ASTROSAT CZTI

Data Quality Report

Orbit 20200402_A07_001T02_9000003600_level2

Creation date: 2025-12-10T10:15:59.282398
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/AS1A07_001T02_9000003600cztM0_level2.fits modeM0/AS1A07_001T02_9000003600cztM0_level2_quad_clean.evt
Size (bytes)347,152,320383,958,720
Size331.1 MB 366.2 MB
Events in quadrant A2,146,5302,403,254
Events in quadrant B2,057,5502,426,431
Events in quadrant C2,075,1222,294,907
Events in quadrant D1,816,8542,086,589

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0520
B0520
C0520
D0520

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0720940
B0730720
C0726680
D0835490

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07180
B07180
C07180
D07180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A351923731.059900%
B351925381.528757%
C351926321.795863%
D351927862.233462%

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 40402 35193 0 0 0.00% 0.00%
B 40402 35192 0 0 0.00% 0.00%
C 40402 35192 0 0 0.00% 0.00%
D 40402 35193 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 2025 10.76 558 526 139.3
A 7 110 1774 8.96 558 526 139.3
A 0 30 1642 8.01 558 526 139.3
B 2 9 1673 10.9 543 521 105.7
B 5 255 1389 8.21 543 521 105.7
B 3 17 1382 8.15 543 521 105.7
C 12 241 1476 6.93 548 515 138.6
C 9 209 1401 6.39 548 515 138.6
C 7 111 1387 6.29 548 515 138.6
D 3 14 1384 6.59 517 473 138.1
D 4 246 1362 6.44 517 473 138.1
D 6 231 1316 6.1 517 473 138.1

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