ASTROSAT CZTI

Data Quality Report

Orbit 20180529_A04_201T03_9000002128_level2

Creation date: 2025-11-22T15:44:04.292464
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_201T03_9000002128cztM0_level2.fits modeM0/AS1A04_201T03_9000002128cztM0_level2_quad_clean.evt
Size (bytes)383,506,560367,853,760
Size365.7 MB 350.8 MB
Events in quadrant A2,376,2862,237,443
Events in quadrant B2,280,5042,234,194
Events in quadrant C2,287,1842,076,836
Events in quadrant D2,001,4761,922,837

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0817240
B0850970
C0943550
D0942470

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07940
B07940
C07940
D07940

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0600
B0600
C0600
D0600

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A388457121.832926%
B388459252.381259%
C388459602.471361%
D388459862.538293%

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 49808 38841 0 0 0.00% 0.00%
B 49808 38840 0 0 0.00% 0.00%
C 49808 38841 0 0 0.00% 0.00%
D 49808 38841 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 2204 10.44 619 580 155.6
A 7 110 1874 8.32 619 580 155.6
A 15 236 1827 8.01 619 580 155.6
B 2 9 1953 11.58 602 577 118.9
B 3 17 1593 8.55 602 577 118.9
B 5 225 1502 7.78 602 577 118.9
C 12 241 1610 6.72 604 563 155.7
C 2 191 1535 6.24 604 563 155.7
C 9 233 1497 6.0 604 563 155.7
D 6 231 1478 6.2 572 519 154.8
D 6 38 1418 5.81 572 519 154.8
D 3 14 1404 5.72 572 519 154.8

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