ASTROSAT CZTI

Data Quality Report

Orbit 00775

Creation date: 2024-06-27T14:02:46.836174
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/AS1P01_010T01_9000000108_00775cztM0_level2.evt modeM0/AS1P01_010T01_9000000108_00775cztM0_level2_quad_clean.evt
Size (bytes)1,491,969,600137,580,480
Size1.4 GB 131.2 MB
Events in quadrant A11,173,149881,794
Events in quadrant B11,943,163886,666
Events in quadrant C10,834,356881,138
Events in quadrant D10,607,683861,457

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01900
B01900
C01900
D01900

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0399140
B0421580
C0389660
D0383110

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A060
B060
C060
D060

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9461740.782158%
B9461991.046401%
C9461680.718740%
D94611541.627735%

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 10046 9462 262 262 2.61% 2.77%
B 10046 9462 407 407 4.05% 4.30%
C 10046 9462 281 281 2.80% 2.97%
D 10046 9462 318 318 3.17% 3.36%

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 0 117 166355 238.36 2838 2857 685.9
A 13 164 71867 100.61 2838 2857 685.9
A 15 171 26991 35.18 2838 2857 685.9
B 7 221 340184 483.59 2945 2953 697.4
B 0 220 220750 312.32 2945 2953 697.4
B 0 245 55947 75.99 2945 2953 697.4
C 10 17 314715 426.35 2630 2715 731.8
C 15 241 69248 90.92 2630 2715 731.8
C 10 207 63481 83.04 2630 2715 731.8
D 13 25 288918 358.82 2573 2665 797.8
D 10 157 175842 217.08 2573 2665 797.8
D 1 4 171270 211.35 2573 2665 797.8

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