ASTROSAT CZTI

Data Quality Report

Orbit 20180524_G08_028T01_9000002112_level2

Creation date: 2025-11-22T12:04:43.370998
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/AS1G08_028T01_9000002112cztM0_level2.fits modeM0/AS1G08_028T01_9000002112cztM0_level2_quad_clean.evt
Size (bytes)248,742,720261,961,920
Size237.2 MB 249.8 MB
Events in quadrant A1,519,0521,620,015
Events in quadrant B1,423,9221,561,249
Events in quadrant C1,474,3561,516,621
Events in quadrant D1,259,8941,380,497

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0250
B0250
C0250
D0250

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0564890
B0642860
C0578490
D0756310

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05480
B05480
C05480
D05480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A269803161.171238%
B2698010904.040030%
C269803051.130467%
D2698017426.456635%

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 29410 26977 0 0 0.00% 0.00%
B 29410 26949 0 0 0.00% 0.00%
C 29410 26978 0 0 0.00% 0.00%
D 29410 26952 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 1544 11.81 393 367 99.6
A 0 29 1479 11.16 393 367 99.6
A 14 204 1299 9.35 393 367 99.6
B 2 9 1239 11.49 374 355 77.0
B 3 80 953 7.77 374 355 77.0
B 5 232 950 7.73 374 355 77.0
C 12 241 1067 6.89 389 360 102.7
C 2 191 1032 6.55 389 360 102.7
C 9 233 1031 6.54 389 360 102.7
D 7 5 945 6.29 358 325 98.5
D 1 3 919 6.03 358 325 98.5
D 3 14 904 5.88 358 325 98.5

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