Amateur PN discoveries and their spectral confirmation: A significant new addition to the Galactic PN inventory

Dû, Pascal Le; Mulato, Lionel; Parker, Quentin A.; Petit, Thomas; Ritter, Andreas; Drechsler, Marcel; Strottner, Xavier; Patchick, D.; Prestgard, T.; Garde, O.; Outters, Nicolas; Raffaelli, T.

doi:10.1051/0004-6361/202243393

Cited by 12 publications

(1 citation statement)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Astronomy is one of the sciences in which non-professionals have a major role to play. By the end of this decade, 209 galactic planetary nebulae had been discovered by a group of French amateur astronomers in collaboration with professional astronomers, adding significantly to the planetary nebula database [1]. In addition, there are several papers that discuss the role of amateur astronomers and the general public in the development of astronomy [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Developing and Testing a Cooling System for CMOS in DSLR to Minimize Noise in Astronomical Image and Incorporating a Sky Quality Meter

Syahputra,

Nuryanto,

Iskak

2024

Preprint

View full text Add to dashboard Cite

To capture faint astronomical images effectively, commercial camera like Digital Single-lens reflects (DSLR) require operation at low temperatures to minimize dark current noise. To achieve this, a cooling system utilizing Thermoelectric Cooler (TEC) technology is devised. This cooling apparatus is regulated by a microcontroller employing digital PID control. The design process for the cooler and its fan is conducted via computational fluid dynamics (CFD) simulations. Real-time temperature data is acquired using a temperature sensor affixed to the rear of the camera sensor. This data serves as input for the digital PID control algorithm, with the calculated PID results then applied to the PWM controller linked to the TEC. Consequently, the camera sensor temperature is effectively lowered in accordance with the specified target temperature. Apart from that, a sky quality meter is also installed on the device to measure the brightness of the night sky. By integrating the sky quality meter with the DSLR, researchers can obtain additional data in the form of sky brightness, which will be very useful in analyzing and interpreting astronomical images. In this paper, a DSLR camera cooling system integrated with a sky quality meter will be designed, tested and discussed in detail.

show abstract

Section: Introductionmentioning

confidence: 99%

Developing and Testing a Cooling System for CMOS in DSLR to Minimize Noise in Astronomical Image and Incorporating a Sky Quality Meter

Syahputra,

Nuryanto,

Iskak

2024

Preprint

View full text Add to dashboard Cite

show abstract

DeGaPe 35: Amateur discovery of a new southern symbiotic star

Petit¹,

Merc²,

Gális³

et al. 2023

New Astronomy

View full text Add to dashboard Cite

Euclid preparation

Paterson¹,

Schirmer²,

Y.³

2023

A&A

View full text Add to dashboard Cite

The Euclid mission will conduct an extragalactic survey over 15 000 deg2 of the extragalactic sky. The spectroscopic channel of the Near-Infrared Spectrometer and Photometer (NISP) has a resolution of R ~ 450 for its blue and red grisms that collectively cover the 0.93–1.89 µm range. NISP will obtain spectroscopic redshifts for 3 × 107 galaxies for the experiments on galaxy clustering, baryonic acoustic oscillations, and redshift space distortion. The wavelength calibration must be accurate within 5 Å to avoid systematics in the redshifts and downstream cosmological parameters. The NISP pre-flight dispersion laws for the grisms were obtained on the ground using a Fabry-Perot etalon. Launch vibrations, zero gravity conditions, and thermal stabilisation may alter these dispersion laws, requiring an in-flight recalibration. To this end, we use the emission lines in the spectra of compact planetary nebulae (PNe), which were selected from a PN database. To ensure completeness of the PN sample, we developed a novel technique to identify compact and strong line emitters in Gaia spectroscopic data using the Gaia spectra shape coefficients. We obtained VLT/X-shooter spectra from 0.3 to 2.5 µm for 19 PNe in excellent seeing conditions and a wide slit, mimicking Euclid’s slitless spectroscopy mode but with a ten times higher spectral resolution. Additional observations of one northern PN were obtained in the 0.80–1.90 µm range with the GMOS and GNIRS instruments at the Gemini North Observatory. The collected spectra were combined into an atlas of heliocentric vacuum wavelengths with a joint statistical and systematic accuracy of 0.1 Å in the optical and 0.3 Å in the near-infrared. The wavelength atlas and the related 1D and 2D spectra are made publicly available.

show abstract

Amateur PN discoveries and their spectral confirmation: A significant new addition to the Galactic PN inventory

Cited by 12 publications

References 26 publications

Developing and Testing a Cooling System for CMOS in DSLR to Minimize Noise in Astronomical Image and Incorporating a Sky Quality Meter

Developing and Testing a Cooling System for CMOS in DSLR to Minimize Noise in Astronomical Image and Incorporating a Sky Quality Meter

DeGaPe 35: Amateur discovery of a new southern symbiotic star

Euclid preparation

Contact Info

Product

Resources

About