ASTROSAT CZTI

Data Quality Report

Orbit 20170416_A03_062T01_9000001176_level2

Creation date: 2025-11-11T20:59:38.478390
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/AS1A03_062T01_9000001176cztM0_level2.fits modeM0/AS1A03_062T01_9000001176cztM0_level2_quad_clean.evt
Size (bytes)360,987,840286,148,160
Size344.3 MB 272.9 MB
Events in quadrant A2,229,7901,608,336
Events in quadrant B2,152,6101,627,381
Events in quadrant C2,166,1021,518,349
Events in quadrant D1,870,9701,397,376

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0765050
B0780080
C0753210
D0819620

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07480
B07480
C07480
D07480

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0840
B0840
C0840
D0840

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A365955251.434622%
B365954671.276131%
C365951910.521929%
D365954841.322585%

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 44925 36595 0 0 0.00% 0.00%
B 44925 36591 0 0 0.00% 0.00%
C 44925 36594 0 0 0.00% 0.00%
D 44925 36592 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 2082 10.43 580 544 147.5
A 7 110 1759 8.24 580 544 147.5
A 9 19 1637 7.41 580 544 147.5
B 2 9 1808 11.1 568 542 114.1
B 5 128 1475 8.18 568 542 114.1
B 12 226 1423 7.72 568 542 114.1
C 1 81 1562 6.77 572 532 152.0
C 1 80 1541 6.64 572 532 152.0
C 2 191 1464 6.13 572 532 152.0
D 6 231 1447 6.73 533 485 142.9
D 6 83 1324 5.87 533 485 142.9
D 7 5 1316 5.82 533 485 142.9

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