ASTROSAT CZTI

Data Quality Report

Orbit 20171209_A04_130T01_9000001762_level2

Creation date: 2025-11-19T01:17:17.756353
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_130T01_9000001762cztM0_level2.fits modeM0/AS1A04_130T01_9000001762cztM0_level2_quad_clean.evt
Size (bytes)367,505,280271,160,640
Size350.5 MB 258.6 MB
Events in quadrant A2,234,6461,451,938
Events in quadrant B2,123,1701,395,539
Events in quadrant C2,213,4101,415,204
Events in quadrant D1,891,9821,280,908

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07920
B07920
C07920
D07920

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0903750
B0966040
C0794120
D0944860

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0770
B0770
C0770
D0770

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A388265141.323855%
B3882617244.440323%
C388261200.309071%
D388266711.728223%

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 46606 38823 0 0 0.00% 0.00%
B 46605 38799 0 0 0.00% 0.00%
C 46606 38823 0 0 0.00% 0.00%
D 46606 38821 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 2198 11.36 582 546 145.5
A 7 110 1832 8.84 582 546 145.5
A 0 30 1671 7.73 582 546 145.5
B 2 9 1799 11.15 562 537 113.2
B 14 254 1446 8.03 562 537 113.2
B 3 17 1372 7.38 562 537 113.2
C 1 80 1595 6.78 584 542 155.3
C 1 81 1585 6.72 584 542 155.3
C 3 158 1500 6.17 584 542 155.3
D 6 231 1432 6.46 539 488 146.0
D 3 14 1398 6.23 539 488 146.0
D 7 5 1370 6.04 539 488 146.0

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