ASTROSAT CZTI

Data Quality Report

Orbit 20200202_A07_112T02_9000003480_level2

Creation date: 2025-12-09T03:59:35.035636
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_112T02_9000003480cztM0_level2.fits modeM0/AS1A07_112T02_9000003480cztM0_level2_quad_clean.evt
Size (bytes)387,541,440405,884,160
Size369.6 MB 387.1 MB
Events in quadrant A2,391,8602,478,804
Events in quadrant B2,267,1182,498,782
Events in quadrant C2,309,8622,379,931
Events in quadrant D2,016,4962,184,251

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0850
B0870
C0860
D0880

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08180
B08200
C08160
D08180

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0820450
B0851380
C0846760
D0941300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A400821990.496482%
B400624251.060856%
C400535271.315757%
D400419402.347594%

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 48140 40395 0 0 0.00% 0.00%
B 48140 40369 0 0 0.00% 0.00%
C 48140 40366 0 0 0.00% 0.00%
D 48140 40340 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 2276 10.92 622 583 155.1
A 7 110 1844 8.13 622 583 155.1
A 9 19 1789 7.78 622 583 155.1
B 2 9 1844 10.61 601 575 119.6
B 2 8 1536 8.03 601 575 119.6
B 3 17 1512 7.83 601 575 119.6
C 1 81 1799 7.89 608 569 155.8
C 1 80 1772 7.72 608 569 155.8
C 12 241 1637 6.85 608 569 155.8
D 3 14 1595 6.81 576 525 157.1
D 3 31 1411 5.64 576 525 157.1
D 15 46 1400 5.57 576 525 157.1

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