ASTROSAT CZTI

Data Quality Report

Orbit 20190523_C04_001T01_9000002948_level2

Creation date: 2025-11-30T10:13:49.076212
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/AS1C04_001T01_9000002948cztM0_level2.fits modeM0/AS1C04_001T01_9000002948cztM0_level2_quad_clean.evt
Size (bytes)847,431,3601,081,918,080
Size808.2 MB 1.0 GB
Events in quadrant A5,130,8486,913,390
Events in quadrant B5,002,2347,036,051
Events in quadrant C5,071,0646,661,404
Events in quadrant D4,296,0845,997,452

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01540
B01540
C01540
D01540

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A018280
B018280
C018280
D018280

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01906040
B01930280
C02153380
D02491080

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8987515951.774687%
B8987612531.394143%
C8987829603.293353%
D8987953305.930195%

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 107126 89888 0 0 0.00% 0.00%
B 107126 89886 0 0 0.00% 0.00%
C 107126 89890 0 0 0.00% 0.00%
D 107126 89819 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 5062 11.76 1336 1259 323.4
A 7 110 4254 9.26 1336 1259 323.4
A 0 30 3979 8.41 1336 1259 323.4
B 2 9 4122 11.11 1325 1266 257.0
B 2 8 3498 8.69 1325 1266 257.0
B 5 128 3384 8.24 1325 1266 257.0
C 1 80 3910 7.79 1338 1252 341.3
C 1 81 3894 7.74 1338 1252 341.3
C 12 241 3582 6.83 1338 1252 341.3
D 15 46 3157 6.3 1227 1119 323.3
D 3 14 3142 6.26 1227 1119 323.3
D 6 67 3055 5.99 1227 1119 323.3

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