Author: cepheids

TCP J09370380+1657350 Photometry V/R/I

cepheids

Image:
Object: TCP J09370380+1657350
DATE-OBS: 2021-01-13T20:16:18
EXPTIME: 1200.0 (seconds) for V/R/I
SUBFRMS: 10
OBJCTRA: 09 37 03.80
OBJCTDEC: +16 57 35.00
Instrument:
Catalog: UCAC4/USNOB1
Bessell (B): +*.*, Bessell (V): +14.614
Bessell (R): +14.848, Bessell (I): +14.734
CCD: ATIK-383L+
FILTERS: V/R/I
TELESCOPE: C11, 1623.0mm
PRiSMv10, Astrometrica
Site:
ORIGIN: Cepheid Observatory, India, Vorion Scientific, India
SITELAT: +24:55:00:00
SITELONG:+75:33:58:99
Observers:
K.Vora, V.K.Agnihotri, B. Kumar, S. Mahawar,
Remark:
Sky Clear. V and R band magnitudes are estimated using UCAC4 catalog. I band magnitude is estimated using USNOB1 catalog.
End

V band JD 2459228.35160
R band JD 2459228.32211
I Band JD 2459228.33774

Sample Marked Image

TCP J09370380+1657350 Circled

JD mag Flt SNR ZeroPt Cat Design.

2459228.32211 14.848 R R 136.93 27.223 UCAC4 TCP
2459228.33774 14.734 I I 73.31 26.073 USNOB1 TCP
2459228.35160 14.614 V V 242.13 27.536 UCAC4 TCP
—– end —–

M38

cepheids

Remotely imaged by Kuldip Vora, from Ahmedabad, India.

Image:
Object: M38
DATE-OBS: 2021-01-12T13:34:45.691200
EXPTIME: 2400.00 (seconds)
SUBFRMS: 20
OBJCTRA: 05 28 42.693
OBJCTDEC: +05 28 42.693
Instrument:
Catalog: UCAC4
Bessell (B): +*.*, Bessell (V): +*.*
Bessell (R): +*.*, Bessell (I): +*.*
CCD: ATIK-383L+
FILTERS: R
TELESCOPE: C11, 1623.0mm
PRiSMv10, Astrometrica
Site:
ORIGIN: Cepheid Observatory, India, Vorion Scientific, India
SITELAT: +24:55:00:00
SITELONG:+75:33:58:99
Observers:
K.Vora, V.K.Agnihotri, B. Kumar, S. Mahawar,
Remark:
Sky Clear
End

The Pinwheel Galaxy M101

cepheids

The Pinwheel Galaxy (also known as Messier 101, M101 or NGC 5457) remotely imaged by Kuldip Vora, from Ahmedabad, India.

Image:
Object: M101
DATE-OBS: 2021-01-11T22:44:46.166400
EXPTIME: 2160.00 (seconds)
SUBFRMS: 120
OBJCTRA: 14 03 13.633
OBJCTDEC: +54 20 39.20
Instrument:
Catalog: UCAC4
Bessell (B): +*.*, Bessell (V): +*.*
Bessell (R): +7.76, Bessell (I): +*.*
CCD: ATIK-383L+
FILTERS: R
TELESCOPE: C11, 1623.0mm
PRiSMv10, Astrometrica
Site:
ORIGIN: Cepheid Observatory, India, Vorion Scientific, India
SITELAT: +24:55:00:00
SITELONG:+75:33:58:99
Observers:
K.Vora, V.K.Agnihotri, B. Kumar, S. Mahawar,
Remark:
Sky Foggy and Hazy
End

Pinwheel Galaxy/Messier 101/NGC 5457)

Comet 398P/Boattini

cepheids

Image:
Object: Comet 398P/Boattini
DATE-OBS: 2021-01-06T15:17:36
EXPTIME: 3600.00 (seconds)
SUBFRMS: 30
OBJCTRA: 04 53 19.101
OBJCTDEC: +03 14 12.738
Instrument:
Catalog: UCAC4
Bessell (B): +*.*, Bessell (V): +*.*
Bessell (R): +14.6, Bessell (I): +*.*
CCD: ATIK-383L+
FILTERS: R
TELESCOPE: C11, 1623.0mm
PRiSMv10, Astrometrica
Site:
ORIGIN: Cepheid Observatory, India, Vorion Scientific, India
SITELAT: +24:55:00:00
SITELONG:+75:33:58:99
Observers:
V.K.Agnihotri, B. Kumar,
S. Mahawar, K.Vora
Remark:
NIL
End

Bright Star Cluster GAIA DR3

cepheids

Our friend, Willie Buning, Netherlands, provided the Gaia DR3 data within 30 Kparsec for bright star clusters (Globular as well as open clusters). The table generated by the python code developed by Joseph Karpinski. Willie modified the code a bit for plotting dominated bright star clusters in SQL or Excel. The spectral classification of stars inside clusters and their numbers presented in map. The image of Gaia DR3 map is shown below.

Useful Links

cepheids

http://simbad.u-strasbg.fr/simbad/sim-fbasic

https://aladin.u-strasbg.fr/#AladinLite

https://www.raben.com/maps/

http://lucadavino.lahost.org/blog/static.php?page=polar_finder

https://www.stsci.edu/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/calspec

https://archive.stsci.edu/hlsps/reference-atlases/cdbs/current_calspec/

https://www.techspot.com/downloads/3689-adobe-photoshop-cs2.html

http://www.rochesterastronomy.org/snimages/

http://www.cbat.eps.harvard.edu/unconf/tocp.html

https://openphdguiding.org/development-snapshots/

https://hyperion-astronomy.com/downloads/

http://skytechx.eu/?page=download

http://var2.astro.cz/ETD/protocol.php

http://www.astronomy.ohio-state.edu/asassn/transients.html

https://www.wis-tns.org/

https://www.aavso.org/

https://ascom-standards.org/

https://www.atik-cameras.com/software-downloads/

https://www.sxccd.com/support/resources/

Best Spectrophotometric Standards

cepheids 
Best spectrophotometric standards:
                                      epoch  mu a cosd  mu d  Class   V Mag

LTT377         00 41 02.9  -33 44 06  1985                    f       11.2
Feige 24       02 32 30.9  +03 30 51  1950   +0.083   +0.010  DAwke   12.42
EG21           03 10 22.1  -68 39 28  1985                    DA      11.4 
G191B2B=EG247  05 01 31.5  +52 45 52  1950   +0.10    -0.0873 DAwk    11.78
GD71           05 49 34.79 +15 52 37  1950   +        -0.1898 DA1     13.03
LTT2415        05 56 24.2  -27 51 26  1985                            12.2
EG54           07 40 19.52 -17 24 41  2000  +1.136"/y -0.52"  DF      12.98 
LTT3218        08 41 33.6  -32 56 55  1985                    DA      11.8
EG63           08 47 29.6  -18 59 50  2000  -0.12"/y -0.05"/y DB      15.55
LTT3864        10 31 33.1  -35 33 03  1985                    f       12.1
Feige 34=EG71  10 36 41.1  +43 21 50  1950                    sdO     11.24
GD153          12 54 35.21 +22 18 09  1950            -0.1898 DA1     13.35
HZ 43 =EG98    13 14 00.7  +29 21 49  1950   -0.149   -0.0813 DAwk    12.91
HZ 44          13 21 19.1  +36 23 38  1950   -0.062   +0.031  sdO     11.67
EG274          16 23 33.7  -39 13 48  2000                    DA      11.0
LTT7379        18 36 26.2  -44 18 37  1985                    G0      10.2
HD 192281      20 10 46.8  +40 07 01  1950                    O5f      7.54
BD+284211=J256 21 48 57.1  +28 37 48  1950                    sdOp    10.56
LTT9239        22 52 40.88 -20 35 26  2000                    f       12.0
Feige110=EG158 23 17 23.5  -05 26 22  1950   +0.003   -0.003  sdO     11.88

OK standards:

Feige 25       02 36 00.0  +05 15 16  1950                    B6V     12.01
Hiltner 600    06 42 37.2  +02 11 25  1950                    B1V     10.42
Feige 56       12 04 13.8  +11 56 55  1950                    B5p     11.11
Feige 92       14 09 41.3  +50 21 07  1950                    Bp      11.62
BD+33 2642     15 50 02.9  +33 05 49  1950                    B2 IVp  10.88
BD+40 4032     20 06 40.0  +41 06 15  1950                    B2 III  10.45

The first set contains O stars without much Balmer absorption plus
faint southern standards from the list of Stone & Baldwin 1983, MN 204, 347.
The second set is mostly B stars that have a bit of Balmer absorption
and are usually OK.

from Link: https://www.cfa.harvard.edu/~dfabricant/huchra/standards.specp