ASTROSAT CZTI

Data Quality Report

Orbit 06835

Creation date: 2024-06-27T15:12:11.773519
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/AS1A02_174T04_9000000938_06835cztM0_level2.evt modeM0/AS1A02_174T04_9000000938_06835cztM0_level2_quad_clean.evt
Size (bytes)642,326,40091,546,560
Size612.6 MB 87.3 MB
Events in quadrant A3,643,686569,491
Events in quadrant B3,832,243577,202
Events in quadrant C6,167,522549,451
Events in quadrant D5,287,903540,416

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0130

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0161904
B0167163
C0235383
D0213793

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01560
B01560
C01560
D01560

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A77061021.323644%
B77061622.102258%
C77064906.358682%
D77064936.397612%

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 8906 7710 3 3 0.03% 0.04%
B 8906 7710 9 9 0.10% 0.12%
C 8906 7710 441 441 4.95% 5.72%
D 8906 7709 240 240 2.69% 3.11%

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 8 15 64936 339.24 924 902 188.8
A 13 248 18623 93.88 924 902 188.8
A 0 226 9086 43.36 924 902 188.8
B 0 219 65933 364.62 931 909 178.3
B 4 48 40157 220.08 931 909 178.3
B 4 81 25696 138.99 931 909 178.3
C 9 68 2240276 10777.19 890 891 207.8
C 9 247 260113 1247.52 890 891 207.8
C 12 16 176375 844.53 890 891 207.8
D 2 33 777232 3640.4 862 834 213.3
D 8 195 630935 2954.44 862 834 213.3
D 2 216 267452 1250.13 862 834 213.3

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