ASTROSAT CZTI

Data Quality Report

Orbit 20171130_A04_231T01_9000001740_level2

Creation date: 2025-11-18T20:45:57.352277
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/AS1A04_231T01_9000001740cztM0_level2.fits modeM0/AS1A04_231T01_9000001740cztM0_level2_quad_clean.evt
Size (bytes)510,560,640451,753,920
Size486.9 MB 430.8 MB
Events in quadrant A3,096,8482,740,898
Events in quadrant B2,856,1402,368,251
Events in quadrant C3,186,0802,683,245
Events in quadrant D2,506,0902,078,010

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A011300
B011300
C011300
D011300

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0890
B0890
C0890
D0890

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01369780
B02045460
C01140740
D01937030

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5550618323.300544%
B55506897116.162217%
C555066161.109790%
D55506828114.919108%

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 64641 55503 0 0 0.00% 0.00%
B 64641 55455 0 0 0.00% 0.00%
C 64641 55507 0 0 0.00% 0.00%
D 64641 55390 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 3041 11.22 807 754 203.9
A 7 110 2503 8.58 807 754 203.9
A 0 30 2381 7.98 807 754 203.9
B 2 9 2455 11.6 756 722 149.4
B 3 17 1924 8.05 756 722 149.4
B 5 128 1901 7.89 756 722 149.4
C 1 80 2432 7.59 841 786 216.9
C 1 81 2341 7.17 841 786 216.9
C 12 241 2272 6.85 841 786 216.9
D 6 231 1873 6.41 715 652 190.4
D 3 14 1856 6.32 715 652 190.4
D 10 189 1821 6.14 715 652 190.4

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