ASTROSAT CZTI

Data Quality Report

Orbit 20171024_G08_075T01_9000001636_level2

Creation date: 2025-11-17T23:24:05.454786
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_9000001636cztM0_level2.fits modeM0/AS1G08_075T01_9000001636cztM0_level2_quad_clean.evt
Size (bytes)415,166,400353,776,320
Size395.9 MB 337.4 MB
Events in quadrant A2,443,6061,952,758
Events in quadrant B2,441,5521,993,012
Events in quadrant C2,498,1061,950,976
Events in quadrant D2,098,6651,726,305

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01310210
B01030960
C0924570
D01150020

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0840
B0820
C0830
D0840

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A09220
B09180
C09200
D09200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A4493421744.838207%
B4502010452.321191%
C450092600.577662%
D4500517273.837351%

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 54998 45063 0 0 0.00% 0.00%
B 54998 45132 0 0 0.00% 0.00%
C 54998 45131 0 0 0.00% 0.00%
D 54998 45099 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 0 29 2426 11.28 636 595 162.3
A 7 110 1989 8.59 636 595 162.3
A 0 30 1844 7.7 636 595 162.3
B 2 9 2095 11.67 642 611 127.2
B 3 17 1648 8.15 642 611 127.2
B 12 226 1601 7.79 642 611 127.2
C 1 81 1955 7.77 659 613 172.6
C 1 80 1906 7.49 659 613 172.6
C 2 191 1747 6.57 659 613 172.6
D 6 231 1602 6.62 598 543 160.0
D 3 14 1548 6.28 598 543 160.0
D 7 5 1489 5.91 598 543 160.0

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