ASTROSAT CZTI

Data Quality Report

Orbit 20220426_T05_026T01_9000005092_level2

Creation date: 2026-01-02T11:03:03.794838
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/AS1T05_026T01_9000005092cztM0_level2.fits modeM0/AS1T05_026T01_9000005092cztM0_level2_quad_clean.evt
Size (bytes)587,851,200616,170,240
Size560.6 MB 587.6 MB
Events in quadrant A3,434,7783,610,032
Events in quadrant B3,424,7683,676,230
Events in quadrant C3,563,7343,700,609
Events in quadrant D3,062,4963,359,602

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A012900
B012900
C012900
D012900

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02360
B02360
C02360
D02360

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01789710
B01513100
C01491450
D01566160

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6289234105.421993%
B6289224683.924187%
C6289210681.698149%
D6289215882.524963%

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 85445 62613 0 0 0.00% 0.00%
B 85445 62880 0 0 0.00% 0.00%
C 85445 62880 0 0 0.00% 0.00%
D 85445 62797 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 7 110 2843 8.95 897 844 223.2
A 9 19 2791 8.72 897 844 223.2
A 0 29 2739 8.49 897 844 223.2
B 2 9 3104 12.64 906 867 176.9
B 3 80 2660 10.13 906 867 176.9
B 2 8 2448 8.94 906 867 176.9
C 1 81 2985 8.66 944 890 242.0
C 1 80 2973 8.61 944 890 242.0
C 3 187 2390 6.2 944 890 242.0
D 7 3 2328 6.53 877 801 234.0
D 6 67 2252 6.2 877 801 234.0
D 10 189 2213 6.03 877 801 234.0

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