ASTROSAT CZTI

Data Quality Report

Orbit 20171127_G08_075T01_9000001726_level2

Creation date: 2025-11-18T18:15:09.905061
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/AS1G08_075T01_9000001726cztM0_level2.fits modeM0/AS1G08_075T01_9000001726cztM0_level2_quad_clean.evt
Size (bytes)413,873,280412,151,040
Size394.7 MB 393.1 MB
Events in quadrant A2,466,3642,456,330
Events in quadrant B2,388,7182,406,641
Events in quadrant C2,453,6262,356,684
Events in quadrant D2,114,0182,151,656

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01167640
B01077850
C0927560
D01073420

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0450
B0450
C0450
D0450

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A09240
B09240
C09240
D09240

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A4530710052.218200%
B4530716123.557949%
C453072750.606970%
D4530710812.385945%

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 49847 45308 0 0 0.00% 0.00%
B 49847 45303 0 0 0.00% 0.00%
C 49847 45307 0 0 0.00% 0.00%
D 49847 45297 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 14 188 2515 11.85 641 599 161.7
A 0 29 2365 10.92 641 599 161.7
A 14 204 2010 8.73 641 599 161.7
B 2 9 2062 11.53 628 595 127.2
B 3 17 1660 8.37 628 595 127.2
B 14 254 1555 7.55 628 595 127.2
C 12 241 1806 7.08 648 599 170.4
C 3 158 1718 6.57 648 599 170.4
C 7 111 1657 6.21 648 599 170.4
D 3 14 1590 6.41 601 544 163.3
D 1 3 1504 5.88 601 544 163.3
D 6 231 1487 5.77 601 544 163.3

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