BHTOM Targets for 18 August, 2025
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wyrz...@gmail.com
Aug 18, 2025, 7:03:39 AMAug 18
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Hello,
Top 5 data uploaders!
Clear skies!
Your BHTOM Team
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Greetings from the BHTOM Automated Newsletter!
As of 2025-08-18 11:01:59.958904+00:00, these are the new targets added in the last week for observing (importance>=1), sorted by magnitude:
| name | ra | dec | mag_last | sun_separation | classification | description |
|---|---|---|---|---|---|---|
| HD 98800 | 170.521620 | -24.777768 | 10.1 | 44.0 | YSO | Pre-main sequence quadruple system (AaAb + BaBb) with circumbinary (BaBb) disk to eclipse AaAb |
| ASASSN-25db | 259.638083 | -32.108600 | 14.4 | 116.0 | Unknown | a deep ongoing dimming event |
| SN2025pht | 70.370254 | -2.865447 | 16.2 | 78.0 | SN | SN IIP, ASASSN-25cw |
| SN 2025sei | 267.247705 | 25.495857 | 16.3 | 110.0 | SN | Astro-COLIBRI target |
| TDE2025spf | 299.446533 | -9.034914 | 19.4 | 152.0 | Unknown | TDE candidate |
| TDE2025gmz | 242.411121 | 44.583689 | 20.4 | 84.0 | TDE | TDE-featureless |
| AT2025tkk | 199.943492 | 5.864447 | 22.2 | 52.0 | Unknown | Possible SN ~16.2 mag via TNS |
In addition, here are some older targets that are currently visible and requested for observations. These targets have an importance>=4, a sun separation>70, and last magnitude<18, sorted by magnitude.
| name | ra | dec | mag_last | sun_separation | classification | description |
|---|---|---|---|---|---|---|
| TCrB | 239.875676 | 25.920170 | 7.3 | 86.0 | Nova | recurent nova predicted to explode 2024/2025 |
| LS I +61 302 | 40.131935 | 61.229332 | 9.5 | 87.0 | Unknown | Be-star with unknown compact companion |
| 4U2206+54 | 331.984320 | 54.518447 | 9.6 | 112.0 | XRB | Be X-ray binary |
| V1413 Aql | 285.945155 | 16.438048 | 9.6 | 129.0 | Symbiotic star | known symbiotic star for regular monitoring |
| 2S0114+65 | 19.511240 | 65.291619 | 10.2 | 93.0 | XRB | Supergiant X-ray binary |
| RXJ0146.9+6121 | 26.750885 | 61.356573 | 11.2 | 92.0 | XRB | Be X-ray binary |
| AM_Her | 274.055228 | 49.867989 | 12.5 | 102.0 | CV | Target for joint optical-radio observations |
| RXJ0441.0+4431 | 70.247207 | 44.530349 | 12.6 | 72.0 | XRB | Be X-ray binary |
| SAXJ2103.5+4545 | 315.898792 | 45.751547 | 12.9 | 120.0 | XRB | Be X-ray binary |
| Gaia21fji | 315.992250 | 50.244500 | 13.1 | 116.0 | YSO | Optical monitoring of Gaia- and ZTF-alerted candidate eruptive YSOs |
| IGRJ21343+4738 | 323.584883 | 47.633391 | 13.8 | 119.0 | XRB | Be X-ray binary |
| GROJ2058+42 | 314.698071 | 41.776995 | 14.2 | 124.0 | XRB | Be X-ray binary |
| Gaia22efa | 67.656210 | 35.842100 | 14.2 | 74.0 | YSO | Brightening in candidate YSO. After initial accretion burst the brightness started to rise slowly. |
| Mrk 841 | 226.004963 | 10.437732 | 14.4 | 77.0 | AGN | changinglook AGN |
| BL_Lac | 330.680381 | 42.277772 | 14.4 | 125.0 | BL Lac | famous variable blazar |
| KS1947+300 | 297.397850 | 30.208827 | 14.4 | 128.0 | XRB | Be X-ray binary |
| ZTF18abdciiz | 281.649375 | 0.922556 | 14.8 | 132.0 | Unknown | YSO candidate |
| 4U0115+63 | 19.633210 | 63.742520 | 14.9 | 93.0 | XRB | Be X-ray binary |
| Gaia24dfc | 52.509900 | 61.429790 | 15.8 | 81.0 | Unknown | Brightening in candidate YSO |
| SN2024afyu | 258.429383 | 7.625256 | 16.3 | 108.0 | SN | Interesting long-term Supernova |
| Gaia22cav | 344.036730 | 58.517780 | 16.7 | 107.0 | YSO | 3 mag outburst in candidate EXOR, waiting for the next outbursts |
| AT2025oas | 35.353317 | 16.568961 | 16.8 | 107.0 | Unknown | Possible SN ~17 mag via TNS |
| Gaia4323024741104637568 | 292.501025 | 17.933682 | 17.1 | 134.0 | Unknown | Possibly eruptive YSO which is approaching to the quiescence |
| SDSS J013136.44+130331.0 | 22.901854 | 13.058618 | 17.5 | 119.0 | QSO | Candidate for lensed QSO |
| Gaia21drn | 4.823430 | 65.848570 | 17.5 | 96.0 | Unknown | brightening of a faint red Gaia source |
| AT2025mau | 276.599034 | 10.235546 | 17.7 | 124.0 | Microlensing Event | Candidate long microlensing event from Chinese KATS survey, KATS25K015, almost gone |
| Gaia2204674337304419072 | 334.773114 | 61.604365 | 17.9 | 105.0 | Unknown | Possibly eruptive YSO which is approaching to the quiescence |
| name | ra | dec | mag_last | sun_separation | classification | description |
|---|---|---|---|---|---|---|
| Mkn590 | 33.639835 | -0.766717 | 13.7 | 113.0 | QSO | Flaring quasar |
| mrk1018 | 31.566619 | -0.291455 | 13.7 | 115.0 | AGN | changinglook AGN |
| IRAS 23226-3843 | 351.350833 | -38.446978 | 14.4 | 147.0 | AGN | changinglook AGN |
| Gaia19dbf | 178.699417 | -64.491850 | 14.5 | 81.0 | Unknown | Possibly a YSO |
| ASASSN-25cd | 277.969917 | -28.807539 | 15.0 | 132.0 | Unknown | A Deep, Ongoing, Dipping Event |
| 1RXS_J173546.9-302859 | 263.946400 | -30.482900 | 15.3 | 119.0 | Unknown | Possible X-ray transient from SVOM |
| Gaia23bsf | 276.583080 | -14.036970 | 15.4 | 131.0 | Unknown | Star getting brighter very slowly |
| Gaia24ccy | 243.402110 | -25.063310 | 15.4 | 101.0 | YSO | known YSO brightens by 2 mag |
| Gaia24amo | 249.148921 | -53.749919 | 15.7 | 107.0 | Microlensing Event | candidate microlensing event, with the second peak |
| SN 2025rpt | 28.589626 | -2.618816 | 15.7 | 119.0 | SN | Astro-COLIBRI target |
| PKS0454-234 | 74.263250 | -23.414450 | 15.9 | 80.0 | QSO | long time monitoring for ROTUZ team |
| HE0413_4031 | 63.810269 | -40.394754 | 15.9 | 94.0 | QSO | Long term variable quasar for monitoring |
| PMNJ0730-6602 | 112.706495 | -66.038578 | 16.4 | 83.0 | AGN | IAUZ Target |
| Gaia24csq | 286.710270 | -26.939590 | 16.6 | 140.0 | Unknown | potential slowly rising microlensing event |
| CTS_C30.10 | 71.833281 | -45.627319 | 16.7 | 90.0 | QSO | Long term variable quasar for monitoring |
| AT2024zkr | 28.595650 | -5.997339 | 16.8 | 119.0 | AGN | BFF candidate, spectrum shows HeII and NIII, ePESSTO+ target |
| HE0435-4312 | 69.299139 | -43.101189 | 17.0 | 91.0 | QSO | Long term variable quasar for monitoring |
| V1725 Sco | 256.693920 | -35.468560 | 17.0 | 113.0 | Nova | Astro-COLIBRI target, nova, still on-going |
| AT2023xbu | 58.991412 | -16.412656 | 17.2 | 92.0 | AGN | candidate repeating TDE, other name ZTF22abveoak, ePESSTO target |
| 4FGL J1603.8-4903 | 240.966507 | -49.061699 | 17.5 | 102.0 | Unknown | Astro-COLIBRI target |
| Gaia23cnm | 285.322920 | -18.717130 | 17.6 | 139.0 | Unknown | slow and long rise, possible microlensing or YSO |
| AT2024vip | 80.208787 | -20.542286 | 17.7 | 74.0 | Unknown | TDE |
| ZTF20abendxc | 281.224708 | -8.538111 | 17.8 | 134.0 | YSO | Possibly eruptive YSO |
Last week's total of images processed: 7922 (7623 with success).
Last week's targets observed:
| camera | target_names |
|---|---|
| Adonis_G2-1600 | LS I +61 302, Gaia24ayd, Gaia24azi, Gaia24dfv, Gaia24azc, TCrB, AM_Her, TabbysStar |
| EEye_QHY268M | Gaia24csq, Gaia24aup, AT2024kwu, Gaia24ctf, AT2025mau, Gaia23cnm |
| Flarestar-MPC171_G2-1600 | Gaia21fji, TCrB |
| LCOGT-CTIO-1m_4K | Gaia24amo, AT2025mau |
| LCOGT-MCD-1m_4K | Gaia24dov, AT2025mau, Gaia24dmt |
| LCOGT-SAAO-1m_4K | Gaia24amo, Gaia22bpl |
| LCOGT-SAAO-40cm_QHY600M | AT2025mau |
| LCOGT-SS-1m_4K | Gaia24amo, AT2025mau, Gaia22bpl |
| LCOGT-SS-40cm_QHY600M | AT2025mau |
| LCOGT-Teide-1m_4K | AT2025mau |
| LCOGT-Teide-40cm_QHY600M | AT2025mau |
| LW_Seestar-S50 | BL_Lac |
| MSU-Observatory_QHY600PH | TabbysStar, 2S0114+65 |
| OAUJ-CDK500_U47 | Gaia24bhk, NGC5683-Seyfert, Gaia21fji, GROJ2058+42, Gaia23crr, Gaia24bux, Gaia24ayd, AT2025nsa, Gaia24dfv, SN2024afyu, BL_Lac, SN2025bof, Gaia23dqt, AT2025mau |
| PROMPT-MO-1_Apogee | ASASSN-24fw |
| PROMPT6_FLI | AT2025mau, ASASSN-24fw |
| ROAD_FLI-KAF-16803 | ASASSN-21js |
| ROAD_QHY600M | SN2025pht, HD 98800, ASASSN-25cd, ASASSN-24fw, ASASSN-21js, AT 2025nlr, ASASSN-25cy, AT2025hfm, AR_Pav, AT2025ggn, ASASSN-25bv, HD 269858, ASASSN-25db |
| SOAB_ZWO-ASI2600MM | mrk1018, IGRJ21343+4738, SN2024afyu, Gaia24dfc, AM_Her, SDSS J013136.44+130331.0, Gaia21drn, Gaia24aup, 4U0115+63, AT2025oas, 8C0716_714, ZTF18aarippg, SN 2025sei, KS1947+300, Gaia24dkk, RXJ0146.9+6121, V1413 Aql, TCrB, SAXJ2103.5+4545, AT2025mau, Mkn590, LS I +61 302, Gaia24bux, Gaia4323024741104637568, AT2024kwu, Gaia21fji, Mrk 841 |
| SUHORA60_APOGEE | Gaia2204674337304419072, Gaia24bux, Gaia4323024741104637568, Gaia21fji, Gaia21drn, Gaia24cjg |
| TJO_MEIA3 | Gaia24aup, LS I +61 302, Gaia24bux, AT2025oas, Gaia24ayd, Gaia23cpd, SN2024afyu, Gaia24dfc, TCrB, SN2025bof, Gaia23dqt, Gaia24dkk |
| UCLO-C14EAST_PL9000 | Gaia21azb, Gaia21efs |
| UwB_SBIG-4040 | 2S0114+65, mrk1018, IGRJ21343+4738, SN 2025rpt, SN2024afyu, BL_Lac, AM_Her, SDSS J013136.44+130331.0, GROJ2058+42, Gaia24aup, 4U0115+63, KS1947+300, NGC5683-Seyfert, 4U2206+54, RXJ0146.9+6121, V1413 Aql, TCrB, Mkn590, LS I +61 302, Gaia24bux, Gaia21fji |
| ZAO_G2-1600 | Gaia21fji, AT2025mau, Gaia21asp |
Last week's fits uploads score (sorted by count)
| observatory-user | count |
|---|---|
| Franz-Josef Hambsch (ROAD_QHY600M) | 5116 |
| Sebastian Kurowski (SOAB_ZWO-ASI2600MM) | 725 |
| Franz-Josef Hambsch (ROAD_FLI-KAF-16803) | 389 |
| Josep Manel Carrasco (TJO_MEIA3) | 328 |
| Steve Fossey (UCLO-C14EAST_PL9000) | 298 |
| Yauheni Stsefanenka (OAUJ-CDK500_U47) | 161 |
| Michal Siwak (SUHORA60_APOGEE) | 132 |
| Charles Galdies (ZAO_G2-1600) | 119 |
| Staszek Zola (OAUJ-CDK500_U47) | 72 |
| Wojciech Burzyński (UwB_SBIG-4040) | 61 |
| Sjoerd Dufoer (EEye_QHY268M) | 56 |
| Mauritz Wicker (LCOGT-SS-1m_4K) | 54 |
| Mauritz Wicker (LCOGT-CTIO-1m_4K) | 51 |
| Franky Dubois (Adonis_G2-1600) | 48 |
| Mauritz Wicker (LCOGT-Teide-40cm_QHY600M) | 45 |
| Mauritz Wicker (LCOGT-SAAO-1m_4K) | 42 |
| Patryk Więcko (OAUJ-CDK500_U47) | 40 |
| Stephen M. Brincat (Flarestar-MPC171_G2-1600) | 39 |
| Peter Craig (MSU-Observatory_QHY600PH) | 31 |
| Staszek Zola (PROMPT6_FLI) | 24 |
| Alicja Pucek (OAUJ-CDK500_U47) | 22 |
| Mauritz Wicker (LCOGT-MCD-1m_4K) | 15 |
| Oliwia Zielińska (OAUJ-CDK500_U47) | 12 |
| Mauritz Wicker (LCOGT-SAAO-40cm_QHY600M) | 12 |
| Mauritz Wicker (LCOGT-Teide-1m_4K) | 9 |
| Zbigniew Grabowski (LW_Seestar-S50) | 6 |
| Staszek Zola (PROMPT-MO-1_Apogee) | 6 |
| Maria Nicewicz (LW_Seestar-S50) | 3 |
| Mauritz Wicker (LCOGT-SS-40cm_QHY600M) | 3 |
| Jacek Drazkowski (LW_Seestar-S50) | 3 |
Top 5 data uploaders!
| name | count |
|---|---|
| Franz-Josef Hambsch | 5505 |
| Sebastian Kurowski | 725 |
| Josep Manel Carrasco | 328 |
| Steve Fossey | 298 |
| Mauritz Wicker | 231 |
Clear skies!
Your BHTOM Team
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