ASTROSAT CZTI

Data Quality Report

Orbit 20170809_G07_072T01_9000001452_level2

Creation date: 2025-11-16T15:44:43.343987
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/AS1G07_072T01_9000001452cztM0_level2.fits modeM0/AS1G07_072T01_9000001452cztM0_level2_quad_clean.evt
Size (bytes)393,065,280275,215,680
Size374.9 MB 262.5 MB
Events in quadrant A2,425,3841,451,150
Events in quadrant B2,313,6761,453,384
Events in quadrant C2,363,3341,404,332
Events in quadrant D1,998,1101,223,921

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08510
B08550
C08320
D08540

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0850790
B0882430
C0852810
D01019680

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01010
B0980
C0960
D01020

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A409664761.161939%
B408845931.450445%
C409334010.979650%
D400998692.167136%

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 86562 43522 0 0 0.00% 0.00%
B 86562 43342 0 0 0.00% 0.00%
C 86562 43440 0 0 0.00% 0.00%
D 86562 42429 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 2365 11.21 631 592 158.2
A 7 110 1972 8.72 631 592 158.2
A 0 30 1876 8.11 631 592 158.2
B 2 9 1971 11.23 613 587 123.3
B 12 226 1574 8.01 613 587 123.3
B 5 128 1562 7.91 613 587 123.3
C 1 81 1719 7.01 624 580 162.6
C 1 80 1707 6.93 624 580 162.6
C 9 233 1630 6.46 624 580 162.6
D 3 14 1566 6.84 569 517 153.4
D 6 231 1432 5.96 569 517 153.4
D 6 83 1414 5.85 569 517 153.4

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