BHTOM Targets for 20 April, 2026
15 views
Skip to first unread message
wyrz...@gmail.com
Apr 20, 2026, 4:38:18 AMApr 20
to bhtomt...@googlegroups.com
Hello,
Top 5 data uploaders!
Clear skies!
Your BHTOM Team
bhtom.space
Greetings from the BHTOM Automated Newsletter!
Please note the main server name change from bh-tom2.astrolabs.pl to bh-tom2.astrouw.edu.pl. The alias bhtom.space is still valid.
As of 2026-04-20 08:35:40.088397+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 2026fjc | 195.179418 | 37.310053 | 14.4 | 130.0 | SN | SN Ia (according to TNS) |
| AT 2026hyy | 244.150013 | 44.874870 | 15.6 | 115.0 | CV | not classified more precisely, further observations are needed |
| 1RXS J1525069-032647 | 231.278635 | -3.448342 | 15.6 | 155.0 | CV | AM Herculis star in Serpens. Magnitudo range: 15.5 - 19 CV. Data from AAVSO |
| ASASSN-26cp | 242.076625 | -64.185778 | 16.1 | 122.0 | Microlensing Event | Possible Microlensing Event, matches to GAIA |
| 2MASS J22481357+6400230 | 342.056580 | 64.006400 | 16.3 | 61.0 | CV | AM Her-type (VSX AAVSO); mag. range: 15.4 - fainter than 17.2 V; lack of reliable references |
| 2RXS J1942026+781550 | 295.504250 | 78.264690 | 18.1 | 79.0 | CV | AM Her-type CV (VSX AAVSO) + eclipsing; mag. range: 17.6 - 21.3 r; classified by Mariusz Bajer (AAVSO) |
| 2RXS J0647092+312028 | 101.781250 | 31.339750 | 18.5 | 71.0 | CV | AM Herculis star in Gemini. Magnitudo range: 17.1 - 20.8 r. Data from AAVSO |
| 2MASS J07202922+4916255 | 110.121785 | 49.273756 | 18.6 | 76.0 | CV | AM Herculis star in Lynx. Magnitudo range: 16.3 - 19. Gaia parallax - 2.05~0.15 mas. Data from AAVSO |
| ZTF17aaaheoj | 87.127760 | 53.734030 | 18.9 | 63.0 | CV | AM Her-type CV; mag. range: 16.1 - 20.8 r; eclipses up to 3 mag (amplitude?) can be seen, according to Gabriel Murawski remark (AAVSO) |
| LSST_170235219334922248 | 148.474280 | 1.718237 | 19.0 | 120.0 | Unknown | LSST transient candidate, rising for a week or so, currently at ~19.5mag in g band, SN candidate |
| 1RXS J2159142+610514 | 329.815920 | 61.089030 | 19.2 | 65.0 | CV | AM Her-type CV (VSX AAVSO); mag. range: 17.5 r - 21 B; maximum magnitude from IPHAS |
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 | 9.2 | 131.0 | Nova | recurent nova predicted to explode 2024/2025 |
| 1H1936+541 (BD+53 2262) | 293.217949 | 53.879297 | 10.2 | 83.0 | XRB | optical counterpart of the Be X-Ray Binary |
| V1413 Aql | 285.945155 | 16.438048 | 11.0 | 98.0 | Symbiotic star | known symbiotic star for regular monitoring |
| V1117 Her | 249.776779 | 9.798698 | 12.4 | 133.0 | Unknown | PMS star, Herbig Ae star |
| AM_Her | 274.055228 | 49.867989 | 13.3 | 96.0 | CV | Target for joint optical-radio observations |
| 8C0716_714 | 110.472701 | 71.343434 | 13.7 | 77.0 | QSO | checking of ~1.7-days periodic variability and quasi-periodic variability of ~24 days |
| SN 2026fvx | 183.742221 | 63.787892 | 13.8 | 103.0 | SN | nearby supernova Type Ia |
| KS1947+300 | 297.397850 | 30.208827 | 13.8 | 85.0 | XRB | Be X-ray binary |
| Mrk 841 | 226.004963 | 10.437732 | 14.4 | 152.0 | AGN | changinglook AGN |
| AT2025acft | 295.939833 | 40.367889 | 15.0 | 84.0 | Microlensing Event | Candidate long microlensing event from Chinese KATS survey, KATS25V002 |
| AT2025sqe | 288.715125 | 8.001778 | 15.2 | 97.0 | Unknown | slow galactic very red transient |
| NGC5683-Seyfert | 218.718578 | 48.661870 | 15.4 | 119.0 | AGN | active nucleus of a nearby galaxy for frequent monitoring |
| ZTF18aarippg | 217.566838 | 23.062372 | 15.5 | 144.0 | QSO | Tick-Tok possibly merging Super Massive Black Hole binary |
| SN 2026dix | 177.655950 | 55.353589 | 15.6 | 109.0 | Unknown | Closeby IIb supernova |
| Mrk 817 | 219.092017 | 58.794299 | 16.2 | 109.0 | Unknown | Seyfert 1 AGN |
| Gaia4323024741104637568 | 292.501025 | 17.933682 | 16.5 | 91.0 | Unknown | Possibly eruptive YSO which is approaching to the quiescence |
| Q0957+561_A | 150.336216 | 55.898776 | 16.9 | 98.0 | QSO | firstly confirmed lensed quasar (double image), image A (top) |
| AT2026bti | 210.693421 | 24.826742 | 17.3 | 144.0 | Unknown | optical transient |
| Gaia16aoz | 162.115140 | 71.726660 | 17.3 | 92.0 | QSO | QSO with a long-term and short-term variability |
| Gaia23bab | 286.111170 | 4.399270 | 17.5 | 100.0 | Unknown | repeated outburst in a candidate YSO |
| SDSSJ094533.99+100950.1 | 146.391622 | 10.163917 | 17.6 | 115.0 | QSO | Long term variable quasar for monitoring |
| SN2024afyu | 258.429383 | 7.625256 | 17.8 | 126.0 | SN | Interesting long-term Supernova |
| name | ra | dec | mag_last | sun_separation | classification | description |
|---|---|---|---|---|---|---|
| GaiaDR3_4263591911398361472 | 289.926500 | -0.049900 | 11.0 | 98.0 | 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) |
| HD54740 | 107.409460 | -11.037909 | 11.1 | 82.0 | Variable star-other | variable star with period 0.856265462d |
| HD 98800 | 170.521620 | -24.777768 | 11.6 | 142.0 | YSO | Pre-main sequence quadruple system (AaAb + BaBb) with circumbinary (BaBb) disk to eclipse AaAb |
| MXB0656-072 | 104.572033 | -7.209779 | 11.9 | 79.0 | XRB | Be X-ray binary |
| SN2026gzx | 178.487196 | -23.162647 | 12.4 | 150.0 | SN | SN Ia, bright nearby supernova |
| ASASSN-26bp | 225.854950 | -63.189410 | 12.9 | 127.0 | Star | Star Undergoing Deep Dimming Events |
| V4141 Sgr | 267.599257 | -19.895328 | 13.0 | 122.0 | Symbiotic star | symbiotic star |
| NGC 6814 | 295.669109 | -10.323641 | 13.5 | 94.0 | AGN | Long term monitored AGN |
| AT 2025nlr | 227.013640 | -40.141550 | 14.1 | 147.0 | Nova | Astro-COLIBRI target |
| ngc 3783 | 174.757132 | -37.738611 | 14.1 | 140.0 | AGN | Nearby Seyfert 1 galaxy, active galactic nucleus, interesting for X-ray, high cadence data neeeded, potentially flaring |
| V5856 Sgr | 275.217710 | -28.370030 | 14.1 | 115.0 | Nova | CV and Nova outburts |
| AT2026ayt | 141.847458 | -32.008578 | 14.1 | 116.0 | Unknown | Optical transient, potential weird supernova |
| Nova Centauri 2025 | 219.340667 | -58.794667 | 14.4 | 132.0 | Nova | potential nova from ASASSN, V1935 Cen |
| ASASSN-26af | 82.501958 | -66.724833 | 14.9 | 88.0 | Unknown | Undergoing Deep Dimming Events in the LMC |
| AR Sco | 245.447013 | -22.886218 | 15.9 | 142.0 | CV | White Dwarf pulsar |
| ZTF20abendxc | 281.224708 | -8.538111 | 16.1 | 108.0 | YSO | Possibly eruptive YSO |
| Nova Sagittarii 2025 no.4 | 270.969917 | -31.456667 | 16.1 | 119.0 | Nova | Nova Sgr 2025 No. 4 is TCP J18035290-3127298 is TCP J18035278-3127240 |
| AT2025xvc | 85.526933 | -67.018517 | 16.2 | 89.0 | Unknown | possibile bright nova or CV in LMC from GOTO,TNS |
| ASASSN-25cd | 277.969917 | -28.807539 | 16.2 | 113.0 | Unknown | A Deep, Ongoing, Dipping Event |
| Gaia19dbf | 178.699417 | -64.491850 | 16.6 | 123.0 | Unknown | Possibly a YSO |
| CTCVJ2056-3014 | 314.217286 | -30.244198 | 16.6 | 82.0 | CV | fast spinning WD in a CV |
| Gaia24csq | 286.710270 | -26.939590 | 16.8 | 105.0 | Unknown | potential slowly rising microlensing event |
| PMNJ0730-6602 | 112.706495 | -66.038578 | 16.9 | 98.0 | AGN | IAUZ Target |
| AT 2025acve | 270.700667 | -5.976583 | 17.1 | 118.0 | Unknown | Unclassified optical transient discovered by XOSS, potential microlensing event |
| Gaia23cnm | 285.322920 | -18.717130 | 17.7 | 105.0 | Unknown | slow and long rise, possible microlensing or YSO |
| Gaia24amo | 249.148921 | -53.749919 | 17.8 | 126.0 | Microlensing Event | candidate microlensing event, with the second peak |
| ASASSN-25fd | 187.851667 | -59.119028 | 17.8 | 130.0 | Nova | Nova in Crux, PNV J12312434-5907133 |
| SN2026afe | 99.860204 | -21.822386 | 17.8 | 78.0 | Unknown | Type SN Ia-pec |
| AT2023aece | 238.433929 | -14.738814 | 17.9 | 150.0 | AGN | nuclear transient with an extremely long lived, rising lightcurve. |
Last week's total of images processed: 7115 (7001 with success).
Last week's targets observed:
| camera | target_names |
|---|---|
| Adonis_G2-1600 | TCP J21220926+4926242, AM_Her, SN 2026dix, SN 2026fvx, Gaia24dja, TabbysStar, TCrB |
| AndromedaC14_QHY600M | TCrB |
| EEye_QHY268M | Gaia24csq, Q0957+561_A, AT 2025acve, AT2025acft |
| HAO68_C3-26000 | AT2025abao |
| LCOGT-CTIO-1m_4K | Gaia24amo, Gaia24csq, ASASSN-26cm, Gaia20ehk, Gaia20fnr, ASASSN-26cp |
| LCOGT-HO-2m_Muscat | Cen X-4, MAXI J1807+132, MAXI J1659-152, MAXI J1820+070, MAXI J1910-057, V4641 Sgr, V1055 Ori, XTE J1728-295, Aql X-1, 4U 1957+11, KV UMa, MAXI J1803-298, GRO J1719-24, V404_Cyg, V406 Vul, V518 Per, V1037Cas, QZ Vul, MAXI J0556-332 |
| LCOGT-SAAO-1m_4K | Gaia20fnr, Gaia24amo |
| LCOGT-SS-1m_4K | AT2026ayt, Gaia24amo, Gaia24csq, Gaia20fnr, ASASSN-26cp |
| LCOGT-SS-2m_Muscat | XTE J1650-500, MAXI J0556-332, GX 339-4, 4U 1957+11, Cen X-4, MAXI J0637-430, MAXI J1659-152, MAXI J1803-298, V406 Vul, MAXI J1807+132, GRO J1719-24, MAXI J1820+070, V4641 Sgr, V1055 Ori, XTE J1550-564, XTE J1728-295, Aql X-1, MAXI J1910-057 |
| Moravian_C3-61000_PRO | SN 2026fvx, SN 2026dix, TCP J21220926+4926242, LSST_170032917163016282 |
| OAUJ-CDK500_U47 | SN 2026dix, SN 2026fvx, AT2025acft, AT2025abao, AT2026cex |
| PROMPT-MO-1_Apogee | Gaia20agb, ASASSN-26bl, SN2026gzx, Gaia22alz |
| PROMPT5_Apogee | AT2026ayt, ASASSN-26bl, SN2026gzx, AT2025sqe |
| Planetarium_Slaskie_Kepler4040 | 1H1936+541 (BD+53 2262), 2MASSJ17300837+6247547, Gaia24dov, ZTF18aarippg |
| ROAD40_QHY600M | ASASSN-25db, OY Mon, Gaia24ccy, ASASSN-21js, ASASSN-21qj, V803Cen, EX Lup, FU Ori, TCrB, V1117 Her, ASASSN-25bv, Gaia19eyy, Gaia23dnm, Gaia24dhn, FO_Aqr, CD-34 11794, HD 312919, TCP J18265456-2719122, HD 98800, ASASSN-24fw |
| ROADC14_QHY600M | Nova Sagittarii 2025 no.4, Nova Velorum 2025, Nova Centauri 2025, ASASSN-25cy, V5856 Sgr, V4141 Sgr, V1280 Sco, 2MASS J07233213+0926393, V1413 Aql, AR_Pav, GaiaDR3_4263591911398361472, Gaia20ehk, AT 2025nlr, TDE2025aarm, ASASSN-26bp |
| RRRT_SBIG-STX16803 | SN 2026fvx |
| SHO_ASI6200MM-Pro | SN 2026ejy |
| SOAB_ZWO-ASI2600MM | SN 2025aico, TCP J21220926+4926242, AM_Her, ZTF18aarippg, AT2025acft, EECep, ZTF20abjgfwm, Mrk 841, AT 2026hyy, GaiaDR3_4263591911398361472, Q0957+561_A, Mrk 817, LS I +61 302, TCrB, Gaia22efa, SN 2026fov, AT 2025acve, SN 2026fvx, AT2025sqe |
| SUTO-Otivar_ASI1600MM | T Ori |
| Salerno_Observatory_FLI | RXJ0441.0+4431, Mrk 841, AM_Her, SN 2026fvx, V1413 Aql, 8C0716_714, Mrk 817, AT2025acft, SDSS J101353.45+492758.1, Gaia24ayd, IGRJ06074+2205, TCrB |
| Seestar-S50 | SN 2026dix, SN 2026fjc, 8C0716_714, AM_Her |
| UZPW50_Chile_QHY268PRO | ASASSN-25db, RX Vol, Gaia24amo, ZTF18aarippg, SN2013bw, Gaia24ata, Gaia24dcm, TDE2026amv, TDE2025aljd, ASASSN-26bp, SN2024adxu, Mrk 841, Gaia23dkq, Gaia22alz, ngc 3783, SN2025ahsa, AT2026bti, TCrB, ASASSN-25fd, AT2026ayt, V1117 Her, Gaia21bja, TCP J14264208+0208476, AT2023aece, TDE2025bri, Nova Centauri 2025, AR Sco, SN2024afyu, AT 2024wxb, Gaia23dgt, AT 2025nlr, PRIME-2025-BLG-0406, HD 98800, Gaia19dbf, SN2026gzx |
Last week's fits uploads score (sorted by count)
| observatory-user | count |
|---|---|
| Franz-Josef Hambsch (ROAD40_QHY600M) | 3081 |
| Franz-Josef Hambsch (ROADC14_QHY600M) | 994 |
| Agata Wozniak (UZPW50_Chile_QHY268PRO) | 675 |
| Valerio Bozza (Salerno_Observatory_FLI) | 519 |
| Fraser Lewis (LCOGT-SS-2m_Muscat) | 421 |
| Fraser Lewis (LCOGT-HO-2m_Muscat) | 368 |
| Sebastian Kurowski (SOAB_ZWO-ASI2600MM) | 236 |
| Staszek Zola (OAUJ-CDK500_U47) | 225 |
| Michal Siwak (Moravian_C3-61000_PRO) | 96 |
| Waldemar Ogloza (Planetarium_Slaskie_Kepler4040) | 84 |
| Staszek Zola (PROMPT5_Apogee) | 53 |
| Franky Dubois (Adonis_G2-1600) | 50 |
| Sjoerd Dufoer (EEye_QHY268M) | 48 |
| Staszek Zola (PROMPT-MO-1_Apogee) | 42 |
| Weronika Skrobacz (Seestar-S50) | 38 |
| Franz-Josef Hambsch (AndromedaC14_QHY600M) | 30 |
| Krzysztof Rybicki (LCOGT-SAAO-1m_4K) | 26 |
| Rachel Street (LCOGT-CTIO-1m_4K) | 24 |
| Mauritz Wicker (LCOGT-CTIO-1m_4K) | 21 |
| Krzysztof Rybicki (LCOGT-CTIO-1m_4K) | 13 |
| Jacek Drazkowski (Seestar-S50) | 12 |
| Mauritz Wicker (LCOGT-SS-1m_4K) | 12 |
| Krzysztof Rybicki (LCOGT-SS-1m_4K) | 12 |
| Staszek Zola (RRRT_SBIG-STX16803) | 12 |
| Adam Popowicz (SUTO-Otivar_ASI1600MM) | 8 |
| Joysankar Majumdar (LCOGT-SS-1m_4K) | 6 |
| Yen-Hsing Lin (SHO_ASI6200MM-Pro) | 3 |
| Mauritz Wicker (LCOGT-SAAO-1m_4K) | 3 |
| Jan Kåre Trandem Qvam (HAO68_C3-26000) | 2 |
Top 5 data uploaders!
| name | count |
|---|---|
| Franz-Josef Hambsch | 4105 |
| Fraser Lewis | 789 |
| Agata Wozniak | 675 |
| Valerio Bozza | 519 |
| Staszek Zola | 332 |
Clear skies!
Your BHTOM Team
bhtom.space
Reply all
Reply to author
Forward
0 new messages