ASTROSAT CZTI

Data Quality Report

Orbit 20171116_T01_206T01_9000001694_level2

Creation date: 2025-11-18T09:38:01.828190
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/AS1T01_206T01_9000001694cztM0_level2.fits modeM0/AS1T01_206T01_9000001694cztM0_level2_quad_clean.evt
Size (bytes)331,830,720280,123,200
Size316.5 MB 267.1 MB
Events in quadrant A2,039,4121,675,251
Events in quadrant B1,974,2041,636,300
Events in quadrant C2,068,7581,585,334
Events in quadrant D1,581,6261,204,915

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07060
B07060
C07060
D07060

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01043620
B0935410
C0714480
D01379760

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0700
B0700
C0700
D0700

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A3465719225.545777%
B3465820095.796641%
C346562790.805055%
D34656824623.793860%

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 41678 34609 0 0 0.00% 0.00%
B 41678 34655 0 0 0.00% 0.00%
C 41678 34657 0 0 0.00% 0.00%
D 41678 34500 0 0 0.00% 0.00%

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 14 188 2167 12.35 530 497 135.2
A 0 29 1997 11.09 530 497 135.2
A 14 204 1759 9.33 530 497 135.2
B 2 9 1674 11.32 519 496 104.0
B 3 17 1335 8.06 519 496 104.0
B 12 226 1307 7.79 519 496 104.0
C 1 81 1628 7.88 545 509 142.0
C 1 80 1566 7.44 545 509 142.0
C 12 241 1411 6.35 545 509 142.0
D 6 231 1219 6.66 450 411 121.3
D 3 14 1144 6.04 450 411 121.3
D 1 19 1104 5.71 450 411 121.3

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