ASTROSAT CZTI

Data Quality Report

Orbit 20200814_A09_044T02_9000003814_level2

Creation date: 2025-12-14T09:26:48.353568
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_044T02_9000003814cztM0_level2.fits modeM0/AS1A09_044T02_9000003814cztM0_level2_quad_clean.evt
Size (bytes)319,944,960233,009,280
Size305.1 MB 222.2 MB
Events in quadrant A1,989,5621,294,625
Events in quadrant B1,933,6601,311,325
Events in quadrant C1,917,6981,196,606
Events in quadrant D1,654,8021,059,226

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0686630
B0684970
C0748790
D0894120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06500
B06500
C06500
D06500

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0450
B0450
C0450
D0450

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A319166331.983331%
B319165741.798471%
C3191611093.474746%
D3191617615.517609%

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 36356 31914 0 0 0.00% 0.00%
B 36356 31916 0 0 0.00% 0.00%
C 36356 31913 0 0 0.00% 0.00%
D 36356 31867 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 1676 9.22 517 485 129.2
A 7 110 1589 8.55 517 485 129.2
A 9 19 1525 8.05 517 485 129.2
B 2 9 1500 9.82 509 485 103.3
B 5 255 1304 7.92 509 485 103.3
B 5 232 1283 7.72 509 485 103.3
C 1 81 1483 7.8 505 472 129.6
C 1 80 1429 7.38 505 472 129.6
C 12 241 1347 6.75 505 472 129.6
D 3 14 1241 6.37 471 430 127.4
D 15 46 1172 5.83 471 430 127.4
D 6 67 1143 5.6 471 430 127.4

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