ASTROSAT CZTI

Data Quality Report

Orbit 35540

Creation date: 2022-04-25T13:06:36.465399
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/AS1A11_046T08_9000005088_35540cztM0_level2.evt modeM0/AS1A11_046T08_9000005088_35540cztM0_level2_quad_clean.evt
Size (bytes)580,357,44079,171,200
Size553.5 MB 75.5 MB
Events in quadrant A2,921,151516,307
Events in quadrant B3,278,719526,809
Events in quadrant C2,879,358536,679
Events in quadrant D8,128,001435,634

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0123153
B0136312
C0118522
D0279552

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01100
B01100
C01100
D01100

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0260
B0260
C0260
D0270

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A54532023.704383%
B54531572.879149%
C5453731.338713%
D5453155728.553090%

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 7276 5454 74 74 1.02% 1.36%
B 7276 5454 85 85 1.17% 1.56%
C 7276 5454 58 58 0.80% 1.06%
D 7276 5453 1440 1440 19.79% 26.41%

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 15 169 444040 3665.22 600 590 121.0
A 10 83 140652 1157.64 600 590 121.0
A 13 6 8708 67.1 600 590 121.0
B 5 236 693803 6078.42 602 587 114.0
B 5 172 66901 581.47 602 587 114.0
B 4 232 62894 546.33 602 587 114.0
C 0 10 284989 2113.36 590 594 134.6
C 15 214 247830 1837.23 590 594 134.6
C 9 187 25190 182.77 590 594 134.6
D 12 235 5592366 44222.83 522 507 126.4
D 8 195 175145 1381.11 522 507 126.4
D 2 250 128761 1014.29 522 507 126.4

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