ASTROSAT CZTI

Data Quality Report

Orbit 52441

Creation date: 2025-06-27T21:03:16.074600
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/AS1A13_037T01_9000006476_52441cztM0_level2.fits modeM0/AS1A13_037T01_9000006476_52441cztM0_level2_quad_clean.evt
Size (bytes)691,418,88077,656,320
Size659.4 MB 74.1 MB
Events in quadrant A2,743,018574,206
Events in quadrant B3,842,030601,989
Events in quadrant C10,174,837359,214
Events in quadrant D8,357,382385,969

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0129311
B0157451
C0344992
D0291171

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6153871.413944%
B61542564.159896%
C6153246540.061758%
D6153165126.832439%

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 7048 6154 13 13 0.18% 0.21%
B 7049 6155 85 85 1.21% 1.38%
C 7048 6153 2201 2201 31.23% 35.77%
D 7048 6153 1591 1591 22.57% 25.86%

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 5 240 77300 474.96 649 631 161.4
A 3 14 31271 189.81 649 631 161.4
A 15 174 24141 145.64 649 631 161.4
B 10 254 451045 3300.65 633 611 136.5
B 0 171 338118 2473.15 633 611 136.5
B 4 171 116383 848.34 633 611 136.5
C 15 224 6032217 42529.23 510 505 141.8
C 15 231 543825 3830.92 510 505 141.8
C 12 254 493955 3479.29 510 505 141.8
D 12 17 1970429 13228.16 524 501 148.9
D 15 93 1578698 10597.66 524 501 148.9
D 12 2 1288300 8647.63 524 501 148.9

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