ASTROSAT CZTI

Data Quality Report

Orbit 55833

Creation date: 2026-01-23T01:12:47.522217
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_127T10_9000006542_55833cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55833cztM0_level2_quad_clean.evt
Size (bytes)1,559,462,400335,125,440
Size1.5 GB 319.6 MB
Events in quadrant A16,377,4852,098,345
Events in quadrant B11,356,1982,347,654
Events in quadrant C12,124,5902,109,668
Events in quadrant D16,013,5831,942,475

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0652744
B0522433
C0550793
D0653903

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0140
D0140

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04860
B04860
C04860
D04860

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A2395415576.499958%
B239554812.007932%
C239555362.237529%
D2395512995.422668%

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 25394 23956 1195 1195 4.71% 4.99%
B 25395 23958 219 219 0.86% 0.91%
C 25395 23957 424 424 1.67% 1.77%
D 25395 23957 1046 1046 4.12% 4.37%

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 15 32 2069760 3441.39 2413 2352 600.7
A 0 8 1325761 2202.94 2413 2352 600.7
A 12 115 1322878 2198.14 2413 2352 600.7
B 5 185 814907 1563.11 2435 2336 519.8
B 0 213 333375 636.81 2435 2336 519.8
B 10 247 142129 268.91 2435 2336 519.8
C 13 3 1637692 2488.57 2405 2383 657.1
C 6 223 346385 523.49 2405 2383 657.1
C 12 252 274587 414.23 2405 2383 657.1
D 11 129 2997795 4503.19 2360 2256 665.2
D 2 62 1325030 1988.53 2360 2256 665.2
D 3 12 722624 1082.93 2360 2256 665.2

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