ASTROSAT CZTI

Data Quality Report

Orbit 20220225_T04_078T01_9000004962_level2

Creation date: 2026-01-01T09:43:14.572644
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/AS1T04_078T01_9000004962cztM0_level2.fits modeM0/AS1T04_078T01_9000004962cztM0_level2_quad_clean.evt
Size (bytes)395,775,360259,444,800
Size377.4 MB 247.4 MB
Events in quadrant A2,494,8041,341,022
Events in quadrant B2,290,7061,279,666
Events in quadrant C2,404,1121,304,206
Events in quadrant D2,023,1401,157,905

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0913350
B01134010
C0898160
D01507860

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01680
B01680
C01680
D01680

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08260
B08260
C08260
D08260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A403674221.045408%
B4036729217.236109%
C403672370.587113%
D4036722355.536701%

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 57165 40357 0 0 0.00% 0.00%
B 57165 40352 0 0 0.00% 0.00%
C 57165 40365 0 0 0.00% 0.00%
D 57165 40363 0 0 0.00% 0.00%

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 7 110 2069 9.24 652 615 157.4
A 0 29 1972 8.62 652 615 157.4
A 9 19 1956 8.52 652 615 157.4
B 2 9 2088 12.28 609 582 122.6
B 3 80 1837 10.23 609 582 122.6
B 2 8 1612 8.4 609 582 122.6
C 1 81 1969 8.43 636 600 162.4
C 1 80 1939 8.24 636 600 162.4
C 3 202 1911 8.07 636 600 162.4
D 7 3 1483 6.27 579 531 151.8
D 6 231 1460 6.12 579 531 151.8
D 6 67 1449 6.05 579 531 151.8

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