ASTROSAT CZTI

Data Quality Report

Orbit 12462

Creation date: 2024-06-27T16:27:43.195556
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/AS1A04_174T01_9000001850_12462cztM0_level2.evt modeM0/AS1A04_174T01_9000001850_12462cztM0_level2_quad_clean.evt
Size (bytes)692,421,12076,936,320
Size660.3 MB 73.4 MB
Events in quadrant A10,341,943383,438
Events in quadrant B3,500,700523,485
Events in quadrant C2,851,268527,237
Events in quadrant D3,881,023486,497

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0347822
B0140491
C0120191
D0154701

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0130

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01200
B01200
C01200
D01200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5833306952.614435%
B58332474.234528%
C5833100.171438%
D58332864.903137%

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 7169 5834 2712 2712 37.83% 46.49%
B 7169 5835 95 95 1.33% 1.63%
C 7169 5835 0 0 0.00% 0.00%
D 7169 5835 262 262 3.65% 4.49%

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 0 23 5548303 44961.18 602 593 123.4
A 13 251 1762418 14278.64 602 593 123.4
A 0 226 396969 3212.41 602 593 123.4
B 4 239 436415 3113.14 742 727 140.0
B 0 219 49026 345.11 742 727 140.0
B 11 51 40335 283.01 742 727 140.0
C 13 61 5519 28.14 730 738 169.9
C 14 234 3820 18.14 730 738 169.9
C 3 202 1715 5.75 730 738 169.9
D 1 52 595730 3533.68 700 682 168.4
D 9 85 459383 2723.98 700 682 168.4
D 13 249 86055 506.99 700 682 168.4

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