J/AJ/112/2020 UBV Photometry of globular cluster NGC1841 (Alcaino+ 1996)
NTT photometry in UBV of the distant globular cluster NGC 1841.
Alcaino G., Liller W., Alvarado F., Kravtsov V., Ipatov A.,
Samus N., Smirnov O.
<Astron. J. 112, 2020 (1996)>
=1996AJ....112.2020A 1996AJ....112.2020A (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, globular ; Photometry, CCD
Description:
The observations were acquired in two nights, 1993 December 20-22,
with the EMMI camera on the NTT telescope at ESO.
The photometric limit is close to the cluster main-sequence turnoff;
a comparison of the photometry with Walker (1990AJ....100.1532W 1990AJ....100.1532W)
shows slight systematic differences . the present magnitudes being
fainter by 0.03-0.05mag, and colors being bluer by 0.05mag.
The estimated parameters of the populous globular cluster NGC 1841,
located approximately 15deg from each of the Magellanic Clouds and
probably dynamically associated with the LMC, are:
[Fe/H] = -2.0 ± 0.15
E(B-V) = 0.17 ± 0.03 mag
(m-M)0 = 18.26 ± 0.11 mag (true distance modulus)
Objects:
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RA (2000) DE Designation(s)
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04 45 10 -83 59.7 NGC 1841 = ESO 4-15 = C 0444+840
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3 43 1347 The stars with photometry
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See also:
J/PASP/104/1063 : BV Color-Magnitude Diagram for NGC 1851 (Walker 1992)
J/AJ/105/527 : RR Lyr stars in NGC 1835 (Walker 1993)
Byte-by-byte Description of file: table3
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Bytes Format Units Label Explanations
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2- 5 I4 --- Seq [1/1347]+ Running number
7- 14 F8.3 pix x *coordinate
16- 22 F7.3 pix y *coordinate
24- 29 F6.3 mag Vmag V magnitude
31- 36 F6.3 mag B-V B-V color
38- 43 F6.3 mag U-B ? U-B color
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Note on x, y:
the pixel size is approximately 0.36arcsec/pix ; x is along RA and
increases to the East; y is along Dec and increases to the South.
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Acknowledgements:
Nikolai Samus
(End) Francois Ochsenbein [CDS] 02-Jan-1997