NGC 6946 & NGC 6939
Fireworks Galaxy and the Ghost Bush Cluster
- CAMERA QHY183M
- EXPOSURE 11h48min
FILTERS: Optlong L-Pro/Blue 1.25″ / Green 1.25″ /1.25″
DATES:June 18 to June 26, 2021
|Resolution||1.3mega pixel||0.4mega pixel|
|Response Wavelength||0.4um – 1.7um|
|Shutter Type||Global Shutter|
|DC 5V 5-meter/10-meter USB3.0 Active Extension Cable||$35 (5-meter) $45 (10-meter)|
*Shipment Expenses，Customs or Other Taxes are NOT Included in Reference Prices
QHY990/991 is the scientific cooled short wavelength infrared camera. with Sony IMX990 / IMX991 InGaAs sensor with a square 5um*5um pixel array and 1.31M / 0.4mega effective pixels. This chip has a wide waveband(0.4um-1.7um) with high sensitivity. QE is up to 77% at 1200nm.
By using the Cu-Cu interconnect technology, the sensor has very low FPN noise and a low defect pixel ratio.
Both QHY990 and QHY991 include a 25mm filter holder. 25mm filter is a very common filter type for lab applications. The SWIR filter is easy to be installed inside the camera. With this adapter, the camera still meets the 17.5mm C-mount B.F.L.
QHY990 and QHY991 have both air cooling and liquid cooling version. The air cooling can get the -35C below ambient. The liquid cooling version can get -45C below ambient with normal temperature liquid and can get -60 to -80C below ambient with cold liquid. Typically the InGaAs sensor has a high dark current than Silicon-based material. If you are doing the long exposure with this camera (eg. exposure >5 sec) QHYCCD recommends selecting the liquid cooling version.
Applications: SWIR Astronomy Imaging and Photometry, Daytime Star Observing, Optical Communication, Laser, Optic Labs.
|CMOS Sensor||IMX990 SWIR Sensor||IMX991 SWIR Sensor|
(includes optic black pixels)
|Effective Pixel Area||1296*1032||656*520|
|Effective Pixels||1.3 Megapixels||0.4 Megapixels|
|Effective Image Area||1/2 inch||1/4 inch|
|AD Sample Depth||12-bit A/D|
|Shutter Type||Electric Global Shutter|
|QE||77% @ 1200nm|
|Full Well||Typical 120ke|
|Readout Noise||The measured data is after Bias Frame FPN calibration|
Typical 150 e- at lowest gain
|Frame Rate||66FPS@Full Resolution 12bit|
|133FPS @ Full resolution 12bit|
254FPS @ 240Line 12bit
|Trig Function||One Hardware Trig-In Socket (RCA type).Opto-isolated|
|Telescope Interface||1.25inch Adapter|
|Basic Interface||Flange with 6-M3 screw holes|
|25mm Filter Adapter||Support D=25mm and D=25.4mm filter|
|Back Focal Length||C_Mount,1.25inch adapter|
17.5mm with 25mm filter adapter, 14.5mm without filter adapter
|Cooling System||Dual Stage TE Cooler|
Air Cooling version
Liquid Cooling version