ASTROSAT CZTI

Data Quality Report

Orbit 20161124_C02_018T01_9000000822_level2

Creation date: 2025-11-07T22:21:25.414685
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/AS1C02_018T01_9000000822cztM0_level2.fits modeM0/AS1C02_018T01_9000000822cztM0_level2_quad_clean.evt
Size (bytes)411,871,680389,741,760
Size392.8 MB 371.7 MB
Events in quadrant A2,487,8882,271,530
Events in quadrant B2,386,6242,245,127
Events in quadrant C2,475,6642,260,779
Events in quadrant D2,040,6901,944,223

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A09160
B09160
C09160
D09160

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01026410
B01071230
C0921500
D01456360

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0800
B0800
C0800
D0800

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A448816331.410396%
B4488813032.902780%
C448802400.534759%
D4487735247.852575%

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 53720 44894 0 0 0.00% 0.00%
B 53720 44892 0 0 0.00% 0.00%
C 53720 44903 0 0 0.00% 0.00%
D 53720 44802 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 14 188 2562 11.86 647 605 165.0
A 0 29 2352 10.59 647 605 165.0
A 14 204 2209 9.72 647 605 165.0
B 2 9 1992 10.82 630 597 128.9
B 14 254 1692 8.5 630 597 128.9
B 12 226 1683 8.43 630 597 128.9
C 1 81 1786 6.67 653 603 177.3
C 12 241 1783 6.66 653 603 177.3
C 1 80 1764 6.55 653 603 177.3
D 3 14 1566 6.59 581 528 157.6
D 11 82 1512 6.25 581 528 157.6
D 3 31 1512 6.25 581 528 157.6

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