Search found 123 matches

by alexhuangyan
Mon Mar 18, 2024 3:09 am
Forum: This is SolarChat !!
Topic: Closeups of Group 3599 in Ha and Ca-k
Replies: 17
Views: 559

Re: Closeups of Group 3599 in Ha and Ca-k

These are excellent!
by alexhuangyan
Mon Mar 18, 2024 3:06 am
Forum: This is SolarChat !!
Topic: FD images taken on March 7, from 540 nm to Ca K / Alluxa and Altair filters
Replies: 17
Views: 527

Re: FD images taken on March 7, from 540 nm to Ca K / Alluxa and Altair filters

The image is great!
1、Alluxa 0.14 nm + 0.37 nm image K1 or K2?
2、How much bandwidth is required to see CAK Fibers on that disk?
Thank you for your reply!
by alexhuangyan
Wed Mar 06, 2024 10:56 pm
Forum: SPoD Archive
Topic: 3.3 Sol'Ex Spectroheliograph CAK/HA QUARK CAH/HA
Replies: 15
Views: 258

Re: 3.3 Sol'Ex Spectroheliograph CAK/HA QUARK CAH/HA

astroshot wrote: Wed Mar 06, 2024 1:06 pm That's very good Alex.
How are you getting such a smooth edge to your Sol'ex solar disc?
I don't have much experience with spectrometer photography; Used for less than a month.

Single frame shooting, sunny weather, low gain and exposure, will the image improve?
by alexhuangyan
Wed Mar 06, 2024 10:55 pm
Forum: SPoD Archive
Topic: 3.3 Sol'Ex Spectroheliograph CAK/HA QUARK CAH/HA
Replies: 15
Views: 258

Re: 3.3 Sol'Ex Spectroheliograph CAK/HA QUARK CAH/HA

Thank you all for your appreciation!
@Dennis,szzj369,ffellah ,rigel123,DeepSolar64,pedro,WMoore,MAURITS ,marktownley,TareqPhoto,astroshot。
by alexhuangyan
Mon Mar 04, 2024 8:22 am
Forum: SPoD Archive
Topic: 3.3 Sol'Ex Spectroheliograph CAK/HA QUARK CAH/HA
Replies: 15
Views: 258

3.3 Sol'Ex Spectroheliograph CAK/HA QUARK CAH/HA

Sol'Ex Spectroheliograph CAK 3933.7Å FWHM≈0.15Å
K3 LINE Upper chromosphere 1500-2000KM;
Sol'Ex Spectroheliograph Ha
6562.8 FWHM≈0.15Å;
Daystar Quark CAH 3968.5 Å FWHM5Å
Lower chromosphere ≈500KM;
Daystar Quark Ha 6562.8Å FWHM≈1Å
by alexhuangyan
Mon Mar 04, 2024 8:22 am
Forum: This is SolarChat !!
Topic: 3.3 Sol'Ex Spectroheliograph CAK/HA QUARK CAH/HA
Replies: 11
Views: 348

3.3 Sol'Ex Spectroheliograph CAK/HA QUARK CAH/HA

Sol'Ex Spectroheliograph CAK 3933.7Å FWHM≈0.15Å
K3 LINE Upper chromosphere 1500-2000KM;
Sol'Ex Spectroheliograph Ha
6562.8 FWHM≈0.15Å;
Daystar Quark CAH 3968.5 Å FWHM5Å
Lower chromosphere ≈500KM;
Daystar Quark Ha 6562.8Å FWHM≈1Å
by alexhuangyan
Thu Jan 18, 2024 12:52 am
Forum: Solar Scope Modifications
Topic: Question about QUARK CAH bandwidth?
Replies: 11
Views: 541

Re: Question about QUARK CAH bandwidth?

marktownley wrote: Wed Jan 17, 2024 7:58 pm
alexhuangyan wrote: Wed Jan 17, 2024 3:10 pm
Dennis wrote: Wed Jan 17, 2024 10:30 am Since it is a 5A filter it will remain at 5A at its best i would say.
The mica design is 5A, so F>48, the bandwidth is the same, right?

Thank you!
Is it definitely a mica etalon? Do we know this for sure?
White paper introduces mica materials;
by alexhuangyan
Wed Jan 17, 2024 3:10 pm
Forum: Solar Scope Modifications
Topic: Question about QUARK CAH bandwidth?
Replies: 11
Views: 541

Re: Question about QUARK CAH bandwidth?

Dennis wrote: Wed Jan 17, 2024 10:30 am Since it is a 5A filter it will remain at 5A at its best i would say.
The mica design is 5A, so F>48, the bandwidth is the same, right?

Thank you!
by alexhuangyan
Wed Jan 17, 2024 3:07 pm
Forum: Solar Scope Modifications
Topic: Question about QUARK CAH bandwidth?
Replies: 11
Views: 541

Re: Question about QUARK CAH bandwidth?

I am sorry to say this curve from DayStar white paper is completely wrong. It is impossible to have a material (mica, fused silica, or whatever) giving a curve like this. The best possible fit is to have an index of 1.96 for the etalon gap, which is very far from the 1.65 index of mica. See more in...
by alexhuangyan
Wed Jan 17, 2024 8:06 am
Forum: Solar Scope Modifications
Topic: Question about QUARK CAH bandwidth?
Replies: 11
Views: 541

Question about QUARK CAH bandwidth?

Hello everyone:
The QUARK CAH manual mentions a focal ratio>=7 and a bandwidth of 5A; The white paper mentions the relationship between focal ratio and bandwidth;
When the working focal ratio F36-F48 (>F30), what is the approximate bandwidth of QUARK CAH?
Thank you for your reply!
by alexhuangyan
Thu Jan 11, 2024 3:25 am
Forum: This is SolarChat !!
Topic: Antlia 200ERF+GSO CC8 2023.12.7 four Wavelength mosaic image of AR13505&13508&13510&13511
Replies: 9
Views: 501

Antlia 200ERF+GSO CC8 2023.12.7 four Wavelength mosaic image of AR13505&13508&13510&13511

4 Wavelength mosaic image of AR13505&13508&13510&13511 Antlia Duo-Band200ERF+GSO CC8
by alexhuangyan
Fri Dec 15, 2023 6:39 am
Forum: This is SolarChat !!
Topic: HR Ca K images with single/double/triple stack Alluxa Ca K filters and top seeing / 29 sept
Replies: 30
Views: 2199

Re: HR Ca K images with single/double/triple stack Ca K Alluxa filters and top seeing / 29 sept

Dear Christian Villarich:

The image is great!
Seeing your single/double filter comparison chart, it indicates that CAK,CAH Spices on the disk have been detected. What is the required filter bandwidth< 1A, can a single filter be used?
Thank you for your reply

Alex
by alexhuangyan
Fri Dec 15, 2023 6:08 am
Forum: This is SolarChat !!
Topic: Unprocessed Alluxa CAK Stacked 16bit Files - For you to play at processing
Replies: 26
Views: 2118

Re: Unprocessed Alluxa CAK Stacked Files - For you to play at processing

Dear Yltansg

Finally, the astrob. in image can be seen,
Is CR6 full caliber or reduced caliber occlusion? What is the bandwidth of Alluxa?
Thank you for your reply.

Alex
by alexhuangyan
Wed Dec 13, 2023 12:28 pm
Forum: This is SolarChat !!
Topic: 393,WL,CAK,HA 12.7 mosaic image Sunspot Photosphere /Chromospherer
Replies: 9
Views: 738

Re: 393,WL,CAK,HA 12.7 mosaic image Sunspot Photosphere /Chromospherer

Sunspot Fulldisk Photosphere /Chromospherer Dec 7, 2023
Baader AstroSolar3.8 /2047 D50F270/QUARK Ha&CAH
Alexhy Shanghai
by alexhuangyan
Wed Dec 13, 2023 12:26 pm
Forum: This is SolarChat !!
Topic: 393,WL,CAK,HA 12.7 mosaic image Sunspot Photosphere /Chromospherer
Replies: 9
Views: 738

Re: 393,WL,CAK,HA 12.7 mosaic image Sunspot Photosphere /Chromospherer

Sunspot Photosphere /Chromospherer
wavelength mosaic image of AR13505&13508&13510&13511, Dec 7, 2023
Antlia Duo-Band200ERF+GSO CC8
Alexhy Shanghai
by alexhuangyan
Wed Dec 13, 2023 12:25 pm
Forum: This is SolarChat !!
Topic: 393,WL,CAK,HA 12.7 mosaic image Sunspot Photosphere /Chromospherer
Replies: 9
Views: 738

393,WL,CAK,HA 12.7 mosaic image Sunspot Photosphere /Chromospherer

Sunspot Photosphere /Chromospherer
wavelength mosaic image of AR13507, Dec 7, 2023
Antlia Duo-Band200ERF+GSO CC8
Alexhy Shanghai
by alexhuangyan
Wed Dec 13, 2023 12:21 pm
Forum: This is SolarChat !!
Topic: Testing CAK Alluxa Filters - 13 Dec Singapore
Replies: 12
Views: 626

Re: Testing CAK Alluxa Filters - 13 Dec Singapore

Hello, have you uploaded the pictures to the forum? It's strange, I can't see the pictures you sent in Shanghai.
by alexhuangyan
Sat Dec 09, 2023 12:53 pm
Forum: This is SolarChat !!
Topic: 2023.12.7 CC8ERF AR3507*AR3511 CAH&HA high resolution
Replies: 7
Views: 545

Re: 2023.12.7 CC8ERF AR3507*AR3511 CAH&HA high resolution

yltansg wrote: Sat Dec 09, 2023 4:57 am Hi Alex,

Nice collection of close-ups. The last one is interesting. You are using a Dual-Band ERF. What wavelength is that?

Where are you imaging from?

Alfred
Hello,
hydrogen Ha band, center 656nm, bandwidth 25nm .
by alexhuangyan
Fri Dec 08, 2023 12:11 pm
Forum: This is SolarChat !!
Topic: 2023.12.7 Full disk white light 540&CAH&HA
Replies: 7
Views: 567

2023.12.7 Full disk white light 540&CAH&HA

white light 540/CAH/HA
by alexhuangyan
Fri Nov 10, 2023 10:41 pm
Forum: This is SolarChat !!
Topic: AR3477 2023/11/5 Antlia Duo-Band 200ERF GSO CC8
Replies: 14
Views: 1109

Re: AR3477 2023/11/5 Antlia Duo-Band 200ERF GSO CC8

Dennis wrote: Fri Nov 10, 2023 8:00 am Nice ones, can you tell us more about the 200mm erf that you use?
1. ERF coating bandwidth 25nm per channel!(HA656nm,CAK393nm)
2. Infrared up to 1700nm!
3. Quartz glass
by alexhuangyan
Thu Nov 09, 2023 2:33 pm
Forum: This is SolarChat !!
Topic: AR3477 2023/11/5 Antlia Duo-Band 200ERF GSO CC8
Replies: 14
Views: 1109

Re: AR3477 2023/11/5 Antlia Duo-Band 200ERF GSO CC8

Antlia Duo-Band 200ERF+GSO CC8+ Herschel Prisme
by alexhuangyan
Thu Nov 09, 2023 2:31 pm
Forum: This is SolarChat !!
Topic: AR3477 2023/11/5 Antlia Duo-Band 200ERF GSO CC8
Replies: 14
Views: 1109

Re: AR3477 2023/11/5 Antlia Duo-Band 200ERF GSO CC8

Antlia Duo-Band 200ERF+GSO CC8+ ES3X+QUARK
by alexhuangyan
Thu Nov 09, 2023 2:28 pm
Forum: This is SolarChat !!
Topic: AR3477 2023/11/5 Antlia Duo-Band 200ERF GSO CC8
Replies: 14
Views: 1109

Re: AR3477 2023/11/5 Antlia Duo-Band 200ERF GSO CC8

Antlia Duo-Band 200ERF+ GSO CC8+CALCIUM H-line QUARK
by alexhuangyan
Mon Aug 28, 2023 6:33 am
Forum: This is SolarChat !!
Topic: 18.7.2022, more fun with AR 3057 @393nm
Replies: 26
Views: 1166

Re: 18.7.2022, more fun with AR 3057 @393nm

Dennis has great details! Amazing!
The first photo: AR3057 camera is 432, assuming Barrow is 3X, and the image sampling is only 0.26; But C9.25 has a resolution of approximately 0.35 at 393nm, does the image drizzle 2-3X?
Thank you for your reply!
by alexhuangyan
Thu Aug 24, 2023 8:42 am
Forum: This is SolarChat !!
Topic: 2023-8-23 M1.1 Solar flare! AR3405 102ED&ERFC8
Replies: 6
Views: 358

2023-8-23 M1.1 Solar flare! AR3405 102ED&ERFC8

Poor visibility in the sky with clouds; Excessive gain and exposure, resulting in excessive image noise.
102ed +174MM
by alexhuangyan
Thu Aug 24, 2023 8:12 am
Forum: This is SolarChat !!
Topic: 2023-8-23 Full disk & H-Alpha, CaH and 540NM
Replies: 7
Views: 420

2023-8-23 Full disk & H-Alpha, CaH and 540NM

Poor visibility in the sky with clouds; Excessive gain and exposure, resulting in excessive image noise.
540nm full disk.
by alexhuangyan
Tue Aug 15, 2023 2:27 am
Forum: This is SolarChat !!
Topic: 11.08.23: AR3394 & AR3395 white light closeups
Replies: 14
Views: 604

Re: 11.08.23: AR3394 & AR3395 white light closeups

Very nice indeed!
Intergranular bright points!
by alexhuangyan
Wed Aug 09, 2023 1:06 pm
Forum: This is SolarChat !!
Topic: X1.6 solar flare!AR3386 2023/8/6 ERF C8
Replies: 13
Views: 601

Re: X1.6 solar flare!AR3386 2023/8/6 ERF C8

james, Thank you for your reply. AR3386X1.6 level, shooting time only reaches the tail; Flares are at the edge of the sun; The 2017 AR2673 was very spectacular, right in the middle of the sun, looking forward to 25 cycles of large X-level flares Alexhy, Awesome animation and capture! I was hoping so...
by alexhuangyan
Tue Aug 08, 2023 11:10 am
Forum: This is SolarChat !!
Topic: August 01 2023, AR3380 M flare
Replies: 17
Views: 934

Re: August 01 2023, AR3380 M flare

Great images !Leo
by alexhuangyan
Tue Aug 08, 2023 11:08 am
Forum: This is SolarChat !!
Topic: AR3387 07-08-2023
Replies: 15
Views: 641

Re: AR3387 07-08-2023

Great SPOD, Martin!!
by alexhuangyan
Tue Aug 08, 2023 11:06 am
Forum: This is SolarChat !!
Topic: Ca H-line&H-alpha&540 Fulldisk 203/8/6
Replies: 7
Views: 312

Re: Ca H-line&H-alpha&540 Fulldisk 203/8/6

Sun Photosphere Full Disk 2023/8/6 Baader AstroSolar3.8 2047D50/F270+7brand540nm +ES3X+0.6X
Scale: 1.0 arsec/pixel QHY5III178M Exposure= 300frames*1.2ms Gain=11
Alexhy Shanghai
by alexhuangyan
Tue Aug 08, 2023 11:06 am
Forum: This is SolarChat !!
Topic: Ca H-line&H-alpha&540 Fulldisk 203/8/6
Replies: 7
Views: 312

Re: Ca H-line&H-alpha&540 Fulldisk 203/8/6

Sun H-alpha 6562.8 Å Full Disk 2023/8/6 2047D50F270+ES3X+ComboQuark+0.6X
Scale: 1.0 arsec/pixel QHY5III178M Exposure=300framesX2.5ms Gain=11
Alexhy Shanghai
by alexhuangyan
Tue Aug 08, 2023 11:05 am
Forum: This is SolarChat !!
Topic: Ca H-line&H-alpha&540 Fulldisk 203/8/6
Replies: 7
Views: 312

Re: Ca H-line&H-alpha&540 Fulldisk 203/8/6

Sun Ca H-line 3968.5 Å Full Disk 2023/8/6 +Skyrover 102ED(D=80)+CALCIUM H-line QUARK
Scale: 0.69 arsec/pixel QHY5III178M Exposure=300framesX0.40ms Gain=11
Alexhy Shanghai
by alexhuangyan
Tue Aug 08, 2023 11:04 am
Forum: This is SolarChat !!
Topic: Ca H-line&H-alpha&540 Fulldisk 203/8/6
Replies: 7
Views: 312

Ca H-line&H-alpha&540 Fulldisk 203/8/6

Sun Ca H-line 3968.5 Å Full Disk 2023/8/6 +Skyrover 102ED(D=80)+1.7X+CALCIUM H-line QUARK
Scale: 0.40 arsec/pixel QHY5III178M Exposure=300framesX1.75ms Gain=11
Alexhy Shanghai
by alexhuangyan
Tue Aug 08, 2023 11:02 am
Forum: This is SolarChat !!
Topic: X1.6 solar flare!AR3386 2023/8/6 ERF C8
Replies: 13
Views: 601

X1.6 solar flare!AR3386 2023/8/6 ERF C8

X1.6 solar flare!AR3386 2023/8/6 ERFC8+ ES3X+ComboQuark
Scale:0.15 arsec/pixel Apollo-M MINI (IMX429) Exposure=500framesX15ms Gain75
Alexhy Shanghai
by alexhuangyan
Tue Jul 04, 2023 11:49 am
Forum: This is SolarChat !!
Topic: AR3355 in very good seeing condition - Ha and OIII - Mewlon 250 - June 29th
Replies: 23
Views: 1253

Re: AR3355 in very good seeing condition - Ha and OIII - Mewlon 250 - June 29th

Superb images Christian。

1. 250Ha image, which product is SMN35 0.5A that cannot be seen in the market?

2. What is the bandwidth after stacking PE 0.6+SMN35 0.5A?

Thank you for your reply!
by alexhuangyan
Tue Jul 04, 2023 11:37 am
Forum: SPoD Archive
Topic: AR3354, Ha and White Light, C8 203 ERF July 2, 2023
Replies: 10
Views: 1147

Re: AR3354, Ha and White Light, C8 203 ERF July 2, 2023

I am a bit puzzled by the very long exposure time in Ha. On my side, I've about 6 to 7 ms with the C8 EdgeHD, DS configuration, IMX174 and 0.22 arsec/pixel sampling. It could be beneficial to increase the gain of the IMX432 to 250-300. This is what I use with the Mewlon at 0.18 arsec/pixel and DS c...
by alexhuangyan
Tue Jul 04, 2023 11:37 am
Forum: This is SolarChat !!
Topic: AR3354, Ha and White Light, C8 203 ERF July 2, 2023
Replies: 14
Views: 797

Re: AR3354, Ha and White Light, C8 203 ERF July 2, 2023

I am a bit puzzled by the very long exposure time in Ha. On my side, I've about 6 to 7 ms with the C8 EdgeHD, DS configuration, IMX174 and 0.22 arsec/pixel sampling. It could be beneficial to increase the gain of the IMX432 to 250-300. This is what I use with the Mewlon at 0.18 arsec/pixel and DS c...
by alexhuangyan
Mon Jul 03, 2023 12:03 pm
Forum: This is SolarChat !!
Topic: Full disk inWL540,393 &HA 7/2/2023
Replies: 7
Views: 578

Re: Full disk inWL540,393 &HA 7/2/2023

wl 393
Sun Photosphere Full Disk 2023/7/2 Skyrover 102ED(D=70)+Herschel Prisme+1.4X+Antila 393nm-3nm FWHM filter
Scale: 0.49 arsec/pixel QHY5III178M Gain=0 Exposure= 200framesX0.75ms
Alexhy Shanghai
by alexhuangyan
Mon Jul 03, 2023 11:58 am
Forum: This is SolarChat !!
Topic: Full disk inWL540,393 &HA 7/2/2023
Replies: 7
Views: 578

Re: Full disk inWL540,393 &HA 7/2/2023

Sun H-alpha 6562.8 Å Full Disk 2023/7/2 2047D50F270+ES3X+ComboQuark+0.6X
Scale: 1.0 arsec/pixel QHY5III178M Exposure=300framesX2.2ms Gain=11
Alexhy Shanghai
by alexhuangyan
Mon Jul 03, 2023 11:57 am
Forum: This is SolarChat !!
Topic: Full disk inWL540,393 &HA 7/2/2023
Replies: 7
Views: 578

Full disk inWL540,393 &HA 7/2/2023

WL540
Sun Photosphere Full Disk 2023/7/2 Baader AstroSolar3.8 2047D50/F270+7brand540nm +ES3X+0.6X
Scale: 1.0 arsec/pixel QHY5III178M Exposure= 300frames*5ms Gain=14
Alexhy Shanghai