ASTROSAT CZTI

Data Quality Report

Orbit 35487

Creation date: 2022-04-21T22:40:33.916462
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/AS1A11_097T22_9000005082_35487cztM0_level2.evt modeM0/AS1A11_097T22_9000005082_35487cztM0_level2_quad_clean.evt
Size (bytes)141,505,92022,164,480
Size135.0 MB 21.1 MB
Events in quadrant A923,532137,351
Events in quadrant B1,270,479139,868
Events in quadrant C1,022,050137,938
Events in quadrant D954,490133,721

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0150
C0150
D0150

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A037282
B048091
C040101
D038411

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0340
B0340
C0340
D0340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1659291.748041%
B165916910.186860%
C1659382.290536%
D165980.482218%

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 3121 1660 6 6 0.19% 0.36%
B 3121 1660 101 101 3.24% 6.08%
C 3121 1660 23 23 0.74% 1.39%
D 3121 1660 6 6 0.19% 0.36%

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 15 169 62755 1415.0 207 202 44.2
A 10 83 56902 1282.6 207 202 44.2
A 13 254 2594 54.11 207 202 44.2
B 5 172 219906 5403.0 198 193 40.7
B 5 236 144261 3542.8 198 193 40.7
B 4 171 81865 2008.41 198 193 40.7
C 0 207 87328 1814.68 199 199 48.0
C 0 10 75766 1573.87 199 199 48.0
C 15 214 70674 1467.82 199 199 48.0
D 8 195 58767 1136.82 202 196 51.5
D 2 153 34034 656.77 202 196 51.5
D 7 80 26316 506.97 202 196 51.5

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