ASTROSAT CZTI

Data Quality Report

Orbit 35821

Creation date: 2022-05-19T13:49:19.770453
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/AS1A09_146T01_9000005142_35821cztM0_level2.evt modeM0/AS1A09_146T01_9000005142_35821cztM0_level2_quad_clean.evt
Size (bytes)1,881,334,080219,162,240
Size1.8 GB 209.0 MB
Events in quadrant A17,028,9081,322,591
Events in quadrant B12,544,8601,368,062
Events in quadrant C10,366,0251,345,641
Events in quadrant D15,703,3071,235,285

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04040
B04040
C04040
D04040

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0637915
B0501154
C0427294
D0603474

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0560
B0560
C0560
D0560

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1981915347.740047%
B198197583.824613%
C198192391.205914%
D1981914307.215298%

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 25460 19822 1236 1236 4.85% 6.24%
B 25460 19823 518 518 2.03% 2.61%
C 25460 19823 215 215 0.84% 1.08%
D 25460 19821 1245 1245 4.89% 6.28%

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 7697246 17054.23 2252 2204 451.2
A 10 83 441227 972.99 2252 2204 451.2
A 7 48 103090 223.59 2252 2204 451.2
B 5 172 1852684 4311.63 2251 2189 429.2
B 5 255 673818 1564.89 2251 2189 429.2
B 0 213 582270 1351.58 2251 2189 429.2
C 15 214 819098 1592.63 2226 2240 512.9
C 0 10 517667 1004.93 2226 2240 512.9
C 0 207 197561 380.82 2226 2240 512.9
D 2 250 1845245 3474.62 2186 2127 530.5
D 14 52 1451106 2731.59 2186 2127 530.5
D 1 52 1190491 2240.29 2186 2127 530.5

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