ASTROSAT CZTI

Data Quality Report

Orbit 20180912_T02_090T01_9000002360_level2

Creation date: 2025-11-24T16:01:37.776288
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/AS1T02_090T01_9000002360cztM0_level2.fits modeM0/AS1T02_090T01_9000002360cztM0_level2_quad_clean.evt
Size (bytes)924,387,840917,527,680
Size881.6 MB 875.0 MB
Events in quadrant A5,685,6125,587,301
Events in quadrant B5,429,1825,600,872
Events in quadrant C5,633,3105,370,394
Events in quadrant D4,933,8344,917,731

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02061210
B02119790
C02016630
D02225670

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A018760
B018760
C018760
D018760

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01740
B01740
C01740
D01740

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9208618832.044828%
B9208622662.460743%
C9208618141.969898%
D9208625892.811502%

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 108355 92066 0 0 0.00% 0.00%
B 108355 92059 0 0 0.00% 0.00%
C 108355 92064 0 0 0.00% 0.00%
D 108355 92067 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 5628 11.69 1482 1394 362.2
A 7 110 4497 8.57 1482 1394 362.2
A 0 30 4287 7.99 1482 1394 362.2
B 2 9 4394 10.76 1440 1379 280.1
B 2 8 3760 8.5 1440 1379 280.1
B 12 226 3661 8.15 1440 1379 280.1
C 12 250 4014 6.91 1488 1395 378.9
C 12 241 3965 6.78 1488 1395 378.9
C 2 191 3851 6.48 1488 1395 378.9
D 6 231 3549 6.06 1408 1284 373.7
D 3 14 3496 5.92 1408 1284 373.7
D 10 189 3479 5.87 1408 1284 373.7

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