BHTOM Targets for 25 May, 2026
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wyrz...@gmail.com
May 25, 2026, 9:21:33 AMMay 25
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Greetings from the BHTOM Automated Newsletter!
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As of 2026-05-25 13:11:09.107629+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 |
|---|---|---|---|---|---|---|
| SN 2026mho | 301.909587 | -21.118444 | 17.8 | 124.0 | SN | Closest undisputed Type IIn SN in the last decade. |
| AT2026muq | 242.613837 | -11.994669 | 18.7 | 171.0 | Unknown | Possible Supernova candidate observed by ZTF and LSST |
| AT2026chz | 216.328287 | 3.056381 | 19.3 | 146.0 | Unknown | Identified as SN by Lasair |
| LSST_313932564866269223 | 8.573676 | -43.573316 | 20.1 | 81.0 | Unknown | LSST Supernova candidate |
| LSST_313673106975096841 | 7.307536 | -44.331568 | 20.2 | 82.0 | Unknown | LSST rising transient; 0.5" from the AGN core; Gaia DR3 4980275919882664960 AGN |
| LSST_170411112000913487 | 151.163533 | 2.507451 | 21.3 | 89.0 | Unknown | LSST transient candidate. Rising, possible SN embedded in its host galaxy. |
| AT 2026lxf | 225.771540 | 22.034330 | 25.2 | 134.0 | CV | dwarf nova |
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 |
|---|---|---|---|---|---|---|
| 1H2202+501 (BD+49 3718) | 330.409176 | 50.167954 | 9.0 | 75.0 | XRB | optical counterpart of the Be X-Ray Binary |
| TCrB | 239.875676 | 25.920170 | 9.4 | 133.0 | Nova | recurent nova predicted to explode 2024/2025 |
| 1H1936+541 (BD+53 2262) | 293.217949 | 53.879297 | 10.3 | 93.0 | XRB | optical counterpart of the Be X-Ray Binary |
| V1413 Aql | 285.945155 | 16.438048 | 10.4 | 123.0 | Symbiotic star | known symbiotic star for regular monitoring |
| EECep | 332.344808 | 55.756738 | 10.6 | 72.0 | Variable star-other | Long period eclipsing binary with accretion disk, potential in-between eclipses |
| 4U2206+54 | 331.984320 | 54.518447 | 10.9 | 73.0 | XRB | Be X-ray binary |
| TCP J21220926+4926242 | 320.537548 | 49.440144 | 12.2 | 81.0 | Unknown | Bright FUor or EXor, or in between. |
| AM_Her | 274.055228 | 49.867989 | 13.0 | 104.0 | CV | Target for joint optical-radio observations |
| V1117 Her | 249.776779 | 9.798698 | 13.2 | 148.0 | Unknown | PMS star, Herbig Ae star |
| SAXJ2103.5+4545 | 315.898792 | 45.751547 | 13.7 | 86.0 | XRB | Be X-ray binary |
| Mrk 817 | 219.092017 | 58.794299 | 13.7 | 98.0 | Unknown | Seyfert 1 AGN |
| SN 2026fov | 337.113504 | 30.298461 | 13.9 | 75.0 | SN | Closeby Type II supernova at 11.82 Mpc |
| KS1947+300 | 297.397850 | 30.208827 | 13.9 | 106.0 | XRB | Be X-ray binary |
| BL_Lac | 330.680381 | 42.277772 | 14.0 | 77.0 | BL Lac | famous variable blazar |
| GROJ2058+42 | 314.698071 | 41.776995 | 14.0 | 88.0 | XRB | Be X-ray binary |
| Gaia21fji | 315.992250 | 50.244500 | 14.3 | 84.0 | YSO | Optical monitoring of Gaia- and ZTF-alerted candidate eruptive YSOs |
| Mrk 841 | 226.004963 | 10.437732 | 14.7 | 145.0 | AGN | changinglook AGN |
| IGRJ21343+4738 | 323.584883 | 47.633391 | 14.8 | 80.0 | XRB | Be X-ray binary |
| SN 2026kie | 163.152190 | 22.931718 | 15.0 | 92.0 | SN | Astro-COLIBRI target |
| SN 2026fvx | 183.742221 | 63.787892 | 15.1 | 84.0 | SN | nearby supernova Type Ia |
| SN 2026kid | 228.988442 | 56.308914 | 15.2 | 102.0 | SN | Closeby Type II supernova at 14 Mpc. Strong CSM interaction |
| AT2026lck | 280.993979 | 1.880128 | 15.3 | 135.0 | Nova | Recurrent nova in the Milky Way |
| NGC5683-Seyfert | 218.718578 | 48.661870 | 15.5 | 108.0 | AGN | active nucleus of a nearby galaxy for frequent monitoring |
| ZTF18aarippg | 217.566838 | 23.062372 | 15.7 | 130.0 | QSO | Tick-Tok possibly merging Super Massive Black Hole binary |
| SN 2026dix | 177.655950 | 55.353589 | 16.1 | 87.0 | SN | Closeby IIb supernova |
| Gaia4323024741104637568 | 292.501025 | 17.933682 | 16.4 | 117.0 | Unknown | Possibly eruptive YSO which is approaching to the quiescence |
| SN_2026jlm | 215.416237 | 13.229544 | 16.5 | 137.0 | SN | Nearby Supernova Type Ia |
| SN 2026gwx | 172.045321 | 25.656667 | 16.6 | 98.0 | SN | New nearby SN Ib with a redshift of 0.009 |
| Q0957+561_A | 150.336216 | 55.898776 | 16.8 | 72.0 | QSO | firstly confirmed lensed quasar (double image), image A (top) |
| AT2025sqe | 288.715125 | 8.001778 | 16.9 | 125.0 | Unknown | slow galactic very red transient |
| SN 2026fjc | 195.179418 | 37.310053 | 17.0 | 107.0 | SN | SN Ia (according to TNS) |
| SN 2025aico | 172.318154 | 20.585703 | 17.3 | 101.0 | SN | Young SN classified as a II or IIb |
| AT2026bti | 210.693421 | 24.826742 | 17.4 | 125.0 | SN | optical transient |
| Gaia16aoz | 162.115140 | 71.726660 | 17.6 | 73.0 | QSO | QSO with a long-term and short-term variability |
| SDSSJ094533.99+100950.1 | 146.391622 | 10.163917 | 17.8 | 82.0 | QSO | Long term variable quasar for monitoring |
| name | ra | dec | mag_last | sun_separation | classification | description |
|---|---|---|---|---|---|---|
| HD 98800 | 170.521620 | -24.777768 | 10.9 | 115.0 | YSO | Pre-main sequence quadruple system (AaAb + BaBb) with circumbinary (BaBb) disk to eclipse AaAb |
| GaiaDR3_4263591911398361472 | 289.926500 | -0.049900 | 11.0 | 128.0 | Variable star-other | This target is part of a paper about I am writing a revision for, and I would like to confirm if it is a binary system or not. It has a period of ~1.435 days (if a binary, ~2x1.435 days) |
| AT 2025nlr | 227.013640 | -40.141550 | 12.1 | 157.0 | Nova | Astro-COLIBRI target |
| ngc 3783 | 174.757132 | -37.738611 | 13.6 | 121.0 | AGN | Nearby Seyfert 1 galaxy, active galactic nucleus, interesting for X-ray, high cadence data neeeded, potentially flaring |
| ASASSN-26bp | 225.854950 | -63.189410 | 14.0 | 136.0 | Star | Star Undergoing Deep Dimming Events |
| V4141 Sgr | 267.599257 | -19.895328 | 14.1 | 156.0 | Symbiotic star | symbiotic star |
| V5856 Sgr | 275.217710 | -28.370030 | 14.2 | 149.0 | Nova | CV and Nova outburts |
| NGC 6814 | 295.669109 | -10.323641 | 14.3 | 127.0 | AGN | Long term monitored AGN |
| IRAS 23226-3843 | 351.350833 | -38.446978 | 14.4 | 89.0 | AGN | changinglook AGN |
| SN2026gzx | 178.487196 | -23.162647 | 14.9 | 122.0 | SN | SN Ia, bright nearby supernova |
| Nova Centauri 2025 | 219.340667 | -58.794667 | 15.0 | 139.0 | Nova | potential nova from ASASSN, V1935 Cen |
| ASASSN-26af | 82.501958 | -66.724833 | 15.2 | 89.0 | Unknown | Undergoing Deep Dimming Events in the LMC |
| AT2026ayt | 141.847458 | -32.008578 | 15.3 | 93.0 | SN | Type II SN |
| Nova Sagittarii 2025 no.4 | 270.969917 | -31.456667 | 15.3 | 152.0 | Nova | Nova Sgr 2025 No. 4 is TCP J18035290-3127298 is TCP J18035278-3127240 |
| Gaia19dbf | 178.699417 | -64.491850 | 16.1 | 120.0 | Unknown | Possibly a YSO |
| ASASSN-25cd | 277.969917 | -28.807539 | 16.4 | 146.0 | Unknown | A Deep, Ongoing, Dipping Event |
| PMNJ0730-6602 | 112.706495 | -66.038578 | 16.4 | 95.0 | AGN | IAUZ Target |
| AR Sco | 245.447013 | -22.886218 | 16.4 | 176.0 | CV | White Dwarf pulsar |
| AT2025xvc | 85.526933 | -67.018517 | 16.6 | 90.0 | Nova | possibile bright nova or CV in LMC from GOTO,TNS |
| CTCVJ2056-3014 | 314.217286 | -30.244198 | 16.6 | 115.0 | CV | fast spinning WD in a CV |
| Gaia24csq | 286.710270 | -26.939590 | 16.9 | 139.0 | Unknown | potential slowly rising microlensing event |
| AT2026lau | 164.921043 | -10.693675 | 16.9 | 106.0 | Unknown | transient optical event near the galactic core |
| AT 2025acve | 270.700667 | -5.976583 | 17.3 | 148.0 | Unknown | Unclassified optical transient discovered by XOSS, potential microlensing event |
| Gaia24amo | 249.148921 | -53.749919 | 17.3 | 147.0 | Microlensing Event | candidate microlensing event, with the second peak |
| AT2026kis | 315.044821 | -32.284722 | 17.3 | 115.0 | Unknown | rising bright transient; 16.5 mag in GOTO-L and ATLAS-o band |
| ZTF20abendxc | 281.224708 | -8.538111 | 17.4 | 140.0 | YSO | Possibly eruptive YSO |
| Gaia23cnm | 285.322920 | -18.717130 | 17.4 | 139.0 | Unknown | slow and long rise, possible microlensing or YSO |
| SN2026kmo | 146.675146 | -14.867561 | 17.7 | 91.0 | SN | Young Type II supernova |
| AT2026loo | 155.518446 | -10.510631 | 17.7 | 97.0 | TDE | ePESSTO+ target TDE |
| ASASSN-25fd | 187.851667 | -59.119028 | 17.8 | 126.0 | Nova | Nova in Crux, PNV J12312434-5907133 |
Last week's total of images processed: 40651 (37931 with success).
Last week's targets observed:
| camera | target_names |
|---|---|
| Adonis_G2-1600 | SN 2026fvx, TCrB, SN 2026dix, Gaia24azc, AM_Her, TCP J21220926+4926242, AT2025acft, TabbysStar, Gaia24dfv, Gaia24ayd |
| AndromedaC14_QHY600M | SN 2026fvx, 1H1936+541 (BD+53 2262), AT2025acft, 1H2202+501 (BD+49 3718) |
| BIALKOW_ANDOR-DW432 | TCrB, 8C0716_714, LSST_170046089928376424, SN 2026dix |
| EEye_QHY268M | AT 2025acve, AT2025acft, Q0957+561_A, Gaia24csq |
| HAO68_G2-1600 | ZTF18aarippg, SN 2026fvx, TCrB, SN 2026kid, AT2025abao |
| Kryoneri-1.2_Andor-Zyla | ZTF18aarippg, Mrk 841, TCrB, SN 2026kid, AT2026dmu |
| LCOGT-CTIO-1m_4K | Gaia24amo, OGLE-2026-BLG-0555, ASASSN-26cp, AT2026ayt |
| LCOGT-HO-2m_Muscat | MAXI J1803-298, 4U 1957+11, MAXI J1820+070, XTE J1728-295, MAXI J1659-152, V4641 Sgr, GRO J1719-24 |
| LCOGT-SAAO-1m_4K | SN2026kmo, OGLE-2026-BLG-0555, GaiaDR3_4254224690815185408 |
| LCOGT-SS-1m_4K | Gaia24amo, OGLE-2026-BLG-0555, OGLE-2026-BLG-0128 |
| LCOGT-SS-2m_Muscat | Aql X-1 |
| LCOGT-Teide-1m_4K | GaiaDR3_4254224690815185408 |
| LCOGT-Teide-40cm_QHY600M | OJ_287 |
| MOLETAI-35cm_CCD4710 | ZTF18aarippg, 8C0716_714, TCrB, SN 2026dix, V1117 Her, AM_Her, AT2025acft |
| OAUJ-CDK500_U47 | SN 2026fvx, AT2026cex, SN 2026fjc, SN 2026dix, Gaia24azc, SN2024afyu, GROJ2058+42, AT2025abao |
| Ostrowik-60-cm_SOFIA_E2V | ER_UMa, 8C0716_714, RZ_LMi, HAT-P-36b |
| PIRATE_FLI | AT2026lck |
| PROMPT-MO-1_Apogee | SN2026gzx, AT2026ayt |
| PROMPT5_Apogee | SN2026gzx, ASASSN-26bl, AT2026ayt |
| ROAD40_FLI-KAF-16803 | WX Cen, FO_Aqr |
| ROAD40_QHY600M | HD 98800, Gaia19eyy, TCrB, Gaia24dhn, V1117 Her, Gaia23cpd, EX Lup, ASASSN-25db, ASASSN-24fw, ASASSN-21qj, Gaia24ccy, ASASSN-21js, WX Cen, HZ Pup, ASASSN-25bv, Gaia23dnm, FO_Aqr |
| ROADC14_QHY600M | Nova Centauri 2025, AT 2025nlr, ASASSN-25eh, Nova Velorum 2025, GaiaDR3_4263591911398361472, V1413 Aql, ASASSN-26cm, V4141 Sgr, ASASSN-25ei, V5856 Sgr, ASASSN-26cp, ASASSN-25cy, AR_Pav, ASASSN-26bp, V1280 Sco, Nova Sagittarii 2025 no.4 |
| SUTO-Otivar_ASI1600MM | TCrB, HD 312919, HAT 622-924 |
| Salerno_Observatory_FLI | SN 2026fvx, Mrk 841, Mrk 817, TCrB, AM_Her, V1413 Aql, EECep, Gaia21fji, TCP J21220926+4926242, AT2025acft, GROJ2058+42, SAXJ2103.5+4545, SN 2026kid, Gaia24ayd |
| Seestar-S30 | BL_Lac, 8C0716_714 |
| Seestar-S50 | SN 2026fvx, 8C0716_714, OJ_287, TCrB, AE_UMa, SN_2026jlm, AM_Her, SN 2026fov, AT 2026lxf, AT2026lck, SN 2026kid, BL_Lac, Gaia21esb |
| TTT2_FERVOR-M | 2026knt |
| TTT3_COLORS | AT2026loo |
Last week's fits uploads score (sorted by count)
| observatory-user | count |
|---|---|
| Franz-Josef Hambsch (ROAD40_QHY600M) | 27343 |
| Franz-Josef Hambsch (ROAD40_FLI-KAF-16803) | 5780 |
| Weronika Skrobacz (Seestar-S50) | 2145 |
| Franz-Josef Hambsch (ROADC14_QHY600M) | 1782 |
| Lukasz Wyrzykowski (Ostrowik-60-cm_SOFIA_E2V) | 854 |
| Valerio Bozza (Salerno_Observatory_FLI) | 815 |
| Staszek Zola (OAUJ-CDK500_U47) | 301 |
| Wojciech Szewczuk (BIALKOW_ANDOR-DW432) | 293 |
| Dawid Moździerski (BIALKOW_ANDOR-DW432) | 178 |
| Amelia Rzepka (BIALKOW_ANDOR-DW432) | 174 |
| Andżelika Jania (BIALKOW_ANDOR-DW432) | 174 |
| Przemyslaw J. Mikolajczyk (BIALKOW_ANDOR-DW432) | 129 |
| Justas Zdanavicius (MOLETAI-35cm_CCD4710) | 104 |
| Franky Dubois (Adonis_G2-1600) | 87 |
| Rachel Street (LCOGT-CTIO-1m_4K) | 58 |
| Jacek Drazkowski (Seestar-S50) | 50 |
| Dimitrios Athanasopoulos (Kryoneri-1.2_Andor-Zyla) | 49 |
| Staszek Zola (PROMPT5_Apogee) | 37 |
| Franz-Josef Hambsch (AndromedaC14_QHY600M) | 30 |
| Fraser Lewis (LCOGT-HO-2m_Muscat) | 28 |
| Adam Popowicz (SUTO-Otivar_ASI1600MM) | 24 |
| Rachel Street (LCOGT-SAAO-1m_4K) | 24 |
| Rachel Street (LCOGT-SS-1m_4K) | 21 |
| Evangelos Gkiokas (Kryoneri-1.2_Andor-Zyla) | 20 |
| Sjoerd Dufoer (EEye_QHY268M) | 18 |
| Jacek Drazkowski (Seestar-S30) | 18 |
| Jan Kåre Trandem Qvam (HAO68_G2-1600) | 16 |
| Mauritz Wicker (LCOGT-Teide-1m_4K) | 15 |
| Staszek Zola (PROMPT-MO-1_Apogee) | 15 |
| Astro Koluszki (Seestar-S50) | 14 |
| Eduardo Concepcion (TTT3_COLORS) | 8 |
| Eduardo Concepcion (TTT2_FERVOR-M) | 8 |
| Mauritz Wicker (LCOGT-SAAO-1m_4K) | 7 |
| Joysankar Majumdar (LCOGT-CTIO-1m_4K) | 6 |
| Mauritz Wicker (LCOGT-CTIO-1m_4K) | 6 |
| Fraser Lewis (LCOGT-SS-2m_Muscat) | 4 |
| Priscila Pessi (LCOGT-SAAO-1m_4K) | 4 |
| Krzysztof Słowik (Seestar-S50) | 4 |
| Lukasz Wyrzykowski (LCOGT-Teide-40cm_QHY600M) | 3 |
| Mauritz Wicker (LCOGT-SS-1m_4K) | 3 |
| cristina sironi sommer (PIRATE_FLI) | 2 |
Top 5 data uploaders!
| name | count |
|---|---|
| Franz-Josef Hambsch | 34935 |
| Weronika Skrobacz | 2145 |
| Lukasz Wyrzykowski | 857 |
| Valerio Bozza | 815 |
| Staszek Zola | 353 |
Clear skies!
Your BHTOM Team
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