BHTOM Targets for 25 August, 2025
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wyrz...@gmail.com
Aug 25, 2025, 12:20:16 PMAug 25
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Greetings from the BHTOM Automated Newsletter!
As of 2025-08-25 16:19:12.709222+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 |
|---|---|---|---|---|---|---|
| V348 Sgr | 280.083038 | -22.908141 | 14.4 | 127.0 | Unknown | post-AGB star |
| AT2025uni | 266.374071 | -29.315961 | 15.7 | 115.0 | Unknown | Possible Nova ~14.4 mag via TNS |
| AT2025ugl | 73.251354 | -11.027878 | 17.0 | 83.0 | Unknown | Possible SN ~16.7 mag via TNS |
| AT2025rwt | 258.659221 | -40.036200 | 17.4 | 108.0 | Unknown | possible galactic nova |
| AT 2025ulz | 237.975816 | 30.902375 | 18.3 | 79.0 | Unknown | Astro-COLIBRI target, candidate for a kilonova, seen in difference imaging at 20 mag |
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 |
|---|---|---|---|---|---|---|
| LS I +61 302 | 40.131935 | 61.229332 | 9.5 | 92.0 | Unknown | Be-star with unknown compact companion |
| 4U2206+54 | 331.984320 | 54.518447 | 9.5 | 115.0 | XRB | Be X-ray binary |
| RXJ0441.0+4431 | 70.247207 | 44.530349 | 9.6 | 78.0 | XRB | Be X-ray binary |
| 2S0114+65 | 19.511240 | 65.291619 | 9.7 | 97.0 | XRB | Supergiant X-ray binary |
| TCrB | 239.875676 | 25.920170 | 10.8 | 82.0 | Nova | recurent nova predicted to explode 2024/2025 |
| RXJ0146.9+6121 | 26.750885 | 61.356573 | 12.3 | 97.0 | XRB | Be X-ray binary |
| V1413 Aql | 285.945155 | 16.438048 | 12.7 | 125.0 | Symbiotic star | known symbiotic star for regular monitoring |
| AM_Her | 274.055228 | 49.867989 | 12.9 | 100.0 | CV | Target for joint optical-radio observations |
| GROJ2058+42 | 314.698071 | 41.776995 | 13.2 | 125.0 | XRB | Be X-ray binary |
| KS1947+300 | 297.397850 | 30.208827 | 13.2 | 126.0 | XRB | Be X-ray binary |
| Gaia21fji | 315.992250 | 50.244500 | 13.2 | 117.0 | YSO | Optical monitoring of Gaia- and ZTF-alerted candidate eruptive YSOs |
| SAXJ2103.5+4545 | 315.898792 | 45.751547 | 13.7 | 121.0 | XRB | Be X-ray binary |
| Gaia22efa | 67.656210 | 35.842100 | 14.2 | 81.0 | YSO | Brightening in candidate YSO. After initial accretion burst the brightness started to rise slowly. |
| IGRJ21343+4738 | 323.584883 | 47.633391 | 14.4 | 121.0 | XRB | Be X-ray binary |
| 4U0115+63 | 19.633210 | 63.742520 | 14.5 | 98.0 | XRB | Be X-ray binary |
| Mrk 841 | 226.004963 | 10.437732 | 14.5 | 71.0 | AGN | changinglook AGN |
| BL_Lac | 330.680381 | 42.277772 | 14.9 | 127.0 | BL Lac | famous variable blazar |
| ZTF18abdciiz | 281.649375 | 0.922556 | 15.1 | 127.0 | Unknown | YSO candidate |
| Gaia24bux | 347.418150 | 62.482960 | 16.6 | 106.0 | YSO | Brightening in Gaia and Wise source, possibly new young eruptive star |
| Gaia4323024741104637568 | 292.501025 | 17.933682 | 16.7 | 130.0 | Unknown | Possibly eruptive YSO which is approaching to the quiescence |
| Gaia22cav | 344.036730 | 58.517780 | 16.7 | 110.0 | YSO | 3 mag outburst in candidate EXOR, waiting for the next outbursts |
| SN2024afyu | 258.429383 | 7.625256 | 16.9 | 103.0 | SN | Interesting long-term Supernova |
| SN 2025sei | 267.247705 | 25.495857 | 17.1 | 106.0 | SN | Astro-COLIBRI target |
| SDSS J013136.44+130331.0 | 22.901854 | 13.058618 | 17.4 | 126.0 | QSO | Candidate for lensed QSO |
| AT2025oas | 35.353317 | 16.568961 | 17.6 | 113.0 | Unknown | Possible SN ~17 mag via TNS |
| SN2025bof | 299.147242 | 50.239614 | 17.7 | 112.0 | SN | Possible SNIa in nearby galaxy |
| Gaia24dfc | 52.509900 | 61.429790 | 17.7 | 86.0 | Unknown | Brightening in candidate YSO |
| Gaia2204674337304419072 | 334.773114 | 61.604365 | 17.7 | 108.0 | Unknown | Possibly eruptive YSO which is approaching to the quiescence |
| name | ra | dec | mag_last | sun_separation | classification | description |
|---|---|---|---|---|---|---|
| AT 2025nlr | 227.013640 | -40.141550 | 9.6 | 84.0 | Nova | Astro-COLIBRI target |
| T Ori | 83.960201 | -5.476368 | 11.3 | 71.0 | YSO | Herbig AeBe star, YSO |
| V1787 Ori | 84.538767 | -6.821276 | 12.9 | 71.0 | YSO | Herbig Ae/Be Star |
| SN2025pht | 70.370254 | -2.865447 | 13.4 | 84.0 | SN | SN IIP, ASASSN-25cw |
| TT Ori | 83.819730 | -4.762387 | 14.0 | 71.0 | YSO | eruptive variable, Orion type |
| IRAS 23226-3843 | 351.350833 | -38.446978 | 14.4 | 148.0 | AGN | changinglook AGN |
| Gaia19dbf | 178.699417 | -64.491850 | 14.5 | 78.0 | Unknown | Possibly a YSO |
| V416Ori | 83.838583 | -5.703439 | 14.6 | 72.0 | YSO | variable YSO |
| Gaia24ccy | 243.402110 | -25.063310 | 14.9 | 94.0 | YSO | known YSO brightens by 2 mag |
| ASASSN-25cd | 277.969917 | -28.807539 | 15.1 | 125.0 | Unknown | A Deep, Ongoing, Dipping Event |
| Gaia23bsf | 276.583080 | -14.036970 | 15.3 | 124.0 | Unknown | Star getting brighter very slowly |
| SN 2025rpt | 28.589626 | -2.618816 | 15.7 | 125.0 | SN | Astro-COLIBRI target |
| Gaia24amo | 249.148921 | -53.749919 | 15.7 | 102.0 | Microlensing Event | candidate microlensing event, with the second peak |
| HE0413_4031 | 63.810269 | -40.394754 | 15.9 | 97.0 | QSO | Long term variable quasar for monitoring |
| PKS0454-234 | 74.263250 | -23.414450 | 15.9 | 85.0 | QSO | long time monitoring for ROTUZ team |
| mrk1018 | 31.566619 | -0.291455 | 16.2 | 122.0 | AGN | changinglook AGN |
| PMNJ0730-6602 | 112.706495 | -66.038578 | 16.4 | 83.0 | AGN | IAUZ Target |
| 1RXS_J173546.9-302859 | 263.946400 | -30.482900 | 16.4 | 113.0 | Unknown | Possible X-ray transient from SVOM |
| CTS_C30.10 | 71.833281 | -45.627319 | 16.7 | 92.0 | QSO | Long term variable quasar for monitoring |
| Gaia24csq | 286.710270 | -26.939590 | 16.7 | 133.0 | Unknown | potential slowly rising microlensing event |
| AT2024zkr | 28.595650 | -5.997339 | 16.8 | 126.0 | AGN | BFF candidate, spectrum shows HeII and NIII, ePESSTO+ target |
| HE0435-4312 | 69.299139 | -43.101189 | 17.0 | 93.0 | QSO | Long term variable quasar for monitoring |
| Mkn590 | 33.639835 | -0.766717 | 17.1 | 120.0 | QSO | Flaring quasar |
| AT2023xbu | 58.991412 | -16.412656 | 17.2 | 98.0 | AGN | candidate repeating TDE, other name ZTF22abveoak, ePESSTO target |
| V1725 Sco | 256.693920 | -35.468560 | 17.2 | 107.0 | Nova | Astro-COLIBRI target, nova, still on-going |
| 4FGL J1603.8-4903 | 240.966507 | -49.061699 | 17.5 | 96.0 | Unknown | Astro-COLIBRI target |
| TDE2025qhf | 327.178246 | -13.289133 | 17.8 | 173.0 | TDE | TDE-H-He candidate |
| ZTF20abendxc | 281.224708 | -8.538111 | 17.8 | 128.0 | YSO | Possibly eruptive YSO |
| Gaia23cnm | 285.322920 | -18.717130 | 17.9 | 132.0 | Unknown | slow and long rise, possible microlensing or YSO |
Last week's total of images processed: 5418 (4642 with success).
Last week's targets observed:
| camera | target_names |
|---|---|
| Adonis_G2-1600 | Gaia24azc, TCrB, Gaia24ayd, Gaia24azi, AM_Her, TabbysStar, LS I +61 302, Gaia24dfv |
| EEye_QHY268M | Gaia24ctf, AT2025mau, Gaia24csq, Gaia23cnm, AT2024kwu, Gaia24aup |
| LCOGT-CTIO-1m_4K | 3I_ATLAS-lsc-1m0a-2025-07-29-60885.0665005, 3I_ATLAS-lsc-1m0a-2025-07-23-60879.987557, 3I_ATLAS-lsc-1m0a-2025-07-22-60878.0910747, 3I_ATLAS-lsc-1m0a-2025-07-25-60881.1179863, 3I_ATLAS-lsc-1m0a-2025-07-18-60874.0807475, 3I_ATLAS-lsc-1m0a-2025-07-26-60882.0703938, 3I_ATLAS-lsc-1m0a-2025-07-16-60872.1050861, 3I_ATLAS-lsc-1m0a-2025-07-19-60875.9845139, 3I_ATLAS-lsc-1m0a-2025-07-21-60877.0505701, 3I_ATLAS-lsc-1m0a-2025-07-18-60874.9973379, 3I_ATLAS-lsc-1m0a-2025-07-17-60873.1835634, 3I_ATLAS-lsc-1m0a-2025-07-14-60870.0921812 |
| LCOGT-CTIO-40cm_QHY600M | 3I_ATLAS-lsc-0m4a-2025-07-21-60877.0337836, 3I_ATLAS-lsc-0m4a-2025-07-18-60874.9913654, 3I_ATLAS-lsc-0m4a-2025-07-22-60878.0603499, 3I_ATLAS-lsc-0m4a-2025-07-24-60880.9816054, 3I_ATLAS-lsc-0m4a-2025-07-25-60881.994828, 3I_ATLAS-lsc-0m4a-2025-07-29-60885.0549765, 3I_ATLAS-lsc-0m4a-2025-07-18-60874.0653066, 3I_ATLAS-lsc-0m4a-2025-07-12-60868.0017966, 3I_ATLAS-lsc-0m4a-2025-07-24-60880.0285805, 3I_ATLAS-lsc-0m4a-2025-07-16-60872.099681, 3I_ATLAS-lsc-0m4a-2025-07-17-60873.0039577 |
| LCOGT-HO-40cm_QHY600M | 3I_ATLAS-ogg-0m4c-2025-07-18-60874.3212512, 3I_ATLAS-ogg-0m4b-2025-07-21-60877.2609328, 3I_ATLAS-ogg-0m4c-2025-07-25-60881.3079827, 3I_ATLAS-ogg-0m4b-2025-07-20-60876.2611269, 3I_ATLAS-ogg-0m4c-2025-07-16-60872.2832622, 3I_ATLAS-ogg-0m4b-2025-07-23-60879.3313948, 3I_ATLAS-ogg-0m4b-2025-07-26-60882.2550678, 3I_ATLAS-ogg-0m4c-2025-07-17-60873.2726006, 3I_ATLAS-ogg-0m4b-2025-07-15-60871.2955389 |
| LCOGT-SAAO-1m_4K | 3I_ATLAS-cpt-1m0a-2025-07-19-60875.7345196, 3I_ATLAS-cpt-1m0a-2025-07-12-60868.9809159, 3I_ATLAS-cpt-1m0a-2025-07-20-60876.7090377, 3I_ATLAS-cpt-1m0a-2025-07-29-60885.7464276, 3I_ATLAS-cpt-1m0a-2025-07-28-60884.7054809, 3I_ATLAS-cpt-1m0a-2025-07-26-60882.8493823, 3I_ATLAS-cpt-1m0a-2025-07-25-60881.9029974 |
| LCOGT-SAAO-40cm_QHY600M | 3I_ATLAS-cpt-0m4a-2025-07-22-60878.9426464, 3I_ATLAS-cpt-0m4a-2025-07-20-60876.7287179, 3I_ATLAS-cpt-0m4a-2025-07-18-60874.7497869, 3I_ATLAS-cpt-0m4a-2025-07-19-60875.7964241, 3I_ATLAS-cpt-0m4a-2025-07-23-60879.7134461, 3I_ATLAS-cpt-0m4a-2025-07-14-60870.7386955, 3I_ATLAS-cpt-0m4a-2025-07-25-60881.8567609 |
| LCOGT-SS-1m_4K | 3I_ATLAS-coj-1m0a-2025-07-12-60868.5074966, 3I_ATLAS-coj-1m0a-2025-07-13-60869.3768638, 3I_ATLAS-coj-1m0a-2025-07-13-60869.4967438 |
| LCOGT-SS-40cm_QHY600M | 3I_ATLAS-coj-0m4a-2025-07-18-60874.4600701, 3I_ATLAS-coj-0m4a-2025-07-24-60880.481719, 3I_ATLAS-coj-0m4a-2025-07-13-60869.5157414, 3I_ATLAS-coj-0m4a-2025-07-23-60879.466515, 3I_ATLAS-coj-0m4a-2025-07-17-60873.6128438, 3I_ATLAS-coj-0m4b-2025-07-21-60877.5062862, 3I_ATLAS-coj-0m4b-2025-07-20-60876.4404998, 3I_ATLAS-coj-0m4b-2025-07-19-60875.5110387, 3I_ATLAS-coj-0m4a-2025-07-15-60871.6055119, 3I_ATLAS-coj-0m4a-2025-07-16-60872.4184195, 3I_ATLAS-coj-0m4a-2025-07-14-60870.4664002 |
| LCOGT-Teide-1m_4K | 3I_ATLAS-tfn-1m0a-2025-07-31, 3I_ATLAS-tfn-1m0a-2025-07-30-60886.8722828 |
| LW_Seestar-S50 | BL_Lac |
| OAUJ-CDK500_U47 | AT2025nsa, SN2025bof, Gaia24ayd, AT2025aox, Gaia24bux, NGC5683-Seyfert, AT2025mau, Gaia23dqt, SN2024afyu, GROJ2058+42, Gaia24dfv, Gaia21fji |
| PIWNICE90_C4-16000EC | TCrB, 8C0716_714, SN2025bof, Gaia24ayd, Gaia22ang, Gaia24bux, Gaia24dfc, LS I +61 302, Gaia19dke, EECep, ZTF18aarippg, Gaia22awa, AT2024kwu, Gaia21fji |
| PROMPT-MO-1_Apogee | ASASSN-24fw |
| ROAD_FLI-KAF-16803 | HD 269006, HD 269858, S Dor |
| ROAD_QHY600M | TCrB, OY Mon, ASASSN-24fw, V1413 Aql, ASASSN-21qj, AT2025rwt, AR_Pav, HD 269006, ASASSN-25cy, ASASSN-21js, TCP J18022164-3310319, AT2025ggn, AT 2025nlr, V348 Sgr, SN2025pht, ASASSN-25db |
| SOAB_ZWO-ASI2600MM | mrk1018, TCrB, LS I +61 302, Gaia21fji, Gaia4323024741104637568, SN2025bof, BL_Lac, V1413 Aql, SN2024afyu, SDSS J013136.44+130331.0, AT2024kwu, KS1947+300, Gaia24bux, AM_Her, Mkn590, AT2025oas, Gaia21drn, 8C0716_714, Gaia24dfc, ZTF18aarippg |
| SUTO-Otivar_ASI1600MM | TCrB, 1H1936+541 (BD+53 2262), 2S0114+65, V1413 Aql, NGC5683-Seyfert, LS I +61 302, 1H2202+501 (BD+49 3718), Gaia24dov, ZTF18aavyooe, RXJ0441.0+4431, 4U2206+54 |
| Slooh-AU_FLI-KAF-16803 | IRAS 23226-3843 |
| Slooh-CL_FLI-KAF-16803 | 1RXS_J173546.9-302859, Gaia24csq, IRAS 23226-3843 |
| UCLO-C14EAST_PL9000 | Gaia21efs, Gaia21azb |
| ZAO_G2-1600 | KS1947+300 |
Last week's fits uploads score (sorted by count)
| observatory-user | count |
|---|---|
| Franz-Josef Hambsch (ROAD_QHY600M) | 2158 |
| Franz-Josef Hambsch (ROAD_FLI-KAF-16803) | 1134 |
| Agnieszka Gurgul (PIWNICE90_C4-16000EC) | 657 |
| Sebastian Kurowski (SOAB_ZWO-ASI2600MM) | 251 |
| Alicja Pucek (OAUJ-CDK500_U47) | 229 |
| Adam Popowicz (SUTO-Otivar_ASI1600MM) | 139 |
| Steve Fossey (UCLO-C14EAST_PL9000) | 119 |
| Staszek Zola (OAUJ-CDK500_U47) | 91 |
| Charles Galdies (ZAO_G2-1600) | 77 |
| Nicholas Rattenbury (Slooh-CL_FLI-KAF-16803) | 67 |
| Franky Dubois (Adonis_G2-1600) | 64 |
| Fraser Gillan (LCOGT-CTIO-1m_4K) | 60 |
| Fraser Gillan (LCOGT-CTIO-40cm_QHY600M) | 55 |
| Fraser Gillan (LCOGT-SS-40cm_QHY600M) | 55 |
| Fraser Gillan (LCOGT-HO-40cm_QHY600M) | 45 |
| Sebastian Kurowski (OAUJ-CDK500_U47) | 40 |
| Fraser Gillan (LCOGT-SAAO-40cm_QHY600M) | 35 |
| Fraser Gillan (LCOGT-SAAO-1m_4K) | 35 |
| Sjoerd Dufoer (EEye_QHY268M) | 24 |
| Zbigniew Grabowski (LW_Seestar-S50) | 21 |
| Fraser Gillan (LCOGT-SS-1m_4K) | 15 |
| Nicholas Rattenbury (Slooh-AU_FLI-KAF-16803) | 14 |
| Jacek Drazkowski (LW_Seestar-S50) | 12 |
| Fraser Gillan (LCOGT-Teide-1m_4K) | 10 |
| Staszek Zola (PROMPT-MO-1_Apogee) | 8 |
| Yauheni Stsefanenka (OAUJ-CDK500_U47) | 2 |
Top 5 data uploaders!
| name | count |
|---|---|
| Franz-Josef Hambsch | 3292 |
| Agnieszka Gurgul | 657 |
| Fraser Gillan | 310 |
| Sebastian Kurowski | 291 |
| Alicja Pucek | 229 |
Clear skies!
Your BHTOM Team
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