ASTROSAT CZTI

Data Quality Report

Orbit 37171

Creation date: 2024-06-27T21:36:28.519362
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/AS1A11_079T01_9000005284_37171cztM0_level2.evt modeM0/AS1A11_079T01_9000005284_37171cztM0_level2_quad_clean.evt
Size (bytes)425,894,40058,291,200
Size406.2 MB 55.6 MB
Events in quadrant A2,737,904361,568
Events in quadrant B2,727,151364,945
Events in quadrant C2,953,550355,276
Events in quadrant D4,131,697324,000

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0340
B0340
C0340
D0350

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01040
B01040
C01040
D01040

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0111053
B0111892
C0115972
D0155512

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5124170.331772%
B5124460.897736%
C5124460.897736%
D51244178.138173%

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 7007 5125 5 5 0.07% 0.10%
B 7007 5125 24 24 0.34% 0.47%
C 7007 5125 42 42 0.60% 0.82%
D 7007 5125 385 385 5.49% 7.51%

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 250230 1961.61 637 627 127.2
A 9 143 14362 107.94 637 627 127.2
A 13 6 9104 66.62 637 627 127.2
B 5 172 196552 1639.19 626 613 119.5
B 4 232 31463 258.09 626 613 119.5
B 0 213 17213 138.87 626 613 119.5
C 15 214 222572 1557.03 608 616 142.6
C 0 10 169017 1181.34 608 616 142.6
C 0 207 153253 1070.75 608 616 142.6
D 2 249 646710 4549.01 588 571 142.0
D 2 250 646513 4547.63 588 571 142.0
D 12 6 254581 1788.31 588 571 142.0

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