ASTROSAT CZTI

Data Quality Report

Orbit 50755

Creation date: 2025-02-15T01:13:14.736215
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/AS1C07_001T01_9000006450_50755cztM0_level2.fits modeM0/AS1C07_001T01_9000006450_50755cztM0_level2_quad_clean.evt
Size (bytes)520,931,52090,702,720
Size496.8 MB 86.5 MB
Events in quadrant A4,276,581602,754
Events in quadrant B3,499,878650,296
Events in quadrant C4,411,094567,561
Events in quadrant D6,616,095494,012

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01282
B01282
C01282
D01282

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A017203281
B014894213
C017725270
D024472487

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A61841963.169470%
B61932564.133699%
C61863836.191400%
D617081613.225284%

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 7315 6202 72 72 0.98% 1.16%
B 7338 6215 95 95 1.29% 1.53%
C 7323 6204 247 247 3.37% 3.98%
D 7295 6184 741 741 10.16% 11.98%

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 4 4 320488 1904.94 675 657 167.9
A 4 3 263829 1567.47 675 657 167.9
A 9 96 203941 1210.77 675 657 167.9
B 10 247 167729 1183.82 672 647 141.1
B 8 128 140889 993.65 672 647 141.1
B 4 206 120340 848.06 672 647 141.1
C 10 171 572413 3173.85 660 654 180.1
C 13 3 325817 1804.99 660 654 180.1
C 5 10 236951 1311.69 660 654 180.1
D 15 93 828919 4827.72 624 603 171.6
D 8 176 631157 3675.09 624 603 171.6
D 2 153 619091 3604.77 624 603 171.6

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