ASTROSAT CZTI

Data Quality Report

Orbit 55149

Creation date: 2025-12-07T23:16:32.690968
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/AS1A14_022T16_9000006532_55149cztM0_level2.fits modeM0/AS1A14_022T16_9000006532_55149cztM0_level2_quad_clean.evt
Size (bytes)1,400,572,800174,922,560
Size1.3 GB 166.8 MB
Events in quadrant A15,347,8681,050,145
Events in quadrant B8,635,7631,257,428
Events in quadrant C9,407,4371,175,165
Events in quadrant D17,388,145858,944

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02800
B02800
C02800
D02800

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0551741
B0358791
C0379011
D0613041

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020
B020
C020
D020

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A13804274319.871052%
B1380411007.968705%
C138054263.085838%
D13805343624.889533%

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 14059 13804 2421 2421 17.22% 17.54%
B 14059 13804 740 740 5.26% 5.36%
C 14060 13805 217 217 1.54% 1.57%
D 14059 13804 3243 3243 23.07% 23.49%

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 3 78 9165296 27208.77 1361 1324 336.8
A 4 206 437713 1295.68 1361 1324 336.8
A 0 8 317733 939.45 1361 1324 336.8
B 2 249 2194012 7224.48 1409 1353 303.5
B 5 185 438998 1441.97 1409 1353 303.5
B 4 81 269191 882.48 1409 1353 303.5
C 1 16 2301968 5994.15 1417 1405 383.8
C 13 3 410082 1064.81 1417 1405 383.8
C 14 254 289788 751.38 1417 1405 383.8
D 11 129 11214140 31145.25 1279 1224 360.0
D 15 42 267168 738.69 1279 1224 360.0
D 3 12 173131 477.49 1279 1224 360.0

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