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Images - Session 1339 (2025-07-07)
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Objects Session Notes
AT 2024xpy - Type BL Transient AT 2025md - CV Type Transient, V1948 Cyg Variable Stars (photometric monitoring) - None Nearby Stars (astrometric monitoring) - 61 Cyg
- Short session (2.2 hr). Short summer night. Session affected by problems with CcdCamera, and by cloud/wind. - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature : 10.5°C (min) - CCD Temperature: -5°/-10°C - Notes from 2025-07-07 >> -
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AT 2024xpy (Hercules) AT 2024xpy (Type: BL) discovered 2024-10-04.838 UT by Gaia Alias: Gaia24cvy Alerting Magnitude 16.17 (G-Gaia Filter) vs Historic Magnitude 17.28 +/- 0.29 Brightening in known BL Lac type object (2FGL J1844.3+1548) Normal Magnitude 17.0 to 18.0 ( TNS 2024xpy | Gaia24cvy | Simbad 2FGL J1844.3+1548 ) |
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AT 2024xpy - 2025-07-07 (T+276.2d) Image below (2025-07-07.997) was taken 276.2 days after discovery of 2024xpy Position of earlier transient (faint, fading) is shown by white cross-hairs Estimated Magnitude +16.6 Clear Filter) Very poor quality images (poor guiding / trailed stars) |
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Annotated CCD Image (100% size, linear scale, cropped) 180s exposure (single frame), 3x3 binning, Clear Filter 2025-07-07 23:55 UT (#1339011) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Images of AT 2024xpy on Transients 2024 Page >> |
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AT 2025md (Cygnus) AT 2025md (Type: CV) discovered 2025-01-12.882 UT by Gaia Alias: Gaia25adm, V1948 Cyg Alerting Magnitude 13.47 (G-Gaia Filter) vs Historic Magnitude 14.94 +/- 0.65 SD Outburst in known CV named V1948 Cyg ( TNS 2025md | Gaia25adm ) |
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AT 2025md - 2025-07-08 (T+176.1d) Image below (2025-07-08.016) was taken 176.1 days after discovery of 2025md Position of earlier transient (distinct, brightening) is shown by white cross-hairs Measured Magnitude +13.72 (Clear Filter) |
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Annotated CCD Image (150% size, linear scale, cropped) 60s exposure (single frame), 3x3 binning, Clear Filter 2025-07-08 00:23 UT (#1339014) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Images of AT 2025md / V1948 Cyg on Transients 2025 Page >> |
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| This Web Page: | Images - Session 1339 (2025-07-07) |
| Last Updated : | 2025-07-12 |
| Site Owner : | David Richards |
| Home Page : | David's Astronomy Web Site |
