ASTROSAT CZTI

Data Quality Report

Orbit 20211224_A11_037T01_9000004818_level2

Creation date: 2021-12-28T15:35:09.313457
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A11_037T01_9000004818cztM0_level2_bc.evt modeM0/AS1A11_037T01_9000004818cztM0_level2_quad_clean.evt
Size (bytes)1,422,682,560355,282,560
Size1.3 GB 338.8 MB
Events in quadrant A8,704,9162,299,787
Events in quadrant B10,024,5902,295,987
Events in quadrant C7,524,5702,319,853
Events in quadrant D15,169,4302,164,800

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0710
B0710
C0710
D0710

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0612040
B0698340
C0552450
D0836450

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05000
B05000
C05000
D05000

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A244157292.985869%
B2441517887.323367%
C244153101.269711%
D2441514025.742371%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 31579 24420 248 248 0.79% 1.02%
B 31579 24413 43 43 0.14% 0.18%
C 31579 24416 48 48 0.15% 0.20%
D 31579 24415 112 112 0.35% 0.46%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 14 4 2464599 9173.57 1210 1191 268.5
A 15 169 1162194 4323.5 1210 1191 268.5
A 15 237 284203 1053.92 1210 1191 268.5
B 5 172 3268841 13696.41 1199 1175 238.6
B 15 222 507446 2122.03 1199 1175 238.6
B 0 189 396313 1656.22 1199 1175 238.6
C 15 214 1007978 3644.47 1204 1195 276.2
C 9 187 691045 2497.2 1204 1195 276.2
C 3 233 514435 1857.88 1204 1195 276.2
D 8 195 6135807 19663.43 1177 1151 312.0
D 2 250 1122327 3593.71 1177 1151 312.0
D 12 233 1034744 3312.98 1177 1151 312.0

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter