× Sector 2 was reprocessed in May 2021, updating the background correction, manual exclude flags, timestamps, and input catalog. For more deatil please see the Reprocessing Information table below.

Sector 2 Information

For full data release notes see: DRN2, DRN42 (reprocessing). For a list of TIC IDs with noted issues, see this list

Sector Summary

Sector dates: August 23 to September 20 2018

Pointing: Southern hemisphere

Days of Science Data Collection: 27.4

Days of Paused Data Collection: 1.44

Sector-2

Spacecraft Pointing (deg)

	RA	dec	roll
Spacecraft	16.56	-54.02	220.43
Camera 1	352.08	-23.06	294.47
Camera 2	5.7	-44.31	302.18
Camera 3	33.36	-62.19	144.76
Camera 4	90.0	-66.57	196.63

Orbit Summary

Pointing	Spacecraft RA, dec	Spacecraft roll (deg)
Southern hemisphere	16.56, -54.02	220.43

Sector Notes

Orbits	Dates (UTC) Start - End	Cadence # Start - End	Momentum dumps
11	2018-08-23 - 2018-09-05	91186 - 100583	Every 2.5 days
12	2018-09-07 - 2018-09-20	101620 - 110922	Every 2.5 days

Noted Issue	Description
Scattered light	In Sector 2, the main stray light features to be aware of are: The upturns at the end of each orbit are caused by the Earth rising above the sunshade, which reaches a minimum of ∼50 degrees from the center of Camera 1. The Earth’s daily rotation is evident in the background level. The lower level rise in the first orbit of Camera 1 (days 4–9) is caused by the Moon moving within 30 degrees of the camera boresight.

Reprocessing Information: DRN42

During TESS’s primary mission several updates were made to various instrument models, algorithms, and pipeline parameters. Below we list what was updated and applied when reprocessing sectors 1-13. Please see DRN42 for a more comprehensive explanation of each update.

Update	Description
Instrument models updated:	Electronics model Reference Flux, PRF, and Linearity
Calibration Pipeline Module updates:	The 1D bias estimate is now split into two components, a time-dependent scalar correction and a static row-dependent correction. The first two overclock rows were also removed. The propagation of the uncertainty from the 2D bias model was changed. It is a static term and no longer applied to pixel data.
Pre-Search Data Conditioning Pipeline Module updates:	The parameters to calibrate the PDC goodness metrics were finalized.
Transiting Planet Search Pipeline Module updates:	An initial run of TPS is now used to identify problematic epochs that are assigned “deemphasis weights” in a second and final run of TPS.
Compute Optimal Aperture Pipeline Module updates:	The photometric apertures for stars with Tmag less than 11 were slightly increased.
Photometric Analysis Pipeline Module updates:	The sky background estimate was modified. A scalar offset is now applied that forces the dimmest background-corrected pixels to values near zero, if those pixels were significantly negative.
TESS Input Catalog update:	Targets were reprocessed with version 8 of the TIC. The change affected the apertures assigned to individual targets and the calculations for crowding (CROWDSAP) and flux fraction (FLUXFRAC), and as such the physical properties of TCEs derived from stellar parameters.
Timestamps update:	Timestamps were updated to account for previous drift errors and electronic effects. All data from Sectors 1–36 are now registered to a consistent time system.
New data flags:	All flags are now consistent with those described in DRN30.
Threshold Crossing Event issues:	The planet search of the reprocessed light curves produced a different set of TCEs from the original processed data. There is a high degree of overlap, but not every TCE from previous data releases was recovered. To differentiate between the initial release and this reprocessed data a "pipeline instance number" is included in the filenames of the dv-timeseries, dv-reports, ad dv-result xml files. Larger pin numbers indicate later versions of the software were used to produce the data products. The DR number is also included as a keyword in the export product headers (DATA_REL).