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Images - Session 1004 (2022-04-27)
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| Nova Cas 2021 (Cassiopeia) Nova in Cassiopeia discovered 2021-03-18.4236, by Yuji Nakamura (Japan) Magnitude at discovery +9.6 (unfiltered CCD) AT2021hkn (Type: Nova) reported by 2021/03/30.055 UT by Gaia Alias: Gaia21bpe, AT2021hkn, V1405 Cas |
| Nova Cas 2021 - 2022-04-28 (T+405.6d) Image below (2022-04-28.056) was taken 405.6 days after discovery of V1405 Nova is shown by white cross hairs. Measured magnitude +9.97 (linked with Detection Threshold = 30) |
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| Annotated CCD Image (100% size, linear scale, cropped) 5 x 30s exposure (average combine), 3x3 binning, C Filter 2022-04-28 01:23 UT (#1004091-95) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Nova Cas 2021 (V1405 Cas) Spectra - 2022-04-28 (T+405.6d) |
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| Spectra produced in AstroMain using Image taken with Star Analyser
200 5 x 45s exposure (average combine), 2x2 binning, S Filter 2022-04-28 01:27 UT (#1004096-100) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
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| Spectra taken with Star Analyser
200 (square root scale) 5 x 45s exposure (average combine), 2x2 binning, S Filter 2022-04-28 01:27 UT (#1004096-100) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Images of Nova Cas 2021 on Novae Page >> |
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| AT 2022evu (Bootes) AT 2022evu (Type: CV) discovered 2022-03-17.345 UT by MASTER Alias: MASTER OT J144954.78+401346.5 Discovery Mag +13.1 (vs non-detection / mag limit +18.2) Identified in Aladin/Simbad as CSS J144954.6+401349 (a RR Lyr type variable) ( TNS 2022evu ) |
| AT 2022evu - 2022-04-28 (T+41.7d) Image below (2022-04-28.082) was taken 41.7 days after discovery of 2022evu Position of reported transient (fading) is shown by white cross-hairs Measured magnitude +13.38 |
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| Annotated CCD Image (100% size, linear scale, cropped) 3 x 60s exposure (average combine), 3x3 binning, C Filter 2022-04-28 02:02 UT (#1004111-14) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Images of AT 2022evu on Transients 2022 Page |
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| M31 with AT2022icc (Andromeda) AT2022icc (Type: unk) discovered 2022-04-22.913 UT by XOSS Alias: XM70MZ Discovery Mag +17.3 ( Rochester EGN Page | TNS 2022icc ) |
| M31 - Spiral Galaxy with AT2022icc (T+5.2d) Position of reported transient (very faint) is shown by white circle |
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| Annotated CCD Image (50% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2022-04-28 02:18 UT (#1004117-21) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| M31 with AT2022icc - 2022-04-28 (T+5.2d) Image below (2022-04-28.089) was taken 5.2 days after discovery of 2022icc Position of reported transient (very faint) is shown by black cross-hairs |
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| Annotated negative CCD Image (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2022-04-28 02:18 UT (#1004117-21) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
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| Annotated negative CCD Image (125% size, square root scale, cropped, unsharp masked) Image details as above |
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| NGC 3367 with SN2022ewj (Leo) SN 2022ewj (Type: II) discovered 2022-03-19.544 UT by Koichi Itagaki Alias: ATLAS22jhw ( Rochester Supernova site | TNS 2022ewj ) |
| NGC 3367 with SN2022ewj - 2022-04-27 (T+39.4d) Image below (2022-04-27.923) was taken 39.4 days after discovery of 2022ewj Position of SN (distinct) is shown by white cross-hairs Measured magnitude +16.66 |
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| Annotated CCD Image (125% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2022-04-27 22:19 UT (#1004013-17) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Images of SN 2022ewj (NGC 3367) on Supernovae 2022 Page |
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| NGC 4348 with SN2022fw (Virgo) SN 2022fw (Type: Ia) discovered 2022-01-09.490 UT by ASAS-SN Alias: ASASSN-22am (Rochester Supernova site | TNS 2022fw ) |
| NGC 4348 with SN2022fw - 2022-04-27 (T+108.4d) Image below (2022-04-27.938) was taken 108.4 days after discovery of 2022fw Position of reported SN (fading?) is shown by white cross-hairs Measured magnitude +14.77 |
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| Annotated CCD Image (100% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2022-04-27 22:40 UT (#1004020-24) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Images of SN 2022fw (NGC 4348) on Supernovae 2022 Page >> |
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| NGC 4395 with AT 2022fmn (Canes Venatici) AT 2022fmn (Type: AGN) discovered 2022-03-30.813 UT by XOSS Alias: XM112HT Discovery Mag +15.99 ( Rochester Supernova site | TNS 2022fmn | Discovery Images ) |
| NGC 4395 with AT 2022fmn - 2022-04-27 (T+28.2d) Image below (2022-04-27.999) was taken 28.2 days after discovery of 2022fmn Position of reported AGN (bright & distinct) is shown by white cross-hairs) Measured Magnitude +15.91 |
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| Annotated CCD Image (100% size, square root scale,
cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2022-04-28 00:09 UT (#1004049-53) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Images of AT 2022fmn (NGC 4395) on Transients 2022 Page |
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| NGC 4545 with SN2022fuc (Draco) SN 2022fuc (Type: II) discovered 2022-04-02.878 UT by Giancarlo Cortini Alias: ATLAS22lhg, ZTF22aadpuwe ( Rochester Supernova site ) |
| NGC 4545 with SN2022fuc - 2022-04-28 (T+25.1d) Image below (2022-04-28.016) was taken 25.1 days after discovery of 2022fuc Position of SN (bright) is shown by white cross-hairs Measured magnitude +15.72 |
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| Annotated CCD Image (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2022-04-28 00:32 UT (#1004056-60) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Images of SN 2022fuc (NGC 4545) on Supernovae 2022 Page >> |
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| NGC 4647 with SN2022hrs (Virgo) SN 2022hrs (Type: Ia) discovered 2022-04-16.619 UT by Koichi Itagaki Alias: ATLAS22mip Discovery Magnitude 15 (Clear Filter) ( Rochester Supernova site | TNS 2022hrs | Forth Image) Whilst TNS Classification records 2022hrs as a Type Ia SN, spectra taken with my equipment this night (2022-04-27.913) suggest it is actually a Type Ib SN |
| NGC 4647 with SN2022hrs - 2022-04-27 (T+11.3d) Image below (2022-04-27.901) was taken 11.3 days after discovery of 2022hrs Position of SN (bright) is shown by white cross-hairs Measured magnitude +12.52 (brightening) |
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| Annotated CCD Image (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2022-04-27 21:47 UT (#1004003-07) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Images of SN 2022hrs (NGC 4647) on Supernovae 2022 Page >> |
| SN2022hrs Spectra - 2022-04-27 (T+11.3d) |
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| Realtime picture generated from raw CCD Image 180s exposure (single frame), 3x3 binning, C Filter 2022-04-27 22:00 UT (#1004008) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
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| Spectra produced in AstroMain using Image taken with Star Analyser
200 3 x 180s exposure (average combine), 2x2 binning, S Filter 2022-04-27 22:00 UT (#1004008-10) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 Note: Wavelengths in above plot are Wavelengths as measured (i.e. no redshift corrections are applied) |
| SN2022hrs Classification |
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The spectra from classification report (Claudio Balcon, Belluno A.O.
ISSP), https://www.wis-tns.org/object/2022hrs , is shown below at the same scale as my spectra The distinct absorption line at observed wavelength of 6028 A (rest wavelength 6000 A) in Claudio Balcon’s spectra would seems to correspond (visually at least) with the one that my real-time spectra picture has except that my line is instead at 5890 A (~ 5862 A rest). It could be that my wavelength calibration is wrong (though I don’t think so) . Either way the overall shape of the match is quite good. Given the supernova’s supposed type Ia classification however it is my understanding that it’s spectra should have a distinct Si line at 6150 A. But Claudio Balcon’s classification spectra has it’s distinct absorption line at 6000 A (rest). This is clearly not at 6150 A so it calls into question the Ia classification that is attributed to the SN. Now a Type Ib supernova has instead a distinct (He) absorption line at 5876 A. See https://www.physics.rutgers.edu/analyze/wiki/Ia_supernovae.html This would actually fit vey well with the position of the distinct absorption line (5890 meas/5862 rest) in my spectra . So it could be Claudio Balcon’s spectra is the one that is wrongly calibrated, rather than mine, and that the Type Ia classification is wrong. (Increasing the assumed red-shift distance to SN can’t explain the apparently missing Si (silicon) line, it makes the discrepancy even worse. To fit with a Type Ia SN with a Si line would require z = –0.15 (ie blue-shifted) , which would not fit with NGC 4647 redshift (z = 0.0047) or M60’s redshift (z=0.0037). Maybe the Si line will only develop in later time ? (Balcon remarked that the spectrum supposedly resembles that of SN Type Ia about two weeks before the maximum light at the redshift of the host galaxy ? ) For time being at least a Ib classification seems better to me. Type 1b (and 1c) SN lack the absorption line of silicon that typify the standard 1a SN . Type 1b SN are hypothesized to have been produced by core collapse of massive stars that have lost their outer layer of hydrogen (1c SN hypothesized to have lost outer layers of both hydrogen and helium). Both known as ‘stripped core-collapse supernovae’. https://en.wikipedia.org/wiki/Type_Ib_and_Ic_supernovae The absence of a distinct Ha line at 6553 A rules out a Type II supernova. |
| Images of SN 2022hrs (NGC 4647) on Supernovae 2022 Page >> |
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| NGC 4697 (Virgo) Alias: UGCA 300, Caldwell 52 |
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| CCD Image (100% size, log scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2022-04-27 23:02 UT (#1004027-31) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| NGC 4697 - Earlier Image (2020) NGC 4697 / UGCA 300 (catalog mag +10.4) with PGC 170203 (catalog mag +15.1), PGC 1039472 (catalog mag +17.2), PGC 1040005 (catalog mag +18.1) |
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| CCD Image (100% size, log scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2020-04-28 00:39 UT (#775087-91) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| NGC 4697 - Earlier Wider View Image (2020) NGC 4697 / UGCA 300 (catalog mag +10.4) with PGC 170203 (catalog mag +15.1), PGC 1039472 (catalog mag +17.2), PGC 1040005 (catalog mag +18.1) |
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| CCD Image (50% size, log scale) Image details as above |
| NGC 4697 - Earlier Image (2008) |
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| CCD Image (100% size, linear scale) 4 x 120s exposure, 2x2 binning, C Filter 2008-01-1207:06 hUT (#252766-69) 8" LX200 Classic + ST-7E |
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| NGC 5018 with SN2021fxy (Virgo) SN 2021fxy (Type: Ia) discovered 2021/03/17.725 UT by Koichi Itagaki ( Rochester Supernova site | Discovery Image | Paolo Campaner image ) |
| NGC 5018 with SN2021fxy - 2022-04-27 (T+406.2d) Image below (2022-04-27.970) was taken 406.2 days after discovery of 2021fxy Position of earlieSNSN (faded/no longer visible) is indicated by white cross-hairs. |
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| Annotated CCD Image (100% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2022-04-27 23:27 UT (#1004034-38) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| NGC 5018 with SN2021fxy - Earlier Image, 2021-03-23 (T+5.3d) Image below (2021-03-23.058) was taken 5.3 days after discovery of SN2021fxy SN is indicated by white cross-hairs. Measured magnitude + 14.5 |
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| Annotated CCD Image (100% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-23 01:34 UT (#874164-67) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Images of SN 2021fxy (NGC 5018) on Supernovae 2021 Page >> |
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| NGC 5117 with SN2022abq (Canes Venatici) SN 2022abq (Type: II) discovered 2022-01-21.050 UT by F. Cappiello, S. Massaro Alias: Ric7-2022abqGBObs, ATLAS22cks (Rochester Supernova site | TNS 2022abq ) |
| NGC 5117 with SN2022abq - 2022-04-27 (T+96.9d) Image below (2022-04-27.984) was taken 96.9 days after discovery of 2022abq Position of SN is shown by white cross-hairs Measured magnitude +16.61 |
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| Annotated CCD Image (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2022-04-27 23:46 UT (#1004041-45) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Images of SN 2022abq (NGC 5117) on Supernovae 2022 Page |
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| NGC 6181 (Hercules) |
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| Annotated CCD Image (50% size, log scale) 3 x 180s exposure (average combine), 3x3 binning, C Filter 2022-04-28 01:46 UT (#1004104-08) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| NGC 6181 - Detail |
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| CCD Image (100% size, log scale, cropped) Image details as above |
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| Annotated Negative CCD Image (100% size, log scale, cropped) Image details as above |
| NGC 6181 - Earlier Image (2019) |
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| CCD Image (100% size, log scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2019-01-31 03:50 UT (#653479-82) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
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| NGC 6181 with AT 2022iha (Hercules) AT 2022iha (Type: HP) discovered 2022-04-24.586 UT by Shigemi Kato ( Rochester Supernova site | TNS 2022iha | |
| NGC 6181 - Spiral Galaxy |
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| CCD Image (100% size, log scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, C Filter 2022-04-28 01:46 UT (#1004104-08) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| NGC 6181 with AT 2022iha - 2022-04-28 (T+3.5d) Image below (2022-04-28.067) was taken 3.5 days after discovery of 2022iha Position of reported transient (not visible / not distinguishable) is show by white cross-hairs |
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| CCD Image (100% size, log scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, C Filter 2022-04-28 01:46 UT (#1004104-08) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Images of AT 2022iha (NGC 6181) on Transients 2022 Page |
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| This Web Page: | Images - Session 1004 (2022-04-27) |
| Last Updated : | 2024-06-17 |
| Site Owner : | David Richards |
| Home Page : | David's Astronomy Web Site |
