J/A+AS/76/205 Variables and Nebulae in Sgr B (Terzan+ 1988)
A photometric study of the bright cloud B in Sagittarius. VI. 1592 new variable
stars and 30 diffuse objects.
Terzan A., Ounnas CH.
<Astron. Astrophys. Suppl. Ser. 76, 205 (1988)>
=1988A&AS...76..205T 1988A&AS...76..205T
ADC_Keywords: Stars, variable ; Nebulae
Keywords: Variable stars - diffuse objects
Summary:
1592 new variable stars and 30 diffuse objects have been detected on
B, V and R plates obtained at the Schmidt telescopes of Mount Palomar
Observatory (1968) and the European Southern Observatory (1976-1983).
After detection, photometry (Observatoire de Lyon) and astrometric
measurement (ESO/Garching) of these objects, we have determined the
parameters R.A., D, l, b, R {Max}, R {Min}, A. We have established
that :
1) Among the 30 diffuse objects: 4 appear in the form of a nebulosity;
1 is a star surrounded by a nebulosity; 4 are suspected of being
planetary nebulae; 21 others seem to be galaxies or galaxy nuclei,
belonging in all probability to the Ophiuchus cluster.
2) Among the 1592 variable stars: 1 is an IR variable (No 1593); 332
are observable only on R plates; 1221 are found on B and V plates;
296 have an observed amplitude together between 2.1 and 3.0 mg
(histogram dm/N); the number of variable stars decreases rapidly
towards the high amplitudes ; the surface density of variable stars
per square degree in this direction towards the centre of the Galaxy
increases from 1.05 to 31 in the two explored fields, each of which
covers an area of 5.5 x 5.5.
3) Star No 856 is a proper motion star.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 67 149 Diffuse objects, nebulosity, PN
(known or suspected)
table4.dat 96 1656 The Catalogue of Variable stars
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See also:
J/A+AS/49/715 : (621 variables)
J/A+AS/90/451 : (1165 variables and 65 diffuse objects)
J/A+AS/123/507 : (1061 variables)
Table 2: Known objects in the fields A and D.
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OPEN GALACTIC CLUSTERS
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C1723-346 Lauberts 17 23 33 -34 38 7 Class 112
C1724-407 Lauberts 17 24 26 -40 40.9 OC?
C1725-294 Trumpler 26 17 25 22 -29 27.2
C1725-315 Antalova 1 17 25 6 -31 32
C1726-324 Antolova 2 17 26 4 -32 28
C1728-340 Collinder 333 17 28 13 -33 59.1
C1728-318 VDE-Hagen 231 17 28 6 -31 52
C1729-325 NGC 6374 17 28 59 -32 33.7
C1730-293 Terzan-Ju 20 17 30 4 -29 17 OC?
C1731-325 NGC 6383 17 31 27 -32 33.0
C1731-342 Ruprecht 126 17 31 42 -34 14.1
C1732-334 Trumpler 27 17 33 02 -33 28.7
C1733-335 Lauberts 17 33 02 -33 28.7
C1734-349 NGC 6396 17 34 16 -34 59 8
C1736-332 NGC 6404 17 36 20 -33 13.2
C1736-321 NGC 6405 17 37 05 -32 13.7
C1740-342 Lauberts 17 40 14 -34 11.8 Class 1113
C1740-348 Ruprecht 128 17 40 58 -34 51.6
C1741-323 NGC 6416 17 41 04 -32 20.4
C1741-337 Collinder 345 17 41 18 -33 44.0
C1743-296 VDB-Hagen 245 17 43 04 -29 41.1
C1743-315 NGC 6425 17 43 47 -31 30.7
C1744-301 Ruprecht 130 17 44 20 -30 04.5
C1746-348 Ruprecht 132 17 46 15 -34 48 3 NGC 6444?
C1747-302 NGC 6451 17 47 29 -30 11 7
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GLOBULAR CLUSTERS
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C1707-265 NGC 6293 17 07 03 -26 31.2
C1708-271 Terzan-Ju 5 17 08 1 -27 08
C1709-251 Terzan 33 17 09 32 -25 03.2
C1710-250 Terzan 34 17 10 11 -24 58.9
C1711-248 Terzan 35 17 10 58 -24 45.5 or Planetary?
C1711-294 NGC 6304 17 11 21 -29 24.3
C1713-280 NGC 6316 17 13 28 -28 05.1
C1715-262 Terzan-Ju 15 17 15 3 -26 15
C1715-277 Terzan-Ju 16 17 15 0 -27 43.2
C1715-278 Terzan-Ju 17 17 15 5 -27 47
C1720-263 NGC 6355 17 20 9 -26 18.4
C1724-307 Terzan 2 17 24 20 -30 45.7
C1727-315 Terzan 4 17 27 24 -31 33.0
C1727-299 Dufay-OHP 1 17 27 53 -29 56.8
C1728-338 Grindlay 1 17 28 7 -33 48
C1730-333 Liller 1 17 30 0 -33 21
C1732-104 Terzan 1 17 32 34 -30 27.0
C1741-328 Terzan-Ju 23 17 41 8 -32 45
C1744-330 Djorgovski 1 17 44 2 -33 03
C1747 313 Terzan 6 17 47 17 -31 18.7
C1748-346 NGC 6453 17 47 32 -34 35.1
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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3- 4 I2 h RAh Right Ascension 1950 (hours)
6- 7 I2 min RAm Right Ascension 1950 (minutes)
9- 10 I2 s RAs Right Ascension 1950 (seconds)
13 A1 --- DE- Declination 1950 (sign)
14- 15 I2 deg DEd Declination 1950 (degrees)
17- 20 F4.1 arcmin DEm Declination 1950 (minutes)
23- 36 A14 --- Name Designation of the diffuse object
39- 67 A29 --- Nature Explanations
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- TerzV ? [622/2213]+ Runnning Number
6- 8 I3 --- T66b ? Number previously allocated by Terzan
(1966JO.....49..258T 1966JO.....49..258T) to 421 variable stars
detected on IR plates
10- 11 I2 h RAh Right Ascension 1950 (hours)
13- 14 I2 min RAm Right Ascension 1950 (minutes)
16- 19 F4.1 s RAs Right Ascension 1950 (seconds)
22 A1 - DE- Declination 1950 (sign)
23- 24 I2 deg DEd Declination 1950 (degrees)
26- 27 I2 arcmin DEm Declination 1950 (minutes)
29- 32 F4.1 arcsec DEs Declination 1950 (seconds)
36- 40 F5.1 deg GLON Galactic longitude
43- 47 F5.1 deg GLAT Galactic latitude
49 A1 --- l_R(max) [<>] Limit flag on R(max)
50- 53 F4.1 mag R(max) Red magnitude at Maximum
54 A1 --- u_R(max) [:] for inaccurate R(max) value.
57- 58 I2 --- r_R(max) ? Index of plate in table 1
60 A1 --- l_R(min) [>] when R(min) is a lower value
61- 64 F4.1 mag R(min) ? Red magnitude at minimum
65 A1 --- u_R(min) [:] for inaccurate R(min) value.
68- 69 I2 --- r_R(min) ? Index of plate in table 1
71 A1 --- l_A [<] limit flag on A
72- 74 F3.1 mag A ? Observed magnitude amplitude
78- 96 A19 --- Remarks Other name;
B or V indicate a brightness variation
on the B and/or V plates
other remarks: see the paper
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History: From scanned article
* 14-Feb-2000: Some TerzV numbers were corrected, in table 4.
* 08-Dec-2020: Misprint in coordinates of Terz V 624 corrected in Table 4.
* 25-Jan-2021: Misprint in coordinates of Terz V 640, 643 and 645
corrected in Table 4.
(End) M.J. Wagner, Francois Ochsenbein [CDS] 27-Jul-1993