2023ApJ...956...36L

Query : 2023ApJ...956...36L

2023ApJ...956...36L - Astrophys. J., 956, 36 (2023/October-2)

The Atacama Cosmology Telescope: Systematic Transient Search of 3 Day Maps.

LI Y., BIERMANN E., NAESS S., AIOLA S., AN R., BATTAGLIA N., BHANDARKAR T., CALABRESE E., CHOI S.K., CROWLEY K.T., DEVLIN M., DUELL C.J., DUFF S.M., DUNKLEY J., DUNNER R., GALLARDO P.A., GUAN Y., HERVIAS-CAIMAPO C., HINCKS A.D., HUBMAYR J., HUFFENBERGER K.M., HUGHES J.P., KOSOWSKY A., LOUIS T., MALLABY-KAY M., McMAHON J., NATI F., NIEMACK M.D., ORLOWSKI-SCHERER J., PAGE L., SALATINO M., SIFON C., STAGGS S.T., VARGAS C., VAVAGIAKIS E.M., WANG Y. and WOLLACK E.J.

Abstract (from CDS):

We conduct a systematic search for transients in 3 yr of data (2017-2019) from the Atacama Cosmology Telescope (ACT). ACT covers 40% of the sky at three bands spanning from 77-277 GHz. Analysis of 3 day mean-subtracted sky maps, which were match filtered for point sources, yielded 29 transient detections. Eight of these transients are due to known asteroids, and three others were previously published. Four of these events occur in areas with poor noise models and thus we cannot be confident they are real transients. We are left with 14 new transient events occurring at 11 unique locations. All of these events are associated with either rotationally variable stars or cool stars. Ten events have flat or falling spectra indicating radiation from synchrotron emission. One event has a rising spectrum indicating a different engine for the flare.

Abstract Copyright: © 2023. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Transient sources - Stellar flares - Cosmic microwave background radiation - Asteroids

Status at CDS : All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 24

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Number of rows : 24
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 HD 22468 RS* 03 36 47.2904292073 +00 35 15.943692002 7.09 6.79 5.90     K2:Vnk 1206 0
2 GRB 190114C gB 03 38 01.18 -26 56 47.8           ~ 343 0
3 2MASS J04035857+1400572 * 04 03 58.5833412540 +14 00 57.258882007           ~ 2 0
4 V* CP Ori EB* 06 07 01.8593570904 +17 41 58.194372804   11.35 10.61 10.46 9.812 G0 32 0
5 V* TY Pic RS* 06 07 56.9362488696 -54 26 21.341280768   8.69 7.70   6.686 G8/K0III+F 47 0
6 HD 52385 * 07 00 37.6127454240 -11 14 45.091745916   9.45 8.41     K0/1III 7 0
7 ACT-T J070038-111436 ev 07 00 38.0 -11 14 36           ~ 3 0
8 G 9-38 ** 08 58 15.061776 +19 45 46.96020   15.58   13.40   M7V+M7V 113 0
9 SN 2003dh SN* 10 44 50.030 +21 31 18.15     16.2     SNIcpec 1261 1
10 ZTF J125045.11+113337.4 RS* 12 50 45.1363725773 +11 33 37.104661700   14.088 12.966 12.551   ~ 8 0
11 IGR J12580+0134 gam 12 58 05.1 +01 34 26           ~ 50 0
12 Gaia DR3 3936693910286240000 * 13 07 04.4415660405 +16 36 08.649043009           ~ 1 0
13 StKM 1-1155 LM* 14 25 55.9329900624 +14 12 10.113682644   12.13 11.05 10.62   M0.0Ve 30 0
14 SN 2018cow SN* 16 16 00.254 +22 16 05.10           SNIb 305 0
15 HD 347929 Ro* 18 07 24.1177687944 +19 42 22.910505948   10.18 9.099 8.55 7.664 K0 19 1
16 ACT-T J181515-492746 ev 18 15 15.3 -49 27 46           ~ 2 0
17 2MASS J18151564-4927472 PM* 18 15 15.6448794120 -49 27 47.301999804   14.396 12.838     M3 23 0
18 ** SKF 1810A Or* 19 02 22.8175995503 -05 36 15.077211542           ~ 7 0
19 HD 182928 Ro* 19 28 32.0144837544 -35 07 58.851926832   10.48 9.708   8.636 G8IIIe 20 0
20 ACT-T J200758+160954 ev 20 07 58.8 +16 09 55           ~ 2 0
21 HD 191179 SB* 20 07 59.2228999608 +16 09 58.128238548   9.18 8.371   7.397 G5 27 0
22 Gaia DR3 6885400713762009216 * 21 04 23.4087794725 -13 40 21.167503076           ~ 1 0
23 V* TX PsA PM* 22 45 00.0641595504 -33 15 26.091533124   14.93 13.36 12.095 10.379 M5IVe 85 0
24 V* IM Peg RS* 22 53 02.2663977960 +16 50 28.300547040   7.024 5.890     K2III 357 1

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