ASTROSAT CZTI

Data Quality Report

Orbit 55492

Creation date: 2025-12-31T00:14:45.298857
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_099T01_9000006536_55492cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55492cztM0_level2_quad_clean.evt
Size (bytes)595,333,44091,172,160
Size567.8 MB 86.9 MB
Events in quadrant A3,432,042635,447
Events in quadrant B3,296,403680,375
Events in quadrant C7,026,943549,763
Events in quadrant D7,766,852432,151

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0149141
B0146811
C0255447
D0276381

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A66371021.536839%
B66371071.612174%
C663780812.174175%
D6637187928.310984%

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 7482 6639 55 55 0.74% 0.83%
B 7482 6639 39 39 0.52% 0.59%
C 7482 6639 642 642 8.58% 9.67%
D 7482 6639 1179 1179 15.76% 17.76%

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 329544 1909.79 703 684 172.2
A 12 115 134029 774.38 703 684 172.2
A 4 3 102126 589.11 703 684 172.2
B 5 172 323226 2163.97 692 666 149.1
B 10 247 109117 727.57 692 666 149.1
B 5 236 39898 263.2 692 666 149.1
C 9 38 3715436 20400.97 664 657 182.1
C 6 9 192816 1055.31 664 657 182.1
C 13 3 178478 976.56 664 657 182.1
D 7 70 3566103 21429.1 588 560 166.4
D 11 129 804480 4831.6 588 560 166.4
D 2 153 319435 1916.45 588 560 166.4

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