ASTROSAT CZTI

Data Quality Report

Orbit 20211125_T04_071T01_9000004782_level2

Creation date: 2025-12-30T13:18:48.424432
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/AS1T04_071T01_9000004782cztM0_level2.fits modeM0/AS1T04_071T01_9000004782cztM0_level2_quad_clean.evt
Size (bytes)780,022,080690,255,360
Size743.9 MB 658.3 MB
Events in quadrant A4,955,3944,251,095
Events in quadrant B4,446,0983,630,016
Events in quadrant C4,583,1263,855,414
Events in quadrant D4,056,2083,589,815

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01847260
B02466170
C02476930
D02683510

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A016620
B016620
C016620
D016620

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02850
B02850
C02850
D02850

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8131814401.770826%
B81318990512.180575%
C8131843375.333383%
D8131829713.653558%

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 109939 81317 0 0 0.00% 0.00%
B 109939 81134 0 0 0.00% 0.00%
C 109939 81300 0 0 0.00% 0.00%
D 109939 81286 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 4028 9.02 1291 1214 312.0
A 9 19 3912 8.65 1291 1214 312.0
A 7 110 3905 8.62 1291 1214 312.0
B 2 9 3690 10.92 1180 1129 234.4
B 3 80 3419 9.77 1180 1129 234.4
B 2 8 3082 8.33 1180 1129 234.4
C 1 81 3825 8.64 1213 1139 310.8
C 1 80 3753 8.41 1213 1139 310.8
C 3 187 3143 6.45 1213 1139 310.8
D 7 3 3051 6.38 1161 1059 312.0
D 3 14 2943 6.04 1161 1059 312.0
D 6 67 2916 5.95 1161 1059 312.0

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