ASTROSAT CZTI

Data Quality Report

Orbit 35774

Creation date: 2022-05-13T17:43:24.417436
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/AS1A09_121T01_9000005136_35774cztM0_level2.evt modeM0/AS1A09_121T01_9000005136_35774cztM0_level2_quad_clean.evt
Size (bytes)479,306,88059,310,720
Size457.1 MB 56.6 MB
Events in quadrant A2,881,023353,268
Events in quadrant B3,933,358348,522
Events in quadrant C3,523,425344,958
Events in quadrant D3,772,816331,843

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0270
B0270
C0270
D0270

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0122883
B0156002
C0140852
D0151262

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01240
B01240
C01240
D01240

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5967130.217865%
B59672884.826546%
C59671712.865762%
D59671933.234456%

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 8683 5969 7 7 0.08% 0.12%
B 8683 5969 222 222 2.56% 3.72%
C 8683 5969 114 114 1.31% 1.91%
D 8683 5969 160 160 1.84% 2.68%

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 10 83 170182 1210.19 688 675 140.1
A 10 248 14832 101.07 688 675 140.1
A 13 6 14563 99.15 688 675 140.1
B 5 172 765534 5844.93 675 655 130.9
B 0 213 142680 1085.3 675 655 130.9
B 5 255 136887 1041.03 675 655 130.9
C 0 10 369866 2382.89 662 667 154.9
C 15 214 251870 1621.32 662 667 154.9
C 1 23 246813 1588.68 662 667 154.9
D 13 249 206253 1220.9 662 646 168.4
D 2 249 186583 1104.1 662 646 168.4
D 8 195 139926 827.05 662 646 168.4

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