ASTROSAT CZTI

Data Quality Report

Orbit 20171123_A04_037T02_9000001718_level2

Creation date: 2025-11-18T16:26:05.101719
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_037T02_9000001718cztM0_level2.fits modeM0/AS1A04_037T02_9000001718cztM0_level2_quad_clean.evt
Size (bytes)341,795,520327,251,520
Size326.0 MB 312.1 MB
Events in quadrant A2,003,1541,918,610
Events in quadrant B2,008,1761,983,966
Events in quadrant C2,059,3761,866,175
Events in quadrant D1,698,2601,561,570

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01089050
B0798570
C0765630
D01169450

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07660
B07660
C07660
D07660

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0420
B0420
C0420
D0420

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A3755922746.054474%
B375593921.043691%
C375591060.282223%
D37559421711.227668%

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 41749 37550 0 0 0.00% 0.00%
B 41749 37559 0 0 0.00% 0.00%
C 41749 37559 0 0 0.00% 0.00%
D 41749 37558 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 2023 11.38 521 486 135.1
A 7 110 1652 8.63 521 486 135.1
A 0 30 1551 7.89 521 486 135.1
B 2 9 1749 11.35 529 500 110.1
B 5 128 1359 7.8 529 500 110.1
B 2 8 1357 7.78 529 500 110.1
C 1 81 1558 7.33 543 502 144.0
C 1 80 1537 7.19 543 502 144.0
C 12 241 1481 6.8 543 502 144.0
D 3 14 1350 6.97 484 439 130.7
D 6 231 1232 6.07 484 439 130.7
D 3 31 1205 5.86 484 439 130.7

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