BHTOM Targets for 15 September, 2025

8 views

Skip to first unread message

wyrz...@gmail.com

unread,

Sep 15, 2025, 6:38:58 AMSep 15

to bhtomt...@googlegroups.com

Hello,

Greetings from the BHTOM Automated Newsletter!

As of 2025-09-15 10:38:42.018796+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
AT2025wyg	262.551250	-27.896889	12.1	91.0	Unknown	Nova found by Tadashi Kojima
AT2025xes	66.887308	-42.165719	14.3	104.0	Unknown	Candidate nuclear transient from ATLAS via TNS
AT2025xop	295.930617	-18.696344	100.0	122.0	Unknown	Candidate supernova from LAST via TNS
AT2025xeg	119.111725	-78.699383	100.0	86.0	Unknown	Candidate supernova from ATLAS and GOTO 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.

North (dec>0):

name	ra	dec	mag_last	sun_separation	classification	description
LS I +61 302	40.131935	61.229332	9.6	104.0	Unknown	Be-star with unknown compact companion
V1413 Aql	285.945155	16.438048	9.7	113.0	Symbiotic star	known symbiotic star for regular monitoring
4U2206+54	331.984320	54.518447	10.0	119.0	XRB	Be X-ray binary
EECep	332.344808	55.756738	10.3	118.0	Variable star-other	Long period eclipsing binary with accretion disk, eclipse predicted for October
2S0114+65	19.511240	65.291619	10.9	107.0	XRB	Supergiant X-ray binary
RXJ0441.0+4431	70.247207	44.530349	10.9	94.0	XRB	Be X-ray binary
IGRJ06074+2205	91.860884	22.096600	12.0	78.0	XRB	Be X-ray binary
RXJ0146.9+6121	26.750885	61.356573	12.6	109.0	XRB	Be X-ray binary
AM_Her	274.055228	49.867989	12.7	96.0	CV	Target for joint optical-radio observations
8C0716_714	110.472701	71.343434	13.5	77.0	QSO	high cadence variability suspected
Gaia22efa	67.656210	35.842100	13.7	98.0	YSO	Brightening in candidate YSO. After initial accretion burst the brightness started to rise slowly.
BL_Lac	330.680381	42.277772	13.8	130.0	BL Lac	famous variable blazar
GROJ2058+42	314.698071	41.776995	14.2	124.0	XRB	Be X-ray binary
Gaia24ala	86.808830	0.152040	14.3	83.0	YSO	Dimming in candidate YSO
4U0115+63	19.633210	63.742520	14.4	109.0	XRB	Be X-ray binary
KS1947+300	297.397850	30.208827	14.4	119.0	XRB	Be X-ray binary
Gaia21fji	315.992250	50.244500	14.6	118.0	YSO	Optical monitoring of Gaia- and ZTF-alerted candidate eruptive YSOs
IGRJ21343+4738	323.584883	47.633391	14.6	123.0	XRB	Be X-ray binary
SAXJ2103.5+4545	315.898792	45.751547	15.4	121.0	XRB	Be X-ray binary
ZTF18abdciiz	281.649375	0.922556	15.7	111.0	Unknown	YSO candidate
Gaia24dfc	52.509900	61.429790	16.2	99.0	Unknown	Brightening in candidate YSO
Gaia22cav	344.036730	58.517780	16.7	117.0	YSO	3 mag outburst in candidate EXOR, waiting for the next outbursts
SN2024afyu	258.429383	7.625256	16.9	88.0	SN	Interesting long-term Supernova
Gaia24aup	313.096720	57.055180	17.2	112.0	Unknown	candidate microlensing event
SDSS J013136.44+130331.0	22.901854	13.058618	17.4	143.0	QSO	Candidate for lensed QSO
Gaia4323024741104637568	292.501025	17.933682	17.5	119.0	Unknown	Possibly eruptive YSO which is approaching to the quiescence
Gaia24bux	347.418150	62.482960	17.8	113.0	YSO	Brightening in Gaia and Wise source, possibly new young eruptive star

South (dec<0):

name	ra	dec	mag_last	sun_separation	classification	description
T Ori	83.960201	-5.476368	11.3	87.0	YSO	Herbig AeBe star, YSO
V1787 Ori	84.538767	-6.821276	12.9	86.0	YSO	Herbig Ae/Be Star
Mkn590	33.639835	-0.766717	13.8	136.0	QSO	Flaring quasar
TT Ori	83.819730	-4.762387	14.1	87.0	YSO	eruptive variable, Orion type
IRAS 23226-3843	351.350833	-38.446978	14.3	146.0	AGN	changinglook AGN
V416Ori	83.838583	-5.703439	14.6	87.0	YSO	variable YSO
ZTF18acruktt	88.904388	-12.398039	14.7	82.0	YSO	YSO candidate
PKS0454-234	74.263250	-23.414450	14.9	97.0	QSO	long time monitoring for ROTUZ team
SN2025pht	70.370254	-2.865447	14.9	100.0	SN	SN IIP, ASASSN-25cw
ASASSN-25cd	277.969917	-28.807539	15.2	108.0	Unknown	A Deep, Ongoing, Dipping Event
Gaia23bsf	276.583080	-14.036970	15.3	107.0	Unknown	Star getting brighter very slowly
1RXS_J173546.9-302859	263.946400	-30.482900	15.8	95.0	Unknown	Possible X-ray transient from SVOM
HE0413_4031	63.810269	-40.394754	15.9	105.0	QSO	Long term variable quasar for monitoring
GaiaDR3_4078221191620409216	281.641570	-23.578681	16.0	111.0	Microlensing Event	microlensing candidate ZTF25abcwzci, KATS25Q005
Gaia24amo	249.148921	-53.749919	16.1	87.0	Microlensing Event	candidate microlensing event, with the second peak
mrk1018	31.566619	-0.291455	16.4	138.0	AGN	changinglook AGN
PMNJ0730-6602	112.706495	-66.038578	16.5	81.0	AGN	IAUZ Target
HE0435-4312	69.299139	-43.101189	16.8	101.0	QSO	Long term variable quasar for monitoring
Gaia24csq	286.710270	-26.939590	16.8	115.0	Unknown	potential slowly rising microlensing event
4FGL J1603.8-4903	240.966507	-49.061699	17.5	81.0	Unknown	Astro-COLIBRI target
Gaia23cnm	285.322920	-18.717130	17.7	115.0	Unknown	slow and long rise, possible microlensing or YSO
ZTF20abendxc	281.224708	-8.538111	17.8	111.0	YSO	Possibly eruptive YSO

Last week's total of images processed: 2066 (1722 with success).

Last week's targets observed:

camera	target_names
ASV0.4_SBIG6303	TCrB
ASV1.4_Andor	Gaia24azc, Gaia24acn, ZTF18aarippg, TCrB, Gaia23crp, Gaia24aup, Gaia22dwj, AT2021aeuk
ASV60_FLI	ZTF18aarippg, TCrB, AT2024kwu
AZT-8_C4-16000	Gaia24amv, Gaia19cuu, Gaia17cuh, Gaia18awg, Gaia18acq, Gaia23bcv, Gaia18dom, Gaia19btn, AT2025mau, Gaia18bad
Adonis_G2-1600	EECep, AM_Her, Gaia24azc, TCrB, Gaia24azi, TabbysStar, LS I +61 302, Gaia24ayd, Gaia24dfv
EEye_QHY268M	Gaia24csq, AT2024kwu, Gaia23cnm, Gaia24aup, AT2025mau
LCOGT-CTIO-1m_4K	3I_ATLAS-lsc-1m0a-2025-09-07-60925.9765024, 3I_ATLAS-lsc-1m0a-2025-09-08-60926.9901875
LCOGT-CTIO-40cm_QHY600M	3I_ATLAS-lsc-0m4a-2025-09-05-60923.9755972, 3I_ATLAS-lsc-0m4a-2025-09-05-60923.0090624, 3I_ATLAS-lsc-0m4a-2025-09-06-60924.979912
LCOGT-SAAO-1m_4K	3I_ATLAS-cpt-1m0a-2025-09-05-60923.7718411, 3I_ATLAS-cpt-1m0a-2025-09-06-60924.7215405, 3I_ATLAS-cpt-1m0a-2025-09-08-60926.7224236
LW_Seestar-S50	BL_Lac
MSU-Observatory_QHY600PH	TabbysStar, 2S0114+65
OAUJ-CDK500_U47	Gaia23dqt, Gaia24bux, EECep, AT2025mau
PROMPT6_FLI	ASASSN-24fw
Planetarium_Slaskie_Kepler4040	Gaia18awg
ROAD_QHY600M	Gaia23dnm, Gaia24dhn, Gaia24ccy
SOAB_ZWO-ASI2600MM	Gaia21fji, AM_Her, LS I +61 302, AT2024kwu
TJO_MEIA3	Gaia24dfc, Gaia24bux, EECep, SN2025bof, TCrB, AT2024kwu, AT2025oas, SN2025rbs, Gaia23dqt, LS I +61 302, Gaia24aup, Gaia24ayd, Gaia23cpd, Gaia24dkk
ZAO_G2-1600	TCrB, Gaia21fji, SN2025fvw

Last week's fits uploads score (sorted by count)

observatory-user	count
Franz-Josef Hambsch (ROAD_QHY600M)	604
Josep Manel Carrasco (TJO_MEIA3)	590
Charles Galdies (ZAO_G2-1600)	212
Milan Stojanović (ASV60_FLI)	144
Milan Stojanović (ASV1.4_Andor)	136
Peter Craig (MSU-Observatory_QHY600PH)	115
Milan Stojanović (ASV0.4_SBIG6303)	52
Dariia Rusanova (AZT-8_C4-16000)	46
Yauheni Stsefanenka (OAUJ-CDK500_U47)	26
Franky Dubois (Adonis_G2-1600)	24
Waldemar Ogloza (Planetarium_Slaskie_Kepler4040)	20
Sebastian Kurowski (SOAB_ZWO-ASI2600MM)	19
Fraser Gillan (LCOGT-CTIO-40cm_QHY600M)	15
Fraser Gillan (LCOGT-SAAO-1m_4K)	15
Sjoerd Dufoer (EEye_QHY268M)	14
Jacek Drazkowski (LW_Seestar-S50)	12
Fraser Gillan (LCOGT-CTIO-1m_4K)	10
Staszek Zola (PROMPT6_FLI)	8
Alicja Pucek (OAUJ-CDK500_U47)	4

Top 5 data uploaders!

name	count
Franz-Josef Hambsch	604
Josep Manel Carrasco	590
Milan Stojanović	332
Charles Galdies	212
Peter Craig	115