ASTROSAT CZTI

Data Quality Report

Orbit 20180424_A04_012T02_9000002050_level2

Creation date: 2025-11-22T00:01:54.449967
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/AS1A04_012T02_9000002050cztM0_level2.fits modeM0/AS1A04_012T02_9000002050cztM0_level2_quad_clean.evt
Size (bytes)442,143,360377,138,880
Size421.7 MB 359.7 MB
Events in quadrant A2,675,9082,131,031
Events in quadrant B2,608,1962,157,537
Events in quadrant C2,670,1062,066,556
Events in quadrant D2,217,9381,848,242

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0620
B0620
C0620
D0620

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A09480
B09480
C09480
D09480

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01027630
B0986600
C0969580
D01390700

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A468869532.032590%
B468867431.584695%
C468864100.874461%
D4688628166.006057%

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 52871 46880 0 0 0.00% 0.00%
B 52871 46880 0 0 0.00% 0.00%
C 52871 46881 0 0 0.00% 0.00%
D 52871 46867 0 0 0.00% 0.00%

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 0 29 2603 11.08 695 647 176.6
A 7 110 2247 9.06 695 647 176.6
A 9 19 1971 7.5 695 647 176.6
B 2 9 2204 11.11 685 650 139.8
B 3 17 1806 8.27 685 650 139.8
B 5 225 1758 7.92 685 650 139.8
C 1 81 1942 6.95 703 652 185.6
C 1 80 1929 6.88 703 652 185.6
C 12 241 1888 6.66 703 652 185.6
D 7 5 1640 6.24 633 575 170.7
D 6 231 1587 5.93 633 575 170.7
D 7 3 1574 5.85 633 575 170.7

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