ASTROSAT CZTI

Data Quality Report

Orbit 52555

Creation date: 2025-06-16T07:03:28.696418
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/AS1C09_011T06_9000006478_52555cztM0_level2.fits modeM0/AS1C09_011T06_9000006478_52555cztM0_level2_quad_clean.evt
Size (bytes)839,629,44082,123,200
Size800.7 MB 78.3 MB
Events in quadrant A6,756,063563,892
Events in quadrant B6,923,893574,468
Events in quadrant C6,782,464526,625
Events in quadrant D10,121,654372,838

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0245792
B0250602
C0246372
D0345384

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0220
B0230
C0230
D0230

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A642897115.105787%
B6428120418.730554%
C6428105016.334785%
D6427246238.307142%

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 7623 6429 1088 1088 14.27% 16.92%
B 7623 6429 963 963 12.63% 14.98%
C 7623 6429 864 864 11.33% 13.44%
D 7622 6428 2179 2179 28.59% 33.90%

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 12 80 3689584 22152.71 657 639 166.5
A 4 95 167384 1001.33 657 639 166.5
A 4 239 63247 375.97 657 639 166.5
B 10 254 1814081 13678.27 630 609 132.6
B 10 44 1306850 9852.44 630 609 132.6
B 4 170 658626 4963.15 630 609 132.6
C 15 248 1479208 8646.85 617 613 171.0
C 15 224 960933 5615.97 617 613 171.0
C 13 3 854857 4995.63 617 613 171.0
D 6 42 3404593 22125.26 528 503 153.9
D 8 176 2334568 15170.51 528 503 153.9
D 12 17 682547 4433.02 528 503 153.9

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