL  17 51 32.8186 +09 39 00.728  17.83B
= OT 081  17h51m32s.8 +09o39'02"  16.78 mag(V)  B-V:0.68  U-B:-0.47  -
  24.1 mag(abs)  z=0.320
= 1AXG J175132+0939  17h51m32s.66 +09o39'03".9  Value(ct/ks):77.6  Har
  d:-0.08
= LEDA 84878  17h51m32s.8 +09o39'00"

Digitized Sky Survey GIF image (15 x 15 arcmin)

SIMBAD Query

AAVSO VSX Database

ASAS-3 Light Curve

* Discovery Information

We discovered a quasar 4C 09.57 is an optically violently variable quasar in the course of the MISAO Project.

http://www.aerith.net/misao/variable/MisV1439.html

* Special Notes

Another optically violently variable quasar observed by the MISAO Project. But this is a well known quasar. We assigned the MisV number, but this is not our new discovery.

The outburst in 2007 observed by the MISAO Project has been already reported by Stefan Karge [vsnet-alert 9356], and published at Karge, S., 2007, The Astronomer, Vol. 44, No 520, 100.

Reinder J. Bouma searched the Skymorph archive and confirmed the clear variability of this object in 1997, 2002 and 2003.

* Research and Publication

* Light Curve

    13.9  +--------------------------------------------------------+
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    18.3  +--------------------------------------------------------+
       2454237                                                  2454563
     2007 May 16                                              2008 Apr. 6

* Observations by MISAO Project

DateMagFilterObserver
2007 May 31.6028514.1CYouichirou Nakashima
2007 May 31.6049514.2CYouichirou Nakashima
2007 May 31.6070514.1CYouichirou Nakashima
2007 July 30.5528614.4CYouichirou Nakashima
2007 July 30.5549514.4CYouichirou Nakashima
2008 Mar. 20.85221[15.3CYouichirou Nakashima
2008 Mar. 22.74017[17.0CKen-ichi Kadota
2008 Mar. 22.7503218.0CKen-ichi Kadota
2008 Mar. 22.7796618.1CKen-ichi Kadota

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