J/A+A/403/247 Variability in the ROSAT All-Sky Survey (Fuhrmeister+, 2003)
A systematic study of X-ray variability in the ROSAT All-Sky Survey.
Fuhrmeister, B., Schmitt, J.H.M.M.
<Astron. Astrophys. 403, 247 (2003)>
=2003A&A...403..247F 2003A&A...403..247F
ADC_Keywords: X-ray sources ; Photometry, UBV ; Cross identifications
Keywords: surveys - X-rays: general - stars: activity - stars: flares
Description:
We present a systematic search for variability among the ROSAT All-Sky
Survey (RASS) X-ray sources. We generated lightcurves for about
30000 X-ray point sources detected sufficiently high above
background. For our variability study different search algorithms were
developed in order to recognize flares, periods and trends,
respectively. The variable X-ray sources were optically identified
with counterparts in the SIMBAD, the USNO-A2.0 and NED data bases, but
a significant part of the X-ray sources remains without cataloged
optical counterparts. A complete list of the 1207 variable sources we
found is presented here.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table7.dat 120 1207 Catalog of variable sources found in the ROSAT
All-Sky Survey
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See also:
IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999)
IX/29 : ROSAT All-Sky Survey Faint Source Catalog (Voges+ 2000)
I/252 : The USNO-A2.0 Catalogue (Monet+ 1998)
Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- Seq Sequential number of source
6- 7 I2 h RAh X-ray right ascension (J2000)
9- 10 I2 min RAm X-ray right ascension (J2000)
12- 16 F5.2 s RAs X-ray right ascension (J2000)
18 A1 --- DE- X-ray declination sign (J2000)
19- 20 I2 deg DEd X-ray declination (J2000)
22- 23 I2 arcmin DEm X-ray declination (J2000)
25- 28 F4.1 arcsec DEs X-ray declination (J2000)
30 I1 --- flare [0/1] Flare flag
32 I1 --- aflare [0/1] Flare flag (automatically found)
34 I1 --- fper [0/1] Period flag
36 I1 --- afper [0/1] Period flag (automatically found)
38 I1 --- trend [0/1] Trend flag
40 I1 --- atrend [0/1] Trend flag (automatically found)
42- 46 A5 --- Type Type of source (1)
47 A1 --- n_Type [UNX] Note on Type (2)
48- 77 A30 --- Name Identifier of the source (3)
79- 84 F6.3 --- Bmag ?=0.0 B magnitude from USNO-A2.0, Cat. I/252
87- 92 F6.3 --- Vmag ?=0.0 V magnitude from USNO-A2.0, Cat. I/252
94-119 A26 --- Remarks Remarks on source
120 A1 --- n_Name [C] C: data corrected by CDS (4)
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Note (1): Spectral type or morphological type:
BLL: BL Lac object
IR: Infrared source
LXB: Low-mass X-ray binary
WD: White dwarf
AGN: Active galactic nuclei
SNR: Supernova remnant
QSO: Quasar
Sy1: Seyfert type 1 galaxy
Sy2: Seyfert type 2 galaxy
bla: Blazar
gal: Galaxy
rad: Radio source
star: Star
Note (2): Remarks on source:
last character U : object was identified by the USNO-A2.0 catalog
last character N : object was identified by NED
X : X-ray object (no optical counterpart found)
Note (3): NuID : no unique identification possible
Note (4): On 29-Jan-2004, some source identifications were corrected by CDS.
0558: K U 1RXS J102149.7-415850
corrected into NuID
0566: K U 1RXS J104346.6+223006
corrected into NuID
0567: Sy1 RBS 901 0.0 17.5
corrected into K U 1RXS J104346.6+223006 0.0 0.0
0568: K0 V* EK UMa 18.0 18.0 cataclysmic var.
corrected into Sy1 RBS 901 0.0 0.0
0571: K0 V* DM UMa 10.31 9.31 RS CVn star
corrected into NuID 0.0 0.0
0572: G5V GSC 06643-01097 11.15 10.49
corrected into K0 V* DM UMa 10.31 9.31 RS CVn star
0573: star RBS 928 0.0 0.0
corrected into G5V GSC 06643-01097 11.15 10.49
0576: star V* AN UMa 15.5 15.5 DA
corrected into NuID 0.0 0.0
0599: M4.5e 1RXS J113523.0-191321 0.0 0.0
corrected into NuID 0.0 0.0
1077: A U 1RXS J145307.8+380319 0.0 0.0
corrected into NuID 0.0 0.0
1130: star U 1RXS J213619.0-444350 0.0 0.0
corrected into NuID 0.0 0.0
1131: NuID 0.0 0.0
corrected into star U 1RXS J213619.0-444350 0.0 0.0
1154: V* FQ Aqr corrected into V* FO Aqr
1190: 219213 corrected into HD 219113
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History: 29-Jan-2004: Some sources identifications corrected (see Note (4))
Acknowledgements: Birgit Fuhrmeister
(End) Patricia Bauer [CDS] 06-Mar-2003