Survey of COmpact sources for Pulsars and Exotic objects (SCOPE)

A targeted all-sky pulsar survey, Survey of COmpact sources for Pulsars and Exotic objects (SCOPE), is currently being conducted using the upgraded Giant Metrewave Radio Telescope (GMRT) and the Green Bank Telescope (GBT). Some of the targets in this survey are listed below.

All the compact sources which are visible at 147.5 MHz in the TIFR GMRT Sky Survey (TGSS) but not at the higher radio frequencies, such as in the rapid ASKAP continuum survey (RACS) or in the NRAO VLA Sky Survey (NVSS), and have spectral indices steeper than -1.8. In the GMRT SCOPE (GM-SCOPE) survey, each target is observed twice, at two different epochs, and at band-3 (300-500 MHz) as well as band-4 (550-750 MHz). In the GBT SCOPE (GB-SCOPE) survey, a similar subset of sources is observed using the 820 MHz band.
All the compact objects as pulsar candidates in the Galactic Bulge revealed by Frail et al. (2024). In the GM-SCOPE survey, each target is observed at band-4 (550-750 MHz) as well as band-5 (1260-1460 MHz). In the GB-SCOPE survey, these sources are observed at the C-band.

SCOPE Discoveries:

PSR	Period (ms)	DM (pc/cc)	Binary	Flux density(mJy) @650 MHz	Discovery Date	Remarks
J1840+1102	1.60	98.8	Yes	1.2	2023-05-09	GM-SCOPE
J1827-0849	2.24	198	Yes	--	2024-06-07	GB-SCOPE (Radio counterpart of gamma-ray pulsar J1827-0849)
J1728-2608	23.6	138	TBC	--	2024-11-19	GM-SCOPE
J1740-2805	7.51	329.7	Yes	--	2024-12-10	GB-SCOPE
J1800-2735	92.16	295.6	TBC	--	2025-01-10	GM-SCOPE
J1824-3238	2.57	90.0	TBC	--	2025-01-17	GM-SCOPE
J1816-3234	4.33	90.8	TBC	--	2025-02-12	GM-SCOPE
J1837-3350	388.8	38	--	--	2025-02-22	GM-SCOPE