ASTROSAT CZTI

Data Quality Report

Orbit 50497

Creation date: 2025-01-28T18:08:32.111297
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/AS1T05_239T01_9000006444_50497cztM0_level2.fits modeM0/AS1T05_239T01_9000006444_50497cztM0_level2_quad_clean.evt
Size (bytes)853,914,24090,290,880
Size814.4 MB 86.1 MB
Events in quadrant A5,510,439628,967
Events in quadrant B6,018,451682,304
Events in quadrant C9,647,339454,583
Events in quadrant D9,878,390468,098

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0212740
B0228100
C0337330
D0343820

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A71815998.341457%
B71826529.078251%
C7182225031.328321%
D7182179825.034809%

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 7181 7181 451 451 6.28% 6.28%
B 7182 7182 542 542 7.55% 7.55%
C 7181 7181 1708 1708 23.78% 23.78%
D 7182 7182 1732 1732 24.12% 24.12%

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 10 253 1309076 7099.59 747 728 184.3
A 3 130 406314 2200.86 747 728 184.3
A 4 3 161027 869.84 747 728 184.3
B 7 0 1623117 10089.41 745 718 160.8
B 4 206 719825 4472.0 745 718 160.8
B 4 170 456907 2836.96 745 718 160.8
C 15 214 1767844 10409.3 614 611 169.8
C 0 208 894343 5264.23 614 611 169.8
C 15 196 783319 4610.28 614 611 169.8
D 7 61 3009546 16498.62 655 631 182.4
D 6 42 1793926 9833.08 655 631 182.4
D 11 161 583578 3196.44 655 631 182.4

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