ASTROSAT CZTI

Data Quality Report

Orbit 51991

Creation date: 2025-05-09T09:08:30.924260
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_9000006468_51991cztM0_level2.fits modeM0/AS1C09_011T06_9000006468_51991cztM0_level2_quad_clean.evt
Size (bytes)528,096,96070,220,160
Size503.6 MB 67.0 MB
Events in quadrant A5,643,900417,578
Events in quadrant B3,285,051502,888
Events in quadrant C4,988,458436,108
Events in quadrant D5,225,959403,815

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02049393
B01367343
C01855565
D01930964

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0162
B0151
C0140
D0151

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01073
B01062
C01062
D01062

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A522285216.315588%
B52252815.377990%
C522369513.306529%
D522357010.913268%

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 7993 5227 724 724 9.06% 13.85%
B 7993 5229 133 133 1.66% 2.54%
C 7993 5226 587 587 7.34% 11.23%
D 7993 5229 487 487 6.09% 9.31%

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 7 64 1926240 15641.6 484 470 123.1
A 12 2 596994 4845.12 484 470 123.1
A 4 95 187354 1517.92 484 470 123.1
B 4 206 271437 2469.83 516 498 109.7
B 0 172 140312 1274.52 516 498 109.7
B 0 213 121697 1104.83 516 498 109.7
C 15 224 2066600 14981.42 493 488 137.9
C 13 3 448521 3248.7 493 488 137.9
C 9 38 144232 1042.29 493 488 137.9
D 8 176 1366930 9819.94 480 459 139.2
D 6 42 843666 6059.58 480 459 139.2
D 12 17 437985 3144.21 480 459 139.2

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