ASTROSAT CZTI

Data Quality Report

Orbit 20200601_A09_022T01_9000003702_level2

Creation date: 2025-12-11T08:10:19.211610
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/AS1A09_022T01_9000003702cztM0_level2.fits modeM0/AS1A09_022T01_9000003702cztM0_level2_quad_clean.evt
Size (bytes)1,382,149,4401,249,873,920
Size1.3 GB 1.2 GB
Events in quadrant A8,596,2407,528,350
Events in quadrant B8,245,9847,615,258
Events in quadrant C8,476,4747,345,410
Events in quadrant D6,965,7085,796,470

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A028420
B028420
C028420
D028420

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02080
B02080
C02080
D02080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03487350
B03177370
C02946680
D04569810

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A13959362074.446498%
B13959534632.480748%
C13959522491.611089%
D1395921733012.414752%

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 167172 139587 0 0 0.00% 0.00%
B 167172 139573 0 0 0.00% 0.00%
C 167172 139592 0 0 0.00% 0.00%
D 167172 138284 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 0 29 8164 11.24 2241 2111 538.4
A 7 110 6727 8.57 2241 2111 538.4
A 9 19 6502 8.16 2241 2111 538.4
B 2 9 6470 10.48 2184 2093 417.5
B 2 8 5526 8.22 2184 2093 417.5
B 5 128 5458 8.06 2184 2093 417.5
C 1 81 6686 8.11 2240 2107 564.3
C 1 80 6590 7.94 2240 2107 564.3
C 12 241 5847 6.63 2240 2107 564.3
D 15 46 4911 5.86 1992 1820 527.8
D 10 189 4896 5.83 1992 1820 527.8
D 7 3 4849 5.74 1992 1820 527.8

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