ASTROSAT CZTI

Data Quality Report

Orbit 20161010_A02_028T01_9000000724_level2

Creation date: 2025-11-06T23:23:03.956349
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/AS1A02_028T01_9000000724cztM0_level2.fits modeM0/AS1A02_028T01_9000000724cztM0_level2_quad_clean.evt
Size (bytes)369,241,920371,456,640
Size352.1 MB 354.2 MB
Events in quadrant A2,274,6262,263,693
Events in quadrant B2,174,3882,267,439
Events in quadrant C2,219,2002,161,893
Events in quadrant D1,882,2661,924,681

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07800
B07800
C07800
D07800

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0796680
B0849910
C0793670
D01144500

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0810
B0810
C0810
D0810

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A383376651.734617%
B383377221.883298%
C383375501.434645%
D3833711342.957978%

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 46137 38333 0 0 0.00% 0.00%
B 46137 38334 0 0 0.00% 0.00%
C 46137 38335 0 0 0.00% 0.00%
D 46137 38335 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 2129 10.36 590 550 152.4
A 7 110 1960 9.25 590 550 152.4
A 9 19 1675 7.38 590 550 152.4
B 2 9 1969 12.06 573 545 118.1
B 5 128 1499 8.08 573 545 118.1
B 14 254 1471 7.84 573 545 118.1
C 12 241 1584 6.61 586 541 157.9
C 1 81 1562 6.47 586 541 157.9
C 1 80 1558 6.44 586 541 157.9
D 1 3 1421 6.57 536 489 142.0
D 11 82 1414 6.52 536 489 142.0
D 3 14 1384 6.31 536 489 142.0

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