Sintez telescope modernization

History

MODERNIZATION

Scientific tasks
AGN photometry
Stars photometry
GRB photometry
Exoplanets transits photometry
Search and monitoring programs
Applied tasks
New devices testing
Creation of remote and automatic control systems
Web-based control system creation

Common parameters
New main mirror diameter about 1m
Focal distance 3m
Field of view about 1-2 deg
Limiting magnitude:
White light 21-23m
Photometry in filters 20m
Spectral observations 15-18m

Small telescope
Newton reflector 350mm/1765, guide 50/183mm
Main camera QHY9 guide camera QHY5L-II M
electric focus
Filter wheel 7х1.25” C-B-V-R-I-OIII-Ha

WEB-control

WEB-control
http://sintez.alex13.ru

Control system

Control system

OBSERVATIONS

As we observe with a telescope
Open the roof and power on the mount (manual)
Unpark the telescope and point to the object (NINA automatic)
Astrometry of the first frame (NINA automatic).
Synchronization of the telescope with the obtained coordinates (NINA automatic)
Sharp pointing to the object (NINA automatic)
Turn on autoguide (PhD2 automatic)
Get the series of frames of the object (NINA automatic)
Point the telescope to the next object (NINA automatic)
Park telescope and warm camera (NINA automatic)
Close the roof (industrial controller OVEN)

First light
December 2020
350/1767mm
Camera QHY-9S M
Resolution 0,63”/px

Photometric error
may 2021
350/1767mm
Camera QHY-9S M
Filter B, 60s

may 2021
350/1767mm
Camera QHY-9S M
Filter V, 600s
Photometric error

GRB 210610B
Date UT-start t-T0 Exp Filter OT Err UL(3sig) Obs. Telescope
2021-06-10 22:07:10 0.10293 5*300 R 17.20 0.03 20.5 CrAO Newton-0.35
2021-06-10 22:41:13 0.12658 5*300 R 17.28 0.08 21.1 CrAO Newton-0.35
2021-06-10 23:06:26 0.14409 5*300 R 17.28 0.06 21.1 CrAO Newton-0.35
2021-06-10 23:31:38 0.16159 5*300 R 17.29 0.06 21.1 CrAO Newton-0.35
2021-06-11 20:22:38 1.02165 8*300 R 19.58 0.10 21.2 CrAO Newton-0.35
2021-06-11 20:50:32 1.04103 6*300 R 19.50 0.09 21.2 CrAO Newton-0.35
2021-06-11 21:33:21 1.07077 17*300 R 19.69 0.09 21.5 CrAO Newton-0.35
2021-06-12 20:39:03 2.03479 14*300 R 20.57 0.189 21.5 CrAO Newton-0.35
2021-06-13 19:38:28 3.02571 20*300 R 21.26 0.173 21.8 CrAO Newton-0.35

GRB 210610B

Astrometric monitoring
Our first science aim in autumn 2020 was astrometric monitoring Uranus and Neptune satellites together with Pulkovo observatory. Main camera is QHY-9 with sensor KAF 8300M, pixel size 5.4 mkm, scale 630 mas/pix, field of view 35×26’, typical exposure 45 sec. Total number of observations is 170 for Neptune and 500 for Uranus (october - december 2020).
Limiting magnitude was 19m, astrometric errors not more 50mas.

On the night of march 11-12, 2021 we observe the antisolar point (opposite sun point). Exposures about 300 sec, unfiltered, bin 2x.
Image processing: MaxlmDl, IzmCCD, Mathlab. 10 known objects found and one unknown.
We get new frames of march 15, send astrometry to MPC and get the registration of the new asteroid 2021 EP5.
New asteroid discovery

Asteroid discovery soft
Calibration (dark, flat, bias applying)
Astrometric solution (local astrometry.net solver)
Images alignment (rotation, offset, polynomial transform)
Background fitering (median and sigma-clipping)
Stacking. Fast-moving object removing (satellites and so). Good image of stars as a result.
Removing stars (from stacking pass) from all images
Partial averaging (if there are too many images to process in one time)
Calculation many sums of all images with different offsets. Offset adjusting. Determining possible asteroid-candidates.
Selection of brightest candidates. Calculating SNR, Coordinates, Speed. Summing images with calculated offset.
Known objects identification. Exporting results.

AGN observations
In summer 2021 we started monitoring of BL Lac together with SPbSU. Total number of frames >900 (august - september 2021)

Our results
Mount, roof and sensors restored
350mm telescope put into operation
Control system created
Photometric errors are defined
Scientific observations organized
Unknown asteroid discoveried

Our results
Mount, roof and sensors restored
350mm telescope put into operation
Control system created
Photometric errors are defined
Scientific observations organized
Unknown asteroid discoveried
Our plans
Full automation of the observations
Web-based telescope control
New camera and 2” filters
Manufacturing and installation of a meter main mirror