ASTROSAT CZTI

Data Quality Report

Orbit 20220226_A07_138T08_9000004970_level2

Creation date: 2026-01-01T12:26:24.841799
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/AS1A07_138T08_9000004970cztM0_level2.fits modeM0/AS1A07_138T08_9000004970cztM0_level2_quad_clean.evt
Size (bytes)321,914,880216,498,240
Size307.0 MB 206.5 MB
Events in quadrant A2,024,3781,146,912
Events in quadrant B1,866,4841,066,026
Events in quadrant C1,960,8041,107,514
Events in quadrant D1,635,928973,229

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0688560
B0901810
C0689080
D01186400

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06720
B06720
C06720
D06720

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A329011160.352573%
B3290121346.486125%
C329011150.349533%
D3290118865.732349%

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 46682 32899 0 0 0.00% 0.00%
B 46682 32890 0 0 0.00% 0.00%
C 46682 32901 0 0 0.00% 0.00%
D 46682 32900 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 9 19 1645 8.92 529 502 128.1
A 0 29 1625 8.76 529 502 128.1
A 7 110 1578 8.4 529 502 128.1
B 2 9 1609 11.62 495 475 97.6
B 3 80 1431 9.8 495 475 97.6
B 2 8 1402 9.5 495 475 97.6
C 1 81 1595 8.34 518 489 132.6
C 3 202 1551 8.01 518 489 132.6
C 1 80 1546 7.97 518 489 132.6
D 6 231 1214 6.34 468 429 123.9
D 7 3 1212 6.32 468 429 123.9
D 10 189 1204 6.26 468 429 123.9

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