ASTROSAT CZTI

Data Quality Report

Orbit 20220422_A11_097T07_9000005084_level2

Creation date: 2026-01-02T10:53:19.694906
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_097T07_9000005084cztM0_level2.fits modeM0/AS1A11_097T07_9000005084cztM0_level2_quad_clean.evt
Size (bytes)536,244,480478,676,160
Size511.4 MB 456.5 MB
Events in quadrant A3,284,3142,800,759
Events in quadrant B3,146,8602,776,246
Events in quadrant C3,183,3642,650,212
Events in quadrant D2,761,5622,404,399

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A011500
B011500
C011500
D011500

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01171190
B01275270
C01368010
D01313600

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02230
B02230
C02230
D02230

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A563242600.461615%
B563248441.498473%
C5632412862.283219%
D5632411251.997372%

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 82340 56325 0 0 0.00% 0.00%
B 82340 56314 0 0 0.00% 0.00%
C 82340 56296 0 0 0.00% 0.00%
D 82340 56317 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 2735 9.01 857 803 214.4
A 7 110 2660 8.66 857 803 214.4
A 9 19 2592 8.34 857 803 214.4
B 2 9 2700 11.51 832 794 165.6
B 3 80 2370 9.52 832 794 165.6
B 2 8 2265 8.88 832 794 165.6
C 1 81 2600 8.36 840 786 217.0
C 1 80 2560 8.18 840 786 217.0
C 3 202 2527 8.02 840 786 217.0
D 10 189 2058 6.31 791 724 211.6
D 7 3 2058 6.31 791 724 211.6
D 4 160 2037 6.21 791 724 211.6

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