ASTROSAT CZTI

Data Quality Report

Orbit 38821

Creation date: 2024-06-27T21:56:50.927514
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/AS1A12_061T07_9000005402_38821cztM0_level2.fits modeM0/AS1A12_061T07_9000005402_38821cztM0_level2_quad_clean.evt
Size (bytes)1,088,184,960308,180,160
Size1.0 GB 293.9 MB
Events in quadrant A10,041,2302,092,717
Events in quadrant B8,288,0112,124,269
Events in quadrant C9,120,6491,988,804
Events in quadrant D11,402,8951,854,602

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0640
B0640
C0640
D0640

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03760
B03760
C03760
D03760

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0418285
B0372954
C0389124
D0464574

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A184461090.590914%
B18446200.108425%
C18446820.444541%
D184461670.905345%

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 24868 18450 98 98 0.39% 0.53%
B 24868 18450 3 3 0.01% 0.02%
C 24868 18450 68 68 0.27% 0.37%
D 24868 18450 161 161 0.65% 0.87%

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 10 83 1129224 2752.22 2033 1997 409.6
A 13 248 978738 2384.8 2033 1997 409.6
A 9 143 35274 81.25 2033 1997 409.6
B 0 230 94191 237.42 2030 1977 388.4
B 4 251 53291 132.12 2030 1977 388.4
B 12 111 50345 124.53 2030 1977 388.4
C 15 214 802112 1748.78 1975 1985 457.5
C 1 23 354404 770.25 1975 1985 457.5
C 14 254 113942 244.7 1975 1985 457.5
D 12 235 1188723 2510.69 1960 1912 472.7
D 2 16 1065846 2250.75 1960 1912 472.7
D 5 222 562017 1184.9 1960 1912 472.7

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