[Message Prev][Message Next][Thread Prev][Thread Next][Message Index][Thread Index]
[vsnet-newvar 1489] (fwd) Publication: New suspected variable star in Crux
- Date: Mon, 1 Jul 2002 10:15:14 +0900 (JST)
- To: vsnet-newvar@ooruri.kusastro.kyoto-u.ac.jp
- From: Taichi Kato <tkato@kusastro.kyoto-u.ac.jp>
- Subject: [vsnet-newvar 1489] (fwd) Publication: New suspected variable star in Crux
- Sender: owner-vsnet-newvar@ooruri.kusastro.kyoto-u.ac.jp
From: "ASA" <asoastrosantafe@ciudad.com.ar>
Date: Sun, 30 Jun 2002 14:49:28 -0300
Subject: Publication: New suspected variable star in Crux
NEW SUSPECTED VARIABLE STAR IN CRUX
Buso, Victor A. (victorbuso@infovia.com.ar); Ballan, Gustavo E.
(gballan@infovia.com.ar); Mansilla, Luis A.
(luismansilla@ciudad.com.ar); Bustos, Fabian A.; Severi, Leonardo
(lseveri@terra.com.br); Pintado, Olga Ines (opintado@tucbbs.com.ar)
Observatorio Astron=F3mico del Colegio Cristo Rey. Rosario, Argentina
Coordinator: V=EDctor =C1ngel Buso
Entre Rios 2974
CP. 2000 Rosario
ARGENTINA
ABSTRACT
We present data of a new suspected variable star in the constellation
Crux. This is a result of a photographic scanning program at the
Observatorio Cristo Rey, which began in 1995. Unfiltered CCD photometric
data show that IRAS12521-6034 is a variable star.
Star name: IRAS 12521-6034
Equatorial coordinates (field):
The star for which a change of brightness has been detected is:
AR (2000.0): 12h 55m 09.5s
Dec (2000.0): -60=BA 50' 59"
Cross references: IRAS 12521-6034.
Observatory and Telescope:
OBSERVATORIO ASTRONOMICO DEL COLEGIO CRISTO REY
In Rosario - Argentina.
Long: W 60 38 06.5
Lat: S 32 57 12.7
Alt: 50 Meters
* Refractor, 60 mm. diameter, 240 mm. focal lenght.
Detector:
* Meade's Pictor 416, filterless, with a Kodak's KAF-0400 CCD chip.
Pixel: 768 x 512, Size: 6.9mm x 4.60mm,Pixel Size: 7.73", Field view:
99=B4x 66=B4 (arcminute).
* Santa Barbara's SBIG ST-4, filterless, with a Texas Instruments'
TI-255 CCD chip. Pixel: 192 x 165, Size: 2.64mm x 2.64mm, Pixel Size:
11.75" x 13.66", Field
view: 37=B4x 37=B4(arcminute).
Date(s) of observation(s):
Differential magnitudes (DifMag) DifMag =3D MVar - MRef", where:
MRef: CCD Magnitude of the star SAO 252084 (CCD =3D SBIG ST4,
filterless)
MVar: Magnitude of the suspected (CCD =3D SBIG ST4, filterless)
Date(s) of observation(s):
BRIGHTNESS VARIATION OBSERVED
Measure with SBIG ST-4
Date Time Julian Instrumental
(UT) (UT) Date magnitude differences
-----------------------------------------------
1995 Mar 22 01:16 2449798.55307 1.22
1995 May 31 00:20 2449868.51418 1.42
1995 Jun 03 02:19 2449871.59682 1.52
1995 Jun 06 02:00 2449874.58362 1.51
1995 Jun 22 00:15 2449890.51024 1.81
1995 Jun 27 01:19 2449895.55469 2.01
1995 Jun 30 01:24 2449898.55816 2.39
1995 Jul 01 00:46 2449899.53188 2.14
1995 Jul 07 01:30 2449905.56274 2.25
1995 Jul 08 00:57 2449906.53951 2.01
1995 Jul 18 01:57 2449916.58164 2.44
1996 Ene 26 03:00 2450108.62522 >5.28
1996 Feb 27 04:08 2450140.67231 >5.28
1996 Abr 18 01:37 2450191.56789 >5.28
1996 May 21 01:37 2450224.56789 2.08
1996 Jun 22 02:04 2450256.58670 2.34
1996 Jul 04 23:22 2450269.47384 2.24
1996 Ago 10 01:53 2450305.57873 2.97
1997 Feb 14 03:45 2450493.65653 >5.28
1997 May 06 00:05 2450574.50355 >5.28
1997 May 29 00:35 2450597.52486 >5.28
1997 Jun 07 00:43 2450606.52994 >5.28
1998 Mar 25 02:58 2450897.62377 >5.28
1998 May 20 23:05 2450954.46227 >5.28
1999 Jun 11 01:01 2451340.54248 >5.28
1999 Ago 28 00:54 2451418.53814 >5.28
1999 Ago 29 00:56 2451419.53935 >5.28
Range of variability: 10.44 - > 14.50
BRIGHTNESS VARIATION OBSERVED
Measure with Pictor 416
Date Time Julian Instrumental
(UT) (UT) Date magnitude differences
2000 Oct 21 07:31 2451838.81340 7.37
2001 Feb 13 08:19 2451953.84656 8.51
2001 Feb 17 07:43 2451957.82203 8.63
2001 Feb 21 03:26 2451961.64339 8.63
2001 Feb 27 04:26 2451967.68491 7.98
2001 Mar 07 02:56 2451975.62289 >9.28
2001 Mar 14 05:28 2451982.72809 >9.28
2001 Mar 27 04:51 2451995.70225 >9.28
Range of variability: 10.44 - > 18.50 mag.
Comparison star(s):
SAO 252084 =3D HD 112027 =3D HIP 62982 =3D TYC 8989 3049 1. m=3D9.22V.
B-V=3D0.59
Check star(s):
SAO 252085 =3D HD 112026 =3D PPM 359736
HD 312129 =3D PPM 779212 =3D GSC 8989 1603
HD 312130 =3D GSC 8989 0710
CP -60 4360 =3D GSC 8989 1143
Transformed to a standard system: NO
if yes: which one:
standard stars (field) used:
Availability of the data (upon request, database, URL etc.)
If data are sent together with the template file, the editors will make
it publicly available through the
IBVS Web-site
http://ar.geocities.com/astrosud/new_suspected.htm
Type of variability (according to the GCVS nomenclature if known): I
(irregular)
Identification chart: YES
Remarks:
A scanning program for searching variable star is running at
Observatorio Cristo Rey. This program consist in taking CCD images of
the same field throughout the time and compare them to detect luminosity
changes in the stars in the field.
When a change of luminosity is detected, we cross references to the
following catalogues: General Catalogue of Variable Stars (GCVS), New
Suspected Variable Stars Catalogue and its supplement (NSV and NSVS),
Hipparcos Catalogue, Guide Star Catalogue, Tycho-1 and Tycho-2
catalogues, USNO Catalogue, IRAS and others.
As a result of this program we have found a variable star in Crux
(Southern Cross)at AR (2000.0): 12h 55m 09.5s Dec (2000.0): -60=BA 50'
59"
Return to Daisaku Nogami
vsnet-adm@kusastro.kyoto-u.ac.jp
VSNET Home Page