ASTROSAT CZTI

Data Quality Report

Orbit 20180222_T02_002T01_9000001914_level2

Creation date: 2025-11-19T17:22:59.277162
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/AS1T02_002T01_9000001914cztM0_level2.fits modeM0/AS1T02_002T01_9000001914cztM0_level2_quad_clean.evt
Size (bytes)561,242,880757,846,080
Size535.2 MB 722.7 MB
Events in quadrant A3,465,4665,091,379
Events in quadrant B2,936,7244,209,515
Events in quadrant C3,432,6404,942,888
Events in quadrant D2,933,9884,487,589

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01130
B01130
C01130
D01130

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01343150
B01950220
C01260400
D01520210

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A012520
B012520
C012520
D012520

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A615709161.487738%
B615701148418.651941%
C615702970.482378%
D6157023893.880136%

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 72716 61518 0 0 0.00% 0.00%
B 72713 59513 0 0 0.00% 0.00%
C 72716 61573 0 0 0.00% 0.00%
D 72716 61486 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 3305 10.96 903 852 223.7
A 7 110 2751 8.49 903 852 223.7
A 9 19 2633 7.96 903 852 223.7
B 2 9 2542 11.89 774 741 151.4
B 14 254 2021 8.45 774 741 151.4
B 3 17 1973 8.14 774 741 151.4
C 12 241 2422 6.66 907 848 236.4
C 9 188 2327 6.26 907 848 236.4
C 2 191 2286 6.08 907 848 236.4
D 3 14 2165 6.25 836 761 224.7
D 6 231 2146 6.16 836 761 224.7
D 7 3 2063 5.79 836 761 224.7

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