ASTROSAT CZTI

Data Quality Report

Orbit 20180215_A04_116T01_9000001896_level2

Creation date: 2025-11-19T13:38:46.382810
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_116T01_9000001896cztM0_level2.fits modeM0/AS1A04_116T01_9000001896cztM0_level2_quad_clean.evt
Size (bytes)1,596,519,3601,830,240,000
Size1.5 GB 1.7 GB
Events in quadrant A9,962,77811,949,876
Events in quadrant B8,680,39610,229,756
Events in quadrant C9,825,55211,504,854
Events in quadrant D8,417,69010,297,028

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02770
B02770
C02770
D02770

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A034060
B034060
C034060
D034060

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03694540
B04932140
C03446960
D04285870

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A16714728051.678164%
B1671472526715.116634%
C16714713570.811860%
D16714768114.074856%

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 195043 167144 0 0 0.00% 0.00%
B 195043 161363 0 0 0.00% 0.00%
C 195043 167148 0 0 0.00% 0.00%
D 195043 167040 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 9713 11.49 2599 2451 631.8
A 7 110 8085 8.92 2599 2451 631.8
A 0 30 7442 7.9 2599 2451 631.8
B 2 9 7461 11.92 2295 2203 441.2
B 14 254 5899 8.38 2295 2203 441.2
B 5 128 5667 7.85 2295 2203 441.2
C 1 80 7281 7.36 2594 2428 659.0
C 1 81 7226 7.28 2594 2428 659.0
C 12 241 6666 6.43 2594 2428 659.0
D 6 231 6051 6.08 2403 2188 635.3
D 10 189 6011 6.02 2403 2188 635.3
D 6 38 5862 5.78 2403 2188 635.3

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