ASTROSAT CZTI

Data Quality Report

Orbit 18576

Creation date: 2024-06-27T17:51:40.870345
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/AS1A05_075T07_9000002760_18576cztM0_level2.evt modeM0/AS1A05_075T07_9000002760_18576cztM0_level2_quad_clean.evt
Size (bytes)578,566,080107,023,680
Size551.8 MB 102.1 MB
Events in quadrant A3,554,853682,687
Events in quadrant B3,635,560700,714
Events in quadrant C3,697,959680,490
Events in quadrant D6,109,972640,622

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A030
B030
C030
D030

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0158631
B0159741
C0161412
D0235121

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01560
B01560
C01560
D01560

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A77211021.321072%
B77221301.683502%
C77211431.852092%
D772184010.879420%

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 7921 7722 0 0 0.00% 0.00%
B 7922 7724 4 4 0.05% 0.05%
C 7921 7723 11 11 0.14% 0.14%
D 7921 7723 673 673 8.50% 8.71%

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 13 254 12154 59.88 920 901 187.9
A 0 226 7948 37.5 920 901 187.9
A 3 137 7522 35.23 920 901 187.9
B 12 111 22095 118.21 924 898 179.3
B 11 111 19122 101.63 924 898 179.3
B 14 111 16614 87.64 924 898 179.3
C 14 238 137042 651.93 886 891 208.8
C 9 54 91046 431.69 886 891 208.8
C 3 233 13973 62.64 886 891 208.8
D 7 238 2319936 11181.14 849 823 207.4
D 1 52 470847 2266.13 849 823 207.4
D 10 50 56231 267.14 849 823 207.4

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