ASTROSAT CZTI

Data Quality Report

Orbit 35166

Creation date: 2022-03-31T05:31:20.829921
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/AS1C07_004T01_9000005042_35166cztM0_level2.evt modeM0/AS1C07_004T01_9000005042_35166cztM0_level2_quad_clean.evt
Size (bytes)725,420,16072,351,360
Size691.8 MB 69.0 MB
Events in quadrant A2,968,409476,104
Events in quadrant B7,343,949409,785
Events in quadrant C3,344,072474,442
Events in quadrant D7,900,502402,680

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0270
B0270
C0270
D0270

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0127563
B0259962
C0135402
D0278322

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01240
B01240
C01240
D01240

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6112110.179974%
B6112170627.912304%
C6112661.079843%
D6112106617.441099%

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 8828 6114 2 2 0.02% 0.03%
B 8828 6114 1086 1086 12.30% 17.76%
C 8828 6114 53 53 0.60% 0.87%
D 8828 6114 977 977 11.07% 15.98%

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 10 83 99575 679.58 716 702 145.5
A 9 143 62048 421.65 716 702 145.5
A 13 6 18952 125.44 716 702 145.5
B 5 236 3597991 29661.47 626 609 121.3
B 5 172 427433 3519.29 626 609 121.3
B 5 200 352299 2899.79 626 609 121.3
C 15 214 253493 1557.02 692 696 162.4
C 0 207 225069 1381.96 692 696 162.4
C 0 10 140341 860.1 692 696 162.4
D 8 195 2786886 17320.08 654 636 160.9
D 5 223 719205 4466.82 654 636 160.9
D 7 80 495736 3077.68 654 636 160.9

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